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 if (intel_crtc
->pipe
== 0)
133 dpll_md_reg
= DPLL_A_MD
;
135 dpll_md_reg
= DPLL_B_MD
;
137 if (HAS_PCH_SPLIT(dev
))
143 * Disable separate mode multiplier used when cloning SDVO to CRT
144 * XXX this needs to be adjusted when we really are cloning
146 if (INTEL_INFO(dev
)->gen
>= 4 && !HAS_PCH_SPLIT(dev
)) {
147 dpll_md
= I915_READ(dpll_md_reg
);
148 I915_WRITE(dpll_md_reg
,
149 dpll_md
& ~DPLL_MD_UDI_MULTIPLIER_MASK
);
152 adpa
= ADPA_HOTPLUG_BITS
;
153 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PHSYNC
)
154 adpa
|= ADPA_HSYNC_ACTIVE_HIGH
;
155 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PVSYNC
)
156 adpa
|= ADPA_VSYNC_ACTIVE_HIGH
;
158 if (intel_crtc
->pipe
== 0) {
159 if (HAS_PCH_CPT(dev
))
160 adpa
|= PORT_TRANS_A_SEL_CPT
;
162 adpa
|= ADPA_PIPE_A_SELECT
;
163 if (!HAS_PCH_SPLIT(dev
))
164 I915_WRITE(BCLRPAT_A
, 0);
166 if (HAS_PCH_CPT(dev
))
167 adpa
|= PORT_TRANS_B_SEL_CPT
;
169 adpa
|= ADPA_PIPE_B_SELECT
;
170 if (!HAS_PCH_SPLIT(dev
))
171 I915_WRITE(BCLRPAT_B
, 0);
174 I915_WRITE(adpa_reg
, adpa
);
177 static bool intel_ironlake_crt_detect_hotplug(struct drm_connector
*connector
)
179 struct drm_device
*dev
= connector
->dev
;
180 struct intel_crt
*crt
= intel_attached_crt(connector
);
181 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
185 /* The first time through, trigger an explicit detection cycle */
186 if (crt
->force_hotplug_required
) {
187 bool turn_off_dac
= HAS_PCH_SPLIT(dev
);
190 crt
->force_hotplug_required
= 0;
192 save_adpa
= adpa
= I915_READ(PCH_ADPA
);
193 DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa
);
195 adpa
|= ADPA_CRT_HOTPLUG_FORCE_TRIGGER
;
197 adpa
&= ~ADPA_DAC_ENABLE
;
199 I915_WRITE(PCH_ADPA
, adpa
);
201 if (wait_for((I915_READ(PCH_ADPA
) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER
) == 0,
203 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
206 I915_WRITE(PCH_ADPA
, save_adpa
);
207 POSTING_READ(PCH_ADPA
);
211 /* Check the status to see if both blue and green are on now */
212 adpa
= I915_READ(PCH_ADPA
);
213 if ((adpa
& ADPA_CRT_HOTPLUG_MONITOR_MASK
) != 0)
217 DRM_DEBUG_KMS("ironlake hotplug adpa=0x%x, result %d\n", adpa
, ret
);
223 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
225 * Not for i915G/i915GM
227 * \return true if CRT is connected.
228 * \return false if CRT is disconnected.
230 static bool intel_crt_detect_hotplug(struct drm_connector
*connector
)
232 struct drm_device
*dev
= connector
->dev
;
233 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
234 u32 hotplug_en
, orig
, stat
;
238 if (HAS_PCH_SPLIT(dev
))
239 return intel_ironlake_crt_detect_hotplug(connector
);
242 * On 4 series desktop, CRT detect sequence need to be done twice
243 * to get a reliable result.
246 if (IS_G4X(dev
) && !IS_GM45(dev
))
250 hotplug_en
= orig
= I915_READ(PORT_HOTPLUG_EN
);
251 hotplug_en
|= CRT_HOTPLUG_FORCE_DETECT
;
253 for (i
= 0; i
< tries
; i
++) {
254 /* turn on the FORCE_DETECT */
255 I915_WRITE(PORT_HOTPLUG_EN
, hotplug_en
);
256 /* wait for FORCE_DETECT to go off */
257 if (wait_for((I915_READ(PORT_HOTPLUG_EN
) &
258 CRT_HOTPLUG_FORCE_DETECT
) == 0,
260 DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off");
263 stat
= I915_READ(PORT_HOTPLUG_STAT
);
264 if ((stat
& CRT_HOTPLUG_MONITOR_MASK
) != CRT_HOTPLUG_MONITOR_NONE
)
267 /* clear the interrupt we just generated, if any */
268 I915_WRITE(PORT_HOTPLUG_STAT
, CRT_HOTPLUG_INT_STATUS
);
270 /* and put the bits back */
271 I915_WRITE(PORT_HOTPLUG_EN
, orig
);
276 static bool intel_crt_ddc_probe(struct drm_i915_private
*dev_priv
, int ddc_bus
)
279 struct i2c_msg msgs
[] = {
287 /* DDC monitor detect: Does it ACK a write to 0xA0? */
288 return i2c_transfer(&dev_priv
->gmbus
[ddc_bus
].adapter
, msgs
, 1) == 1;
291 static bool intel_crt_detect_ddc(struct drm_connector
*connector
)
293 struct intel_crt
*crt
= intel_attached_crt(connector
);
294 struct drm_i915_private
*dev_priv
= crt
->base
.base
.dev
->dev_private
;
296 /* CRT should always be at 0, but check anyway */
297 if (crt
->base
.type
!= INTEL_OUTPUT_ANALOG
)
300 if (intel_crt_ddc_probe(dev_priv
, dev_priv
->crt_ddc_pin
)) {
301 DRM_DEBUG_KMS("CRT detected via DDC:0xa0\n");
305 if (intel_ddc_probe(&crt
->base
, dev_priv
->crt_ddc_pin
)) {
307 bool is_digital
= false;
309 edid
= drm_get_edid(connector
,
310 &dev_priv
->gmbus
[dev_priv
->crt_ddc_pin
].adapter
);
312 * This may be a DVI-I connector with a shared DDC
313 * link between analog and digital outputs, so we
314 * have to check the EDID input spec of the attached device.
317 is_digital
= edid
->input
& DRM_EDID_INPUT_DIGITAL
;
318 connector
->display_info
.raw_edid
= NULL
;
323 DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n");
331 static enum drm_connector_status
332 intel_crt_load_detect(struct drm_crtc
*crtc
, struct intel_crt
*crt
)
334 struct drm_encoder
*encoder
= &crt
->base
.base
;
335 struct drm_device
*dev
= encoder
->dev
;
336 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
337 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
338 uint32_t pipe
= intel_crtc
->pipe
;
339 uint32_t save_bclrpat
;
340 uint32_t save_vtotal
;
341 uint32_t vtotal
, vactive
;
343 uint32_t vblank
, vblank_start
, vblank_end
;
345 uint32_t bclrpat_reg
;
349 uint32_t pipeconf_reg
;
350 uint32_t pipe_dsl_reg
;
352 enum drm_connector_status status
;
354 DRM_DEBUG_KMS("starting load-detect on CRT\n");
357 bclrpat_reg
= BCLRPAT_A
;
358 vtotal_reg
= VTOTAL_A
;
359 vblank_reg
= VBLANK_A
;
361 pipeconf_reg
= PIPEACONF
;
362 pipe_dsl_reg
= PIPEADSL
;
364 bclrpat_reg
= BCLRPAT_B
;
365 vtotal_reg
= VTOTAL_B
;
366 vblank_reg
= VBLANK_B
;
368 pipeconf_reg
= PIPEBCONF
;
369 pipe_dsl_reg
= PIPEBDSL
;
372 save_bclrpat
= I915_READ(bclrpat_reg
);
373 save_vtotal
= I915_READ(vtotal_reg
);
374 vblank
= I915_READ(vblank_reg
);
376 vtotal
= ((save_vtotal
>> 16) & 0xfff) + 1;
377 vactive
= (save_vtotal
& 0x7ff) + 1;
379 vblank_start
= (vblank
& 0xfff) + 1;
380 vblank_end
= ((vblank
>> 16) & 0xfff) + 1;
382 /* Set the border color to purple. */
383 I915_WRITE(bclrpat_reg
, 0x500050);
386 uint32_t pipeconf
= I915_READ(pipeconf_reg
);
387 I915_WRITE(pipeconf_reg
, pipeconf
| PIPECONF_FORCE_BORDER
);
388 POSTING_READ(pipeconf_reg
);
389 /* Wait for next Vblank to substitue
390 * border color for Color info */
391 intel_wait_for_vblank(dev
, pipe
);
392 st00
= I915_READ8(VGA_MSR_WRITE
);
393 status
= ((st00
& (1 << 4)) != 0) ?
394 connector_status_connected
:
395 connector_status_disconnected
;
397 I915_WRITE(pipeconf_reg
, pipeconf
);
399 bool restore_vblank
= false;
403 * If there isn't any border, add some.
404 * Yes, this will flicker
406 if (vblank_start
<= vactive
&& vblank_end
>= vtotal
) {
407 uint32_t vsync
= I915_READ(vsync_reg
);
408 uint32_t vsync_start
= (vsync
& 0xffff) + 1;
410 vblank_start
= vsync_start
;
411 I915_WRITE(vblank_reg
,
413 ((vblank_end
- 1) << 16));
414 restore_vblank
= true;
416 /* sample in the vertical border, selecting the larger one */
417 if (vblank_start
- vactive
>= vtotal
- vblank_end
)
418 vsample
= (vblank_start
+ vactive
) >> 1;
420 vsample
= (vtotal
+ vblank_end
) >> 1;
423 * Wait for the border to be displayed
425 while (I915_READ(pipe_dsl_reg
) >= vactive
)
427 while ((dsl
= I915_READ(pipe_dsl_reg
)) <= vsample
)
430 * Watch ST00 for an entire scanline
436 /* Read the ST00 VGA status register */
437 st00
= I915_READ8(VGA_MSR_WRITE
);
440 } while ((I915_READ(pipe_dsl_reg
) == dsl
));
442 /* restore vblank if necessary */
444 I915_WRITE(vblank_reg
, vblank
);
446 * If more than 3/4 of the scanline detected a monitor,
447 * then it is assumed to be present. This works even on i830,
448 * where there isn't any way to force the border color across
451 status
= detect
* 4 > count
* 3 ?
452 connector_status_connected
:
453 connector_status_disconnected
;
456 /* Restore previous settings */
457 I915_WRITE(bclrpat_reg
, save_bclrpat
);
462 static enum drm_connector_status
463 intel_crt_detect(struct drm_connector
*connector
, bool force
)
465 struct drm_device
*dev
= connector
->dev
;
466 struct intel_crt
*crt
= intel_attached_crt(connector
);
467 struct drm_crtc
*crtc
;
469 enum drm_connector_status status
;
471 if (I915_HAS_HOTPLUG(dev
)) {
472 if (intel_crt_detect_hotplug(connector
)) {
473 DRM_DEBUG_KMS("CRT detected via hotplug\n");
474 return connector_status_connected
;
476 DRM_DEBUG_KMS("CRT not detected via hotplug\n");
477 return connector_status_disconnected
;
481 if (intel_crt_detect_ddc(connector
))
482 return connector_status_connected
;
485 return connector
->status
;
487 /* for pre-945g platforms use load detect */
488 crtc
= crt
->base
.base
.crtc
;
489 if (crtc
&& crtc
->enabled
) {
490 status
= intel_crt_load_detect(crtc
, crt
);
492 crtc
= intel_get_load_detect_pipe(&crt
->base
, connector
,
495 if (intel_crt_detect_ddc(connector
))
496 status
= connector_status_connected
;
498 status
= intel_crt_load_detect(crtc
, crt
);
499 intel_release_load_detect_pipe(&crt
->base
,
500 connector
, dpms_mode
);
502 status
= connector_status_unknown
;
508 static void intel_crt_destroy(struct drm_connector
*connector
)
510 drm_sysfs_connector_remove(connector
);
511 drm_connector_cleanup(connector
);
515 static int intel_crt_get_modes(struct drm_connector
*connector
)
517 struct drm_device
*dev
= connector
->dev
;
518 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
521 ret
= intel_ddc_get_modes(connector
,
522 &dev_priv
->gmbus
[dev_priv
->crt_ddc_pin
].adapter
);
523 if (ret
|| !IS_G4X(dev
))
526 /* Try to probe digital port for output in DVI-I -> VGA mode. */
527 return intel_ddc_get_modes(connector
,
528 &dev_priv
->gmbus
[GMBUS_PORT_DPB
].adapter
);
531 static int intel_crt_set_property(struct drm_connector
*connector
,
532 struct drm_property
*property
,
539 * Routines for controlling stuff on the analog port
542 static const struct drm_encoder_helper_funcs intel_crt_helper_funcs
= {
543 .dpms
= intel_crt_dpms
,
544 .mode_fixup
= intel_crt_mode_fixup
,
545 .prepare
= intel_encoder_prepare
,
546 .commit
= intel_encoder_commit
,
547 .mode_set
= intel_crt_mode_set
,
550 static const struct drm_connector_funcs intel_crt_connector_funcs
= {
551 .dpms
= drm_helper_connector_dpms
,
552 .detect
= intel_crt_detect
,
553 .fill_modes
= drm_helper_probe_single_connector_modes
,
554 .destroy
= intel_crt_destroy
,
555 .set_property
= intel_crt_set_property
,
558 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs
= {
559 .mode_valid
= intel_crt_mode_valid
,
560 .get_modes
= intel_crt_get_modes
,
561 .best_encoder
= intel_best_encoder
,
564 static const struct drm_encoder_funcs intel_crt_enc_funcs
= {
565 .destroy
= intel_encoder_destroy
,
568 void intel_crt_init(struct drm_device
*dev
)
570 struct drm_connector
*connector
;
571 struct intel_crt
*crt
;
572 struct intel_connector
*intel_connector
;
573 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
575 crt
= kzalloc(sizeof(struct intel_crt
), GFP_KERNEL
);
579 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
580 if (!intel_connector
) {
585 connector
= &intel_connector
->base
;
586 drm_connector_init(dev
, &intel_connector
->base
,
587 &intel_crt_connector_funcs
, DRM_MODE_CONNECTOR_VGA
);
589 drm_encoder_init(dev
, &crt
->base
.base
, &intel_crt_enc_funcs
,
590 DRM_MODE_ENCODER_DAC
);
592 intel_connector_attach_encoder(intel_connector
, &crt
->base
);
594 crt
->base
.type
= INTEL_OUTPUT_ANALOG
;
595 crt
->base
.clone_mask
= (1 << INTEL_SDVO_NON_TV_CLONE_BIT
|
596 1 << INTEL_ANALOG_CLONE_BIT
|
597 1 << INTEL_SDVO_LVDS_CLONE_BIT
);
598 crt
->base
.crtc_mask
= (1 << 0) | (1 << 1);
599 connector
->interlace_allowed
= 1;
600 connector
->doublescan_allowed
= 0;
602 drm_encoder_helper_add(&crt
->base
.base
, &intel_crt_helper_funcs
);
603 drm_connector_helper_add(connector
, &intel_crt_connector_helper_funcs
);
605 drm_sysfs_connector_add(connector
);
607 if (I915_HAS_HOTPLUG(dev
))
608 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
610 connector
->polled
= DRM_CONNECTOR_POLL_CONNECT
;
613 * Configure the automatic hotplug detection stuff
615 crt
->force_hotplug_required
= 0;
616 if (HAS_PCH_SPLIT(dev
)) {
619 adpa
= I915_READ(PCH_ADPA
);
620 adpa
&= ~ADPA_CRT_HOTPLUG_MASK
;
621 adpa
|= ADPA_HOTPLUG_BITS
;
622 I915_WRITE(PCH_ADPA
, adpa
);
623 POSTING_READ(PCH_ADPA
);
625 DRM_DEBUG_KMS("pch crt adpa set to 0x%x\n", adpa
);
626 crt
->force_hotplug_required
= 1;
629 dev_priv
->hotplug_supported_mask
|= CRT_HOTPLUG_INT_STATUS
;