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 (IS_I965G(dev
) && !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
;
164 temp
= adpa
= I915_READ(PCH_ADPA
);
166 if (HAS_PCH_CPT(dev
)) {
167 /* Disable DAC before force detect */
168 I915_WRITE(PCH_ADPA
, adpa
& ~ADPA_DAC_ENABLE
);
169 (void)I915_READ(PCH_ADPA
);
171 adpa
&= ~ADPA_CRT_HOTPLUG_MASK
;
172 /* disable HPD first */
173 I915_WRITE(PCH_ADPA
, adpa
);
174 (void)I915_READ(PCH_ADPA
);
177 adpa
|= (ADPA_CRT_HOTPLUG_PERIOD_128
|
178 ADPA_CRT_HOTPLUG_WARMUP_10MS
|
179 ADPA_CRT_HOTPLUG_SAMPLE_4S
|
180 ADPA_CRT_HOTPLUG_VOLTAGE_50
| /* default */
181 ADPA_CRT_HOTPLUG_VOLREF_325MV
|
182 ADPA_CRT_HOTPLUG_ENABLE
|
183 ADPA_CRT_HOTPLUG_FORCE_TRIGGER
);
185 DRM_DEBUG_KMS("pch crt adpa 0x%x", adpa
);
186 I915_WRITE(PCH_ADPA
, adpa
);
188 while ((I915_READ(PCH_ADPA
) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER
) != 0)
191 if (HAS_PCH_CPT(dev
)) {
192 I915_WRITE(PCH_ADPA
, temp
);
193 (void)I915_READ(PCH_ADPA
);
196 /* Check the status to see if both blue and green are on now */
197 adpa
= I915_READ(PCH_ADPA
);
198 adpa
&= ADPA_CRT_HOTPLUG_MONITOR_MASK
;
199 if ((adpa
== ADPA_CRT_HOTPLUG_MONITOR_COLOR
) ||
200 (adpa
== ADPA_CRT_HOTPLUG_MONITOR_MONO
))
209 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
211 * Not for i915G/i915GM
213 * \return true if CRT is connected.
214 * \return false if CRT is disconnected.
216 static bool intel_crt_detect_hotplug(struct drm_connector
*connector
)
218 struct drm_device
*dev
= connector
->dev
;
219 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
220 u32 hotplug_en
, orig
, stat
;
224 if (HAS_PCH_SPLIT(dev
))
225 return intel_ironlake_crt_detect_hotplug(connector
);
228 * On 4 series desktop, CRT detect sequence need to be done twice
229 * to get a reliable result.
232 if (IS_G4X(dev
) && !IS_GM45(dev
))
236 hotplug_en
= orig
= I915_READ(PORT_HOTPLUG_EN
);
237 hotplug_en
&= CRT_HOTPLUG_MASK
;
238 hotplug_en
|= CRT_HOTPLUG_FORCE_DETECT
;
241 hotplug_en
|= CRT_HOTPLUG_ACTIVATION_PERIOD_64
;
243 hotplug_en
|= CRT_HOTPLUG_VOLTAGE_COMPARE_50
;
245 for (i
= 0; i
< tries
; i
++) {
246 unsigned long timeout
;
247 /* turn on the FORCE_DETECT */
248 I915_WRITE(PORT_HOTPLUG_EN
, hotplug_en
);
249 timeout
= jiffies
+ msecs_to_jiffies(1000);
250 /* wait for FORCE_DETECT to go off */
252 if (!(I915_READ(PORT_HOTPLUG_EN
) &
253 CRT_HOTPLUG_FORCE_DETECT
))
256 } while (time_after(timeout
, jiffies
));
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_encoder
*encoder
)
274 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
276 /* CRT should always be at 0, but check anyway */
277 if (intel_encoder
->type
!= INTEL_OUTPUT_ANALOG
)
280 return intel_ddc_probe(intel_encoder
);
283 static enum drm_connector_status
284 intel_crt_load_detect(struct drm_crtc
*crtc
, struct intel_encoder
*intel_encoder
)
286 struct drm_encoder
*encoder
= &intel_encoder
->enc
;
287 struct drm_device
*dev
= encoder
->dev
;
288 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
289 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
290 uint32_t pipe
= intel_crtc
->pipe
;
291 uint32_t save_bclrpat
;
292 uint32_t save_vtotal
;
293 uint32_t vtotal
, vactive
;
295 uint32_t vblank
, vblank_start
, vblank_end
;
297 uint32_t bclrpat_reg
;
301 uint32_t pipeconf_reg
;
302 uint32_t pipe_dsl_reg
;
304 enum drm_connector_status status
;
307 bclrpat_reg
= BCLRPAT_A
;
308 vtotal_reg
= VTOTAL_A
;
309 vblank_reg
= VBLANK_A
;
311 pipeconf_reg
= PIPEACONF
;
312 pipe_dsl_reg
= PIPEADSL
;
314 bclrpat_reg
= BCLRPAT_B
;
315 vtotal_reg
= VTOTAL_B
;
316 vblank_reg
= VBLANK_B
;
318 pipeconf_reg
= PIPEBCONF
;
319 pipe_dsl_reg
= PIPEBDSL
;
322 save_bclrpat
= I915_READ(bclrpat_reg
);
323 save_vtotal
= I915_READ(vtotal_reg
);
324 vblank
= I915_READ(vblank_reg
);
326 vtotal
= ((save_vtotal
>> 16) & 0xfff) + 1;
327 vactive
= (save_vtotal
& 0x7ff) + 1;
329 vblank_start
= (vblank
& 0xfff) + 1;
330 vblank_end
= ((vblank
>> 16) & 0xfff) + 1;
332 /* Set the border color to purple. */
333 I915_WRITE(bclrpat_reg
, 0x500050);
336 uint32_t pipeconf
= I915_READ(pipeconf_reg
);
337 I915_WRITE(pipeconf_reg
, pipeconf
| PIPECONF_FORCE_BORDER
);
338 /* Wait for next Vblank to substitue
339 * border color for Color info */
340 intel_wait_for_vblank(dev
);
341 st00
= I915_READ8(VGA_MSR_WRITE
);
342 status
= ((st00
& (1 << 4)) != 0) ?
343 connector_status_connected
:
344 connector_status_disconnected
;
346 I915_WRITE(pipeconf_reg
, pipeconf
);
348 bool restore_vblank
= false;
352 * If there isn't any border, add some.
353 * Yes, this will flicker
355 if (vblank_start
<= vactive
&& vblank_end
>= vtotal
) {
356 uint32_t vsync
= I915_READ(vsync_reg
);
357 uint32_t vsync_start
= (vsync
& 0xffff) + 1;
359 vblank_start
= vsync_start
;
360 I915_WRITE(vblank_reg
,
362 ((vblank_end
- 1) << 16));
363 restore_vblank
= true;
365 /* sample in the vertical border, selecting the larger one */
366 if (vblank_start
- vactive
>= vtotal
- vblank_end
)
367 vsample
= (vblank_start
+ vactive
) >> 1;
369 vsample
= (vtotal
+ vblank_end
) >> 1;
372 * Wait for the border to be displayed
374 while (I915_READ(pipe_dsl_reg
) >= vactive
)
376 while ((dsl
= I915_READ(pipe_dsl_reg
)) <= vsample
)
379 * Watch ST00 for an entire scanline
385 /* Read the ST00 VGA status register */
386 st00
= I915_READ8(VGA_MSR_WRITE
);
389 } while ((I915_READ(pipe_dsl_reg
) == dsl
));
391 /* restore vblank if necessary */
393 I915_WRITE(vblank_reg
, vblank
);
395 * If more than 3/4 of the scanline detected a monitor,
396 * then it is assumed to be present. This works even on i830,
397 * where there isn't any way to force the border color across
400 status
= detect
* 4 > count
* 3 ?
401 connector_status_connected
:
402 connector_status_disconnected
;
405 /* Restore previous settings */
406 I915_WRITE(bclrpat_reg
, save_bclrpat
);
411 static enum drm_connector_status
intel_crt_detect(struct drm_connector
*connector
)
413 struct drm_device
*dev
= connector
->dev
;
414 struct drm_encoder
*encoder
= intel_attached_encoder(connector
);
415 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
416 struct drm_crtc
*crtc
;
418 enum drm_connector_status status
;
420 if (IS_I9XX(dev
) && !IS_I915G(dev
) && !IS_I915GM(dev
)) {
421 if (intel_crt_detect_hotplug(connector
))
422 return connector_status_connected
;
424 return connector_status_disconnected
;
427 if (intel_crt_detect_ddc(encoder
))
428 return connector_status_connected
;
430 /* for pre-945g platforms use load detect */
431 if (encoder
->crtc
&& encoder
->crtc
->enabled
) {
432 status
= intel_crt_load_detect(encoder
->crtc
, intel_encoder
);
434 crtc
= intel_get_load_detect_pipe(intel_encoder
, connector
,
437 status
= intel_crt_load_detect(crtc
, intel_encoder
);
438 intel_release_load_detect_pipe(intel_encoder
,
439 connector
, dpms_mode
);
441 status
= connector_status_unknown
;
447 static void intel_crt_destroy(struct drm_connector
*connector
)
449 drm_sysfs_connector_remove(connector
);
450 drm_connector_cleanup(connector
);
454 static int intel_crt_get_modes(struct drm_connector
*connector
)
457 struct drm_encoder
*encoder
= intel_attached_encoder(connector
);
458 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
459 struct i2c_adapter
*ddc_bus
;
460 struct drm_device
*dev
= connector
->dev
;
463 ret
= intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
);
464 if (ret
|| !IS_G4X(dev
))
467 /* Try to probe digital port for output in DVI-I -> VGA mode. */
468 ddc_bus
= intel_i2c_create(connector
->dev
, GPIOD
, "CRTDDC_D");
471 dev_printk(KERN_ERR
, &connector
->dev
->pdev
->dev
,
472 "DDC bus registration failed for CRTDDC_D.\n");
475 /* Try to get modes by GPIOD port */
476 ret
= intel_ddc_get_modes(connector
, ddc_bus
);
477 intel_i2c_destroy(ddc_bus
);
484 static int intel_crt_set_property(struct drm_connector
*connector
,
485 struct drm_property
*property
,
492 * Routines for controlling stuff on the analog port
495 static const struct drm_encoder_helper_funcs intel_crt_helper_funcs
= {
496 .dpms
= intel_crt_dpms
,
497 .mode_fixup
= intel_crt_mode_fixup
,
498 .prepare
= intel_encoder_prepare
,
499 .commit
= intel_encoder_commit
,
500 .mode_set
= intel_crt_mode_set
,
503 static const struct drm_connector_funcs intel_crt_connector_funcs
= {
504 .dpms
= drm_helper_connector_dpms
,
505 .detect
= intel_crt_detect
,
506 .fill_modes
= drm_helper_probe_single_connector_modes
,
507 .destroy
= intel_crt_destroy
,
508 .set_property
= intel_crt_set_property
,
511 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs
= {
512 .mode_valid
= intel_crt_mode_valid
,
513 .get_modes
= intel_crt_get_modes
,
514 .best_encoder
= intel_attached_encoder
,
517 static void intel_crt_enc_destroy(struct drm_encoder
*encoder
)
519 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
521 intel_i2c_destroy(intel_encoder
->ddc_bus
);
522 drm_encoder_cleanup(encoder
);
523 kfree(intel_encoder
);
526 static const struct drm_encoder_funcs intel_crt_enc_funcs
= {
527 .destroy
= intel_crt_enc_destroy
,
530 void intel_crt_init(struct drm_device
*dev
)
532 struct drm_connector
*connector
;
533 struct intel_encoder
*intel_encoder
;
534 struct intel_connector
*intel_connector
;
535 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
538 intel_encoder
= kzalloc(sizeof(struct intel_encoder
), GFP_KERNEL
);
542 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
543 if (!intel_connector
) {
544 kfree(intel_encoder
);
548 connector
= &intel_connector
->base
;
549 drm_connector_init(dev
, &intel_connector
->base
,
550 &intel_crt_connector_funcs
, DRM_MODE_CONNECTOR_VGA
);
552 drm_encoder_init(dev
, &intel_encoder
->enc
, &intel_crt_enc_funcs
,
553 DRM_MODE_ENCODER_DAC
);
555 drm_mode_connector_attach_encoder(&intel_connector
->base
,
556 &intel_encoder
->enc
);
558 /* Set up the DDC bus. */
559 if (HAS_PCH_SPLIT(dev
))
563 /* Use VBT information for CRT DDC if available */
564 if (dev_priv
->crt_ddc_bus
!= 0)
565 i2c_reg
= dev_priv
->crt_ddc_bus
;
567 intel_encoder
->ddc_bus
= intel_i2c_create(dev
, i2c_reg
, "CRTDDC_A");
568 if (!intel_encoder
->ddc_bus
) {
569 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
574 intel_encoder
->type
= INTEL_OUTPUT_ANALOG
;
575 intel_encoder
->clone_mask
= (1 << INTEL_SDVO_NON_TV_CLONE_BIT
) |
576 (1 << INTEL_ANALOG_CLONE_BIT
) |
577 (1 << INTEL_SDVO_LVDS_CLONE_BIT
);
578 intel_encoder
->crtc_mask
= (1 << 0) | (1 << 1);
579 connector
->interlace_allowed
= 1;
580 connector
->doublescan_allowed
= 0;
582 drm_encoder_helper_add(&intel_encoder
->enc
, &intel_crt_helper_funcs
);
583 drm_connector_helper_add(connector
, &intel_crt_connector_helper_funcs
);
585 drm_sysfs_connector_add(connector
);
587 if (I915_HAS_HOTPLUG(dev
))
588 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
590 connector
->polled
= DRM_CONNECTOR_POLL_CONNECT
;
592 dev_priv
->hotplug_supported_mask
|= CRT_HOTPLUG_INT_STATUS
;