2 * Copyright © 2006-2007 Intel Corporation
3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Eric Anholt <eric@anholt.net>
26 * Dave Airlie <airlied@linux.ie>
27 * Jesse Barnes <jesse.barnes@intel.com>
30 #include <acpi/button.h>
31 #include <linux/dmi.h>
32 #include <linux/i2c.h>
33 #include <linux/slab.h>
38 #include "intel_drv.h"
41 #include <linux/acpi.h>
43 /* Private structure for the integrated LVDS support */
45 struct intel_encoder base
;
54 struct drm_display_mode
*fixed_mode
;
57 static struct intel_lvds
*to_intel_lvds(struct drm_encoder
*encoder
)
59 return container_of(encoder
, struct intel_lvds
, base
.base
);
62 static struct intel_lvds
*intel_attached_lvds(struct drm_connector
*connector
)
64 return container_of(intel_attached_encoder(connector
),
65 struct intel_lvds
, base
);
69 * Sets the power state for the panel.
71 static void intel_lvds_enable(struct intel_lvds
*intel_lvds
)
73 struct drm_device
*dev
= intel_lvds
->base
.base
.dev
;
74 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
75 u32 ctl_reg
, lvds_reg
;
77 if (HAS_PCH_SPLIT(dev
)) {
78 ctl_reg
= PCH_PP_CONTROL
;
85 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) | LVDS_PORT_EN
);
87 if (intel_lvds
->pfit_dirty
) {
89 * Enable automatic panel scaling so that non-native modes
90 * fill the screen. The panel fitter should only be
91 * adjusted whilst the pipe is disabled, according to
92 * register description and PRM.
94 DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
95 intel_lvds
->pfit_control
,
96 intel_lvds
->pfit_pgm_ratios
);
97 if (wait_for((I915_READ(PP_STATUS
) & PP_ON
) == 0, 1000)) {
98 DRM_ERROR("timed out waiting for panel to power off\n");
100 I915_WRITE(PFIT_PGM_RATIOS
, intel_lvds
->pfit_pgm_ratios
);
101 I915_WRITE(PFIT_CONTROL
, intel_lvds
->pfit_control
);
102 intel_lvds
->pfit_dirty
= false;
106 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) | POWER_TARGET_ON
);
107 POSTING_READ(lvds_reg
);
109 intel_panel_enable_backlight(dev
);
112 static void intel_lvds_disable(struct intel_lvds
*intel_lvds
)
114 struct drm_device
*dev
= intel_lvds
->base
.base
.dev
;
115 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
116 u32 ctl_reg
, lvds_reg
;
118 if (HAS_PCH_SPLIT(dev
)) {
119 ctl_reg
= PCH_PP_CONTROL
;
122 ctl_reg
= PP_CONTROL
;
126 intel_panel_disable_backlight(dev
);
128 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) & ~POWER_TARGET_ON
);
130 if (intel_lvds
->pfit_control
) {
131 if (wait_for((I915_READ(PP_STATUS
) & PP_ON
) == 0, 1000))
132 DRM_ERROR("timed out waiting for panel to power off\n");
134 I915_WRITE(PFIT_CONTROL
, 0);
135 intel_lvds
->pfit_dirty
= true;
138 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) & ~LVDS_PORT_EN
);
139 POSTING_READ(lvds_reg
);
142 static void intel_lvds_dpms(struct drm_encoder
*encoder
, int mode
)
144 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
146 if (mode
== DRM_MODE_DPMS_ON
)
147 intel_lvds_enable(intel_lvds
);
149 intel_lvds_disable(intel_lvds
);
151 /* XXX: We never power down the LVDS pairs. */
154 static int intel_lvds_mode_valid(struct drm_connector
*connector
,
155 struct drm_display_mode
*mode
)
157 struct intel_lvds
*intel_lvds
= intel_attached_lvds(connector
);
158 struct drm_display_mode
*fixed_mode
= intel_lvds
->fixed_mode
;
160 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
162 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
169 centre_horizontally(struct drm_display_mode
*mode
,
172 u32 border
, sync_pos
, blank_width
, sync_width
;
174 /* keep the hsync and hblank widths constant */
175 sync_width
= mode
->crtc_hsync_end
- mode
->crtc_hsync_start
;
176 blank_width
= mode
->crtc_hblank_end
- mode
->crtc_hblank_start
;
177 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
179 border
= (mode
->hdisplay
- width
+ 1) / 2;
180 border
+= border
& 1; /* make the border even */
182 mode
->crtc_hdisplay
= width
;
183 mode
->crtc_hblank_start
= width
+ border
;
184 mode
->crtc_hblank_end
= mode
->crtc_hblank_start
+ blank_width
;
186 mode
->crtc_hsync_start
= mode
->crtc_hblank_start
+ sync_pos
;
187 mode
->crtc_hsync_end
= mode
->crtc_hsync_start
+ sync_width
;
191 centre_vertically(struct drm_display_mode
*mode
,
194 u32 border
, sync_pos
, blank_width
, sync_width
;
196 /* keep the vsync and vblank widths constant */
197 sync_width
= mode
->crtc_vsync_end
- mode
->crtc_vsync_start
;
198 blank_width
= mode
->crtc_vblank_end
- mode
->crtc_vblank_start
;
199 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
201 border
= (mode
->vdisplay
- height
+ 1) / 2;
203 mode
->crtc_vdisplay
= height
;
204 mode
->crtc_vblank_start
= height
+ border
;
205 mode
->crtc_vblank_end
= mode
->crtc_vblank_start
+ blank_width
;
207 mode
->crtc_vsync_start
= mode
->crtc_vblank_start
+ sync_pos
;
208 mode
->crtc_vsync_end
= mode
->crtc_vsync_start
+ sync_width
;
211 static inline u32
panel_fitter_scaling(u32 source
, u32 target
)
214 * Floating point operation is not supported. So the FACTOR
215 * is defined, which can avoid the floating point computation
216 * when calculating the panel ratio.
219 #define FACTOR (1 << ACCURACY)
220 u32 ratio
= source
* FACTOR
/ target
;
221 return (FACTOR
* ratio
+ FACTOR
/2) / FACTOR
;
224 static bool intel_lvds_mode_fixup(struct drm_encoder
*encoder
,
225 struct drm_display_mode
*mode
,
226 struct drm_display_mode
*adjusted_mode
)
228 struct drm_device
*dev
= encoder
->dev
;
229 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
230 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->crtc
);
231 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
232 struct drm_encoder
*tmp_encoder
;
233 u32 pfit_control
= 0, pfit_pgm_ratios
= 0, border
= 0;
235 /* Should never happen!! */
236 if (INTEL_INFO(dev
)->gen
< 4 && intel_crtc
->pipe
== 0) {
237 DRM_ERROR("Can't support LVDS on pipe A\n");
241 /* Should never happen!! */
242 list_for_each_entry(tmp_encoder
, &dev
->mode_config
.encoder_list
, head
) {
243 if (tmp_encoder
!= encoder
&& tmp_encoder
->crtc
== encoder
->crtc
) {
244 DRM_ERROR("Can't enable LVDS and another "
245 "encoder on the same pipe\n");
251 * We have timings from the BIOS for the panel, put them in
252 * to the adjusted mode. The CRTC will be set up for this mode,
253 * with the panel scaling set up to source from the H/VDisplay
254 * of the original mode.
256 intel_fixed_panel_mode(intel_lvds
->fixed_mode
, adjusted_mode
);
258 if (HAS_PCH_SPLIT(dev
)) {
259 intel_pch_panel_fitting(dev
, intel_lvds
->fitting_mode
,
260 mode
, adjusted_mode
);
264 /* Native modes don't need fitting */
265 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
266 adjusted_mode
->vdisplay
== mode
->vdisplay
)
269 /* 965+ wants fuzzy fitting */
270 if (INTEL_INFO(dev
)->gen
>= 4)
271 pfit_control
|= ((intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
275 * Enable automatic panel scaling for non-native modes so that they fill
276 * the screen. Should be enabled before the pipe is enabled, according
277 * to register description and PRM.
278 * Change the value here to see the borders for debugging
280 I915_WRITE(BCLRPAT_A
, 0);
281 I915_WRITE(BCLRPAT_B
, 0);
283 switch (intel_lvds
->fitting_mode
) {
284 case DRM_MODE_SCALE_CENTER
:
286 * For centered modes, we have to calculate border widths &
287 * heights and modify the values programmed into the CRTC.
289 centre_horizontally(adjusted_mode
, mode
->hdisplay
);
290 centre_vertically(adjusted_mode
, mode
->vdisplay
);
291 border
= LVDS_BORDER_ENABLE
;
294 case DRM_MODE_SCALE_ASPECT
:
295 /* Scale but preserve the aspect ratio */
296 if (INTEL_INFO(dev
)->gen
>= 4) {
297 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
298 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
300 /* 965+ is easy, it does everything in hw */
301 if (scaled_width
> scaled_height
)
302 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_PILLAR
;
303 else if (scaled_width
< scaled_height
)
304 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_LETTER
;
305 else if (adjusted_mode
->hdisplay
!= mode
->hdisplay
)
306 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_AUTO
;
308 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
309 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
311 * For earlier chips we have to calculate the scaling
312 * ratio by hand and program it into the
313 * PFIT_PGM_RATIO register
315 if (scaled_width
> scaled_height
) { /* pillar */
316 centre_horizontally(adjusted_mode
, scaled_height
/ mode
->vdisplay
);
318 border
= LVDS_BORDER_ENABLE
;
319 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
) {
320 u32 bits
= panel_fitter_scaling(mode
->vdisplay
, adjusted_mode
->vdisplay
);
321 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
322 bits
<< PFIT_VERT_SCALE_SHIFT
);
323 pfit_control
|= (PFIT_ENABLE
|
324 VERT_INTERP_BILINEAR
|
325 HORIZ_INTERP_BILINEAR
);
327 } else if (scaled_width
< scaled_height
) { /* letter */
328 centre_vertically(adjusted_mode
, scaled_width
/ mode
->hdisplay
);
330 border
= LVDS_BORDER_ENABLE
;
331 if (mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
332 u32 bits
= panel_fitter_scaling(mode
->hdisplay
, adjusted_mode
->hdisplay
);
333 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
334 bits
<< PFIT_VERT_SCALE_SHIFT
);
335 pfit_control
|= (PFIT_ENABLE
|
336 VERT_INTERP_BILINEAR
|
337 HORIZ_INTERP_BILINEAR
);
340 /* Aspects match, Let hw scale both directions */
341 pfit_control
|= (PFIT_ENABLE
|
342 VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
343 VERT_INTERP_BILINEAR
|
344 HORIZ_INTERP_BILINEAR
);
348 case DRM_MODE_SCALE_FULLSCREEN
:
350 * Full scaling, even if it changes the aspect ratio.
351 * Fortunately this is all done for us in hw.
353 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
||
354 mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
355 pfit_control
|= PFIT_ENABLE
;
356 if (INTEL_INFO(dev
)->gen
>= 4)
357 pfit_control
|= PFIT_SCALING_AUTO
;
359 pfit_control
|= (VERT_AUTO_SCALE
|
360 VERT_INTERP_BILINEAR
|
362 HORIZ_INTERP_BILINEAR
);
371 /* If not enabling scaling, be consistent and always use 0. */
372 if ((pfit_control
& PFIT_ENABLE
) == 0) {
377 /* Make sure pre-965 set dither correctly */
378 if (INTEL_INFO(dev
)->gen
< 4 && dev_priv
->lvds_dither
)
379 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
381 if (pfit_control
!= intel_lvds
->pfit_control
||
382 pfit_pgm_ratios
!= intel_lvds
->pfit_pgm_ratios
) {
383 intel_lvds
->pfit_control
= pfit_control
;
384 intel_lvds
->pfit_pgm_ratios
= pfit_pgm_ratios
;
385 intel_lvds
->pfit_dirty
= true;
387 dev_priv
->lvds_border_bits
= border
;
390 * XXX: It would be nice to support lower refresh rates on the
391 * panels to reduce power consumption, and perhaps match the
392 * user's requested refresh rate.
398 static void intel_lvds_prepare(struct drm_encoder
*encoder
)
400 struct drm_device
*dev
= encoder
->dev
;
401 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
402 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
404 /* We try to do the minimum that is necessary in order to unlock
405 * the registers for mode setting.
407 * On Ironlake, this is quite simple as we just set the unlock key
408 * and ignore all subtleties. (This may cause some issues...)
410 * Prior to Ironlake, we must disable the pipe if we want to adjust
411 * the panel fitter. However at all other times we can just reset
412 * the registers regardless.
415 if (HAS_PCH_SPLIT(dev
)) {
416 I915_WRITE(PCH_PP_CONTROL
,
417 I915_READ(PCH_PP_CONTROL
) | PANEL_UNLOCK_REGS
);
418 } else if (intel_lvds
->pfit_dirty
) {
419 I915_WRITE(PP_CONTROL
,
420 (I915_READ(PP_CONTROL
) | PANEL_UNLOCK_REGS
)
423 I915_WRITE(PP_CONTROL
,
424 I915_READ(PP_CONTROL
) | PANEL_UNLOCK_REGS
);
428 static void intel_lvds_commit(struct drm_encoder
*encoder
)
430 struct drm_device
*dev
= encoder
->dev
;
431 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
432 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
434 /* Undo any unlocking done in prepare to prevent accidental
435 * adjustment of the registers.
437 if (HAS_PCH_SPLIT(dev
)) {
438 u32 val
= I915_READ(PCH_PP_CONTROL
);
439 if ((val
& PANEL_UNLOCK_REGS
) == PANEL_UNLOCK_REGS
)
440 I915_WRITE(PCH_PP_CONTROL
, val
& 0x3);
442 u32 val
= I915_READ(PP_CONTROL
);
443 if ((val
& PANEL_UNLOCK_REGS
) == PANEL_UNLOCK_REGS
)
444 I915_WRITE(PP_CONTROL
, val
& 0x3);
447 /* Always do a full power on as we do not know what state
450 intel_lvds_enable(intel_lvds
);
453 static void intel_lvds_mode_set(struct drm_encoder
*encoder
,
454 struct drm_display_mode
*mode
,
455 struct drm_display_mode
*adjusted_mode
)
458 * The LVDS pin pair will already have been turned on in the
459 * intel_crtc_mode_set since it has a large impact on the DPLL
465 * Detect the LVDS connection.
467 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
468 * connected and closed means disconnected. We also send hotplug events as
469 * needed, using lid status notification from the input layer.
471 static enum drm_connector_status
472 intel_lvds_detect(struct drm_connector
*connector
, bool force
)
474 struct drm_device
*dev
= connector
->dev
;
475 enum drm_connector_status status
= connector_status_connected
;
477 /* ACPI lid methods were generally unreliable in this generation, so
480 if (IS_GEN2(dev
) || IS_GEN3(dev
))
481 return connector_status_connected
;
487 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
489 static int intel_lvds_get_modes(struct drm_connector
*connector
)
491 struct intel_lvds
*intel_lvds
= intel_attached_lvds(connector
);
492 struct drm_device
*dev
= connector
->dev
;
493 struct drm_display_mode
*mode
;
495 if (intel_lvds
->edid
)
496 return drm_add_edid_modes(connector
, intel_lvds
->edid
);
498 mode
= drm_mode_duplicate(dev
, intel_lvds
->fixed_mode
);
502 drm_mode_probed_add(connector
, mode
);
506 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id
*id
)
508 DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id
->ident
);
512 /* The GPU hangs up on these systems if modeset is performed on LID open */
513 static const struct dmi_system_id intel_no_modeset_on_lid
[] = {
515 .callback
= intel_no_modeset_on_lid_dmi_callback
,
516 .ident
= "Toshiba Tecra A11",
518 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
519 DMI_MATCH(DMI_PRODUCT_NAME
, "TECRA A11"),
523 { } /* terminating entry */
527 * Lid events. Note the use of 'modeset_on_lid':
528 * - we set it on lid close, and reset it on open
529 * - we use it as a "only once" bit (ie we ignore
530 * duplicate events where it was already properly
532 * - the suspend/resume paths will also set it to
533 * zero, since they restore the mode ("lid open").
535 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
538 struct drm_i915_private
*dev_priv
=
539 container_of(nb
, struct drm_i915_private
, lid_notifier
);
540 struct drm_device
*dev
= dev_priv
->dev
;
541 struct drm_connector
*connector
= dev_priv
->int_lvds_connector
;
544 * check and update the status of LVDS connector after receiving
545 * the LID nofication event.
548 connector
->status
= connector
->funcs
->detect(connector
,
551 /* Don't force modeset on machines where it causes a GPU lockup */
552 if (dmi_check_system(intel_no_modeset_on_lid
))
554 if (!acpi_lid_open()) {
555 dev_priv
->modeset_on_lid
= 1;
559 if (!dev_priv
->modeset_on_lid
)
562 dev_priv
->modeset_on_lid
= 0;
564 mutex_lock(&dev
->mode_config
.mutex
);
565 drm_helper_resume_force_mode(dev
);
566 mutex_unlock(&dev
->mode_config
.mutex
);
572 * intel_lvds_destroy - unregister and free LVDS structures
573 * @connector: connector to free
575 * Unregister the DDC bus for this connector then free the driver private
578 static void intel_lvds_destroy(struct drm_connector
*connector
)
580 struct drm_device
*dev
= connector
->dev
;
581 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
583 if (dev_priv
->lid_notifier
.notifier_call
)
584 acpi_lid_notifier_unregister(&dev_priv
->lid_notifier
);
585 drm_sysfs_connector_remove(connector
);
586 drm_connector_cleanup(connector
);
590 static int intel_lvds_set_property(struct drm_connector
*connector
,
591 struct drm_property
*property
,
594 struct intel_lvds
*intel_lvds
= intel_attached_lvds(connector
);
595 struct drm_device
*dev
= connector
->dev
;
597 if (property
== dev
->mode_config
.scaling_mode_property
) {
598 struct drm_crtc
*crtc
= intel_lvds
->base
.base
.crtc
;
600 if (value
== DRM_MODE_SCALE_NONE
) {
601 DRM_DEBUG_KMS("no scaling not supported\n");
605 if (intel_lvds
->fitting_mode
== value
) {
606 /* the LVDS scaling property is not changed */
609 intel_lvds
->fitting_mode
= value
;
610 if (crtc
&& crtc
->enabled
) {
612 * If the CRTC is enabled, the display will be changed
613 * according to the new panel fitting mode.
615 drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
616 crtc
->x
, crtc
->y
, crtc
->fb
);
623 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
624 .dpms
= intel_lvds_dpms
,
625 .mode_fixup
= intel_lvds_mode_fixup
,
626 .prepare
= intel_lvds_prepare
,
627 .mode_set
= intel_lvds_mode_set
,
628 .commit
= intel_lvds_commit
,
631 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
632 .get_modes
= intel_lvds_get_modes
,
633 .mode_valid
= intel_lvds_mode_valid
,
634 .best_encoder
= intel_best_encoder
,
637 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
638 .dpms
= drm_helper_connector_dpms
,
639 .detect
= intel_lvds_detect
,
640 .fill_modes
= drm_helper_probe_single_connector_modes
,
641 .set_property
= intel_lvds_set_property
,
642 .destroy
= intel_lvds_destroy
,
645 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
646 .destroy
= intel_encoder_destroy
,
649 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
651 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id
->ident
);
655 /* These systems claim to have LVDS, but really don't */
656 static const struct dmi_system_id intel_no_lvds
[] = {
658 .callback
= intel_no_lvds_dmi_callback
,
659 .ident
= "Apple Mac Mini (Core series)",
661 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
662 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
666 .callback
= intel_no_lvds_dmi_callback
,
667 .ident
= "Apple Mac Mini (Core 2 series)",
669 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
670 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
674 .callback
= intel_no_lvds_dmi_callback
,
675 .ident
= "MSI IM-945GSE-A",
677 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
678 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
682 .callback
= intel_no_lvds_dmi_callback
,
683 .ident
= "Dell Studio Hybrid",
685 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
686 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
690 .callback
= intel_no_lvds_dmi_callback
,
691 .ident
= "AOpen Mini PC",
693 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
694 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
698 .callback
= intel_no_lvds_dmi_callback
,
699 .ident
= "AOpen Mini PC MP915",
701 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
702 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
706 .callback
= intel_no_lvds_dmi_callback
,
707 .ident
= "AOpen i915GMm-HFS",
709 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
710 DMI_MATCH(DMI_BOARD_NAME
, "i915GMm-HFS"),
714 .callback
= intel_no_lvds_dmi_callback
,
715 .ident
= "Aopen i945GTt-VFA",
717 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
721 .callback
= intel_no_lvds_dmi_callback
,
722 .ident
= "Clientron U800",
724 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
725 DMI_MATCH(DMI_PRODUCT_NAME
, "U800"),
729 { } /* terminating entry */
733 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
735 * @connector: LVDS connector
737 * Find the reduced downclock for LVDS in EDID.
739 static void intel_find_lvds_downclock(struct drm_device
*dev
,
740 struct drm_display_mode
*fixed_mode
,
741 struct drm_connector
*connector
)
743 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
744 struct drm_display_mode
*scan
;
747 temp_downclock
= fixed_mode
->clock
;
748 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
750 * If one mode has the same resolution with the fixed_panel
751 * mode while they have the different refresh rate, it means
752 * that the reduced downclock is found for the LVDS. In such
753 * case we can set the different FPx0/1 to dynamically select
754 * between low and high frequency.
756 if (scan
->hdisplay
== fixed_mode
->hdisplay
&&
757 scan
->hsync_start
== fixed_mode
->hsync_start
&&
758 scan
->hsync_end
== fixed_mode
->hsync_end
&&
759 scan
->htotal
== fixed_mode
->htotal
&&
760 scan
->vdisplay
== fixed_mode
->vdisplay
&&
761 scan
->vsync_start
== fixed_mode
->vsync_start
&&
762 scan
->vsync_end
== fixed_mode
->vsync_end
&&
763 scan
->vtotal
== fixed_mode
->vtotal
) {
764 if (scan
->clock
< temp_downclock
) {
766 * The downclock is already found. But we
767 * expect to find the lower downclock.
769 temp_downclock
= scan
->clock
;
773 if (temp_downclock
< fixed_mode
->clock
&& i915_lvds_downclock
) {
774 /* We found the downclock for LVDS. */
775 dev_priv
->lvds_downclock_avail
= 1;
776 dev_priv
->lvds_downclock
= temp_downclock
;
777 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
778 "Normal clock %dKhz, downclock %dKhz\n",
779 fixed_mode
->clock
, temp_downclock
);
784 * Enumerate the child dev array parsed from VBT to check whether
785 * the LVDS is present.
786 * If it is present, return 1.
787 * If it is not present, return false.
788 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
790 static bool lvds_is_present_in_vbt(struct drm_device
*dev
,
793 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
796 if (!dev_priv
->child_dev_num
)
799 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
800 struct child_device_config
*child
= dev_priv
->child_dev
+ i
;
802 /* If the device type is not LFP, continue.
803 * We have to check both the new identifiers as well as the
804 * old for compatibility with some BIOSes.
806 if (child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
807 child
->device_type
!= DEVICE_TYPE_LFP
)
811 *i2c_pin
= child
->i2c_pin
;
813 /* However, we cannot trust the BIOS writers to populate
814 * the VBT correctly. Since LVDS requires additional
815 * information from AIM blocks, a non-zero addin offset is
816 * a good indicator that the LVDS is actually present.
818 if (child
->addin_offset
)
821 /* But even then some BIOS writers perform some black magic
822 * and instantiate the device without reference to any
823 * additional data. Trust that if the VBT was written into
824 * the OpRegion then they have validated the LVDS's existence.
826 if (dev_priv
->opregion
.vbt
)
833 static bool intel_lvds_ddc_probe(struct drm_device
*dev
, u8 pin
)
835 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
837 struct i2c_msg msgs
[] = {
845 struct i2c_adapter
*i2c
= &dev_priv
->gmbus
[pin
].adapter
;
846 /* XXX this only appears to work when using GMBUS */
847 if (intel_gmbus_is_forced_bit(i2c
))
849 return i2c_transfer(i2c
, msgs
, 1) == 1;
853 * intel_lvds_init - setup LVDS connectors on this device
856 * Create the connector, register the LVDS DDC bus, and try to figure out what
857 * modes we can display on the LVDS panel (if present).
859 bool intel_lvds_init(struct drm_device
*dev
)
861 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
862 struct intel_lvds
*intel_lvds
;
863 struct intel_encoder
*intel_encoder
;
864 struct intel_connector
*intel_connector
;
865 struct drm_connector
*connector
;
866 struct drm_encoder
*encoder
;
867 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
868 struct drm_crtc
*crtc
;
873 /* Skip init on machines we know falsely report LVDS */
874 if (dmi_check_system(intel_no_lvds
))
877 pin
= GMBUS_PORT_PANEL
;
878 if (!lvds_is_present_in_vbt(dev
, &pin
)) {
879 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
883 if (HAS_PCH_SPLIT(dev
)) {
884 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
886 if (dev_priv
->edp
.support
) {
887 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
892 if (!intel_lvds_ddc_probe(dev
, pin
)) {
893 DRM_DEBUG_KMS("LVDS did not respond to DDC probe\n");
897 intel_lvds
= kzalloc(sizeof(struct intel_lvds
), GFP_KERNEL
);
902 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
903 if (!intel_connector
) {
908 if (!HAS_PCH_SPLIT(dev
)) {
909 intel_lvds
->pfit_control
= I915_READ(PFIT_CONTROL
);
912 intel_encoder
= &intel_lvds
->base
;
913 encoder
= &intel_encoder
->base
;
914 connector
= &intel_connector
->base
;
915 drm_connector_init(dev
, &intel_connector
->base
, &intel_lvds_connector_funcs
,
916 DRM_MODE_CONNECTOR_LVDS
);
918 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_lvds_enc_funcs
,
919 DRM_MODE_ENCODER_LVDS
);
921 intel_connector_attach_encoder(intel_connector
, intel_encoder
);
922 intel_encoder
->type
= INTEL_OUTPUT_LVDS
;
924 intel_encoder
->clone_mask
= (1 << INTEL_LVDS_CLONE_BIT
);
925 intel_encoder
->crtc_mask
= (1 << 1);
926 if (INTEL_INFO(dev
)->gen
>= 5)
927 intel_encoder
->crtc_mask
|= (1 << 0);
928 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
929 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
930 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
931 connector
->interlace_allowed
= false;
932 connector
->doublescan_allowed
= false;
934 /* create the scaling mode property */
935 drm_mode_create_scaling_mode_property(dev
);
937 * the initial panel fitting mode will be FULL_SCREEN.
940 drm_connector_attach_property(&intel_connector
->base
,
941 dev
->mode_config
.scaling_mode_property
,
942 DRM_MODE_SCALE_ASPECT
);
943 intel_lvds
->fitting_mode
= DRM_MODE_SCALE_ASPECT
;
946 * 1) check for EDID on DDC
947 * 2) check for VBT data
948 * 3) check to see if LVDS is already on
949 * if none of the above, no panel
950 * 4) make sure lid is open
951 * if closed, act like it's not there for now
955 * Attempt to get the fixed panel mode from DDC. Assume that the
956 * preferred mode is the right one.
958 intel_lvds
->edid
= drm_get_edid(connector
,
959 &dev_priv
->gmbus
[pin
].adapter
);
960 if (intel_lvds
->edid
) {
961 if (drm_add_edid_modes(connector
,
963 drm_mode_connector_update_edid_property(connector
,
966 kfree(intel_lvds
->edid
);
967 intel_lvds
->edid
= NULL
;
970 if (!intel_lvds
->edid
) {
971 /* Didn't get an EDID, so
972 * Set wide sync ranges so we get all modes
973 * handed to valid_mode for checking
975 connector
->display_info
.min_vfreq
= 0;
976 connector
->display_info
.max_vfreq
= 200;
977 connector
->display_info
.min_hfreq
= 0;
978 connector
->display_info
.max_hfreq
= 200;
981 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
982 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
983 intel_lvds
->fixed_mode
=
984 drm_mode_duplicate(dev
, scan
);
985 intel_find_lvds_downclock(dev
,
986 intel_lvds
->fixed_mode
,
992 /* Failed to get EDID, what about VBT? */
993 if (dev_priv
->lfp_lvds_vbt_mode
) {
994 intel_lvds
->fixed_mode
=
995 drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
996 if (intel_lvds
->fixed_mode
) {
997 intel_lvds
->fixed_mode
->type
|=
998 DRM_MODE_TYPE_PREFERRED
;
1004 * If we didn't get EDID, try checking if the panel is already turned
1005 * on. If so, assume that whatever is currently programmed is the
1009 /* Ironlake: FIXME if still fail, not try pipe mode now */
1010 if (HAS_PCH_SPLIT(dev
))
1013 lvds
= I915_READ(LVDS
);
1014 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
1015 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
1017 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
1018 intel_lvds
->fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
1019 if (intel_lvds
->fixed_mode
) {
1020 intel_lvds
->fixed_mode
->type
|=
1021 DRM_MODE_TYPE_PREFERRED
;
1026 /* If we still don't have a mode after all that, give up. */
1027 if (!intel_lvds
->fixed_mode
)
1031 if (HAS_PCH_SPLIT(dev
)) {
1034 pipe
= (I915_READ(PCH_LVDS
) & LVDS_PIPEB_SELECT
) ? 1 : 0;
1036 /* make sure PWM is enabled and locked to the LVDS pipe */
1037 pwm
= I915_READ(BLC_PWM_CPU_CTL2
);
1038 if (pipe
== 0 && (pwm
& PWM_PIPE_B
))
1039 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
& ~PWM_ENABLE
);
1044 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
| PWM_ENABLE
);
1046 pwm
= I915_READ(BLC_PWM_PCH_CTL1
);
1047 pwm
|= PWM_PCH_ENABLE
;
1048 I915_WRITE(BLC_PWM_PCH_CTL1
, pwm
);
1050 dev_priv
->lid_notifier
.notifier_call
= intel_lid_notify
;
1051 if (acpi_lid_notifier_register(&dev_priv
->lid_notifier
)) {
1052 DRM_DEBUG_KMS("lid notifier registration failed\n");
1053 dev_priv
->lid_notifier
.notifier_call
= NULL
;
1055 /* keep the LVDS connector */
1056 dev_priv
->int_lvds_connector
= connector
;
1057 drm_sysfs_connector_add(connector
);
1061 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1062 drm_connector_cleanup(connector
);
1063 drm_encoder_cleanup(encoder
);
1065 kfree(intel_connector
);