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_FORCE_DETECT
;
239 for (i
= 0; i
< tries
; i
++) {
240 unsigned long timeout
;
241 /* turn on the FORCE_DETECT */
242 I915_WRITE(PORT_HOTPLUG_EN
, hotplug_en
);
243 timeout
= jiffies
+ msecs_to_jiffies(1000);
244 /* wait for FORCE_DETECT to go off */
246 if (!(I915_READ(PORT_HOTPLUG_EN
) &
247 CRT_HOTPLUG_FORCE_DETECT
))
250 } while (time_after(timeout
, jiffies
));
253 stat
= I915_READ(PORT_HOTPLUG_STAT
);
254 if ((stat
& CRT_HOTPLUG_MONITOR_MASK
) != CRT_HOTPLUG_MONITOR_NONE
)
257 /* clear the interrupt we just generated, if any */
258 I915_WRITE(PORT_HOTPLUG_STAT
, CRT_HOTPLUG_INT_STATUS
);
260 /* and put the bits back */
261 I915_WRITE(PORT_HOTPLUG_EN
, orig
);
266 static bool intel_crt_detect_ddc(struct drm_encoder
*encoder
)
268 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
270 /* CRT should always be at 0, but check anyway */
271 if (intel_encoder
->type
!= INTEL_OUTPUT_ANALOG
)
274 return intel_ddc_probe(intel_encoder
);
277 static enum drm_connector_status
278 intel_crt_load_detect(struct drm_crtc
*crtc
, struct intel_encoder
*intel_encoder
)
280 struct drm_encoder
*encoder
= &intel_encoder
->enc
;
281 struct drm_device
*dev
= encoder
->dev
;
282 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
283 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
284 uint32_t pipe
= intel_crtc
->pipe
;
285 uint32_t save_bclrpat
;
286 uint32_t save_vtotal
;
287 uint32_t vtotal
, vactive
;
289 uint32_t vblank
, vblank_start
, vblank_end
;
291 uint32_t bclrpat_reg
;
295 uint32_t pipeconf_reg
;
296 uint32_t pipe_dsl_reg
;
298 enum drm_connector_status status
;
301 bclrpat_reg
= BCLRPAT_A
;
302 vtotal_reg
= VTOTAL_A
;
303 vblank_reg
= VBLANK_A
;
305 pipeconf_reg
= PIPEACONF
;
306 pipe_dsl_reg
= PIPEADSL
;
308 bclrpat_reg
= BCLRPAT_B
;
309 vtotal_reg
= VTOTAL_B
;
310 vblank_reg
= VBLANK_B
;
312 pipeconf_reg
= PIPEBCONF
;
313 pipe_dsl_reg
= PIPEBDSL
;
316 save_bclrpat
= I915_READ(bclrpat_reg
);
317 save_vtotal
= I915_READ(vtotal_reg
);
318 vblank
= I915_READ(vblank_reg
);
320 vtotal
= ((save_vtotal
>> 16) & 0xfff) + 1;
321 vactive
= (save_vtotal
& 0x7ff) + 1;
323 vblank_start
= (vblank
& 0xfff) + 1;
324 vblank_end
= ((vblank
>> 16) & 0xfff) + 1;
326 /* Set the border color to purple. */
327 I915_WRITE(bclrpat_reg
, 0x500050);
330 uint32_t pipeconf
= I915_READ(pipeconf_reg
);
331 I915_WRITE(pipeconf_reg
, pipeconf
| PIPECONF_FORCE_BORDER
);
332 /* Wait for next Vblank to substitue
333 * border color for Color info */
334 intel_wait_for_vblank(dev
);
335 st00
= I915_READ8(VGA_MSR_WRITE
);
336 status
= ((st00
& (1 << 4)) != 0) ?
337 connector_status_connected
:
338 connector_status_disconnected
;
340 I915_WRITE(pipeconf_reg
, pipeconf
);
342 bool restore_vblank
= false;
346 * If there isn't any border, add some.
347 * Yes, this will flicker
349 if (vblank_start
<= vactive
&& vblank_end
>= vtotal
) {
350 uint32_t vsync
= I915_READ(vsync_reg
);
351 uint32_t vsync_start
= (vsync
& 0xffff) + 1;
353 vblank_start
= vsync_start
;
354 I915_WRITE(vblank_reg
,
356 ((vblank_end
- 1) << 16));
357 restore_vblank
= true;
359 /* sample in the vertical border, selecting the larger one */
360 if (vblank_start
- vactive
>= vtotal
- vblank_end
)
361 vsample
= (vblank_start
+ vactive
) >> 1;
363 vsample
= (vtotal
+ vblank_end
) >> 1;
366 * Wait for the border to be displayed
368 while (I915_READ(pipe_dsl_reg
) >= vactive
)
370 while ((dsl
= I915_READ(pipe_dsl_reg
)) <= vsample
)
373 * Watch ST00 for an entire scanline
379 /* Read the ST00 VGA status register */
380 st00
= I915_READ8(VGA_MSR_WRITE
);
383 } while ((I915_READ(pipe_dsl_reg
) == dsl
));
385 /* restore vblank if necessary */
387 I915_WRITE(vblank_reg
, vblank
);
389 * If more than 3/4 of the scanline detected a monitor,
390 * then it is assumed to be present. This works even on i830,
391 * where there isn't any way to force the border color across
394 status
= detect
* 4 > count
* 3 ?
395 connector_status_connected
:
396 connector_status_disconnected
;
399 /* Restore previous settings */
400 I915_WRITE(bclrpat_reg
, save_bclrpat
);
405 static enum drm_connector_status
intel_crt_detect(struct drm_connector
*connector
)
407 struct drm_device
*dev
= connector
->dev
;
408 struct drm_encoder
*encoder
= intel_attached_encoder(connector
);
409 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
410 struct drm_crtc
*crtc
;
412 enum drm_connector_status status
;
414 if (IS_I9XX(dev
) && !IS_I915G(dev
) && !IS_I915GM(dev
)) {
415 if (intel_crt_detect_hotplug(connector
))
416 return connector_status_connected
;
418 return connector_status_disconnected
;
421 if (intel_crt_detect_ddc(encoder
))
422 return connector_status_connected
;
424 /* for pre-945g platforms use load detect */
425 if (encoder
->crtc
&& encoder
->crtc
->enabled
) {
426 status
= intel_crt_load_detect(encoder
->crtc
, intel_encoder
);
428 crtc
= intel_get_load_detect_pipe(intel_encoder
, connector
,
431 status
= intel_crt_load_detect(crtc
, intel_encoder
);
432 intel_release_load_detect_pipe(intel_encoder
,
433 connector
, dpms_mode
);
435 status
= connector_status_unknown
;
441 static void intel_crt_destroy(struct drm_connector
*connector
)
443 drm_sysfs_connector_remove(connector
);
444 drm_connector_cleanup(connector
);
448 static int intel_crt_get_modes(struct drm_connector
*connector
)
451 struct drm_encoder
*encoder
= intel_attached_encoder(connector
);
452 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
453 struct i2c_adapter
*ddc_bus
;
454 struct drm_device
*dev
= connector
->dev
;
457 ret
= intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
);
458 if (ret
|| !IS_G4X(dev
))
461 /* Try to probe digital port for output in DVI-I -> VGA mode. */
462 ddc_bus
= intel_i2c_create(connector
->dev
, GPIOD
, "CRTDDC_D");
465 dev_printk(KERN_ERR
, &connector
->dev
->pdev
->dev
,
466 "DDC bus registration failed for CRTDDC_D.\n");
469 /* Try to get modes by GPIOD port */
470 ret
= intel_ddc_get_modes(connector
, ddc_bus
);
471 intel_i2c_destroy(ddc_bus
);
478 static int intel_crt_set_property(struct drm_connector
*connector
,
479 struct drm_property
*property
,
486 * Routines for controlling stuff on the analog port
489 static const struct drm_encoder_helper_funcs intel_crt_helper_funcs
= {
490 .dpms
= intel_crt_dpms
,
491 .mode_fixup
= intel_crt_mode_fixup
,
492 .prepare
= intel_encoder_prepare
,
493 .commit
= intel_encoder_commit
,
494 .mode_set
= intel_crt_mode_set
,
497 static const struct drm_connector_funcs intel_crt_connector_funcs
= {
498 .dpms
= drm_helper_connector_dpms
,
499 .detect
= intel_crt_detect
,
500 .fill_modes
= drm_helper_probe_single_connector_modes
,
501 .destroy
= intel_crt_destroy
,
502 .set_property
= intel_crt_set_property
,
505 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs
= {
506 .mode_valid
= intel_crt_mode_valid
,
507 .get_modes
= intel_crt_get_modes
,
508 .best_encoder
= intel_attached_encoder
,
511 static void intel_crt_enc_destroy(struct drm_encoder
*encoder
)
513 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
515 intel_i2c_destroy(intel_encoder
->ddc_bus
);
516 drm_encoder_cleanup(encoder
);
517 kfree(intel_encoder
);
520 static const struct drm_encoder_funcs intel_crt_enc_funcs
= {
521 .destroy
= intel_crt_enc_destroy
,
524 void intel_crt_init(struct drm_device
*dev
)
526 struct drm_connector
*connector
;
527 struct intel_encoder
*intel_encoder
;
528 struct intel_connector
*intel_connector
;
529 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
532 intel_encoder
= kzalloc(sizeof(struct intel_encoder
), GFP_KERNEL
);
536 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
537 if (!intel_connector
) {
538 kfree(intel_encoder
);
542 connector
= &intel_connector
->base
;
543 drm_connector_init(dev
, &intel_connector
->base
,
544 &intel_crt_connector_funcs
, DRM_MODE_CONNECTOR_VGA
);
546 drm_encoder_init(dev
, &intel_encoder
->enc
, &intel_crt_enc_funcs
,
547 DRM_MODE_ENCODER_DAC
);
549 drm_mode_connector_attach_encoder(&intel_connector
->base
,
550 &intel_encoder
->enc
);
552 /* Set up the DDC bus. */
553 if (HAS_PCH_SPLIT(dev
))
557 /* Use VBT information for CRT DDC if available */
558 if (dev_priv
->crt_ddc_bus
!= 0)
559 i2c_reg
= dev_priv
->crt_ddc_bus
;
561 intel_encoder
->ddc_bus
= intel_i2c_create(dev
, i2c_reg
, "CRTDDC_A");
562 if (!intel_encoder
->ddc_bus
) {
563 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
568 intel_encoder
->type
= INTEL_OUTPUT_ANALOG
;
569 intel_encoder
->clone_mask
= (1 << INTEL_SDVO_NON_TV_CLONE_BIT
) |
570 (1 << INTEL_ANALOG_CLONE_BIT
) |
571 (1 << INTEL_SDVO_LVDS_CLONE_BIT
);
572 intel_encoder
->crtc_mask
= (1 << 0) | (1 << 1);
573 connector
->interlace_allowed
= 1;
574 connector
->doublescan_allowed
= 0;
576 drm_encoder_helper_add(&intel_encoder
->enc
, &intel_crt_helper_funcs
);
577 drm_connector_helper_add(connector
, &intel_crt_connector_helper_funcs
);
579 drm_sysfs_connector_add(connector
);
581 if (I915_HAS_HOTPLUG(dev
))
582 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
584 connector
->polled
= DRM_CONNECTOR_POLL_CONNECT
;
586 dev_priv
->hotplug_supported_mask
|= CRT_HOTPLUG_INT_STATUS
;