?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'drm-intel-next' of git://people.freedesktop.org/~keithp/linux into...
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / gpu / drm / i915 / intel_display.c
blob55a5b4c4edf1370c1c2857361d498770fffd6679
1 /*
2 * Copyright © 2006-2007 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Eric Anholt <eric@anholt.net>
25 */
26
27 #include <linux/cpufreq.h>
28 #include <linux/module.h>
29 #include <linux/input.h>
30 #include <linux/i2c.h>
31 #include <linux/kernel.h>
32 #include <linux/slab.h>
33 #include <linux/vgaarb.h>
34 #include <drm/drm_edid.h>
35 #include "drmP.h"
36 #include "intel_drv.h"
37 #include "i915_drm.h"
38 #include "i915_drv.h"
39 #include "i915_trace.h"
40 #include "drm_dp_helper.h"
41 #include "drm_crtc_helper.h"
42 #include <linux/dma_remapping.h>
43
44 #define HAS_eDP (intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))
45
46 bool intel_pipe_has_type(struct drm_crtc *crtc, int type);
47 static void intel_update_watermarks(struct drm_device *dev);
48 static void intel_increase_pllclock(struct drm_crtc *crtc);
49 static void intel_crtc_update_cursor(struct drm_crtc *crtc, bool on);
50
51 typedef struct {
52 /* given values */
53 int n;
54 int m1, m2;
55 int p1, p2;
56 /* derived values */
57 int dot;
58 int vco;
59 int m;
60 int p;
61 } intel_clock_t;
62
63 typedef struct {
64 int min, max;
65 } intel_range_t;
66
67 typedef struct {
68 int dot_limit;
69 int p2_slow, p2_fast;
70 } intel_p2_t;
71
72 #define INTEL_P2_NUM 2
73 typedef struct intel_limit intel_limit_t;
74 struct intel_limit {
75 intel_range_t dot, vco, n, m, m1, m2, p, p1;
76 intel_p2_t p2;
77 bool (* find_pll)(const intel_limit_t *, struct drm_crtc *,
78 int, int, intel_clock_t *);
79 };
80
81 /* FDI */
82 #define IRONLAKE_FDI_FREQ 2700000 /* in kHz for mode->clock */
83
84 static bool
85 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
86 int target, int refclk, intel_clock_t *best_clock);
87 static bool
88 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
89 int target, int refclk, intel_clock_t *best_clock);
90
91 static bool
92 intel_find_pll_g4x_dp(const intel_limit_t *, struct drm_crtc *crtc,
93 int target, int refclk, intel_clock_t *best_clock);
94 static bool
95 intel_find_pll_ironlake_dp(const intel_limit_t *, struct drm_crtc *crtc,
96 int target, int refclk, intel_clock_t *best_clock);
97
98 static inline u32 /* units of 100MHz */
99 intel_fdi_link_freq(struct drm_device *dev)
100 {
101 if (IS_GEN5(dev)) {
102 struct drm_i915_private *dev_priv = dev->dev_private;
103 return (I915_READ(FDI_PLL_BIOS_0) & FDI_PLL_FB_CLOCK_MASK) + 2;
104 } else
105 return 27;
106 }
107
108 static const intel_limit_t intel_limits_i8xx_dvo = {
109 .dot = { .min = 25000, .max = 350000 },
110 .vco = { .min = 930000, .max = 1400000 },
111 .n = { .min = 3, .max = 16 },
112 .m = { .min = 96, .max = 140 },
113 .m1 = { .min = 18, .max = 26 },
114 .m2 = { .min = 6, .max = 16 },
115 .p = { .min = 4, .max = 128 },
116 .p1 = { .min = 2, .max = 33 },
117 .p2 = { .dot_limit = 165000,
118 .p2_slow = 4, .p2_fast = 2 },
119 .find_pll = intel_find_best_PLL,
120 };
121
122 static const intel_limit_t intel_limits_i8xx_lvds = {
123 .dot = { .min = 25000, .max = 350000 },
124 .vco = { .min = 930000, .max = 1400000 },
125 .n = { .min = 3, .max = 16 },
126 .m = { .min = 96, .max = 140 },
127 .m1 = { .min = 18, .max = 26 },
128 .m2 = { .min = 6, .max = 16 },
129 .p = { .min = 4, .max = 128 },
130 .p1 = { .min = 1, .max = 6 },
131 .p2 = { .dot_limit = 165000,
132 .p2_slow = 14, .p2_fast = 7 },
133 .find_pll = intel_find_best_PLL,
134 };
135
136 static const intel_limit_t intel_limits_i9xx_sdvo = {
137 .dot = { .min = 20000, .max = 400000 },
138 .vco = { .min = 1400000, .max = 2800000 },
139 .n = { .min = 1, .max = 6 },
140 .m = { .min = 70, .max = 120 },
141 .m1 = { .min = 10, .max = 22 },
142 .m2 = { .min = 5, .max = 9 },
143 .p = { .min = 5, .max = 80 },
144 .p1 = { .min = 1, .max = 8 },
145 .p2 = { .dot_limit = 200000,
146 .p2_slow = 10, .p2_fast = 5 },
147 .find_pll = intel_find_best_PLL,
148 };
149
150 static const intel_limit_t intel_limits_i9xx_lvds = {
151 .dot = { .min = 20000, .max = 400000 },
152 .vco = { .min = 1400000, .max = 2800000 },
153 .n = { .min = 1, .max = 6 },
154 .m = { .min = 70, .max = 120 },
155 .m1 = { .min = 10, .max = 22 },
156 .m2 = { .min = 5, .max = 9 },
157 .p = { .min = 7, .max = 98 },
158 .p1 = { .min = 1, .max = 8 },
159 .p2 = { .dot_limit = 112000,
160 .p2_slow = 14, .p2_fast = 7 },
161 .find_pll = intel_find_best_PLL,
162 };
163
164
165 static const intel_limit_t intel_limits_g4x_sdvo = {
166 .dot = { .min = 25000, .max = 270000 },
167 .vco = { .min = 1750000, .max = 3500000},
168 .n = { .min = 1, .max = 4 },
169 .m = { .min = 104, .max = 138 },
170 .m1 = { .min = 17, .max = 23 },
171 .m2 = { .min = 5, .max = 11 },
172 .p = { .min = 10, .max = 30 },
173 .p1 = { .min = 1, .max = 3},
174 .p2 = { .dot_limit = 270000,
175 .p2_slow = 10,
176 .p2_fast = 10
177 },
178 .find_pll = intel_g4x_find_best_PLL,
179 };
180
181 static const intel_limit_t intel_limits_g4x_hdmi = {
182 .dot = { .min = 22000, .max = 400000 },
183 .vco = { .min = 1750000, .max = 3500000},
184 .n = { .min = 1, .max = 4 },
185 .m = { .min = 104, .max = 138 },
186 .m1 = { .min = 16, .max = 23 },
187 .m2 = { .min = 5, .max = 11 },
188 .p = { .min = 5, .max = 80 },
189 .p1 = { .min = 1, .max = 8},
190 .p2 = { .dot_limit = 165000,
191 .p2_slow = 10, .p2_fast = 5 },
192 .find_pll = intel_g4x_find_best_PLL,
193 };
194
195 static const intel_limit_t intel_limits_g4x_single_channel_lvds = {
196 .dot = { .min = 20000, .max = 115000 },
197 .vco = { .min = 1750000, .max = 3500000 },
198 .n = { .min = 1, .max = 3 },
199 .m = { .min = 104, .max = 138 },
200 .m1 = { .min = 17, .max = 23 },
201 .m2 = { .min = 5, .max = 11 },
202 .p = { .min = 28, .max = 112 },
203 .p1 = { .min = 2, .max = 8 },
204 .p2 = { .dot_limit = 0,
205 .p2_slow = 14, .p2_fast = 14
206 },
207 .find_pll = intel_g4x_find_best_PLL,
208 };
209
210 static const intel_limit_t intel_limits_g4x_dual_channel_lvds = {
211 .dot = { .min = 80000, .max = 224000 },
212 .vco = { .min = 1750000, .max = 3500000 },
213 .n = { .min = 1, .max = 3 },
214 .m = { .min = 104, .max = 138 },
215 .m1 = { .min = 17, .max = 23 },
216 .m2 = { .min = 5, .max = 11 },
217 .p = { .min = 14, .max = 42 },
218 .p1 = { .min = 2, .max = 6 },
219 .p2 = { .dot_limit = 0,
220 .p2_slow = 7, .p2_fast = 7
221 },
222 .find_pll = intel_g4x_find_best_PLL,
223 };
224
225 static const intel_limit_t intel_limits_g4x_display_port = {
226 .dot = { .min = 161670, .max = 227000 },
227 .vco = { .min = 1750000, .max = 3500000},
228 .n = { .min = 1, .max = 2 },
229 .m = { .min = 97, .max = 108 },
230 .m1 = { .min = 0x10, .max = 0x12 },
231 .m2 = { .min = 0x05, .max = 0x06 },
232 .p = { .min = 10, .max = 20 },
233 .p1 = { .min = 1, .max = 2},
234 .p2 = { .dot_limit = 0,
235 .p2_slow = 10, .p2_fast = 10 },
236 .find_pll = intel_find_pll_g4x_dp,
237 };
238
239 static const intel_limit_t intel_limits_pineview_sdvo = {
240 .dot = { .min = 20000, .max = 400000},
241 .vco = { .min = 1700000, .max = 3500000 },
242 /* Pineview's Ncounter is a ring counter */
243 .n = { .min = 3, .max = 6 },
244 .m = { .min = 2, .max = 256 },
245 /* Pineview only has one combined m divider, which we treat as m2. */
246 .m1 = { .min = 0, .max = 0 },
247 .m2 = { .min = 0, .max = 254 },
248 .p = { .min = 5, .max = 80 },
249 .p1 = { .min = 1, .max = 8 },
250 .p2 = { .dot_limit = 200000,
251 .p2_slow = 10, .p2_fast = 5 },
252 .find_pll = intel_find_best_PLL,
253 };
254
255 static const intel_limit_t intel_limits_pineview_lvds = {
256 .dot = { .min = 20000, .max = 400000 },
257 .vco = { .min = 1700000, .max = 3500000 },
258 .n = { .min = 3, .max = 6 },
259 .m = { .min = 2, .max = 256 },
260 .m1 = { .min = 0, .max = 0 },
261 .m2 = { .min = 0, .max = 254 },
262 .p = { .min = 7, .max = 112 },
263 .p1 = { .min = 1, .max = 8 },
264 .p2 = { .dot_limit = 112000,
265 .p2_slow = 14, .p2_fast = 14 },
266 .find_pll = intel_find_best_PLL,
267 };
268
269 /* Ironlake / Sandybridge
270 *
271 * We calculate clock using (register_value + 2) for N/M1/M2, so here
272 * the range value for them is (actual_value - 2).
273 */
274 static const intel_limit_t intel_limits_ironlake_dac = {
275 .dot = { .min = 25000, .max = 350000 },
276 .vco = { .min = 1760000, .max = 3510000 },
277 .n = { .min = 1, .max = 5 },
278 .m = { .min = 79, .max = 127 },
279 .m1 = { .min = 12, .max = 22 },
280 .m2 = { .min = 5, .max = 9 },
281 .p = { .min = 5, .max = 80 },
282 .p1 = { .min = 1, .max = 8 },
283 .p2 = { .dot_limit = 225000,
284 .p2_slow = 10, .p2_fast = 5 },
285 .find_pll = intel_g4x_find_best_PLL,
286 };
287
288 static const intel_limit_t intel_limits_ironlake_single_lvds = {
289 .dot = { .min = 25000, .max = 350000 },
290 .vco = { .min = 1760000, .max = 3510000 },
291 .n = { .min = 1, .max = 3 },
292 .m = { .min = 79, .max = 118 },
293 .m1 = { .min = 12, .max = 22 },
294 .m2 = { .min = 5, .max = 9 },
295 .p = { .min = 28, .max = 112 },
296 .p1 = { .min = 2, .max = 8 },
297 .p2 = { .dot_limit = 225000,
298 .p2_slow = 14, .p2_fast = 14 },
299 .find_pll = intel_g4x_find_best_PLL,
300 };
301
302 static const intel_limit_t intel_limits_ironlake_dual_lvds = {
303 .dot = { .min = 25000, .max = 350000 },
304 .vco = { .min = 1760000, .max = 3510000 },
305 .n = { .min = 1, .max = 3 },
306 .m = { .min = 79, .max = 127 },
307 .m1 = { .min = 12, .max = 22 },
308 .m2 = { .min = 5, .max = 9 },
309 .p = { .min = 14, .max = 56 },
310 .p1 = { .min = 2, .max = 8 },
311 .p2 = { .dot_limit = 225000,
312 .p2_slow = 7, .p2_fast = 7 },
313 .find_pll = intel_g4x_find_best_PLL,
314 };
315
316 /* LVDS 100mhz refclk limits. */
317 static const intel_limit_t intel_limits_ironlake_single_lvds_100m = {
318 .dot = { .min = 25000, .max = 350000 },
319 .vco = { .min = 1760000, .max = 3510000 },
320 .n = { .min = 1, .max = 2 },
321 .m = { .min = 79, .max = 126 },
322 .m1 = { .min = 12, .max = 22 },
323 .m2 = { .min = 5, .max = 9 },
324 .p = { .min = 28, .max = 112 },
325 .p1 = { .min = 2, .max = 8 },
326 .p2 = { .dot_limit = 225000,
327 .p2_slow = 14, .p2_fast = 14 },
328 .find_pll = intel_g4x_find_best_PLL,
329 };
330
331 static const intel_limit_t intel_limits_ironlake_dual_lvds_100m = {
332 .dot = { .min = 25000, .max = 350000 },
333 .vco = { .min = 1760000, .max = 3510000 },
334 .n = { .min = 1, .max = 3 },
335 .m = { .min = 79, .max = 126 },
336 .m1 = { .min = 12, .max = 22 },
337 .m2 = { .min = 5, .max = 9 },
338 .p = { .min = 14, .max = 42 },
339 .p1 = { .min = 2, .max = 6 },
340 .p2 = { .dot_limit = 225000,
341 .p2_slow = 7, .p2_fast = 7 },
342 .find_pll = intel_g4x_find_best_PLL,
343 };
344
345 static const intel_limit_t intel_limits_ironlake_display_port = {
346 .dot = { .min = 25000, .max = 350000 },
347 .vco = { .min = 1760000, .max = 3510000},
348 .n = { .min = 1, .max = 2 },
349 .m = { .min = 81, .max = 90 },
350 .m1 = { .min = 12, .max = 22 },
351 .m2 = { .min = 5, .max = 9 },
352 .p = { .min = 10, .max = 20 },
353 .p1 = { .min = 1, .max = 2},
354 .p2 = { .dot_limit = 0,
355 .p2_slow = 10, .p2_fast = 10 },
356 .find_pll = intel_find_pll_ironlake_dp,
357 };
358
359 static const intel_limit_t *intel_ironlake_limit(struct drm_crtc *crtc,
360 int refclk)
361 {
362 struct drm_device *dev = crtc->dev;
363 struct drm_i915_private *dev_priv = dev->dev_private;
364 const intel_limit_t *limit;
365
366 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
367 if ((I915_READ(PCH_LVDS) & LVDS_CLKB_POWER_MASK) ==
368 LVDS_CLKB_POWER_UP) {
369 /* LVDS dual channel */
370 if (refclk == 100000)
371 limit = &intel_limits_ironlake_dual_lvds_100m;
372 else
373 limit = &intel_limits_ironlake_dual_lvds;
374 } else {
375 if (refclk == 100000)
376 limit = &intel_limits_ironlake_single_lvds_100m;
377 else
378 limit = &intel_limits_ironlake_single_lvds;
379 }
380 } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
381 HAS_eDP)
382 limit = &intel_limits_ironlake_display_port;
383 else
384 limit = &intel_limits_ironlake_dac;
385
386 return limit;
387 }
388
389 static const intel_limit_t *intel_g4x_limit(struct drm_crtc *crtc)
390 {
391 struct drm_device *dev = crtc->dev;
392 struct drm_i915_private *dev_priv = dev->dev_private;
393 const intel_limit_t *limit;
394
395 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
396 if ((I915_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
397 LVDS_CLKB_POWER_UP)
398 /* LVDS with dual channel */
399 limit = &intel_limits_g4x_dual_channel_lvds;
400 else
401 /* LVDS with dual channel */
402 limit = &intel_limits_g4x_single_channel_lvds;
403 } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI) ||
404 intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
405 limit = &intel_limits_g4x_hdmi;
406 } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO)) {
407 limit = &intel_limits_g4x_sdvo;
408 } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
409 limit = &intel_limits_g4x_display_port;
410 } else /* The option is for other outputs */
411 limit = &intel_limits_i9xx_sdvo;
412
413 return limit;
414 }
415
416 static const intel_limit_t *intel_limit(struct drm_crtc *crtc, int refclk)
417 {
418 struct drm_device *dev = crtc->dev;
419 const intel_limit_t *limit;
420
421 if (HAS_PCH_SPLIT(dev))
422 limit = intel_ironlake_limit(crtc, refclk);
423 else if (IS_G4X(dev)) {
424 limit = intel_g4x_limit(crtc);
425 } else if (IS_PINEVIEW(dev)) {
426 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
427 limit = &intel_limits_pineview_lvds;
428 else
429 limit = &intel_limits_pineview_sdvo;
430 } else if (!IS_GEN2(dev)) {
431 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
432 limit = &intel_limits_i9xx_lvds;
433 else
434 limit = &intel_limits_i9xx_sdvo;
435 } else {
436 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
437 limit = &intel_limits_i8xx_lvds;
438 else
439 limit = &intel_limits_i8xx_dvo;
440 }
441 return limit;
442 }
443
444 /* m1 is reserved as 0 in Pineview, n is a ring counter */
445 static void pineview_clock(int refclk, intel_clock_t *clock)
446 {
447 clock->m = clock->m2 + 2;
448 clock->p = clock->p1 * clock->p2;
449 clock->vco = refclk * clock->m / clock->n;
450 clock->dot = clock->vco / clock->p;
451 }
452
453 static void intel_clock(struct drm_device *dev, int refclk, intel_clock_t *clock)
454 {
455 if (IS_PINEVIEW(dev)) {
456 pineview_clock(refclk, clock);
457 return;
458 }
459 clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
460 clock->p = clock->p1 * clock->p2;
461 clock->vco = refclk * clock->m / (clock->n + 2);
462 clock->dot = clock->vco / clock->p;
463 }
464
465 /**
466 * Returns whether any output on the specified pipe is of the specified type
467 */
468 bool intel_pipe_has_type(struct drm_crtc *crtc, int type)
469 {
470 struct drm_device *dev = crtc->dev;
471 struct drm_mode_config *mode_config = &dev->mode_config;
472 struct intel_encoder *encoder;
473
474 list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
475 if (encoder->base.crtc == crtc && encoder->type == type)
476 return true;
477
478 return false;
479 }
480
481 #define INTELPllInvalid(s) do { /* DRM_DEBUG(s); */ return false; } while (0)
482 /**
483 * Returns whether the given set of divisors are valid for a given refclk with
484 * the given connectors.
485 */
486
487 static bool intel_PLL_is_valid(struct drm_device *dev,
488 const intel_limit_t *limit,
489 const intel_clock_t *clock)
490 {
491 if (clock->p1 < limit->p1.min || limit->p1.max < clock->p1)
492 INTELPllInvalid("p1 out of range\n");
493 if (clock->p < limit->p.min || limit->p.max < clock->p)
494 INTELPllInvalid("p out of range\n");
495 if (clock->m2 < limit->m2.min || limit->m2.max < clock->m2)
496 INTELPllInvalid("m2 out of range\n");
497 if (clock->m1 < limit->m1.min || limit->m1.max < clock->m1)
498 INTELPllInvalid("m1 out of range\n");
499 if (clock->m1 <= clock->m2 && !IS_PINEVIEW(dev))
500 INTELPllInvalid("m1 <= m2\n");
501 if (clock->m < limit->m.min || limit->m.max < clock->m)
502 INTELPllInvalid("m out of range\n");
503 if (clock->n < limit->n.min || limit->n.max < clock->n)
504 INTELPllInvalid("n out of range\n");
505 if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
506 INTELPllInvalid("vco out of range\n");
507 /* XXX: We may need to be checking "Dot clock" depending on the multiplier,
508 * connector, etc., rather than just a single range.
509 */
510 if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
511 INTELPllInvalid("dot out of range\n");
512
513 return true;
514 }
515
516 static bool
517 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
518 int target, int refclk, intel_clock_t *best_clock)
519
520 {
521 struct drm_device *dev = crtc->dev;
522 struct drm_i915_private *dev_priv = dev->dev_private;
523 intel_clock_t clock;
524 int err = target;
525
526 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
527 (I915_READ(LVDS)) != 0) {
528 /*
529 * For LVDS, if the panel is on, just rely on its current
530 * settings for dual-channel. We haven't figured out how to
531 * reliably set up different single/dual channel state, if we
532 * even can.
533 */
534 if ((I915_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
535 LVDS_CLKB_POWER_UP)
536 clock.p2 = limit->p2.p2_fast;
537 else
538 clock.p2 = limit->p2.p2_slow;
539 } else {
540 if (target < limit->p2.dot_limit)
541 clock.p2 = limit->p2.p2_slow;
542 else
543 clock.p2 = limit->p2.p2_fast;
544 }
545
546 memset(best_clock, 0, sizeof(*best_clock));
547
548 for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
549 clock.m1++) {
550 for (clock.m2 = limit->m2.min;
551 clock.m2 <= limit->m2.max; clock.m2++) {
552 /* m1 is always 0 in Pineview */
553 if (clock.m2 >= clock.m1 && !IS_PINEVIEW(dev))
554 break;
555 for (clock.n = limit->n.min;
556 clock.n <= limit->n.max; clock.n++) {
557 for (clock.p1 = limit->p1.min;
558 clock.p1 <= limit->p1.max; clock.p1++) {
559 int this_err;
560
561 intel_clock(dev, refclk, &clock);
562 if (!intel_PLL_is_valid(dev, limit,
563 &clock))
564 continue;
565
566 this_err = abs(clock.dot - target);
567 if (this_err < err) {
568 *best_clock = clock;
569 err = this_err;
570 }
571 }
572 }
573 }
574 }
575
576 return (err != target);
577 }
578
579 static bool
580 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
581 int target, int refclk, intel_clock_t *best_clock)
582 {
583 struct drm_device *dev = crtc->dev;
584 struct drm_i915_private *dev_priv = dev->dev_private;
585 intel_clock_t clock;
586 int max_n;
587 bool found;
588 /* approximately equals target * 0.00585 */
589 int err_most = (target >> 8) + (target >> 9);
590 found = false;
591
592 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
593 int lvds_reg;
594
595 if (HAS_PCH_SPLIT(dev))
596 lvds_reg = PCH_LVDS;
597 else
598 lvds_reg = LVDS;
599 if ((I915_READ(lvds_reg) & LVDS_CLKB_POWER_MASK) ==
600 LVDS_CLKB_POWER_UP)
601 clock.p2 = limit->p2.p2_fast;
602 else
603 clock.p2 = limit->p2.p2_slow;
604 } else {
605 if (target < limit->p2.dot_limit)
606 clock.p2 = limit->p2.p2_slow;
607 else
608 clock.p2 = limit->p2.p2_fast;
609 }
610
611 memset(best_clock, 0, sizeof(*best_clock));
612 max_n = limit->n.max;
613 /* based on hardware requirement, prefer smaller n to precision */
614 for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
615 /* based on hardware requirement, prefere larger m1,m2 */
616 for (clock.m1 = limit->m1.max;
617 clock.m1 >= limit->m1.min; clock.m1--) {
618 for (clock.m2 = limit->m2.max;
619 clock.m2 >= limit->m2.min; clock.m2--) {
620 for (clock.p1 = limit->p1.max;
621 clock.p1 >= limit->p1.min; clock.p1--) {
622 int this_err;
623
624 intel_clock(dev, refclk, &clock);
625 if (!intel_PLL_is_valid(dev, limit,
626 &clock))
627 continue;
628
629 this_err = abs(clock.dot - target);
630 if (this_err < err_most) {
631 *best_clock = clock;
632 err_most = this_err;
633 max_n = clock.n;
634 found = true;
635 }
636 }
637 }
638 }
639 }
640 return found;
641 }
642
643 static bool
644 intel_find_pll_ironlake_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
645 int target, int refclk, intel_clock_t *best_clock)
646 {
647 struct drm_device *dev = crtc->dev;
648 intel_clock_t clock;
649
650 if (target < 200000) {
651 clock.n = 1;
652 clock.p1 = 2;
653 clock.p2 = 10;
654 clock.m1 = 12;
655 clock.m2 = 9;
656 } else {
657 clock.n = 2;
658 clock.p1 = 1;
659 clock.p2 = 10;
660 clock.m1 = 14;
661 clock.m2 = 8;
662 }
663 intel_clock(dev, refclk, &clock);
664 memcpy(best_clock, &clock, sizeof(intel_clock_t));
665 return true;
666 }
667
668 /* DisplayPort has only two frequencies, 162MHz and 270MHz */
669 static bool
670 intel_find_pll_g4x_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
671 int target, int refclk, intel_clock_t *best_clock)
672 {
673 intel_clock_t clock;
674 if (target < 200000) {
675 clock.p1 = 2;
676 clock.p2 = 10;
677 clock.n = 2;
678 clock.m1 = 23;
679 clock.m2 = 8;
680 } else {
681 clock.p1 = 1;
682 clock.p2 = 10;
683 clock.n = 1;
684 clock.m1 = 14;
685 clock.m2 = 2;
686 }
687 clock.m = 5 * (clock.m1 + 2) + (clock.m2 + 2);
688 clock.p = (clock.p1 * clock.p2);
689 clock.dot = 96000 * clock.m / (clock.n + 2) / clock.p;
690 clock.vco = 0;
691 memcpy(best_clock, &clock, sizeof(intel_clock_t));
692 return true;
693 }
694
695 /**
696 * intel_wait_for_vblank - wait for vblank on a given pipe
697 * @dev: drm device
698 * @pipe: pipe to wait for
699 *
700 * Wait for vblank to occur on a given pipe. Needed for various bits of
701 * mode setting code.
702 */
703 void intel_wait_for_vblank(struct drm_device *dev, int pipe)
704 {
705 struct drm_i915_private *dev_priv = dev->dev_private;
706 int pipestat_reg = PIPESTAT(pipe);
707
708 /* Clear existing vblank status. Note this will clear any other
709 * sticky status fields as well.
710 *
711 * This races with i915_driver_irq_handler() with the result
712 * that either function could miss a vblank event. Here it is not
713 * fatal, as we will either wait upon the next vblank interrupt or
714 * timeout. Generally speaking intel_wait_for_vblank() is only
715 * called during modeset at which time the GPU should be idle and
716 * should *not* be performing page flips and thus not waiting on
717 * vblanks...
718 * Currently, the result of us stealing a vblank from the irq
719 * handler is that a single frame will be skipped during swapbuffers.
720 */
721 I915_WRITE(pipestat_reg,
722 I915_READ(pipestat_reg) | PIPE_VBLANK_INTERRUPT_STATUS);
723
724 /* Wait for vblank interrupt bit to set */
725 if (wait_for(I915_READ(pipestat_reg) &
726 PIPE_VBLANK_INTERRUPT_STATUS,
727 50))
728 DRM_DEBUG_KMS("vblank wait timed out\n");
729 }
730
731 /*
732 * intel_wait_for_pipe_off - wait for pipe to turn off
733 * @dev: drm device
734 * @pipe: pipe to wait for
735 *
736 * After disabling a pipe, we can't wait for vblank in the usual way,
737 * spinning on the vblank interrupt status bit, since we won't actually
738 * see an interrupt when the pipe is disabled.
739 *
740 * On Gen4 and above:
741 * wait for the pipe register state bit to turn off
742 *
743 * Otherwise:
744 * wait for the display line value to settle (it usually
745 * ends up stopping at the start of the next frame).
746 *
747 */
748 void intel_wait_for_pipe_off(struct drm_device *dev, int pipe)
749 {
750 struct drm_i915_private *dev_priv = dev->dev_private;
751
752 if (INTEL_INFO(dev)->gen >= 4) {
753 int reg = PIPECONF(pipe);
754
755 /* Wait for the Pipe State to go off */
756 if (wait_for((I915_READ(reg) & I965_PIPECONF_ACTIVE) == 0,
757 100))
758 DRM_DEBUG_KMS("pipe_off wait timed out\n");
759 } else {
760 u32 last_line;
761 int reg = PIPEDSL(pipe);
762 unsigned long timeout = jiffies + msecs_to_jiffies(100);
763
764 /* Wait for the display line to settle */
765 do {
766 last_line = I915_READ(reg) & DSL_LINEMASK;
767 mdelay(5);
768 } while (((I915_READ(reg) & DSL_LINEMASK) != last_line) &&
769 time_after(timeout, jiffies));
770 if (time_after(jiffies, timeout))
771 DRM_DEBUG_KMS("pipe_off wait timed out\n");
772 }
773 }
774
775 static const char *state_string(bool enabled)
776 {
777 return enabled ? "on" : "off";
778 }
779
780 /* Only for pre-ILK configs */
781 static void assert_pll(struct drm_i915_private *dev_priv,
782 enum pipe pipe, bool state)
783 {
784 int reg;
785 u32 val;
786 bool cur_state;
787
788 reg = DPLL(pipe);
789 val = I915_READ(reg);
790 cur_state = !!(val & DPLL_VCO_ENABLE);
791 WARN(cur_state != state,
792 "PLL state assertion failure (expected %s, current %s)\n",
793 state_string(state), state_string(cur_state));
794 }
795 #define assert_pll_enabled(d, p) assert_pll(d, p, true)
796 #define assert_pll_disabled(d, p) assert_pll(d, p, false)
797
798 /* For ILK+ */
799 static void assert_pch_pll(struct drm_i915_private *dev_priv,
800 enum pipe pipe, bool state)
801 {
802 int reg;
803 u32 val;
804 bool cur_state;
805
806 if (HAS_PCH_CPT(dev_priv->dev)) {
807 u32 pch_dpll;
808
809 pch_dpll = I915_READ(PCH_DPLL_SEL);
810
811 /* Make sure the selected PLL is enabled to the transcoder */
812 WARN(!((pch_dpll >> (4 * pipe)) & 8),
813 "transcoder %d PLL not enabled\n", pipe);
814
815 /* Convert the transcoder pipe number to a pll pipe number */
816 pipe = (pch_dpll >> (4 * pipe)) & 1;
817 }
818
819 reg = PCH_DPLL(pipe);
820 val = I915_READ(reg);
821 cur_state = !!(val & DPLL_VCO_ENABLE);
822 WARN(cur_state != state,
823 "PCH PLL state assertion failure (expected %s, current %s)\n",
824 state_string(state), state_string(cur_state));
825 }
826 #define assert_pch_pll_enabled(d, p) assert_pch_pll(d, p, true)
827 #define assert_pch_pll_disabled(d, p) assert_pch_pll(d, p, false)
828
829 static void assert_fdi_tx(struct drm_i915_private *dev_priv,
830 enum pipe pipe, bool state)
831 {
832 int reg;
833 u32 val;
834 bool cur_state;
835
836 reg = FDI_TX_CTL(pipe);
837 val = I915_READ(reg);
838 cur_state = !!(val & FDI_TX_ENABLE);
839 WARN(cur_state != state,
840 "FDI TX state assertion failure (expected %s, current %s)\n",
841 state_string(state), state_string(cur_state));
842 }
843 #define assert_fdi_tx_enabled(d, p) assert_fdi_tx(d, p, true)
844 #define assert_fdi_tx_disabled(d, p) assert_fdi_tx(d, p, false)
845
846 static void assert_fdi_rx(struct drm_i915_private *dev_priv,
847 enum pipe pipe, bool state)
848 {
849 int reg;
850 u32 val;
851 bool cur_state;
852
853 reg = FDI_RX_CTL(pipe);
854 val = I915_READ(reg);
855 cur_state = !!(val & FDI_RX_ENABLE);
856 WARN(cur_state != state,
857 "FDI RX state assertion failure (expected %s, current %s)\n",
858 state_string(state), state_string(cur_state));
859 }
860 #define assert_fdi_rx_enabled(d, p) assert_fdi_rx(d, p, true)
861 #define assert_fdi_rx_disabled(d, p) assert_fdi_rx(d, p, false)
862
863 static void assert_fdi_tx_pll_enabled(struct drm_i915_private *dev_priv,
864 enum pipe pipe)
865 {
866 int reg;
867 u32 val;
868
869 /* ILK FDI PLL is always enabled */
870 if (dev_priv->info->gen == 5)
871 return;
872
873 reg = FDI_TX_CTL(pipe);
874 val = I915_READ(reg);
875 WARN(!(val & FDI_TX_PLL_ENABLE), "FDI TX PLL assertion failure, should be active but is disabled\n");
876 }
877
878 static void assert_fdi_rx_pll_enabled(struct drm_i915_private *dev_priv,
879 enum pipe pipe)
880 {
881 int reg;
882 u32 val;
883
884 reg = FDI_RX_CTL(pipe);
885 val = I915_READ(reg);
886 WARN(!(val & FDI_RX_PLL_ENABLE), "FDI RX PLL assertion failure, should be active but is disabled\n");
887 }
888
889 static void assert_panel_unlocked(struct drm_i915_private *dev_priv,
890 enum pipe pipe)
891 {
892 int pp_reg, lvds_reg;
893 u32 val;
894 enum pipe panel_pipe = PIPE_A;
895 bool locked = true;
896
897 if (HAS_PCH_SPLIT(dev_priv->dev)) {
898 pp_reg = PCH_PP_CONTROL;
899 lvds_reg = PCH_LVDS;
900 } else {
901 pp_reg = PP_CONTROL;
902 lvds_reg = LVDS;
903 }
904
905 val = I915_READ(pp_reg);
906 if (!(val & PANEL_POWER_ON) ||
907 ((val & PANEL_UNLOCK_REGS) == PANEL_UNLOCK_REGS))
908 locked = false;
909
910 if (I915_READ(lvds_reg) & LVDS_PIPEB_SELECT)
911 panel_pipe = PIPE_B;
912
913 WARN(panel_pipe == pipe && locked,
914 "panel assertion failure, pipe %c regs locked\n",
915 pipe_name(pipe));
916 }
917
918 static void assert_pipe(struct drm_i915_private *dev_priv,
919 enum pipe pipe, bool state)
920 {
921 int reg;
922 u32 val;
923 bool cur_state;
924
925 reg = PIPECONF(pipe);
926 val = I915_READ(reg);
927 cur_state = !!(val & PIPECONF_ENABLE);
928 WARN(cur_state != state,
929 "pipe %c assertion failure (expected %s, current %s)\n",
930 pipe_name(pipe), state_string(state), state_string(cur_state));
931 }
932 #define assert_pipe_enabled(d, p) assert_pipe(d, p, true)
933 #define assert_pipe_disabled(d, p) assert_pipe(d, p, false)
934
935 static void assert_plane_enabled(struct drm_i915_private *dev_priv,
936 enum plane plane)
937 {
938 int reg;
939 u32 val;
940
941 reg = DSPCNTR(plane);
942 val = I915_READ(reg);
943 WARN(!(val & DISPLAY_PLANE_ENABLE),
944 "plane %c assertion failure, should be active but is disabled\n",
945 plane_name(plane));
946 }
947
948 static void assert_planes_disabled(struct drm_i915_private *dev_priv,
949 enum pipe pipe)
950 {
951 int reg, i;
952 u32 val;
953 int cur_pipe;
954
955 /* Planes are fixed to pipes on ILK+ */
956 if (HAS_PCH_SPLIT(dev_priv->dev))
957 return;
958
959 /* Need to check both planes against the pipe */
960 for (i = 0; i < 2; i++) {
961 reg = DSPCNTR(i);
962 val = I915_READ(reg);
963 cur_pipe = (val & DISPPLANE_SEL_PIPE_MASK) >>
964 DISPPLANE_SEL_PIPE_SHIFT;
965 WARN((val & DISPLAY_PLANE_ENABLE) && pipe == cur_pipe,
966 "plane %c assertion failure, should be off on pipe %c but is still active\n",
967 plane_name(i), pipe_name(pipe));
968 }
969 }
970
971 static void assert_pch_refclk_enabled(struct drm_i915_private *dev_priv)
972 {
973 u32 val;
974 bool enabled;
975
976 val = I915_READ(PCH_DREF_CONTROL);
977 enabled = !!(val & (DREF_SSC_SOURCE_MASK | DREF_NONSPREAD_SOURCE_MASK |
978 DREF_SUPERSPREAD_SOURCE_MASK));
979 WARN(!enabled, "PCH refclk assertion failure, should be active but is disabled\n");
980 }
981
982 static void assert_transcoder_disabled(struct drm_i915_private *dev_priv,
983 enum pipe pipe)
984 {
985 int reg;
986 u32 val;
987 bool enabled;
988
989 reg = TRANSCONF(pipe);
990 val = I915_READ(reg);
991 enabled = !!(val & TRANS_ENABLE);
992 WARN(enabled,
993 "transcoder assertion failed, should be off on pipe %c but is still active\n",
994 pipe_name(pipe));
995 }
996
997 static bool dp_pipe_enabled(struct drm_i915_private *dev_priv,
998 enum pipe pipe, u32 port_sel, u32 val)
999 {
1000 if ((val & DP_PORT_EN) == 0)
1001 return false;
1002
1003 if (HAS_PCH_CPT(dev_priv->dev)) {
1004 u32 trans_dp_ctl_reg = TRANS_DP_CTL(pipe);
1005 u32 trans_dp_ctl = I915_READ(trans_dp_ctl_reg);
1006 if ((trans_dp_ctl & TRANS_DP_PORT_SEL_MASK) != port_sel)
1007 return false;
1008 } else {
1009 if ((val & DP_PIPE_MASK) != (pipe << 30))
1010 return false;
1011 }
1012 return true;
1013 }
1014
1015 static bool hdmi_pipe_enabled(struct drm_i915_private *dev_priv,
1016 enum pipe pipe, u32 val)
1017 {
1018 if ((val & PORT_ENABLE) == 0)
1019 return false;
1020
1021 if (HAS_PCH_CPT(dev_priv->dev)) {
1022 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1023 return false;
1024 } else {
1025 if ((val & TRANSCODER_MASK) != TRANSCODER(pipe))
1026 return false;
1027 }
1028 return true;
1029 }
1030
1031 static bool lvds_pipe_enabled(struct drm_i915_private *dev_priv,
1032 enum pipe pipe, u32 val)
1033 {
1034 if ((val & LVDS_PORT_EN) == 0)
1035 return false;
1036
1037 if (HAS_PCH_CPT(dev_priv->dev)) {
1038 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1039 return false;
1040 } else {
1041 if ((val & LVDS_PIPE_MASK) != LVDS_PIPE(pipe))
1042 return false;
1043 }
1044 return true;
1045 }
1046
1047 static bool adpa_pipe_enabled(struct drm_i915_private *dev_priv,
1048 enum pipe pipe, u32 val)
1049 {
1050 if ((val & ADPA_DAC_ENABLE) == 0)
1051 return false;
1052 if (HAS_PCH_CPT(dev_priv->dev)) {
1053 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1054 return false;
1055 } else {
1056 if ((val & ADPA_PIPE_SELECT_MASK) != ADPA_PIPE_SELECT(pipe))
1057 return false;
1058 }
1059 return true;
1060 }
1061
1062 static void assert_pch_dp_disabled(struct drm_i915_private *dev_priv,
1063 enum pipe pipe, int reg, u32 port_sel)
1064 {
1065 u32 val = I915_READ(reg);
1066 WARN(dp_pipe_enabled(dev_priv, pipe, port_sel, val),
1067 "PCH DP (0x%08x) enabled on transcoder %c, should be disabled\n",
1068 reg, pipe_name(pipe));
1069 }
1070
1071 static void assert_pch_hdmi_disabled(struct drm_i915_private *dev_priv,
1072 enum pipe pipe, int reg)
1073 {
1074 u32 val = I915_READ(reg);
1075 WARN(hdmi_pipe_enabled(dev_priv, val, pipe),
1076 "PCH DP (0x%08x) enabled on transcoder %c, should be disabled\n",
1077 reg, pipe_name(pipe));
1078 }
1079
1080 static void assert_pch_ports_disabled(struct drm_i915_private *dev_priv,
1081 enum pipe pipe)
1082 {
1083 int reg;
1084 u32 val;
1085
1086 assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_B, TRANS_DP_PORT_SEL_B);
1087 assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_C, TRANS_DP_PORT_SEL_C);
1088 assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_D, TRANS_DP_PORT_SEL_D);
1089
1090 reg = PCH_ADPA;
1091 val = I915_READ(reg);
1092 WARN(adpa_pipe_enabled(dev_priv, val, pipe),
1093 "PCH VGA enabled on transcoder %c, should be disabled\n",
1094 pipe_name(pipe));
1095
1096 reg = PCH_LVDS;
1097 val = I915_READ(reg);
1098 WARN(lvds_pipe_enabled(dev_priv, val, pipe),
1099 "PCH LVDS enabled on transcoder %c, should be disabled\n",
1100 pipe_name(pipe));
1101
1102 assert_pch_hdmi_disabled(dev_priv, pipe, HDMIB);
1103 assert_pch_hdmi_disabled(dev_priv, pipe, HDMIC);
1104 assert_pch_hdmi_disabled(dev_priv, pipe, HDMID);
1105 }
1106
1107 /**
1108 * intel_enable_pll - enable a PLL
1109 * @dev_priv: i915 private structure
1110 * @pipe: pipe PLL to enable
1111 *
1112 * Enable @pipe's PLL so we can start pumping pixels from a plane. Check to
1113 * make sure the PLL reg is writable first though, since the panel write
1114 * protect mechanism may be enabled.
1115 *
1116 * Note! This is for pre-ILK only.
1117 */
1118 static void intel_enable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1119 {
1120 int reg;
1121 u32 val;
1122
1123 /* No really, not for ILK+ */
1124 BUG_ON(dev_priv->info->gen >= 5);
1125
1126 /* PLL is protected by panel, make sure we can write it */
1127 if (IS_MOBILE(dev_priv->dev) && !IS_I830(dev_priv->dev))
1128 assert_panel_unlocked(dev_priv, pipe);
1129
1130 reg = DPLL(pipe);
1131 val = I915_READ(reg);
1132 val |= DPLL_VCO_ENABLE;
1133
1134 /* We do this three times for luck */
1135 I915_WRITE(reg, val);
1136 POSTING_READ(reg);
1137 udelay(150); /* wait for warmup */
1138 I915_WRITE(reg, val);
1139 POSTING_READ(reg);
1140 udelay(150); /* wait for warmup */
1141 I915_WRITE(reg, val);
1142 POSTING_READ(reg);
1143 udelay(150); /* wait for warmup */
1144 }
1145
1146 /**
1147 * intel_disable_pll - disable a PLL
1148 * @dev_priv: i915 private structure
1149 * @pipe: pipe PLL to disable
1150 *
1151 * Disable the PLL for @pipe, making sure the pipe is off first.
1152 *
1153 * Note! This is for pre-ILK only.
1154 */
1155 static void intel_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1156 {
1157 int reg;
1158 u32 val;
1159
1160 /* Don't disable pipe A or pipe A PLLs if needed */
1161 if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
1162 return;
1163
1164 /* Make sure the pipe isn't still relying on us */
1165 assert_pipe_disabled(dev_priv, pipe);
1166
1167 reg = DPLL(pipe);
1168 val = I915_READ(reg);
1169 val &= ~DPLL_VCO_ENABLE;
1170 I915_WRITE(reg, val);
1171 POSTING_READ(reg);
1172 }
1173
1174 /**
1175 * intel_enable_pch_pll - enable PCH PLL
1176 * @dev_priv: i915 private structure
1177 * @pipe: pipe PLL to enable
1178 *
1179 * The PCH PLL needs to be enabled before the PCH transcoder, since it
1180 * drives the transcoder clock.
1181 */
1182 static void intel_enable_pch_pll(struct drm_i915_private *dev_priv,
1183 enum pipe pipe)
1184 {
1185 int reg;
1186 u32 val;
1187
1188 if (pipe > 1)
1189 return;
1190
1191 /* PCH only available on ILK+ */
1192 BUG_ON(dev_priv->info->gen < 5);
1193
1194 /* PCH refclock must be enabled first */
1195 assert_pch_refclk_enabled(dev_priv);
1196
1197 reg = PCH_DPLL(pipe);
1198 val = I915_READ(reg);
1199 val |= DPLL_VCO_ENABLE;
1200 I915_WRITE(reg, val);
1201 POSTING_READ(reg);
1202 udelay(200);
1203 }
1204
1205 static void intel_disable_pch_pll(struct drm_i915_private *dev_priv,
1206 enum pipe pipe)
1207 {
1208 int reg;
1209 u32 val;
1210
1211 if (pipe > 1)
1212 return;
1213
1214 /* PCH only available on ILK+ */
1215 BUG_ON(dev_priv->info->gen < 5);
1216
1217 /* Make sure transcoder isn't still depending on us */
1218 assert_transcoder_disabled(dev_priv, pipe);
1219
1220 reg = PCH_DPLL(pipe);
1221 val = I915_READ(reg);
1222 val &= ~DPLL_VCO_ENABLE;
1223 I915_WRITE(reg, val);
1224 POSTING_READ(reg);
1225 udelay(200);
1226 }
1227
1228 static void intel_enable_transcoder(struct drm_i915_private *dev_priv,
1229 enum pipe pipe)
1230 {
1231 int reg;
1232 u32 val;
1233
1234 /* PCH only available on ILK+ */
1235 BUG_ON(dev_priv->info->gen < 5);
1236
1237 /* Make sure PCH DPLL is enabled */
1238 assert_pch_pll_enabled(dev_priv, pipe);
1239
1240 /* FDI must be feeding us bits for PCH ports */
1241 assert_fdi_tx_enabled(dev_priv, pipe);
1242 assert_fdi_rx_enabled(dev_priv, pipe);
1243
1244 reg = TRANSCONF(pipe);
1245 val = I915_READ(reg);
1246
1247 if (HAS_PCH_IBX(dev_priv->dev)) {
1248 /*
1249 * make the BPC in transcoder be consistent with
1250 * that in pipeconf reg.
1251 */
1252 val &= ~PIPE_BPC_MASK;
1253 val |= I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK;
1254 }
1255 I915_WRITE(reg, val | TRANS_ENABLE);
1256 if (wait_for(I915_READ(reg) & TRANS_STATE_ENABLE, 100))
1257 DRM_ERROR("failed to enable transcoder %d\n", pipe);
1258 }
1259
1260 static void intel_disable_transcoder(struct drm_i915_private *dev_priv,
1261 enum pipe pipe)
1262 {
1263 int reg;
1264 u32 val;
1265
1266 /* FDI relies on the transcoder */
1267 assert_fdi_tx_disabled(dev_priv, pipe);
1268 assert_fdi_rx_disabled(dev_priv, pipe);
1269
1270 /* Ports must be off as well */
1271 assert_pch_ports_disabled(dev_priv, pipe);
1272
1273 reg = TRANSCONF(pipe);
1274 val = I915_READ(reg);
1275 val &= ~TRANS_ENABLE;
1276 I915_WRITE(reg, val);
1277 /* wait for PCH transcoder off, transcoder state */
1278 if (wait_for((I915_READ(reg) & TRANS_STATE_ENABLE) == 0, 50))
1279 DRM_ERROR("failed to disable transcoder %d\n", pipe);
1280 }
1281
1282 /**
1283 * intel_enable_pipe - enable a pipe, asserting requirements
1284 * @dev_priv: i915 private structure
1285 * @pipe: pipe to enable
1286 * @pch_port: on ILK+, is this pipe driving a PCH port or not
1287 *
1288 * Enable @pipe, making sure that various hardware specific requirements
1289 * are met, if applicable, e.g. PLL enabled, LVDS pairs enabled, etc.
1290 *
1291 * @pipe should be %PIPE_A or %PIPE_B.
1292 *
1293 * Will wait until the pipe is actually running (i.e. first vblank) before
1294 * returning.
1295 */
1296 static void intel_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe,
1297 bool pch_port)
1298 {
1299 int reg;
1300 u32 val;
1301
1302 /*
1303 * A pipe without a PLL won't actually be able to drive bits from
1304 * a plane. On ILK+ the pipe PLLs are integrated, so we don't
1305 * need the check.
1306 */
1307 if (!HAS_PCH_SPLIT(dev_priv->dev))
1308 assert_pll_enabled(dev_priv, pipe);
1309 else {
1310 if (pch_port) {
1311 /* if driving the PCH, we need FDI enabled */
1312 assert_fdi_rx_pll_enabled(dev_priv, pipe);
1313 assert_fdi_tx_pll_enabled(dev_priv, pipe);
1314 }
1315 /* FIXME: assert CPU port conditions for SNB+ */
1316 }
1317
1318 reg = PIPECONF(pipe);
1319 val = I915_READ(reg);
1320 if (val & PIPECONF_ENABLE)
1321 return;
1322
1323 I915_WRITE(reg, val | PIPECONF_ENABLE);
1324 intel_wait_for_vblank(dev_priv->dev, pipe);
1325 }
1326
1327 /**
1328 * intel_disable_pipe - disable a pipe, asserting requirements
1329 * @dev_priv: i915 private structure
1330 * @pipe: pipe to disable
1331 *
1332 * Disable @pipe, making sure that various hardware specific requirements
1333 * are met, if applicable, e.g. plane disabled, panel fitter off, etc.
1334 *
1335 * @pipe should be %PIPE_A or %PIPE_B.
1336 *
1337 * Will wait until the pipe has shut down before returning.
1338 */
1339 static void intel_disable_pipe(struct drm_i915_private *dev_priv,
1340 enum pipe pipe)
1341 {
1342 int reg;
1343 u32 val;
1344
1345 /*
1346 * Make sure planes won't keep trying to pump pixels to us,
1347 * or we might hang the display.
1348 */
1349 assert_planes_disabled(dev_priv, pipe);
1350
1351 /* Don't disable pipe A or pipe A PLLs if needed */
1352 if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
1353 return;
1354
1355 reg = PIPECONF(pipe);
1356 val = I915_READ(reg);
1357 if ((val & PIPECONF_ENABLE) == 0)
1358 return;
1359
1360 I915_WRITE(reg, val & ~PIPECONF_ENABLE);
1361 intel_wait_for_pipe_off(dev_priv->dev, pipe);
1362 }
1363
1364 /*
1365 * Plane regs are double buffered, going from enabled->disabled needs a
1366 * trigger in order to latch. The display address reg provides this.
1367 */
1368 static void intel_flush_display_plane(struct drm_i915_private *dev_priv,
1369 enum plane plane)
1370 {
1371 I915_WRITE(DSPADDR(plane), I915_READ(DSPADDR(plane)));
1372 I915_WRITE(DSPSURF(plane), I915_READ(DSPSURF(plane)));
1373 }
1374
1375 /**
1376 * intel_enable_plane - enable a display plane on a given pipe
1377 * @dev_priv: i915 private structure
1378 * @plane: plane to enable
1379 * @pipe: pipe being fed
1380 *
1381 * Enable @plane on @pipe, making sure that @pipe is running first.
1382 */
1383 static void intel_enable_plane(struct drm_i915_private *dev_priv,
1384 enum plane plane, enum pipe pipe)
1385 {
1386 int reg;
1387 u32 val;
1388
1389 /* If the pipe isn't enabled, we can't pump pixels and may hang */
1390 assert_pipe_enabled(dev_priv, pipe);
1391
1392 reg = DSPCNTR(plane);
1393 val = I915_READ(reg);
1394 if (val & DISPLAY_PLANE_ENABLE)
1395 return;
1396
1397 I915_WRITE(reg, val | DISPLAY_PLANE_ENABLE);
1398 intel_flush_display_plane(dev_priv, plane);
1399 intel_wait_for_vblank(dev_priv->dev, pipe);
1400 }
1401
1402 /**
1403 * intel_disable_plane - disable a display plane
1404 * @dev_priv: i915 private structure
1405 * @plane: plane to disable
1406 * @pipe: pipe consuming the data
1407 *
1408 * Disable @plane; should be an independent operation.
1409 */
1410 static void intel_disable_plane(struct drm_i915_private *dev_priv,
1411 enum plane plane, enum pipe pipe)
1412 {
1413 int reg;
1414 u32 val;
1415
1416 reg = DSPCNTR(plane);
1417 val = I915_READ(reg);
1418 if ((val & DISPLAY_PLANE_ENABLE) == 0)
1419 return;
1420
1421 I915_WRITE(reg, val & ~DISPLAY_PLANE_ENABLE);
1422 intel_flush_display_plane(dev_priv, plane);
1423 intel_wait_for_vblank(dev_priv->dev, pipe);
1424 }
1425
1426 static void disable_pch_dp(struct drm_i915_private *dev_priv,
1427 enum pipe pipe, int reg, u32 port_sel)
1428 {
1429 u32 val = I915_READ(reg);
1430 if (dp_pipe_enabled(dev_priv, pipe, port_sel, val)) {
1431 DRM_DEBUG_KMS("Disabling pch dp %x on pipe %d\n", reg, pipe);
1432 I915_WRITE(reg, val & ~DP_PORT_EN);
1433 }
1434 }
1435
1436 static void disable_pch_hdmi(struct drm_i915_private *dev_priv,
1437 enum pipe pipe, int reg)
1438 {
1439 u32 val = I915_READ(reg);
1440 if (hdmi_pipe_enabled(dev_priv, val, pipe)) {
1441 DRM_DEBUG_KMS("Disabling pch HDMI %x on pipe %d\n",
1442 reg, pipe);
1443 I915_WRITE(reg, val & ~PORT_ENABLE);
1444 }
1445 }
1446
1447 /* Disable any ports connected to this transcoder */
1448 static void intel_disable_pch_ports(struct drm_i915_private *dev_priv,
1449 enum pipe pipe)
1450 {
1451 u32 reg, val;
1452
1453 val = I915_READ(PCH_PP_CONTROL);
1454 I915_WRITE(PCH_PP_CONTROL, val | PANEL_UNLOCK_REGS);
1455
1456 disable_pch_dp(dev_priv, pipe, PCH_DP_B, TRANS_DP_PORT_SEL_B);
1457 disable_pch_dp(dev_priv, pipe, PCH_DP_C, TRANS_DP_PORT_SEL_C);
1458 disable_pch_dp(dev_priv, pipe, PCH_DP_D, TRANS_DP_PORT_SEL_D);
1459
1460 reg = PCH_ADPA;
1461 val = I915_READ(reg);
1462 if (adpa_pipe_enabled(dev_priv, val, pipe))
1463 I915_WRITE(reg, val & ~ADPA_DAC_ENABLE);
1464
1465 reg = PCH_LVDS;
1466 val = I915_READ(reg);
1467 if (lvds_pipe_enabled(dev_priv, val, pipe)) {
1468 DRM_DEBUG_KMS("disable lvds on pipe %d val 0x%08x\n", pipe, val);
1469 I915_WRITE(reg, val & ~LVDS_PORT_EN);
1470 POSTING_READ(reg);
1471 udelay(100);
1472 }
1473
1474 disable_pch_hdmi(dev_priv, pipe, HDMIB);
1475 disable_pch_hdmi(dev_priv, pipe, HDMIC);
1476 disable_pch_hdmi(dev_priv, pipe, HDMID);
1477 }
1478
1479 static void i8xx_disable_fbc(struct drm_device *dev)
1480 {
1481 struct drm_i915_private *dev_priv = dev->dev_private;
1482 u32 fbc_ctl;
1483
1484 /* Disable compression */
1485 fbc_ctl = I915_READ(FBC_CONTROL);
1486 if ((fbc_ctl & FBC_CTL_EN) == 0)
1487 return;
1488
1489 fbc_ctl &= ~FBC_CTL_EN;
1490 I915_WRITE(FBC_CONTROL, fbc_ctl);
1491
1492 /* Wait for compressing bit to clear */
1493 if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) {
1494 DRM_DEBUG_KMS("FBC idle timed out\n");
1495 return;
1496 }
1497
1498 DRM_DEBUG_KMS("disabled FBC\n");
1499 }
1500
1501 static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
1502 {
1503 struct drm_device *dev = crtc->dev;
1504 struct drm_i915_private *dev_priv = dev->dev_private;
1505 struct drm_framebuffer *fb = crtc->fb;
1506 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
1507 struct drm_i915_gem_object *obj = intel_fb->obj;
1508 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1509 int cfb_pitch;
1510 int plane, i;
1511 u32 fbc_ctl, fbc_ctl2;
1512
1513 cfb_pitch = dev_priv->cfb_size / FBC_LL_SIZE;
1514 if (fb->pitches[0] < cfb_pitch)
1515 cfb_pitch = fb->pitches[0];
1516
1517 /* FBC_CTL wants 64B units */
1518 cfb_pitch = (cfb_pitch / 64) - 1;
1519 plane = intel_crtc->plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB;
1520
1521 /* Clear old tags */
1522 for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)
1523 I915_WRITE(FBC_TAG + (i * 4), 0);
1524
1525 /* Set it up... */
1526 fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE;
1527 fbc_ctl2 |= plane;
1528 I915_WRITE(FBC_CONTROL2, fbc_ctl2);
1529 I915_WRITE(FBC_FENCE_OFF, crtc->y);
1530
1531 /* enable it... */
1532 fbc_ctl = FBC_CTL_EN | FBC_CTL_PERIODIC;
1533 if (IS_I945GM(dev))
1534 fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
1535 fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
1536 fbc_ctl |= (interval & 0x2fff) << FBC_CTL_INTERVAL_SHIFT;
1537 fbc_ctl |= obj->fence_reg;
1538 I915_WRITE(FBC_CONTROL, fbc_ctl);
1539
1540 DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %d, ",
1541 cfb_pitch, crtc->y, intel_crtc->plane);
1542 }
1543
1544 static bool i8xx_fbc_enabled(struct drm_device *dev)
1545 {
1546 struct drm_i915_private *dev_priv = dev->dev_private;
1547
1548 return I915_READ(FBC_CONTROL) & FBC_CTL_EN;
1549 }
1550
1551 static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
1552 {
1553 struct drm_device *dev = crtc->dev;
1554 struct drm_i915_private *dev_priv = dev->dev_private;
1555 struct drm_framebuffer *fb = crtc->fb;
1556 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
1557 struct drm_i915_gem_object *obj = intel_fb->obj;
1558 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1559 int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
1560 unsigned long stall_watermark = 200;
1561 u32 dpfc_ctl;
1562
1563 dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X;
1564 dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg;
1565 I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY);
1566
1567 I915_WRITE(DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
1568 (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
1569 (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
1570 I915_WRITE(DPFC_FENCE_YOFF, crtc->y);
1571
1572 /* enable it... */
1573 I915_WRITE(DPFC_CONTROL, I915_READ(DPFC_CONTROL) | DPFC_CTL_EN);
1574
1575 DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
1576 }
1577
1578 static void g4x_disable_fbc(struct drm_device *dev)
1579 {
1580 struct drm_i915_private *dev_priv = dev->dev_private;
1581 u32 dpfc_ctl;
1582
1583 /* Disable compression */
1584 dpfc_ctl = I915_READ(DPFC_CONTROL);
1585 if (dpfc_ctl & DPFC_CTL_EN) {
1586 dpfc_ctl &= ~DPFC_CTL_EN;
1587 I915_WRITE(DPFC_CONTROL, dpfc_ctl);
1588
1589 DRM_DEBUG_KMS("disabled FBC\n");
1590 }
1591 }
1592
1593 static bool g4x_fbc_enabled(struct drm_device *dev)
1594 {
1595 struct drm_i915_private *dev_priv = dev->dev_private;
1596
1597 return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN;
1598 }
1599
1600 static void sandybridge_blit_fbc_update(struct drm_device *dev)
1601 {
1602 struct drm_i915_private *dev_priv = dev->dev_private;
1603 u32 blt_ecoskpd;
1604
1605 /* Make sure blitter notifies FBC of writes */
1606 gen6_gt_force_wake_get(dev_priv);
1607 blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD);
1608 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY <<
1609 GEN6_BLITTER_LOCK_SHIFT;
1610 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
1611 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY;
1612 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
1613 blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY <<
1614 GEN6_BLITTER_LOCK_SHIFT);
1615 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
1616 POSTING_READ(GEN6_BLITTER_ECOSKPD);
1617 gen6_gt_force_wake_put(dev_priv);
1618 }
1619
1620 static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
1621 {
1622 struct drm_device *dev = crtc->dev;
1623 struct drm_i915_private *dev_priv = dev->dev_private;
1624 struct drm_framebuffer *fb = crtc->fb;
1625 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
1626 struct drm_i915_gem_object *obj = intel_fb->obj;
1627 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1628 int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
1629 unsigned long stall_watermark = 200;
1630 u32 dpfc_ctl;
1631
1632 dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
1633 dpfc_ctl &= DPFC_RESERVED;
1634 dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X);
1635 /* Set persistent mode for front-buffer rendering, ala X. */
1636 dpfc_ctl |= DPFC_CTL_PERSISTENT_MODE;
1637 dpfc_ctl |= (DPFC_CTL_FENCE_EN | obj->fence_reg);
1638 I915_WRITE(ILK_DPFC_CHICKEN, DPFC_HT_MODIFY);
1639
1640 I915_WRITE(ILK_DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
1641 (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
1642 (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
1643 I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y);
1644 I915_WRITE(ILK_FBC_RT_BASE, obj->gtt_offset | ILK_FBC_RT_VALID);
1645 /* enable it... */
1646 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
1647
1648 if (IS_GEN6(dev)) {
1649 I915_WRITE(SNB_DPFC_CTL_SA,
1650 SNB_CPU_FENCE_ENABLE | obj->fence_reg);
1651 I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
1652 sandybridge_blit_fbc_update(dev);
1653 }
1654
1655 DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
1656 }
1657
1658 static void ironlake_disable_fbc(struct drm_device *dev)
1659 {
1660 struct drm_i915_private *dev_priv = dev->dev_private;
1661 u32 dpfc_ctl;
1662
1663 /* Disable compression */
1664 dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
1665 if (dpfc_ctl & DPFC_CTL_EN) {
1666 dpfc_ctl &= ~DPFC_CTL_EN;
1667 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);
1668
1669 DRM_DEBUG_KMS("disabled FBC\n");
1670 }
1671 }
1672
1673 static bool ironlake_fbc_enabled(struct drm_device *dev)
1674 {
1675 struct drm_i915_private *dev_priv = dev->dev_private;
1676
1677 return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
1678 }
1679
1680 bool intel_fbc_enabled(struct drm_device *dev)
1681 {
1682 struct drm_i915_private *dev_priv = dev->dev_private;
1683
1684 if (!dev_priv->display.fbc_enabled)
1685 return false;
1686
1687 return dev_priv->display.fbc_enabled(dev);
1688 }
1689
1690 static void intel_fbc_work_fn(struct work_struct *__work)
1691 {
1692 struct intel_fbc_work *work =
1693 container_of(to_delayed_work(__work),
1694 struct intel_fbc_work, work);
1695 struct drm_device *dev = work->crtc->dev;
1696 struct drm_i915_private *dev_priv = dev->dev_private;
1697
1698 mutex_lock(&dev->struct_mutex);
1699 if (work == dev_priv->fbc_work) {
1700 /* Double check that we haven't switched fb without cancelling
1701 * the prior work.
1702 */
1703 if (work->crtc->fb == work->fb) {
1704 dev_priv->display.enable_fbc(work->crtc,
1705 work->interval);
1706
1707 dev_priv->cfb_plane = to_intel_crtc(work->crtc)->plane;
1708 dev_priv->cfb_fb = work->crtc->fb->base.id;
1709 dev_priv->cfb_y = work->crtc->y;
1710 }
1711
1712 dev_priv->fbc_work = NULL;
1713 }
1714 mutex_unlock(&dev->struct_mutex);
1715
1716 kfree(work);
1717 }
1718
1719 static void intel_cancel_fbc_work(struct drm_i915_private *dev_priv)
1720 {
1721 if (dev_priv->fbc_work == NULL)
1722 return;
1723
1724 DRM_DEBUG_KMS("cancelling pending FBC enable\n");
1725
1726 /* Synchronisation is provided by struct_mutex and checking of
1727 * dev_priv->fbc_work, so we can perform the cancellation
1728 * entirely asynchronously.
1729 */
1730 if (cancel_delayed_work(&dev_priv->fbc_work->work))
1731 /* tasklet was killed before being run, clean up */
1732 kfree(dev_priv->fbc_work);
1733
1734 /* Mark the work as no longer wanted so that if it does
1735 * wake-up (because the work was already running and waiting
1736 * for our mutex), it will discover that is no longer
1737 * necessary to run.
1738 */
1739 dev_priv->fbc_work = NULL;
1740 }
1741
1742 static void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
1743 {
1744 struct intel_fbc_work *work;
1745 struct drm_device *dev = crtc->dev;
1746 struct drm_i915_private *dev_priv = dev->dev_private;
1747
1748 if (!dev_priv->display.enable_fbc)
1749 return;
1750
1751 intel_cancel_fbc_work(dev_priv);
1752
1753 work = kzalloc(sizeof *work, GFP_KERNEL);
1754 if (work == NULL) {
1755 dev_priv->display.enable_fbc(crtc, interval);
1756 return;
1757 }
1758
1759 work->crtc = crtc;
1760 work->fb = crtc->fb;
1761 work->interval = interval;
1762 INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn);
1763
1764 dev_priv->fbc_work = work;
1765
1766 DRM_DEBUG_KMS("scheduling delayed FBC enable\n");
1767
1768 /* Delay the actual enabling to let pageflipping cease and the
1769 * display to settle before starting the compression. Note that
1770 * this delay also serves a second purpose: it allows for a
1771 * vblank to pass after disabling the FBC before we attempt
1772 * to modify the control registers.
1773 *
1774 * A more complicated solution would involve tracking vblanks
1775 * following the termination of the page-flipping sequence
1776 * and indeed performing the enable as a co-routine and not
1777 * waiting synchronously upon the vblank.
1778 */
1779 schedule_delayed_work(&work->work, msecs_to_jiffies(50));
1780 }
1781
1782 void intel_disable_fbc(struct drm_device *dev)
1783 {
1784 struct drm_i915_private *dev_priv = dev->dev_private;
1785
1786 intel_cancel_fbc_work(dev_priv);
1787
1788 if (!dev_priv->display.disable_fbc)
1789 return;
1790
1791 dev_priv->display.disable_fbc(dev);
1792 dev_priv->cfb_plane = -1;
1793 }
1794
1795 /**
1796 * intel_update_fbc - enable/disable FBC as needed
1797 * @dev: the drm_device
1798 *
1799 * Set up the framebuffer compression hardware at mode set time. We
1800 * enable it if possible:
1801 * - plane A only (on pre-965)
1802 * - no pixel mulitply/line duplication
1803 * - no alpha buffer discard
1804 * - no dual wide
1805 * - framebuffer <= 2048 in width, 1536 in height
1806 *
1807 * We can't assume that any compression will take place (worst case),
1808 * so the compressed buffer has to be the same size as the uncompressed
1809 * one. It also must reside (along with the line length buffer) in
1810 * stolen memory.
1811 *
1812 * We need to enable/disable FBC on a global basis.
1813 */
1814 static void intel_update_fbc(struct drm_device *dev)
1815 {
1816 struct drm_i915_private *dev_priv = dev->dev_private;
1817 struct drm_crtc *crtc = NULL, *tmp_crtc;
1818 struct intel_crtc *intel_crtc;
1819 struct drm_framebuffer *fb;
1820 struct intel_framebuffer *intel_fb;
1821 struct drm_i915_gem_object *obj;
1822 int enable_fbc;
1823
1824 DRM_DEBUG_KMS("\n");
1825
1826 if (!i915_powersave)
1827 return;
1828
1829 if (!I915_HAS_FBC(dev))
1830 return;
1831
1832 /*
1833 * If FBC is already on, we just have to verify that we can
1834 * keep it that way...
1835 * Need to disable if:
1836 * - more than one pipe is active
1837 * - changing FBC params (stride, fence, mode)
1838 * - new fb is too large to fit in compressed buffer
1839 * - going to an unsupported config (interlace, pixel multiply, etc.)
1840 */
1841 list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) {
1842 if (tmp_crtc->enabled && tmp_crtc->fb) {
1843 if (crtc) {
1844 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
1845 dev_priv->no_fbc_reason = FBC_MULTIPLE_PIPES;
1846 goto out_disable;
1847 }
1848 crtc = tmp_crtc;
1849 }
1850 }
1851
1852 if (!crtc || crtc->fb == NULL) {
1853 DRM_DEBUG_KMS("no output, disabling\n");
1854 dev_priv->no_fbc_reason = FBC_NO_OUTPUT;
1855 goto out_disable;
1856 }
1857
1858 intel_crtc = to_intel_crtc(crtc);
1859 fb = crtc->fb;
1860 intel_fb = to_intel_framebuffer(fb);
1861 obj = intel_fb->obj;
1862
1863 enable_fbc = i915_enable_fbc;
1864 if (enable_fbc < 0) {
1865 DRM_DEBUG_KMS("fbc set to per-chip default\n");
1866 enable_fbc = 1;
1867 if (INTEL_INFO(dev)->gen <= 5)
1868 enable_fbc = 0;
1869 }
1870 if (!enable_fbc) {
1871 DRM_DEBUG_KMS("fbc disabled per module param\n");
1872 dev_priv->no_fbc_reason = FBC_MODULE_PARAM;
1873 goto out_disable;
1874 }
1875 if (intel_fb->obj->base.size > dev_priv->cfb_size) {
1876 DRM_DEBUG_KMS("framebuffer too large, disabling "
1877 "compression\n");
1878 dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1879 goto out_disable;
1880 }
1881 if ((crtc->mode.flags & DRM_MODE_FLAG_INTERLACE) ||
1882 (crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)) {
1883 DRM_DEBUG_KMS("mode incompatible with compression, "
1884 "disabling\n");
1885 dev_priv->no_fbc_reason = FBC_UNSUPPORTED_MODE;
1886 goto out_disable;
1887 }
1888 if ((crtc->mode.hdisplay > 2048) ||
1889 (crtc->mode.vdisplay > 1536)) {
1890 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
1891 dev_priv->no_fbc_reason = FBC_MODE_TOO_LARGE;
1892 goto out_disable;
1893 }
1894 if ((IS_I915GM(dev) || IS_I945GM(dev)) && intel_crtc->plane != 0) {
1895 DRM_DEBUG_KMS("plane not 0, disabling compression\n");
1896 dev_priv->no_fbc_reason = FBC_BAD_PLANE;
1897 goto out_disable;
1898 }
1899
1900 /* The use of a CPU fence is mandatory in order to detect writes
1901 * by the CPU to the scanout and trigger updates to the FBC.
1902 */
1903 if (obj->tiling_mode != I915_TILING_X ||
1904 obj->fence_reg == I915_FENCE_REG_NONE) {
1905 DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
1906 dev_priv->no_fbc_reason = FBC_NOT_TILED;
1907 goto out_disable;
1908 }
1909
1910 /* If the kernel debugger is active, always disable compression */
1911 if (in_dbg_master())
1912 goto out_disable;
1913
1914 /* If the scanout has not changed, don't modify the FBC settings.
1915 * Note that we make the fundamental assumption that the fb->obj
1916 * cannot be unpinned (and have its GTT offset and fence revoked)
1917 * without first being decoupled from the scanout and FBC disabled.
1918 */
1919 if (dev_priv->cfb_plane == intel_crtc->plane &&
1920 dev_priv->cfb_fb == fb->base.id &&
1921 dev_priv->cfb_y == crtc->y)
1922 return;
1923
1924 if (intel_fbc_enabled(dev)) {
1925 /* We update FBC along two paths, after changing fb/crtc
1926 * configuration (modeswitching) and after page-flipping
1927 * finishes. For the latter, we know that not only did
1928 * we disable the FBC at the start of the page-flip
1929 * sequence, but also more than one vblank has passed.
1930 *
1931 * For the former case of modeswitching, it is possible
1932 * to switch between two FBC valid configurations
1933 * instantaneously so we do need to disable the FBC
1934 * before we can modify its control registers. We also
1935 * have to wait for the next vblank for that to take
1936 * effect. However, since we delay enabling FBC we can
1937 * assume that a vblank has passed since disabling and
1938 * that we can safely alter the registers in the deferred
1939 * callback.
1940 *
1941 * In the scenario that we go from a valid to invalid
1942 * and then back to valid FBC configuration we have
1943 * no strict enforcement that a vblank occurred since
1944 * disabling the FBC. However, along all current pipe
1945 * disabling paths we do need to wait for a vblank at
1946 * some point. And we wait before enabling FBC anyway.
1947 */
1948 DRM_DEBUG_KMS("disabling active FBC for update\n");
1949 intel_disable_fbc(dev);
1950 }
1951
1952 intel_enable_fbc(crtc, 500);
1953 return;
1954
1955 out_disable:
1956 /* Multiple disables should be harmless */
1957 if (intel_fbc_enabled(dev)) {
1958 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
1959 intel_disable_fbc(dev);
1960 }
1961 }
1962
1963 int
1964 intel_pin_and_fence_fb_obj(struct drm_device *dev,
1965 struct drm_i915_gem_object *obj,
1966 struct intel_ring_buffer *pipelined)
1967 {
1968 struct drm_i915_private *dev_priv = dev->dev_private;
1969 u32 alignment;
1970 int ret;
1971
1972 switch (obj->tiling_mode) {
1973 case I915_TILING_NONE:
1974 if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1975 alignment = 128 * 1024;
1976 else if (INTEL_INFO(dev)->gen >= 4)
1977 alignment = 4 * 1024;
1978 else
1979 alignment = 64 * 1024;
1980 break;
1981 case I915_TILING_X:
1982 /* pin() will align the object as required by fence */
1983 alignment = 0;
1984 break;
1985 case I915_TILING_Y:
1986 /* FIXME: Is this true? */
1987 DRM_ERROR("Y tiled not allowed for scan out buffers\n");
1988 return -EINVAL;
1989 default:
1990 BUG();
1991 }
1992
1993 dev_priv->mm.interruptible = false;
1994 ret = i915_gem_object_pin_to_display_plane(obj, alignment, pipelined);
1995 if (ret)
1996 goto err_interruptible;
1997
1998 /* Install a fence for tiled scan-out. Pre-i965 always needs a
1999 * fence, whereas 965+ only requires a fence if using
2000 * framebuffer compression. For simplicity, we always install
2001 * a fence as the cost is not that onerous.
2002 */
2003 if (obj->tiling_mode != I915_TILING_NONE) {
2004 ret = i915_gem_object_get_fence(obj, pipelined);
2005 if (ret)
2006 goto err_unpin;
2007 }
2008
2009 dev_priv->mm.interruptible = true;
2010 return 0;
2011
2012 err_unpin:
2013 i915_gem_object_unpin(obj);
2014 err_interruptible:
2015 dev_priv->mm.interruptible = true;
2016 return ret;
2017 }
2018
2019 static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb,
2020 int x, int y)
2021 {
2022 struct drm_device *dev = crtc->dev;
2023 struct drm_i915_private *dev_priv = dev->dev_private;
2024 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2025 struct intel_framebuffer *intel_fb;
2026 struct drm_i915_gem_object *obj;
2027 int plane = intel_crtc->plane;
2028 unsigned long Start, Offset;
2029 u32 dspcntr;
2030 u32 reg;
2031
2032 switch (plane) {
2033 case 0:
2034 case 1:
2035 break;
2036 default:
2037 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
2038 return -EINVAL;
2039 }
2040
2041 intel_fb = to_intel_framebuffer(fb);
2042 obj = intel_fb->obj;
2043
2044 reg = DSPCNTR(plane);
2045 dspcntr = I915_READ(reg);
2046 /* Mask out pixel format bits in case we change it */
2047 dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
2048 switch (fb->bits_per_pixel) {
2049 case 8:
2050 dspcntr |= DISPPLANE_8BPP;
2051 break;
2052 case 16:
2053 if (fb->depth == 15)
2054 dspcntr |= DISPPLANE_15_16BPP;
2055 else
2056 dspcntr |= DISPPLANE_16BPP;
2057 break;
2058 case 24:
2059 case 32:
2060 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
2061 break;
2062 default:
2063 DRM_ERROR("Unknown color depth %d\n", fb->bits_per_pixel);
2064 return -EINVAL;
2065 }
2066 if (INTEL_INFO(dev)->gen >= 4) {
2067 if (obj->tiling_mode != I915_TILING_NONE)
2068 dspcntr |= DISPPLANE_TILED;
2069 else
2070 dspcntr &= ~DISPPLANE_TILED;
2071 }
2072
2073 I915_WRITE(reg, dspcntr);
2074
2075 Start = obj->gtt_offset;
2076 Offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
2077
2078 DRM_DEBUG_KMS("Writing base %08lX %08lX %d %d %d\n",
2079 Start, Offset, x, y, fb->pitches[0]);
2080 I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
2081 if (INTEL_INFO(dev)->gen >= 4) {
2082 I915_WRITE(DSPSURF(plane), Start);
2083 I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
2084 I915_WRITE(DSPADDR(plane), Offset);
2085 } else
2086 I915_WRITE(DSPADDR(plane), Start + Offset);
2087 POSTING_READ(reg);
2088
2089 return 0;
2090 }
2091
2092 static int ironlake_update_plane(struct drm_crtc *crtc,
2093 struct drm_framebuffer *fb, int x, int y)
2094 {
2095 struct drm_device *dev = crtc->dev;
2096 struct drm_i915_private *dev_priv = dev->dev_private;
2097 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2098 struct intel_framebuffer *intel_fb;
2099 struct drm_i915_gem_object *obj;
2100 int plane = intel_crtc->plane;
2101 unsigned long Start, Offset;
2102 u32 dspcntr;
2103 u32 reg;
2104
2105 switch (plane) {
2106 case 0:
2107 case 1:
2108 case 2:
2109 break;
2110 default:
2111 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
2112 return -EINVAL;
2113 }
2114
2115 intel_fb = to_intel_framebuffer(fb);
2116 obj = intel_fb->obj;
2117
2118 reg = DSPCNTR(plane);
2119 dspcntr = I915_READ(reg);
2120 /* Mask out pixel format bits in case we change it */
2121 dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
2122 switch (fb->bits_per_pixel) {
2123 case 8:
2124 dspcntr |= DISPPLANE_8BPP;
2125 break;
2126 case 16:
2127 if (fb->depth != 16)
2128 return -EINVAL;
2129
2130 dspcntr |= DISPPLANE_16BPP;
2131 break;
2132 case 24:
2133 case 32:
2134 if (fb->depth == 24)
2135 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
2136 else if (fb->depth == 30)
2137 dspcntr |= DISPPLANE_32BPP_30BIT_NO_ALPHA;
2138 else
2139 return -EINVAL;
2140 break;
2141 default:
2142 DRM_ERROR("Unknown color depth %d\n", fb->bits_per_pixel);
2143 return -EINVAL;
2144 }
2145
2146 if (obj->tiling_mode != I915_TILING_NONE)
2147 dspcntr |= DISPPLANE_TILED;
2148 else
2149 dspcntr &= ~DISPPLANE_TILED;
2150
2151 /* must disable */
2152 dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
2153
2154 I915_WRITE(reg, dspcntr);
2155
2156 Start = obj->gtt_offset;
2157 Offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
2158
2159 DRM_DEBUG_KMS("Writing base %08lX %08lX %d %d %d\n",
2160 Start, Offset, x, y, fb->pitches[0]);
2161 I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
2162 I915_WRITE(DSPSURF(plane), Start);
2163 I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
2164 I915_WRITE(DSPADDR(plane), Offset);
2165 POSTING_READ(reg);
2166
2167 return 0;
2168 }
2169
2170 /* Assume fb object is pinned & idle & fenced and just update base pointers */
2171 static int
2172 intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb,
2173 int x, int y, enum mode_set_atomic state)
2174 {
2175 struct drm_device *dev = crtc->dev;
2176 struct drm_i915_private *dev_priv = dev->dev_private;
2177 int ret;
2178
2179 ret = dev_priv->display.update_plane(crtc, fb, x, y);
2180 if (ret)
2181 return ret;
2182
2183 intel_update_fbc(dev);
2184 intel_increase_pllclock(crtc);
2185
2186 return 0;
2187 }
2188
2189 static int
2190 intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
2191 struct drm_framebuffer *old_fb)
2192 {
2193 struct drm_device *dev = crtc->dev;
2194 struct drm_i915_master_private *master_priv;
2195 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2196 int ret;
2197
2198 /* no fb bound */
2199 if (!crtc->fb) {
2200 DRM_ERROR("No FB bound\n");
2201 return 0;
2202 }
2203
2204 switch (intel_crtc->plane) {
2205 case 0:
2206 case 1:
2207 break;
2208 case 2:
2209 if (IS_IVYBRIDGE(dev))
2210 break;
2211 /* fall through otherwise */
2212 default:
2213 DRM_ERROR("no plane for crtc\n");
2214 return -EINVAL;
2215 }
2216
2217 mutex_lock(&dev->struct_mutex);
2218 ret = intel_pin_and_fence_fb_obj(dev,
2219 to_intel_framebuffer(crtc->fb)->obj,
2220 NULL);
2221 if (ret != 0) {
2222 mutex_unlock(&dev->struct_mutex);
2223 DRM_ERROR("pin & fence failed\n");
2224 return ret;
2225 }
2226
2227 if (old_fb) {
2228 struct drm_i915_private *dev_priv = dev->dev_private;
2229 struct drm_i915_gem_object *obj = to_intel_framebuffer(old_fb)->obj;
2230
2231 wait_event(dev_priv->pending_flip_queue,
2232 atomic_read(&dev_priv->mm.wedged) ||
2233 atomic_read(&obj->pending_flip) == 0);
2234
2235 /* Big Hammer, we also need to ensure that any pending
2236 * MI_WAIT_FOR_EVENT inside a user batch buffer on the
2237 * current scanout is retired before unpinning the old
2238 * framebuffer.
2239 *
2240 * This should only fail upon a hung GPU, in which case we
2241 * can safely continue.
2242 */
2243 ret = i915_gem_object_finish_gpu(obj);
2244 (void) ret;
2245 }
2246
2247 ret = intel_pipe_set_base_atomic(crtc, crtc->fb, x, y,
2248 LEAVE_ATOMIC_MODE_SET);
2249 if (ret) {
2250 i915_gem_object_unpin(to_intel_framebuffer(crtc->fb)->obj);
2251 mutex_unlock(&dev->struct_mutex);
2252 DRM_ERROR("failed to update base address\n");
2253 return ret;
2254 }
2255
2256 if (old_fb) {
2257 intel_wait_for_vblank(dev, intel_crtc->pipe);
2258 i915_gem_object_unpin(to_intel_framebuffer(old_fb)->obj);
2259 }
2260
2261 mutex_unlock(&dev->struct_mutex);
2262
2263 if (!dev->primary->master)
2264 return 0;
2265
2266 master_priv = dev->primary->master->driver_priv;
2267 if (!master_priv->sarea_priv)
2268 return 0;
2269
2270 if (intel_crtc->pipe) {
2271 master_priv->sarea_priv->pipeB_x = x;
2272 master_priv->sarea_priv->pipeB_y = y;
2273 } else {
2274 master_priv->sarea_priv->pipeA_x = x;
2275 master_priv->sarea_priv->pipeA_y = y;
2276 }
2277
2278 return 0;
2279 }
2280
2281 static void ironlake_set_pll_edp(struct drm_crtc *crtc, int clock)
2282 {
2283 struct drm_device *dev = crtc->dev;
2284 struct drm_i915_private *dev_priv = dev->dev_private;
2285 u32 dpa_ctl;
2286
2287 DRM_DEBUG_KMS("eDP PLL enable for clock %d\n", clock);
2288 dpa_ctl = I915_READ(DP_A);
2289 dpa_ctl &= ~DP_PLL_FREQ_MASK;
2290
2291 if (clock < 200000) {
2292 u32 temp;
2293 dpa_ctl |= DP_PLL_FREQ_160MHZ;
2294 /* workaround for 160Mhz:
2295 1) program 0x4600c bits 15:0 = 0x8124
2296 2) program 0x46010 bit 0 = 1
2297 3) program 0x46034 bit 24 = 1
2298 4) program 0x64000 bit 14 = 1
2299 */
2300 temp = I915_READ(0x4600c);
2301 temp &= 0xffff0000;
2302 I915_WRITE(0x4600c, temp | 0x8124);
2303
2304 temp = I915_READ(0x46010);
2305 I915_WRITE(0x46010, temp | 1);
2306
2307 temp = I915_READ(0x46034);
2308 I915_WRITE(0x46034, temp | (1 << 24));
2309 } else {
2310 dpa_ctl |= DP_PLL_FREQ_270MHZ;
2311 }
2312 I915_WRITE(DP_A, dpa_ctl);
2313
2314 POSTING_READ(DP_A);
2315 udelay(500);
2316 }
2317
2318 static void intel_fdi_normal_train(struct drm_crtc *crtc)
2319 {
2320 struct drm_device *dev = crtc->dev;
2321 struct drm_i915_private *dev_priv = dev->dev_private;
2322 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2323 int pipe = intel_crtc->pipe;
2324 u32 reg, temp;
2325
2326 /* enable normal train */
2327 reg = FDI_TX_CTL(pipe);
2328 temp = I915_READ(reg);
2329 if (IS_IVYBRIDGE(dev)) {
2330 temp &= ~FDI_LINK_TRAIN_NONE_IVB;
2331 temp |= FDI_LINK_TRAIN_NONE_IVB | FDI_TX_ENHANCE_FRAME_ENABLE;
2332 } else {
2333 temp &= ~FDI_LINK_TRAIN_NONE;
2334 temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
2335 }
2336 I915_WRITE(reg, temp);
2337
2338 reg = FDI_RX_CTL(pipe);
2339 temp = I915_READ(reg);
2340 if (HAS_PCH_CPT(dev)) {
2341 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2342 temp |= FDI_LINK_TRAIN_NORMAL_CPT;
2343 } else {
2344 temp &= ~FDI_LINK_TRAIN_NONE;
2345 temp |= FDI_LINK_TRAIN_NONE;
2346 }
2347 I915_WRITE(reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
2348
2349 /* wait one idle pattern time */
2350 POSTING_READ(reg);
2351 udelay(1000);
2352
2353 /* IVB wants error correction enabled */
2354 if (IS_IVYBRIDGE(dev))
2355 I915_WRITE(reg, I915_READ(reg) | FDI_FS_ERRC_ENABLE |
2356 FDI_FE_ERRC_ENABLE);
2357 }
2358
2359 static void cpt_phase_pointer_enable(struct drm_device *dev, int pipe)
2360 {
2361 struct drm_i915_private *dev_priv = dev->dev_private;
2362 u32 flags = I915_READ(SOUTH_CHICKEN1);
2363
2364 flags |= FDI_PHASE_SYNC_OVR(pipe);
2365 I915_WRITE(SOUTH_CHICKEN1, flags); /* once to unlock... */
2366 flags |= FDI_PHASE_SYNC_EN(pipe);
2367 I915_WRITE(SOUTH_CHICKEN1, flags); /* then again to enable */
2368 POSTING_READ(SOUTH_CHICKEN1);
2369 }
2370
2371 /* The FDI link training functions for ILK/Ibexpeak. */
2372 static void ironlake_fdi_link_train(struct drm_crtc *crtc)
2373 {
2374 struct drm_device *dev = crtc->dev;
2375 struct drm_i915_private *dev_priv = dev->dev_private;
2376 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2377 int pipe = intel_crtc->pipe;
2378 int plane = intel_crtc->plane;
2379 u32 reg, temp, tries;
2380
2381 /* FDI needs bits from pipe & plane first */
2382 assert_pipe_enabled(dev_priv, pipe);
2383 assert_plane_enabled(dev_priv, plane);
2384
2385 /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2386 for train result */
2387 reg = FDI_RX_IMR(pipe);
2388 temp = I915_READ(reg);
2389 temp &= ~FDI_RX_SYMBOL_LOCK;
2390 temp &= ~FDI_RX_BIT_LOCK;
2391 I915_WRITE(reg, temp);
2392 I915_READ(reg);
2393 udelay(150);
2394
2395 /* enable CPU FDI TX and PCH FDI RX */
2396 reg = FDI_TX_CTL(pipe);
2397 temp = I915_READ(reg);
2398 temp &= ~(7 << 19);
2399 temp |= (intel_crtc->fdi_lanes - 1) << 19;
2400 temp &= ~FDI_LINK_TRAIN_NONE;
2401 temp |= FDI_LINK_TRAIN_PATTERN_1;
2402 I915_WRITE(reg, temp | FDI_TX_ENABLE);
2403
2404 reg = FDI_RX_CTL(pipe);
2405 temp = I915_READ(reg);
2406 temp &= ~FDI_LINK_TRAIN_NONE;
2407 temp |= FDI_LINK_TRAIN_PATTERN_1;
2408 I915_WRITE(reg, temp | FDI_RX_ENABLE);
2409
2410 POSTING_READ(reg);
2411 udelay(150);
2412
2413 /* Ironlake workaround, enable clock pointer after FDI enable*/
2414 if (HAS_PCH_IBX(dev)) {
2415 I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
2416 I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR |
2417 FDI_RX_PHASE_SYNC_POINTER_EN);
2418 }
2419
2420 reg = FDI_RX_IIR(pipe);
2421 for (tries = 0; tries < 5; tries++) {
2422 temp = I915_READ(reg);
2423 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2424
2425 if ((temp & FDI_RX_BIT_LOCK)) {
2426 DRM_DEBUG_KMS("FDI train 1 done.\n");
2427 I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2428 break;
2429 }
2430 }
2431 if (tries == 5)
2432 DRM_ERROR("FDI train 1 fail!\n");
2433
2434 /* Train 2 */
2435 reg = FDI_TX_CTL(pipe);
2436 temp = I915_READ(reg);
2437 temp &= ~FDI_LINK_TRAIN_NONE;
2438 temp |= FDI_LINK_TRAIN_PATTERN_2;
2439 I915_WRITE(reg, temp);
2440
2441 reg = FDI_RX_CTL(pipe);
2442 temp = I915_READ(reg);
2443 temp &= ~FDI_LINK_TRAIN_NONE;
2444 temp |= FDI_LINK_TRAIN_PATTERN_2;
2445 I915_WRITE(reg, temp);
2446
2447 POSTING_READ(reg);
2448 udelay(150);
2449
2450 reg = FDI_RX_IIR(pipe);
2451 for (tries = 0; tries < 5; tries++) {
2452 temp = I915_READ(reg);
2453 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2454
2455 if (temp & FDI_RX_SYMBOL_LOCK) {
2456 I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2457 DRM_DEBUG_KMS("FDI train 2 done.\n");
2458 break;
2459 }
2460 }
2461 if (tries == 5)
2462 DRM_ERROR("FDI train 2 fail!\n");
2463
2464 DRM_DEBUG_KMS("FDI train done\n");
2465
2466 }
2467
2468 static const int snb_b_fdi_train_param[] = {
2469 FDI_LINK_TRAIN_400MV_0DB_SNB_B,
2470 FDI_LINK_TRAIN_400MV_6DB_SNB_B,
2471 FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
2472 FDI_LINK_TRAIN_800MV_0DB_SNB_B,
2473 };
2474
2475 /* The FDI link training functions for SNB/Cougarpoint. */
2476 static void gen6_fdi_link_train(struct drm_crtc *crtc)
2477 {
2478 struct drm_device *dev = crtc->dev;
2479 struct drm_i915_private *dev_priv = dev->dev_private;
2480 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2481 int pipe = intel_crtc->pipe;
2482 u32 reg, temp, i;
2483
2484 /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2485 for train result */
2486 reg = FDI_RX_IMR(pipe);
2487 temp = I915_READ(reg);
2488 temp &= ~FDI_RX_SYMBOL_LOCK;
2489 temp &= ~FDI_RX_BIT_LOCK;
2490 I915_WRITE(reg, temp);
2491
2492 POSTING_READ(reg);
2493 udelay(150);
2494
2495 /* enable CPU FDI TX and PCH FDI RX */
2496 reg = FDI_TX_CTL(pipe);
2497 temp = I915_READ(reg);
2498 temp &= ~(7 << 19);
2499 temp |= (intel_crtc->fdi_lanes - 1) << 19;
2500 temp &= ~FDI_LINK_TRAIN_NONE;
2501 temp |= FDI_LINK_TRAIN_PATTERN_1;
2502 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2503 /* SNB-B */
2504 temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2505 I915_WRITE(reg, temp | FDI_TX_ENABLE);
2506
2507 reg = FDI_RX_CTL(pipe);
2508 temp = I915_READ(reg);
2509 if (HAS_PCH_CPT(dev)) {
2510 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2511 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2512 } else {
2513 temp &= ~FDI_LINK_TRAIN_NONE;
2514 temp |= FDI_LINK_TRAIN_PATTERN_1;
2515 }
2516 I915_WRITE(reg, temp | FDI_RX_ENABLE);
2517
2518 POSTING_READ(reg);
2519 udelay(150);
2520
2521 if (HAS_PCH_CPT(dev))
2522 cpt_phase_pointer_enable(dev, pipe);
2523
2524 for (i = 0; i < 4; i++) {
2525 reg = FDI_TX_CTL(pipe);
2526 temp = I915_READ(reg);
2527 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2528 temp |= snb_b_fdi_train_param[i];
2529 I915_WRITE(reg, temp);
2530
2531 POSTING_READ(reg);
2532 udelay(500);
2533
2534 reg = FDI_RX_IIR(pipe);
2535 temp = I915_READ(reg);
2536 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2537
2538 if (temp & FDI_RX_BIT_LOCK) {
2539 I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2540 DRM_DEBUG_KMS("FDI train 1 done.\n");
2541 break;
2542 }
2543 }
2544 if (i == 4)
2545 DRM_ERROR("FDI train 1 fail!\n");
2546
2547 /* Train 2 */
2548 reg = FDI_TX_CTL(pipe);
2549 temp = I915_READ(reg);
2550 temp &= ~FDI_LINK_TRAIN_NONE;
2551 temp |= FDI_LINK_TRAIN_PATTERN_2;
2552 if (IS_GEN6(dev)) {
2553 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2554 /* SNB-B */
2555 temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2556 }
2557 I915_WRITE(reg, temp);
2558
2559 reg = FDI_RX_CTL(pipe);
2560 temp = I915_READ(reg);
2561 if (HAS_PCH_CPT(dev)) {
2562 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2563 temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
2564 } else {
2565 temp &= ~FDI_LINK_TRAIN_NONE;
2566 temp |= FDI_LINK_TRAIN_PATTERN_2;
2567 }
2568 I915_WRITE(reg, temp);
2569
2570 POSTING_READ(reg);
2571 udelay(150);
2572
2573 for (i = 0; i < 4; i++) {
2574 reg = FDI_TX_CTL(pipe);
2575 temp = I915_READ(reg);
2576 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2577 temp |= snb_b_fdi_train_param[i];
2578 I915_WRITE(reg, temp);
2579
2580 POSTING_READ(reg);
2581 udelay(500);
2582
2583 reg = FDI_RX_IIR(pipe);
2584 temp = I915_READ(reg);
2585 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2586
2587 if (temp & FDI_RX_SYMBOL_LOCK) {
2588 I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2589 DRM_DEBUG_KMS("FDI train 2 done.\n");
2590 break;
2591 }
2592 }
2593 if (i == 4)
2594 DRM_ERROR("FDI train 2 fail!\n");
2595
2596 DRM_DEBUG_KMS("FDI train done.\n");
2597 }
2598
2599 /* Manual link training for Ivy Bridge A0 parts */
2600 static void ivb_manual_fdi_link_train(struct drm_crtc *crtc)
2601 {
2602 struct drm_device *dev = crtc->dev;
2603 struct drm_i915_private *dev_priv = dev->dev_private;
2604 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2605 int pipe = intel_crtc->pipe;
2606 u32 reg, temp, i;
2607
2608 /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2609 for train result */
2610 reg = FDI_RX_IMR(pipe);
2611 temp = I915_READ(reg);
2612 temp &= ~FDI_RX_SYMBOL_LOCK;
2613 temp &= ~FDI_RX_BIT_LOCK;
2614 I915_WRITE(reg, temp);
2615
2616 POSTING_READ(reg);
2617 udelay(150);
2618
2619 /* enable CPU FDI TX and PCH FDI RX */
2620 reg = FDI_TX_CTL(pipe);
2621 temp = I915_READ(reg);
2622 temp &= ~(7 << 19);
2623 temp |= (intel_crtc->fdi_lanes - 1) << 19;
2624 temp &= ~(FDI_LINK_TRAIN_AUTO | FDI_LINK_TRAIN_NONE_IVB);
2625 temp |= FDI_LINK_TRAIN_PATTERN_1_IVB;
2626 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2627 temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2628 temp |= FDI_COMPOSITE_SYNC;
2629 I915_WRITE(reg, temp | FDI_TX_ENABLE);
2630
2631 reg = FDI_RX_CTL(pipe);
2632 temp = I915_READ(reg);
2633 temp &= ~FDI_LINK_TRAIN_AUTO;
2634 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2635 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2636 temp |= FDI_COMPOSITE_SYNC;
2637 I915_WRITE(reg, temp | FDI_RX_ENABLE);
2638
2639 POSTING_READ(reg);
2640 udelay(150);
2641
2642 if (HAS_PCH_CPT(dev))
2643 cpt_phase_pointer_enable(dev, pipe);
2644
2645 for (i = 0; i < 4; i++) {
2646 reg = FDI_TX_CTL(pipe);
2647 temp = I915_READ(reg);
2648 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2649 temp |= snb_b_fdi_train_param[i];
2650 I915_WRITE(reg, temp);
2651
2652 POSTING_READ(reg);
2653 udelay(500);
2654
2655 reg = FDI_RX_IIR(pipe);
2656 temp = I915_READ(reg);
2657 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2658
2659 if (temp & FDI_RX_BIT_LOCK ||
2660 (I915_READ(reg) & FDI_RX_BIT_LOCK)) {
2661 I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2662 DRM_DEBUG_KMS("FDI train 1 done.\n");
2663 break;
2664 }
2665 }
2666 if (i == 4)
2667 DRM_ERROR("FDI train 1 fail!\n");
2668
2669 /* Train 2 */
2670 reg = FDI_TX_CTL(pipe);
2671 temp = I915_READ(reg);
2672 temp &= ~FDI_LINK_TRAIN_NONE_IVB;
2673 temp |= FDI_LINK_TRAIN_PATTERN_2_IVB;
2674 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2675 temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2676 I915_WRITE(reg, temp);
2677
2678 reg = FDI_RX_CTL(pipe);
2679 temp = I915_READ(reg);
2680 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2681 temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
2682 I915_WRITE(reg, temp);
2683
2684 POSTING_READ(reg);
2685 udelay(150);
2686
2687 for (i = 0; i < 4; i++) {
2688 reg = FDI_TX_CTL(pipe);
2689 temp = I915_READ(reg);
2690 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2691 temp |= snb_b_fdi_train_param[i];
2692 I915_WRITE(reg, temp);
2693
2694 POSTING_READ(reg);
2695 udelay(500);
2696
2697 reg = FDI_RX_IIR(pipe);
2698 temp = I915_READ(reg);
2699 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2700
2701 if (temp & FDI_RX_SYMBOL_LOCK) {
2702 I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2703 DRM_DEBUG_KMS("FDI train 2 done.\n");
2704 break;
2705 }
2706 }
2707 if (i == 4)
2708 DRM_ERROR("FDI train 2 fail!\n");
2709
2710 DRM_DEBUG_KMS("FDI train done.\n");
2711 }
2712
2713 static void ironlake_fdi_pll_enable(struct drm_crtc *crtc)
2714 {
2715 struct drm_device *dev = crtc->dev;
2716 struct drm_i915_private *dev_priv = dev->dev_private;
2717 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2718 int pipe = intel_crtc->pipe;
2719 u32 reg, temp;
2720
2721 /* Write the TU size bits so error detection works */
2722 I915_WRITE(FDI_RX_TUSIZE1(pipe),
2723 I915_READ(PIPE_DATA_M1(pipe)) & TU_SIZE_MASK);
2724
2725 /* enable PCH FDI RX PLL, wait warmup plus DMI latency */
2726 reg = FDI_RX_CTL(pipe);
2727 temp = I915_READ(reg);
2728 temp &= ~((0x7 << 19) | (0x7 << 16));
2729 temp |= (intel_crtc->fdi_lanes - 1) << 19;
2730 temp |= (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) << 11;
2731 I915_WRITE(reg, temp | FDI_RX_PLL_ENABLE);
2732
2733 POSTING_READ(reg);
2734 udelay(200);
2735
2736 /* Switch from Rawclk to PCDclk */
2737 temp = I915_READ(reg);
2738 I915_WRITE(reg, temp | FDI_PCDCLK);
2739
2740 POSTING_READ(reg);
2741 udelay(200);
2742
2743 /* Enable CPU FDI TX PLL, always on for Ironlake */
2744 reg = FDI_TX_CTL(pipe);
2745 temp = I915_READ(reg);
2746 if ((temp & FDI_TX_PLL_ENABLE) == 0) {
2747 I915_WRITE(reg, temp | FDI_TX_PLL_ENABLE);
2748
2749 POSTING_READ(reg);
2750 udelay(100);
2751 }
2752 }
2753
2754 static void cpt_phase_pointer_disable(struct drm_device *dev, int pipe)
2755 {
2756 struct drm_i915_private *dev_priv = dev->dev_private;
2757 u32 flags = I915_READ(SOUTH_CHICKEN1);
2758
2759 flags &= ~(FDI_PHASE_SYNC_EN(pipe));
2760 I915_WRITE(SOUTH_CHICKEN1, flags); /* once to disable... */
2761 flags &= ~(FDI_PHASE_SYNC_OVR(pipe));
2762 I915_WRITE(SOUTH_CHICKEN1, flags); /* then again to lock */
2763 POSTING_READ(SOUTH_CHICKEN1);
2764 }
2765 static void ironlake_fdi_disable(struct drm_crtc *crtc)
2766 {
2767 struct drm_device *dev = crtc->dev;
2768 struct drm_i915_private *dev_priv = dev->dev_private;
2769 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2770 int pipe = intel_crtc->pipe;
2771 u32 reg, temp;
2772
2773 /* disable CPU FDI tx and PCH FDI rx */
2774 reg = FDI_TX_CTL(pipe);
2775 temp = I915_READ(reg);
2776 I915_WRITE(reg, temp & ~FDI_TX_ENABLE);
2777 POSTING_READ(reg);
2778
2779 reg = FDI_RX_CTL(pipe);
2780 temp = I915_READ(reg);
2781 temp &= ~(0x7 << 16);
2782 temp |= (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) << 11;
2783 I915_WRITE(reg, temp & ~FDI_RX_ENABLE);
2784
2785 POSTING_READ(reg);
2786 udelay(100);
2787
2788 /* Ironlake workaround, disable clock pointer after downing FDI */
2789 if (HAS_PCH_IBX(dev)) {
2790 I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
2791 I915_WRITE(FDI_RX_CHICKEN(pipe),
2792 I915_READ(FDI_RX_CHICKEN(pipe) &
2793 ~FDI_RX_PHASE_SYNC_POINTER_EN));
2794 } else if (HAS_PCH_CPT(dev)) {
2795 cpt_phase_pointer_disable(dev, pipe);
2796 }
2797
2798 /* still set train pattern 1 */
2799 reg = FDI_TX_CTL(pipe);
2800 temp = I915_READ(reg);
2801 temp &= ~FDI_LINK_TRAIN_NONE;
2802 temp |= FDI_LINK_TRAIN_PATTERN_1;
2803 I915_WRITE(reg, temp);
2804
2805 reg = FDI_RX_CTL(pipe);
2806 temp = I915_READ(reg);
2807 if (HAS_PCH_CPT(dev)) {
2808 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2809 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2810 } else {
2811 temp &= ~FDI_LINK_TRAIN_NONE;
2812 temp |= FDI_LINK_TRAIN_PATTERN_1;
2813 }
2814 /* BPC in FDI rx is consistent with that in PIPECONF */
2815 temp &= ~(0x07 << 16);
2816 temp |= (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) << 11;
2817 I915_WRITE(reg, temp);
2818
2819 POSTING_READ(reg);
2820 udelay(100);
2821 }
2822
2823 /*
2824 * When we disable a pipe, we need to clear any pending scanline wait events
2825 * to avoid hanging the ring, which we assume we are waiting on.
2826 */
2827 static void intel_clear_scanline_wait(struct drm_device *dev)
2828 {
2829 struct drm_i915_private *dev_priv = dev->dev_private;
2830 struct intel_ring_buffer *ring;
2831 u32 tmp;
2832
2833 if (IS_GEN2(dev))
2834 /* Can't break the hang on i8xx */
2835 return;
2836
2837 ring = LP_RING(dev_priv);
2838 tmp = I915_READ_CTL(ring);
2839 if (tmp & RING_WAIT)
2840 I915_WRITE_CTL(ring, tmp);
2841 }
2842
2843 static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
2844 {
2845 struct drm_i915_gem_object *obj;
2846 struct drm_i915_private *dev_priv;
2847
2848 if (crtc->fb == NULL)
2849 return;
2850
2851 obj = to_intel_framebuffer(crtc->fb)->obj;
2852 dev_priv = crtc->dev->dev_private;
2853 wait_event(dev_priv->pending_flip_queue,
2854 atomic_read(&obj->pending_flip) == 0);
2855 }
2856
2857 static bool intel_crtc_driving_pch(struct drm_crtc *crtc)
2858 {
2859 struct drm_device *dev = crtc->dev;
2860 struct drm_mode_config *mode_config = &dev->mode_config;
2861 struct intel_encoder *encoder;
2862
2863 /*
2864 * If there's a non-PCH eDP on this crtc, it must be DP_A, and that
2865 * must be driven by its own crtc; no sharing is possible.
2866 */
2867 list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
2868 if (encoder->base.crtc != crtc)
2869 continue;
2870
2871 switch (encoder->type) {
2872 case INTEL_OUTPUT_EDP:
2873 if (!intel_encoder_is_pch_edp(&encoder->base))
2874 return false;
2875 continue;
2876 }
2877 }
2878
2879 return true;
2880 }
2881
2882 /*
2883 * Enable PCH resources required for PCH ports:
2884 * - PCH PLLs
2885 * - FDI training & RX/TX
2886 * - update transcoder timings
2887 * - DP transcoding bits
2888 * - transcoder
2889 */
2890 static void ironlake_pch_enable(struct drm_crtc *crtc)
2891 {
2892 struct drm_device *dev = crtc->dev;
2893 struct drm_i915_private *dev_priv = dev->dev_private;
2894 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2895 int pipe = intel_crtc->pipe;
2896 u32 reg, temp, transc_sel;
2897
2898 /* For PCH output, training FDI link */
2899 dev_priv->display.fdi_link_train(crtc);
2900
2901 intel_enable_pch_pll(dev_priv, pipe);
2902
2903 if (HAS_PCH_CPT(dev)) {
2904 transc_sel = intel_crtc->use_pll_a ? TRANSC_DPLLA_SEL :
2905 TRANSC_DPLLB_SEL;
2906
2907 /* Be sure PCH DPLL SEL is set */
2908 temp = I915_READ(PCH_DPLL_SEL);
2909 if (pipe == 0) {
2910 temp &= ~(TRANSA_DPLLB_SEL);
2911 temp |= (TRANSA_DPLL_ENABLE | TRANSA_DPLLA_SEL);
2912 } else if (pipe == 1) {
2913 temp &= ~(TRANSB_DPLLB_SEL);
2914 temp |= (TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL);
2915 } else if (pipe == 2) {
2916 temp &= ~(TRANSC_DPLLB_SEL);
2917 temp |= (TRANSC_DPLL_ENABLE | transc_sel);
2918 }
2919 I915_WRITE(PCH_DPLL_SEL, temp);
2920 }
2921
2922 /* set transcoder timing, panel must allow it */
2923 assert_panel_unlocked(dev_priv, pipe);
2924 I915_WRITE(TRANS_HTOTAL(pipe), I915_READ(HTOTAL(pipe)));
2925 I915_WRITE(TRANS_HBLANK(pipe), I915_READ(HBLANK(pipe)));
2926 I915_WRITE(TRANS_HSYNC(pipe), I915_READ(HSYNC(pipe)));
2927
2928 I915_WRITE(TRANS_VTOTAL(pipe), I915_READ(VTOTAL(pipe)));
2929 I915_WRITE(TRANS_VBLANK(pipe), I915_READ(VBLANK(pipe)));
2930 I915_WRITE(TRANS_VSYNC(pipe), I915_READ(VSYNC(pipe)));
2931
2932 intel_fdi_normal_train(crtc);
2933
2934 /* For PCH DP, enable TRANS_DP_CTL */
2935 if (HAS_PCH_CPT(dev) &&
2936 (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
2937 intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
2938 u32 bpc = (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) >> 5;
2939 reg = TRANS_DP_CTL(pipe);
2940 temp = I915_READ(reg);
2941 temp &= ~(TRANS_DP_PORT_SEL_MASK |
2942 TRANS_DP_SYNC_MASK |
2943 TRANS_DP_BPC_MASK);
2944 temp |= (TRANS_DP_OUTPUT_ENABLE |
2945 TRANS_DP_ENH_FRAMING);
2946 temp |= bpc << 9; /* same format but at 11:9 */
2947
2948 if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
2949 temp |= TRANS_DP_HSYNC_ACTIVE_HIGH;
2950 if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC)
2951 temp |= TRANS_DP_VSYNC_ACTIVE_HIGH;
2952
2953 switch (intel_trans_dp_port_sel(crtc)) {
2954 case PCH_DP_B:
2955 temp |= TRANS_DP_PORT_SEL_B;
2956 break;
2957 case PCH_DP_C:
2958 temp |= TRANS_DP_PORT_SEL_C;
2959 break;
2960 case PCH_DP_D:
2961 temp |= TRANS_DP_PORT_SEL_D;
2962 break;
2963 default:
2964 DRM_DEBUG_KMS("Wrong PCH DP port return. Guess port B\n");
2965 temp |= TRANS_DP_PORT_SEL_B;
2966 break;
2967 }
2968
2969 I915_WRITE(reg, temp);
2970 }
2971
2972 intel_enable_transcoder(dev_priv, pipe);
2973 }
2974
2975 void intel_cpt_verify_modeset(struct drm_device *dev, int pipe)
2976 {
2977 struct drm_i915_private *dev_priv = dev->dev_private;
2978 int dslreg = PIPEDSL(pipe), tc2reg = TRANS_CHICKEN2(pipe);
2979 u32 temp;
2980
2981 temp = I915_READ(dslreg);
2982 udelay(500);
2983 if (wait_for(I915_READ(dslreg) != temp, 5)) {
2984 /* Without this, mode sets may fail silently on FDI */
2985 I915_WRITE(tc2reg, TRANS_AUTOTRAIN_GEN_STALL_DIS);
2986 udelay(250);
2987 I915_WRITE(tc2reg, 0);
2988 if (wait_for(I915_READ(dslreg) != temp, 5))
2989 DRM_ERROR("mode set failed: pipe %d stuck\n", pipe);
2990 }
2991 }
2992
2993 static void ironlake_crtc_enable(struct drm_crtc *crtc)
2994 {
2995 struct drm_device *dev = crtc->dev;
2996 struct drm_i915_private *dev_priv = dev->dev_private;
2997 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2998 int pipe = intel_crtc->pipe;
2999 int plane = intel_crtc->plane;
3000 u32 temp;
3001 bool is_pch_port;
3002
3003 if (intel_crtc->active)
3004 return;
3005
3006 intel_crtc->active = true;
3007 intel_update_watermarks(dev);
3008
3009 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
3010 temp = I915_READ(PCH_LVDS);
3011 if ((temp & LVDS_PORT_EN) == 0)
3012 I915_WRITE(PCH_LVDS, temp | LVDS_PORT_EN);
3013 }
3014
3015 is_pch_port = intel_crtc_driving_pch(crtc);
3016
3017 if (is_pch_port)
3018 ironlake_fdi_pll_enable(crtc);
3019 else
3020 ironlake_fdi_disable(crtc);
3021
3022 /* Enable panel fitting for LVDS */
3023 if (dev_priv->pch_pf_size &&
3024 (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) || HAS_eDP)) {
3025 /* Force use of hard-coded filter coefficients
3026 * as some pre-programmed values are broken,
3027 * e.g. x201.
3028 */
3029 I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3);
3030 I915_WRITE(PF_WIN_POS(pipe), dev_priv->pch_pf_pos);
3031 I915_WRITE(PF_WIN_SZ(pipe), dev_priv->pch_pf_size);
3032 }
3033
3034 /*
3035 * On ILK+ LUT must be loaded before the pipe is running but with
3036 * clocks enabled
3037 */
3038 intel_crtc_load_lut(crtc);
3039
3040 intel_enable_pipe(dev_priv, pipe, is_pch_port);
3041 intel_enable_plane(dev_priv, plane, pipe);
3042
3043 if (is_pch_port)
3044 ironlake_pch_enable(crtc);
3045
3046 mutex_lock(&dev->struct_mutex);
3047 intel_update_fbc(dev);
3048 mutex_unlock(&dev->struct_mutex);
3049
3050 intel_crtc_update_cursor(crtc, true);
3051 }
3052
3053 static void ironlake_crtc_disable(struct drm_crtc *crtc)
3054 {
3055 struct drm_device *dev = crtc->dev;
3056 struct drm_i915_private *dev_priv = dev->dev_private;
3057 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3058 int pipe = intel_crtc->pipe;
3059 int plane = intel_crtc->plane;
3060 u32 reg, temp;
3061
3062 if (!intel_crtc->active)
3063 return;
3064
3065 intel_crtc_wait_for_pending_flips(crtc);
3066 drm_vblank_off(dev, pipe);
3067 intel_crtc_update_cursor(crtc, false);
3068
3069 intel_disable_plane(dev_priv, plane, pipe);
3070
3071 if (dev_priv->cfb_plane == plane)
3072 intel_disable_fbc(dev);
3073
3074 intel_disable_pipe(dev_priv, pipe);
3075
3076 /* Disable PF */
3077 I915_WRITE(PF_CTL(pipe), 0);
3078 I915_WRITE(PF_WIN_SZ(pipe), 0);
3079
3080 ironlake_fdi_disable(crtc);
3081
3082 /* This is a horrible layering violation; we should be doing this in
3083 * the connector/encoder ->prepare instead, but we don't always have
3084 * enough information there about the config to know whether it will
3085 * actually be necessary or just cause undesired flicker.
3086 */
3087 intel_disable_pch_ports(dev_priv, pipe);
3088
3089 intel_disable_transcoder(dev_priv, pipe);
3090
3091 if (HAS_PCH_CPT(dev)) {
3092 /* disable TRANS_DP_CTL */
3093 reg = TRANS_DP_CTL(pipe);
3094 temp = I915_READ(reg);
3095 temp &= ~(TRANS_DP_OUTPUT_ENABLE | TRANS_DP_PORT_SEL_MASK);
3096 temp |= TRANS_DP_PORT_SEL_NONE;
3097 I915_WRITE(reg, temp);
3098
3099 /* disable DPLL_SEL */
3100 temp = I915_READ(PCH_DPLL_SEL);
3101 switch (pipe) {
3102 case 0:
3103 temp &= ~(TRANSA_DPLL_ENABLE | TRANSA_DPLLB_SEL);
3104 break;
3105 case 1:
3106 temp &= ~(TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL);
3107 break;
3108 case 2:
3109 /* C shares PLL A or B */
3110 temp &= ~(TRANSC_DPLL_ENABLE | TRANSC_DPLLB_SEL);
3111 break;
3112 default:
3113 BUG(); /* wtf */
3114 }
3115 I915_WRITE(PCH_DPLL_SEL, temp);
3116 }
3117
3118 /* disable PCH DPLL */
3119 if (!intel_crtc->no_pll)
3120 intel_disable_pch_pll(dev_priv, pipe);
3121
3122 /* Switch from PCDclk to Rawclk */
3123 reg = FDI_RX_CTL(pipe);
3124 temp = I915_READ(reg);
3125 I915_WRITE(reg, temp & ~FDI_PCDCLK);
3126
3127 /* Disable CPU FDI TX PLL */
3128 reg = FDI_TX_CTL(pipe);
3129 temp = I915_READ(reg);
3130 I915_WRITE(reg, temp & ~FDI_TX_PLL_ENABLE);
3131
3132 POSTING_READ(reg);
3133 udelay(100);
3134
3135 reg = FDI_RX_CTL(pipe);
3136 temp = I915_READ(reg);
3137 I915_WRITE(reg, temp & ~FDI_RX_PLL_ENABLE);
3138
3139 /* Wait for the clocks to turn off. */
3140 POSTING_READ(reg);
3141 udelay(100);
3142
3143 intel_crtc->active = false;
3144 intel_update_watermarks(dev);
3145
3146 mutex_lock(&dev->struct_mutex);
3147 intel_update_fbc(dev);
3148 intel_clear_scanline_wait(dev);
3149 mutex_unlock(&dev->struct_mutex);
3150 }
3151
3152 static void ironlake_crtc_dpms(struct drm_crtc *crtc, int mode)
3153 {
3154 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3155 int pipe = intel_crtc->pipe;
3156 int plane = intel_crtc->plane;
3157
3158 /* XXX: When our outputs are all unaware of DPMS modes other than off
3159 * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
3160 */
3161 switch (mode) {
3162 case DRM_MODE_DPMS_ON:
3163 case DRM_MODE_DPMS_STANDBY:
3164 case DRM_MODE_DPMS_SUSPEND:
3165 DRM_DEBUG_KMS("crtc %d/%d dpms on\n", pipe, plane);
3166 ironlake_crtc_enable(crtc);
3167 break;
3168
3169 case DRM_MODE_DPMS_OFF:
3170 DRM_DEBUG_KMS("crtc %d/%d dpms off\n", pipe, plane);
3171 ironlake_crtc_disable(crtc);
3172 break;
3173 }
3174 }
3175
3176 static void intel_crtc_dpms_overlay(struct intel_crtc *intel_crtc, bool enable)
3177 {
3178 if (!enable && intel_crtc->overlay) {
3179 struct drm_device *dev = intel_crtc->base.dev;
3180 struct drm_i915_private *dev_priv = dev->dev_private;
3181
3182 mutex_lock(&dev->struct_mutex);
3183 dev_priv->mm.interruptible = false;
3184 (void) intel_overlay_switch_off(intel_crtc->overlay);
3185 dev_priv->mm.interruptible = true;
3186 mutex_unlock(&dev->struct_mutex);
3187 }
3188
3189 /* Let userspace switch the overlay on again. In most cases userspace
3190 * has to recompute where to put it anyway.
3191 */
3192 }
3193
3194 static void i9xx_crtc_enable(struct drm_crtc *crtc)
3195 {
3196 struct drm_device *dev = crtc->dev;
3197 struct drm_i915_private *dev_priv = dev->dev_private;
3198 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3199 int pipe = intel_crtc->pipe;
3200 int plane = intel_crtc->plane;
3201
3202 if (intel_crtc->active)
3203 return;
3204
3205 intel_crtc->active = true;
3206 intel_update_watermarks(dev);
3207
3208 intel_enable_pll(dev_priv, pipe);
3209 intel_enable_pipe(dev_priv, pipe, false);
3210 intel_enable_plane(dev_priv, plane, pipe);
3211
3212 intel_crtc_load_lut(crtc);
3213 intel_update_fbc(dev);
3214
3215 /* Give the overlay scaler a chance to enable if it's on this pipe */
3216 intel_crtc_dpms_overlay(intel_crtc, true);
3217 intel_crtc_update_cursor(crtc, true);
3218 }
3219
3220 static void i9xx_crtc_disable(struct drm_crtc *crtc)
3221 {
3222 struct drm_device *dev = crtc->dev;
3223 struct drm_i915_private *dev_priv = dev->dev_private;
3224 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3225 int pipe = intel_crtc->pipe;
3226 int plane = intel_crtc->plane;
3227
3228 if (!intel_crtc->active)
3229 return;
3230
3231 /* Give the overlay scaler a chance to disable if it's on this pipe */
3232 intel_crtc_wait_for_pending_flips(crtc);
3233 drm_vblank_off(dev, pipe);
3234 intel_crtc_dpms_overlay(intel_crtc, false);
3235 intel_crtc_update_cursor(crtc, false);
3236
3237 if (dev_priv->cfb_plane == plane)
3238 intel_disable_fbc(dev);
3239
3240 intel_disable_plane(dev_priv, plane, pipe);
3241 intel_disable_pipe(dev_priv, pipe);
3242 intel_disable_pll(dev_priv, pipe);
3243
3244 intel_crtc->active = false;
3245 intel_update_fbc(dev);
3246 intel_update_watermarks(dev);
3247 intel_clear_scanline_wait(dev);
3248 }
3249
3250 static void i9xx_crtc_dpms(struct drm_crtc *crtc, int mode)
3251 {
3252 /* XXX: When our outputs are all unaware of DPMS modes other than off
3253 * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
3254 */
3255 switch (mode) {
3256 case DRM_MODE_DPMS_ON:
3257 case DRM_MODE_DPMS_STANDBY:
3258 case DRM_MODE_DPMS_SUSPEND:
3259 i9xx_crtc_enable(crtc);
3260 break;
3261 case DRM_MODE_DPMS_OFF:
3262 i9xx_crtc_disable(crtc);
3263 break;
3264 }
3265 }
3266
3267 /**
3268 * Sets the power management mode of the pipe and plane.
3269 */
3270 static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
3271 {
3272 struct drm_device *dev = crtc->dev;
3273 struct drm_i915_private *dev_priv = dev->dev_private;
3274 struct drm_i915_master_private *master_priv;
3275 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3276 int pipe = intel_crtc->pipe;
3277 bool enabled;
3278
3279 if (intel_crtc->dpms_mode == mode)
3280 return;
3281
3282 intel_crtc->dpms_mode = mode;
3283
3284 dev_priv->display.dpms(crtc, mode);
3285
3286 if (!dev->primary->master)
3287 return;
3288
3289 master_priv = dev->primary->master->driver_priv;
3290 if (!master_priv->sarea_priv)
3291 return;
3292
3293 enabled = crtc->enabled && mode != DRM_MODE_DPMS_OFF;
3294
3295 switch (pipe) {
3296 case 0:
3297 master_priv->sarea_priv->pipeA_w = enabled ? crtc->mode.hdisplay : 0;
3298 master_priv->sarea_priv->pipeA_h = enabled ? crtc->mode.vdisplay : 0;
3299 break;
3300 case 1:
3301 master_priv->sarea_priv->pipeB_w = enabled ? crtc->mode.hdisplay : 0;
3302 master_priv->sarea_priv->pipeB_h = enabled ? crtc->mode.vdisplay : 0;
3303 break;
3304 default:
3305 DRM_ERROR("Can't update pipe %c in SAREA\n", pipe_name(pipe));
3306 break;
3307 }
3308 }
3309
3310 static void intel_crtc_disable(struct drm_crtc *crtc)
3311 {
3312 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
3313 struct drm_device *dev = crtc->dev;
3314
3315 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
3316
3317 if (crtc->fb) {
3318 mutex_lock(&dev->struct_mutex);
3319 i915_gem_object_unpin(to_intel_framebuffer(crtc->fb)->obj);
3320 mutex_unlock(&dev->struct_mutex);
3321 }
3322 }
3323
3324 /* Prepare for a mode set.
3325 *
3326 * Note we could be a lot smarter here. We need to figure out which outputs
3327 * will be enabled, which disabled (in short, how the config will changes)
3328 * and perform the minimum necessary steps to accomplish that, e.g. updating
3329 * watermarks, FBC configuration, making sure PLLs are programmed correctly,
3330 * panel fitting is in the proper state, etc.
3331 */
3332 static void i9xx_crtc_prepare(struct drm_crtc *crtc)
3333 {
3334 i9xx_crtc_disable(crtc);
3335 }
3336
3337 static void i9xx_crtc_commit(struct drm_crtc *crtc)
3338 {
3339 i9xx_crtc_enable(crtc);
3340 }
3341
3342 static void ironlake_crtc_prepare(struct drm_crtc *crtc)
3343 {
3344 ironlake_crtc_disable(crtc);
3345 }
3346
3347 static void ironlake_crtc_commit(struct drm_crtc *crtc)
3348 {
3349 ironlake_crtc_enable(crtc);
3350 }
3351
3352 void intel_encoder_prepare(struct drm_encoder *encoder)
3353 {
3354 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
3355 /* lvds has its own version of prepare see intel_lvds_prepare */
3356 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
3357 }
3358
3359 void intel_encoder_commit(struct drm_encoder *encoder)
3360 {
3361 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
3362 struct drm_device *dev = encoder->dev;
3363 struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
3364 struct intel_crtc *intel_crtc = to_intel_crtc(intel_encoder->base.crtc);
3365
3366 /* lvds has its own version of commit see intel_lvds_commit */
3367 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
3368
3369 if (HAS_PCH_CPT(dev))
3370 intel_cpt_verify_modeset(dev, intel_crtc->pipe);
3371 }
3372
3373 void intel_encoder_destroy(struct drm_encoder *encoder)
3374 {
3375 struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
3376
3377 drm_encoder_cleanup(encoder);
3378 kfree(intel_encoder);
3379 }
3380
3381 static bool intel_crtc_mode_fixup(struct drm_crtc *crtc,
3382 struct drm_display_mode *mode,
3383 struct drm_display_mode *adjusted_mode)
3384 {
3385 struct drm_device *dev = crtc->dev;
3386
3387 if (HAS_PCH_SPLIT(dev)) {
3388 /* FDI link clock is fixed at 2.7G */
3389 if (mode->clock * 3 > IRONLAKE_FDI_FREQ * 4)
3390 return false;
3391 }
3392
3393 /* XXX some encoders set the crtcinfo, others don't.
3394 * Obviously we need some form of conflict resolution here...
3395 */
3396 if (adjusted_mode->crtc_htotal == 0)
3397 drm_mode_set_crtcinfo(adjusted_mode, 0);
3398
3399 return true;
3400 }
3401
3402 static int i945_get_display_clock_speed(struct drm_device *dev)
3403 {
3404 return 400000;
3405 }
3406
3407 static int i915_get_display_clock_speed(struct drm_device *dev)
3408 {
3409 return 333000;
3410 }
3411
3412 static int i9xx_misc_get_display_clock_speed(struct drm_device *dev)
3413 {
3414 return 200000;
3415 }
3416
3417 static int i915gm_get_display_clock_speed(struct drm_device *dev)
3418 {
3419 u16 gcfgc = 0;
3420
3421 pci_read_config_word(dev->pdev, GCFGC, &gcfgc);
3422
3423 if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
3424 return 133000;
3425 else {
3426 switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
3427 case GC_DISPLAY_CLOCK_333_MHZ:
3428 return 333000;
3429 default:
3430 case GC_DISPLAY_CLOCK_190_200_MHZ:
3431 return 190000;
3432 }
3433 }
3434 }
3435
3436 static int i865_get_display_clock_speed(struct drm_device *dev)
3437 {
3438 return 266000;
3439 }
3440
3441 static int i855_get_display_clock_speed(struct drm_device *dev)
3442 {
3443 u16 hpllcc = 0;
3444 /* Assume that the hardware is in the high speed state. This
3445 * should be the default.
3446 */
3447 switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
3448 case GC_CLOCK_133_200:
3449 case GC_CLOCK_100_200:
3450 return 200000;
3451 case GC_CLOCK_166_250:
3452 return 250000;
3453 case GC_CLOCK_100_133:
3454 return 133000;
3455 }
3456
3457 /* Shouldn't happen */
3458 return 0;
3459 }
3460
3461 static int i830_get_display_clock_speed(struct drm_device *dev)
3462 {
3463 return 133000;
3464 }
3465
3466 struct fdi_m_n {
3467 u32 tu;
3468 u32 gmch_m;
3469 u32 gmch_n;
3470 u32 link_m;
3471 u32 link_n;
3472 };
3473
3474 static void
3475 fdi_reduce_ratio(u32 *num, u32 *den)
3476 {
3477 while (*num > 0xffffff || *den > 0xffffff) {
3478 *num >>= 1;
3479 *den >>= 1;
3480 }
3481 }
3482
3483 static void
3484 ironlake_compute_m_n(int bits_per_pixel, int nlanes, int pixel_clock,
3485 int link_clock, struct fdi_m_n *m_n)
3486 {
3487 m_n->tu = 64; /* default size */
3488
3489 /* BUG_ON(pixel_clock > INT_MAX / 36); */
3490 m_n->gmch_m = bits_per_pixel * pixel_clock;
3491 m_n->gmch_n = link_clock * nlanes * 8;
3492 fdi_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
3493
3494 m_n->link_m = pixel_clock;
3495 m_n->link_n = link_clock;
3496 fdi_reduce_ratio(&m_n->link_m, &m_n->link_n);
3497 }
3498
3499
3500 struct intel_watermark_params {
3501 unsigned long fifo_size;
3502 unsigned long max_wm;
3503 unsigned long default_wm;
3504 unsigned long guard_size;
3505 unsigned long cacheline_size;
3506 };
3507
3508 /* Pineview has different values for various configs */
3509 static const struct intel_watermark_params pineview_display_wm = {
3510 PINEVIEW_DISPLAY_FIFO,
3511 PINEVIEW_MAX_WM,
3512 PINEVIEW_DFT_WM,
3513 PINEVIEW_GUARD_WM,
3514 PINEVIEW_FIFO_LINE_SIZE
3515 };
3516 static const struct intel_watermark_params pineview_display_hplloff_wm = {
3517 PINEVIEW_DISPLAY_FIFO,
3518 PINEVIEW_MAX_WM,
3519 PINEVIEW_DFT_HPLLOFF_WM,
3520 PINEVIEW_GUARD_WM,
3521 PINEVIEW_FIFO_LINE_SIZE
3522 };
3523 static const struct intel_watermark_params pineview_cursor_wm = {
3524 PINEVIEW_CURSOR_FIFO,
3525 PINEVIEW_CURSOR_MAX_WM,
3526 PINEVIEW_CURSOR_DFT_WM,
3527 PINEVIEW_CURSOR_GUARD_WM,
3528 PINEVIEW_FIFO_LINE_SIZE,
3529 };
3530 static const struct intel_watermark_params pineview_cursor_hplloff_wm = {
3531 PINEVIEW_CURSOR_FIFO,
3532 PINEVIEW_CURSOR_MAX_WM,
3533 PINEVIEW_CURSOR_DFT_WM,
3534 PINEVIEW_CURSOR_GUARD_WM,
3535 PINEVIEW_FIFO_LINE_SIZE
3536 };
3537 static const struct intel_watermark_params g4x_wm_info = {
3538 G4X_FIFO_SIZE,
3539 G4X_MAX_WM,
3540 G4X_MAX_WM,
3541 2,
3542 G4X_FIFO_LINE_SIZE,
3543 };
3544 static const struct intel_watermark_params g4x_cursor_wm_info = {
3545 I965_CURSOR_FIFO,
3546 I965_CURSOR_MAX_WM,
3547 I965_CURSOR_DFT_WM,
3548 2,
3549 G4X_FIFO_LINE_SIZE,
3550 };
3551 static const struct intel_watermark_params i965_cursor_wm_info = {
3552 I965_CURSOR_FIFO,
3553 I965_CURSOR_MAX_WM,
3554 I965_CURSOR_DFT_WM,
3555 2,
3556 I915_FIFO_LINE_SIZE,
3557 };
3558 static const struct intel_watermark_params i945_wm_info = {
3559 I945_FIFO_SIZE,
3560 I915_MAX_WM,
3561 1,
3562 2,
3563 I915_FIFO_LINE_SIZE
3564 };
3565 static const struct intel_watermark_params i915_wm_info = {
3566 I915_FIFO_SIZE,
3567 I915_MAX_WM,
3568 1,
3569 2,
3570 I915_FIFO_LINE_SIZE
3571 };
3572 static const struct intel_watermark_params i855_wm_info = {
3573 I855GM_FIFO_SIZE,
3574 I915_MAX_WM,
3575 1,
3576 2,
3577 I830_FIFO_LINE_SIZE
3578 };
3579 static const struct intel_watermark_params i830_wm_info = {
3580 I830_FIFO_SIZE,
3581 I915_MAX_WM,
3582 1,
3583 2,
3584 I830_FIFO_LINE_SIZE
3585 };
3586
3587 static const struct intel_watermark_params ironlake_display_wm_info = {
3588 ILK_DISPLAY_FIFO,
3589 ILK_DISPLAY_MAXWM,
3590 ILK_DISPLAY_DFTWM,
3591 2,
3592 ILK_FIFO_LINE_SIZE
3593 };
3594 static const struct intel_watermark_params ironlake_cursor_wm_info = {
3595 ILK_CURSOR_FIFO,
3596 ILK_CURSOR_MAXWM,
3597 ILK_CURSOR_DFTWM,
3598 2,
3599 ILK_FIFO_LINE_SIZE
3600 };
3601 static const struct intel_watermark_params ironlake_display_srwm_info = {
3602 ILK_DISPLAY_SR_FIFO,
3603 ILK_DISPLAY_MAX_SRWM,
3604 ILK_DISPLAY_DFT_SRWM,
3605 2,
3606 ILK_FIFO_LINE_SIZE
3607 };
3608 static const struct intel_watermark_params ironlake_cursor_srwm_info = {
3609 ILK_CURSOR_SR_FIFO,
3610 ILK_CURSOR_MAX_SRWM,
3611 ILK_CURSOR_DFT_SRWM,
3612 2,
3613 ILK_FIFO_LINE_SIZE
3614 };
3615
3616 static const struct intel_watermark_params sandybridge_display_wm_info = {
3617 SNB_DISPLAY_FIFO,
3618 SNB_DISPLAY_MAXWM,
3619 SNB_DISPLAY_DFTWM,
3620 2,
3621 SNB_FIFO_LINE_SIZE
3622 };
3623 static const struct intel_watermark_params sandybridge_cursor_wm_info = {
3624 SNB_CURSOR_FIFO,
3625 SNB_CURSOR_MAXWM,
3626 SNB_CURSOR_DFTWM,
3627 2,
3628 SNB_FIFO_LINE_SIZE
3629 };
3630 static const struct intel_watermark_params sandybridge_display_srwm_info = {
3631 SNB_DISPLAY_SR_FIFO,
3632 SNB_DISPLAY_MAX_SRWM,
3633 SNB_DISPLAY_DFT_SRWM,
3634 2,
3635 SNB_FIFO_LINE_SIZE
3636 };
3637 static const struct intel_watermark_params sandybridge_cursor_srwm_info = {
3638 SNB_CURSOR_SR_FIFO,
3639 SNB_CURSOR_MAX_SRWM,
3640 SNB_CURSOR_DFT_SRWM,
3641 2,
3642 SNB_FIFO_LINE_SIZE
3643 };
3644
3645
3646 /**
3647 * intel_calculate_wm - calculate watermark level
3648 * @clock_in_khz: pixel clock
3649 * @wm: chip FIFO params
3650 * @pixel_size: display pixel size
3651 * @latency_ns: memory latency for the platform
3652 *
3653 * Calculate the watermark level (the level at which the display plane will
3654 * start fetching from memory again). Each chip has a different display
3655 * FIFO size and allocation, so the caller needs to figure that out and pass
3656 * in the correct intel_watermark_params structure.
3657 *
3658 * As the pixel clock runs, the FIFO will be drained at a rate that depends
3659 * on the pixel size. When it reaches the watermark level, it'll start
3660 * fetching FIFO line sized based chunks from memory until the FIFO fills
3661 * past the watermark point. If the FIFO drains completely, a FIFO underrun
3662 * will occur, and a display engine hang could result.
3663 */
3664 static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
3665 const struct intel_watermark_params *wm,
3666 int fifo_size,
3667 int pixel_size,
3668 unsigned long latency_ns)
3669 {
3670 long entries_required, wm_size;
3671
3672 /*
3673 * Note: we need to make sure we don't overflow for various clock &
3674 * latency values.
3675 * clocks go from a few thousand to several hundred thousand.
3676 * latency is usually a few thousand
3677 */
3678 entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) /
3679 1000;
3680 entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size);
3681
3682 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required);
3683
3684 wm_size = fifo_size - (entries_required + wm->guard_size);
3685
3686 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size);
3687
3688 /* Don't promote wm_size to unsigned... */
3689 if (wm_size > (long)wm->max_wm)
3690 wm_size = wm->max_wm;
3691 if (wm_size <= 0)
3692 wm_size = wm->default_wm;
3693 return wm_size;
3694 }
3695
3696 struct cxsr_latency {
3697 int is_desktop;
3698 int is_ddr3;
3699 unsigned long fsb_freq;
3700 unsigned long mem_freq;
3701 unsigned long display_sr;
3702 unsigned long display_hpll_disable;
3703 unsigned long cursor_sr;
3704 unsigned long cursor_hpll_disable;
3705 };
3706
3707 static const struct cxsr_latency cxsr_latency_table[] = {
3708 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
3709 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
3710 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
3711 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
3712 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
3713
3714 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
3715 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
3716 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
3717 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
3718 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
3719
3720 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
3721 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
3722 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
3723 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
3724 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
3725
3726 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
3727 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
3728 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
3729 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
3730 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
3731
3732 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
3733 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
3734 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
3735 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
3736 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
3737
3738 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
3739 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
3740 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
3741 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
3742 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
3743 };
3744
3745 static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop,
3746 int is_ddr3,
3747 int fsb,
3748 int mem)
3749 {
3750 const struct cxsr_latency *latency;
3751 int i;
3752
3753 if (fsb == 0 || mem == 0)
3754 return NULL;
3755
3756 for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) {
3757 latency = &cxsr_latency_table[i];
3758 if (is_desktop == latency->is_desktop &&
3759 is_ddr3 == latency->is_ddr3 &&
3760 fsb == latency->fsb_freq && mem == latency->mem_freq)
3761 return latency;
3762 }
3763
3764 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
3765
3766 return NULL;
3767 }
3768
3769 static void pineview_disable_cxsr(struct drm_device *dev)
3770 {
3771 struct drm_i915_private *dev_priv = dev->dev_private;
3772
3773 /* deactivate cxsr */
3774 I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN);
3775 }
3776
3777 /*
3778 * Latency for FIFO fetches is dependent on several factors:
3779 * - memory configuration (speed, channels)
3780 * - chipset
3781 * - current MCH state
3782 * It can be fairly high in some situations, so here we assume a fairly
3783 * pessimal value. It's a tradeoff between extra memory fetches (if we
3784 * set this value too high, the FIFO will fetch frequently to stay full)
3785 * and power consumption (set it too low to save power and we might see
3786 * FIFO underruns and display "flicker").
3787 *
3788 * A value of 5us seems to be a good balance; safe for very low end
3789 * platforms but not overly aggressive on lower latency configs.
3790 */
3791 static const int latency_ns = 5000;
3792
3793 static int i9xx_get_fifo_size(struct drm_device *dev, int plane)
3794 {
3795 struct drm_i915_private *dev_priv = dev->dev_private;
3796 uint32_t dsparb = I915_READ(DSPARB);
3797 int size;
3798
3799 size = dsparb & 0x7f;
3800 if (plane)
3801 size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size;
3802
3803 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
3804 plane ? "B" : "A", size);
3805
3806 return size;
3807 }
3808
3809 static int i85x_get_fifo_size(struct drm_device *dev, int plane)
3810 {
3811 struct drm_i915_private *dev_priv = dev->dev_private;
3812 uint32_t dsparb = I915_READ(DSPARB);
3813 int size;
3814
3815 size = dsparb & 0x1ff;
3816 if (plane)
3817 size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size;
3818 size >>= 1; /* Convert to cachelines */
3819
3820 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
3821 plane ? "B" : "A", size);
3822
3823 return size;
3824 }
3825
3826 static int i845_get_fifo_size(struct drm_device *dev, int plane)
3827 {
3828 struct drm_i915_private *dev_priv = dev->dev_private;
3829 uint32_t dsparb = I915_READ(DSPARB);
3830 int size;
3831
3832 size = dsparb & 0x7f;
3833 size >>= 2; /* Convert to cachelines */
3834
3835 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
3836 plane ? "B" : "A",
3837 size);
3838
3839 return size;
3840 }
3841
3842 static int i830_get_fifo_size(struct drm_device *dev, int plane)
3843 {
3844 struct drm_i915_private *dev_priv = dev->dev_private;
3845 uint32_t dsparb = I915_READ(DSPARB);
3846 int size;
3847
3848 size = dsparb & 0x7f;
3849 size >>= 1; /* Convert to cachelines */
3850
3851 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
3852 plane ? "B" : "A", size);
3853
3854 return size;
3855 }
3856
3857 static struct drm_crtc *single_enabled_crtc(struct drm_device *dev)
3858 {
3859 struct drm_crtc *crtc, *enabled = NULL;
3860
3861 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
3862 if (crtc->enabled && crtc->fb) {
3863 if (enabled)
3864 return NULL;
3865 enabled = crtc;
3866 }
3867 }
3868
3869 return enabled;
3870 }
3871
3872 static void pineview_update_wm(struct drm_device *dev)
3873 {
3874 struct drm_i915_private *dev_priv = dev->dev_private;
3875 struct drm_crtc *crtc;
3876 const struct cxsr_latency *latency;
3877 u32 reg;
3878 unsigned long wm;
3879
3880 latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3,
3881 dev_priv->fsb_freq, dev_priv->mem_freq);
3882 if (!latency) {
3883 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
3884 pineview_disable_cxsr(dev);
3885 return;
3886 }
3887
3888 crtc = single_enabled_crtc(dev);
3889 if (crtc) {
3890 int clock = crtc->mode.clock;
3891 int pixel_size = crtc->fb->bits_per_pixel / 8;
3892
3893 /* Display SR */
3894 wm = intel_calculate_wm(clock, &pineview_display_wm,
3895 pineview_display_wm.fifo_size,
3896 pixel_size, latency->display_sr);
3897 reg = I915_READ(DSPFW1);
3898 reg &= ~DSPFW_SR_MASK;
3899 reg |= wm << DSPFW_SR_SHIFT;
3900 I915_WRITE(DSPFW1, reg);
3901 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg);
3902
3903 /* cursor SR */
3904 wm = intel_calculate_wm(clock, &pineview_cursor_wm,
3905 pineview_display_wm.fifo_size,
3906 pixel_size, latency->cursor_sr);
3907 reg = I915_READ(DSPFW3);
3908 reg &= ~DSPFW_CURSOR_SR_MASK;
3909 reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT;
3910 I915_WRITE(DSPFW3, reg);
3911
3912 /* Display HPLL off SR */
3913 wm = intel_calculate_wm(clock, &pineview_display_hplloff_wm,
3914 pineview_display_hplloff_wm.fifo_size,
3915 pixel_size, latency->display_hpll_disable);
3916 reg = I915_READ(DSPFW3);
3917 reg &= ~DSPFW_HPLL_SR_MASK;
3918 reg |= wm & DSPFW_HPLL_SR_MASK;
3919 I915_WRITE(DSPFW3, reg);
3920
3921 /* cursor HPLL off SR */
3922 wm = intel_calculate_wm(clock, &pineview_cursor_hplloff_wm,
3923 pineview_display_hplloff_wm.fifo_size,
3924 pixel_size, latency->cursor_hpll_disable);
3925 reg = I915_READ(DSPFW3);
3926 reg &= ~DSPFW_HPLL_CURSOR_MASK;
3927 reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT;
3928 I915_WRITE(DSPFW3, reg);
3929 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg);
3930
3931 /* activate cxsr */
3932 I915_WRITE(DSPFW3,
3933 I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN);
3934 DRM_DEBUG_KMS("Self-refresh is enabled\n");
3935 } else {
3936 pineview_disable_cxsr(dev);
3937 DRM_DEBUG_KMS("Self-refresh is disabled\n");
3938 }
3939 }
3940
3941 static bool g4x_compute_wm0(struct drm_device *dev,
3942 int plane,
3943 const struct intel_watermark_params *display,
3944 int display_latency_ns,
3945 const struct intel_watermark_params *cursor,
3946 int cursor_latency_ns,
3947 int *plane_wm,
3948 int *cursor_wm)
3949 {
3950 struct drm_crtc *crtc;
3951 int htotal, hdisplay, clock, pixel_size;
3952 int line_time_us, line_count;
3953 int entries, tlb_miss;
3954
3955 crtc = intel_get_crtc_for_plane(dev, plane);
3956 if (crtc->fb == NULL || !crtc->enabled) {
3957 *cursor_wm = cursor->guard_size;
3958 *plane_wm = display->guard_size;
3959 return false;
3960 }
3961
3962 htotal = crtc->mode.htotal;
3963 hdisplay = crtc->mode.hdisplay;
3964 clock = crtc->mode.clock;
3965 pixel_size = crtc->fb->bits_per_pixel / 8;
3966
3967 /* Use the small buffer method to calculate plane watermark */
3968 entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000;
3969 tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8;
3970 if (tlb_miss > 0)
3971 entries += tlb_miss;
3972 entries = DIV_ROUND_UP(entries, display->cacheline_size);
3973 *plane_wm = entries + display->guard_size;
3974 if (*plane_wm > (int)display->max_wm)
3975 *plane_wm = display->max_wm;
3976
3977 /* Use the large buffer method to calculate cursor watermark */
3978 line_time_us = ((htotal * 1000) / clock);
3979 line_count = (cursor_latency_ns / line_time_us + 1000) / 1000;
3980 entries = line_count * 64 * pixel_size;
3981 tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8;
3982 if (tlb_miss > 0)
3983 entries += tlb_miss;
3984 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
3985 *cursor_wm = entries + cursor->guard_size;
3986 if (*cursor_wm > (int)cursor->max_wm)
3987 *cursor_wm = (int)cursor->max_wm;
3988
3989 return true;
3990 }
3991
3992 /*
3993 * Check the wm result.
3994 *
3995 * If any calculated watermark values is larger than the maximum value that
3996 * can be programmed into the associated watermark register, that watermark
3997 * must be disabled.
3998 */
3999 static bool g4x_check_srwm(struct drm_device *dev,
4000 int display_wm, int cursor_wm,
4001 const struct intel_watermark_params *display,
4002 const struct intel_watermark_params *cursor)
4003 {
4004 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
4005 display_wm, cursor_wm);
4006
4007 if (display_wm > display->max_wm) {
4008 DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
4009 display_wm, display->max_wm);
4010 return false;
4011 }
4012
4013 if (cursor_wm > cursor->max_wm) {
4014 DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
4015 cursor_wm, cursor->max_wm);
4016 return false;
4017 }
4018
4019 if (!(display_wm || cursor_wm)) {
4020 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
4021 return false;
4022 }
4023
4024 return true;
4025 }
4026
4027 static bool g4x_compute_srwm(struct drm_device *dev,
4028 int plane,
4029 int latency_ns,
4030 const struct intel_watermark_params *display,
4031 const struct intel_watermark_params *cursor,
4032 int *display_wm, int *cursor_wm)
4033 {
4034 struct drm_crtc *crtc;
4035 int hdisplay, htotal, pixel_size, clock;
4036 unsigned long line_time_us;
4037 int line_count, line_size;
4038 int small, large;
4039 int entries;
4040
4041 if (!latency_ns) {
4042 *display_wm = *cursor_wm = 0;
4043 return false;
4044 }
4045
4046 crtc = intel_get_crtc_for_plane(dev, plane);
4047 hdisplay = crtc->mode.hdisplay;
4048 htotal = crtc->mode.htotal;
4049 clock = crtc->mode.clock;
4050 pixel_size = crtc->fb->bits_per_pixel / 8;
4051
4052 line_time_us = (htotal * 1000) / clock;
4053 line_count = (latency_ns / line_time_us + 1000) / 1000;
4054 line_size = hdisplay * pixel_size;
4055
4056 /* Use the minimum of the small and large buffer method for primary */
4057 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
4058 large = line_count * line_size;
4059
4060 entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
4061 *display_wm = entries + display->guard_size;
4062
4063 /* calculate the self-refresh watermark for display cursor */
4064 entries = line_count * pixel_size * 64;
4065 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
4066 *cursor_wm = entries + cursor->guard_size;
4067
4068 return g4x_check_srwm(dev,
4069 *display_wm, *cursor_wm,
4070 display, cursor);
4071 }
4072
4073 #define single_plane_enabled(mask) is_power_of_2(mask)
4074
4075 static void g4x_update_wm(struct drm_device *dev)
4076 {
4077 static const int sr_latency_ns = 12000;
4078 struct drm_i915_private *dev_priv = dev->dev_private;
4079 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
4080 int plane_sr, cursor_sr;
4081 unsigned int enabled = 0;
4082
4083 if (g4x_compute_wm0(dev, 0,
4084 &g4x_wm_info, latency_ns,
4085 &g4x_cursor_wm_info, latency_ns,
4086 &planea_wm, &cursora_wm))
4087 enabled |= 1;
4088
4089 if (g4x_compute_wm0(dev, 1,
4090 &g4x_wm_info, latency_ns,
4091 &g4x_cursor_wm_info, latency_ns,
4092 &planeb_wm, &cursorb_wm))
4093 enabled |= 2;
4094
4095 plane_sr = cursor_sr = 0;
4096 if (single_plane_enabled(enabled) &&
4097 g4x_compute_srwm(dev, ffs(enabled) - 1,
4098 sr_latency_ns,
4099 &g4x_wm_info,
4100 &g4x_cursor_wm_info,
4101 &plane_sr, &cursor_sr))
4102 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
4103 else
4104 I915_WRITE(FW_BLC_SELF,
4105 I915_READ(FW_BLC_SELF) & ~FW_BLC_SELF_EN);
4106
4107 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
4108 planea_wm, cursora_wm,
4109 planeb_wm, cursorb_wm,
4110 plane_sr, cursor_sr);
4111
4112 I915_WRITE(DSPFW1,
4113 (plane_sr << DSPFW_SR_SHIFT) |
4114 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
4115 (planeb_wm << DSPFW_PLANEB_SHIFT) |
4116 planea_wm);
4117 I915_WRITE(DSPFW2,
4118 (I915_READ(DSPFW2) & DSPFW_CURSORA_MASK) |
4119 (cursora_wm << DSPFW_CURSORA_SHIFT));
4120 /* HPLL off in SR has some issues on G4x... disable it */
4121 I915_WRITE(DSPFW3,
4122 (I915_READ(DSPFW3) & ~DSPFW_HPLL_SR_EN) |
4123 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
4124 }
4125
4126 static void i965_update_wm(struct drm_device *dev)
4127 {
4128 struct drm_i915_private *dev_priv = dev->dev_private;
4129 struct drm_crtc *crtc;
4130 int srwm = 1;
4131 int cursor_sr = 16;
4132
4133 /* Calc sr entries for one plane configs */
4134 crtc = single_enabled_crtc(dev);
4135 if (crtc) {
4136 /* self-refresh has much higher latency */
4137 static const int sr_latency_ns = 12000;
4138 int clock = crtc->mode.clock;
4139 int htotal = crtc->mode.htotal;
4140 int hdisplay = crtc->mode.hdisplay;
4141 int pixel_size = crtc->fb->bits_per_pixel / 8;
4142 unsigned long line_time_us;
4143 int entries;
4144
4145 line_time_us = ((htotal * 1000) / clock);
4146
4147 /* Use ns/us then divide to preserve precision */
4148 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
4149 pixel_size * hdisplay;
4150 entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE);
4151 srwm = I965_FIFO_SIZE - entries;
4152 if (srwm < 0)
4153 srwm = 1;
4154 srwm &= 0x1ff;
4155 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
4156 entries, srwm);
4157
4158 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
4159 pixel_size * 64;
4160 entries = DIV_ROUND_UP(entries,
4161 i965_cursor_wm_info.cacheline_size);
4162 cursor_sr = i965_cursor_wm_info.fifo_size -
4163 (entries + i965_cursor_wm_info.guard_size);
4164
4165 if (cursor_sr > i965_cursor_wm_info.max_wm)
4166 cursor_sr = i965_cursor_wm_info.max_wm;
4167
4168 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
4169 "cursor %d\n", srwm, cursor_sr);
4170
4171 if (IS_CRESTLINE(dev))
4172 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
4173 } else {
4174 /* Turn off self refresh if both pipes are enabled */
4175 if (IS_CRESTLINE(dev))
4176 I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
4177 & ~FW_BLC_SELF_EN);
4178 }
4179
4180 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
4181 srwm);
4182
4183 /* 965 has limitations... */
4184 I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) |
4185 (8 << 16) | (8 << 8) | (8 << 0));
4186 I915_WRITE(DSPFW2, (8 << 8) | (8 << 0));
4187 /* update cursor SR watermark */
4188 I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
4189 }
4190
4191 static void i9xx_update_wm(struct drm_device *dev)
4192 {
4193 struct drm_i915_private *dev_priv = dev->dev_private;
4194 const struct intel_watermark_params *wm_info;
4195 uint32_t fwater_lo;
4196 uint32_t fwater_hi;
4197 int cwm, srwm = 1;
4198 int fifo_size;
4199 int planea_wm, planeb_wm;
4200 struct drm_crtc *crtc, *enabled = NULL;
4201
4202 if (IS_I945GM(dev))
4203 wm_info = &i945_wm_info;
4204 else if (!IS_GEN2(dev))
4205 wm_info = &i915_wm_info;
4206 else
4207 wm_info = &i855_wm_info;
4208
4209 fifo_size = dev_priv->display.get_fifo_size(dev, 0);
4210 crtc = intel_get_crtc_for_plane(dev, 0);
4211 if (crtc->enabled && crtc->fb) {
4212 planea_wm = intel_calculate_wm(crtc->mode.clock,
4213 wm_info, fifo_size,
4214 crtc->fb->bits_per_pixel / 8,
4215 latency_ns);
4216 enabled = crtc;
4217 } else
4218 planea_wm = fifo_size - wm_info->guard_size;
4219
4220 fifo_size = dev_priv->display.get_fifo_size(dev, 1);
4221 crtc = intel_get_crtc_for_plane(dev, 1);
4222 if (crtc->enabled && crtc->fb) {
4223 planeb_wm = intel_calculate_wm(crtc->mode.clock,
4224 wm_info, fifo_size,
4225 crtc->fb->bits_per_pixel / 8,
4226 latency_ns);
4227 if (enabled == NULL)
4228 enabled = crtc;
4229 else
4230 enabled = NULL;
4231 } else
4232 planeb_wm = fifo_size - wm_info->guard_size;
4233
4234 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
4235
4236 /*
4237 * Overlay gets an aggressive default since video jitter is bad.
4238 */
4239 cwm = 2;
4240
4241 /* Play safe and disable self-refresh before adjusting watermarks. */
4242 if (IS_I945G(dev) || IS_I945GM(dev))
4243 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | 0);
4244 else if (IS_I915GM(dev))
4245 I915_WRITE(INSTPM, I915_READ(INSTPM) & ~INSTPM_SELF_EN);
4246
4247 /* Calc sr entries for one plane configs */
4248 if (HAS_FW_BLC(dev) && enabled) {
4249 /* self-refresh has much higher latency */
4250 static const int sr_latency_ns = 6000;
4251 int clock = enabled->mode.clock;
4252 int htotal = enabled->mode.htotal;
4253 int hdisplay = enabled->mode.hdisplay;
4254 int pixel_size = enabled->fb->bits_per_pixel / 8;
4255 unsigned long line_time_us;
4256 int entries;
4257
4258 line_time_us = (htotal * 1000) / clock;
4259
4260 /* Use ns/us then divide to preserve precision */
4261 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
4262 pixel_size * hdisplay;
4263 entries = DIV_ROUND_UP(entries, wm_info->cacheline_size);
4264 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries);
4265 srwm = wm_info->fifo_size - entries;
4266 if (srwm < 0)
4267 srwm = 1;
4268
4269 if (IS_I945G(dev) || IS_I945GM(dev))
4270 I915_WRITE(FW_BLC_SELF,
4271 FW_BLC_SELF_FIFO_MASK | (srwm & 0xff));
4272 else if (IS_I915GM(dev))
4273 I915_WRITE(FW_BLC_SELF, srwm & 0x3f);
4274 }
4275
4276 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
4277 planea_wm, planeb_wm, cwm, srwm);
4278
4279 fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f);
4280 fwater_hi = (cwm & 0x1f);
4281
4282 /* Set request length to 8 cachelines per fetch */
4283 fwater_lo = fwater_lo | (1 << 24) | (1 << 8);
4284 fwater_hi = fwater_hi | (1 << 8);
4285
4286 I915_WRITE(FW_BLC, fwater_lo);
4287 I915_WRITE(FW_BLC2, fwater_hi);
4288
4289 if (HAS_FW_BLC(dev)) {
4290 if (enabled) {
4291 if (IS_I945G(dev) || IS_I945GM(dev))
4292 I915_WRITE(FW_BLC_SELF,
4293 FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN);
4294 else if (IS_I915GM(dev))
4295 I915_WRITE(INSTPM, I915_READ(INSTPM) | INSTPM_SELF_EN);
4296 DRM_DEBUG_KMS("memory self refresh enabled\n");
4297 } else
4298 DRM_DEBUG_KMS("memory self refresh disabled\n");
4299 }
4300 }
4301
4302 static void i830_update_wm(struct drm_device *dev)
4303 {
4304 struct drm_i915_private *dev_priv = dev->dev_private;
4305 struct drm_crtc *crtc;
4306 uint32_t fwater_lo;
4307 int planea_wm;
4308
4309 crtc = single_enabled_crtc(dev);
4310 if (crtc == NULL)
4311 return;
4312
4313 planea_wm = intel_calculate_wm(crtc->mode.clock, &i830_wm_info,
4314 dev_priv->display.get_fifo_size(dev, 0),
4315 crtc->fb->bits_per_pixel / 8,
4316 latency_ns);
4317 fwater_lo = I915_READ(FW_BLC) & ~0xfff;
4318 fwater_lo |= (3<<8) | planea_wm;
4319
4320 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm);
4321
4322 I915_WRITE(FW_BLC, fwater_lo);
4323 }
4324
4325 #define ILK_LP0_PLANE_LATENCY 700
4326 #define ILK_LP0_CURSOR_LATENCY 1300
4327
4328 /*
4329 * Check the wm result.
4330 *
4331 * If any calculated watermark values is larger than the maximum value that
4332 * can be programmed into the associated watermark register, that watermark
4333 * must be disabled.
4334 */
4335 static bool ironlake_check_srwm(struct drm_device *dev, int level,
4336 int fbc_wm, int display_wm, int cursor_wm,
4337 const struct intel_watermark_params *display,
4338 const struct intel_watermark_params *cursor)
4339 {
4340 struct drm_i915_private *dev_priv = dev->dev_private;
4341
4342 DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d,"
4343 " cursor %d\n", level, display_wm, fbc_wm, cursor_wm);
4344
4345 if (fbc_wm > SNB_FBC_MAX_SRWM) {
4346 DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n",
4347 fbc_wm, SNB_FBC_MAX_SRWM, level);
4348
4349 /* fbc has it's own way to disable FBC WM */
4350 I915_WRITE(DISP_ARB_CTL,
4351 I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS);
4352 return false;
4353 }
4354
4355 if (display_wm > display->max_wm) {
4356 DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n",
4357 display_wm, SNB_DISPLAY_MAX_SRWM, level);
4358 return false;
4359 }
4360
4361 if (cursor_wm > cursor->max_wm) {
4362 DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n",
4363 cursor_wm, SNB_CURSOR_MAX_SRWM, level);
4364 return false;
4365 }
4366
4367 if (!(fbc_wm || display_wm || cursor_wm)) {
4368 DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level, level);
4369 return false;
4370 }
4371
4372 return true;
4373 }
4374
4375 /*
4376 * Compute watermark values of WM[1-3],
4377 */
4378 static bool ironlake_compute_srwm(struct drm_device *dev, int level, int plane,
4379 int latency_ns,
4380 const struct intel_watermark_params *display,
4381 const struct intel_watermark_params *cursor,
4382 int *fbc_wm, int *display_wm, int *cursor_wm)
4383 {
4384 struct drm_crtc *crtc;
4385 unsigned long line_time_us;
4386 int hdisplay, htotal, pixel_size, clock;
4387 int line_count, line_size;
4388 int small, large;
4389 int entries;
4390
4391 if (!latency_ns) {
4392 *fbc_wm = *display_wm = *cursor_wm = 0;
4393 return false;
4394 }
4395
4396 crtc = intel_get_crtc_for_plane(dev, plane);
4397 hdisplay = crtc->mode.hdisplay;
4398 htotal = crtc->mode.htotal;
4399 clock = crtc->mode.clock;
4400 pixel_size = crtc->fb->bits_per_pixel / 8;
4401
4402 line_time_us = (htotal * 1000) / clock;
4403 line_count = (latency_ns / line_time_us + 1000) / 1000;
4404 line_size = hdisplay * pixel_size;
4405
4406 /* Use the minimum of the small and large buffer method for primary */
4407 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
4408 large = line_count * line_size;
4409
4410 entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
4411 *display_wm = entries + display->guard_size;
4412
4413 /*
4414 * Spec says:
4415 * FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2
4416 */
4417 *fbc_wm = DIV_ROUND_UP(*display_wm * 64, line_size) + 2;
4418
4419 /* calculate the self-refresh watermark for display cursor */
4420 entries = line_count * pixel_size * 64;
4421 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
4422 *cursor_wm = entries + cursor->guard_size;
4423
4424 return ironlake_check_srwm(dev, level,
4425 *fbc_wm, *display_wm, *cursor_wm,
4426 display, cursor);
4427 }
4428
4429 static void ironlake_update_wm(struct drm_device *dev)
4430 {
4431 struct drm_i915_private *dev_priv = dev->dev_private;
4432 int fbc_wm, plane_wm, cursor_wm;
4433 unsigned int enabled;
4434
4435 enabled = 0;
4436 if (g4x_compute_wm0(dev, 0,
4437 &ironlake_display_wm_info,
4438 ILK_LP0_PLANE_LATENCY,
4439 &ironlake_cursor_wm_info,
4440 ILK_LP0_CURSOR_LATENCY,
4441 &plane_wm, &cursor_wm)) {
4442 I915_WRITE(WM0_PIPEA_ILK,
4443 (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
4444 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
4445 " plane %d, " "cursor: %d\n",
4446 plane_wm, cursor_wm);
4447 enabled |= 1;
4448 }
4449
4450 if (g4x_compute_wm0(dev, 1,
4451 &ironlake_display_wm_info,
4452 ILK_LP0_PLANE_LATENCY,
4453 &ironlake_cursor_wm_info,
4454 ILK_LP0_CURSOR_LATENCY,
4455 &plane_wm, &cursor_wm)) {
4456 I915_WRITE(WM0_PIPEB_ILK,
4457 (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
4458 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
4459 " plane %d, cursor: %d\n",
4460 plane_wm, cursor_wm);
4461 enabled |= 2;
4462 }
4463
4464 /*
4465 * Calculate and update the self-refresh watermark only when one
4466 * display plane is used.
4467 */
4468 I915_WRITE(WM3_LP_ILK, 0);
4469 I915_WRITE(WM2_LP_ILK, 0);
4470 I915_WRITE(WM1_LP_ILK, 0);
4471
4472 if (!single_plane_enabled(enabled))
4473 return;
4474 enabled = ffs(enabled) - 1;
4475
4476 /* WM1 */
4477 if (!ironlake_compute_srwm(dev, 1, enabled,
4478 ILK_READ_WM1_LATENCY() * 500,
4479 &ironlake_display_srwm_info,
4480 &ironlake_cursor_srwm_info,
4481 &fbc_wm, &plane_wm, &cursor_wm))
4482 return;
4483
4484 I915_WRITE(WM1_LP_ILK,
4485 WM1_LP_SR_EN |
4486 (ILK_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
4487 (fbc_wm << WM1_LP_FBC_SHIFT) |
4488 (plane_wm << WM1_LP_SR_SHIFT) |
4489 cursor_wm);
4490
4491 /* WM2 */
4492 if (!ironlake_compute_srwm(dev, 2, enabled,
4493 ILK_READ_WM2_LATENCY() * 500,
4494 &ironlake_display_srwm_info,
4495 &ironlake_cursor_srwm_info,
4496 &fbc_wm, &plane_wm, &cursor_wm))
4497 return;
4498
4499 I915_WRITE(WM2_LP_ILK,
4500 WM2_LP_EN |
4501 (ILK_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
4502 (fbc_wm << WM1_LP_FBC_SHIFT) |
4503 (plane_wm << WM1_LP_SR_SHIFT) |
4504 cursor_wm);
4505
4506 /*
4507 * WM3 is unsupported on ILK, probably because we don't have latency
4508 * data for that power state
4509 */
4510 }
4511
4512 static void sandybridge_update_wm(struct drm_device *dev)
4513 {
4514 struct drm_i915_private *dev_priv = dev->dev_private;
4515 int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */
4516 int fbc_wm, plane_wm, cursor_wm;
4517 unsigned int enabled;
4518
4519 enabled = 0;
4520 if (g4x_compute_wm0(dev, 0,
4521 &sandybridge_display_wm_info, latency,
4522 &sandybridge_cursor_wm_info, latency,
4523 &plane_wm, &cursor_wm)) {
4524 I915_WRITE(WM0_PIPEA_ILK,
4525 (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
4526 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
4527 " plane %d, " "cursor: %d\n",
4528 plane_wm, cursor_wm);
4529 enabled |= 1;
4530 }
4531
4532 if (g4x_compute_wm0(dev, 1,
4533 &sandybridge_display_wm_info, latency,
4534 &sandybridge_cursor_wm_info, latency,
4535 &plane_wm, &cursor_wm)) {
4536 I915_WRITE(WM0_PIPEB_ILK,
4537 (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
4538 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
4539 " plane %d, cursor: %d\n",
4540 plane_wm, cursor_wm);
4541 enabled |= 2;
4542 }
4543
4544 /* IVB has 3 pipes */
4545 if (IS_IVYBRIDGE(dev) &&
4546 g4x_compute_wm0(dev, 2,
4547 &sandybridge_display_wm_info, latency,
4548 &sandybridge_cursor_wm_info, latency,
4549 &plane_wm, &cursor_wm)) {
4550 I915_WRITE(WM0_PIPEC_IVB,
4551 (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
4552 DRM_DEBUG_KMS("FIFO watermarks For pipe C -"
4553 " plane %d, cursor: %d\n",
4554 plane_wm, cursor_wm);
4555 enabled |= 3;
4556 }
4557
4558 /*
4559 * Calculate and update the self-refresh watermark only when one
4560 * display plane is used.
4561 *
4562 * SNB support 3 levels of watermark.
4563 *
4564 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
4565 * and disabled in the descending order
4566 *
4567 */
4568 I915_WRITE(WM3_LP_ILK, 0);
4569 I915_WRITE(WM2_LP_ILK, 0);
4570 I915_WRITE(WM1_LP_ILK, 0);
4571
4572 if (!single_plane_enabled(enabled))
4573 return;
4574 enabled = ffs(enabled) - 1;
4575
4576 /* WM1 */
4577 if (!ironlake_compute_srwm(dev, 1, enabled,
4578 SNB_READ_WM1_LATENCY() * 500,
4579 &sandybridge_display_srwm_info,
4580 &sandybridge_cursor_srwm_info,
4581 &fbc_wm, &plane_wm, &cursor_wm))
4582 return;
4583
4584 I915_WRITE(WM1_LP_ILK,
4585 WM1_LP_SR_EN |
4586 (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
4587 (fbc_wm << WM1_LP_FBC_SHIFT) |
4588 (plane_wm << WM1_LP_SR_SHIFT) |
4589 cursor_wm);
4590
4591 /* WM2 */
4592 if (!ironlake_compute_srwm(dev, 2, enabled,
4593 SNB_READ_WM2_LATENCY() * 500,
4594 &sandybridge_display_srwm_info,
4595 &sandybridge_cursor_srwm_info,
4596 &fbc_wm, &plane_wm, &cursor_wm))
4597 return;
4598
4599 I915_WRITE(WM2_LP_ILK,
4600 WM2_LP_EN |
4601 (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
4602 (fbc_wm << WM1_LP_FBC_SHIFT) |
4603 (plane_wm << WM1_LP_SR_SHIFT) |
4604 cursor_wm);
4605
4606 /* WM3 */
4607 if (!ironlake_compute_srwm(dev, 3, enabled,
4608 SNB_READ_WM3_LATENCY() * 500,
4609 &sandybridge_display_srwm_info,
4610 &sandybridge_cursor_srwm_info,
4611 &fbc_wm, &plane_wm, &cursor_wm))
4612 return;
4613
4614 I915_WRITE(WM3_LP_ILK,
4615 WM3_LP_EN |
4616 (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) |
4617 (fbc_wm << WM1_LP_FBC_SHIFT) |
4618 (plane_wm << WM1_LP_SR_SHIFT) |
4619 cursor_wm);
4620 }
4621
4622 /**
4623 * intel_update_watermarks - update FIFO watermark values based on current modes
4624 *
4625 * Calculate watermark values for the various WM regs based on current mode
4626 * and plane configuration.
4627 *
4628 * There are several cases to deal with here:
4629 * - normal (i.e. non-self-refresh)
4630 * - self-refresh (SR) mode
4631 * - lines are large relative to FIFO size (buffer can hold up to 2)
4632 * - lines are small relative to FIFO size (buffer can hold more than 2
4633 * lines), so need to account for TLB latency
4634 *
4635 * The normal calculation is:
4636 * watermark = dotclock * bytes per pixel * latency
4637 * where latency is platform & configuration dependent (we assume pessimal
4638 * values here).
4639 *
4640 * The SR calculation is:
4641 * watermark = (trunc(latency/line time)+1) * surface width *
4642 * bytes per pixel
4643 * where
4644 * line time = htotal / dotclock
4645 * surface width = hdisplay for normal plane and 64 for cursor
4646 * and latency is assumed to be high, as above.
4647 *
4648 * The final value programmed to the register should always be rounded up,
4649 * and include an extra 2 entries to account for clock crossings.
4650 *
4651 * We don't use the sprite, so we can ignore that. And on Crestline we have
4652 * to set the non-SR watermarks to 8.
4653 */
4654 static void intel_update_watermarks(struct drm_device *dev)
4655 {
4656 struct drm_i915_private *dev_priv = dev->dev_private;
4657
4658 if (dev_priv->display.update_wm)
4659 dev_priv->display.update_wm(dev);
4660 }
4661
4662 static inline bool intel_panel_use_ssc(struct drm_i915_private *dev_priv)
4663 {
4664 if (i915_panel_use_ssc >= 0)
4665 return i915_panel_use_ssc != 0;
4666 return dev_priv->lvds_use_ssc
4667 && !(dev_priv->quirks & QUIRK_LVDS_SSC_DISABLE);
4668 }
4669
4670 /**
4671 * intel_choose_pipe_bpp_dither - figure out what color depth the pipe should send
4672 * @crtc: CRTC structure
4673 * @mode: requested mode
4674 *
4675 * A pipe may be connected to one or more outputs. Based on the depth of the
4676 * attached framebuffer, choose a good color depth to use on the pipe.
4677 *
4678 * If possible, match the pipe depth to the fb depth. In some cases, this
4679 * isn't ideal, because the connected output supports a lesser or restricted
4680 * set of depths. Resolve that here:
4681 * LVDS typically supports only 6bpc, so clamp down in that case
4682 * HDMI supports only 8bpc or 12bpc, so clamp to 8bpc with dither for 10bpc
4683 * Displays may support a restricted set as well, check EDID and clamp as
4684 * appropriate.
4685 * DP may want to dither down to 6bpc to fit larger modes
4686 *
4687 * RETURNS:
4688 * Dithering requirement (i.e. false if display bpc and pipe bpc match,
4689 * true if they don't match).
4690 */
4691 static bool intel_choose_pipe_bpp_dither(struct drm_crtc *crtc,
4692 unsigned int *pipe_bpp,
4693 struct drm_display_mode *mode)
4694 {
4695 struct drm_device *dev = crtc->dev;
4696 struct drm_i915_private *dev_priv = dev->dev_private;
4697 struct drm_encoder *encoder;
4698 struct drm_connector *connector;
4699 unsigned int display_bpc = UINT_MAX, bpc;
4700
4701 /* Walk the encoders & connectors on this crtc, get min bpc */
4702 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
4703 struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
4704
4705 if (encoder->crtc != crtc)
4706 continue;
4707
4708 if (intel_encoder->type == INTEL_OUTPUT_LVDS) {
4709 unsigned int lvds_bpc;
4710
4711 if ((I915_READ(PCH_LVDS) & LVDS_A3_POWER_MASK) ==
4712 LVDS_A3_POWER_UP)
4713 lvds_bpc = 8;
4714 else
4715 lvds_bpc = 6;
4716
4717 if (lvds_bpc < display_bpc) {
4718 DRM_DEBUG_KMS("clamping display bpc (was %d) to LVDS (%d)\n", display_bpc, lvds_bpc);
4719 display_bpc = lvds_bpc;
4720 }
4721 continue;
4722 }
4723
4724 if (intel_encoder->type == INTEL_OUTPUT_EDP) {
4725 /* Use VBT settings if we have an eDP panel */
4726 unsigned int edp_bpc = dev_priv->edp.bpp / 3;
4727
4728 if (edp_bpc < display_bpc) {
4729 DRM_DEBUG_KMS("clamping display bpc (was %d) to eDP (%d)\n", display_bpc, edp_bpc);
4730 display_bpc = edp_bpc;
4731 }
4732 continue;
4733 }
4734
4735 /* Not one of the known troublemakers, check the EDID */
4736 list_for_each_entry(connector, &dev->mode_config.connector_list,
4737 head) {
4738 if (connector->encoder != encoder)
4739 continue;
4740
4741 /* Don't use an invalid EDID bpc value */
4742 if (connector->display_info.bpc &&
4743 connector->display_info.bpc < display_bpc) {
4744 DRM_DEBUG_KMS("clamping display bpc (was %d) to EDID reported max of %d\n", display_bpc, connector->display_info.bpc);
4745 display_bpc = connector->display_info.bpc;
4746 }
4747 }
4748
4749 /*
4750 * HDMI is either 12 or 8, so if the display lets 10bpc sneak
4751 * through, clamp it down. (Note: >12bpc will be caught below.)
4752 */
4753 if (intel_encoder->type == INTEL_OUTPUT_HDMI) {
4754 if (display_bpc > 8 && display_bpc < 12) {
4755 DRM_DEBUG_KMS("forcing bpc to 12 for HDMI\n");
4756 display_bpc = 12;
4757 } else {
4758 DRM_DEBUG_KMS("forcing bpc to 8 for HDMI\n");
4759 display_bpc = 8;
4760 }
4761 }
4762 }
4763
4764 if (mode->private_flags & INTEL_MODE_DP_FORCE_6BPC) {
4765 DRM_DEBUG_KMS("Dithering DP to 6bpc\n");
4766 display_bpc = 6;
4767 }
4768
4769 /*
4770 * We could just drive the pipe at the highest bpc all the time and
4771 * enable dithering as needed, but that costs bandwidth. So choose
4772 * the minimum value that expresses the full color range of the fb but
4773 * also stays within the max display bpc discovered above.
4774 */
4775
4776 switch (crtc->fb->depth) {
4777 case 8:
4778 bpc = 8; /* since we go through a colormap */
4779 break;
4780 case 15:
4781 case 16:
4782 bpc = 6; /* min is 18bpp */
4783 break;
4784 case 24:
4785 bpc = 8;
4786 break;
4787 case 30:
4788 bpc = 10;
4789 break;
4790 case 48:
4791 bpc = 12;
4792 break;
4793 default:
4794 DRM_DEBUG("unsupported depth, assuming 24 bits\n");
4795 bpc = min((unsigned int)8, display_bpc);
4796 break;
4797 }
4798
4799 display_bpc = min(display_bpc, bpc);
4800
4801 DRM_DEBUG_KMS("setting pipe bpc to %d (max display bpc %d)\n",
4802 bpc, display_bpc);
4803
4804 *pipe_bpp = display_bpc * 3;
4805
4806 return display_bpc != bpc;
4807 }
4808
4809 static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
4810 struct drm_display_mode *mode,
4811 struct drm_display_mode *adjusted_mode,
4812 int x, int y,
4813 struct drm_framebuffer *old_fb)
4814 {
4815 struct drm_device *dev = crtc->dev;
4816 struct drm_i915_private *dev_priv = dev->dev_private;
4817 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4818 int pipe = intel_crtc->pipe;
4819 int plane = intel_crtc->plane;
4820 int refclk, num_connectors = 0;
4821 intel_clock_t clock, reduced_clock;
4822 u32 dpll, fp = 0, fp2 = 0, dspcntr, pipeconf;
4823 bool ok, has_reduced_clock = false, is_sdvo = false, is_dvo = false;
4824 bool is_crt = false, is_lvds = false, is_tv = false, is_dp = false;
4825 struct drm_mode_config *mode_config = &dev->mode_config;
4826 struct intel_encoder *encoder;
4827 const intel_limit_t *limit;
4828 int ret;
4829 u32 temp;
4830 u32 lvds_sync = 0;
4831
4832 list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
4833 if (encoder->base.crtc != crtc)
4834 continue;
4835
4836 switch (encoder->type) {
4837 case INTEL_OUTPUT_LVDS:
4838 is_lvds = true;
4839 break;
4840 case INTEL_OUTPUT_SDVO:
4841 case INTEL_OUTPUT_HDMI:
4842 is_sdvo = true;
4843 if (encoder->needs_tv_clock)
4844 is_tv = true;
4845 break;
4846 case INTEL_OUTPUT_DVO:
4847 is_dvo = true;
4848 break;
4849 case INTEL_OUTPUT_TVOUT:
4850 is_tv = true;
4851 break;
4852 case INTEL_OUTPUT_ANALOG:
4853 is_crt = true;
4854 break;
4855 case INTEL_OUTPUT_DISPLAYPORT:
4856 is_dp = true;
4857 break;
4858 }
4859
4860 num_connectors++;
4861 }
4862
4863 if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
4864 refclk = dev_priv->lvds_ssc_freq * 1000;
4865 DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
4866 refclk / 1000);
4867 } else if (!IS_GEN2(dev)) {
4868 refclk = 96000;
4869 } else {
4870 refclk = 48000;
4871 }
4872
4873 /*
4874 * Returns a set of divisors for the desired target clock with the given
4875 * refclk, or FALSE. The returned values represent the clock equation:
4876 * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
4877 */
4878 limit = intel_limit(crtc, refclk);
4879 ok = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk, &clock);
4880 if (!ok) {
4881 DRM_ERROR("Couldn't find PLL settings for mode!\n");
4882 return -EINVAL;
4883 }
4884
4885 /* Ensure that the cursor is valid for the new mode before changing... */
4886 intel_crtc_update_cursor(crtc, true);
4887
4888 if (is_lvds && dev_priv->lvds_downclock_avail) {
4889 has_reduced_clock = limit->find_pll(limit, crtc,
4890 dev_priv->lvds_downclock,
4891 refclk,
4892 &reduced_clock);
4893 if (has_reduced_clock && (clock.p != reduced_clock.p)) {
4894 /*
4895 * If the different P is found, it means that we can't
4896 * switch the display clock by using the FP0/FP1.
4897 * In such case we will disable the LVDS downclock
4898 * feature.
4899 */
4900 DRM_DEBUG_KMS("Different P is found for "
4901 "LVDS clock/downclock\n");
4902 has_reduced_clock = 0;
4903 }
4904 }
4905 /* SDVO TV has fixed PLL values depend on its clock range,
4906 this mirrors vbios setting. */
4907 if (is_sdvo && is_tv) {
4908 if (adjusted_mode->clock >= 100000
4909 && adjusted_mode->clock < 140500) {
4910 clock.p1 = 2;
4911 clock.p2 = 10;
4912 clock.n = 3;
4913 clock.m1 = 16;
4914 clock.m2 = 8;
4915 } else if (adjusted_mode->clock >= 140500
4916 && adjusted_mode->clock <= 200000) {
4917 clock.p1 = 1;
4918 clock.p2 = 10;
4919 clock.n = 6;
4920 clock.m1 = 12;
4921 clock.m2 = 8;
4922 }
4923 }
4924
4925 if (IS_PINEVIEW(dev)) {
4926 fp = (1 << clock.n) << 16 | clock.m1 << 8 | clock.m2;
4927 if (has_reduced_clock)
4928 fp2 = (1 << reduced_clock.n) << 16 |
4929 reduced_clock.m1 << 8 | reduced_clock.m2;
4930 } else {
4931 fp = clock.n << 16 | clock.m1 << 8 | clock.m2;
4932 if (has_reduced_clock)
4933 fp2 = reduced_clock.n << 16 | reduced_clock.m1 << 8 |
4934 reduced_clock.m2;
4935 }
4936
4937 dpll = DPLL_VGA_MODE_DIS;
4938
4939 if (!IS_GEN2(dev)) {
4940 if (is_lvds)
4941 dpll |= DPLLB_MODE_LVDS;
4942 else
4943 dpll |= DPLLB_MODE_DAC_SERIAL;
4944 if (is_sdvo) {
4945 int pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
4946 if (pixel_multiplier > 1) {
4947 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
4948 dpll |= (pixel_multiplier - 1) << SDVO_MULTIPLIER_SHIFT_HIRES;
4949 }
4950 dpll |= DPLL_DVO_HIGH_SPEED;
4951 }
4952 if (is_dp)
4953 dpll |= DPLL_DVO_HIGH_SPEED;
4954
4955 /* compute bitmask from p1 value */
4956 if (IS_PINEVIEW(dev))
4957 dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW;
4958 else {
4959 dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4960 if (IS_G4X(dev) && has_reduced_clock)
4961 dpll |= (1 << (reduced_clock.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
4962 }
4963 switch (clock.p2) {
4964 case 5:
4965 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
4966 break;
4967 case 7:
4968 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
4969 break;
4970 case 10:
4971 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
4972 break;
4973 case 14:
4974 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
4975 break;
4976 }
4977 if (INTEL_INFO(dev)->gen >= 4)
4978 dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
4979 } else {
4980 if (is_lvds) {
4981 dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4982 } else {
4983 if (clock.p1 == 2)
4984 dpll |= PLL_P1_DIVIDE_BY_TWO;
4985 else
4986 dpll |= (clock.p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4987 if (clock.p2 == 4)
4988 dpll |= PLL_P2_DIVIDE_BY_4;
4989 }
4990 }
4991
4992 if (is_sdvo && is_tv)
4993 dpll |= PLL_REF_INPUT_TVCLKINBC;
4994 else if (is_tv)
4995 /* XXX: just matching BIOS for now */
4996 /* dpll |= PLL_REF_INPUT_TVCLKINBC; */
4997 dpll |= 3;
4998 else if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2)
4999 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
5000 else
5001 dpll |= PLL_REF_INPUT_DREFCLK;
5002
5003 /* setup pipeconf */
5004 pipeconf = I915_READ(PIPECONF(pipe));
5005
5006 /* Set up the display plane register */
5007 dspcntr = DISPPLANE_GAMMA_ENABLE;
5008
5009 /* Ironlake's plane is forced to pipe, bit 24 is to
5010 enable color space conversion */
5011 if (pipe == 0)
5012 dspcntr &= ~DISPPLANE_SEL_PIPE_MASK;
5013 else
5014 dspcntr |= DISPPLANE_SEL_PIPE_B;
5015
5016 if (pipe == 0 && INTEL_INFO(dev)->gen < 4) {
5017 /* Enable pixel doubling when the dot clock is > 90% of the (display)
5018 * core speed.
5019 *
5020 * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
5021 * pipe == 0 check?
5022 */
5023 if (mode->clock >
5024 dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
5025 pipeconf |= PIPECONF_DOUBLE_WIDE;
5026 else
5027 pipeconf &= ~PIPECONF_DOUBLE_WIDE;
5028 }
5029
5030 /* default to 8bpc */
5031 pipeconf &= ~(PIPECONF_BPP_MASK | PIPECONF_DITHER_EN);
5032 if (is_dp) {
5033 if (mode->private_flags & INTEL_MODE_DP_FORCE_6BPC) {
5034 pipeconf |= PIPECONF_BPP_6 |
5035 PIPECONF_DITHER_EN |
5036 PIPECONF_DITHER_TYPE_SP;
5037 }
5038 }
5039
5040 dpll |= DPLL_VCO_ENABLE;
5041
5042 DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
5043 drm_mode_debug_printmodeline(mode);
5044
5045 I915_WRITE(FP0(pipe), fp);
5046 I915_WRITE(DPLL(pipe), dpll & ~DPLL_VCO_ENABLE);
5047
5048 POSTING_READ(DPLL(pipe));
5049 udelay(150);
5050
5051 /* The LVDS pin pair needs to be on before the DPLLs are enabled.
5052 * This is an exception to the general rule that mode_set doesn't turn
5053 * things on.
5054 */
5055 if (is_lvds) {
5056 temp = I915_READ(LVDS);
5057 temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
5058 if (pipe == 1) {
5059 temp |= LVDS_PIPEB_SELECT;
5060 } else {
5061 temp &= ~LVDS_PIPEB_SELECT;
5062 }
5063 /* set the corresponsding LVDS_BORDER bit */
5064 temp |= dev_priv->lvds_border_bits;
5065 /* Set the B0-B3 data pairs corresponding to whether we're going to
5066 * set the DPLLs for dual-channel mode or not.
5067 */
5068 if (clock.p2 == 7)
5069 temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
5070 else
5071 temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
5072
5073 /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
5074 * appropriately here, but we need to look more thoroughly into how
5075 * panels behave in the two modes.
5076 */
5077 /* set the dithering flag on LVDS as needed */
5078 if (INTEL_INFO(dev)->gen >= 4) {
5079 if (dev_priv->lvds_dither)
5080 temp |= LVDS_ENABLE_DITHER;
5081 else
5082 temp &= ~LVDS_ENABLE_DITHER;
5083 }
5084 if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
5085 lvds_sync |= LVDS_HSYNC_POLARITY;
5086 if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
5087 lvds_sync |= LVDS_VSYNC_POLARITY;
5088 if ((temp & (LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY))
5089 != lvds_sync) {
5090 char flags[2] = "-+";
5091 DRM_INFO("Changing LVDS panel from "
5092 "(%chsync, %cvsync) to (%chsync, %cvsync)\n",
5093 flags[!(temp & LVDS_HSYNC_POLARITY)],
5094 flags[!(temp & LVDS_VSYNC_POLARITY)],
5095 flags[!(lvds_sync & LVDS_HSYNC_POLARITY)],
5096 flags[!(lvds_sync & LVDS_VSYNC_POLARITY)]);
5097 temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
5098 temp |= lvds_sync;
5099 }
5100 I915_WRITE(LVDS, temp);
5101 }
5102
5103 if (is_dp) {
5104 intel_dp_set_m_n(crtc, mode, adjusted_mode);
5105 }
5106
5107 I915_WRITE(DPLL(pipe), dpll);
5108
5109 /* Wait for the clocks to stabilize. */
5110 POSTING_READ(DPLL(pipe));
5111 udelay(150);
5112
5113 if (INTEL_INFO(dev)->gen >= 4) {
5114 temp = 0;
5115 if (is_sdvo) {
5116 temp = intel_mode_get_pixel_multiplier(adjusted_mode);
5117 if (temp > 1)
5118 temp = (temp - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT;
5119 else
5120 temp = 0;
5121 }
5122 I915_WRITE(DPLL_MD(pipe), temp);
5123 } else {
5124 /* The pixel multiplier can only be updated once the
5125 * DPLL is enabled and the clocks are stable.
5126 *
5127 * So write it again.
5128 */
5129 I915_WRITE(DPLL(pipe), dpll);
5130 }
5131
5132 intel_crtc->lowfreq_avail = false;
5133 if (is_lvds && has_reduced_clock && i915_powersave) {
5134 I915_WRITE(FP1(pipe), fp2);
5135 intel_crtc->lowfreq_avail = true;
5136 if (HAS_PIPE_CXSR(dev)) {
5137 DRM_DEBUG_KMS("enabling CxSR downclocking\n");
5138 pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
5139 }
5140 } else {
5141 I915_WRITE(FP1(pipe), fp);
5142 if (HAS_PIPE_CXSR(dev)) {
5143 DRM_DEBUG_KMS("disabling CxSR downclocking\n");
5144 pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
5145 }
5146 }
5147
5148 if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
5149 pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
5150 /* the chip adds 2 halflines automatically */
5151 adjusted_mode->crtc_vdisplay -= 1;
5152 adjusted_mode->crtc_vtotal -= 1;
5153 adjusted_mode->crtc_vblank_start -= 1;
5154 adjusted_mode->crtc_vblank_end -= 1;
5155 adjusted_mode->crtc_vsync_end -= 1;
5156 adjusted_mode->crtc_vsync_start -= 1;
5157 } else
5158 pipeconf &= ~PIPECONF_INTERLACE_MASK; /* progressive */
5159
5160 I915_WRITE(HTOTAL(pipe),
5161 (adjusted_mode->crtc_hdisplay - 1) |
5162 ((adjusted_mode->crtc_htotal - 1) << 16));
5163 I915_WRITE(HBLANK(pipe),
5164 (adjusted_mode->crtc_hblank_start - 1) |
5165 ((adjusted_mode->crtc_hblank_end - 1) << 16));
5166 I915_WRITE(HSYNC(pipe),
5167 (adjusted_mode->crtc_hsync_start - 1) |
5168 ((adjusted_mode->crtc_hsync_end - 1) << 16));
5169
5170 I915_WRITE(VTOTAL(pipe),
5171 (adjusted_mode->crtc_vdisplay - 1) |
5172 ((adjusted_mode->crtc_vtotal - 1) << 16));
5173 I915_WRITE(VBLANK(pipe),
5174 (adjusted_mode->crtc_vblank_start - 1) |
5175 ((adjusted_mode->crtc_vblank_end - 1) << 16));
5176 I915_WRITE(VSYNC(pipe),
5177 (adjusted_mode->crtc_vsync_start - 1) |
5178 ((adjusted_mode->crtc_vsync_end - 1) << 16));
5179
5180 /* pipesrc and dspsize control the size that is scaled from,
5181 * which should always be the user's requested size.
5182 */
5183 I915_WRITE(DSPSIZE(plane),
5184 ((mode->vdisplay - 1) << 16) |
5185 (mode->hdisplay - 1));
5186 I915_WRITE(DSPPOS(plane), 0);
5187 I915_WRITE(PIPESRC(pipe),
5188 ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
5189
5190 I915_WRITE(PIPECONF(pipe), pipeconf);
5191 POSTING_READ(PIPECONF(pipe));
5192 intel_enable_pipe(dev_priv, pipe, false);
5193
5194 intel_wait_for_vblank(dev, pipe);
5195
5196 I915_WRITE(DSPCNTR(plane), dspcntr);
5197 POSTING_READ(DSPCNTR(plane));
5198 intel_enable_plane(dev_priv, plane, pipe);
5199
5200 ret = intel_pipe_set_base(crtc, x, y, old_fb);
5201
5202 intel_update_watermarks(dev);
5203
5204 return ret;
5205 }
5206
5207 /*
5208 * Initialize reference clocks when the driver loads
5209 */
5210 void ironlake_init_pch_refclk(struct drm_device *dev)
5211 {
5212 struct drm_i915_private *dev_priv = dev->dev_private;
5213 struct drm_mode_config *mode_config = &dev->mode_config;
5214 struct intel_encoder *encoder;
5215 u32 temp;
5216 bool has_lvds = false;
5217 bool has_cpu_edp = false;
5218 bool has_pch_edp = false;
5219 bool has_panel = false;
5220 bool has_ck505 = false;
5221 bool can_ssc = false;
5222
5223 /* We need to take the global config into account */
5224 list_for_each_entry(encoder, &mode_config->encoder_list,
5225 base.head) {
5226 switch (encoder->type) {
5227 case INTEL_OUTPUT_LVDS:
5228 has_panel = true;
5229 has_lvds = true;
5230 break;
5231 case INTEL_OUTPUT_EDP:
5232 has_panel = true;
5233 if (intel_encoder_is_pch_edp(&encoder->base))
5234 has_pch_edp = true;
5235 else
5236 has_cpu_edp = true;
5237 break;
5238 }
5239 }
5240
5241 if (HAS_PCH_IBX(dev)) {
5242 has_ck505 = dev_priv->display_clock_mode;
5243 can_ssc = has_ck505;
5244 } else {
5245 has_ck505 = false;
5246 can_ssc = true;
5247 }
5248
5249 DRM_DEBUG_KMS("has_panel %d has_lvds %d has_pch_edp %d has_cpu_edp %d has_ck505 %d\n",
5250 has_panel, has_lvds, has_pch_edp, has_cpu_edp,
5251 has_ck505);
5252
5253 /* Ironlake: try to setup display ref clock before DPLL
5254 * enabling. This is only under driver's control after
5255 * PCH B stepping, previous chipset stepping should be
5256 * ignoring this setting.
5257 */
5258 temp = I915_READ(PCH_DREF_CONTROL);
5259 /* Always enable nonspread source */
5260 temp &= ~DREF_NONSPREAD_SOURCE_MASK;
5261
5262 if (has_ck505)
5263 temp |= DREF_NONSPREAD_CK505_ENABLE;
5264 else
5265 temp |= DREF_NONSPREAD_SOURCE_ENABLE;
5266
5267 if (has_panel) {
5268 temp &= ~DREF_SSC_SOURCE_MASK;
5269 temp |= DREF_SSC_SOURCE_ENABLE;
5270
5271 /* SSC must be turned on before enabling the CPU output */
5272 if (intel_panel_use_ssc(dev_priv) && can_ssc) {
5273 DRM_DEBUG_KMS("Using SSC on panel\n");
5274 temp |= DREF_SSC1_ENABLE;
5275 }
5276
5277 /* Get SSC going before enabling the outputs */
5278 I915_WRITE(PCH_DREF_CONTROL, temp);
5279 POSTING_READ(PCH_DREF_CONTROL);
5280 udelay(200);
5281
5282 temp &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
5283
5284 /* Enable CPU source on CPU attached eDP */
5285 if (has_cpu_edp) {
5286 if (intel_panel_use_ssc(dev_priv) && can_ssc) {
5287 DRM_DEBUG_KMS("Using SSC on eDP\n");
5288 temp |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
5289 }
5290 else
5291 temp |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
5292 } else
5293 temp |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
5294
5295 I915_WRITE(PCH_DREF_CONTROL, temp);
5296 POSTING_READ(PCH_DREF_CONTROL);
5297 udelay(200);
5298 } else {
5299 DRM_DEBUG_KMS("Disabling SSC entirely\n");
5300
5301 temp &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
5302
5303 /* Turn off CPU output */
5304 temp |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
5305
5306 I915_WRITE(PCH_DREF_CONTROL, temp);
5307 POSTING_READ(PCH_DREF_CONTROL);
5308 udelay(200);
5309
5310 /* Turn off the SSC source */
5311 temp &= ~DREF_SSC_SOURCE_MASK;
5312 temp |= DREF_SSC_SOURCE_DISABLE;
5313
5314 /* Turn off SSC1 */
5315 temp &= ~ DREF_SSC1_ENABLE;
5316
5317 I915_WRITE(PCH_DREF_CONTROL, temp);
5318 POSTING_READ(PCH_DREF_CONTROL);
5319 udelay(200);
5320 }
5321 }
5322
5323 static int ironlake_get_refclk(struct drm_crtc *crtc)
5324 {
5325 struct drm_device *dev = crtc->dev;
5326 struct drm_i915_private *dev_priv = dev->dev_private;
5327 struct intel_encoder *encoder;
5328 struct drm_mode_config *mode_config = &dev->mode_config;
5329 struct intel_encoder *edp_encoder = NULL;
5330 int num_connectors = 0;
5331 bool is_lvds = false;
5332
5333 list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
5334 if (encoder->base.crtc != crtc)
5335 continue;
5336
5337 switch (encoder->type) {
5338 case INTEL_OUTPUT_LVDS:
5339 is_lvds = true;
5340 break;
5341 case INTEL_OUTPUT_EDP:
5342 edp_encoder = encoder;
5343 break;
5344 }
5345 num_connectors++;
5346 }
5347
5348 if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
5349 DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
5350 dev_priv->lvds_ssc_freq);
5351 return dev_priv->lvds_ssc_freq * 1000;
5352 }
5353
5354 return 120000;
5355 }
5356
5357 static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
5358 struct drm_display_mode *mode,
5359 struct drm_display_mode *adjusted_mode,
5360 int x, int y,
5361 struct drm_framebuffer *old_fb)
5362 {
5363 struct drm_device *dev = crtc->dev;
5364 struct drm_i915_private *dev_priv = dev->dev_private;
5365 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5366 int pipe = intel_crtc->pipe;
5367 int plane = intel_crtc->plane;
5368 int refclk, num_connectors = 0;
5369 intel_clock_t clock, reduced_clock;
5370 u32 dpll, fp = 0, fp2 = 0, dspcntr, pipeconf;
5371 bool ok, has_reduced_clock = false, is_sdvo = false;
5372 bool is_crt = false, is_lvds = false, is_tv = false, is_dp = false;
5373 struct intel_encoder *has_edp_encoder = NULL;
5374 struct drm_mode_config *mode_config = &dev->mode_config;
5375 struct intel_encoder *encoder;
5376 const intel_limit_t *limit;
5377 int ret;
5378 struct fdi_m_n m_n = {0};
5379 u32 temp;
5380 u32 lvds_sync = 0;
5381 int target_clock, pixel_multiplier, lane, link_bw, factor;
5382 unsigned int pipe_bpp;
5383 bool dither;
5384
5385 list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
5386 if (encoder->base.crtc != crtc)
5387 continue;
5388
5389 switch (encoder->type) {
5390 case INTEL_OUTPUT_LVDS:
5391 is_lvds = true;
5392 break;
5393 case INTEL_OUTPUT_SDVO:
5394 case INTEL_OUTPUT_HDMI:
5395 is_sdvo = true;
5396 if (encoder->needs_tv_clock)
5397 is_tv = true;
5398 break;
5399 case INTEL_OUTPUT_TVOUT:
5400 is_tv = true;
5401 break;
5402 case INTEL_OUTPUT_ANALOG:
5403 is_crt = true;
5404 break;
5405 case INTEL_OUTPUT_DISPLAYPORT:
5406 is_dp = true;
5407 break;
5408 case INTEL_OUTPUT_EDP:
5409 has_edp_encoder = encoder;
5410 break;
5411 }
5412
5413 num_connectors++;
5414 }
5415
5416 refclk = ironlake_get_refclk(crtc);
5417
5418 /*
5419 * Returns a set of divisors for the desired target clock with the given
5420 * refclk, or FALSE. The returned values represent the clock equation:
5421 * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
5422 */
5423 limit = intel_limit(crtc, refclk);
5424 ok = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk, &clock);
5425 if (!ok) {
5426 DRM_ERROR("Couldn't find PLL settings for mode!\n");
5427 return -EINVAL;
5428 }
5429
5430 /* Ensure that the cursor is valid for the new mode before changing... */
5431 intel_crtc_update_cursor(crtc, true);
5432
5433 if (is_lvds && dev_priv->lvds_downclock_avail) {
5434 has_reduced_clock = limit->find_pll(limit, crtc,
5435 dev_priv->lvds_downclock,
5436 refclk,
5437 &reduced_clock);
5438 if (has_reduced_clock && (clock.p != reduced_clock.p)) {
5439 /*
5440 * If the different P is found, it means that we can't
5441 * switch the display clock by using the FP0/FP1.
5442 * In such case we will disable the LVDS downclock
5443 * feature.
5444 */
5445 DRM_DEBUG_KMS("Different P is found for "
5446 "LVDS clock/downclock\n");
5447 has_reduced_clock = 0;
5448 }
5449 }
5450 /* SDVO TV has fixed PLL values depend on its clock range,
5451 this mirrors vbios setting. */
5452 if (is_sdvo && is_tv) {
5453 if (adjusted_mode->clock >= 100000
5454 && adjusted_mode->clock < 140500) {
5455 clock.p1 = 2;
5456 clock.p2 = 10;
5457 clock.n = 3;
5458 clock.m1 = 16;
5459 clock.m2 = 8;
5460 } else if (adjusted_mode->clock >= 140500
5461 && adjusted_mode->clock <= 200000) {
5462 clock.p1 = 1;
5463 clock.p2 = 10;
5464 clock.n = 6;
5465 clock.m1 = 12;
5466 clock.m2 = 8;
5467 }
5468 }
5469
5470 /* FDI link */
5471 pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
5472 lane = 0;
5473 /* CPU eDP doesn't require FDI link, so just set DP M/N
5474 according to current link config */
5475 if (has_edp_encoder &&
5476 !intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
5477 target_clock = mode->clock;
5478 intel_edp_link_config(has_edp_encoder,
5479 &lane, &link_bw);
5480 } else {
5481 /* [e]DP over FDI requires target mode clock
5482 instead of link clock */
5483 if (is_dp || intel_encoder_is_pch_edp(&has_edp_encoder->base))
5484 target_clock = mode->clock;
5485 else
5486 target_clock = adjusted_mode->clock;
5487
5488 /* FDI is a binary signal running at ~2.7GHz, encoding
5489 * each output octet as 10 bits. The actual frequency
5490 * is stored as a divider into a 100MHz clock, and the
5491 * mode pixel clock is stored in units of 1KHz.
5492 * Hence the bw of each lane in terms of the mode signal
5493 * is:
5494 */
5495 link_bw = intel_fdi_link_freq(dev) * MHz(100)/KHz(1)/10;
5496 }
5497
5498 /* determine panel color depth */
5499 temp = I915_READ(PIPECONF(pipe));
5500 temp &= ~PIPE_BPC_MASK;
5501 dither = intel_choose_pipe_bpp_dither(crtc, &pipe_bpp, mode);
5502 switch (pipe_bpp) {
5503 case 18:
5504 temp |= PIPE_6BPC;
5505 break;
5506 case 24:
5507 temp |= PIPE_8BPC;
5508 break;
5509 case 30:
5510 temp |= PIPE_10BPC;
5511 break;
5512 case 36:
5513 temp |= PIPE_12BPC;
5514 break;
5515 default:
5516 WARN(1, "intel_choose_pipe_bpp returned invalid value %d\n",
5517 pipe_bpp);
5518 temp |= PIPE_8BPC;
5519 pipe_bpp = 24;
5520 break;
5521 }
5522
5523 intel_crtc->bpp = pipe_bpp;
5524 I915_WRITE(PIPECONF(pipe), temp);
5525
5526 if (!lane) {
5527 /*
5528 * Account for spread spectrum to avoid
5529 * oversubscribing the link. Max center spread
5530 * is 2.5%; use 5% for safety's sake.
5531 */
5532 u32 bps = target_clock * intel_crtc->bpp * 21 / 20;
5533 lane = bps / (link_bw * 8) + 1;
5534 }
5535
5536 intel_crtc->fdi_lanes = lane;
5537
5538 if (pixel_multiplier > 1)
5539 link_bw *= pixel_multiplier;
5540 ironlake_compute_m_n(intel_crtc->bpp, lane, target_clock, link_bw,
5541 &m_n);
5542
5543 fp = clock.n << 16 | clock.m1 << 8 | clock.m2;
5544 if (has_reduced_clock)
5545 fp2 = reduced_clock.n << 16 | reduced_clock.m1 << 8 |
5546 reduced_clock.m2;
5547
5548 /* Enable autotuning of the PLL clock (if permissible) */
5549 factor = 21;
5550 if (is_lvds) {
5551 if ((intel_panel_use_ssc(dev_priv) &&
5552 dev_priv->lvds_ssc_freq == 100) ||
5553 (I915_READ(PCH_LVDS) & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP)
5554 factor = 25;
5555 } else if (is_sdvo && is_tv)
5556 factor = 20;
5557
5558 if (clock.m < factor * clock.n)
5559 fp |= FP_CB_TUNE;
5560
5561 dpll = 0;
5562
5563 if (is_lvds)
5564 dpll |= DPLLB_MODE_LVDS;
5565 else
5566 dpll |= DPLLB_MODE_DAC_SERIAL;
5567 if (is_sdvo) {
5568 int pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
5569 if (pixel_multiplier > 1) {
5570 dpll |= (pixel_multiplier - 1) << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
5571 }
5572 dpll |= DPLL_DVO_HIGH_SPEED;
5573 }
5574 if (is_dp || intel_encoder_is_pch_edp(&has_edp_encoder->base))
5575 dpll |= DPLL_DVO_HIGH_SPEED;
5576
5577 /* compute bitmask from p1 value */
5578 dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
5579 /* also FPA1 */
5580 dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
5581
5582 switch (clock.p2) {
5583 case 5:
5584 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
5585 break;
5586 case 7:
5587 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
5588 break;
5589 case 10:
5590 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
5591 break;
5592 case 14:
5593 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
5594 break;
5595 }
5596
5597 if (is_sdvo && is_tv)
5598 dpll |= PLL_REF_INPUT_TVCLKINBC;
5599 else if (is_tv)
5600 /* XXX: just matching BIOS for now */
5601 /* dpll |= PLL_REF_INPUT_TVCLKINBC; */
5602 dpll |= 3;
5603 else if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2)
5604 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
5605 else
5606 dpll |= PLL_REF_INPUT_DREFCLK;
5607
5608 /* setup pipeconf */
5609 pipeconf = I915_READ(PIPECONF(pipe));
5610
5611 /* Set up the display plane register */
5612 dspcntr = DISPPLANE_GAMMA_ENABLE;
5613
5614 DRM_DEBUG_KMS("Mode for pipe %d:\n", pipe);
5615 drm_mode_debug_printmodeline(mode);
5616
5617 /* PCH eDP needs FDI, but CPU eDP does not */
5618 if (!intel_crtc->no_pll) {
5619 if (!has_edp_encoder ||
5620 intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
5621 I915_WRITE(PCH_FP0(pipe), fp);
5622 I915_WRITE(PCH_DPLL(pipe), dpll & ~DPLL_VCO_ENABLE);
5623
5624 POSTING_READ(PCH_DPLL(pipe));
5625 udelay(150);
5626 }
5627 } else {
5628 if (dpll == (I915_READ(PCH_DPLL(0)) & 0x7fffffff) &&
5629 fp == I915_READ(PCH_FP0(0))) {
5630 intel_crtc->use_pll_a = true;
5631 DRM_DEBUG_KMS("using pipe a dpll\n");
5632 } else if (dpll == (I915_READ(PCH_DPLL(1)) & 0x7fffffff) &&
5633 fp == I915_READ(PCH_FP0(1))) {
5634 intel_crtc->use_pll_a = false;
5635 DRM_DEBUG_KMS("using pipe b dpll\n");
5636 } else {
5637 DRM_DEBUG_KMS("no matching PLL configuration for pipe 2\n");
5638 return -EINVAL;
5639 }
5640 }
5641
5642 /* The LVDS pin pair needs to be on before the DPLLs are enabled.
5643 * This is an exception to the general rule that mode_set doesn't turn
5644 * things on.
5645 */
5646 if (is_lvds) {
5647 temp = I915_READ(PCH_LVDS);
5648 temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
5649 if (HAS_PCH_CPT(dev))
5650 temp |= PORT_TRANS_SEL_CPT(pipe);
5651 else if (pipe == 1)
5652 temp |= LVDS_PIPEB_SELECT;
5653 else
5654 temp &= ~LVDS_PIPEB_SELECT;
5655
5656 /* set the corresponsding LVDS_BORDER bit */
5657 temp |= dev_priv->lvds_border_bits;
5658 /* Set the B0-B3 data pairs corresponding to whether we're going to
5659 * set the DPLLs for dual-channel mode or not.
5660 */
5661 if (clock.p2 == 7)
5662 temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
5663 else
5664 temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
5665
5666 /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
5667 * appropriately here, but we need to look more thoroughly into how
5668 * panels behave in the two modes.
5669 */
5670 if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
5671 lvds_sync |= LVDS_HSYNC_POLARITY;
5672 if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
5673 lvds_sync |= LVDS_VSYNC_POLARITY;
5674 if ((temp & (LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY))
5675 != lvds_sync) {
5676 char flags[2] = "-+";
5677 DRM_INFO("Changing LVDS panel from "
5678 "(%chsync, %cvsync) to (%chsync, %cvsync)\n",
5679 flags[!(temp & LVDS_HSYNC_POLARITY)],
5680 flags[!(temp & LVDS_VSYNC_POLARITY)],
5681 flags[!(lvds_sync & LVDS_HSYNC_POLARITY)],
5682 flags[!(lvds_sync & LVDS_VSYNC_POLARITY)]);
5683 temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
5684 temp |= lvds_sync;
5685 }
5686 I915_WRITE(PCH_LVDS, temp);
5687 }
5688
5689 pipeconf &= ~PIPECONF_DITHER_EN;
5690 pipeconf &= ~PIPECONF_DITHER_TYPE_MASK;
5691 if ((is_lvds && dev_priv->lvds_dither) || dither) {
5692 pipeconf |= PIPECONF_DITHER_EN;
5693 pipeconf |= PIPECONF_DITHER_TYPE_SP;
5694 }
5695 if (is_dp || intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
5696 intel_dp_set_m_n(crtc, mode, adjusted_mode);
5697 } else {
5698 /* For non-DP output, clear any trans DP clock recovery setting.*/
5699 I915_WRITE(TRANSDATA_M1(pipe), 0);
5700 I915_WRITE(TRANSDATA_N1(pipe), 0);
5701 I915_WRITE(TRANSDPLINK_M1(pipe), 0);
5702 I915_WRITE(TRANSDPLINK_N1(pipe), 0);
5703 }
5704
5705 if (!intel_crtc->no_pll &&
5706 (!has_edp_encoder ||
5707 intel_encoder_is_pch_edp(&has_edp_encoder->base))) {
5708 I915_WRITE(PCH_DPLL(pipe), dpll);
5709
5710 /* Wait for the clocks to stabilize. */
5711 POSTING_READ(PCH_DPLL(pipe));
5712 udelay(150);
5713
5714 /* The pixel multiplier can only be updated once the
5715 * DPLL is enabled and the clocks are stable.
5716 *
5717 * So write it again.
5718 */
5719 I915_WRITE(PCH_DPLL(pipe), dpll);
5720 }
5721
5722 intel_crtc->lowfreq_avail = false;
5723 if (!intel_crtc->no_pll) {
5724 if (is_lvds && has_reduced_clock && i915_powersave) {
5725 I915_WRITE(PCH_FP1(pipe), fp2);
5726 intel_crtc->lowfreq_avail = true;
5727 if (HAS_PIPE_CXSR(dev)) {
5728 DRM_DEBUG_KMS("enabling CxSR downclocking\n");
5729 pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
5730 }
5731 } else {
5732 I915_WRITE(PCH_FP1(pipe), fp);
5733 if (HAS_PIPE_CXSR(dev)) {
5734 DRM_DEBUG_KMS("disabling CxSR downclocking\n");
5735 pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
5736 }
5737 }
5738 }
5739
5740 if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
5741 pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
5742 /* the chip adds 2 halflines automatically */
5743 adjusted_mode->crtc_vdisplay -= 1;
5744 adjusted_mode->crtc_vtotal -= 1;
5745 adjusted_mode->crtc_vblank_start -= 1;
5746 adjusted_mode->crtc_vblank_end -= 1;
5747 adjusted_mode->crtc_vsync_end -= 1;
5748 adjusted_mode->crtc_vsync_start -= 1;
5749 } else
5750 pipeconf &= ~PIPECONF_INTERLACE_W_FIELD_INDICATION; /* progressive */
5751
5752 I915_WRITE(HTOTAL(pipe),
5753 (adjusted_mode->crtc_hdisplay - 1) |
5754 ((adjusted_mode->crtc_htotal - 1) << 16));
5755 I915_WRITE(HBLANK(pipe),
5756 (adjusted_mode->crtc_hblank_start - 1) |
5757 ((adjusted_mode->crtc_hblank_end - 1) << 16));
5758 I915_WRITE(HSYNC(pipe),
5759 (adjusted_mode->crtc_hsync_start - 1) |
5760 ((adjusted_mode->crtc_hsync_end - 1) << 16));
5761
5762 I915_WRITE(VTOTAL(pipe),
5763 (adjusted_mode->crtc_vdisplay - 1) |
5764 ((adjusted_mode->crtc_vtotal - 1) << 16));
5765 I915_WRITE(VBLANK(pipe),
5766 (adjusted_mode->crtc_vblank_start - 1) |
5767 ((adjusted_mode->crtc_vblank_end - 1) << 16));
5768 I915_WRITE(VSYNC(pipe),
5769 (adjusted_mode->crtc_vsync_start - 1) |
5770 ((adjusted_mode->crtc_vsync_end - 1) << 16));
5771
5772 /* pipesrc controls the size that is scaled from, which should
5773 * always be the user's requested size.
5774 */
5775 I915_WRITE(PIPESRC(pipe),
5776 ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
5777
5778 I915_WRITE(PIPE_DATA_M1(pipe), TU_SIZE(m_n.tu) | m_n.gmch_m);
5779 I915_WRITE(PIPE_DATA_N1(pipe), m_n.gmch_n);
5780 I915_WRITE(PIPE_LINK_M1(pipe), m_n.link_m);
5781 I915_WRITE(PIPE_LINK_N1(pipe), m_n.link_n);
5782
5783 if (has_edp_encoder &&
5784 !intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
5785 ironlake_set_pll_edp(crtc, adjusted_mode->clock);
5786 }
5787
5788 I915_WRITE(PIPECONF(pipe), pipeconf);
5789 POSTING_READ(PIPECONF(pipe));
5790
5791 intel_wait_for_vblank(dev, pipe);
5792
5793 if (IS_GEN5(dev)) {
5794 /* enable address swizzle for tiling buffer */
5795 temp = I915_READ(DISP_ARB_CTL);
5796 I915_WRITE(DISP_ARB_CTL, temp | DISP_TILE_SURFACE_SWIZZLING);
5797 }
5798
5799 I915_WRITE(DSPCNTR(plane), dspcntr);
5800 POSTING_READ(DSPCNTR(plane));
5801
5802 ret = intel_pipe_set_base(crtc, x, y, old_fb);
5803
5804 intel_update_watermarks(dev);
5805
5806 return ret;
5807 }
5808
5809 static int intel_crtc_mode_set(struct drm_crtc *crtc,
5810 struct drm_display_mode *mode,
5811 struct drm_display_mode *adjusted_mode,
5812 int x, int y,
5813 struct drm_framebuffer *old_fb)
5814 {
5815 struct drm_device *dev = crtc->dev;
5816 struct drm_i915_private *dev_priv = dev->dev_private;
5817 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5818 int pipe = intel_crtc->pipe;
5819 int ret;
5820
5821 drm_vblank_pre_modeset(dev, pipe);
5822
5823 ret = dev_priv->display.crtc_mode_set(crtc, mode, adjusted_mode,
5824 x, y, old_fb);
5825
5826 drm_vblank_post_modeset(dev, pipe);
5827
5828 intel_crtc->dpms_mode = DRM_MODE_DPMS_ON;
5829
5830 return ret;
5831 }
5832
5833 static bool intel_eld_uptodate(struct drm_connector *connector,
5834 int reg_eldv, uint32_t bits_eldv,
5835 int reg_elda, uint32_t bits_elda,
5836 int reg_edid)
5837 {
5838 struct drm_i915_private *dev_priv = connector->dev->dev_private;
5839 uint8_t *eld = connector->eld;
5840 uint32_t i;
5841
5842 i = I915_READ(reg_eldv);
5843 i &= bits_eldv;
5844
5845 if (!eld[0])
5846 return !i;
5847
5848 if (!i)
5849 return false;
5850
5851 i = I915_READ(reg_elda);
5852 i &= ~bits_elda;
5853 I915_WRITE(reg_elda, i);
5854
5855 for (i = 0; i < eld[2]; i++)
5856 if (I915_READ(reg_edid) != *((uint32_t *)eld + i))
5857 return false;
5858
5859 return true;
5860 }
5861
5862 static void g4x_write_eld(struct drm_connector *connector,
5863 struct drm_crtc *crtc)
5864 {
5865 struct drm_i915_private *dev_priv = connector->dev->dev_private;
5866 uint8_t *eld = connector->eld;
5867 uint32_t eldv;
5868 uint32_t len;
5869 uint32_t i;
5870
5871 i = I915_READ(G4X_AUD_VID_DID);
5872
5873 if (i == INTEL_AUDIO_DEVBLC || i == INTEL_AUDIO_DEVCL)
5874 eldv = G4X_ELDV_DEVCL_DEVBLC;
5875 else
5876 eldv = G4X_ELDV_DEVCTG;
5877
5878 if (intel_eld_uptodate(connector,
5879 G4X_AUD_CNTL_ST, eldv,
5880 G4X_AUD_CNTL_ST, G4X_ELD_ADDR,
5881 G4X_HDMIW_HDMIEDID))
5882 return;
5883
5884 i = I915_READ(G4X_AUD_CNTL_ST);
5885 i &= ~(eldv | G4X_ELD_ADDR);
5886 len = (i >> 9) & 0x1f; /* ELD buffer size */
5887 I915_WRITE(G4X_AUD_CNTL_ST, i);
5888
5889 if (!eld[0])
5890 return;
5891
5892 len = min_t(uint8_t, eld[2], len);
5893 DRM_DEBUG_DRIVER("ELD size %d\n", len);
5894 for (i = 0; i < len; i++)
5895 I915_WRITE(G4X_HDMIW_HDMIEDID, *((uint32_t *)eld + i));
5896
5897 i = I915_READ(G4X_AUD_CNTL_ST);
5898 i |= eldv;
5899 I915_WRITE(G4X_AUD_CNTL_ST, i);
5900 }
5901
5902 static void ironlake_write_eld(struct drm_connector *connector,
5903 struct drm_crtc *crtc)
5904 {
5905 struct drm_i915_private *dev_priv = connector->dev->dev_private;
5906 uint8_t *eld = connector->eld;
5907 uint32_t eldv;
5908 uint32_t i;
5909 int len;
5910 int hdmiw_hdmiedid;
5911 int aud_cntl_st;
5912 int aud_cntrl_st2;
5913
5914 if (HAS_PCH_IBX(connector->dev)) {
5915 hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID_A;
5916 aud_cntl_st = IBX_AUD_CNTL_ST_A;
5917 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
5918 } else {
5919 hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID_A;
5920 aud_cntl_st = CPT_AUD_CNTL_ST_A;
5921 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
5922 }
5923
5924 i = to_intel_crtc(crtc)->pipe;
5925 hdmiw_hdmiedid += i * 0x100;
5926 aud_cntl_st += i * 0x100;
5927
5928 DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(i));
5929
5930 i = I915_READ(aud_cntl_st);
5931 i = (i >> 29) & 0x3; /* DIP_Port_Select, 0x1 = PortB */
5932 if (!i) {
5933 DRM_DEBUG_DRIVER("Audio directed to unknown port\n");
5934 /* operate blindly on all ports */
5935 eldv = IBX_ELD_VALIDB;
5936 eldv |= IBX_ELD_VALIDB << 4;
5937 eldv |= IBX_ELD_VALIDB << 8;
5938 } else {
5939 DRM_DEBUG_DRIVER("ELD on port %c\n", 'A' + i);
5940 eldv = IBX_ELD_VALIDB << ((i - 1) * 4);
5941 }
5942
5943 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
5944 DRM_DEBUG_DRIVER("ELD: DisplayPort detected\n");
5945 eld[5] |= (1 << 2); /* Conn_Type, 0x1 = DisplayPort */
5946 }
5947
5948 if (intel_eld_uptodate(connector,
5949 aud_cntrl_st2, eldv,
5950 aud_cntl_st, IBX_ELD_ADDRESS,
5951 hdmiw_hdmiedid))
5952 return;
5953
5954 i = I915_READ(aud_cntrl_st2);
5955 i &= ~eldv;
5956 I915_WRITE(aud_cntrl_st2, i);
5957
5958 if (!eld[0])
5959 return;
5960
5961 i = I915_READ(aud_cntl_st);
5962 i &= ~IBX_ELD_ADDRESS;
5963 I915_WRITE(aud_cntl_st, i);
5964
5965 len = min_t(uint8_t, eld[2], 21); /* 84 bytes of hw ELD buffer */
5966 DRM_DEBUG_DRIVER("ELD size %d\n", len);
5967 for (i = 0; i < len; i++)
5968 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
5969
5970 i = I915_READ(aud_cntrl_st2);
5971 i |= eldv;
5972 I915_WRITE(aud_cntrl_st2, i);
5973 }
5974
5975 void intel_write_eld(struct drm_encoder *encoder,
5976 struct drm_display_mode *mode)
5977 {
5978 struct drm_crtc *crtc = encoder->crtc;
5979 struct drm_connector *connector;
5980 struct drm_device *dev = encoder->dev;
5981 struct drm_i915_private *dev_priv = dev->dev_private;
5982
5983 connector = drm_select_eld(encoder, mode);
5984 if (!connector)
5985 return;
5986
5987 DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
5988 connector->base.id,
5989 drm_get_connector_name(connector),
5990 connector->encoder->base.id,
5991 drm_get_encoder_name(connector->encoder));
5992
5993 connector->eld[6] = drm_av_sync_delay(connector, mode) / 2;
5994
5995 if (dev_priv->display.write_eld)
5996 dev_priv->display.write_eld(connector, crtc);
5997 }
5998
5999 /** Loads the palette/gamma unit for the CRTC with the prepared values */
6000 void intel_crtc_load_lut(struct drm_crtc *crtc)
6001 {
6002 struct drm_device *dev = crtc->dev;
6003 struct drm_i915_private *dev_priv = dev->dev_private;
6004 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6005 int palreg = PALETTE(intel_crtc->pipe);
6006 int i;
6007
6008 /* The clocks have to be on to load the palette. */
6009 if (!crtc->enabled)
6010 return;
6011
6012 /* use legacy palette for Ironlake */
6013 if (HAS_PCH_SPLIT(dev))
6014 palreg = LGC_PALETTE(intel_crtc->pipe);
6015
6016 for (i = 0; i < 256; i++) {
6017 I915_WRITE(palreg + 4 * i,
6018 (intel_crtc->lut_r[i] << 16) |
6019 (intel_crtc->lut_g[i] << 8) |
6020 intel_crtc->lut_b[i]);
6021 }
6022 }
6023
6024 static void i845_update_cursor(struct drm_crtc *crtc, u32 base)
6025 {
6026 struct drm_device *dev = crtc->dev;
6027 struct drm_i915_private *dev_priv = dev->dev_private;
6028 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6029 bool visible = base != 0;
6030 u32 cntl;
6031
6032 if (intel_crtc->cursor_visible == visible)
6033 return;
6034
6035 cntl = I915_READ(_CURACNTR);
6036 if (visible) {
6037 /* On these chipsets we can only modify the base whilst
6038 * the cursor is disabled.
6039 */
6040 I915_WRITE(_CURABASE, base);
6041
6042 cntl &= ~(CURSOR_FORMAT_MASK);
6043 /* XXX width must be 64, stride 256 => 0x00 << 28 */
6044 cntl |= CURSOR_ENABLE |
6045 CURSOR_GAMMA_ENABLE |
6046 CURSOR_FORMAT_ARGB;
6047 } else
6048 cntl &= ~(CURSOR_ENABLE | CURSOR_GAMMA_ENABLE);
6049 I915_WRITE(_CURACNTR, cntl);
6050
6051 intel_crtc->cursor_visible = visible;
6052 }
6053
6054 static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base)
6055 {
6056 struct drm_device *dev = crtc->dev;
6057 struct drm_i915_private *dev_priv = dev->dev_private;
6058 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6059 int pipe = intel_crtc->pipe;
6060 bool visible = base != 0;
6061
6062 if (intel_crtc->cursor_visible != visible) {
6063 uint32_t cntl = I915_READ(CURCNTR(pipe));
6064 if (base) {
6065 cntl &= ~(CURSOR_MODE | MCURSOR_PIPE_SELECT);
6066 cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
6067 cntl |= pipe << 28; /* Connect to correct pipe */
6068 } else {
6069 cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
6070 cntl |= CURSOR_MODE_DISABLE;
6071 }
6072 I915_WRITE(CURCNTR(pipe), cntl);
6073
6074 intel_crtc->cursor_visible = visible;
6075 }
6076 /* and commit changes on next vblank */
6077 I915_WRITE(CURBASE(pipe), base);
6078 }
6079
6080 static void ivb_update_cursor(struct drm_crtc *crtc, u32 base)
6081 {
6082 struct drm_device *dev = crtc->dev;
6083 struct drm_i915_private *dev_priv = dev->dev_private;
6084 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6085 int pipe = intel_crtc->pipe;
6086 bool visible = base != 0;
6087
6088 if (intel_crtc->cursor_visible != visible) {
6089 uint32_t cntl = I915_READ(CURCNTR_IVB(pipe));
6090 if (base) {
6091 cntl &= ~CURSOR_MODE;
6092 cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
6093 } else {
6094 cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
6095 cntl |= CURSOR_MODE_DISABLE;
6096 }
6097 I915_WRITE(CURCNTR_IVB(pipe), cntl);
6098
6099 intel_crtc->cursor_visible = visible;
6100 }
6101 /* and commit changes on next vblank */
6102 I915_WRITE(CURBASE_IVB(pipe), base);
6103 }
6104
6105 /* If no-part of the cursor is visible on the framebuffer, then the GPU may hang... */
6106 static void intel_crtc_update_cursor(struct drm_crtc *crtc,
6107 bool on)
6108 {
6109 struct drm_device *dev = crtc->dev;
6110 struct drm_i915_private *dev_priv = dev->dev_private;
6111 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6112 int pipe = intel_crtc->pipe;
6113 int x = intel_crtc->cursor_x;
6114 int y = intel_crtc->cursor_y;
6115 u32 base, pos;
6116 bool visible;
6117
6118 pos = 0;
6119
6120 if (on && crtc->enabled && crtc->fb) {
6121 base = intel_crtc->cursor_addr;
6122 if (x > (int) crtc->fb->width)
6123 base = 0;
6124
6125 if (y > (int) crtc->fb->height)
6126 base = 0;
6127 } else
6128 base = 0;
6129
6130 if (x < 0) {
6131 if (x + intel_crtc->cursor_width < 0)
6132 base = 0;
6133
6134 pos |= CURSOR_POS_SIGN << CURSOR_X_SHIFT;
6135 x = -x;
6136 }
6137 pos |= x << CURSOR_X_SHIFT;
6138
6139 if (y < 0) {
6140 if (y + intel_crtc->cursor_height < 0)
6141 base = 0;
6142
6143 pos |= CURSOR_POS_SIGN << CURSOR_Y_SHIFT;
6144 y = -y;
6145 }
6146 pos |= y << CURSOR_Y_SHIFT;
6147
6148 visible = base != 0;
6149 if (!visible && !intel_crtc->cursor_visible)
6150 return;
6151
6152 if (IS_IVYBRIDGE(dev)) {
6153 I915_WRITE(CURPOS_IVB(pipe), pos);
6154 ivb_update_cursor(crtc, base);
6155 } else {
6156 I915_WRITE(CURPOS(pipe), pos);
6157 if (IS_845G(dev) || IS_I865G(dev))
6158 i845_update_cursor(crtc, base);
6159 else
6160 i9xx_update_cursor(crtc, base);
6161 }
6162
6163 if (visible)
6164 intel_mark_busy(dev, to_intel_framebuffer(crtc->fb)->obj);
6165 }
6166
6167 static int intel_crtc_cursor_set(struct drm_crtc *crtc,
6168 struct drm_file *file,
6169 uint32_t handle,
6170 uint32_t width, uint32_t height)
6171 {
6172 struct drm_device *dev = crtc->dev;
6173 struct drm_i915_private *dev_priv = dev->dev_private;
6174 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6175 struct drm_i915_gem_object *obj;
6176 uint32_t addr;
6177 int ret;
6178
6179 DRM_DEBUG_KMS("\n");
6180
6181 /* if we want to turn off the cursor ignore width and height */
6182 if (!handle) {
6183 DRM_DEBUG_KMS("cursor off\n");
6184 addr = 0;
6185 obj = NULL;
6186 mutex_lock(&dev->struct_mutex);
6187 goto finish;
6188 }
6189
6190 /* Currently we only support 64x64 cursors */
6191 if (width != 64 || height != 64) {
6192 DRM_ERROR("we currently only support 64x64 cursors\n");
6193 return -EINVAL;
6194 }
6195
6196 obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
6197 if (&obj->base == NULL)
6198 return -ENOENT;
6199
6200 if (obj->base.size < width * height * 4) {
6201 DRM_ERROR("buffer is to small\n");
6202 ret = -ENOMEM;
6203 goto fail;
6204 }
6205
6206 /* we only need to pin inside GTT if cursor is non-phy */
6207 mutex_lock(&dev->struct_mutex);
6208 if (!dev_priv->info->cursor_needs_physical) {
6209 if (obj->tiling_mode) {
6210 DRM_ERROR("cursor cannot be tiled\n");
6211 ret = -EINVAL;
6212 goto fail_locked;
6213 }
6214
6215 ret = i915_gem_object_pin_to_display_plane(obj, 0, NULL);
6216 if (ret) {
6217 DRM_ERROR("failed to move cursor bo into the GTT\n");
6218 goto fail_locked;
6219 }
6220
6221 ret = i915_gem_object_put_fence(obj);
6222 if (ret) {
6223 DRM_ERROR("failed to release fence for cursor");
6224 goto fail_unpin;
6225 }
6226
6227 addr = obj->gtt_offset;
6228 } else {
6229 int align = IS_I830(dev) ? 16 * 1024 : 256;
6230 ret = i915_gem_attach_phys_object(dev, obj,
6231 (intel_crtc->pipe == 0) ? I915_GEM_PHYS_CURSOR_0 : I915_GEM_PHYS_CURSOR_1,
6232 align);
6233 if (ret) {
6234 DRM_ERROR("failed to attach phys object\n");
6235 goto fail_locked;
6236 }
6237 addr = obj->phys_obj->handle->busaddr;
6238 }
6239
6240 if (IS_GEN2(dev))
6241 I915_WRITE(CURSIZE, (height << 12) | width);
6242
6243 finish:
6244 if (intel_crtc->cursor_bo) {
6245 if (dev_priv->info->cursor_needs_physical) {
6246 if (intel_crtc->cursor_bo != obj)
6247 i915_gem_detach_phys_object(dev, intel_crtc->cursor_bo);
6248 } else
6249 i915_gem_object_unpin(intel_crtc->cursor_bo);
6250 drm_gem_object_unreference(&intel_crtc->cursor_bo->base);
6251 }
6252
6253 mutex_unlock(&dev->struct_mutex);
6254
6255 intel_crtc->cursor_addr = addr;
6256 intel_crtc->cursor_bo = obj;
6257 intel_crtc->cursor_width = width;
6258 intel_crtc->cursor_height = height;
6259
6260 intel_crtc_update_cursor(crtc, true);
6261
6262 return 0;
6263 fail_unpin:
6264 i915_gem_object_unpin(obj);
6265 fail_locked:
6266 mutex_unlock(&dev->struct_mutex);
6267 fail:
6268 drm_gem_object_unreference_unlocked(&obj->base);
6269 return ret;
6270 }
6271
6272 static int intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
6273 {
6274 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6275
6276 intel_crtc->cursor_x = x;
6277 intel_crtc->cursor_y = y;
6278
6279 intel_crtc_update_cursor(crtc, true);
6280
6281 return 0;
6282 }
6283
6284 /** Sets the color ramps on behalf of RandR */
6285 void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
6286 u16 blue, int regno)
6287 {
6288 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6289
6290 intel_crtc->lut_r[regno] = red >> 8;
6291 intel_crtc->lut_g[regno] = green >> 8;
6292 intel_crtc->lut_b[regno] = blue >> 8;
6293 }
6294
6295 void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
6296 u16 *blue, int regno)
6297 {
6298 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6299
6300 *red = intel_crtc->lut_r[regno] << 8;
6301 *green = intel_crtc->lut_g[regno] << 8;
6302 *blue = intel_crtc->lut_b[regno] << 8;
6303 }
6304
6305 static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
6306 u16 *blue, uint32_t start, uint32_t size)
6307 {
6308 int end = (start + size > 256) ? 256 : start + size, i;
6309 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6310
6311 for (i = start; i < end; i++) {
6312 intel_crtc->lut_r[i] = red[i] >> 8;
6313 intel_crtc->lut_g[i] = green[i] >> 8;
6314 intel_crtc->lut_b[i] = blue[i] >> 8;
6315 }
6316
6317 intel_crtc_load_lut(crtc);
6318 }
6319
6320 /**
6321 * Get a pipe with a simple mode set on it for doing load-based monitor
6322 * detection.
6323 *
6324 * It will be up to the load-detect code to adjust the pipe as appropriate for
6325 * its requirements. The pipe will be connected to no other encoders.
6326 *
6327 * Currently this code will only succeed if there is a pipe with no encoders
6328 * configured for it. In the future, it could choose to temporarily disable
6329 * some outputs to free up a pipe for its use.
6330 *
6331 * \return crtc, or NULL if no pipes are available.
6332 */
6333
6334 /* VESA 640x480x72Hz mode to set on the pipe */
6335 static struct drm_display_mode load_detect_mode = {
6336 DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
6337 704, 832, 0, 480, 489, 491, 520, 0, DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
6338 };
6339
6340 static struct drm_framebuffer *
6341 intel_framebuffer_create(struct drm_device *dev,
6342 struct drm_mode_fb_cmd2 *mode_cmd,
6343 struct drm_i915_gem_object *obj)
6344 {
6345 struct intel_framebuffer *intel_fb;
6346 int ret;
6347
6348 intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
6349 if (!intel_fb) {
6350 drm_gem_object_unreference_unlocked(&obj->base);
6351 return ERR_PTR(-ENOMEM);
6352 }
6353
6354 ret = intel_framebuffer_init(dev, intel_fb, mode_cmd, obj);
6355 if (ret) {
6356 drm_gem_object_unreference_unlocked(&obj->base);
6357 kfree(intel_fb);
6358 return ERR_PTR(ret);
6359 }
6360
6361 return &intel_fb->base;
6362 }
6363
6364 static u32
6365 intel_framebuffer_pitch_for_width(int width, int bpp)
6366 {
6367 u32 pitch = DIV_ROUND_UP(width * bpp, 8);
6368 return ALIGN(pitch, 64);
6369 }
6370
6371 static u32
6372 intel_framebuffer_size_for_mode(struct drm_display_mode *mode, int bpp)
6373 {
6374 u32 pitch = intel_framebuffer_pitch_for_width(mode->hdisplay, bpp);
6375 return ALIGN(pitch * mode->vdisplay, PAGE_SIZE);
6376 }
6377
6378 static struct drm_framebuffer *
6379 intel_framebuffer_create_for_mode(struct drm_device *dev,
6380 struct drm_display_mode *mode,
6381 int depth, int bpp)
6382 {
6383 struct drm_i915_gem_object *obj;
6384 struct drm_mode_fb_cmd2 mode_cmd;
6385
6386 obj = i915_gem_alloc_object(dev,
6387 intel_framebuffer_size_for_mode(mode, bpp));
6388 if (obj == NULL)
6389 return ERR_PTR(-ENOMEM);
6390
6391 mode_cmd.width = mode->hdisplay;
6392 mode_cmd.height = mode->vdisplay;
6393 mode_cmd.pitches[0] = intel_framebuffer_pitch_for_width(mode_cmd.width,
6394 bpp);
6395 mode_cmd.pixel_format = 0;
6396
6397 return intel_framebuffer_create(dev, &mode_cmd, obj);
6398 }
6399
6400 static struct drm_framebuffer *
6401 mode_fits_in_fbdev(struct drm_device *dev,
6402 struct drm_display_mode *mode)
6403 {
6404 struct drm_i915_private *dev_priv = dev->dev_private;
6405 struct drm_i915_gem_object *obj;
6406 struct drm_framebuffer *fb;
6407
6408 if (dev_priv->fbdev == NULL)
6409 return NULL;
6410
6411 obj = dev_priv->fbdev->ifb.obj;
6412 if (obj == NULL)
6413 return NULL;
6414
6415 fb = &dev_priv->fbdev->ifb.base;
6416 if (fb->pitches[0] < intel_framebuffer_pitch_for_width(mode->hdisplay,
6417 fb->bits_per_pixel))
6418 return NULL;
6419
6420 if (obj->base.size < mode->vdisplay * fb->pitches[0])
6421 return NULL;
6422
6423 return fb;
6424 }
6425
6426 bool intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
6427 struct drm_connector *connector,
6428 struct drm_display_mode *mode,
6429 struct intel_load_detect_pipe *old)
6430 {
6431 struct intel_crtc *intel_crtc;
6432 struct drm_crtc *possible_crtc;
6433 struct drm_encoder *encoder = &intel_encoder->base;
6434 struct drm_crtc *crtc = NULL;
6435 struct drm_device *dev = encoder->dev;
6436 struct drm_framebuffer *old_fb;
6437 int i = -1;
6438
6439 DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
6440 connector->base.id, drm_get_connector_name(connector),
6441 encoder->base.id, drm_get_encoder_name(encoder));
6442
6443 /*
6444 * Algorithm gets a little messy:
6445 *
6446 * - if the connector already has an assigned crtc, use it (but make
6447 * sure it's on first)
6448 *
6449 * - try to find the first unused crtc that can drive this connector,
6450 * and use that if we find one
6451 */
6452
6453 /* See if we already have a CRTC for this connector */
6454 if (encoder->crtc) {
6455 crtc = encoder->crtc;
6456
6457 intel_crtc = to_intel_crtc(crtc);
6458 old->dpms_mode = intel_crtc->dpms_mode;
6459 old->load_detect_temp = false;
6460
6461 /* Make sure the crtc and connector are running */
6462 if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
6463 struct drm_encoder_helper_funcs *encoder_funcs;
6464 struct drm_crtc_helper_funcs *crtc_funcs;
6465
6466 crtc_funcs = crtc->helper_private;
6467 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
6468
6469 encoder_funcs = encoder->helper_private;
6470 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
6471 }
6472
6473 return true;
6474 }
6475
6476 /* Find an unused one (if possible) */
6477 list_for_each_entry(possible_crtc, &dev->mode_config.crtc_list, head) {
6478 i++;
6479 if (!(encoder->possible_crtcs & (1 << i)))
6480 continue;
6481 if (!possible_crtc->enabled) {
6482 crtc = possible_crtc;
6483 break;
6484 }
6485 }
6486
6487 /*
6488 * If we didn't find an unused CRTC, don't use any.
6489 */
6490 if (!crtc) {
6491 DRM_DEBUG_KMS("no pipe available for load-detect\n");
6492 return false;
6493 }
6494
6495 encoder->crtc = crtc;
6496 connector->encoder = encoder;
6497
6498 intel_crtc = to_intel_crtc(crtc);
6499 old->dpms_mode = intel_crtc->dpms_mode;
6500 old->load_detect_temp = true;
6501 old->release_fb = NULL;
6502
6503 if (!mode)
6504 mode = &load_detect_mode;
6505
6506 old_fb = crtc->fb;
6507
6508 /* We need a framebuffer large enough to accommodate all accesses
6509 * that the plane may generate whilst we perform load detection.
6510 * We can not rely on the fbcon either being present (we get called
6511 * during its initialisation to detect all boot displays, or it may
6512 * not even exist) or that it is large enough to satisfy the
6513 * requested mode.
6514 */
6515 crtc->fb = mode_fits_in_fbdev(dev, mode);
6516 if (crtc->fb == NULL) {
6517 DRM_DEBUG_KMS("creating tmp fb for load-detection\n");
6518 crtc->fb = intel_framebuffer_create_for_mode(dev, mode, 24, 32);
6519 old->release_fb = crtc->fb;
6520 } else
6521 DRM_DEBUG_KMS("reusing fbdev for load-detection framebuffer\n");
6522 if (IS_ERR(crtc->fb)) {
6523 DRM_DEBUG_KMS("failed to allocate framebuffer for load-detection\n");
6524 crtc->fb = old_fb;
6525 return false;
6526 }
6527
6528 if (!drm_crtc_helper_set_mode(crtc, mode, 0, 0, old_fb)) {
6529 DRM_DEBUG_KMS("failed to set mode on load-detect pipe\n");
6530 if (old->release_fb)
6531 old->release_fb->funcs->destroy(old->release_fb);
6532 crtc->fb = old_fb;
6533 return false;
6534 }
6535
6536 /* let the connector get through one full cycle before testing */
6537 intel_wait_for_vblank(dev, intel_crtc->pipe);
6538
6539 return true;
6540 }
6541
6542 void intel_release_load_detect_pipe(struct intel_encoder *intel_encoder,
6543 struct drm_connector *connector,
6544 struct intel_load_detect_pipe *old)
6545 {
6546 struct drm_encoder *encoder = &intel_encoder->base;
6547 struct drm_device *dev = encoder->dev;
6548 struct drm_crtc *crtc = encoder->crtc;
6549 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
6550 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
6551
6552 DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
6553 connector->base.id, drm_get_connector_name(connector),
6554 encoder->base.id, drm_get_encoder_name(encoder));
6555
6556 if (old->load_detect_temp) {
6557 connector->encoder = NULL;
6558 drm_helper_disable_unused_functions(dev);
6559
6560 if (old->release_fb)
6561 old->release_fb->funcs->destroy(old->release_fb);
6562
6563 return;
6564 }
6565
6566 /* Switch crtc and encoder back off if necessary */
6567 if (old->dpms_mode != DRM_MODE_DPMS_ON) {
6568 encoder_funcs->dpms(encoder, old->dpms_mode);
6569 crtc_funcs->dpms(crtc, old->dpms_mode);
6570 }
6571 }
6572
6573 /* Returns the clock of the currently programmed mode of the given pipe. */
6574 static int intel_crtc_clock_get(struct drm_device *dev, struct drm_crtc *crtc)
6575 {
6576 struct drm_i915_private *dev_priv = dev->dev_private;
6577 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6578 int pipe = intel_crtc->pipe;
6579 u32 dpll = I915_READ(DPLL(pipe));
6580 u32 fp;
6581 intel_clock_t clock;
6582
6583 if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
6584 fp = I915_READ(FP0(pipe));
6585 else
6586 fp = I915_READ(FP1(pipe));
6587
6588 clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
6589 if (IS_PINEVIEW(dev)) {
6590 clock.n = ffs((fp & FP_N_PINEVIEW_DIV_MASK) >> FP_N_DIV_SHIFT) - 1;
6591 clock.m2 = (fp & FP_M2_PINEVIEW_DIV_MASK) >> FP_M2_DIV_SHIFT;
6592 } else {
6593 clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
6594 clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
6595 }
6596
6597 if (!IS_GEN2(dev)) {
6598 if (IS_PINEVIEW(dev))
6599 clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_PINEVIEW) >>
6600 DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW);
6601 else
6602 clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
6603 DPLL_FPA01_P1_POST_DIV_SHIFT);
6604
6605 switch (dpll & DPLL_MODE_MASK) {
6606 case DPLLB_MODE_DAC_SERIAL:
6607 clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
6608 5 : 10;
6609 break;
6610 case DPLLB_MODE_LVDS:
6611 clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
6612 7 : 14;
6613 break;
6614 default:
6615 DRM_DEBUG_KMS("Unknown DPLL mode %08x in programmed "
6616 "mode\n", (int)(dpll & DPLL_MODE_MASK));
6617 return 0;
6618 }
6619
6620 /* XXX: Handle the 100Mhz refclk */
6621 intel_clock(dev, 96000, &clock);
6622 } else {
6623 bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);
6624
6625 if (is_lvds) {
6626 clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
6627 DPLL_FPA01_P1_POST_DIV_SHIFT);
6628 clock.p2 = 14;
6629
6630 if ((dpll & PLL_REF_INPUT_MASK) ==
6631 PLLB_REF_INPUT_SPREADSPECTRUMIN) {
6632 /* XXX: might not be 66MHz */
6633 intel_clock(dev, 66000, &clock);
6634 } else
6635 intel_clock(dev, 48000, &clock);
6636 } else {
6637 if (dpll & PLL_P1_DIVIDE_BY_TWO)
6638 clock.p1 = 2;
6639 else {
6640 clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
6641 DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
6642 }
6643 if (dpll & PLL_P2_DIVIDE_BY_4)
6644 clock.p2 = 4;
6645 else
6646 clock.p2 = 2;
6647
6648 intel_clock(dev, 48000, &clock);
6649 }
6650 }
6651
6652 /* XXX: It would be nice to validate the clocks, but we can't reuse
6653 * i830PllIsValid() because it relies on the xf86_config connector
6654 * configuration being accurate, which it isn't necessarily.
6655 */
6656
6657 return clock.dot;
6658 }
6659
6660 /** Returns the currently programmed mode of the given pipe. */
6661 struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
6662 struct drm_crtc *crtc)
6663 {
6664 struct drm_i915_private *dev_priv = dev->dev_private;
6665 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6666 int pipe = intel_crtc->pipe;
6667 struct drm_display_mode *mode;
6668 int htot = I915_READ(HTOTAL(pipe));
6669 int hsync = I915_READ(HSYNC(pipe));
6670 int vtot = I915_READ(VTOTAL(pipe));
6671 int vsync = I915_READ(VSYNC(pipe));
6672
6673 mode = kzalloc(sizeof(*mode), GFP_KERNEL);
6674 if (!mode)
6675 return NULL;
6676
6677 mode->clock = intel_crtc_clock_get(dev, crtc);
6678 mode->hdisplay = (htot & 0xffff) + 1;
6679 mode->htotal = ((htot & 0xffff0000) >> 16) + 1;
6680 mode->hsync_start = (hsync & 0xffff) + 1;
6681 mode->hsync_end = ((hsync & 0xffff0000) >> 16) + 1;
6682 mode->vdisplay = (vtot & 0xffff) + 1;
6683 mode->vtotal = ((vtot & 0xffff0000) >> 16) + 1;
6684 mode->vsync_start = (vsync & 0xffff) + 1;
6685 mode->vsync_end = ((vsync & 0xffff0000) >> 16) + 1;
6686
6687 drm_mode_set_name(mode);
6688 drm_mode_set_crtcinfo(mode, 0);
6689
6690 return mode;
6691 }
6692
6693 #define GPU_IDLE_TIMEOUT 500 /* ms */
6694
6695 /* When this timer fires, we've been idle for awhile */
6696 static void intel_gpu_idle_timer(unsigned long arg)
6697 {
6698 struct drm_device *dev = (struct drm_device *)arg;
6699 drm_i915_private_t *dev_priv = dev->dev_private;
6700
6701 if (!list_empty(&dev_priv->mm.active_list)) {
6702 /* Still processing requests, so just re-arm the timer. */
6703 mod_timer(&dev_priv->idle_timer, jiffies +
6704 msecs_to_jiffies(GPU_IDLE_TIMEOUT));
6705 return;
6706 }
6707
6708 dev_priv->busy = false;
6709 queue_work(dev_priv->wq, &dev_priv->idle_work);
6710 }
6711
6712 #define CRTC_IDLE_TIMEOUT 1000 /* ms */
6713
6714 static void intel_crtc_idle_timer(unsigned long arg)
6715 {
6716 struct intel_crtc *intel_crtc = (struct intel_crtc *)arg;
6717 struct drm_crtc *crtc = &intel_crtc->base;
6718 drm_i915_private_t *dev_priv = crtc->dev->dev_private;
6719 struct intel_framebuffer *intel_fb;
6720
6721 intel_fb = to_intel_framebuffer(crtc->fb);
6722 if (intel_fb && intel_fb->obj->active) {
6723 /* The framebuffer is still being accessed by the GPU. */
6724 mod_timer(&intel_crtc->idle_timer, jiffies +
6725 msecs_to_jiffies(CRTC_IDLE_TIMEOUT));
6726 return;
6727 }
6728
6729 intel_crtc->busy = false;
6730 queue_work(dev_priv->wq, &dev_priv->idle_work);
6731 }
6732
6733 static void intel_increase_pllclock(struct drm_crtc *crtc)
6734 {
6735 struct drm_device *dev = crtc->dev;
6736 drm_i915_private_t *dev_priv = dev->dev_private;
6737 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6738 int pipe = intel_crtc->pipe;
6739 int dpll_reg = DPLL(pipe);
6740 int dpll;
6741
6742 if (HAS_PCH_SPLIT(dev))
6743 return;
6744
6745 if (!dev_priv->lvds_downclock_avail)
6746 return;
6747
6748 dpll = I915_READ(dpll_reg);
6749 if (!HAS_PIPE_CXSR(dev) && (dpll & DISPLAY_RATE_SELECT_FPA1)) {
6750 DRM_DEBUG_DRIVER("upclocking LVDS\n");
6751
6752 /* Unlock panel regs */
6753 I915_WRITE(PP_CONTROL,
6754 I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
6755
6756 dpll &= ~DISPLAY_RATE_SELECT_FPA1;
6757 I915_WRITE(dpll_reg, dpll);
6758 intel_wait_for_vblank(dev, pipe);
6759
6760 dpll = I915_READ(dpll_reg);
6761 if (dpll & DISPLAY_RATE_SELECT_FPA1)
6762 DRM_DEBUG_DRIVER("failed to upclock LVDS!\n");
6763
6764 /* ...and lock them again */
6765 I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) & 0x3);
6766 }
6767
6768 /* Schedule downclock */
6769 mod_timer(&intel_crtc->idle_timer, jiffies +
6770 msecs_to_jiffies(CRTC_IDLE_TIMEOUT));
6771 }
6772
6773 static void intel_decrease_pllclock(struct drm_crtc *crtc)
6774 {
6775 struct drm_device *dev = crtc->dev;
6776 drm_i915_private_t *dev_priv = dev->dev_private;
6777 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6778 int pipe = intel_crtc->pipe;
6779 int dpll_reg = DPLL(pipe);
6780 int dpll = I915_READ(dpll_reg);
6781
6782 if (HAS_PCH_SPLIT(dev))
6783 return;
6784
6785 if (!dev_priv->lvds_downclock_avail)
6786 return;
6787
6788 /*
6789 * Since this is called by a timer, we should never get here in
6790 * the manual case.
6791 */
6792 if (!HAS_PIPE_CXSR(dev) && intel_crtc->lowfreq_avail) {
6793 DRM_DEBUG_DRIVER("downclocking LVDS\n");
6794
6795 /* Unlock panel regs */
6796 I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) |
6797 PANEL_UNLOCK_REGS);
6798
6799 dpll |= DISPLAY_RATE_SELECT_FPA1;
6800 I915_WRITE(dpll_reg, dpll);
6801 intel_wait_for_vblank(dev, pipe);
6802 dpll = I915_READ(dpll_reg);
6803 if (!(dpll & DISPLAY_RATE_SELECT_FPA1))
6804 DRM_DEBUG_DRIVER("failed to downclock LVDS!\n");
6805
6806 /* ...and lock them again */
6807 I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) & 0x3);
6808 }
6809
6810 }
6811
6812 /**
6813 * intel_idle_update - adjust clocks for idleness
6814 * @work: work struct
6815 *
6816 * Either the GPU or display (or both) went idle. Check the busy status
6817 * here and adjust the CRTC and GPU clocks as necessary.
6818 */
6819 static void intel_idle_update(struct work_struct *work)
6820 {
6821 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
6822 idle_work);
6823 struct drm_device *dev = dev_priv->dev;
6824 struct drm_crtc *crtc;
6825 struct intel_crtc *intel_crtc;
6826
6827 if (!i915_powersave)
6828 return;
6829
6830 mutex_lock(&dev->struct_mutex);
6831
6832 i915_update_gfx_val(dev_priv);
6833
6834 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
6835 /* Skip inactive CRTCs */
6836 if (!crtc->fb)
6837 continue;
6838
6839 intel_crtc = to_intel_crtc(crtc);
6840 if (!intel_crtc->busy)
6841 intel_decrease_pllclock(crtc);
6842 }
6843
6844
6845 mutex_unlock(&dev->struct_mutex);
6846 }
6847
6848 /**
6849 * intel_mark_busy - mark the GPU and possibly the display busy
6850 * @dev: drm device
6851 * @obj: object we're operating on
6852 *
6853 * Callers can use this function to indicate that the GPU is busy processing
6854 * commands. If @obj matches one of the CRTC objects (i.e. it's a scanout
6855 * buffer), we'll also mark the display as busy, so we know to increase its
6856 * clock frequency.
6857 */
6858 void intel_mark_busy(struct drm_device *dev, struct drm_i915_gem_object *obj)
6859 {
6860 drm_i915_private_t *dev_priv = dev->dev_private;
6861 struct drm_crtc *crtc = NULL;
6862 struct intel_framebuffer *intel_fb;
6863 struct intel_crtc *intel_crtc;
6864
6865 if (!drm_core_check_feature(dev, DRIVER_MODESET))
6866 return;
6867
6868 if (!dev_priv->busy)
6869 dev_priv->busy = true;
6870 else
6871 mod_timer(&dev_priv->idle_timer, jiffies +
6872 msecs_to_jiffies(GPU_IDLE_TIMEOUT));
6873
6874 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
6875 if (!crtc->fb)
6876 continue;
6877
6878 intel_crtc = to_intel_crtc(crtc);
6879 intel_fb = to_intel_framebuffer(crtc->fb);
6880 if (intel_fb->obj == obj) {
6881 if (!intel_crtc->busy) {
6882 /* Non-busy -> busy, upclock */
6883 intel_increase_pllclock(crtc);
6884 intel_crtc->busy = true;
6885 } else {
6886 /* Busy -> busy, put off timer */
6887 mod_timer(&intel_crtc->idle_timer, jiffies +
6888 msecs_to_jiffies(CRTC_IDLE_TIMEOUT));
6889 }
6890 }
6891 }
6892 }
6893
6894 static void intel_crtc_destroy(struct drm_crtc *crtc)
6895 {
6896 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6897 struct drm_device *dev = crtc->dev;
6898 struct intel_unpin_work *work;
6899 unsigned long flags;
6900
6901 spin_lock_irqsave(&dev->event_lock, flags);
6902 work = intel_crtc->unpin_work;
6903 intel_crtc->unpin_work = NULL;
6904 spin_unlock_irqrestore(&dev->event_lock, flags);
6905
6906 if (work) {
6907 cancel_work_sync(&work->work);
6908 kfree(work);
6909 }
6910
6911 drm_crtc_cleanup(crtc);
6912
6913 kfree(intel_crtc);
6914 }
6915
6916 static void intel_unpin_work_fn(struct work_struct *__work)
6917 {
6918 struct intel_unpin_work *work =
6919 container_of(__work, struct intel_unpin_work, work);
6920
6921 mutex_lock(&work->dev->struct_mutex);
6922 i915_gem_object_unpin(work->old_fb_obj);
6923 drm_gem_object_unreference(&work->pending_flip_obj->base);
6924 drm_gem_object_unreference(&work->old_fb_obj->base);
6925
6926 intel_update_fbc(work->dev);
6927 mutex_unlock(&work->dev->struct_mutex);
6928 kfree(work);
6929 }
6930
6931 static void do_intel_finish_page_flip(struct drm_device *dev,
6932 struct drm_crtc *crtc)
6933 {
6934 drm_i915_private_t *dev_priv = dev->dev_private;
6935 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6936 struct intel_unpin_work *work;
6937 struct drm_i915_gem_object *obj;
6938 struct drm_pending_vblank_event *e;
6939 struct timeval tnow, tvbl;
6940 unsigned long flags;
6941
6942 /* Ignore early vblank irqs */
6943 if (intel_crtc == NULL)
6944 return;
6945
6946 do_gettimeofday(&tnow);
6947
6948 spin_lock_irqsave(&dev->event_lock, flags);
6949 work = intel_crtc->unpin_work;
6950 if (work == NULL || !work->pending) {
6951 spin_unlock_irqrestore(&dev->event_lock, flags);
6952 return;
6953 }
6954
6955 intel_crtc->unpin_work = NULL;
6956
6957 if (work->event) {
6958 e = work->event;
6959 e->event.sequence = drm_vblank_count_and_time(dev, intel_crtc->pipe, &tvbl);
6960
6961 /* Called before vblank count and timestamps have
6962 * been updated for the vblank interval of flip
6963 * completion? Need to increment vblank count and
6964 * add one videorefresh duration to returned timestamp
6965 * to account for this. We assume this happened if we
6966 * get called over 0.9 frame durations after the last
6967 * timestamped vblank.
6968 *
6969 * This calculation can not be used with vrefresh rates
6970 * below 5Hz (10Hz to be on the safe side) without
6971 * promoting to 64 integers.
6972 */
6973 if (10 * (timeval_to_ns(&tnow) - timeval_to_ns(&tvbl)) >
6974 9 * crtc->framedur_ns) {
6975 e->event.sequence++;
6976 tvbl = ns_to_timeval(timeval_to_ns(&tvbl) +
6977 crtc->framedur_ns);
6978 }
6979
6980 e->event.tv_sec = tvbl.tv_sec;
6981 e->event.tv_usec = tvbl.tv_usec;
6982
6983 list_add_tail(&e->base.link,
6984 &e->base.file_priv->event_list);
6985 wake_up_interruptible(&e->base.file_priv->event_wait);
6986 }
6987
6988 drm_vblank_put(dev, intel_crtc->pipe);
6989
6990 spin_unlock_irqrestore(&dev->event_lock, flags);
6991
6992 obj = work->old_fb_obj;
6993
6994 atomic_clear_mask(1 << intel_crtc->plane,
6995 &obj->pending_flip.counter);
6996 if (atomic_read(&obj->pending_flip) == 0)
6997 wake_up(&dev_priv->pending_flip_queue);
6998
6999 schedule_work(&work->work);
7000
7001 trace_i915_flip_complete(intel_crtc->plane, work->pending_flip_obj);
7002 }
7003
7004 void intel_finish_page_flip(struct drm_device *dev, int pipe)
7005 {
7006 drm_i915_private_t *dev_priv = dev->dev_private;
7007 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
7008
7009 do_intel_finish_page_flip(dev, crtc);
7010 }
7011
7012 void intel_finish_page_flip_plane(struct drm_device *dev, int plane)
7013 {
7014 drm_i915_private_t *dev_priv = dev->dev_private;
7015 struct drm_crtc *crtc = dev_priv->plane_to_crtc_mapping[plane];
7016
7017 do_intel_finish_page_flip(dev, crtc);
7018 }
7019
7020 void intel_prepare_page_flip(struct drm_device *dev, int plane)
7021 {
7022 drm_i915_private_t *dev_priv = dev->dev_private;
7023 struct intel_crtc *intel_crtc =
7024 to_intel_crtc(dev_priv->plane_to_crtc_mapping[plane]);
7025 unsigned long flags;
7026
7027 spin_lock_irqsave(&dev->event_lock, flags);
7028 if (intel_crtc->unpin_work) {
7029 if ((++intel_crtc->unpin_work->pending) > 1)
7030 DRM_ERROR("Prepared flip multiple times\n");
7031 } else {
7032 DRM_DEBUG_DRIVER("preparing flip with no unpin work?\n");
7033 }
7034 spin_unlock_irqrestore(&dev->event_lock, flags);
7035 }
7036
7037 static int intel_gen2_queue_flip(struct drm_device *dev,
7038 struct drm_crtc *crtc,
7039 struct drm_framebuffer *fb,
7040 struct drm_i915_gem_object *obj)
7041 {
7042 struct drm_i915_private *dev_priv = dev->dev_private;
7043 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7044 unsigned long offset;
7045 u32 flip_mask;
7046 int ret;
7047
7048 ret = intel_pin_and_fence_fb_obj(dev, obj, LP_RING(dev_priv));
7049 if (ret)
7050 goto out;
7051
7052 /* Offset into the new buffer for cases of shared fbs between CRTCs */
7053 offset = crtc->y * fb->pitches[0] + crtc->x * fb->bits_per_pixel/8;
7054
7055 ret = BEGIN_LP_RING(6);
7056 if (ret)
7057 goto out;
7058
7059 /* Can't queue multiple flips, so wait for the previous
7060 * one to finish before executing the next.
7061 */
7062 if (intel_crtc->plane)
7063 flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
7064 else
7065 flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
7066 OUT_RING(MI_WAIT_FOR_EVENT | flip_mask);
7067 OUT_RING(MI_NOOP);
7068 OUT_RING(MI_DISPLAY_FLIP |
7069 MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7070 OUT_RING(fb->pitches[0]);
7071 OUT_RING(obj->gtt_offset + offset);
7072 OUT_RING(MI_NOOP);
7073 ADVANCE_LP_RING();
7074 out:
7075 return ret;
7076 }
7077
7078 static int intel_gen3_queue_flip(struct drm_device *dev,
7079 struct drm_crtc *crtc,
7080 struct drm_framebuffer *fb,
7081 struct drm_i915_gem_object *obj)
7082 {
7083 struct drm_i915_private *dev_priv = dev->dev_private;
7084 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7085 unsigned long offset;
7086 u32 flip_mask;
7087 int ret;
7088
7089 ret = intel_pin_and_fence_fb_obj(dev, obj, LP_RING(dev_priv));
7090 if (ret)
7091 goto out;
7092
7093 /* Offset into the new buffer for cases of shared fbs between CRTCs */
7094 offset = crtc->y * fb->pitches[0] + crtc->x * fb->bits_per_pixel/8;
7095
7096 ret = BEGIN_LP_RING(6);
7097 if (ret)
7098 goto out;
7099
7100 if (intel_crtc->plane)
7101 flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
7102 else
7103 flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
7104 OUT_RING(MI_WAIT_FOR_EVENT | flip_mask);
7105 OUT_RING(MI_NOOP);
7106 OUT_RING(MI_DISPLAY_FLIP_I915 |
7107 MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7108 OUT_RING(fb->pitches[0]);
7109 OUT_RING(obj->gtt_offset + offset);
7110 OUT_RING(MI_NOOP);
7111
7112 ADVANCE_LP_RING();
7113 out:
7114 return ret;
7115 }
7116
7117 static int intel_gen4_queue_flip(struct drm_device *dev,
7118 struct drm_crtc *crtc,
7119 struct drm_framebuffer *fb,
7120 struct drm_i915_gem_object *obj)
7121 {
7122 struct drm_i915_private *dev_priv = dev->dev_private;
7123 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7124 uint32_t pf, pipesrc;
7125 int ret;
7126
7127 ret = intel_pin_and_fence_fb_obj(dev, obj, LP_RING(dev_priv));
7128 if (ret)
7129 goto out;
7130
7131 ret = BEGIN_LP_RING(4);
7132 if (ret)
7133 goto out;
7134
7135 /* i965+ uses the linear or tiled offsets from the
7136 * Display Registers (which do not change across a page-flip)
7137 * so we need only reprogram the base address.
7138 */
7139 OUT_RING(MI_DISPLAY_FLIP |
7140 MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7141 OUT_RING(fb->pitches[0]);
7142 OUT_RING(obj->gtt_offset | obj->tiling_mode);
7143
7144 /* XXX Enabling the panel-fitter across page-flip is so far
7145 * untested on non-native modes, so ignore it for now.
7146 * pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
7147 */
7148 pf = 0;
7149 pipesrc = I915_READ(PIPESRC(intel_crtc->pipe)) & 0x0fff0fff;
7150 OUT_RING(pf | pipesrc);
7151 ADVANCE_LP_RING();
7152 out:
7153 return ret;
7154 }
7155
7156 static int intel_gen6_queue_flip(struct drm_device *dev,
7157 struct drm_crtc *crtc,
7158 struct drm_framebuffer *fb,
7159 struct drm_i915_gem_object *obj)
7160 {
7161 struct drm_i915_private *dev_priv = dev->dev_private;
7162 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7163 uint32_t pf, pipesrc;
7164 int ret;
7165
7166 ret = intel_pin_and_fence_fb_obj(dev, obj, LP_RING(dev_priv));
7167 if (ret)
7168 goto out;
7169
7170 ret = BEGIN_LP_RING(4);
7171 if (ret)
7172 goto out;
7173
7174 OUT_RING(MI_DISPLAY_FLIP |
7175 MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7176 OUT_RING(fb->pitches[0] | obj->tiling_mode);
7177 OUT_RING(obj->gtt_offset);
7178
7179 pf = I915_READ(PF_CTL(intel_crtc->pipe)) & PF_ENABLE;
7180 pipesrc = I915_READ(PIPESRC(intel_crtc->pipe)) & 0x0fff0fff;
7181 OUT_RING(pf | pipesrc);
7182 ADVANCE_LP_RING();
7183 out:
7184 return ret;
7185 }
7186
7187 /*
7188 * On gen7 we currently use the blit ring because (in early silicon at least)
7189 * the render ring doesn't give us interrpts for page flip completion, which
7190 * means clients will hang after the first flip is queued. Fortunately the
7191 * blit ring generates interrupts properly, so use it instead.
7192 */
7193 static int intel_gen7_queue_flip(struct drm_device *dev,
7194 struct drm_crtc *crtc,
7195 struct drm_framebuffer *fb,
7196 struct drm_i915_gem_object *obj)
7197 {
7198 struct drm_i915_private *dev_priv = dev->dev_private;
7199 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7200 struct intel_ring_buffer *ring = &dev_priv->ring[BCS];
7201 int ret;
7202
7203 ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7204 if (ret)
7205 goto out;
7206
7207 ret = intel_ring_begin(ring, 4);
7208 if (ret)
7209 goto out;
7210
7211 intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 | (intel_crtc->plane << 19));
7212 intel_ring_emit(ring, (fb->pitches[0] | obj->tiling_mode));
7213 intel_ring_emit(ring, (obj->gtt_offset));
7214 intel_ring_emit(ring, (MI_NOOP));
7215 intel_ring_advance(ring);
7216 out:
7217 return ret;
7218 }
7219
7220 static int intel_default_queue_flip(struct drm_device *dev,
7221 struct drm_crtc *crtc,
7222 struct drm_framebuffer *fb,
7223 struct drm_i915_gem_object *obj)
7224 {
7225 return -ENODEV;
7226 }
7227
7228 static int intel_crtc_page_flip(struct drm_crtc *crtc,
7229 struct drm_framebuffer *fb,
7230 struct drm_pending_vblank_event *event)
7231 {
7232 struct drm_device *dev = crtc->dev;
7233 struct drm_i915_private *dev_priv = dev->dev_private;
7234 struct intel_framebuffer *intel_fb;
7235 struct drm_i915_gem_object *obj;
7236 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7237 struct intel_unpin_work *work;
7238 unsigned long flags;
7239 int ret;
7240
7241 work = kzalloc(sizeof *work, GFP_KERNEL);
7242 if (work == NULL)
7243 return -ENOMEM;
7244
7245 work->event = event;
7246 work->dev = crtc->dev;
7247 intel_fb = to_intel_framebuffer(crtc->fb);
7248 work->old_fb_obj = intel_fb->obj;
7249 INIT_WORK(&work->work, intel_unpin_work_fn);
7250
7251 ret = drm_vblank_get(dev, intel_crtc->pipe);
7252 if (ret)
7253 goto free_work;
7254
7255 /* We borrow the event spin lock for protecting unpin_work */
7256 spin_lock_irqsave(&dev->event_lock, flags);
7257 if (intel_crtc->unpin_work) {
7258 spin_unlock_irqrestore(&dev->event_lock, flags);
7259 kfree(work);
7260 drm_vblank_put(dev, intel_crtc->pipe);
7261
7262 DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
7263 return -EBUSY;
7264 }
7265 intel_crtc->unpin_work = work;
7266 spin_unlock_irqrestore(&dev->event_lock, flags);
7267
7268 intel_fb = to_intel_framebuffer(fb);
7269 obj = intel_fb->obj;
7270
7271 mutex_lock(&dev->struct_mutex);
7272
7273 /* Reference the objects for the scheduled work. */
7274 drm_gem_object_reference(&work->old_fb_obj->base);
7275 drm_gem_object_reference(&obj->base);
7276
7277 crtc->fb = fb;
7278
7279 work->pending_flip_obj = obj;
7280
7281 work->enable_stall_check = true;
7282
7283 /* Block clients from rendering to the new back buffer until
7284 * the flip occurs and the object is no longer visible.
7285 */
7286 atomic_add(1 << intel_crtc->plane, &work->old_fb_obj->pending_flip);
7287
7288 ret = dev_priv->display.queue_flip(dev, crtc, fb, obj);
7289 if (ret)
7290 goto cleanup_pending;
7291
7292 intel_disable_fbc(dev);
7293 mutex_unlock(&dev->struct_mutex);
7294
7295 trace_i915_flip_request(intel_crtc->plane, obj);
7296
7297 return 0;
7298
7299 cleanup_pending:
7300 atomic_sub(1 << intel_crtc->plane, &work->old_fb_obj->pending_flip);
7301 drm_gem_object_unreference(&work->old_fb_obj->base);
7302 drm_gem_object_unreference(&obj->base);
7303 mutex_unlock(&dev->struct_mutex);
7304
7305 spin_lock_irqsave(&dev->event_lock, flags);
7306 intel_crtc->unpin_work = NULL;
7307 spin_unlock_irqrestore(&dev->event_lock, flags);
7308
7309 drm_vblank_put(dev, intel_crtc->pipe);
7310 free_work:
7311 kfree(work);
7312
7313 return ret;
7314 }
7315
7316 static void intel_sanitize_modesetting(struct drm_device *dev,
7317 int pipe, int plane)
7318 {
7319 struct drm_i915_private *dev_priv = dev->dev_private;
7320 u32 reg, val;
7321
7322 if (HAS_PCH_SPLIT(dev))
7323 return;
7324
7325 /* Who knows what state these registers were left in by the BIOS or
7326 * grub?
7327 *
7328 * If we leave the registers in a conflicting state (e.g. with the
7329 * display plane reading from the other pipe than the one we intend
7330 * to use) then when we attempt to teardown the active mode, we will
7331 * not disable the pipes and planes in the correct order -- leaving
7332 * a plane reading from a disabled pipe and possibly leading to
7333 * undefined behaviour.
7334 */
7335
7336 reg = DSPCNTR(plane);
7337 val = I915_READ(reg);
7338
7339 if ((val & DISPLAY_PLANE_ENABLE) == 0)
7340 return;
7341 if (!!(val & DISPPLANE_SEL_PIPE_MASK) == pipe)
7342 return;
7343
7344 /* This display plane is active and attached to the other CPU pipe. */
7345 pipe = !pipe;
7346
7347 /* Disable the plane and wait for it to stop reading from the pipe. */
7348 intel_disable_plane(dev_priv, plane, pipe);
7349 intel_disable_pipe(dev_priv, pipe);
7350 }
7351
7352 static void intel_crtc_reset(struct drm_crtc *crtc)
7353 {
7354 struct drm_device *dev = crtc->dev;
7355 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7356
7357 /* Reset flags back to the 'unknown' status so that they
7358 * will be correctly set on the initial modeset.
7359 */
7360 intel_crtc->dpms_mode = -1;
7361
7362 /* We need to fix up any BIOS configuration that conflicts with
7363 * our expectations.
7364 */
7365 intel_sanitize_modesetting(dev, intel_crtc->pipe, intel_crtc->plane);
7366 }
7367
7368 static struct drm_crtc_helper_funcs intel_helper_funcs = {
7369 .dpms = intel_crtc_dpms,
7370 .mode_fixup = intel_crtc_mode_fixup,
7371 .mode_set = intel_crtc_mode_set,
7372 .mode_set_base = intel_pipe_set_base,
7373 .mode_set_base_atomic = intel_pipe_set_base_atomic,
7374 .load_lut = intel_crtc_load_lut,
7375 .disable = intel_crtc_disable,
7376 };
7377
7378 static const struct drm_crtc_funcs intel_crtc_funcs = {
7379 .reset = intel_crtc_reset,
7380 .cursor_set = intel_crtc_cursor_set,
7381 .cursor_move = intel_crtc_cursor_move,
7382 .gamma_set = intel_crtc_gamma_set,
7383 .set_config = drm_crtc_helper_set_config,
7384 .destroy = intel_crtc_destroy,
7385 .page_flip = intel_crtc_page_flip,
7386 };
7387
7388 static void intel_crtc_init(struct drm_device *dev, int pipe)
7389 {
7390 drm_i915_private_t *dev_priv = dev->dev_private;
7391 struct intel_crtc *intel_crtc;
7392 int i;
7393
7394 intel_crtc = kzalloc(sizeof(struct intel_crtc) + (INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
7395 if (intel_crtc == NULL)
7396 return;
7397
7398 drm_crtc_init(dev, &intel_crtc->base, &intel_crtc_funcs);
7399
7400 drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256);
7401 for (i = 0; i < 256; i++) {
7402 intel_crtc->lut_r[i] = i;
7403 intel_crtc->lut_g[i] = i;
7404 intel_crtc->lut_b[i] = i;
7405 }
7406
7407 /* Swap pipes & planes for FBC on pre-965 */
7408 intel_crtc->pipe = pipe;
7409 intel_crtc->plane = pipe;
7410 if (IS_MOBILE(dev) && IS_GEN3(dev)) {
7411 DRM_DEBUG_KMS("swapping pipes & planes for FBC\n");
7412 intel_crtc->plane = !pipe;
7413 }
7414
7415 BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
7416 dev_priv->plane_to_crtc_mapping[intel_crtc->plane] != NULL);
7417 dev_priv->plane_to_crtc_mapping[intel_crtc->plane] = &intel_crtc->base;
7418 dev_priv->pipe_to_crtc_mapping[intel_crtc->pipe] = &intel_crtc->base;
7419
7420 intel_crtc_reset(&intel_crtc->base);
7421 intel_crtc->active = true; /* force the pipe off on setup_init_config */
7422 intel_crtc->bpp = 24; /* default for pre-Ironlake */
7423
7424 if (HAS_PCH_SPLIT(dev)) {
7425 if (pipe == 2 && IS_IVYBRIDGE(dev))
7426 intel_crtc->no_pll = true;
7427 intel_helper_funcs.prepare = ironlake_crtc_prepare;
7428 intel_helper_funcs.commit = ironlake_crtc_commit;
7429 } else {
7430 intel_helper_funcs.prepare = i9xx_crtc_prepare;
7431 intel_helper_funcs.commit = i9xx_crtc_commit;
7432 }
7433
7434 drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
7435
7436 intel_crtc->busy = false;
7437
7438 setup_timer(&intel_crtc->idle_timer, intel_crtc_idle_timer,
7439 (unsigned long)intel_crtc);
7440 }
7441
7442 int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
7443 struct drm_file *file)
7444 {
7445 drm_i915_private_t *dev_priv = dev->dev_private;
7446 struct drm_i915_get_pipe_from_crtc_id *pipe_from_crtc_id = data;
7447 struct drm_mode_object *drmmode_obj;
7448 struct intel_crtc *crtc;
7449
7450 if (!dev_priv) {
7451 DRM_ERROR("called with no initialization\n");
7452 return -EINVAL;
7453 }
7454
7455 drmmode_obj = drm_mode_object_find(dev, pipe_from_crtc_id->crtc_id,
7456 DRM_MODE_OBJECT_CRTC);
7457
7458 if (!drmmode_obj) {
7459 DRM_ERROR("no such CRTC id\n");
7460 return -EINVAL;
7461 }
7462
7463 crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
7464 pipe_from_crtc_id->pipe = crtc->pipe;
7465
7466 return 0;
7467 }
7468
7469 static int intel_encoder_clones(struct drm_device *dev, int type_mask)
7470 {
7471 struct intel_encoder *encoder;
7472 int index_mask = 0;
7473 int entry = 0;
7474
7475 list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
7476 if (type_mask & encoder->clone_mask)
7477 index_mask |= (1 << entry);
7478 entry++;
7479 }
7480
7481 return index_mask;
7482 }
7483
7484 static bool has_edp_a(struct drm_device *dev)
7485 {
7486 struct drm_i915_private *dev_priv = dev->dev_private;
7487
7488 if (!IS_MOBILE(dev))
7489 return false;
7490
7491 if ((I915_READ(DP_A) & DP_DETECTED) == 0)
7492 return false;
7493
7494 if (IS_GEN5(dev) &&
7495 (I915_READ(ILK_DISPLAY_CHICKEN_FUSES) & ILK_eDP_A_DISABLE))
7496 return false;
7497
7498 return true;
7499 }
7500
7501 static void intel_setup_outputs(struct drm_device *dev)
7502 {
7503 struct drm_i915_private *dev_priv = dev->dev_private;
7504 struct intel_encoder *encoder;
7505 bool dpd_is_edp = false;
7506 bool has_lvds = false;
7507
7508 if (IS_MOBILE(dev) && !IS_I830(dev))
7509 has_lvds = intel_lvds_init(dev);
7510 if (!has_lvds && !HAS_PCH_SPLIT(dev)) {
7511 /* disable the panel fitter on everything but LVDS */
7512 I915_WRITE(PFIT_CONTROL, 0);
7513 }
7514
7515 if (HAS_PCH_SPLIT(dev)) {
7516 dpd_is_edp = intel_dpd_is_edp(dev);
7517
7518 if (has_edp_a(dev))
7519 intel_dp_init(dev, DP_A);
7520
7521 if (dpd_is_edp && (I915_READ(PCH_DP_D) & DP_DETECTED))
7522 intel_dp_init(dev, PCH_DP_D);
7523 }
7524
7525 intel_crt_init(dev);
7526
7527 if (HAS_PCH_SPLIT(dev)) {
7528 int found;
7529
7530 if (I915_READ(HDMIB) & PORT_DETECTED) {
7531 /* PCH SDVOB multiplex with HDMIB */
7532 found = intel_sdvo_init(dev, PCH_SDVOB);
7533 if (!found)
7534 intel_hdmi_init(dev, HDMIB);
7535 if (!found && (I915_READ(PCH_DP_B) & DP_DETECTED))
7536 intel_dp_init(dev, PCH_DP_B);
7537 }
7538
7539 if (I915_READ(HDMIC) & PORT_DETECTED)
7540 intel_hdmi_init(dev, HDMIC);
7541
7542 if (I915_READ(HDMID) & PORT_DETECTED)
7543 intel_hdmi_init(dev, HDMID);
7544
7545 if (I915_READ(PCH_DP_C) & DP_DETECTED)
7546 intel_dp_init(dev, PCH_DP_C);
7547
7548 if (!dpd_is_edp && (I915_READ(PCH_DP_D) & DP_DETECTED))
7549 intel_dp_init(dev, PCH_DP_D);
7550
7551 } else if (SUPPORTS_DIGITAL_OUTPUTS(dev)) {
7552 bool found = false;
7553
7554 if (I915_READ(SDVOB) & SDVO_DETECTED) {
7555 DRM_DEBUG_KMS("probing SDVOB\n");
7556 found = intel_sdvo_init(dev, SDVOB);
7557 if (!found && SUPPORTS_INTEGRATED_HDMI(dev)) {
7558 DRM_DEBUG_KMS("probing HDMI on SDVOB\n");
7559 intel_hdmi_init(dev, SDVOB);
7560 }
7561
7562 if (!found && SUPPORTS_INTEGRATED_DP(dev)) {
7563 DRM_DEBUG_KMS("probing DP_B\n");
7564 intel_dp_init(dev, DP_B);
7565 }
7566 }
7567
7568 /* Before G4X SDVOC doesn't have its own detect register */
7569
7570 if (I915_READ(SDVOB) & SDVO_DETECTED) {
7571 DRM_DEBUG_KMS("probing SDVOC\n");
7572 found = intel_sdvo_init(dev, SDVOC);
7573 }
7574
7575 if (!found && (I915_READ(SDVOC) & SDVO_DETECTED)) {
7576
7577 if (SUPPORTS_INTEGRATED_HDMI(dev)) {
7578 DRM_DEBUG_KMS("probing HDMI on SDVOC\n");
7579 intel_hdmi_init(dev, SDVOC);
7580 }
7581 if (SUPPORTS_INTEGRATED_DP(dev)) {
7582 DRM_DEBUG_KMS("probing DP_C\n");
7583 intel_dp_init(dev, DP_C);
7584 }
7585 }
7586
7587 if (SUPPORTS_INTEGRATED_DP(dev) &&
7588 (I915_READ(DP_D) & DP_DETECTED)) {
7589 DRM_DEBUG_KMS("probing DP_D\n");
7590 intel_dp_init(dev, DP_D);
7591 }
7592 } else if (IS_GEN2(dev))
7593 intel_dvo_init(dev);
7594
7595 if (SUPPORTS_TV(dev))
7596 intel_tv_init(dev);
7597
7598 list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
7599 encoder->base.possible_crtcs = encoder->crtc_mask;
7600 encoder->base.possible_clones =
7601 intel_encoder_clones(dev, encoder->clone_mask);
7602 }
7603
7604 /* disable all the possible outputs/crtcs before entering KMS mode */
7605 drm_helper_disable_unused_functions(dev);
7606
7607 if (HAS_PCH_SPLIT(dev))
7608 ironlake_init_pch_refclk(dev);
7609 }
7610
7611 static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
7612 {
7613 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
7614
7615 drm_framebuffer_cleanup(fb);
7616 drm_gem_object_unreference_unlocked(&intel_fb->obj->base);
7617
7618 kfree(intel_fb);
7619 }
7620
7621 static int intel_user_framebuffer_create_handle(struct drm_framebuffer *fb,
7622 struct drm_file *file,
7623 unsigned int *handle)
7624 {
7625 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
7626 struct drm_i915_gem_object *obj = intel_fb->obj;
7627
7628 return drm_gem_handle_create(file, &obj->base, handle);
7629 }
7630
7631 static const struct drm_framebuffer_funcs intel_fb_funcs = {
7632 .destroy = intel_user_framebuffer_destroy,
7633 .create_handle = intel_user_framebuffer_create_handle,
7634 };
7635
7636 int intel_framebuffer_init(struct drm_device *dev,
7637 struct intel_framebuffer *intel_fb,
7638 struct drm_mode_fb_cmd2 *mode_cmd,
7639 struct drm_i915_gem_object *obj)
7640 {
7641 int ret;
7642
7643 if (obj->tiling_mode == I915_TILING_Y)
7644 return -EINVAL;
7645
7646 if (mode_cmd->pitches[0] & 63)
7647 return -EINVAL;
7648
7649 switch (mode_cmd->pixel_format) {
7650 case DRM_FORMAT_RGB332:
7651 case DRM_FORMAT_RGB565:
7652 case DRM_FORMAT_XRGB8888:
7653 case DRM_FORMAT_ARGB8888:
7654 case DRM_FORMAT_XRGB2101010:
7655 case DRM_FORMAT_ARGB2101010:
7656 /* RGB formats are common across chipsets */
7657 break;
7658 case DRM_FORMAT_YUYV:
7659 case DRM_FORMAT_UYVY:
7660 case DRM_FORMAT_YVYU:
7661 case DRM_FORMAT_VYUY:
7662 break;
7663 default:
7664 DRM_ERROR("unsupported pixel format\n");
7665 return -EINVAL;
7666 }
7667
7668 ret = drm_framebuffer_init(dev, &intel_fb->base, &intel_fb_funcs);
7669 if (ret) {
7670 DRM_ERROR("framebuffer init failed %d\n", ret);
7671 return ret;
7672 }
7673
7674 drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
7675 intel_fb->obj = obj;
7676 return 0;
7677 }
7678
7679 static struct drm_framebuffer *
7680 intel_user_framebuffer_create(struct drm_device *dev,
7681 struct drm_file *filp,
7682 struct drm_mode_fb_cmd2 *mode_cmd)
7683 {
7684 struct drm_i915_gem_object *obj;
7685
7686 obj = to_intel_bo(drm_gem_object_lookup(dev, filp,
7687 mode_cmd->handles[0]));
7688 if (&obj->base == NULL)
7689 return ERR_PTR(-ENOENT);
7690
7691 return intel_framebuffer_create(dev, mode_cmd, obj);
7692 }
7693
7694 static const struct drm_mode_config_funcs intel_mode_funcs = {
7695 .fb_create = intel_user_framebuffer_create,
7696 .output_poll_changed = intel_fb_output_poll_changed,
7697 };
7698
7699 static struct drm_i915_gem_object *
7700 intel_alloc_context_page(struct drm_device *dev)
7701 {
7702 struct drm_i915_gem_object *ctx;
7703 int ret;
7704
7705 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
7706
7707 ctx = i915_gem_alloc_object(dev, 4096);
7708 if (!ctx) {
7709 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
7710 return NULL;
7711 }
7712
7713 ret = i915_gem_object_pin(ctx, 4096, true);
7714 if (ret) {
7715 DRM_ERROR("failed to pin power context: %d\n", ret);
7716 goto err_unref;
7717 }
7718
7719 ret = i915_gem_object_set_to_gtt_domain(ctx, 1);
7720 if (ret) {
7721 DRM_ERROR("failed to set-domain on power context: %d\n", ret);
7722 goto err_unpin;
7723 }
7724
7725 return ctx;
7726
7727 err_unpin:
7728 i915_gem_object_unpin(ctx);
7729 err_unref:
7730 drm_gem_object_unreference(&ctx->base);
7731 mutex_unlock(&dev->struct_mutex);
7732 return NULL;
7733 }
7734
7735 bool ironlake_set_drps(struct drm_device *dev, u8 val)
7736 {
7737 struct drm_i915_private *dev_priv = dev->dev_private;
7738 u16 rgvswctl;
7739
7740 rgvswctl = I915_READ16(MEMSWCTL);
7741 if (rgvswctl & MEMCTL_CMD_STS) {
7742 DRM_DEBUG("gpu busy, RCS change rejected\n");
7743 return false; /* still busy with another command */
7744 }
7745
7746 rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
7747 (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
7748 I915_WRITE16(MEMSWCTL, rgvswctl);
7749 POSTING_READ16(MEMSWCTL);
7750
7751 rgvswctl |= MEMCTL_CMD_STS;
7752 I915_WRITE16(MEMSWCTL, rgvswctl);
7753
7754 return true;
7755 }
7756
7757 void ironlake_enable_drps(struct drm_device *dev)
7758 {
7759 struct drm_i915_private *dev_priv = dev->dev_private;
7760 u32 rgvmodectl = I915_READ(MEMMODECTL);
7761 u8 fmax, fmin, fstart, vstart;
7762
7763 /* Enable temp reporting */
7764 I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
7765 I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);
7766
7767 /* 100ms RC evaluation intervals */
7768 I915_WRITE(RCUPEI, 100000);
7769 I915_WRITE(RCDNEI, 100000);
7770
7771 /* Set max/min thresholds to 90ms and 80ms respectively */
7772 I915_WRITE(RCBMAXAVG, 90000);
7773 I915_WRITE(RCBMINAVG, 80000);
7774
7775 I915_WRITE(MEMIHYST, 1);
7776
7777 /* Set up min, max, and cur for interrupt handling */
7778 fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
7779 fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
7780 fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
7781 MEMMODE_FSTART_SHIFT;
7782
7783 vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >>
7784 PXVFREQ_PX_SHIFT;
7785
7786 dev_priv->fmax = fmax; /* IPS callback will increase this */
7787 dev_priv->fstart = fstart;
7788
7789 dev_priv->max_delay = fstart;
7790 dev_priv->min_delay = fmin;
7791 dev_priv->cur_delay = fstart;
7792
7793 DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
7794 fmax, fmin, fstart);
7795
7796 I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
7797
7798 /*
7799 * Interrupts will be enabled in ironlake_irq_postinstall
7800 */
7801
7802 I915_WRITE(VIDSTART, vstart);
7803 POSTING_READ(VIDSTART);
7804
7805 rgvmodectl |= MEMMODE_SWMODE_EN;
7806 I915_WRITE(MEMMODECTL, rgvmodectl);
7807
7808 if (wait_for((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
7809 DRM_ERROR("stuck trying to change perf mode\n");
7810 msleep(1);
7811
7812 ironlake_set_drps(dev, fstart);
7813
7814 dev_priv->last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) +
7815 I915_READ(0x112e0);
7816 dev_priv->last_time1 = jiffies_to_msecs(jiffies);
7817 dev_priv->last_count2 = I915_READ(0x112f4);
7818 getrawmonotonic(&dev_priv->last_time2);
7819 }
7820
7821 void ironlake_disable_drps(struct drm_device *dev)
7822 {
7823 struct drm_i915_private *dev_priv = dev->dev_private;
7824 u16 rgvswctl = I915_READ16(MEMSWCTL);
7825
7826 /* Ack interrupts, disable EFC interrupt */
7827 I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
7828 I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
7829 I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
7830 I915_WRITE(DEIIR, DE_PCU_EVENT);
7831 I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);
7832
7833 /* Go back to the starting frequency */
7834 ironlake_set_drps(dev, dev_priv->fstart);
7835 msleep(1);
7836 rgvswctl |= MEMCTL_CMD_STS;
7837 I915_WRITE(MEMSWCTL, rgvswctl);
7838 msleep(1);
7839
7840 }
7841
7842 void gen6_set_rps(struct drm_device *dev, u8 val)
7843 {
7844 struct drm_i915_private *dev_priv = dev->dev_private;
7845 u32 swreq;
7846
7847 swreq = (val & 0x3ff) << 25;
7848 I915_WRITE(GEN6_RPNSWREQ, swreq);
7849 }
7850
7851 void gen6_disable_rps(struct drm_device *dev)
7852 {
7853 struct drm_i915_private *dev_priv = dev->dev_private;
7854
7855 I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
7856 I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
7857 I915_WRITE(GEN6_PMIER, 0);
7858 /* Complete PM interrupt masking here doesn't race with the rps work
7859 * item again unmasking PM interrupts because that is using a different
7860 * register (PMIMR) to mask PM interrupts. The only risk is in leaving
7861 * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */
7862
7863 spin_lock_irq(&dev_priv->rps_lock);
7864 dev_priv->pm_iir = 0;
7865 spin_unlock_irq(&dev_priv->rps_lock);
7866
7867 I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
7868 }
7869
7870 static unsigned long intel_pxfreq(u32 vidfreq)
7871 {
7872 unsigned long freq;
7873 int div = (vidfreq & 0x3f0000) >> 16;
7874 int post = (vidfreq & 0x3000) >> 12;
7875 int pre = (vidfreq & 0x7);
7876
7877 if (!pre)
7878 return 0;
7879
7880 freq = ((div * 133333) / ((1<<post) * pre));
7881
7882 return freq;
7883 }
7884
7885 void intel_init_emon(struct drm_device *dev)
7886 {
7887 struct drm_i915_private *dev_priv = dev->dev_private;
7888 u32 lcfuse;
7889 u8 pxw[16];
7890 int i;
7891
7892 /* Disable to program */
7893 I915_WRITE(ECR, 0);
7894 POSTING_READ(ECR);
7895
7896 /* Program energy weights for various events */
7897 I915_WRITE(SDEW, 0x15040d00);
7898 I915_WRITE(CSIEW0, 0x007f0000);
7899 I915_WRITE(CSIEW1, 0x1e220004);
7900 I915_WRITE(CSIEW2, 0x04000004);
7901
7902 for (i = 0; i < 5; i++)
7903 I915_WRITE(PEW + (i * 4), 0);
7904 for (i = 0; i < 3; i++)
7905 I915_WRITE(DEW + (i * 4), 0);
7906
7907 /* Program P-state weights to account for frequency power adjustment */
7908 for (i = 0; i < 16; i++) {
7909 u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4));
7910 unsigned long freq = intel_pxfreq(pxvidfreq);
7911 unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
7912 PXVFREQ_PX_SHIFT;
7913 unsigned long val;
7914
7915 val = vid * vid;
7916 val *= (freq / 1000);
7917 val *= 255;
7918 val /= (127*127*900);
7919 if (val > 0xff)
7920 DRM_ERROR("bad pxval: %ld\n", val);
7921 pxw[i] = val;
7922 }
7923 /* Render standby states get 0 weight */
7924 pxw[14] = 0;
7925 pxw[15] = 0;
7926
7927 for (i = 0; i < 4; i++) {
7928 u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
7929 (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
7930 I915_WRITE(PXW + (i * 4), val);
7931 }
7932
7933 /* Adjust magic regs to magic values (more experimental results) */
7934 I915_WRITE(OGW0, 0);
7935 I915_WRITE(OGW1, 0);
7936 I915_WRITE(EG0, 0x00007f00);
7937 I915_WRITE(EG1, 0x0000000e);
7938 I915_WRITE(EG2, 0x000e0000);
7939 I915_WRITE(EG3, 0x68000300);
7940 I915_WRITE(EG4, 0x42000000);
7941 I915_WRITE(EG5, 0x00140031);
7942 I915_WRITE(EG6, 0);
7943 I915_WRITE(EG7, 0);
7944
7945 for (i = 0; i < 8; i++)
7946 I915_WRITE(PXWL + (i * 4), 0);
7947
7948 /* Enable PMON + select events */
7949 I915_WRITE(ECR, 0x80000019);
7950
7951 lcfuse = I915_READ(LCFUSE02);
7952
7953 dev_priv->corr = (lcfuse & LCFUSE_HIV_MASK);
7954 }
7955
7956 static bool intel_enable_rc6(struct drm_device *dev)
7957 {
7958 /*
7959 * Respect the kernel parameter if it is set
7960 */
7961 if (i915_enable_rc6 >= 0)
7962 return i915_enable_rc6;
7963
7964 /*
7965 * Disable RC6 on Ironlake
7966 */
7967 if (INTEL_INFO(dev)->gen == 5)
7968 return 0;
7969
7970 /*
7971 * Enable rc6 on Sandybridge if DMA remapping is disabled
7972 */
7973 if (INTEL_INFO(dev)->gen == 6) {
7974 DRM_DEBUG_DRIVER("Sandybridge: intel_iommu_enabled %s -- RC6 %sabled\n",
7975 intel_iommu_enabled ? "true" : "false",
7976 !intel_iommu_enabled ? "en" : "dis");
7977 return !intel_iommu_enabled;
7978 }
7979 DRM_DEBUG_DRIVER("RC6 enabled\n");
7980 return 1;
7981 }
7982
7983 void gen6_enable_rps(struct drm_i915_private *dev_priv)
7984 {
7985 u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
7986 u32 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
7987 u32 pcu_mbox, rc6_mask = 0;
7988 int cur_freq, min_freq, max_freq;
7989 int i;
7990
7991 /* Here begins a magic sequence of register writes to enable
7992 * auto-downclocking.
7993 *
7994 * Perhaps there might be some value in exposing these to
7995 * userspace...
7996 */
7997 I915_WRITE(GEN6_RC_STATE, 0);
7998 mutex_lock(&dev_priv->dev->struct_mutex);
7999 gen6_gt_force_wake_get(dev_priv);
8000
8001 /* disable the counters and set deterministic thresholds */
8002 I915_WRITE(GEN6_RC_CONTROL, 0);
8003
8004 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16);
8005 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30);
8006 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30);
8007 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
8008 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
8009
8010 for (i = 0; i < I915_NUM_RINGS; i++)
8011 I915_WRITE(RING_MAX_IDLE(dev_priv->ring[i].mmio_base), 10);
8012
8013 I915_WRITE(GEN6_RC_SLEEP, 0);
8014 I915_WRITE(GEN6_RC1e_THRESHOLD, 1000);
8015 I915_WRITE(GEN6_RC6_THRESHOLD, 50000);
8016 I915_WRITE(GEN6_RC6p_THRESHOLD, 100000);
8017 I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
8018
8019 if (intel_enable_rc6(dev_priv->dev))
8020 rc6_mask = GEN6_RC_CTL_RC6p_ENABLE |
8021 GEN6_RC_CTL_RC6_ENABLE;
8022
8023 I915_WRITE(GEN6_RC_CONTROL,
8024 rc6_mask |
8025 GEN6_RC_CTL_EI_MODE(1) |
8026 GEN6_RC_CTL_HW_ENABLE);
8027
8028 I915_WRITE(GEN6_RPNSWREQ,
8029 GEN6_FREQUENCY(10) |
8030 GEN6_OFFSET(0) |
8031 GEN6_AGGRESSIVE_TURBO);
8032 I915_WRITE(GEN6_RC_VIDEO_FREQ,
8033 GEN6_FREQUENCY(12));
8034
8035 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000);
8036 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
8037 18 << 24 |
8038 6 << 16);
8039 I915_WRITE(GEN6_RP_UP_THRESHOLD, 10000);
8040 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 1000000);
8041 I915_WRITE(GEN6_RP_UP_EI, 100000);
8042 I915_WRITE(GEN6_RP_DOWN_EI, 5000000);
8043 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
8044 I915_WRITE(GEN6_RP_CONTROL,
8045 GEN6_RP_MEDIA_TURBO |
8046 GEN6_RP_USE_NORMAL_FREQ |
8047 GEN6_RP_MEDIA_IS_GFX |
8048 GEN6_RP_ENABLE |
8049 GEN6_RP_UP_BUSY_AVG |
8050 GEN6_RP_DOWN_IDLE_CONT);
8051
8052 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
8053 500))
8054 DRM_ERROR("timeout waiting for pcode mailbox to become idle\n");
8055
8056 I915_WRITE(GEN6_PCODE_DATA, 0);
8057 I915_WRITE(GEN6_PCODE_MAILBOX,
8058 GEN6_PCODE_READY |
8059 GEN6_PCODE_WRITE_MIN_FREQ_TABLE);
8060 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
8061 500))
8062 DRM_ERROR("timeout waiting for pcode mailbox to finish\n");
8063
8064 min_freq = (rp_state_cap & 0xff0000) >> 16;
8065 max_freq = rp_state_cap & 0xff;
8066 cur_freq = (gt_perf_status & 0xff00) >> 8;
8067
8068 /* Check for overclock support */
8069 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
8070 500))
8071 DRM_ERROR("timeout waiting for pcode mailbox to become idle\n");
8072 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_READ_OC_PARAMS);
8073 pcu_mbox = I915_READ(GEN6_PCODE_DATA);
8074 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
8075 500))
8076 DRM_ERROR("timeout waiting for pcode mailbox to finish\n");
8077 if (pcu_mbox & (1<<31)) { /* OC supported */
8078 max_freq = pcu_mbox & 0xff;
8079 DRM_DEBUG_DRIVER("overclocking supported, adjusting frequency max to %dMHz\n", pcu_mbox * 50);
8080 }
8081
8082 /* In units of 100MHz */
8083 dev_priv->max_delay = max_freq;
8084 dev_priv->min_delay = min_freq;
8085 dev_priv->cur_delay = cur_freq;
8086
8087 /* requires MSI enabled */
8088 I915_WRITE(GEN6_PMIER,
8089 GEN6_PM_MBOX_EVENT |
8090 GEN6_PM_THERMAL_EVENT |
8091 GEN6_PM_RP_DOWN_TIMEOUT |
8092 GEN6_PM_RP_UP_THRESHOLD |
8093 GEN6_PM_RP_DOWN_THRESHOLD |
8094 GEN6_PM_RP_UP_EI_EXPIRED |
8095 GEN6_PM_RP_DOWN_EI_EXPIRED);
8096 spin_lock_irq(&dev_priv->rps_lock);
8097 WARN_ON(dev_priv->pm_iir != 0);
8098 I915_WRITE(GEN6_PMIMR, 0);
8099 spin_unlock_irq(&dev_priv->rps_lock);
8100 /* enable all PM interrupts */
8101 I915_WRITE(GEN6_PMINTRMSK, 0);
8102
8103 gen6_gt_force_wake_put(dev_priv);
8104 mutex_unlock(&dev_priv->dev->struct_mutex);
8105 }
8106
8107 void gen6_update_ring_freq(struct drm_i915_private *dev_priv)
8108 {
8109 int min_freq = 15;
8110 int gpu_freq, ia_freq, max_ia_freq;
8111 int scaling_factor = 180;
8112
8113 max_ia_freq = cpufreq_quick_get_max(0);
8114 /*
8115 * Default to measured freq if none found, PCU will ensure we don't go
8116 * over
8117 */
8118 if (!max_ia_freq)
8119 max_ia_freq = tsc_khz;
8120
8121 /* Convert from kHz to MHz */
8122 max_ia_freq /= 1000;
8123
8124 mutex_lock(&dev_priv->dev->struct_mutex);
8125
8126 /*
8127 * For each potential GPU frequency, load a ring frequency we'd like
8128 * to use for memory access. We do this by specifying the IA frequency
8129 * the PCU should use as a reference to determine the ring frequency.
8130 */
8131 for (gpu_freq = dev_priv->max_delay; gpu_freq >= dev_priv->min_delay;
8132 gpu_freq--) {
8133 int diff = dev_priv->max_delay - gpu_freq;
8134
8135 /*
8136 * For GPU frequencies less than 750MHz, just use the lowest
8137 * ring freq.
8138 */
8139 if (gpu_freq < min_freq)
8140 ia_freq = 800;
8141 else
8142 ia_freq = max_ia_freq - ((diff * scaling_factor) / 2);
8143 ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100);
8144
8145 I915_WRITE(GEN6_PCODE_DATA,
8146 (ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT) |
8147 gpu_freq);
8148 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY |
8149 GEN6_PCODE_WRITE_MIN_FREQ_TABLE);
8150 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) &
8151 GEN6_PCODE_READY) == 0, 10)) {
8152 DRM_ERROR("pcode write of freq table timed out\n");
8153 continue;
8154 }
8155 }
8156
8157 mutex_unlock(&dev_priv->dev->struct_mutex);
8158 }
8159
8160 static void ironlake_init_clock_gating(struct drm_device *dev)
8161 {
8162 struct drm_i915_private *dev_priv = dev->dev_private;
8163 uint32_t dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE;
8164
8165 /* Required for FBC */
8166 dspclk_gate |= DPFCUNIT_CLOCK_GATE_DISABLE |
8167 DPFCRUNIT_CLOCK_GATE_DISABLE |
8168 DPFDUNIT_CLOCK_GATE_DISABLE;
8169 /* Required for CxSR */
8170 dspclk_gate |= DPARBUNIT_CLOCK_GATE_DISABLE;
8171
8172 I915_WRITE(PCH_3DCGDIS0,
8173 MARIUNIT_CLOCK_GATE_DISABLE |
8174 SVSMUNIT_CLOCK_GATE_DISABLE);
8175 I915_WRITE(PCH_3DCGDIS1,
8176 VFMUNIT_CLOCK_GATE_DISABLE);
8177
8178 I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate);
8179
8180 /*
8181 * According to the spec the following bits should be set in
8182 * order to enable memory self-refresh
8183 * The bit 22/21 of 0x42004
8184 * The bit 5 of 0x42020
8185 * The bit 15 of 0x45000
8186 */
8187 I915_WRITE(ILK_DISPLAY_CHICKEN2,
8188 (I915_READ(ILK_DISPLAY_CHICKEN2) |
8189 ILK_DPARB_GATE | ILK_VSDPFD_FULL));
8190 I915_WRITE(ILK_DSPCLK_GATE,
8191 (I915_READ(ILK_DSPCLK_GATE) |
8192 ILK_DPARB_CLK_GATE));
8193 I915_WRITE(DISP_ARB_CTL,
8194 (I915_READ(DISP_ARB_CTL) |
8195 DISP_FBC_WM_DIS));
8196 I915_WRITE(WM3_LP_ILK, 0);
8197 I915_WRITE(WM2_LP_ILK, 0);
8198 I915_WRITE(WM1_LP_ILK, 0);
8199
8200 /*
8201 * Based on the document from hardware guys the following bits
8202 * should be set unconditionally in order to enable FBC.
8203 * The bit 22 of 0x42000
8204 * The bit 22 of 0x42004
8205 * The bit 7,8,9 of 0x42020.
8206 */
8207 if (IS_IRONLAKE_M(dev)) {
8208 I915_WRITE(ILK_DISPLAY_CHICKEN1,
8209 I915_READ(ILK_DISPLAY_CHICKEN1) |
8210 ILK_FBCQ_DIS);
8211 I915_WRITE(ILK_DISPLAY_CHICKEN2,
8212 I915_READ(ILK_DISPLAY_CHICKEN2) |
8213 ILK_DPARB_GATE);
8214 I915_WRITE(ILK_DSPCLK_GATE,
8215 I915_READ(ILK_DSPCLK_GATE) |
8216 ILK_DPFC_DIS1 |
8217 ILK_DPFC_DIS2 |
8218 ILK_CLK_FBC);
8219 }
8220
8221 I915_WRITE(ILK_DISPLAY_CHICKEN2,
8222 I915_READ(ILK_DISPLAY_CHICKEN2) |
8223 ILK_ELPIN_409_SELECT);
8224 I915_WRITE(_3D_CHICKEN2,
8225 _3D_CHICKEN2_WM_READ_PIPELINED << 16 |
8226 _3D_CHICKEN2_WM_READ_PIPELINED);
8227 }
8228
8229 static void gen6_init_clock_gating(struct drm_device *dev)
8230 {
8231 struct drm_i915_private *dev_priv = dev->dev_private;
8232 int pipe;
8233 uint32_t dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE;
8234
8235 I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate);
8236
8237 I915_WRITE(ILK_DISPLAY_CHICKEN2,
8238 I915_READ(ILK_DISPLAY_CHICKEN2) |
8239 ILK_ELPIN_409_SELECT);
8240
8241 I915_WRITE(WM3_LP_ILK, 0);
8242 I915_WRITE(WM2_LP_ILK, 0);
8243 I915_WRITE(WM1_LP_ILK, 0);
8244
8245 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
8246 * gating disable must be set. Failure to set it results in
8247 * flickering pixels due to Z write ordering failures after
8248 * some amount of runtime in the Mesa "fire" demo, and Unigine
8249 * Sanctuary and Tropics, and apparently anything else with
8250 * alpha test or pixel discard.
8251 *
8252 * According to the spec, bit 11 (RCCUNIT) must also be set,
8253 * but we didn't debug actual testcases to find it out.
8254 */
8255 I915_WRITE(GEN6_UCGCTL2,
8256 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
8257 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
8258
8259 /*
8260 * According to the spec the following bits should be
8261 * set in order to enable memory self-refresh and fbc:
8262 * The bit21 and bit22 of 0x42000
8263 * The bit21 and bit22 of 0x42004
8264 * The bit5 and bit7 of 0x42020
8265 * The bit14 of 0x70180
8266 * The bit14 of 0x71180
8267 */
8268 I915_WRITE(ILK_DISPLAY_CHICKEN1,
8269 I915_READ(ILK_DISPLAY_CHICKEN1) |
8270 ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
8271 I915_WRITE(ILK_DISPLAY_CHICKEN2,
8272 I915_READ(ILK_DISPLAY_CHICKEN2) |
8273 ILK_DPARB_GATE | ILK_VSDPFD_FULL);
8274 I915_WRITE(ILK_DSPCLK_GATE,
8275 I915_READ(ILK_DSPCLK_GATE) |
8276 ILK_DPARB_CLK_GATE |
8277 ILK_DPFD_CLK_GATE);
8278
8279 for_each_pipe(pipe) {
8280 I915_WRITE(DSPCNTR(pipe),
8281 I915_READ(DSPCNTR(pipe)) |
8282 DISPPLANE_TRICKLE_FEED_DISABLE);
8283 intel_flush_display_plane(dev_priv, pipe);
8284 }
8285 }
8286
8287 static void ivybridge_init_clock_gating(struct drm_device *dev)
8288 {
8289 struct drm_i915_private *dev_priv = dev->dev_private;
8290 int pipe;
8291 uint32_t dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE;
8292
8293 I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate);
8294
8295 I915_WRITE(WM3_LP_ILK, 0);
8296 I915_WRITE(WM2_LP_ILK, 0);
8297 I915_WRITE(WM1_LP_ILK, 0);
8298
8299 I915_WRITE(ILK_DSPCLK_GATE, IVB_VRHUNIT_CLK_GATE);
8300
8301 for_each_pipe(pipe) {
8302 I915_WRITE(DSPCNTR(pipe),
8303 I915_READ(DSPCNTR(pipe)) |
8304 DISPPLANE_TRICKLE_FEED_DISABLE);
8305 intel_flush_display_plane(dev_priv, pipe);
8306 }
8307 }
8308
8309 static void g4x_init_clock_gating(struct drm_device *dev)
8310 {
8311 struct drm_i915_private *dev_priv = dev->dev_private;
8312 uint32_t dspclk_gate;
8313
8314 I915_WRITE(RENCLK_GATE_D1, 0);
8315 I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE |
8316 GS_UNIT_CLOCK_GATE_DISABLE |
8317 CL_UNIT_CLOCK_GATE_DISABLE);
8318 I915_WRITE(RAMCLK_GATE_D, 0);
8319 dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE |
8320 OVRUNIT_CLOCK_GATE_DISABLE |
8321 OVCUNIT_CLOCK_GATE_DISABLE;
8322 if (IS_GM45(dev))
8323 dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
8324 I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
8325 }
8326
8327 static void crestline_init_clock_gating(struct drm_device *dev)
8328 {
8329 struct drm_i915_private *dev_priv = dev->dev_private;
8330
8331 I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
8332 I915_WRITE(RENCLK_GATE_D2, 0);
8333 I915_WRITE(DSPCLK_GATE_D, 0);
8334 I915_WRITE(RAMCLK_GATE_D, 0);
8335 I915_WRITE16(DEUC, 0);
8336 }
8337
8338 static void broadwater_init_clock_gating(struct drm_device *dev)
8339 {
8340 struct drm_i915_private *dev_priv = dev->dev_private;
8341
8342 I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
8343 I965_RCC_CLOCK_GATE_DISABLE |
8344 I965_RCPB_CLOCK_GATE_DISABLE |
8345 I965_ISC_CLOCK_GATE_DISABLE |
8346 I965_FBC_CLOCK_GATE_DISABLE);
8347 I915_WRITE(RENCLK_GATE_D2, 0);
8348 }
8349
8350 static void gen3_init_clock_gating(struct drm_device *dev)
8351 {
8352 struct drm_i915_private *dev_priv = dev->dev_private;
8353 u32 dstate = I915_READ(D_STATE);
8354
8355 dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
8356 DSTATE_DOT_CLOCK_GATING;
8357 I915_WRITE(D_STATE, dstate);
8358 }
8359
8360 static void i85x_init_clock_gating(struct drm_device *dev)
8361 {
8362 struct drm_i915_private *dev_priv = dev->dev_private;
8363
8364 I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
8365 }
8366
8367 static void i830_init_clock_gating(struct drm_device *dev)
8368 {
8369 struct drm_i915_private *dev_priv = dev->dev_private;
8370
8371 I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
8372 }
8373
8374 static void ibx_init_clock_gating(struct drm_device *dev)
8375 {
8376 struct drm_i915_private *dev_priv = dev->dev_private;
8377
8378 /*
8379 * On Ibex Peak and Cougar Point, we need to disable clock
8380 * gating for the panel power sequencer or it will fail to
8381 * start up when no ports are active.
8382 */
8383 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
8384 }
8385
8386 static void cpt_init_clock_gating(struct drm_device *dev)
8387 {
8388 struct drm_i915_private *dev_priv = dev->dev_private;
8389 int pipe;
8390
8391 /*
8392 * On Ibex Peak and Cougar Point, we need to disable clock
8393 * gating for the panel power sequencer or it will fail to
8394 * start up when no ports are active.
8395 */
8396 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
8397 I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) |
8398 DPLS_EDP_PPS_FIX_DIS);
8399 /* Without this, mode sets may fail silently on FDI */
8400 for_each_pipe(pipe)
8401 I915_WRITE(TRANS_CHICKEN2(pipe), TRANS_AUTOTRAIN_GEN_STALL_DIS);
8402 }
8403
8404 static void ironlake_teardown_rc6(struct drm_device *dev)
8405 {
8406 struct drm_i915_private *dev_priv = dev->dev_private;
8407
8408 if (dev_priv->renderctx) {
8409 i915_gem_object_unpin(dev_priv->renderctx);
8410 drm_gem_object_unreference(&dev_priv->renderctx->base);
8411 dev_priv->renderctx = NULL;
8412 }
8413
8414 if (dev_priv->pwrctx) {
8415 i915_gem_object_unpin(dev_priv->pwrctx);
8416 drm_gem_object_unreference(&dev_priv->pwrctx->base);
8417 dev_priv->pwrctx = NULL;
8418 }
8419 }
8420
8421 static void ironlake_disable_rc6(struct drm_device *dev)
8422 {
8423 struct drm_i915_private *dev_priv = dev->dev_private;
8424
8425 if (I915_READ(PWRCTXA)) {
8426 /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
8427 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT);
8428 wait_for(((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON),
8429 50);
8430
8431 I915_WRITE(PWRCTXA, 0);
8432 POSTING_READ(PWRCTXA);
8433
8434 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
8435 POSTING_READ(RSTDBYCTL);
8436 }
8437
8438 ironlake_teardown_rc6(dev);
8439 }
8440
8441 static int ironlake_setup_rc6(struct drm_device *dev)
8442 {
8443 struct drm_i915_private *dev_priv = dev->dev_private;
8444
8445 if (dev_priv->renderctx == NULL)
8446 dev_priv->renderctx = intel_alloc_context_page(dev);
8447 if (!dev_priv->renderctx)
8448 return -ENOMEM;
8449
8450 if (dev_priv->pwrctx == NULL)
8451 dev_priv->pwrctx = intel_alloc_context_page(dev);
8452 if (!dev_priv->pwrctx) {
8453 ironlake_teardown_rc6(dev);
8454 return -ENOMEM;
8455 }
8456
8457 return 0;
8458 }
8459
8460 void ironlake_enable_rc6(struct drm_device *dev)
8461 {
8462 struct drm_i915_private *dev_priv = dev->dev_private;
8463 int ret;
8464
8465 /* rc6 disabled by default due to repeated reports of hanging during
8466 * boot and resume.
8467 */
8468 if (!intel_enable_rc6(dev))
8469 return;
8470
8471 mutex_lock(&dev->struct_mutex);
8472 ret = ironlake_setup_rc6(dev);
8473 if (ret) {
8474 mutex_unlock(&dev->struct_mutex);
8475 return;
8476 }
8477
8478 /*
8479 * GPU can automatically power down the render unit if given a page
8480 * to save state.
8481 */
8482 ret = BEGIN_LP_RING(6);
8483 if (ret) {
8484 ironlake_teardown_rc6(dev);
8485 mutex_unlock(&dev->struct_mutex);
8486 return;
8487 }
8488
8489 OUT_RING(MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN);
8490 OUT_RING(MI_SET_CONTEXT);
8491 OUT_RING(dev_priv->renderctx->gtt_offset |
8492 MI_MM_SPACE_GTT |
8493 MI_SAVE_EXT_STATE_EN |
8494 MI_RESTORE_EXT_STATE_EN |
8495 MI_RESTORE_INHIBIT);
8496 OUT_RING(MI_SUSPEND_FLUSH);
8497 OUT_RING(MI_NOOP);
8498 OUT_RING(MI_FLUSH);
8499 ADVANCE_LP_RING();
8500
8501 /*
8502 * Wait for the command parser to advance past MI_SET_CONTEXT. The HW
8503 * does an implicit flush, combined with MI_FLUSH above, it should be
8504 * safe to assume that renderctx is valid
8505 */
8506 ret = intel_wait_ring_idle(LP_RING(dev_priv));
8507 if (ret) {
8508 DRM_ERROR("failed to enable ironlake power power savings\n");
8509 ironlake_teardown_rc6(dev);
8510 mutex_unlock(&dev->struct_mutex);
8511 return;
8512 }
8513
8514 I915_WRITE(PWRCTXA, dev_priv->pwrctx->gtt_offset | PWRCTX_EN);
8515 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
8516 mutex_unlock(&dev->struct_mutex);
8517 }
8518
8519 void intel_init_clock_gating(struct drm_device *dev)
8520 {
8521 struct drm_i915_private *dev_priv = dev->dev_private;
8522
8523 dev_priv->display.init_clock_gating(dev);
8524
8525 if (dev_priv->display.init_pch_clock_gating)
8526 dev_priv->display.init_pch_clock_gating(dev);
8527 }
8528
8529 /* Set up chip specific display functions */
8530 static void intel_init_display(struct drm_device *dev)
8531 {
8532 struct drm_i915_private *dev_priv = dev->dev_private;
8533
8534 /* We always want a DPMS function */
8535 if (HAS_PCH_SPLIT(dev)) {
8536 dev_priv->display.dpms = ironlake_crtc_dpms;
8537 dev_priv->display.crtc_mode_set = ironlake_crtc_mode_set;
8538 dev_priv->display.update_plane = ironlake_update_plane;
8539 } else {
8540 dev_priv->display.dpms = i9xx_crtc_dpms;
8541 dev_priv->display.crtc_mode_set = i9xx_crtc_mode_set;
8542 dev_priv->display.update_plane = i9xx_update_plane;
8543 }
8544
8545 if (I915_HAS_FBC(dev)) {
8546 if (HAS_PCH_SPLIT(dev)) {
8547 dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
8548 dev_priv->display.enable_fbc = ironlake_enable_fbc;
8549 dev_priv->display.disable_fbc = ironlake_disable_fbc;
8550 } else if (IS_GM45(dev)) {
8551 dev_priv->display.fbc_enabled = g4x_fbc_enabled;
8552 dev_priv->display.enable_fbc = g4x_enable_fbc;
8553 dev_priv->display.disable_fbc = g4x_disable_fbc;
8554 } else if (IS_CRESTLINE(dev)) {
8555 dev_priv->display.fbc_enabled = i8xx_fbc_enabled;
8556 dev_priv->display.enable_fbc = i8xx_enable_fbc;
8557 dev_priv->display.disable_fbc = i8xx_disable_fbc;
8558 }
8559 /* 855GM needs testing */
8560 }
8561
8562 /* Returns the core display clock speed */
8563 if (IS_I945G(dev) || (IS_G33(dev) && !IS_PINEVIEW_M(dev)))
8564 dev_priv->display.get_display_clock_speed =
8565 i945_get_display_clock_speed;
8566 else if (IS_I915G(dev))
8567 dev_priv->display.get_display_clock_speed =
8568 i915_get_display_clock_speed;
8569 else if (IS_I945GM(dev) || IS_845G(dev) || IS_PINEVIEW_M(dev))
8570 dev_priv->display.get_display_clock_speed =
8571 i9xx_misc_get_display_clock_speed;
8572 else if (IS_I915GM(dev))
8573 dev_priv->display.get_display_clock_speed =
8574 i915gm_get_display_clock_speed;
8575 else if (IS_I865G(dev))
8576 dev_priv->display.get_display_clock_speed =
8577 i865_get_display_clock_speed;
8578 else if (IS_I85X(dev))
8579 dev_priv->display.get_display_clock_speed =
8580 i855_get_display_clock_speed;
8581 else /* 852, 830 */
8582 dev_priv->display.get_display_clock_speed =
8583 i830_get_display_clock_speed;
8584
8585 /* For FIFO watermark updates */
8586 if (HAS_PCH_SPLIT(dev)) {
8587 dev_priv->display.force_wake_get = __gen6_gt_force_wake_get;
8588 dev_priv->display.force_wake_put = __gen6_gt_force_wake_put;
8589
8590 /* IVB configs may use multi-threaded forcewake */
8591 if (IS_IVYBRIDGE(dev)) {
8592 u32 ecobus;
8593
8594 mutex_lock(&dev->struct_mutex);
8595 __gen6_gt_force_wake_mt_get(dev_priv);
8596 ecobus = I915_READ(ECOBUS);
8597 __gen6_gt_force_wake_mt_put(dev_priv);
8598 mutex_unlock(&dev->struct_mutex);
8599
8600 if (ecobus & FORCEWAKE_MT_ENABLE) {
8601 DRM_DEBUG_KMS("Using MT version of forcewake\n");
8602 dev_priv->display.force_wake_get =
8603 __gen6_gt_force_wake_mt_get;
8604 dev_priv->display.force_wake_put =
8605 __gen6_gt_force_wake_mt_put;
8606 }
8607 }
8608
8609 if (HAS_PCH_IBX(dev))
8610 dev_priv->display.init_pch_clock_gating = ibx_init_clock_gating;
8611 else if (HAS_PCH_CPT(dev))
8612 dev_priv->display.init_pch_clock_gating = cpt_init_clock_gating;
8613
8614 if (IS_GEN5(dev)) {
8615 if (I915_READ(MLTR_ILK) & ILK_SRLT_MASK)
8616 dev_priv->display.update_wm = ironlake_update_wm;
8617 else {
8618 DRM_DEBUG_KMS("Failed to get proper latency. "
8619 "Disable CxSR\n");
8620 dev_priv->display.update_wm = NULL;
8621 }
8622 dev_priv->display.fdi_link_train = ironlake_fdi_link_train;
8623 dev_priv->display.init_clock_gating = ironlake_init_clock_gating;
8624 dev_priv->display.write_eld = ironlake_write_eld;
8625 } else if (IS_GEN6(dev)) {
8626 if (SNB_READ_WM0_LATENCY()) {
8627 dev_priv->display.update_wm = sandybridge_update_wm;
8628 } else {
8629 DRM_DEBUG_KMS("Failed to read display plane latency. "
8630 "Disable CxSR\n");
8631 dev_priv->display.update_wm = NULL;
8632 }
8633 dev_priv->display.fdi_link_train = gen6_fdi_link_train;
8634 dev_priv->display.init_clock_gating = gen6_init_clock_gating;
8635 dev_priv->display.write_eld = ironlake_write_eld;
8636 } else if (IS_IVYBRIDGE(dev)) {
8637 /* FIXME: detect B0+ stepping and use auto training */
8638 dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
8639 if (SNB_READ_WM0_LATENCY()) {
8640 dev_priv->display.update_wm = sandybridge_update_wm;
8641 } else {
8642 DRM_DEBUG_KMS("Failed to read display plane latency. "
8643 "Disable CxSR\n");
8644 dev_priv->display.update_wm = NULL;
8645 }
8646 dev_priv->display.init_clock_gating = ivybridge_init_clock_gating;
8647 dev_priv->display.write_eld = ironlake_write_eld;
8648 } else
8649 dev_priv->display.update_wm = NULL;
8650 } else if (IS_PINEVIEW(dev)) {
8651 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev),
8652 dev_priv->is_ddr3,
8653 dev_priv->fsb_freq,
8654 dev_priv->mem_freq)) {
8655 DRM_INFO("failed to find known CxSR latency "
8656 "(found ddr%s fsb freq %d, mem freq %d), "
8657 "disabling CxSR\n",
8658 (dev_priv->is_ddr3 == 1) ? "3" : "2",
8659 dev_priv->fsb_freq, dev_priv->mem_freq);
8660 /* Disable CxSR and never update its watermark again */
8661 pineview_disable_cxsr(dev);
8662 dev_priv->display.update_wm = NULL;
8663 } else
8664 dev_priv->display.update_wm = pineview_update_wm;
8665 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
8666 } else if (IS_G4X(dev)) {
8667 dev_priv->display.write_eld = g4x_write_eld;
8668 dev_priv->display.update_wm = g4x_update_wm;
8669 dev_priv->display.init_clock_gating = g4x_init_clock_gating;
8670 } else if (IS_GEN4(dev)) {
8671 dev_priv->display.update_wm = i965_update_wm;
8672 if (IS_CRESTLINE(dev))
8673 dev_priv->display.init_clock_gating = crestline_init_clock_gating;
8674 else if (IS_BROADWATER(dev))
8675 dev_priv->display.init_clock_gating = broadwater_init_clock_gating;
8676 } else if (IS_GEN3(dev)) {
8677 dev_priv->display.update_wm = i9xx_update_wm;
8678 dev_priv->display.get_fifo_size = i9xx_get_fifo_size;
8679 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
8680 } else if (IS_I865G(dev)) {
8681 dev_priv->display.update_wm = i830_update_wm;
8682 dev_priv->display.init_clock_gating = i85x_init_clock_gating;
8683 dev_priv->display.get_fifo_size = i830_get_fifo_size;
8684 } else if (IS_I85X(dev)) {
8685 dev_priv->display.update_wm = i9xx_update_wm;
8686 dev_priv->display.get_fifo_size = i85x_get_fifo_size;
8687 dev_priv->display.init_clock_gating = i85x_init_clock_gating;
8688 } else {
8689 dev_priv->display.update_wm = i830_update_wm;
8690 dev_priv->display.init_clock_gating = i830_init_clock_gating;
8691 if (IS_845G(dev))
8692 dev_priv->display.get_fifo_size = i845_get_fifo_size;
8693 else
8694 dev_priv->display.get_fifo_size = i830_get_fifo_size;
8695 }
8696
8697 /* Default just returns -ENODEV to indicate unsupported */
8698 dev_priv->display.queue_flip = intel_default_queue_flip;
8699
8700 switch (INTEL_INFO(dev)->gen) {
8701 case 2:
8702 dev_priv->display.queue_flip = intel_gen2_queue_flip;
8703 break;
8704
8705 case 3:
8706 dev_priv->display.queue_flip = intel_gen3_queue_flip;
8707 break;
8708
8709 case 4:
8710 case 5:
8711 dev_priv->display.queue_flip = intel_gen4_queue_flip;
8712 break;
8713
8714 case 6:
8715 dev_priv->display.queue_flip = intel_gen6_queue_flip;
8716 break;
8717 case 7:
8718 dev_priv->display.queue_flip = intel_gen7_queue_flip;
8719 break;
8720 }
8721 }
8722
8723 /*
8724 * Some BIOSes insist on assuming the GPU's pipe A is enabled at suspend,
8725 * resume, or other times. This quirk makes sure that's the case for
8726 * affected systems.
8727 */
8728 static void quirk_pipea_force(struct drm_device *dev)
8729 {
8730 struct drm_i915_private *dev_priv = dev->dev_private;
8731
8732 dev_priv->quirks |= QUIRK_PIPEA_FORCE;
8733 DRM_DEBUG_DRIVER("applying pipe a force quirk\n");
8734 }
8735
8736 /*
8737 * Some machines (Lenovo U160) do not work with SSC on LVDS for some reason
8738 */
8739 static void quirk_ssc_force_disable(struct drm_device *dev)
8740 {
8741 struct drm_i915_private *dev_priv = dev->dev_private;
8742 dev_priv->quirks |= QUIRK_LVDS_SSC_DISABLE;
8743 }
8744
8745 struct intel_quirk {
8746 int device;
8747 int subsystem_vendor;
8748 int subsystem_device;
8749 void (*hook)(struct drm_device *dev);
8750 };
8751
8752 struct intel_quirk intel_quirks[] = {
8753 /* HP Compaq 2730p needs pipe A force quirk (LP: #291555) */
8754 { 0x2a42, 0x103c, 0x30eb, quirk_pipea_force },
8755 /* HP Mini needs pipe A force quirk (LP: #322104) */
8756 { 0x27ae, 0x103c, 0x361a, quirk_pipea_force },
8757
8758 /* Thinkpad R31 needs pipe A force quirk */
8759 { 0x3577, 0x1014, 0x0505, quirk_pipea_force },
8760 /* Toshiba Protege R-205, S-209 needs pipe A force quirk */
8761 { 0x2592, 0x1179, 0x0001, quirk_pipea_force },
8762
8763 /* ThinkPad X30 needs pipe A force quirk (LP: #304614) */
8764 { 0x3577, 0x1014, 0x0513, quirk_pipea_force },
8765 /* ThinkPad X40 needs pipe A force quirk */
8766
8767 /* ThinkPad T60 needs pipe A force quirk (bug #16494) */
8768 { 0x2782, 0x17aa, 0x201a, quirk_pipea_force },
8769
8770 /* 855 & before need to leave pipe A & dpll A up */
8771 { 0x3582, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
8772 { 0x2562, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
8773
8774 /* Lenovo U160 cannot use SSC on LVDS */
8775 { 0x0046, 0x17aa, 0x3920, quirk_ssc_force_disable },
8776
8777 /* Sony Vaio Y cannot use SSC on LVDS */
8778 { 0x0046, 0x104d, 0x9076, quirk_ssc_force_disable },
8779 };
8780
8781 static void intel_init_quirks(struct drm_device *dev)
8782 {
8783 struct pci_dev *d = dev->pdev;
8784 int i;
8785
8786 for (i = 0; i < ARRAY_SIZE(intel_quirks); i++) {
8787 struct intel_quirk *q = &intel_quirks[i];
8788
8789 if (d->device == q->device &&
8790 (d->subsystem_vendor == q->subsystem_vendor ||
8791 q->subsystem_vendor == PCI_ANY_ID) &&
8792 (d->subsystem_device == q->subsystem_device ||
8793 q->subsystem_device == PCI_ANY_ID))
8794 q->hook(dev);
8795 }
8796 }
8797
8798 /* Disable the VGA plane that we never use */
8799 static void i915_disable_vga(struct drm_device *dev)
8800 {
8801 struct drm_i915_private *dev_priv = dev->dev_private;
8802 u8 sr1;
8803 u32 vga_reg;
8804
8805 if (HAS_PCH_SPLIT(dev))
8806 vga_reg = CPU_VGACNTRL;
8807 else
8808 vga_reg = VGACNTRL;
8809
8810 vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
8811 outb(1, VGA_SR_INDEX);
8812 sr1 = inb(VGA_SR_DATA);
8813 outb(sr1 | 1<<5, VGA_SR_DATA);
8814 vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
8815 udelay(300);
8816
8817 I915_WRITE(vga_reg, VGA_DISP_DISABLE);
8818 POSTING_READ(vga_reg);
8819 }
8820
8821 void intel_modeset_init(struct drm_device *dev)
8822 {
8823 struct drm_i915_private *dev_priv = dev->dev_private;
8824 int i;
8825
8826 drm_mode_config_init(dev);
8827
8828 dev->mode_config.min_width = 0;
8829 dev->mode_config.min_height = 0;
8830
8831 dev->mode_config.funcs = (void *)&intel_mode_funcs;
8832
8833 intel_init_quirks(dev);
8834
8835 intel_init_display(dev);
8836
8837 if (IS_GEN2(dev)) {
8838 dev->mode_config.max_width = 2048;
8839 dev->mode_config.max_height = 2048;
8840 } else if (IS_GEN3(dev)) {
8841 dev->mode_config.max_width = 4096;
8842 dev->mode_config.max_height = 4096;
8843 } else {
8844 dev->mode_config.max_width = 8192;
8845 dev->mode_config.max_height = 8192;
8846 }
8847 dev->mode_config.fb_base = dev->agp->base;
8848
8849 DRM_DEBUG_KMS("%d display pipe%s available.\n",
8850 dev_priv->num_pipe, dev_priv->num_pipe > 1 ? "s" : "");
8851
8852 for (i = 0; i < dev_priv->num_pipe; i++) {
8853 intel_crtc_init(dev, i);
8854 }
8855
8856 /* Just disable it once at startup */
8857 i915_disable_vga(dev);
8858 intel_setup_outputs(dev);
8859
8860 intel_init_clock_gating(dev);
8861
8862 if (IS_IRONLAKE_M(dev)) {
8863 ironlake_enable_drps(dev);
8864 intel_init_emon(dev);
8865 }
8866
8867 if (IS_GEN6(dev) || IS_GEN7(dev)) {
8868 gen6_enable_rps(dev_priv);
8869 gen6_update_ring_freq(dev_priv);
8870 }
8871
8872 INIT_WORK(&dev_priv->idle_work, intel_idle_update);
8873 setup_timer(&dev_priv->idle_timer, intel_gpu_idle_timer,
8874 (unsigned long)dev);
8875 }
8876
8877 void intel_modeset_gem_init(struct drm_device *dev)
8878 {
8879 if (IS_IRONLAKE_M(dev))
8880 ironlake_enable_rc6(dev);
8881
8882 intel_setup_overlay(dev);
8883 }
8884
8885 void intel_modeset_cleanup(struct drm_device *dev)
8886 {
8887 struct drm_i915_private *dev_priv = dev->dev_private;
8888 struct drm_crtc *crtc;
8889 struct intel_crtc *intel_crtc;
8890
8891 drm_kms_helper_poll_fini(dev);
8892 mutex_lock(&dev->struct_mutex);
8893
8894 intel_unregister_dsm_handler();
8895
8896
8897 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
8898 /* Skip inactive CRTCs */
8899 if (!crtc->fb)
8900 continue;
8901
8902 intel_crtc = to_intel_crtc(crtc);
8903 intel_increase_pllclock(crtc);
8904 }
8905
8906 intel_disable_fbc(dev);
8907
8908 if (IS_IRONLAKE_M(dev))
8909 ironlake_disable_drps(dev);
8910 if (IS_GEN6(dev) || IS_GEN7(dev))
8911 gen6_disable_rps(dev);
8912
8913 if (IS_IRONLAKE_M(dev))
8914 ironlake_disable_rc6(dev);
8915
8916 mutex_unlock(&dev->struct_mutex);
8917
8918 /* Disable the irq before mode object teardown, for the irq might
8919 * enqueue unpin/hotplug work. */
8920 drm_irq_uninstall(dev);
8921 cancel_work_sync(&dev_priv->hotplug_work);
8922 cancel_work_sync(&dev_priv->rps_work);
8923
8924 /* flush any delayed tasks or pending work */
8925 flush_scheduled_work();
8926
8927 /* Shut off idle work before the crtcs get freed. */
8928 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
8929 intel_crtc = to_intel_crtc(crtc);
8930 del_timer_sync(&intel_crtc->idle_timer);
8931 }
8932 del_timer_sync(&dev_priv->idle_timer);
8933 cancel_work_sync(&dev_priv->idle_work);
8934
8935 drm_mode_config_cleanup(dev);
8936 }
8937
8938 /*
8939 * Return which encoder is currently attached for connector.
8940 */
8941 struct drm_encoder *intel_best_encoder(struct drm_connector *connector)
8942 {
8943 return &intel_attached_encoder(connector)->base;
8944 }
8945
8946 void intel_connector_attach_encoder(struct intel_connector *connector,
8947 struct intel_encoder *encoder)
8948 {
8949 connector->encoder = encoder;
8950 drm_mode_connector_attach_encoder(&connector->base,
8951 &encoder->base);
8952 }
8953
8954 /*
8955 * set vga decode state - true == enable VGA decode
8956 */
8957 int intel_modeset_vga_set_state(struct drm_device *dev, bool state)
8958 {
8959 struct drm_i915_private *dev_priv = dev->dev_private;
8960 u16 gmch_ctrl;
8961
8962 pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &gmch_ctrl);
8963 if (state)
8964 gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
8965 else
8966 gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
8967 pci_write_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, gmch_ctrl);
8968 return 0;
8969 }
8970
8971 #ifdef CONFIG_DEBUG_FS
8972 #include <linux/seq_file.h>
8973
8974 struct intel_display_error_state {
8975 struct intel_cursor_error_state {
8976 u32 control;
8977 u32 position;
8978 u32 base;
8979 u32 size;
8980 } cursor[2];
8981
8982 struct intel_pipe_error_state {
8983 u32 conf;
8984 u32 source;
8985
8986 u32 htotal;
8987 u32 hblank;
8988 u32 hsync;
8989 u32 vtotal;
8990 u32 vblank;
8991 u32 vsync;
8992 } pipe[2];
8993
8994 struct intel_plane_error_state {
8995 u32 control;
8996 u32 stride;
8997 u32 size;
8998 u32 pos;
8999 u32 addr;
9000 u32 surface;
9001 u32 tile_offset;
9002 } plane[2];
9003 };
9004
9005 struct intel_display_error_state *
9006 intel_display_capture_error_state(struct drm_device *dev)
9007 {
9008 drm_i915_private_t *dev_priv = dev->dev_private;
9009 struct intel_display_error_state *error;
9010 int i;
9011
9012 error = kmalloc(sizeof(*error), GFP_ATOMIC);
9013 if (error == NULL)
9014 return NULL;
9015
9016 for (i = 0; i < 2; i++) {
9017 error->cursor[i].control = I915_READ(CURCNTR(i));
9018 error->cursor[i].position = I915_READ(CURPOS(i));
9019 error->cursor[i].base = I915_READ(CURBASE(i));
9020
9021 error->plane[i].control = I915_READ(DSPCNTR(i));
9022 error->plane[i].stride = I915_READ(DSPSTRIDE(i));
9023 error->plane[i].size = I915_READ(DSPSIZE(i));
9024 error->plane[i].pos = I915_READ(DSPPOS(i));
9025 error->plane[i].addr = I915_READ(DSPADDR(i));
9026 if (INTEL_INFO(dev)->gen >= 4) {
9027 error->plane[i].surface = I915_READ(DSPSURF(i));
9028 error->plane[i].tile_offset = I915_READ(DSPTILEOFF(i));
9029 }
9030
9031 error->pipe[i].conf = I915_READ(PIPECONF(i));
9032 error->pipe[i].source = I915_READ(PIPESRC(i));
9033 error->pipe[i].htotal = I915_READ(HTOTAL(i));
9034 error->pipe[i].hblank = I915_READ(HBLANK(i));
9035 error->pipe[i].hsync = I915_READ(HSYNC(i));
9036 error->pipe[i].vtotal = I915_READ(VTOTAL(i));
9037 error->pipe[i].vblank = I915_READ(VBLANK(i));
9038 error->pipe[i].vsync = I915_READ(VSYNC(i));
9039 }
9040
9041 return error;
9042 }
9043
9044 void
9045 intel_display_print_error_state(struct seq_file *m,
9046 struct drm_device *dev,
9047 struct intel_display_error_state *error)
9048 {
9049 int i;
9050
9051 for (i = 0; i < 2; i++) {
9052 seq_printf(m, "Pipe [%d]:\n", i);
9053 seq_printf(m, " CONF: %08x\n", error->pipe[i].conf);
9054 seq_printf(m, " SRC: %08x\n", error->pipe[i].source);
9055 seq_printf(m, " HTOTAL: %08x\n", error->pipe[i].htotal);
9056 seq_printf(m, " HBLANK: %08x\n", error->pipe[i].hblank);
9057 seq_printf(m, " HSYNC: %08x\n", error->pipe[i].hsync);
9058 seq_printf(m, " VTOTAL: %08x\n", error->pipe[i].vtotal);
9059 seq_printf(m, " VBLANK: %08x\n", error->pipe[i].vblank);
9060 seq_printf(m, " VSYNC: %08x\n", error->pipe[i].vsync);
9061
9062 seq_printf(m, "Plane [%d]:\n", i);
9063 seq_printf(m, " CNTR: %08x\n", error->plane[i].control);
9064 seq_printf(m, " STRIDE: %08x\n", error->plane[i].stride);
9065 seq_printf(m, " SIZE: %08x\n", error->plane[i].size);
9066 seq_printf(m, " POS: %08x\n", error->plane[i].pos);
9067 seq_printf(m, " ADDR: %08x\n", error->plane[i].addr);
9068 if (INTEL_INFO(dev)->gen >= 4) {
9069 seq_printf(m, " SURF: %08x\n", error->plane[i].surface);
9070 seq_printf(m, " TILEOFF: %08x\n", error->plane[i].tile_offset);
9071 }
9072
9073 seq_printf(m, "Cursor [%d]:\n", i);
9074 seq_printf(m, " CNTR: %08x\n", error->cursor[i].control);
9075 seq_printf(m, " POS: %08x\n", error->cursor[i].position);
9076 seq_printf(m, " BASE: %08x\n", error->cursor[i].base);
9077 }
9078 }
9079 #endif
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree