2 * Copyright © 2006-2007 Intel Corporation
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:
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
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.
24 * Eric Anholt <eric@anholt.net>
27 #include <linux/i2c.h>
31 #include "drm_crtc_helper.h"
32 #include "intel_drv.h"
36 static void intel_crt_dpms(struct drm_encoder
*encoder
, int mode
)
38 struct drm_device
*dev
= encoder
->dev
;
39 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
47 temp
= I915_READ(reg
);
48 temp
&= ~(ADPA_HSYNC_CNTL_DISABLE
| ADPA_VSYNC_CNTL_DISABLE
);
49 temp
&= ~ADPA_DAC_ENABLE
;
52 case DRM_MODE_DPMS_ON
:
53 temp
|= ADPA_DAC_ENABLE
;
55 case DRM_MODE_DPMS_STANDBY
:
56 temp
|= ADPA_DAC_ENABLE
| ADPA_HSYNC_CNTL_DISABLE
;
58 case DRM_MODE_DPMS_SUSPEND
:
59 temp
|= ADPA_DAC_ENABLE
| ADPA_VSYNC_CNTL_DISABLE
;
61 case DRM_MODE_DPMS_OFF
:
62 temp
|= ADPA_HSYNC_CNTL_DISABLE
| ADPA_VSYNC_CNTL_DISABLE
;
66 I915_WRITE(reg
, temp
);
69 static int intel_crt_mode_valid(struct drm_connector
*connector
,
70 struct drm_display_mode
*mode
)
72 struct drm_device
*dev
= connector
->dev
;
75 if (mode
->flags
& DRM_MODE_FLAG_DBLSCAN
)
76 return MODE_NO_DBLESCAN
;
78 if (mode
->clock
< 25000)
79 return MODE_CLOCK_LOW
;
85 if (mode
->clock
> max_clock
)
86 return MODE_CLOCK_HIGH
;
91 static bool intel_crt_mode_fixup(struct drm_encoder
*encoder
,
92 struct drm_display_mode
*mode
,
93 struct drm_display_mode
*adjusted_mode
)
98 static void intel_crt_mode_set(struct drm_encoder
*encoder
,
99 struct drm_display_mode
*mode
,
100 struct drm_display_mode
*adjusted_mode
)
103 struct drm_device
*dev
= encoder
->dev
;
104 struct drm_crtc
*crtc
= encoder
->crtc
;
105 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
106 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
111 if (intel_crtc
->pipe
== 0)
112 dpll_md_reg
= DPLL_A_MD
;
114 dpll_md_reg
= DPLL_B_MD
;
122 * Disable separate mode multiplier used when cloning SDVO to CRT
123 * XXX this needs to be adjusted when we really are cloning
125 if (IS_I965G(dev
) && !IS_IGDNG(dev
)) {
126 dpll_md
= I915_READ(dpll_md_reg
);
127 I915_WRITE(dpll_md_reg
,
128 dpll_md
& ~DPLL_MD_UDI_MULTIPLIER_MASK
);
132 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PHSYNC
)
133 adpa
|= ADPA_HSYNC_ACTIVE_HIGH
;
134 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PVSYNC
)
135 adpa
|= ADPA_VSYNC_ACTIVE_HIGH
;
137 if (intel_crtc
->pipe
== 0) {
138 adpa
|= ADPA_PIPE_A_SELECT
;
140 I915_WRITE(BCLRPAT_A
, 0);
142 adpa
|= ADPA_PIPE_B_SELECT
;
144 I915_WRITE(BCLRPAT_B
, 0);
147 I915_WRITE(adpa_reg
, adpa
);
150 static bool intel_igdng_crt_detect_hotplug(struct drm_connector
*connector
)
152 struct drm_device
*dev
= connector
->dev
;
153 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
157 temp
= adpa
= I915_READ(PCH_ADPA
);
159 adpa
&= ~ADPA_CRT_HOTPLUG_MASK
;
161 adpa
|= (ADPA_CRT_HOTPLUG_PERIOD_128
|
162 ADPA_CRT_HOTPLUG_WARMUP_10MS
|
163 ADPA_CRT_HOTPLUG_SAMPLE_4S
|
164 ADPA_CRT_HOTPLUG_VOLTAGE_50
| /* default */
165 ADPA_CRT_HOTPLUG_VOLREF_325MV
|
166 ADPA_CRT_HOTPLUG_ENABLE
|
167 ADPA_CRT_HOTPLUG_FORCE_TRIGGER
);
169 DRM_DEBUG("pch crt adpa 0x%x", adpa
);
170 I915_WRITE(PCH_ADPA
, adpa
);
172 /* This might not be needed as not specified in spec...*/
175 /* Check the status to see if both blue and green are on now */
176 adpa
= I915_READ(PCH_ADPA
);
177 if ((adpa
& ADPA_CRT_HOTPLUG_MONITOR_MASK
) ==
178 ADPA_CRT_HOTPLUG_MONITOR_COLOR
)
183 /* restore origin register */
184 I915_WRITE(PCH_ADPA
, temp
);
189 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
191 * Not for i915G/i915GM
193 * \return true if CRT is connected.
194 * \return false if CRT is disconnected.
196 static bool intel_crt_detect_hotplug(struct drm_connector
*connector
)
198 struct drm_device
*dev
= connector
->dev
;
199 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
204 return intel_igdng_crt_detect_hotplug(connector
);
207 * On 4 series desktop, CRT detect sequence need to be done twice
208 * to get a reliable result.
211 if (IS_G4X(dev
) && !IS_GM45(dev
))
215 hotplug_en
= I915_READ(PORT_HOTPLUG_EN
);
216 hotplug_en
&= CRT_FORCE_HOTPLUG_MASK
;
217 hotplug_en
|= CRT_HOTPLUG_FORCE_DETECT
;
220 hotplug_en
|= CRT_HOTPLUG_ACTIVATION_PERIOD_64
;
222 hotplug_en
|= CRT_HOTPLUG_VOLTAGE_COMPARE_50
;
224 for (i
= 0; i
< tries
; i
++) {
225 unsigned long timeout
;
226 /* turn on the FORCE_DETECT */
227 I915_WRITE(PORT_HOTPLUG_EN
, hotplug_en
);
228 timeout
= jiffies
+ msecs_to_jiffies(1000);
229 /* wait for FORCE_DETECT to go off */
231 if (!(I915_READ(PORT_HOTPLUG_EN
) &
232 CRT_HOTPLUG_FORCE_DETECT
))
235 } while (time_after(timeout
, jiffies
));
238 if ((I915_READ(PORT_HOTPLUG_STAT
) & CRT_HOTPLUG_MONITOR_MASK
) ==
239 CRT_HOTPLUG_MONITOR_COLOR
)
245 static bool intel_crt_detect_ddc(struct drm_connector
*connector
)
247 struct intel_output
*intel_output
= to_intel_output(connector
);
249 /* CRT should always be at 0, but check anyway */
250 if (intel_output
->type
!= INTEL_OUTPUT_ANALOG
)
253 return intel_ddc_probe(intel_output
);
256 static enum drm_connector_status
257 intel_crt_load_detect(struct drm_crtc
*crtc
, struct intel_output
*intel_output
)
259 struct drm_encoder
*encoder
= &intel_output
->enc
;
260 struct drm_device
*dev
= encoder
->dev
;
261 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
262 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
263 uint32_t pipe
= intel_crtc
->pipe
;
264 uint32_t save_bclrpat
;
265 uint32_t save_vtotal
;
266 uint32_t vtotal
, vactive
;
268 uint32_t vblank
, vblank_start
, vblank_end
;
270 uint32_t bclrpat_reg
;
274 uint32_t pipeconf_reg
;
275 uint32_t pipe_dsl_reg
;
277 enum drm_connector_status status
;
280 bclrpat_reg
= BCLRPAT_A
;
281 vtotal_reg
= VTOTAL_A
;
282 vblank_reg
= VBLANK_A
;
284 pipeconf_reg
= PIPEACONF
;
285 pipe_dsl_reg
= PIPEADSL
;
287 bclrpat_reg
= BCLRPAT_B
;
288 vtotal_reg
= VTOTAL_B
;
289 vblank_reg
= VBLANK_B
;
291 pipeconf_reg
= PIPEBCONF
;
292 pipe_dsl_reg
= PIPEBDSL
;
295 save_bclrpat
= I915_READ(bclrpat_reg
);
296 save_vtotal
= I915_READ(vtotal_reg
);
297 vblank
= I915_READ(vblank_reg
);
299 vtotal
= ((save_vtotal
>> 16) & 0xfff) + 1;
300 vactive
= (save_vtotal
& 0x7ff) + 1;
302 vblank_start
= (vblank
& 0xfff) + 1;
303 vblank_end
= ((vblank
>> 16) & 0xfff) + 1;
305 /* Set the border color to purple. */
306 I915_WRITE(bclrpat_reg
, 0x500050);
309 uint32_t pipeconf
= I915_READ(pipeconf_reg
);
310 I915_WRITE(pipeconf_reg
, pipeconf
| PIPECONF_FORCE_BORDER
);
311 /* Wait for next Vblank to substitue
312 * border color for Color info */
313 intel_wait_for_vblank(dev
);
314 st00
= I915_READ8(VGA_MSR_WRITE
);
315 status
= ((st00
& (1 << 4)) != 0) ?
316 connector_status_connected
:
317 connector_status_disconnected
;
319 I915_WRITE(pipeconf_reg
, pipeconf
);
321 bool restore_vblank
= false;
325 * If there isn't any border, add some.
326 * Yes, this will flicker
328 if (vblank_start
<= vactive
&& vblank_end
>= vtotal
) {
329 uint32_t vsync
= I915_READ(vsync_reg
);
330 uint32_t vsync_start
= (vsync
& 0xffff) + 1;
332 vblank_start
= vsync_start
;
333 I915_WRITE(vblank_reg
,
335 ((vblank_end
- 1) << 16));
336 restore_vblank
= true;
338 /* sample in the vertical border, selecting the larger one */
339 if (vblank_start
- vactive
>= vtotal
- vblank_end
)
340 vsample
= (vblank_start
+ vactive
) >> 1;
342 vsample
= (vtotal
+ vblank_end
) >> 1;
345 * Wait for the border to be displayed
347 while (I915_READ(pipe_dsl_reg
) >= vactive
)
349 while ((dsl
= I915_READ(pipe_dsl_reg
)) <= vsample
)
352 * Watch ST00 for an entire scanline
358 /* Read the ST00 VGA status register */
359 st00
= I915_READ8(VGA_MSR_WRITE
);
362 } while ((I915_READ(pipe_dsl_reg
) == dsl
));
364 /* restore vblank if necessary */
366 I915_WRITE(vblank_reg
, vblank
);
368 * If more than 3/4 of the scanline detected a monitor,
369 * then it is assumed to be present. This works even on i830,
370 * where there isn't any way to force the border color across
373 status
= detect
* 4 > count
* 3 ?
374 connector_status_connected
:
375 connector_status_disconnected
;
378 /* Restore previous settings */
379 I915_WRITE(bclrpat_reg
, save_bclrpat
);
384 static enum drm_connector_status
intel_crt_detect(struct drm_connector
*connector
)
386 struct drm_device
*dev
= connector
->dev
;
387 struct intel_output
*intel_output
= to_intel_output(connector
);
388 struct drm_encoder
*encoder
= &intel_output
->enc
;
389 struct drm_crtc
*crtc
;
391 enum drm_connector_status status
;
393 if (IS_I9XX(dev
) && !IS_I915G(dev
) && !IS_I915GM(dev
)) {
394 if (intel_crt_detect_hotplug(connector
))
395 return connector_status_connected
;
397 return connector_status_disconnected
;
400 if (intel_crt_detect_ddc(connector
))
401 return connector_status_connected
;
403 /* for pre-945g platforms use load detect */
404 if (encoder
->crtc
&& encoder
->crtc
->enabled
) {
405 status
= intel_crt_load_detect(encoder
->crtc
, intel_output
);
407 crtc
= intel_get_load_detect_pipe(intel_output
,
410 status
= intel_crt_load_detect(crtc
, intel_output
);
411 intel_release_load_detect_pipe(intel_output
, dpms_mode
);
413 status
= connector_status_unknown
;
419 static void intel_crt_destroy(struct drm_connector
*connector
)
421 struct intel_output
*intel_output
= to_intel_output(connector
);
423 intel_i2c_destroy(intel_output
->ddc_bus
);
424 drm_sysfs_connector_remove(connector
);
425 drm_connector_cleanup(connector
);
429 static int intel_crt_get_modes(struct drm_connector
*connector
)
432 struct intel_output
*intel_output
= to_intel_output(connector
);
433 struct i2c_adapter
*ddcbus
;
434 struct drm_device
*dev
= connector
->dev
;
437 ret
= intel_ddc_get_modes(intel_output
);
438 if (ret
|| !IS_G4X(dev
))
441 ddcbus
= intel_output
->ddc_bus
;
442 /* Try to probe digital port for output in DVI-I -> VGA mode. */
443 intel_output
->ddc_bus
=
444 intel_i2c_create(connector
->dev
, GPIOD
, "CRTDDC_D");
446 if (!intel_output
->ddc_bus
) {
447 intel_output
->ddc_bus
= ddcbus
;
448 dev_printk(KERN_ERR
, &connector
->dev
->pdev
->dev
,
449 "DDC bus registration failed for CRTDDC_D.\n");
452 /* Try to get modes by GPIOD port */
453 ret
= intel_ddc_get_modes(intel_output
);
454 intel_i2c_destroy(ddcbus
);
461 static int intel_crt_set_property(struct drm_connector
*connector
,
462 struct drm_property
*property
,
469 * Routines for controlling stuff on the analog port
472 static const struct drm_encoder_helper_funcs intel_crt_helper_funcs
= {
473 .dpms
= intel_crt_dpms
,
474 .mode_fixup
= intel_crt_mode_fixup
,
475 .prepare
= intel_encoder_prepare
,
476 .commit
= intel_encoder_commit
,
477 .mode_set
= intel_crt_mode_set
,
480 static const struct drm_connector_funcs intel_crt_connector_funcs
= {
481 .dpms
= drm_helper_connector_dpms
,
482 .detect
= intel_crt_detect
,
483 .fill_modes
= drm_helper_probe_single_connector_modes
,
484 .destroy
= intel_crt_destroy
,
485 .set_property
= intel_crt_set_property
,
488 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs
= {
489 .mode_valid
= intel_crt_mode_valid
,
490 .get_modes
= intel_crt_get_modes
,
491 .best_encoder
= intel_best_encoder
,
494 static void intel_crt_enc_destroy(struct drm_encoder
*encoder
)
496 drm_encoder_cleanup(encoder
);
499 static const struct drm_encoder_funcs intel_crt_enc_funcs
= {
500 .destroy
= intel_crt_enc_destroy
,
503 void intel_crt_init(struct drm_device
*dev
)
505 struct drm_connector
*connector
;
506 struct intel_output
*intel_output
;
509 intel_output
= kzalloc(sizeof(struct intel_output
), GFP_KERNEL
);
513 connector
= &intel_output
->base
;
514 drm_connector_init(dev
, &intel_output
->base
,
515 &intel_crt_connector_funcs
, DRM_MODE_CONNECTOR_VGA
);
517 drm_encoder_init(dev
, &intel_output
->enc
, &intel_crt_enc_funcs
,
518 DRM_MODE_ENCODER_DAC
);
520 drm_mode_connector_attach_encoder(&intel_output
->base
,
523 /* Set up the DDC bus. */
528 intel_output
->ddc_bus
= intel_i2c_create(dev
, i2c_reg
, "CRTDDC_A");
529 if (!intel_output
->ddc_bus
) {
530 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
535 intel_output
->type
= INTEL_OUTPUT_ANALOG
;
536 connector
->interlace_allowed
= 0;
537 connector
->doublescan_allowed
= 0;
539 drm_encoder_helper_add(&intel_output
->enc
, &intel_crt_helper_funcs
);
540 drm_connector_helper_add(connector
, &intel_crt_connector_helper_funcs
);
542 drm_sysfs_connector_add(connector
);