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i915: signedness bug in check_overlay_src()
[linux-2.6/cjktty.git] / drivers / gpu / drm / i915 / intel_overlay.c
blob02ff0a481f470cea6e3f4f109805e07fbd84725e
1 /*
2 * Copyright © 2009
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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors:
24 * Daniel Vetter <daniel@ffwll.ch>
25 *
26 * Derived from Xorg ddx, xf86-video-intel, src/i830_video.c
27 */
28
29 #include <linux/seq_file.h>
30 #include "drmP.h"
31 #include "drm.h"
32 #include "i915_drm.h"
33 #include "i915_drv.h"
34 #include "i915_reg.h"
35 #include "intel_drv.h"
36
37 /* Limits for overlay size. According to intel doc, the real limits are:
38 * Y width: 4095, UV width (planar): 2047, Y height: 2047,
39 * UV width (planar): * 1023. But the xorg thinks 2048 for height and width. Use
40 * the mininum of both. */
41 #define IMAGE_MAX_WIDTH 2048
42 #define IMAGE_MAX_HEIGHT 2046 /* 2 * 1023 */
43 /* on 830 and 845 these large limits result in the card hanging */
44 #define IMAGE_MAX_WIDTH_LEGACY 1024
45 #define IMAGE_MAX_HEIGHT_LEGACY 1088
46
47 /* overlay register definitions */
48 /* OCMD register */
49 #define OCMD_TILED_SURFACE (0x1<<19)
50 #define OCMD_MIRROR_MASK (0x3<<17)
51 #define OCMD_MIRROR_MODE (0x3<<17)
52 #define OCMD_MIRROR_HORIZONTAL (0x1<<17)
53 #define OCMD_MIRROR_VERTICAL (0x2<<17)
54 #define OCMD_MIRROR_BOTH (0x3<<17)
55 #define OCMD_BYTEORDER_MASK (0x3<<14) /* zero for YUYV or FOURCC YUY2 */
56 #define OCMD_UV_SWAP (0x1<<14) /* YVYU */
57 #define OCMD_Y_SWAP (0x2<<14) /* UYVY or FOURCC UYVY */
58 #define OCMD_Y_AND_UV_SWAP (0x3<<14) /* VYUY */
59 #define OCMD_SOURCE_FORMAT_MASK (0xf<<10)
60 #define OCMD_RGB_888 (0x1<<10) /* not in i965 Intel docs */
61 #define OCMD_RGB_555 (0x2<<10) /* not in i965 Intel docs */
62 #define OCMD_RGB_565 (0x3<<10) /* not in i965 Intel docs */
63 #define OCMD_YUV_422_PACKED (0x8<<10)
64 #define OCMD_YUV_411_PACKED (0x9<<10) /* not in i965 Intel docs */
65 #define OCMD_YUV_420_PLANAR (0xc<<10)
66 #define OCMD_YUV_422_PLANAR (0xd<<10)
67 #define OCMD_YUV_410_PLANAR (0xe<<10) /* also 411 */
68 #define OCMD_TVSYNCFLIP_PARITY (0x1<<9)
69 #define OCMD_TVSYNCFLIP_ENABLE (0x1<<7)
70 #define OCMD_BUF_TYPE_MASK (0x1<<5)
71 #define OCMD_BUF_TYPE_FRAME (0x0<<5)
72 #define OCMD_BUF_TYPE_FIELD (0x1<<5)
73 #define OCMD_TEST_MODE (0x1<<4)
74 #define OCMD_BUFFER_SELECT (0x3<<2)
75 #define OCMD_BUFFER0 (0x0<<2)
76 #define OCMD_BUFFER1 (0x1<<2)
77 #define OCMD_FIELD_SELECT (0x1<<2)
78 #define OCMD_FIELD0 (0x0<<1)
79 #define OCMD_FIELD1 (0x1<<1)
80 #define OCMD_ENABLE (0x1<<0)
81
82 /* OCONFIG register */
83 #define OCONF_PIPE_MASK (0x1<<18)
84 #define OCONF_PIPE_A (0x0<<18)
85 #define OCONF_PIPE_B (0x1<<18)
86 #define OCONF_GAMMA2_ENABLE (0x1<<16)
87 #define OCONF_CSC_MODE_BT601 (0x0<<5)
88 #define OCONF_CSC_MODE_BT709 (0x1<<5)
89 #define OCONF_CSC_BYPASS (0x1<<4)
90 #define OCONF_CC_OUT_8BIT (0x1<<3)
91 #define OCONF_TEST_MODE (0x1<<2)
92 #define OCONF_THREE_LINE_BUFFER (0x1<<0)
93 #define OCONF_TWO_LINE_BUFFER (0x0<<0)
94
95 /* DCLRKM (dst-key) register */
96 #define DST_KEY_ENABLE (0x1<<31)
97 #define CLK_RGB24_MASK 0x0
98 #define CLK_RGB16_MASK 0x070307
99 #define CLK_RGB15_MASK 0x070707
100 #define CLK_RGB8I_MASK 0xffffff
101
102 #define RGB16_TO_COLORKEY(c) \
103 (((c & 0xF800) << 8) | ((c & 0x07E0) << 5) | ((c & 0x001F) << 3))
104 #define RGB15_TO_COLORKEY(c) \
105 (((c & 0x7c00) << 9) | ((c & 0x03E0) << 6) | ((c & 0x001F) << 3))
106
107 /* overlay flip addr flag */
108 #define OFC_UPDATE 0x1
109
110 /* polyphase filter coefficients */
111 #define N_HORIZ_Y_TAPS 5
112 #define N_VERT_Y_TAPS 3
113 #define N_HORIZ_UV_TAPS 3
114 #define N_VERT_UV_TAPS 3
115 #define N_PHASES 17
116 #define MAX_TAPS 5
117
118 /* memory bufferd overlay registers */
119 struct overlay_registers {
120 u32 OBUF_0Y;
121 u32 OBUF_1Y;
122 u32 OBUF_0U;
123 u32 OBUF_0V;
124 u32 OBUF_1U;
125 u32 OBUF_1V;
126 u32 OSTRIDE;
127 u32 YRGB_VPH;
128 u32 UV_VPH;
129 u32 HORZ_PH;
130 u32 INIT_PHS;
131 u32 DWINPOS;
132 u32 DWINSZ;
133 u32 SWIDTH;
134 u32 SWIDTHSW;
135 u32 SHEIGHT;
136 u32 YRGBSCALE;
137 u32 UVSCALE;
138 u32 OCLRC0;
139 u32 OCLRC1;
140 u32 DCLRKV;
141 u32 DCLRKM;
142 u32 SCLRKVH;
143 u32 SCLRKVL;
144 u32 SCLRKEN;
145 u32 OCONFIG;
146 u32 OCMD;
147 u32 RESERVED1; /* 0x6C */
148 u32 OSTART_0Y;
149 u32 OSTART_1Y;
150 u32 OSTART_0U;
151 u32 OSTART_0V;
152 u32 OSTART_1U;
153 u32 OSTART_1V;
154 u32 OTILEOFF_0Y;
155 u32 OTILEOFF_1Y;
156 u32 OTILEOFF_0U;
157 u32 OTILEOFF_0V;
158 u32 OTILEOFF_1U;
159 u32 OTILEOFF_1V;
160 u32 FASTHSCALE; /* 0xA0 */
161 u32 UVSCALEV; /* 0xA4 */
162 u32 RESERVEDC[(0x200 - 0xA8) / 4]; /* 0xA8 - 0x1FC */
163 u16 Y_VCOEFS[N_VERT_Y_TAPS * N_PHASES]; /* 0x200 */
164 u16 RESERVEDD[0x100 / 2 - N_VERT_Y_TAPS * N_PHASES];
165 u16 Y_HCOEFS[N_HORIZ_Y_TAPS * N_PHASES]; /* 0x300 */
166 u16 RESERVEDE[0x200 / 2 - N_HORIZ_Y_TAPS * N_PHASES];
167 u16 UV_VCOEFS[N_VERT_UV_TAPS * N_PHASES]; /* 0x500 */
168 u16 RESERVEDF[0x100 / 2 - N_VERT_UV_TAPS * N_PHASES];
169 u16 UV_HCOEFS[N_HORIZ_UV_TAPS * N_PHASES]; /* 0x600 */
170 u16 RESERVEDG[0x100 / 2 - N_HORIZ_UV_TAPS * N_PHASES];
171 };
172
173 struct intel_overlay {
174 struct drm_device *dev;
175 struct intel_crtc *crtc;
176 struct drm_i915_gem_object *vid_bo;
177 struct drm_i915_gem_object *old_vid_bo;
178 int active;
179 int pfit_active;
180 u32 pfit_vscale_ratio; /* shifted-point number, (1<<12) == 1.0 */
181 u32 color_key;
182 u32 brightness, contrast, saturation;
183 u32 old_xscale, old_yscale;
184 /* register access */
185 u32 flip_addr;
186 struct drm_i915_gem_object *reg_bo;
187 /* flip handling */
188 uint32_t last_flip_req;
189 void (*flip_tail)(struct intel_overlay *);
190 };
191
192 static struct overlay_registers *
193 intel_overlay_map_regs(struct intel_overlay *overlay)
194 {
195 drm_i915_private_t *dev_priv = overlay->dev->dev_private;
196 struct overlay_registers *regs;
197
198 if (OVERLAY_NEEDS_PHYSICAL(overlay->dev))
199 regs = overlay->reg_bo->phys_obj->handle->vaddr;
200 else
201 regs = io_mapping_map_wc(dev_priv->mm.gtt_mapping,
202 overlay->reg_bo->gtt_offset);
203
204 return regs;
205 }
206
207 static void intel_overlay_unmap_regs(struct intel_overlay *overlay,
208 struct overlay_registers *regs)
209 {
210 if (!OVERLAY_NEEDS_PHYSICAL(overlay->dev))
211 io_mapping_unmap(regs);
212 }
213
214 static int intel_overlay_do_wait_request(struct intel_overlay *overlay,
215 struct drm_i915_gem_request *request,
216 bool interruptible,
217 void (*tail)(struct intel_overlay *))
218 {
219 struct drm_device *dev = overlay->dev;
220 drm_i915_private_t *dev_priv = dev->dev_private;
221 int ret;
222
223 BUG_ON(overlay->last_flip_req);
224 overlay->last_flip_req =
225 i915_add_request(dev, NULL, request, &dev_priv->render_ring);
226 if (overlay->last_flip_req == 0)
227 return -ENOMEM;
228
229 overlay->flip_tail = tail;
230 ret = i915_do_wait_request(dev,
231 overlay->last_flip_req, true,
232 &dev_priv->render_ring);
233 if (ret)
234 return ret;
235
236 overlay->last_flip_req = 0;
237 return 0;
238 }
239
240 /* Workaround for i830 bug where pipe a must be enable to change control regs */
241 static int
242 i830_activate_pipe_a(struct drm_device *dev)
243 {
244 drm_i915_private_t *dev_priv = dev->dev_private;
245 struct intel_crtc *crtc;
246 struct drm_crtc_helper_funcs *crtc_funcs;
247 struct drm_display_mode vesa_640x480 = {
248 DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
249 752, 800, 0, 480, 489, 492, 525, 0,
250 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)
251 }, *mode;
252
253 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[0]);
254 if (crtc->dpms_mode == DRM_MODE_DPMS_ON)
255 return 0;
256
257 /* most i8xx have pipe a forced on, so don't trust dpms mode */
258 if (I915_READ(PIPEACONF) & PIPECONF_ENABLE)
259 return 0;
260
261 crtc_funcs = crtc->base.helper_private;
262 if (crtc_funcs->dpms == NULL)
263 return 0;
264
265 DRM_DEBUG_DRIVER("Enabling pipe A in order to enable overlay\n");
266
267 mode = drm_mode_duplicate(dev, &vesa_640x480);
268 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
269 if(!drm_crtc_helper_set_mode(&crtc->base, mode,
270 crtc->base.x, crtc->base.y,
271 crtc->base.fb))
272 return 0;
273
274 crtc_funcs->dpms(&crtc->base, DRM_MODE_DPMS_ON);
275 return 1;
276 }
277
278 static void
279 i830_deactivate_pipe_a(struct drm_device *dev)
280 {
281 drm_i915_private_t *dev_priv = dev->dev_private;
282 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[0];
283 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
284
285 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
286 }
287
288 /* overlay needs to be disable in OCMD reg */
289 static int intel_overlay_on(struct intel_overlay *overlay)
290 {
291 struct drm_device *dev = overlay->dev;
292 struct drm_i915_gem_request *request;
293 int pipe_a_quirk = 0;
294 int ret;
295
296 BUG_ON(overlay->active);
297 overlay->active = 1;
298
299 if (IS_I830(dev)) {
300 pipe_a_quirk = i830_activate_pipe_a(dev);
301 if (pipe_a_quirk < 0)
302 return pipe_a_quirk;
303 }
304
305 request = kzalloc(sizeof(*request), GFP_KERNEL);
306 if (request == NULL) {
307 ret = -ENOMEM;
308 goto out;
309 }
310
311 BEGIN_LP_RING(4);
312 OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_ON);
313 OUT_RING(overlay->flip_addr | OFC_UPDATE);
314 OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
315 OUT_RING(MI_NOOP);
316 ADVANCE_LP_RING();
317
318 ret = intel_overlay_do_wait_request(overlay, request, true, NULL);
319 out:
320 if (pipe_a_quirk)
321 i830_deactivate_pipe_a(dev);
322
323 return ret;
324 }
325
326 /* overlay needs to be enabled in OCMD reg */
327 static int intel_overlay_continue(struct intel_overlay *overlay,
328 bool load_polyphase_filter)
329 {
330 struct drm_device *dev = overlay->dev;
331 drm_i915_private_t *dev_priv = dev->dev_private;
332 struct drm_i915_gem_request *request;
333 u32 flip_addr = overlay->flip_addr;
334 u32 tmp;
335
336 BUG_ON(!overlay->active);
337
338 request = kzalloc(sizeof(*request), GFP_KERNEL);
339 if (request == NULL)
340 return -ENOMEM;
341
342 if (load_polyphase_filter)
343 flip_addr |= OFC_UPDATE;
344
345 /* check for underruns */
346 tmp = I915_READ(DOVSTA);
347 if (tmp & (1 << 17))
348 DRM_DEBUG("overlay underrun, DOVSTA: %x\n", tmp);
349
350 BEGIN_LP_RING(2);
351 OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
352 OUT_RING(flip_addr);
353 ADVANCE_LP_RING();
354
355 overlay->last_flip_req =
356 i915_add_request(dev, NULL, request, &dev_priv->render_ring);
357 return 0;
358 }
359
360 static void intel_overlay_release_old_vid_tail(struct intel_overlay *overlay)
361 {
362 struct drm_gem_object *obj = &overlay->old_vid_bo->base;
363
364 i915_gem_object_unpin(obj);
365 drm_gem_object_unreference(obj);
366
367 overlay->old_vid_bo = NULL;
368 }
369
370 static void intel_overlay_off_tail(struct intel_overlay *overlay)
371 {
372 struct drm_gem_object *obj;
373
374 /* never have the overlay hw on without showing a frame */
375 BUG_ON(!overlay->vid_bo);
376 obj = &overlay->vid_bo->base;
377
378 i915_gem_object_unpin(obj);
379 drm_gem_object_unreference(obj);
380 overlay->vid_bo = NULL;
381
382 overlay->crtc->overlay = NULL;
383 overlay->crtc = NULL;
384 overlay->active = 0;
385 }
386
387 /* overlay needs to be disabled in OCMD reg */
388 static int intel_overlay_off(struct intel_overlay *overlay,
389 bool interruptible)
390 {
391 struct drm_device *dev = overlay->dev;
392 u32 flip_addr = overlay->flip_addr;
393 struct drm_i915_gem_request *request;
394
395 BUG_ON(!overlay->active);
396
397 request = kzalloc(sizeof(*request), GFP_KERNEL);
398 if (request == NULL)
399 return -ENOMEM;
400
401 /* According to intel docs the overlay hw may hang (when switching
402 * off) without loading the filter coeffs. It is however unclear whether
403 * this applies to the disabling of the overlay or to the switching off
404 * of the hw. Do it in both cases */
405 flip_addr |= OFC_UPDATE;
406
407 BEGIN_LP_RING(6);
408 /* wait for overlay to go idle */
409 OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
410 OUT_RING(flip_addr);
411 OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
412 /* turn overlay off */
413 OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
414 OUT_RING(flip_addr);
415 OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
416 ADVANCE_LP_RING();
417
418 return intel_overlay_do_wait_request(overlay, request, interruptible,
419 intel_overlay_off_tail);
420 }
421
422 /* recover from an interruption due to a signal
423 * We have to be careful not to repeat work forever an make forward progess. */
424 static int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay,
425 bool interruptible)
426 {
427 struct drm_device *dev = overlay->dev;
428 drm_i915_private_t *dev_priv = dev->dev_private;
429 int ret;
430
431 if (overlay->last_flip_req == 0)
432 return 0;
433
434 ret = i915_do_wait_request(dev, overlay->last_flip_req,
435 interruptible, &dev_priv->render_ring);
436 if (ret)
437 return ret;
438
439 if (overlay->flip_tail)
440 overlay->flip_tail(overlay);
441
442 overlay->last_flip_req = 0;
443 return 0;
444 }
445
446 /* Wait for pending overlay flip and release old frame.
447 * Needs to be called before the overlay register are changed
448 * via intel_overlay_(un)map_regs
449 */
450 static int intel_overlay_release_old_vid(struct intel_overlay *overlay)
451 {
452 struct drm_device *dev = overlay->dev;
453 drm_i915_private_t *dev_priv = dev->dev_private;
454 int ret;
455
456 /* Only wait if there is actually an old frame to release to
457 * guarantee forward progress.
458 */
459 if (!overlay->old_vid_bo)
460 return 0;
461
462 if (I915_READ(ISR) & I915_OVERLAY_PLANE_FLIP_PENDING_INTERRUPT) {
463 struct drm_i915_gem_request *request;
464
465 /* synchronous slowpath */
466 request = kzalloc(sizeof(*request), GFP_KERNEL);
467 if (request == NULL)
468 return -ENOMEM;
469
470 BEGIN_LP_RING(2);
471 OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
472 OUT_RING(MI_NOOP);
473 ADVANCE_LP_RING();
474
475 ret = intel_overlay_do_wait_request(overlay, request, true,
476 intel_overlay_release_old_vid_tail);
477 if (ret)
478 return ret;
479 }
480
481 intel_overlay_release_old_vid_tail(overlay);
482 return 0;
483 }
484
485 struct put_image_params {
486 int format;
487 short dst_x;
488 short dst_y;
489 short dst_w;
490 short dst_h;
491 short src_w;
492 short src_scan_h;
493 short src_scan_w;
494 short src_h;
495 short stride_Y;
496 short stride_UV;
497 int offset_Y;
498 int offset_U;
499 int offset_V;
500 };
501
502 static int packed_depth_bytes(u32 format)
503 {
504 switch (format & I915_OVERLAY_DEPTH_MASK) {
505 case I915_OVERLAY_YUV422:
506 return 4;
507 case I915_OVERLAY_YUV411:
508 /* return 6; not implemented */
509 default:
510 return -EINVAL;
511 }
512 }
513
514 static int packed_width_bytes(u32 format, short width)
515 {
516 switch (format & I915_OVERLAY_DEPTH_MASK) {
517 case I915_OVERLAY_YUV422:
518 return width << 1;
519 default:
520 return -EINVAL;
521 }
522 }
523
524 static int uv_hsubsampling(u32 format)
525 {
526 switch (format & I915_OVERLAY_DEPTH_MASK) {
527 case I915_OVERLAY_YUV422:
528 case I915_OVERLAY_YUV420:
529 return 2;
530 case I915_OVERLAY_YUV411:
531 case I915_OVERLAY_YUV410:
532 return 4;
533 default:
534 return -EINVAL;
535 }
536 }
537
538 static int uv_vsubsampling(u32 format)
539 {
540 switch (format & I915_OVERLAY_DEPTH_MASK) {
541 case I915_OVERLAY_YUV420:
542 case I915_OVERLAY_YUV410:
543 return 2;
544 case I915_OVERLAY_YUV422:
545 case I915_OVERLAY_YUV411:
546 return 1;
547 default:
548 return -EINVAL;
549 }
550 }
551
552 static u32 calc_swidthsw(struct drm_device *dev, u32 offset, u32 width)
553 {
554 u32 mask, shift, ret;
555 if (IS_GEN2(dev)) {
556 mask = 0x1f;
557 shift = 5;
558 } else {
559 mask = 0x3f;
560 shift = 6;
561 }
562 ret = ((offset + width + mask) >> shift) - (offset >> shift);
563 if (!IS_GEN2(dev))
564 ret <<= 1;
565 ret -=1;
566 return ret << 2;
567 }
568
569 static const u16 y_static_hcoeffs[N_HORIZ_Y_TAPS * N_PHASES] = {
570 0x3000, 0xb4a0, 0x1930, 0x1920, 0xb4a0,
571 0x3000, 0xb500, 0x19d0, 0x1880, 0xb440,
572 0x3000, 0xb540, 0x1a88, 0x2f80, 0xb3e0,
573 0x3000, 0xb580, 0x1b30, 0x2e20, 0xb380,
574 0x3000, 0xb5c0, 0x1bd8, 0x2cc0, 0xb320,
575 0x3020, 0xb5e0, 0x1c60, 0x2b80, 0xb2c0,
576 0x3020, 0xb5e0, 0x1cf8, 0x2a20, 0xb260,
577 0x3020, 0xb5e0, 0x1d80, 0x28e0, 0xb200,
578 0x3020, 0xb5c0, 0x1e08, 0x3f40, 0xb1c0,
579 0x3020, 0xb580, 0x1e78, 0x3ce0, 0xb160,
580 0x3040, 0xb520, 0x1ed8, 0x3aa0, 0xb120,
581 0x3040, 0xb4a0, 0x1f30, 0x3880, 0xb0e0,
582 0x3040, 0xb400, 0x1f78, 0x3680, 0xb0a0,
583 0x3020, 0xb340, 0x1fb8, 0x34a0, 0xb060,
584 0x3020, 0xb240, 0x1fe0, 0x32e0, 0xb040,
585 0x3020, 0xb140, 0x1ff8, 0x3160, 0xb020,
586 0xb000, 0x3000, 0x0800, 0x3000, 0xb000
587 };
588
589 static const u16 uv_static_hcoeffs[N_HORIZ_UV_TAPS * N_PHASES] = {
590 0x3000, 0x1800, 0x1800, 0xb000, 0x18d0, 0x2e60,
591 0xb000, 0x1990, 0x2ce0, 0xb020, 0x1a68, 0x2b40,
592 0xb040, 0x1b20, 0x29e0, 0xb060, 0x1bd8, 0x2880,
593 0xb080, 0x1c88, 0x3e60, 0xb0a0, 0x1d28, 0x3c00,
594 0xb0c0, 0x1db8, 0x39e0, 0xb0e0, 0x1e40, 0x37e0,
595 0xb100, 0x1eb8, 0x3620, 0xb100, 0x1f18, 0x34a0,
596 0xb100, 0x1f68, 0x3360, 0xb0e0, 0x1fa8, 0x3240,
597 0xb0c0, 0x1fe0, 0x3140, 0xb060, 0x1ff0, 0x30a0,
598 0x3000, 0x0800, 0x3000
599 };
600
601 static void update_polyphase_filter(struct overlay_registers *regs)
602 {
603 memcpy(regs->Y_HCOEFS, y_static_hcoeffs, sizeof(y_static_hcoeffs));
604 memcpy(regs->UV_HCOEFS, uv_static_hcoeffs, sizeof(uv_static_hcoeffs));
605 }
606
607 static bool update_scaling_factors(struct intel_overlay *overlay,
608 struct overlay_registers *regs,
609 struct put_image_params *params)
610 {
611 /* fixed point with a 12 bit shift */
612 u32 xscale, yscale, xscale_UV, yscale_UV;
613 #define FP_SHIFT 12
614 #define FRACT_MASK 0xfff
615 bool scale_changed = false;
616 int uv_hscale = uv_hsubsampling(params->format);
617 int uv_vscale = uv_vsubsampling(params->format);
618
619 if (params->dst_w > 1)
620 xscale = ((params->src_scan_w - 1) << FP_SHIFT)
621 /(params->dst_w);
622 else
623 xscale = 1 << FP_SHIFT;
624
625 if (params->dst_h > 1)
626 yscale = ((params->src_scan_h - 1) << FP_SHIFT)
627 /(params->dst_h);
628 else
629 yscale = 1 << FP_SHIFT;
630
631 /*if (params->format & I915_OVERLAY_YUV_PLANAR) {*/
632 xscale_UV = xscale/uv_hscale;
633 yscale_UV = yscale/uv_vscale;
634 /* make the Y scale to UV scale ratio an exact multiply */
635 xscale = xscale_UV * uv_hscale;
636 yscale = yscale_UV * uv_vscale;
637 /*} else {
638 xscale_UV = 0;
639 yscale_UV = 0;
640 }*/
641
642 if (xscale != overlay->old_xscale || yscale != overlay->old_yscale)
643 scale_changed = true;
644 overlay->old_xscale = xscale;
645 overlay->old_yscale = yscale;
646
647 regs->YRGBSCALE = (((yscale & FRACT_MASK) << 20) |
648 ((xscale >> FP_SHIFT) << 16) |
649 ((xscale & FRACT_MASK) << 3));
650
651 regs->UVSCALE = (((yscale_UV & FRACT_MASK) << 20) |
652 ((xscale_UV >> FP_SHIFT) << 16) |
653 ((xscale_UV & FRACT_MASK) << 3));
654
655 regs->UVSCALEV = ((((yscale >> FP_SHIFT) << 16) |
656 ((yscale_UV >> FP_SHIFT) << 0)));
657
658 if (scale_changed)
659 update_polyphase_filter(regs);
660
661 return scale_changed;
662 }
663
664 static void update_colorkey(struct intel_overlay *overlay,
665 struct overlay_registers *regs)
666 {
667 u32 key = overlay->color_key;
668
669 switch (overlay->crtc->base.fb->bits_per_pixel) {
670 case 8:
671 regs->DCLRKV = 0;
672 regs->DCLRKM = CLK_RGB8I_MASK | DST_KEY_ENABLE;
673 break;
674
675 case 16:
676 if (overlay->crtc->base.fb->depth == 15) {
677 regs->DCLRKV = RGB15_TO_COLORKEY(key);
678 regs->DCLRKM = CLK_RGB15_MASK | DST_KEY_ENABLE;
679 } else {
680 regs->DCLRKV = RGB16_TO_COLORKEY(key);
681 regs->DCLRKM = CLK_RGB16_MASK | DST_KEY_ENABLE;
682 }
683 break;
684
685 case 24:
686 case 32:
687 regs->DCLRKV = key;
688 regs->DCLRKM = CLK_RGB24_MASK | DST_KEY_ENABLE;
689 break;
690 }
691 }
692
693 static u32 overlay_cmd_reg(struct put_image_params *params)
694 {
695 u32 cmd = OCMD_ENABLE | OCMD_BUF_TYPE_FRAME | OCMD_BUFFER0;
696
697 if (params->format & I915_OVERLAY_YUV_PLANAR) {
698 switch (params->format & I915_OVERLAY_DEPTH_MASK) {
699 case I915_OVERLAY_YUV422:
700 cmd |= OCMD_YUV_422_PLANAR;
701 break;
702 case I915_OVERLAY_YUV420:
703 cmd |= OCMD_YUV_420_PLANAR;
704 break;
705 case I915_OVERLAY_YUV411:
706 case I915_OVERLAY_YUV410:
707 cmd |= OCMD_YUV_410_PLANAR;
708 break;
709 }
710 } else { /* YUV packed */
711 switch (params->format & I915_OVERLAY_DEPTH_MASK) {
712 case I915_OVERLAY_YUV422:
713 cmd |= OCMD_YUV_422_PACKED;
714 break;
715 case I915_OVERLAY_YUV411:
716 cmd |= OCMD_YUV_411_PACKED;
717 break;
718 }
719
720 switch (params->format & I915_OVERLAY_SWAP_MASK) {
721 case I915_OVERLAY_NO_SWAP:
722 break;
723 case I915_OVERLAY_UV_SWAP:
724 cmd |= OCMD_UV_SWAP;
725 break;
726 case I915_OVERLAY_Y_SWAP:
727 cmd |= OCMD_Y_SWAP;
728 break;
729 case I915_OVERLAY_Y_AND_UV_SWAP:
730 cmd |= OCMD_Y_AND_UV_SWAP;
731 break;
732 }
733 }
734
735 return cmd;
736 }
737
738 static int intel_overlay_do_put_image(struct intel_overlay *overlay,
739 struct drm_gem_object *new_bo,
740 struct put_image_params *params)
741 {
742 int ret, tmp_width;
743 struct overlay_registers *regs;
744 bool scale_changed = false;
745 struct drm_i915_gem_object *bo_priv = to_intel_bo(new_bo);
746 struct drm_device *dev = overlay->dev;
747
748 BUG_ON(!mutex_is_locked(&dev->struct_mutex));
749 BUG_ON(!mutex_is_locked(&dev->mode_config.mutex));
750 BUG_ON(!overlay);
751
752 ret = intel_overlay_release_old_vid(overlay);
753 if (ret != 0)
754 return ret;
755
756 ret = i915_gem_object_pin(new_bo, PAGE_SIZE);
757 if (ret != 0)
758 return ret;
759
760 ret = i915_gem_object_set_to_gtt_domain(new_bo, 0);
761 if (ret != 0)
762 goto out_unpin;
763
764 if (!overlay->active) {
765 regs = intel_overlay_map_regs(overlay);
766 if (!regs) {
767 ret = -ENOMEM;
768 goto out_unpin;
769 }
770 regs->OCONFIG = OCONF_CC_OUT_8BIT;
771 if (IS_GEN4(overlay->dev))
772 regs->OCONFIG |= OCONF_CSC_MODE_BT709;
773 regs->OCONFIG |= overlay->crtc->pipe == 0 ?
774 OCONF_PIPE_A : OCONF_PIPE_B;
775 intel_overlay_unmap_regs(overlay, regs);
776
777 ret = intel_overlay_on(overlay);
778 if (ret != 0)
779 goto out_unpin;
780 }
781
782 regs = intel_overlay_map_regs(overlay);
783 if (!regs) {
784 ret = -ENOMEM;
785 goto out_unpin;
786 }
787
788 regs->DWINPOS = (params->dst_y << 16) | params->dst_x;
789 regs->DWINSZ = (params->dst_h << 16) | params->dst_w;
790
791 if (params->format & I915_OVERLAY_YUV_PACKED)
792 tmp_width = packed_width_bytes(params->format, params->src_w);
793 else
794 tmp_width = params->src_w;
795
796 regs->SWIDTH = params->src_w;
797 regs->SWIDTHSW = calc_swidthsw(overlay->dev,
798 params->offset_Y, tmp_width);
799 regs->SHEIGHT = params->src_h;
800 regs->OBUF_0Y = bo_priv->gtt_offset + params-> offset_Y;
801 regs->OSTRIDE = params->stride_Y;
802
803 if (params->format & I915_OVERLAY_YUV_PLANAR) {
804 int uv_hscale = uv_hsubsampling(params->format);
805 int uv_vscale = uv_vsubsampling(params->format);
806 u32 tmp_U, tmp_V;
807 regs->SWIDTH |= (params->src_w/uv_hscale) << 16;
808 tmp_U = calc_swidthsw(overlay->dev, params->offset_U,
809 params->src_w/uv_hscale);
810 tmp_V = calc_swidthsw(overlay->dev, params->offset_V,
811 params->src_w/uv_hscale);
812 regs->SWIDTHSW |= max_t(u32, tmp_U, tmp_V) << 16;
813 regs->SHEIGHT |= (params->src_h/uv_vscale) << 16;
814 regs->OBUF_0U = bo_priv->gtt_offset + params->offset_U;
815 regs->OBUF_0V = bo_priv->gtt_offset + params->offset_V;
816 regs->OSTRIDE |= params->stride_UV << 16;
817 }
818
819 scale_changed = update_scaling_factors(overlay, regs, params);
820
821 update_colorkey(overlay, regs);
822
823 regs->OCMD = overlay_cmd_reg(params);
824
825 intel_overlay_unmap_regs(overlay, regs);
826
827 ret = intel_overlay_continue(overlay, scale_changed);
828 if (ret)
829 goto out_unpin;
830
831 overlay->old_vid_bo = overlay->vid_bo;
832 overlay->vid_bo = to_intel_bo(new_bo);
833
834 return 0;
835
836 out_unpin:
837 i915_gem_object_unpin(new_bo);
838 return ret;
839 }
840
841 int intel_overlay_switch_off(struct intel_overlay *overlay,
842 bool interruptible)
843 {
844 struct overlay_registers *regs;
845 struct drm_device *dev = overlay->dev;
846 int ret;
847
848 BUG_ON(!mutex_is_locked(&dev->struct_mutex));
849 BUG_ON(!mutex_is_locked(&dev->mode_config.mutex));
850
851 ret = intel_overlay_recover_from_interrupt(overlay, interruptible);
852 if (ret != 0)
853 return ret;
854
855 if (!overlay->active)
856 return 0;
857
858 ret = intel_overlay_release_old_vid(overlay);
859 if (ret != 0)
860 return ret;
861
862 regs = intel_overlay_map_regs(overlay);
863 regs->OCMD = 0;
864 intel_overlay_unmap_regs(overlay, regs);
865
866 ret = intel_overlay_off(overlay, interruptible);
867 if (ret != 0)
868 return ret;
869
870 intel_overlay_off_tail(overlay);
871 return 0;
872 }
873
874 static int check_overlay_possible_on_crtc(struct intel_overlay *overlay,
875 struct intel_crtc *crtc)
876 {
877 drm_i915_private_t *dev_priv = overlay->dev->dev_private;
878
879 if (!crtc->active)
880 return -EINVAL;
881
882 /* can't use the overlay with double wide pipe */
883 if (INTEL_INFO(overlay->dev)->gen < 4 &&
884 (I915_READ(PIPECONF(crtc->pipe)) & (PIPECONF_DOUBLE_WIDE | PIPECONF_ENABLE)) != PIPECONF_ENABLE)
885 return -EINVAL;
886
887 return 0;
888 }
889
890 static void update_pfit_vscale_ratio(struct intel_overlay *overlay)
891 {
892 struct drm_device *dev = overlay->dev;
893 drm_i915_private_t *dev_priv = dev->dev_private;
894 u32 pfit_control = I915_READ(PFIT_CONTROL);
895 u32 ratio;
896
897 /* XXX: This is not the same logic as in the xorg driver, but more in
898 * line with the intel documentation for the i965
899 */
900 if (INTEL_INFO(dev)->gen >= 4) {
901 /* on i965 use the PGM reg to read out the autoscaler values */
902 ratio = I915_READ(PFIT_PGM_RATIOS) >> PFIT_VERT_SCALE_SHIFT_965;
903 } else {
904 if (pfit_control & VERT_AUTO_SCALE)
905 ratio = I915_READ(PFIT_AUTO_RATIOS);
906 else
907 ratio = I915_READ(PFIT_PGM_RATIOS);
908 ratio >>= PFIT_VERT_SCALE_SHIFT;
909 }
910
911 overlay->pfit_vscale_ratio = ratio;
912 }
913
914 static int check_overlay_dst(struct intel_overlay *overlay,
915 struct drm_intel_overlay_put_image *rec)
916 {
917 struct drm_display_mode *mode = &overlay->crtc->base.mode;
918
919 if (rec->dst_x < mode->crtc_hdisplay &&
920 rec->dst_x + rec->dst_width <= mode->crtc_hdisplay &&
921 rec->dst_y < mode->crtc_vdisplay &&
922 rec->dst_y + rec->dst_height <= mode->crtc_vdisplay)
923 return 0;
924 else
925 return -EINVAL;
926 }
927
928 static int check_overlay_scaling(struct put_image_params *rec)
929 {
930 u32 tmp;
931
932 /* downscaling limit is 8.0 */
933 tmp = ((rec->src_scan_h << 16) / rec->dst_h) >> 16;
934 if (tmp > 7)
935 return -EINVAL;
936 tmp = ((rec->src_scan_w << 16) / rec->dst_w) >> 16;
937 if (tmp > 7)
938 return -EINVAL;
939
940 return 0;
941 }
942
943 static int check_overlay_src(struct drm_device *dev,
944 struct drm_intel_overlay_put_image *rec,
945 struct drm_gem_object *new_bo)
946 {
947 int uv_hscale = uv_hsubsampling(rec->flags);
948 int uv_vscale = uv_vsubsampling(rec->flags);
949 u32 stride_mask;
950 int depth;
951 u32 tmp;
952
953 /* check src dimensions */
954 if (IS_845G(dev) || IS_I830(dev)) {
955 if (rec->src_height > IMAGE_MAX_HEIGHT_LEGACY ||
956 rec->src_width > IMAGE_MAX_WIDTH_LEGACY)
957 return -EINVAL;
958 } else {
959 if (rec->src_height > IMAGE_MAX_HEIGHT ||
960 rec->src_width > IMAGE_MAX_WIDTH)
961 return -EINVAL;
962 }
963
964 /* better safe than sorry, use 4 as the maximal subsampling ratio */
965 if (rec->src_height < N_VERT_Y_TAPS*4 ||
966 rec->src_width < N_HORIZ_Y_TAPS*4)
967 return -EINVAL;
968
969 /* check alignment constraints */
970 switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
971 case I915_OVERLAY_RGB:
972 /* not implemented */
973 return -EINVAL;
974
975 case I915_OVERLAY_YUV_PACKED:
976 if (uv_vscale != 1)
977 return -EINVAL;
978
979 depth = packed_depth_bytes(rec->flags);
980 if (depth < 0)
981 return depth;
982
983 /* ignore UV planes */
984 rec->stride_UV = 0;
985 rec->offset_U = 0;
986 rec->offset_V = 0;
987 /* check pixel alignment */
988 if (rec->offset_Y % depth)
989 return -EINVAL;
990 break;
991
992 case I915_OVERLAY_YUV_PLANAR:
993 if (uv_vscale < 0 || uv_hscale < 0)
994 return -EINVAL;
995 /* no offset restrictions for planar formats */
996 break;
997
998 default:
999 return -EINVAL;
1000 }
1001
1002 if (rec->src_width % uv_hscale)
1003 return -EINVAL;
1004
1005 /* stride checking */
1006 if (IS_I830(dev) || IS_845G(dev))
1007 stride_mask = 255;
1008 else
1009 stride_mask = 63;
1010
1011 if (rec->stride_Y & stride_mask || rec->stride_UV & stride_mask)
1012 return -EINVAL;
1013 if (IS_GEN4(dev) && rec->stride_Y < 512)
1014 return -EINVAL;
1015
1016 tmp = (rec->flags & I915_OVERLAY_TYPE_MASK) == I915_OVERLAY_YUV_PLANAR ?
1017 4096 : 8192;
1018 if (rec->stride_Y > tmp || rec->stride_UV > 2*1024)
1019 return -EINVAL;
1020
1021 /* check buffer dimensions */
1022 switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
1023 case I915_OVERLAY_RGB:
1024 case I915_OVERLAY_YUV_PACKED:
1025 /* always 4 Y values per depth pixels */
1026 if (packed_width_bytes(rec->flags, rec->src_width) > rec->stride_Y)
1027 return -EINVAL;
1028
1029 tmp = rec->stride_Y*rec->src_height;
1030 if (rec->offset_Y + tmp > new_bo->size)
1031 return -EINVAL;
1032 break;
1033
1034 case I915_OVERLAY_YUV_PLANAR:
1035 if (rec->src_width > rec->stride_Y)
1036 return -EINVAL;
1037 if (rec->src_width/uv_hscale > rec->stride_UV)
1038 return -EINVAL;
1039
1040 tmp = rec->stride_Y * rec->src_height;
1041 if (rec->offset_Y + tmp > new_bo->size)
1042 return -EINVAL;
1043
1044 tmp = rec->stride_UV * (rec->src_height / uv_vscale);
1045 if (rec->offset_U + tmp > new_bo->size ||
1046 rec->offset_V + tmp > new_bo->size)
1047 return -EINVAL;
1048 break;
1049 }
1050
1051 return 0;
1052 }
1053
1054 /**
1055 * Return the pipe currently connected to the panel fitter,
1056 * or -1 if the panel fitter is not present or not in use
1057 */
1058 static int intel_panel_fitter_pipe(struct drm_device *dev)
1059 {
1060 struct drm_i915_private *dev_priv = dev->dev_private;
1061 u32 pfit_control;
1062
1063 /* i830 doesn't have a panel fitter */
1064 if (IS_I830(dev))
1065 return -1;
1066
1067 pfit_control = I915_READ(PFIT_CONTROL);
1068
1069 /* See if the panel fitter is in use */
1070 if ((pfit_control & PFIT_ENABLE) == 0)
1071 return -1;
1072
1073 /* 965 can place panel fitter on either pipe */
1074 if (IS_GEN4(dev))
1075 return (pfit_control >> 29) & 0x3;
1076
1077 /* older chips can only use pipe 1 */
1078 return 1;
1079 }
1080
1081 int intel_overlay_put_image(struct drm_device *dev, void *data,
1082 struct drm_file *file_priv)
1083 {
1084 struct drm_intel_overlay_put_image *put_image_rec = data;
1085 drm_i915_private_t *dev_priv = dev->dev_private;
1086 struct intel_overlay *overlay;
1087 struct drm_mode_object *drmmode_obj;
1088 struct intel_crtc *crtc;
1089 struct drm_gem_object *new_bo;
1090 struct put_image_params *params;
1091 int ret;
1092
1093 if (!dev_priv) {
1094 DRM_ERROR("called with no initialization\n");
1095 return -EINVAL;
1096 }
1097
1098 overlay = dev_priv->overlay;
1099 if (!overlay) {
1100 DRM_DEBUG("userspace bug: no overlay\n");
1101 return -ENODEV;
1102 }
1103
1104 if (!(put_image_rec->flags & I915_OVERLAY_ENABLE)) {
1105 mutex_lock(&dev->mode_config.mutex);
1106 mutex_lock(&dev->struct_mutex);
1107
1108 ret = intel_overlay_switch_off(overlay, true);
1109
1110 mutex_unlock(&dev->struct_mutex);
1111 mutex_unlock(&dev->mode_config.mutex);
1112
1113 return ret;
1114 }
1115
1116 params = kmalloc(sizeof(struct put_image_params), GFP_KERNEL);
1117 if (!params)
1118 return -ENOMEM;
1119
1120 drmmode_obj = drm_mode_object_find(dev, put_image_rec->crtc_id,
1121 DRM_MODE_OBJECT_CRTC);
1122 if (!drmmode_obj) {
1123 ret = -ENOENT;
1124 goto out_free;
1125 }
1126 crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
1127
1128 new_bo = drm_gem_object_lookup(dev, file_priv,
1129 put_image_rec->bo_handle);
1130 if (!new_bo) {
1131 ret = -ENOENT;
1132 goto out_free;
1133 }
1134
1135 mutex_lock(&dev->mode_config.mutex);
1136 mutex_lock(&dev->struct_mutex);
1137
1138 ret = intel_overlay_recover_from_interrupt(overlay, true);
1139 if (ret != 0)
1140 goto out_unlock;
1141
1142 if (overlay->crtc != crtc) {
1143 struct drm_display_mode *mode = &crtc->base.mode;
1144 ret = intel_overlay_switch_off(overlay, true);
1145 if (ret != 0)
1146 goto out_unlock;
1147
1148 ret = check_overlay_possible_on_crtc(overlay, crtc);
1149 if (ret != 0)
1150 goto out_unlock;
1151
1152 overlay->crtc = crtc;
1153 crtc->overlay = overlay;
1154
1155 /* line too wide, i.e. one-line-mode */
1156 if (mode->hdisplay > 1024 &&
1157 intel_panel_fitter_pipe(dev) == crtc->pipe) {
1158 overlay->pfit_active = 1;
1159 update_pfit_vscale_ratio(overlay);
1160 } else
1161 overlay->pfit_active = 0;
1162 }
1163
1164 ret = check_overlay_dst(overlay, put_image_rec);
1165 if (ret != 0)
1166 goto out_unlock;
1167
1168 if (overlay->pfit_active) {
1169 params->dst_y = ((((u32)put_image_rec->dst_y) << 12) /
1170 overlay->pfit_vscale_ratio);
1171 /* shifting right rounds downwards, so add 1 */
1172 params->dst_h = ((((u32)put_image_rec->dst_height) << 12) /
1173 overlay->pfit_vscale_ratio) + 1;
1174 } else {
1175 params->dst_y = put_image_rec->dst_y;
1176 params->dst_h = put_image_rec->dst_height;
1177 }
1178 params->dst_x = put_image_rec->dst_x;
1179 params->dst_w = put_image_rec->dst_width;
1180
1181 params->src_w = put_image_rec->src_width;
1182 params->src_h = put_image_rec->src_height;
1183 params->src_scan_w = put_image_rec->src_scan_width;
1184 params->src_scan_h = put_image_rec->src_scan_height;
1185 if (params->src_scan_h > params->src_h ||
1186 params->src_scan_w > params->src_w) {
1187 ret = -EINVAL;
1188 goto out_unlock;
1189 }
1190
1191 ret = check_overlay_src(dev, put_image_rec, new_bo);
1192 if (ret != 0)
1193 goto out_unlock;
1194 params->format = put_image_rec->flags & ~I915_OVERLAY_FLAGS_MASK;
1195 params->stride_Y = put_image_rec->stride_Y;
1196 params->stride_UV = put_image_rec->stride_UV;
1197 params->offset_Y = put_image_rec->offset_Y;
1198 params->offset_U = put_image_rec->offset_U;
1199 params->offset_V = put_image_rec->offset_V;
1200
1201 /* Check scaling after src size to prevent a divide-by-zero. */
1202 ret = check_overlay_scaling(params);
1203 if (ret != 0)
1204 goto out_unlock;
1205
1206 ret = intel_overlay_do_put_image(overlay, new_bo, params);
1207 if (ret != 0)
1208 goto out_unlock;
1209
1210 mutex_unlock(&dev->struct_mutex);
1211 mutex_unlock(&dev->mode_config.mutex);
1212
1213 kfree(params);
1214
1215 return 0;
1216
1217 out_unlock:
1218 mutex_unlock(&dev->struct_mutex);
1219 mutex_unlock(&dev->mode_config.mutex);
1220 drm_gem_object_unreference_unlocked(new_bo);
1221 out_free:
1222 kfree(params);
1223
1224 return ret;
1225 }
1226
1227 static void update_reg_attrs(struct intel_overlay *overlay,
1228 struct overlay_registers *regs)
1229 {
1230 regs->OCLRC0 = (overlay->contrast << 18) | (overlay->brightness & 0xff);
1231 regs->OCLRC1 = overlay->saturation;
1232 }
1233
1234 static bool check_gamma_bounds(u32 gamma1, u32 gamma2)
1235 {
1236 int i;
1237
1238 if (gamma1 & 0xff000000 || gamma2 & 0xff000000)
1239 return false;
1240
1241 for (i = 0; i < 3; i++) {
1242 if (((gamma1 >> i*8) & 0xff) >= ((gamma2 >> i*8) & 0xff))
1243 return false;
1244 }
1245
1246 return true;
1247 }
1248
1249 static bool check_gamma5_errata(u32 gamma5)
1250 {
1251 int i;
1252
1253 for (i = 0; i < 3; i++) {
1254 if (((gamma5 >> i*8) & 0xff) == 0x80)
1255 return false;
1256 }
1257
1258 return true;
1259 }
1260
1261 static int check_gamma(struct drm_intel_overlay_attrs *attrs)
1262 {
1263 if (!check_gamma_bounds(0, attrs->gamma0) ||
1264 !check_gamma_bounds(attrs->gamma0, attrs->gamma1) ||
1265 !check_gamma_bounds(attrs->gamma1, attrs->gamma2) ||
1266 !check_gamma_bounds(attrs->gamma2, attrs->gamma3) ||
1267 !check_gamma_bounds(attrs->gamma3, attrs->gamma4) ||
1268 !check_gamma_bounds(attrs->gamma4, attrs->gamma5) ||
1269 !check_gamma_bounds(attrs->gamma5, 0x00ffffff))
1270 return -EINVAL;
1271
1272 if (!check_gamma5_errata(attrs->gamma5))
1273 return -EINVAL;
1274
1275 return 0;
1276 }
1277
1278 int intel_overlay_attrs(struct drm_device *dev, void *data,
1279 struct drm_file *file_priv)
1280 {
1281 struct drm_intel_overlay_attrs *attrs = data;
1282 drm_i915_private_t *dev_priv = dev->dev_private;
1283 struct intel_overlay *overlay;
1284 struct overlay_registers *regs;
1285 int ret;
1286
1287 if (!dev_priv) {
1288 DRM_ERROR("called with no initialization\n");
1289 return -EINVAL;
1290 }
1291
1292 overlay = dev_priv->overlay;
1293 if (!overlay) {
1294 DRM_DEBUG("userspace bug: no overlay\n");
1295 return -ENODEV;
1296 }
1297
1298 mutex_lock(&dev->mode_config.mutex);
1299 mutex_lock(&dev->struct_mutex);
1300
1301 ret = -EINVAL;
1302 if (!(attrs->flags & I915_OVERLAY_UPDATE_ATTRS)) {
1303 attrs->color_key = overlay->color_key;
1304 attrs->brightness = overlay->brightness;
1305 attrs->contrast = overlay->contrast;
1306 attrs->saturation = overlay->saturation;
1307
1308 if (!IS_GEN2(dev)) {
1309 attrs->gamma0 = I915_READ(OGAMC0);
1310 attrs->gamma1 = I915_READ(OGAMC1);
1311 attrs->gamma2 = I915_READ(OGAMC2);
1312 attrs->gamma3 = I915_READ(OGAMC3);
1313 attrs->gamma4 = I915_READ(OGAMC4);
1314 attrs->gamma5 = I915_READ(OGAMC5);
1315 }
1316 } else {
1317 if (attrs->brightness < -128 || attrs->brightness > 127)
1318 goto out_unlock;
1319 if (attrs->contrast > 255)
1320 goto out_unlock;
1321 if (attrs->saturation > 1023)
1322 goto out_unlock;
1323
1324 overlay->color_key = attrs->color_key;
1325 overlay->brightness = attrs->brightness;
1326 overlay->contrast = attrs->contrast;
1327 overlay->saturation = attrs->saturation;
1328
1329 regs = intel_overlay_map_regs(overlay);
1330 if (!regs) {
1331 ret = -ENOMEM;
1332 goto out_unlock;
1333 }
1334
1335 update_reg_attrs(overlay, regs);
1336
1337 intel_overlay_unmap_regs(overlay, regs);
1338
1339 if (attrs->flags & I915_OVERLAY_UPDATE_GAMMA) {
1340 if (IS_GEN2(dev))
1341 goto out_unlock;
1342
1343 if (overlay->active) {
1344 ret = -EBUSY;
1345 goto out_unlock;
1346 }
1347
1348 ret = check_gamma(attrs);
1349 if (ret)
1350 goto out_unlock;
1351
1352 I915_WRITE(OGAMC0, attrs->gamma0);
1353 I915_WRITE(OGAMC1, attrs->gamma1);
1354 I915_WRITE(OGAMC2, attrs->gamma2);
1355 I915_WRITE(OGAMC3, attrs->gamma3);
1356 I915_WRITE(OGAMC4, attrs->gamma4);
1357 I915_WRITE(OGAMC5, attrs->gamma5);
1358 }
1359 }
1360
1361 ret = 0;
1362 out_unlock:
1363 mutex_unlock(&dev->struct_mutex);
1364 mutex_unlock(&dev->mode_config.mutex);
1365
1366 return ret;
1367 }
1368
1369 void intel_setup_overlay(struct drm_device *dev)
1370 {
1371 drm_i915_private_t *dev_priv = dev->dev_private;
1372 struct intel_overlay *overlay;
1373 struct drm_gem_object *reg_bo;
1374 struct overlay_registers *regs;
1375 int ret;
1376
1377 if (!HAS_OVERLAY(dev))
1378 return;
1379
1380 overlay = kzalloc(sizeof(struct intel_overlay), GFP_KERNEL);
1381 if (!overlay)
1382 return;
1383 overlay->dev = dev;
1384
1385 reg_bo = i915_gem_alloc_object(dev, PAGE_SIZE);
1386 if (!reg_bo)
1387 goto out_free;
1388 overlay->reg_bo = to_intel_bo(reg_bo);
1389
1390 if (OVERLAY_NEEDS_PHYSICAL(dev)) {
1391 ret = i915_gem_attach_phys_object(dev, reg_bo,
1392 I915_GEM_PHYS_OVERLAY_REGS,
1393 PAGE_SIZE);
1394 if (ret) {
1395 DRM_ERROR("failed to attach phys overlay regs\n");
1396 goto out_free_bo;
1397 }
1398 overlay->flip_addr = overlay->reg_bo->phys_obj->handle->busaddr;
1399 } else {
1400 ret = i915_gem_object_pin(reg_bo, PAGE_SIZE);
1401 if (ret) {
1402 DRM_ERROR("failed to pin overlay register bo\n");
1403 goto out_free_bo;
1404 }
1405 overlay->flip_addr = overlay->reg_bo->gtt_offset;
1406
1407 ret = i915_gem_object_set_to_gtt_domain(reg_bo, true);
1408 if (ret) {
1409 DRM_ERROR("failed to move overlay register bo into the GTT\n");
1410 goto out_unpin_bo;
1411 }
1412 }
1413
1414 /* init all values */
1415 overlay->color_key = 0x0101fe;
1416 overlay->brightness = -19;
1417 overlay->contrast = 75;
1418 overlay->saturation = 146;
1419
1420 regs = intel_overlay_map_regs(overlay);
1421 if (!regs)
1422 goto out_free_bo;
1423
1424 memset(regs, 0, sizeof(struct overlay_registers));
1425 update_polyphase_filter(regs);
1426 update_reg_attrs(overlay, regs);
1427
1428 intel_overlay_unmap_regs(overlay, regs);
1429
1430 dev_priv->overlay = overlay;
1431 DRM_INFO("initialized overlay support\n");
1432 return;
1433
1434 out_unpin_bo:
1435 i915_gem_object_unpin(reg_bo);
1436 out_free_bo:
1437 drm_gem_object_unreference(reg_bo);
1438 out_free:
1439 kfree(overlay);
1440 return;
1441 }
1442
1443 void intel_cleanup_overlay(struct drm_device *dev)
1444 {
1445 drm_i915_private_t *dev_priv = dev->dev_private;
1446
1447 if (!dev_priv->overlay)
1448 return;
1449
1450 /* The bo's should be free'd by the generic code already.
1451 * Furthermore modesetting teardown happens beforehand so the
1452 * hardware should be off already */
1453 BUG_ON(dev_priv->overlay->active);
1454
1455 drm_gem_object_unreference_unlocked(&dev_priv->overlay->reg_bo->base);
1456 kfree(dev_priv->overlay);
1457 }
1458
1459 #ifdef CONFIG_DEBUG_FS
1460 #include <linux/seq_file.h>
1461
1462 struct intel_overlay_error_state {
1463 struct overlay_registers regs;
1464 unsigned long base;
1465 u32 dovsta;
1466 u32 isr;
1467 };
1468
1469 static struct overlay_registers *
1470 intel_overlay_map_regs_atomic(struct intel_overlay *overlay)
1471 {
1472 drm_i915_private_t *dev_priv = overlay->dev->dev_private;
1473 struct overlay_registers *regs;
1474
1475 if (OVERLAY_NEEDS_PHYSICAL(overlay->dev))
1476 regs = overlay->reg_bo->phys_obj->handle->vaddr;
1477 else
1478 regs = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
1479 overlay->reg_bo->gtt_offset);
1480
1481 return regs;
1482 }
1483
1484 static void intel_overlay_unmap_regs_atomic(struct intel_overlay *overlay,
1485 struct overlay_registers *regs)
1486 {
1487 if (!OVERLAY_NEEDS_PHYSICAL(overlay->dev))
1488 io_mapping_unmap_atomic(regs);
1489 }
1490
1491
1492 struct intel_overlay_error_state *
1493 intel_overlay_capture_error_state(struct drm_device *dev)
1494 {
1495 drm_i915_private_t *dev_priv = dev->dev_private;
1496 struct intel_overlay *overlay = dev_priv->overlay;
1497 struct intel_overlay_error_state *error;
1498 struct overlay_registers __iomem *regs;
1499
1500 if (!overlay || !overlay->active)
1501 return NULL;
1502
1503 error = kmalloc(sizeof(*error), GFP_ATOMIC);
1504 if (error == NULL)
1505 return NULL;
1506
1507 error->dovsta = I915_READ(DOVSTA);
1508 error->isr = I915_READ(ISR);
1509 if (OVERLAY_NEEDS_PHYSICAL(overlay->dev))
1510 error->base = (long) overlay->reg_bo->phys_obj->handle->vaddr;
1511 else
1512 error->base = (long) overlay->reg_bo->gtt_offset;
1513
1514 regs = intel_overlay_map_regs_atomic(overlay);
1515 if (!regs)
1516 goto err;
1517
1518 memcpy_fromio(&error->regs, regs, sizeof(struct overlay_registers));
1519 intel_overlay_unmap_regs_atomic(overlay, regs);
1520
1521 return error;
1522
1523 err:
1524 kfree(error);
1525 return NULL;
1526 }
1527
1528 void
1529 intel_overlay_print_error_state(struct seq_file *m, struct intel_overlay_error_state *error)
1530 {
1531 seq_printf(m, "Overlay, status: 0x%08x, interrupt: 0x%08x\n",
1532 error->dovsta, error->isr);
1533 seq_printf(m, " Register file at 0x%08lx:\n",
1534 error->base);
1535
1536 #define P(x) seq_printf(m, " " #x ": 0x%08x\n", error->regs.x)
1537 P(OBUF_0Y);
1538 P(OBUF_1Y);
1539 P(OBUF_0U);
1540 P(OBUF_0V);
1541 P(OBUF_1U);
1542 P(OBUF_1V);
1543 P(OSTRIDE);
1544 P(YRGB_VPH);
1545 P(UV_VPH);
1546 P(HORZ_PH);
1547 P(INIT_PHS);
1548 P(DWINPOS);
1549 P(DWINSZ);
1550 P(SWIDTH);
1551 P(SWIDTHSW);
1552 P(SHEIGHT);
1553 P(YRGBSCALE);
1554 P(UVSCALE);
1555 P(OCLRC0);
1556 P(OCLRC1);
1557 P(DCLRKV);
1558 P(DCLRKM);
1559 P(SCLRKVH);
1560 P(SCLRKVL);
1561 P(SCLRKEN);
1562 P(OCONFIG);
1563 P(OCMD);
1564 P(OSTART_0Y);
1565 P(OSTART_1Y);
1566 P(OSTART_0U);
1567 P(OSTART_0V);
1568 P(OSTART_1U);
1569 P(OSTART_1V);
1570 P(OTILEOFF_0Y);
1571 P(OTILEOFF_1Y);
1572 P(OTILEOFF_0U);
1573 P(OTILEOFF_0V);
1574 P(OTILEOFF_1U);
1575 P(OTILEOFF_1V);
1576 P(FASTHSCALE);
1577 P(UVSCALEV);
1578 #undef P
1579 }
1580 #endif
CJK support for tty framebuffer vt