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"
34 #include "intel_drv.h"
38 /* Here's the desired hotplug mode */
39 #define ADPA_HOTPLUG_BITS (ADPA_CRT_HOTPLUG_PERIOD_128 | \
40 ADPA_CRT_HOTPLUG_WARMUP_10MS | \
41 ADPA_CRT_HOTPLUG_SAMPLE_4S | \
42 ADPA_CRT_HOTPLUG_VOLTAGE_50 | \
43 ADPA_CRT_HOTPLUG_VOLREF_325MV | \
44 ADPA_CRT_HOTPLUG_ENABLE)
47 struct intel_encoder base
;
48 bool force_hotplug_required
;
51 static struct intel_crt
*intel_attached_crt(struct drm_connector
*connector
)
53 return container_of(intel_attached_encoder(connector
),
54 struct intel_crt
, base
);
57 static void intel_crt_dpms(struct drm_encoder
*encoder
, int mode
)
59 struct drm_device
*dev
= encoder
->dev
;
60 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
63 if (HAS_PCH_SPLIT(dev
))
68 temp
= I915_READ(reg
);
69 temp
&= ~(ADPA_HSYNC_CNTL_DISABLE
| ADPA_VSYNC_CNTL_DISABLE
);
70 temp
&= ~ADPA_DAC_ENABLE
;
73 case DRM_MODE_DPMS_ON
:
74 temp
|= ADPA_DAC_ENABLE
;
76 case DRM_MODE_DPMS_STANDBY
:
77 temp
|= ADPA_DAC_ENABLE
| ADPA_HSYNC_CNTL_DISABLE
;
79 case DRM_MODE_DPMS_SUSPEND
:
80 temp
|= ADPA_DAC_ENABLE
| ADPA_VSYNC_CNTL_DISABLE
;
82 case DRM_MODE_DPMS_OFF
:
83 temp
|= ADPA_HSYNC_CNTL_DISABLE
| ADPA_VSYNC_CNTL_DISABLE
;
87 I915_WRITE(reg
, temp
);
90 static int intel_crt_mode_valid(struct drm_connector
*connector
,
91 struct drm_display_mode
*mode
)
93 struct drm_device
*dev
= connector
->dev
;
96 if (mode
->flags
& DRM_MODE_FLAG_DBLSCAN
)
97 return MODE_NO_DBLESCAN
;
99 if (mode
->clock
< 25000)
100 return MODE_CLOCK_LOW
;
106 if (mode
->clock
> max_clock
)
107 return MODE_CLOCK_HIGH
;
112 static bool intel_crt_mode_fixup(struct drm_encoder
*encoder
,
113 struct drm_display_mode
*mode
,
114 struct drm_display_mode
*adjusted_mode
)
119 static void intel_crt_mode_set(struct drm_encoder
*encoder
,
120 struct drm_display_mode
*mode
,
121 struct drm_display_mode
*adjusted_mode
)
124 struct drm_device
*dev
= encoder
->dev
;
125 struct drm_crtc
*crtc
= encoder
->crtc
;
126 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
127 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
132 dpll_md_reg
= DPLL_MD(intel_crtc
->pipe
);
134 if (HAS_PCH_SPLIT(dev
))
140 * Disable separate mode multiplier used when cloning SDVO to CRT
141 * XXX this needs to be adjusted when we really are cloning
143 if (INTEL_INFO(dev
)->gen
>= 4 && !HAS_PCH_SPLIT(dev
)) {
144 dpll_md
= I915_READ(dpll_md_reg
);
145 I915_WRITE(dpll_md_reg
,
146 dpll_md
& ~DPLL_MD_UDI_MULTIPLIER_MASK
);
149 adpa
= ADPA_HOTPLUG_BITS
;
150 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PHSYNC
)
151 adpa
|= ADPA_HSYNC_ACTIVE_HIGH
;
152 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PVSYNC
)
153 adpa
|= ADPA_VSYNC_ACTIVE_HIGH
;
155 if (intel_crtc
->pipe
== 0) {
156 if (HAS_PCH_CPT(dev
))
157 adpa
|= PORT_TRANS_A_SEL_CPT
;
159 adpa
|= ADPA_PIPE_A_SELECT
;
161 if (HAS_PCH_CPT(dev
))
162 adpa
|= PORT_TRANS_B_SEL_CPT
;
164 adpa
|= ADPA_PIPE_B_SELECT
;
167 if (!HAS_PCH_SPLIT(dev
))
168 I915_WRITE(BCLRPAT(intel_crtc
->pipe
), 0);
170 I915_WRITE(adpa_reg
, adpa
);
173 static bool intel_ironlake_crt_detect_hotplug(struct drm_connector
*connector
)
175 struct drm_device
*dev
= connector
->dev
;
176 struct intel_crt
*crt
= intel_attached_crt(connector
);
177 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
181 /* The first time through, trigger an explicit detection cycle */
182 if (crt
->force_hotplug_required
) {
183 bool turn_off_dac
= HAS_PCH_SPLIT(dev
);
186 crt
->force_hotplug_required
= 0;
188 save_adpa
= adpa
= I915_READ(PCH_ADPA
);
189 DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa
);
191 adpa
|= ADPA_CRT_HOTPLUG_FORCE_TRIGGER
;
193 adpa
&= ~ADPA_DAC_ENABLE
;
195 I915_WRITE(PCH_ADPA
, adpa
);
197 if (wait_for((I915_READ(PCH_ADPA
) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER
) == 0,
199 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
202 I915_WRITE(PCH_ADPA
, save_adpa
);
203 POSTING_READ(PCH_ADPA
);
207 /* Check the status to see if both blue and green are on now */
208 adpa
= I915_READ(PCH_ADPA
);
209 if ((adpa
& ADPA_CRT_HOTPLUG_MONITOR_MASK
) != 0)
213 DRM_DEBUG_KMS("ironlake hotplug adpa=0x%x, result %d\n", adpa
, ret
);
219 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
221 * Not for i915G/i915GM
223 * \return true if CRT is connected.
224 * \return false if CRT is disconnected.
226 static bool intel_crt_detect_hotplug(struct drm_connector
*connector
)
228 struct drm_device
*dev
= connector
->dev
;
229 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
230 u32 hotplug_en
, orig
, stat
;
234 if (HAS_PCH_SPLIT(dev
))
235 return intel_ironlake_crt_detect_hotplug(connector
);
238 * On 4 series desktop, CRT detect sequence need to be done twice
239 * to get a reliable result.
242 if (IS_G4X(dev
) && !IS_GM45(dev
))
246 hotplug_en
= orig
= I915_READ(PORT_HOTPLUG_EN
);
247 hotplug_en
|= CRT_HOTPLUG_FORCE_DETECT
;
249 for (i
= 0; i
< tries
; i
++) {
250 /* turn on the FORCE_DETECT */
251 I915_WRITE(PORT_HOTPLUG_EN
, hotplug_en
);
252 /* wait for FORCE_DETECT to go off */
253 if (wait_for((I915_READ(PORT_HOTPLUG_EN
) &
254 CRT_HOTPLUG_FORCE_DETECT
) == 0,
256 DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off");
259 stat
= I915_READ(PORT_HOTPLUG_STAT
);
260 if ((stat
& CRT_HOTPLUG_MONITOR_MASK
) != CRT_HOTPLUG_MONITOR_NONE
)
263 /* clear the interrupt we just generated, if any */
264 I915_WRITE(PORT_HOTPLUG_STAT
, CRT_HOTPLUG_INT_STATUS
);
266 /* and put the bits back */
267 I915_WRITE(PORT_HOTPLUG_EN
, orig
);
272 static bool intel_crt_detect_ddc(struct drm_connector
*connector
)
274 struct intel_crt
*crt
= intel_attached_crt(connector
);
275 struct drm_i915_private
*dev_priv
= crt
->base
.base
.dev
->dev_private
;
277 /* CRT should always be at 0, but check anyway */
278 if (crt
->base
.type
!= INTEL_OUTPUT_ANALOG
)
281 if (intel_ddc_probe(&crt
->base
, dev_priv
->crt_ddc_pin
)) {
283 bool is_digital
= false;
285 edid
= drm_get_edid(connector
,
286 &dev_priv
->gmbus
[dev_priv
->crt_ddc_pin
].adapter
);
288 * This may be a DVI-I connector with a shared DDC
289 * link between analog and digital outputs, so we
290 * have to check the EDID input spec of the attached device.
293 is_digital
= edid
->input
& DRM_EDID_INPUT_DIGITAL
;
294 connector
->display_info
.raw_edid
= NULL
;
299 DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n");
307 static enum drm_connector_status
308 intel_crt_load_detect(struct drm_crtc
*crtc
, struct intel_crt
*crt
)
310 struct drm_encoder
*encoder
= &crt
->base
.base
;
311 struct drm_device
*dev
= encoder
->dev
;
312 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
313 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
314 uint32_t pipe
= intel_crtc
->pipe
;
315 uint32_t save_bclrpat
;
316 uint32_t save_vtotal
;
317 uint32_t vtotal
, vactive
;
319 uint32_t vblank
, vblank_start
, vblank_end
;
321 uint32_t bclrpat_reg
;
325 uint32_t pipeconf_reg
;
326 uint32_t pipe_dsl_reg
;
328 enum drm_connector_status status
;
330 DRM_DEBUG_KMS("starting load-detect on CRT\n");
332 bclrpat_reg
= BCLRPAT(pipe
);
333 vtotal_reg
= VTOTAL(pipe
);
334 vblank_reg
= VBLANK(pipe
);
335 vsync_reg
= VSYNC(pipe
);
336 pipeconf_reg
= PIPECONF(pipe
);
337 pipe_dsl_reg
= PIPEDSL(pipe
);
339 save_bclrpat
= I915_READ(bclrpat_reg
);
340 save_vtotal
= I915_READ(vtotal_reg
);
341 vblank
= I915_READ(vblank_reg
);
343 vtotal
= ((save_vtotal
>> 16) & 0xfff) + 1;
344 vactive
= (save_vtotal
& 0x7ff) + 1;
346 vblank_start
= (vblank
& 0xfff) + 1;
347 vblank_end
= ((vblank
>> 16) & 0xfff) + 1;
349 /* Set the border color to purple. */
350 I915_WRITE(bclrpat_reg
, 0x500050);
353 uint32_t pipeconf
= I915_READ(pipeconf_reg
);
354 I915_WRITE(pipeconf_reg
, pipeconf
| PIPECONF_FORCE_BORDER
);
355 POSTING_READ(pipeconf_reg
);
356 /* Wait for next Vblank to substitue
357 * border color for Color info */
358 intel_wait_for_vblank(dev
, pipe
);
359 st00
= I915_READ8(VGA_MSR_WRITE
);
360 status
= ((st00
& (1 << 4)) != 0) ?
361 connector_status_connected
:
362 connector_status_disconnected
;
364 I915_WRITE(pipeconf_reg
, pipeconf
);
366 bool restore_vblank
= false;
370 * If there isn't any border, add some.
371 * Yes, this will flicker
373 if (vblank_start
<= vactive
&& vblank_end
>= vtotal
) {
374 uint32_t vsync
= I915_READ(vsync_reg
);
375 uint32_t vsync_start
= (vsync
& 0xffff) + 1;
377 vblank_start
= vsync_start
;
378 I915_WRITE(vblank_reg
,
380 ((vblank_end
- 1) << 16));
381 restore_vblank
= true;
383 /* sample in the vertical border, selecting the larger one */
384 if (vblank_start
- vactive
>= vtotal
- vblank_end
)
385 vsample
= (vblank_start
+ vactive
) >> 1;
387 vsample
= (vtotal
+ vblank_end
) >> 1;
390 * Wait for the border to be displayed
392 while (I915_READ(pipe_dsl_reg
) >= vactive
)
394 while ((dsl
= I915_READ(pipe_dsl_reg
)) <= vsample
)
397 * Watch ST00 for an entire scanline
403 /* Read the ST00 VGA status register */
404 st00
= I915_READ8(VGA_MSR_WRITE
);
407 } while ((I915_READ(pipe_dsl_reg
) == dsl
));
409 /* restore vblank if necessary */
411 I915_WRITE(vblank_reg
, vblank
);
413 * If more than 3/4 of the scanline detected a monitor,
414 * then it is assumed to be present. This works even on i830,
415 * where there isn't any way to force the border color across
418 status
= detect
* 4 > count
* 3 ?
419 connector_status_connected
:
420 connector_status_disconnected
;
423 /* Restore previous settings */
424 I915_WRITE(bclrpat_reg
, save_bclrpat
);
429 static enum drm_connector_status
430 intel_crt_detect(struct drm_connector
*connector
, bool force
)
432 struct drm_device
*dev
= connector
->dev
;
433 struct intel_crt
*crt
= intel_attached_crt(connector
);
434 struct drm_crtc
*crtc
;
436 enum drm_connector_status status
;
438 if (I915_HAS_HOTPLUG(dev
)) {
439 if (intel_crt_detect_hotplug(connector
)) {
440 DRM_DEBUG_KMS("CRT detected via hotplug\n");
441 return connector_status_connected
;
443 DRM_DEBUG_KMS("CRT not detected via hotplug\n");
444 return connector_status_disconnected
;
448 if (intel_crt_detect_ddc(connector
))
449 return connector_status_connected
;
452 return connector
->status
;
454 /* for pre-945g platforms use load detect */
455 crtc
= crt
->base
.base
.crtc
;
456 if (crtc
&& crtc
->enabled
) {
457 status
= intel_crt_load_detect(crtc
, crt
);
459 crtc
= intel_get_load_detect_pipe(&crt
->base
, connector
,
462 if (intel_crt_detect_ddc(connector
))
463 status
= connector_status_connected
;
465 status
= intel_crt_load_detect(crtc
, crt
);
466 intel_release_load_detect_pipe(&crt
->base
,
467 connector
, dpms_mode
);
469 status
= connector_status_unknown
;
475 static void intel_crt_destroy(struct drm_connector
*connector
)
477 drm_sysfs_connector_remove(connector
);
478 drm_connector_cleanup(connector
);
482 static int intel_crt_get_modes(struct drm_connector
*connector
)
484 struct drm_device
*dev
= connector
->dev
;
485 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
488 ret
= intel_ddc_get_modes(connector
,
489 &dev_priv
->gmbus
[dev_priv
->crt_ddc_pin
].adapter
);
490 if (ret
|| !IS_G4X(dev
))
493 /* Try to probe digital port for output in DVI-I -> VGA mode. */
494 return intel_ddc_get_modes(connector
,
495 &dev_priv
->gmbus
[GMBUS_PORT_DPB
].adapter
);
498 static int intel_crt_set_property(struct drm_connector
*connector
,
499 struct drm_property
*property
,
505 static void intel_crt_reset(struct drm_connector
*connector
)
507 struct drm_device
*dev
= connector
->dev
;
508 struct intel_crt
*crt
= intel_attached_crt(connector
);
510 if (HAS_PCH_SPLIT(dev
))
511 crt
->force_hotplug_required
= 1;
515 * Routines for controlling stuff on the analog port
518 static const struct drm_encoder_helper_funcs intel_crt_helper_funcs
= {
519 .dpms
= intel_crt_dpms
,
520 .mode_fixup
= intel_crt_mode_fixup
,
521 .prepare
= intel_encoder_prepare
,
522 .commit
= intel_encoder_commit
,
523 .mode_set
= intel_crt_mode_set
,
526 static const struct drm_connector_funcs intel_crt_connector_funcs
= {
527 .reset
= intel_crt_reset
,
528 .dpms
= drm_helper_connector_dpms
,
529 .detect
= intel_crt_detect
,
530 .fill_modes
= drm_helper_probe_single_connector_modes
,
531 .destroy
= intel_crt_destroy
,
532 .set_property
= intel_crt_set_property
,
535 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs
= {
536 .mode_valid
= intel_crt_mode_valid
,
537 .get_modes
= intel_crt_get_modes
,
538 .best_encoder
= intel_best_encoder
,
541 static const struct drm_encoder_funcs intel_crt_enc_funcs
= {
542 .destroy
= intel_encoder_destroy
,
545 void intel_crt_init(struct drm_device
*dev
)
547 struct drm_connector
*connector
;
548 struct intel_crt
*crt
;
549 struct intel_connector
*intel_connector
;
550 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
552 crt
= kzalloc(sizeof(struct intel_crt
), GFP_KERNEL
);
556 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
557 if (!intel_connector
) {
562 connector
= &intel_connector
->base
;
563 drm_connector_init(dev
, &intel_connector
->base
,
564 &intel_crt_connector_funcs
, DRM_MODE_CONNECTOR_VGA
);
566 drm_encoder_init(dev
, &crt
->base
.base
, &intel_crt_enc_funcs
,
567 DRM_MODE_ENCODER_DAC
);
569 intel_connector_attach_encoder(intel_connector
, &crt
->base
);
571 crt
->base
.type
= INTEL_OUTPUT_ANALOG
;
572 crt
->base
.clone_mask
= (1 << INTEL_SDVO_NON_TV_CLONE_BIT
|
573 1 << INTEL_ANALOG_CLONE_BIT
|
574 1 << INTEL_SDVO_LVDS_CLONE_BIT
);
575 crt
->base
.crtc_mask
= (1 << 0) | (1 << 1);
576 connector
->interlace_allowed
= 1;
577 connector
->doublescan_allowed
= 0;
579 drm_encoder_helper_add(&crt
->base
.base
, &intel_crt_helper_funcs
);
580 drm_connector_helper_add(connector
, &intel_crt_connector_helper_funcs
);
582 drm_sysfs_connector_add(connector
);
584 if (I915_HAS_HOTPLUG(dev
))
585 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
587 connector
->polled
= DRM_CONNECTOR_POLL_CONNECT
;
590 * Configure the automatic hotplug detection stuff
592 crt
->force_hotplug_required
= 0;
593 if (HAS_PCH_SPLIT(dev
)) {
596 adpa
= I915_READ(PCH_ADPA
);
597 adpa
&= ~ADPA_CRT_HOTPLUG_MASK
;
598 adpa
|= ADPA_HOTPLUG_BITS
;
599 I915_WRITE(PCH_ADPA
, adpa
);
600 POSTING_READ(PCH_ADPA
);
602 DRM_DEBUG_KMS("pch crt adpa set to 0x%x\n", adpa
);
603 crt
->force_hotplug_required
= 1;
606 dev_priv
->hotplug_supported_mask
|= CRT_HOTPLUG_INT_STATUS
;