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>
28 #include <linux/slab.h>
32 #include "drm_crtc_helper.h"
33 #include "intel_drv.h"
37 static void intel_crt_dpms(struct drm_encoder
*encoder
, int mode
)
39 struct drm_device
*dev
= encoder
->dev
;
40 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
43 if (HAS_PCH_SPLIT(dev
))
48 temp
= I915_READ(reg
);
49 temp
&= ~(ADPA_HSYNC_CNTL_DISABLE
| ADPA_VSYNC_CNTL_DISABLE
);
50 temp
&= ~ADPA_DAC_ENABLE
;
53 case DRM_MODE_DPMS_ON
:
54 temp
|= ADPA_DAC_ENABLE
;
56 case DRM_MODE_DPMS_STANDBY
:
57 temp
|= ADPA_DAC_ENABLE
| ADPA_HSYNC_CNTL_DISABLE
;
59 case DRM_MODE_DPMS_SUSPEND
:
60 temp
|= ADPA_DAC_ENABLE
| ADPA_VSYNC_CNTL_DISABLE
;
62 case DRM_MODE_DPMS_OFF
:
63 temp
|= ADPA_HSYNC_CNTL_DISABLE
| ADPA_VSYNC_CNTL_DISABLE
;
67 I915_WRITE(reg
, temp
);
70 static int intel_crt_mode_valid(struct drm_connector
*connector
,
71 struct drm_display_mode
*mode
)
73 struct drm_device
*dev
= connector
->dev
;
76 if (mode
->flags
& DRM_MODE_FLAG_DBLSCAN
)
77 return MODE_NO_DBLESCAN
;
79 if (mode
->clock
< 25000)
80 return MODE_CLOCK_LOW
;
86 if (mode
->clock
> max_clock
)
87 return MODE_CLOCK_HIGH
;
92 static bool intel_crt_mode_fixup(struct drm_encoder
*encoder
,
93 struct drm_display_mode
*mode
,
94 struct drm_display_mode
*adjusted_mode
)
99 static void intel_crt_mode_set(struct drm_encoder
*encoder
,
100 struct drm_display_mode
*mode
,
101 struct drm_display_mode
*adjusted_mode
)
104 struct drm_device
*dev
= encoder
->dev
;
105 struct drm_crtc
*crtc
= encoder
->crtc
;
106 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
107 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
112 if (intel_crtc
->pipe
== 0)
113 dpll_md_reg
= DPLL_A_MD
;
115 dpll_md_reg
= DPLL_B_MD
;
117 if (HAS_PCH_SPLIT(dev
))
123 * Disable separate mode multiplier used when cloning SDVO to CRT
124 * XXX this needs to be adjusted when we really are cloning
126 if (INTEL_INFO(dev
)->gen
>= 4 && !HAS_PCH_SPLIT(dev
)) {
127 dpll_md
= I915_READ(dpll_md_reg
);
128 I915_WRITE(dpll_md_reg
,
129 dpll_md
& ~DPLL_MD_UDI_MULTIPLIER_MASK
);
133 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PHSYNC
)
134 adpa
|= ADPA_HSYNC_ACTIVE_HIGH
;
135 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PVSYNC
)
136 adpa
|= ADPA_VSYNC_ACTIVE_HIGH
;
138 if (intel_crtc
->pipe
== 0) {
139 if (HAS_PCH_CPT(dev
))
140 adpa
|= PORT_TRANS_A_SEL_CPT
;
142 adpa
|= ADPA_PIPE_A_SELECT
;
143 if (!HAS_PCH_SPLIT(dev
))
144 I915_WRITE(BCLRPAT_A
, 0);
146 if (HAS_PCH_CPT(dev
))
147 adpa
|= PORT_TRANS_B_SEL_CPT
;
149 adpa
|= ADPA_PIPE_B_SELECT
;
150 if (!HAS_PCH_SPLIT(dev
))
151 I915_WRITE(BCLRPAT_B
, 0);
154 I915_WRITE(adpa_reg
, adpa
);
157 static bool intel_ironlake_crt_detect_hotplug(struct drm_connector
*connector
)
159 struct drm_device
*dev
= connector
->dev
;
160 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
163 bool turn_off_dac
= false;
165 temp
= adpa
= I915_READ(PCH_ADPA
);
167 if (HAS_PCH_SPLIT(dev
))
170 adpa
&= ~ADPA_CRT_HOTPLUG_MASK
;
172 adpa
&= ~ADPA_DAC_ENABLE
;
174 /* disable HPD first */
175 I915_WRITE(PCH_ADPA
, adpa
);
176 (void)I915_READ(PCH_ADPA
);
178 adpa
|= (ADPA_CRT_HOTPLUG_PERIOD_128
|
179 ADPA_CRT_HOTPLUG_WARMUP_10MS
|
180 ADPA_CRT_HOTPLUG_SAMPLE_4S
|
181 ADPA_CRT_HOTPLUG_VOLTAGE_50
| /* default */
182 ADPA_CRT_HOTPLUG_VOLREF_325MV
|
183 ADPA_CRT_HOTPLUG_ENABLE
|
184 ADPA_CRT_HOTPLUG_FORCE_TRIGGER
);
186 DRM_DEBUG_KMS("pch crt adpa 0x%x", adpa
);
187 I915_WRITE(PCH_ADPA
, adpa
);
189 if (wait_for((I915_READ(PCH_ADPA
) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER
) == 0,
191 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
194 /* Make sure hotplug is enabled */
195 I915_WRITE(PCH_ADPA
, temp
| ADPA_CRT_HOTPLUG_ENABLE
);
196 (void)I915_READ(PCH_ADPA
);
199 /* Check the status to see if both blue and green are on now */
200 adpa
= I915_READ(PCH_ADPA
);
201 adpa
&= ADPA_CRT_HOTPLUG_MONITOR_MASK
;
202 if ((adpa
== ADPA_CRT_HOTPLUG_MONITOR_COLOR
) ||
203 (adpa
== ADPA_CRT_HOTPLUG_MONITOR_MONO
))
212 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
214 * Not for i915G/i915GM
216 * \return true if CRT is connected.
217 * \return false if CRT is disconnected.
219 static bool intel_crt_detect_hotplug(struct drm_connector
*connector
)
221 struct drm_device
*dev
= connector
->dev
;
222 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
223 u32 hotplug_en
, orig
, stat
;
227 if (HAS_PCH_SPLIT(dev
))
228 return intel_ironlake_crt_detect_hotplug(connector
);
231 * On 4 series desktop, CRT detect sequence need to be done twice
232 * to get a reliable result.
235 if (IS_G4X(dev
) && !IS_GM45(dev
))
239 hotplug_en
= orig
= I915_READ(PORT_HOTPLUG_EN
);
240 hotplug_en
|= CRT_HOTPLUG_FORCE_DETECT
;
242 for (i
= 0; i
< tries
; i
++) {
243 /* turn on the FORCE_DETECT */
244 I915_WRITE(PORT_HOTPLUG_EN
, hotplug_en
);
245 /* wait for FORCE_DETECT to go off */
246 if (wait_for((I915_READ(PORT_HOTPLUG_EN
) &
247 CRT_HOTPLUG_FORCE_DETECT
) == 0,
249 DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off");
252 stat
= I915_READ(PORT_HOTPLUG_STAT
);
253 if ((stat
& CRT_HOTPLUG_MONITOR_MASK
) != CRT_HOTPLUG_MONITOR_NONE
)
256 /* clear the interrupt we just generated, if any */
257 I915_WRITE(PORT_HOTPLUG_STAT
, CRT_HOTPLUG_INT_STATUS
);
259 /* and put the bits back */
260 I915_WRITE(PORT_HOTPLUG_EN
, orig
);
265 static bool intel_crt_ddc_probe(struct drm_i915_private
*dev_priv
, int ddc_bus
)
268 struct i2c_msg msgs
[] = {
276 /* DDC monitor detect: Does it ACK a write to 0xA0? */
277 return i2c_transfer(&dev_priv
->gmbus
[ddc_bus
].adapter
, msgs
, 1) == 1;
280 static bool intel_crt_detect_ddc(struct drm_encoder
*encoder
)
282 struct intel_encoder
*intel_encoder
= to_intel_encoder(encoder
);
283 struct drm_i915_private
*dev_priv
= encoder
->dev
->dev_private
;
285 /* CRT should always be at 0, but check anyway */
286 if (intel_encoder
->type
!= INTEL_OUTPUT_ANALOG
)
289 if (intel_crt_ddc_probe(dev_priv
, dev_priv
->crt_ddc_pin
)) {
290 DRM_DEBUG_KMS("CRT detected via DDC:0xa0\n");
294 if (intel_ddc_probe(intel_encoder
, dev_priv
->crt_ddc_pin
)) {
295 DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n");
302 static enum drm_connector_status
303 intel_crt_load_detect(struct drm_crtc
*crtc
, struct intel_encoder
*intel_encoder
)
305 struct drm_encoder
*encoder
= &intel_encoder
->base
;
306 struct drm_device
*dev
= encoder
->dev
;
307 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
308 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
309 uint32_t pipe
= intel_crtc
->pipe
;
310 uint32_t save_bclrpat
;
311 uint32_t save_vtotal
;
312 uint32_t vtotal
, vactive
;
314 uint32_t vblank
, vblank_start
, vblank_end
;
316 uint32_t bclrpat_reg
;
320 uint32_t pipeconf_reg
;
321 uint32_t pipe_dsl_reg
;
323 enum drm_connector_status status
;
325 DRM_DEBUG_KMS("starting load-detect on CRT\n");
328 bclrpat_reg
= BCLRPAT_A
;
329 vtotal_reg
= VTOTAL_A
;
330 vblank_reg
= VBLANK_A
;
332 pipeconf_reg
= PIPEACONF
;
333 pipe_dsl_reg
= PIPEADSL
;
335 bclrpat_reg
= BCLRPAT_B
;
336 vtotal_reg
= VTOTAL_B
;
337 vblank_reg
= VBLANK_B
;
339 pipeconf_reg
= PIPEBCONF
;
340 pipe_dsl_reg
= PIPEBDSL
;
343 save_bclrpat
= I915_READ(bclrpat_reg
);
344 save_vtotal
= I915_READ(vtotal_reg
);
345 vblank
= I915_READ(vblank_reg
);
347 vtotal
= ((save_vtotal
>> 16) & 0xfff) + 1;
348 vactive
= (save_vtotal
& 0x7ff) + 1;
350 vblank_start
= (vblank
& 0xfff) + 1;
351 vblank_end
= ((vblank
>> 16) & 0xfff) + 1;
353 /* Set the border color to purple. */
354 I915_WRITE(bclrpat_reg
, 0x500050);
357 uint32_t pipeconf
= I915_READ(pipeconf_reg
);
358 I915_WRITE(pipeconf_reg
, pipeconf
| PIPECONF_FORCE_BORDER
);
359 POSTING_READ(pipeconf_reg
);
360 /* Wait for next Vblank to substitue
361 * border color for Color info */
362 intel_wait_for_vblank(dev
, pipe
);
363 st00
= I915_READ8(VGA_MSR_WRITE
);
364 status
= ((st00
& (1 << 4)) != 0) ?
365 connector_status_connected
:
366 connector_status_disconnected
;
368 I915_WRITE(pipeconf_reg
, pipeconf
);
370 bool restore_vblank
= false;
374 * If there isn't any border, add some.
375 * Yes, this will flicker
377 if (vblank_start
<= vactive
&& vblank_end
>= vtotal
) {
378 uint32_t vsync
= I915_READ(vsync_reg
);
379 uint32_t vsync_start
= (vsync
& 0xffff) + 1;
381 vblank_start
= vsync_start
;
382 I915_WRITE(vblank_reg
,
384 ((vblank_end
- 1) << 16));
385 restore_vblank
= true;
387 /* sample in the vertical border, selecting the larger one */
388 if (vblank_start
- vactive
>= vtotal
- vblank_end
)
389 vsample
= (vblank_start
+ vactive
) >> 1;
391 vsample
= (vtotal
+ vblank_end
) >> 1;
394 * Wait for the border to be displayed
396 while (I915_READ(pipe_dsl_reg
) >= vactive
)
398 while ((dsl
= I915_READ(pipe_dsl_reg
)) <= vsample
)
401 * Watch ST00 for an entire scanline
407 /* Read the ST00 VGA status register */
408 st00
= I915_READ8(VGA_MSR_WRITE
);
411 } while ((I915_READ(pipe_dsl_reg
) == dsl
));
413 /* restore vblank if necessary */
415 I915_WRITE(vblank_reg
, vblank
);
417 * If more than 3/4 of the scanline detected a monitor,
418 * then it is assumed to be present. This works even on i830,
419 * where there isn't any way to force the border color across
422 status
= detect
* 4 > count
* 3 ?
423 connector_status_connected
:
424 connector_status_disconnected
;
427 /* Restore previous settings */
428 I915_WRITE(bclrpat_reg
, save_bclrpat
);
433 static enum drm_connector_status
434 intel_crt_detect(struct drm_connector
*connector
, bool force
)
436 struct drm_device
*dev
= connector
->dev
;
437 struct intel_encoder
*encoder
= intel_attached_encoder(connector
);
438 struct drm_crtc
*crtc
;
440 enum drm_connector_status status
;
442 if (I915_HAS_HOTPLUG(dev
)) {
443 if (intel_crt_detect_hotplug(connector
)) {
444 DRM_DEBUG_KMS("CRT detected via hotplug\n");
445 return connector_status_connected
;
447 return connector_status_disconnected
;
450 if (intel_crt_detect_ddc(&encoder
->base
))
451 return connector_status_connected
;
454 return connector
->status
;
456 /* for pre-945g platforms use load detect */
457 if (encoder
->base
.crtc
&& encoder
->base
.crtc
->enabled
) {
458 status
= intel_crt_load_detect(encoder
->base
.crtc
, encoder
);
460 crtc
= intel_get_load_detect_pipe(encoder
, connector
,
463 if (intel_crt_detect_ddc(&encoder
->base
))
464 status
= connector_status_connected
;
466 status
= intel_crt_load_detect(crtc
, encoder
);
467 intel_release_load_detect_pipe(encoder
,
468 connector
, dpms_mode
);
470 status
= connector_status_unknown
;
476 static void intel_crt_destroy(struct drm_connector
*connector
)
478 drm_sysfs_connector_remove(connector
);
479 drm_connector_cleanup(connector
);
483 static int intel_crt_get_modes(struct drm_connector
*connector
)
485 struct drm_device
*dev
= connector
->dev
;
486 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
489 ret
= intel_ddc_get_modes(connector
,
490 &dev_priv
->gmbus
[dev_priv
->crt_ddc_pin
].adapter
);
491 if (ret
|| !IS_G4X(dev
))
494 /* Try to probe digital port for output in DVI-I -> VGA mode. */
495 return intel_ddc_get_modes(connector
,
496 &dev_priv
->gmbus
[GMBUS_PORT_DPB
].adapter
);
499 static int intel_crt_set_property(struct drm_connector
*connector
,
500 struct drm_property
*property
,
507 * Routines for controlling stuff on the analog port
510 static const struct drm_encoder_helper_funcs intel_crt_helper_funcs
= {
511 .dpms
= intel_crt_dpms
,
512 .mode_fixup
= intel_crt_mode_fixup
,
513 .prepare
= intel_encoder_prepare
,
514 .commit
= intel_encoder_commit
,
515 .mode_set
= intel_crt_mode_set
,
518 static const struct drm_connector_funcs intel_crt_connector_funcs
= {
519 .dpms
= drm_helper_connector_dpms
,
520 .detect
= intel_crt_detect
,
521 .fill_modes
= drm_helper_probe_single_connector_modes
,
522 .destroy
= intel_crt_destroy
,
523 .set_property
= intel_crt_set_property
,
526 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs
= {
527 .mode_valid
= intel_crt_mode_valid
,
528 .get_modes
= intel_crt_get_modes
,
529 .best_encoder
= intel_best_encoder
,
532 static const struct drm_encoder_funcs intel_crt_enc_funcs
= {
533 .destroy
= intel_encoder_destroy
,
536 void intel_crt_init(struct drm_device
*dev
)
538 struct drm_connector
*connector
;
539 struct intel_encoder
*intel_encoder
;
540 struct intel_connector
*intel_connector
;
541 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
543 intel_encoder
= kzalloc(sizeof(struct intel_encoder
), GFP_KERNEL
);
547 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
548 if (!intel_connector
) {
549 kfree(intel_encoder
);
553 connector
= &intel_connector
->base
;
554 drm_connector_init(dev
, &intel_connector
->base
,
555 &intel_crt_connector_funcs
, DRM_MODE_CONNECTOR_VGA
);
557 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_crt_enc_funcs
,
558 DRM_MODE_ENCODER_DAC
);
560 intel_connector_attach_encoder(intel_connector
, intel_encoder
);
562 intel_encoder
->type
= INTEL_OUTPUT_ANALOG
;
563 intel_encoder
->clone_mask
= (1 << INTEL_SDVO_NON_TV_CLONE_BIT
) |
564 (1 << INTEL_ANALOG_CLONE_BIT
) |
565 (1 << INTEL_SDVO_LVDS_CLONE_BIT
);
566 intel_encoder
->crtc_mask
= (1 << 0) | (1 << 1);
567 connector
->interlace_allowed
= 1;
568 connector
->doublescan_allowed
= 0;
570 drm_encoder_helper_add(&intel_encoder
->base
, &intel_crt_helper_funcs
);
571 drm_connector_helper_add(connector
, &intel_crt_connector_helper_funcs
);
573 drm_sysfs_connector_add(connector
);
575 if (I915_HAS_HOTPLUG(dev
))
576 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
578 connector
->polled
= DRM_CONNECTOR_POLL_CONNECT
;
580 dev_priv
->hotplug_supported_mask
|= CRT_HOTPLUG_INT_STATUS
;