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/dmi.h>
28 #include <linux/i2c.h>
29 #include <linux/slab.h>
33 #include "drm_crtc_helper.h"
35 #include "intel_drv.h"
39 /* Here's the desired hotplug mode */
40 #define ADPA_HOTPLUG_BITS (ADPA_CRT_HOTPLUG_PERIOD_128 | \
41 ADPA_CRT_HOTPLUG_WARMUP_10MS | \
42 ADPA_CRT_HOTPLUG_SAMPLE_4S | \
43 ADPA_CRT_HOTPLUG_VOLTAGE_50 | \
44 ADPA_CRT_HOTPLUG_VOLREF_325MV | \
45 ADPA_CRT_HOTPLUG_ENABLE)
48 struct intel_encoder base
;
49 bool force_hotplug_required
;
52 static struct intel_crt
*intel_attached_crt(struct drm_connector
*connector
)
54 return container_of(intel_attached_encoder(connector
),
55 struct intel_crt
, base
);
58 static void intel_crt_dpms(struct drm_encoder
*encoder
, int mode
)
60 struct drm_device
*dev
= encoder
->dev
;
61 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
64 if (HAS_PCH_SPLIT(dev
))
69 temp
= I915_READ(reg
);
70 temp
&= ~(ADPA_HSYNC_CNTL_DISABLE
| ADPA_VSYNC_CNTL_DISABLE
);
71 temp
&= ~ADPA_DAC_ENABLE
;
74 case DRM_MODE_DPMS_ON
:
75 temp
|= ADPA_DAC_ENABLE
;
77 case DRM_MODE_DPMS_STANDBY
:
78 temp
|= ADPA_DAC_ENABLE
| ADPA_HSYNC_CNTL_DISABLE
;
80 case DRM_MODE_DPMS_SUSPEND
:
81 temp
|= ADPA_DAC_ENABLE
| ADPA_VSYNC_CNTL_DISABLE
;
83 case DRM_MODE_DPMS_OFF
:
84 temp
|= ADPA_HSYNC_CNTL_DISABLE
| ADPA_VSYNC_CNTL_DISABLE
;
88 I915_WRITE(reg
, temp
);
91 static int intel_crt_mode_valid(struct drm_connector
*connector
,
92 struct drm_display_mode
*mode
)
94 struct drm_device
*dev
= connector
->dev
;
97 if (mode
->flags
& DRM_MODE_FLAG_DBLSCAN
)
98 return MODE_NO_DBLESCAN
;
100 if (mode
->clock
< 25000)
101 return MODE_CLOCK_LOW
;
107 if (mode
->clock
> max_clock
)
108 return MODE_CLOCK_HIGH
;
113 static bool intel_crt_mode_fixup(struct drm_encoder
*encoder
,
114 struct drm_display_mode
*mode
,
115 struct drm_display_mode
*adjusted_mode
)
120 static void intel_crt_mode_set(struct drm_encoder
*encoder
,
121 struct drm_display_mode
*mode
,
122 struct drm_display_mode
*adjusted_mode
)
125 struct drm_device
*dev
= encoder
->dev
;
126 struct drm_crtc
*crtc
= encoder
->crtc
;
127 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
128 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
133 dpll_md_reg
= DPLL_MD(intel_crtc
->pipe
);
135 if (HAS_PCH_SPLIT(dev
))
141 * Disable separate mode multiplier used when cloning SDVO to CRT
142 * XXX this needs to be adjusted when we really are cloning
144 if (INTEL_INFO(dev
)->gen
>= 4 && !HAS_PCH_SPLIT(dev
)) {
145 dpll_md
= I915_READ(dpll_md_reg
);
146 I915_WRITE(dpll_md_reg
,
147 dpll_md
& ~DPLL_MD_UDI_MULTIPLIER_MASK
);
150 adpa
= ADPA_HOTPLUG_BITS
;
151 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PHSYNC
)
152 adpa
|= ADPA_HSYNC_ACTIVE_HIGH
;
153 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PVSYNC
)
154 adpa
|= ADPA_VSYNC_ACTIVE_HIGH
;
156 /* For CPT allow 3 pipe config, for others just use A or B */
157 if (HAS_PCH_CPT(dev
))
158 adpa
|= PORT_TRANS_SEL_CPT(intel_crtc
->pipe
);
159 else if (intel_crtc
->pipe
== 0)
160 adpa
|= ADPA_PIPE_A_SELECT
;
162 adpa
|= ADPA_PIPE_B_SELECT
;
164 if (!HAS_PCH_SPLIT(dev
))
165 I915_WRITE(BCLRPAT(intel_crtc
->pipe
), 0);
167 I915_WRITE(adpa_reg
, adpa
);
170 static bool intel_ironlake_crt_detect_hotplug(struct drm_connector
*connector
)
172 struct drm_device
*dev
= connector
->dev
;
173 struct intel_crt
*crt
= intel_attached_crt(connector
);
174 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
178 /* The first time through, trigger an explicit detection cycle */
179 if (crt
->force_hotplug_required
) {
180 bool turn_off_dac
= HAS_PCH_SPLIT(dev
);
183 crt
->force_hotplug_required
= 0;
185 save_adpa
= adpa
= I915_READ(PCH_ADPA
);
186 DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa
);
188 adpa
|= ADPA_CRT_HOTPLUG_FORCE_TRIGGER
;
190 adpa
&= ~ADPA_DAC_ENABLE
;
192 I915_WRITE(PCH_ADPA
, adpa
);
194 if (wait_for((I915_READ(PCH_ADPA
) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER
) == 0,
196 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
199 I915_WRITE(PCH_ADPA
, save_adpa
);
200 POSTING_READ(PCH_ADPA
);
204 /* Check the status to see if both blue and green are on now */
205 adpa
= I915_READ(PCH_ADPA
);
206 if ((adpa
& ADPA_CRT_HOTPLUG_MONITOR_MASK
) != 0)
210 DRM_DEBUG_KMS("ironlake hotplug adpa=0x%x, result %d\n", adpa
, ret
);
216 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
218 * Not for i915G/i915GM
220 * \return true if CRT is connected.
221 * \return false if CRT is disconnected.
223 static bool intel_crt_detect_hotplug(struct drm_connector
*connector
)
225 struct drm_device
*dev
= connector
->dev
;
226 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
227 u32 hotplug_en
, orig
, stat
;
231 if (HAS_PCH_SPLIT(dev
))
232 return intel_ironlake_crt_detect_hotplug(connector
);
235 * On 4 series desktop, CRT detect sequence need to be done twice
236 * to get a reliable result.
239 if (IS_G4X(dev
) && !IS_GM45(dev
))
243 hotplug_en
= orig
= I915_READ(PORT_HOTPLUG_EN
);
244 hotplug_en
|= CRT_HOTPLUG_FORCE_DETECT
;
246 for (i
= 0; i
< tries
; i
++) {
247 /* turn on the FORCE_DETECT */
248 I915_WRITE(PORT_HOTPLUG_EN
, hotplug_en
);
249 /* wait for FORCE_DETECT to go off */
250 if (wait_for((I915_READ(PORT_HOTPLUG_EN
) &
251 CRT_HOTPLUG_FORCE_DETECT
) == 0,
253 DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off");
256 stat
= I915_READ(PORT_HOTPLUG_STAT
);
257 if ((stat
& CRT_HOTPLUG_MONITOR_MASK
) != CRT_HOTPLUG_MONITOR_NONE
)
260 /* clear the interrupt we just generated, if any */
261 I915_WRITE(PORT_HOTPLUG_STAT
, CRT_HOTPLUG_INT_STATUS
);
263 /* and put the bits back */
264 I915_WRITE(PORT_HOTPLUG_EN
, orig
);
269 static bool intel_crt_detect_ddc(struct drm_connector
*connector
)
271 struct intel_crt
*crt
= intel_attached_crt(connector
);
272 struct drm_i915_private
*dev_priv
= crt
->base
.base
.dev
->dev_private
;
274 /* CRT should always be at 0, but check anyway */
275 if (crt
->base
.type
!= INTEL_OUTPUT_ANALOG
)
278 if (intel_ddc_probe(&crt
->base
, dev_priv
->crt_ddc_pin
)) {
280 bool is_digital
= false;
281 struct i2c_adapter
*i2c
;
283 i2c
= intel_gmbus_get_adapter(dev_priv
, dev_priv
->crt_ddc_pin
);
284 edid
= drm_get_edid(connector
, i2c
);
286 * This may be a DVI-I connector with a shared DDC
287 * link between analog and digital outputs, so we
288 * have to check the EDID input spec of the attached device.
290 * On the other hand, what should we do if it is a broken EDID?
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");
302 DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n");
309 static enum drm_connector_status
310 intel_crt_load_detect(struct intel_crt
*crt
)
312 struct drm_device
*dev
= crt
->base
.base
.dev
;
313 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
314 uint32_t pipe
= to_intel_crtc(crt
->base
.base
.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
;
435 enum drm_connector_status status
;
437 if (I915_HAS_HOTPLUG(dev
)) {
438 if (intel_crt_detect_hotplug(connector
)) {
439 DRM_DEBUG_KMS("CRT detected via hotplug\n");
440 return connector_status_connected
;
442 DRM_DEBUG_KMS("CRT not detected via hotplug\n");
443 return connector_status_disconnected
;
447 if (intel_crt_detect_ddc(connector
))
448 return connector_status_connected
;
451 return connector
->status
;
453 /* for pre-945g platforms use load detect */
454 crtc
= crt
->base
.base
.crtc
;
455 if (crtc
&& crtc
->enabled
) {
456 status
= intel_crt_load_detect(crt
);
458 struct intel_load_detect_pipe tmp
;
460 if (intel_get_load_detect_pipe(&crt
->base
, connector
, NULL
,
462 if (intel_crt_detect_ddc(connector
))
463 status
= connector_status_connected
;
465 status
= intel_crt_load_detect(crt
);
466 intel_release_load_detect_pipe(&crt
->base
, connector
,
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
;
487 struct i2c_adapter
*i2c
;
489 i2c
= intel_gmbus_get_adapter(dev_priv
, dev_priv
->crt_ddc_pin
);
490 ret
= intel_ddc_get_modes(connector
, i2c
);
491 if (ret
|| !IS_G4X(dev
))
494 /* Try to probe digital port for output in DVI-I -> VGA mode. */
495 i2c
= intel_gmbus_get_adapter(dev_priv
, GMBUS_PORT_DPB
);
496 return intel_ddc_get_modes(connector
, i2c
);
499 static int intel_crt_set_property(struct drm_connector
*connector
,
500 struct drm_property
*property
,
506 static void intel_crt_reset(struct drm_connector
*connector
)
508 struct drm_device
*dev
= connector
->dev
;
509 struct intel_crt
*crt
= intel_attached_crt(connector
);
511 if (HAS_PCH_SPLIT(dev
))
512 crt
->force_hotplug_required
= 1;
516 * Routines for controlling stuff on the analog port
519 static const struct drm_encoder_helper_funcs intel_crt_helper_funcs
= {
520 .dpms
= intel_crt_dpms
,
521 .mode_fixup
= intel_crt_mode_fixup
,
522 .prepare
= intel_encoder_prepare
,
523 .commit
= intel_encoder_commit
,
524 .mode_set
= intel_crt_mode_set
,
527 static const struct drm_connector_funcs intel_crt_connector_funcs
= {
528 .reset
= intel_crt_reset
,
529 .dpms
= drm_helper_connector_dpms
,
530 .detect
= intel_crt_detect
,
531 .fill_modes
= drm_helper_probe_single_connector_modes
,
532 .destroy
= intel_crt_destroy
,
533 .set_property
= intel_crt_set_property
,
536 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs
= {
537 .mode_valid
= intel_crt_mode_valid
,
538 .get_modes
= intel_crt_get_modes
,
539 .best_encoder
= intel_best_encoder
,
542 static const struct drm_encoder_funcs intel_crt_enc_funcs
= {
543 .destroy
= intel_encoder_destroy
,
546 static int __init
intel_no_crt_dmi_callback(const struct dmi_system_id
*id
)
548 DRM_DEBUG_KMS("Skipping CRT initialization for %s\n", id
->ident
);
552 static const struct dmi_system_id intel_no_crt
[] = {
554 .callback
= intel_no_crt_dmi_callback
,
557 DMI_MATCH(DMI_SYS_VENDOR
, "ACER"),
558 DMI_MATCH(DMI_PRODUCT_NAME
, "ZGB"),
564 void intel_crt_init(struct drm_device
*dev
)
566 struct drm_connector
*connector
;
567 struct intel_crt
*crt
;
568 struct intel_connector
*intel_connector
;
569 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
571 /* Skip machines without VGA that falsely report hotplug events */
572 if (dmi_check_system(intel_no_crt
))
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);
600 connector
->interlace_allowed
= 0;
602 connector
->interlace_allowed
= 1;
603 connector
->doublescan_allowed
= 0;
605 drm_encoder_helper_add(&crt
->base
.base
, &intel_crt_helper_funcs
);
606 drm_connector_helper_add(connector
, &intel_crt_connector_helper_funcs
);
608 drm_sysfs_connector_add(connector
);
610 if (I915_HAS_HOTPLUG(dev
))
611 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
613 connector
->polled
= DRM_CONNECTOR_POLL_CONNECT
;
616 * Configure the automatic hotplug detection stuff
618 crt
->force_hotplug_required
= 0;
619 if (HAS_PCH_SPLIT(dev
)) {
622 adpa
= I915_READ(PCH_ADPA
);
623 adpa
&= ~ADPA_CRT_HOTPLUG_MASK
;
624 adpa
|= ADPA_HOTPLUG_BITS
;
625 I915_WRITE(PCH_ADPA
, adpa
);
626 POSTING_READ(PCH_ADPA
);
628 DRM_DEBUG_KMS("pch crt adpa set to 0x%x\n", adpa
);
629 crt
->force_hotplug_required
= 1;
632 dev_priv
->hotplug_supported_mask
|= CRT_HOTPLUG_INT_STATUS
;