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 /* Make sure pre-965s set dither correctly */
265 if (INTEL_INFO(dev
)->gen
< 4) {
266 if (dev_priv
->lvds_dither
)
267 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
270 /* Native modes don't need fitting */
271 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
272 adjusted_mode
->vdisplay
== mode
->vdisplay
)
275 /* 965+ wants fuzzy fitting */
276 if (INTEL_INFO(dev
)->gen
>= 4)
277 pfit_control
|= ((intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
281 * Enable automatic panel scaling for non-native modes so that they fill
282 * the screen. Should be enabled before the pipe is enabled, according
283 * to register description and PRM.
284 * Change the value here to see the borders for debugging
286 I915_WRITE(BCLRPAT_A
, 0);
287 I915_WRITE(BCLRPAT_B
, 0);
289 switch (intel_lvds
->fitting_mode
) {
290 case DRM_MODE_SCALE_CENTER
:
292 * For centered modes, we have to calculate border widths &
293 * heights and modify the values programmed into the CRTC.
295 centre_horizontally(adjusted_mode
, mode
->hdisplay
);
296 centre_vertically(adjusted_mode
, mode
->vdisplay
);
297 border
= LVDS_BORDER_ENABLE
;
300 case DRM_MODE_SCALE_ASPECT
:
301 /* Scale but preserve the aspect ratio */
302 if (INTEL_INFO(dev
)->gen
>= 4) {
303 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
304 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
306 /* 965+ is easy, it does everything in hw */
307 if (scaled_width
> scaled_height
)
308 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_PILLAR
;
309 else if (scaled_width
< scaled_height
)
310 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_LETTER
;
311 else if (adjusted_mode
->hdisplay
!= mode
->hdisplay
)
312 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_AUTO
;
314 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
315 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
317 * For earlier chips we have to calculate the scaling
318 * ratio by hand and program it into the
319 * PFIT_PGM_RATIO register
321 if (scaled_width
> scaled_height
) { /* pillar */
322 centre_horizontally(adjusted_mode
, scaled_height
/ mode
->vdisplay
);
324 border
= LVDS_BORDER_ENABLE
;
325 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
) {
326 u32 bits
= panel_fitter_scaling(mode
->vdisplay
, adjusted_mode
->vdisplay
);
327 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
328 bits
<< PFIT_VERT_SCALE_SHIFT
);
329 pfit_control
|= (PFIT_ENABLE
|
330 VERT_INTERP_BILINEAR
|
331 HORIZ_INTERP_BILINEAR
);
333 } else if (scaled_width
< scaled_height
) { /* letter */
334 centre_vertically(adjusted_mode
, scaled_width
/ mode
->hdisplay
);
336 border
= LVDS_BORDER_ENABLE
;
337 if (mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
338 u32 bits
= panel_fitter_scaling(mode
->hdisplay
, adjusted_mode
->hdisplay
);
339 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
340 bits
<< PFIT_VERT_SCALE_SHIFT
);
341 pfit_control
|= (PFIT_ENABLE
|
342 VERT_INTERP_BILINEAR
|
343 HORIZ_INTERP_BILINEAR
);
346 /* Aspects match, Let hw scale both directions */
347 pfit_control
|= (PFIT_ENABLE
|
348 VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
349 VERT_INTERP_BILINEAR
|
350 HORIZ_INTERP_BILINEAR
);
354 case DRM_MODE_SCALE_FULLSCREEN
:
356 * Full scaling, even if it changes the aspect ratio.
357 * Fortunately this is all done for us in hw.
359 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
||
360 mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
361 pfit_control
|= PFIT_ENABLE
;
362 if (INTEL_INFO(dev
)->gen
>= 4)
363 pfit_control
|= PFIT_SCALING_AUTO
;
365 pfit_control
|= (VERT_AUTO_SCALE
|
366 VERT_INTERP_BILINEAR
|
368 HORIZ_INTERP_BILINEAR
);
377 if ((pfit_control
& PFIT_ENABLE
) == 0) {
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 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
476 enum drm_connector_status status
= connector_status_connected
;
478 /* Assume that the BIOS does not lie through the OpRegion... */
479 if (dev_priv
->opregion
.lid_state
)
480 return ioread32(dev_priv
->opregion
.lid_state
) & 0x1 ?
481 connector_status_connected
:
482 connector_status_disconnected
;
484 /* ACPI lid methods were generally unreliable in this generation, so
487 if (IS_GEN2(dev
) || IS_GEN3(dev
))
488 return connector_status_connected
;
494 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
496 static int intel_lvds_get_modes(struct drm_connector
*connector
)
498 struct intel_lvds
*intel_lvds
= intel_attached_lvds(connector
);
499 struct drm_device
*dev
= connector
->dev
;
500 struct drm_display_mode
*mode
;
502 if (intel_lvds
->edid
)
503 return drm_add_edid_modes(connector
, intel_lvds
->edid
);
505 mode
= drm_mode_duplicate(dev
, intel_lvds
->fixed_mode
);
509 drm_mode_probed_add(connector
, mode
);
513 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id
*id
)
515 DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id
->ident
);
519 /* The GPU hangs up on these systems if modeset is performed on LID open */
520 static const struct dmi_system_id intel_no_modeset_on_lid
[] = {
522 .callback
= intel_no_modeset_on_lid_dmi_callback
,
523 .ident
= "Toshiba Tecra A11",
525 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
526 DMI_MATCH(DMI_PRODUCT_NAME
, "TECRA A11"),
530 { } /* terminating entry */
534 * Lid events. Note the use of 'modeset_on_lid':
535 * - we set it on lid close, and reset it on open
536 * - we use it as a "only once" bit (ie we ignore
537 * duplicate events where it was already properly
539 * - the suspend/resume paths will also set it to
540 * zero, since they restore the mode ("lid open").
542 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
545 struct drm_i915_private
*dev_priv
=
546 container_of(nb
, struct drm_i915_private
, lid_notifier
);
547 struct drm_device
*dev
= dev_priv
->dev
;
548 struct drm_connector
*connector
= dev_priv
->int_lvds_connector
;
551 * check and update the status of LVDS connector after receiving
552 * the LID nofication event.
555 connector
->status
= connector
->funcs
->detect(connector
,
558 /* Don't force modeset on machines where it causes a GPU lockup */
559 if (dmi_check_system(intel_no_modeset_on_lid
))
561 if (!acpi_lid_open()) {
562 dev_priv
->modeset_on_lid
= 1;
566 if (!dev_priv
->modeset_on_lid
)
569 dev_priv
->modeset_on_lid
= 0;
571 mutex_lock(&dev
->mode_config
.mutex
);
572 drm_helper_resume_force_mode(dev
);
573 mutex_unlock(&dev
->mode_config
.mutex
);
579 * intel_lvds_destroy - unregister and free LVDS structures
580 * @connector: connector to free
582 * Unregister the DDC bus for this connector then free the driver private
585 static void intel_lvds_destroy(struct drm_connector
*connector
)
587 struct drm_device
*dev
= connector
->dev
;
588 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
590 if (dev_priv
->lid_notifier
.notifier_call
)
591 acpi_lid_notifier_unregister(&dev_priv
->lid_notifier
);
592 drm_sysfs_connector_remove(connector
);
593 drm_connector_cleanup(connector
);
597 static int intel_lvds_set_property(struct drm_connector
*connector
,
598 struct drm_property
*property
,
601 struct intel_lvds
*intel_lvds
= intel_attached_lvds(connector
);
602 struct drm_device
*dev
= connector
->dev
;
604 if (property
== dev
->mode_config
.scaling_mode_property
) {
605 struct drm_crtc
*crtc
= intel_lvds
->base
.base
.crtc
;
607 if (value
== DRM_MODE_SCALE_NONE
) {
608 DRM_DEBUG_KMS("no scaling not supported\n");
612 if (intel_lvds
->fitting_mode
== value
) {
613 /* the LVDS scaling property is not changed */
616 intel_lvds
->fitting_mode
= value
;
617 if (crtc
&& crtc
->enabled
) {
619 * If the CRTC is enabled, the display will be changed
620 * according to the new panel fitting mode.
622 drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
623 crtc
->x
, crtc
->y
, crtc
->fb
);
630 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
631 .dpms
= intel_lvds_dpms
,
632 .mode_fixup
= intel_lvds_mode_fixup
,
633 .prepare
= intel_lvds_prepare
,
634 .mode_set
= intel_lvds_mode_set
,
635 .commit
= intel_lvds_commit
,
638 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
639 .get_modes
= intel_lvds_get_modes
,
640 .mode_valid
= intel_lvds_mode_valid
,
641 .best_encoder
= intel_best_encoder
,
644 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
645 .dpms
= drm_helper_connector_dpms
,
646 .detect
= intel_lvds_detect
,
647 .fill_modes
= drm_helper_probe_single_connector_modes
,
648 .set_property
= intel_lvds_set_property
,
649 .destroy
= intel_lvds_destroy
,
652 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
653 .destroy
= intel_encoder_destroy
,
656 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
658 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id
->ident
);
662 /* These systems claim to have LVDS, but really don't */
663 static const struct dmi_system_id intel_no_lvds
[] = {
665 .callback
= intel_no_lvds_dmi_callback
,
666 .ident
= "Apple Mac Mini (Core series)",
668 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
669 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
673 .callback
= intel_no_lvds_dmi_callback
,
674 .ident
= "Apple Mac Mini (Core 2 series)",
676 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
677 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
681 .callback
= intel_no_lvds_dmi_callback
,
682 .ident
= "MSI IM-945GSE-A",
684 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
685 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
689 .callback
= intel_no_lvds_dmi_callback
,
690 .ident
= "Dell Studio Hybrid",
692 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
693 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
697 .callback
= intel_no_lvds_dmi_callback
,
698 .ident
= "AOpen Mini PC",
700 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
701 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
705 .callback
= intel_no_lvds_dmi_callback
,
706 .ident
= "AOpen Mini PC MP915",
708 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
709 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
713 .callback
= intel_no_lvds_dmi_callback
,
714 .ident
= "AOpen i915GMm-HFS",
716 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
717 DMI_MATCH(DMI_BOARD_NAME
, "i915GMm-HFS"),
721 .callback
= intel_no_lvds_dmi_callback
,
722 .ident
= "Aopen i945GTt-VFA",
724 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
728 .callback
= intel_no_lvds_dmi_callback
,
729 .ident
= "Clientron U800",
731 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
732 DMI_MATCH(DMI_PRODUCT_NAME
, "U800"),
736 { } /* terminating entry */
740 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
742 * @connector: LVDS connector
744 * Find the reduced downclock for LVDS in EDID.
746 static void intel_find_lvds_downclock(struct drm_device
*dev
,
747 struct drm_display_mode
*fixed_mode
,
748 struct drm_connector
*connector
)
750 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
751 struct drm_display_mode
*scan
;
754 temp_downclock
= fixed_mode
->clock
;
755 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
757 * If one mode has the same resolution with the fixed_panel
758 * mode while they have the different refresh rate, it means
759 * that the reduced downclock is found for the LVDS. In such
760 * case we can set the different FPx0/1 to dynamically select
761 * between low and high frequency.
763 if (scan
->hdisplay
== fixed_mode
->hdisplay
&&
764 scan
->hsync_start
== fixed_mode
->hsync_start
&&
765 scan
->hsync_end
== fixed_mode
->hsync_end
&&
766 scan
->htotal
== fixed_mode
->htotal
&&
767 scan
->vdisplay
== fixed_mode
->vdisplay
&&
768 scan
->vsync_start
== fixed_mode
->vsync_start
&&
769 scan
->vsync_end
== fixed_mode
->vsync_end
&&
770 scan
->vtotal
== fixed_mode
->vtotal
) {
771 if (scan
->clock
< temp_downclock
) {
773 * The downclock is already found. But we
774 * expect to find the lower downclock.
776 temp_downclock
= scan
->clock
;
780 if (temp_downclock
< fixed_mode
->clock
&& i915_lvds_downclock
) {
781 /* We found the downclock for LVDS. */
782 dev_priv
->lvds_downclock_avail
= 1;
783 dev_priv
->lvds_downclock
= temp_downclock
;
784 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
785 "Normal clock %dKhz, downclock %dKhz\n",
786 fixed_mode
->clock
, temp_downclock
);
791 * Enumerate the child dev array parsed from VBT to check whether
792 * the LVDS is present.
793 * If it is present, return 1.
794 * If it is not present, return false.
795 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
797 static bool lvds_is_present_in_vbt(struct drm_device
*dev
,
800 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
803 if (!dev_priv
->child_dev_num
)
806 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
807 struct child_device_config
*child
= dev_priv
->child_dev
+ i
;
809 /* If the device type is not LFP, continue.
810 * We have to check both the new identifiers as well as the
811 * old for compatibility with some BIOSes.
813 if (child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
814 child
->device_type
!= DEVICE_TYPE_LFP
)
818 *i2c_pin
= child
->i2c_pin
;
820 /* However, we cannot trust the BIOS writers to populate
821 * the VBT correctly. Since LVDS requires additional
822 * information from AIM blocks, a non-zero addin offset is
823 * a good indicator that the LVDS is actually present.
825 if (child
->addin_offset
)
828 /* But even then some BIOS writers perform some black magic
829 * and instantiate the device without reference to any
830 * additional data. Trust that if the VBT was written into
831 * the OpRegion then they have validated the LVDS's existence.
833 if (dev_priv
->opregion
.vbt
)
840 static bool intel_lvds_ddc_probe(struct drm_device
*dev
, u8 pin
)
842 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
844 struct i2c_msg msgs
[] = {
852 struct i2c_adapter
*i2c
= &dev_priv
->gmbus
[pin
].adapter
;
853 /* XXX this only appears to work when using GMBUS */
854 if (intel_gmbus_is_forced_bit(i2c
))
856 return i2c_transfer(i2c
, msgs
, 1) == 1;
860 * intel_lvds_init - setup LVDS connectors on this device
863 * Create the connector, register the LVDS DDC bus, and try to figure out what
864 * modes we can display on the LVDS panel (if present).
866 bool intel_lvds_init(struct drm_device
*dev
)
868 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
869 struct intel_lvds
*intel_lvds
;
870 struct intel_encoder
*intel_encoder
;
871 struct intel_connector
*intel_connector
;
872 struct drm_connector
*connector
;
873 struct drm_encoder
*encoder
;
874 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
875 struct drm_crtc
*crtc
;
880 /* Skip init on machines we know falsely report LVDS */
881 if (dmi_check_system(intel_no_lvds
))
884 pin
= GMBUS_PORT_PANEL
;
885 if (!lvds_is_present_in_vbt(dev
, &pin
)) {
886 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
890 if (HAS_PCH_SPLIT(dev
)) {
891 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
893 if (dev_priv
->edp
.support
) {
894 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
899 if (!intel_lvds_ddc_probe(dev
, pin
)) {
900 DRM_DEBUG_KMS("LVDS did not respond to DDC probe\n");
904 intel_lvds
= kzalloc(sizeof(struct intel_lvds
), GFP_KERNEL
);
909 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
910 if (!intel_connector
) {
915 if (!HAS_PCH_SPLIT(dev
)) {
916 intel_lvds
->pfit_control
= I915_READ(PFIT_CONTROL
);
919 intel_encoder
= &intel_lvds
->base
;
920 encoder
= &intel_encoder
->base
;
921 connector
= &intel_connector
->base
;
922 drm_connector_init(dev
, &intel_connector
->base
, &intel_lvds_connector_funcs
,
923 DRM_MODE_CONNECTOR_LVDS
);
925 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_lvds_enc_funcs
,
926 DRM_MODE_ENCODER_LVDS
);
928 intel_connector_attach_encoder(intel_connector
, intel_encoder
);
929 intel_encoder
->type
= INTEL_OUTPUT_LVDS
;
931 intel_encoder
->clone_mask
= (1 << INTEL_LVDS_CLONE_BIT
);
932 intel_encoder
->crtc_mask
= (1 << 1);
933 if (INTEL_INFO(dev
)->gen
>= 5)
934 intel_encoder
->crtc_mask
|= (1 << 0);
935 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
936 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
937 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
938 connector
->interlace_allowed
= false;
939 connector
->doublescan_allowed
= false;
941 /* create the scaling mode property */
942 drm_mode_create_scaling_mode_property(dev
);
944 * the initial panel fitting mode will be FULL_SCREEN.
947 drm_connector_attach_property(&intel_connector
->base
,
948 dev
->mode_config
.scaling_mode_property
,
949 DRM_MODE_SCALE_ASPECT
);
950 intel_lvds
->fitting_mode
= DRM_MODE_SCALE_ASPECT
;
953 * 1) check for EDID on DDC
954 * 2) check for VBT data
955 * 3) check to see if LVDS is already on
956 * if none of the above, no panel
957 * 4) make sure lid is open
958 * if closed, act like it's not there for now
962 * Attempt to get the fixed panel mode from DDC. Assume that the
963 * preferred mode is the right one.
965 intel_lvds
->edid
= drm_get_edid(connector
,
966 &dev_priv
->gmbus
[pin
].adapter
);
967 if (intel_lvds
->edid
) {
968 if (drm_add_edid_modes(connector
,
970 drm_mode_connector_update_edid_property(connector
,
973 kfree(intel_lvds
->edid
);
974 intel_lvds
->edid
= NULL
;
977 if (!intel_lvds
->edid
) {
978 /* Didn't get an EDID, so
979 * Set wide sync ranges so we get all modes
980 * handed to valid_mode for checking
982 connector
->display_info
.min_vfreq
= 0;
983 connector
->display_info
.max_vfreq
= 200;
984 connector
->display_info
.min_hfreq
= 0;
985 connector
->display_info
.max_hfreq
= 200;
988 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
989 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
990 intel_lvds
->fixed_mode
=
991 drm_mode_duplicate(dev
, scan
);
992 intel_find_lvds_downclock(dev
,
993 intel_lvds
->fixed_mode
,
999 /* Failed to get EDID, what about VBT? */
1000 if (dev_priv
->lfp_lvds_vbt_mode
) {
1001 intel_lvds
->fixed_mode
=
1002 drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
1003 if (intel_lvds
->fixed_mode
) {
1004 intel_lvds
->fixed_mode
->type
|=
1005 DRM_MODE_TYPE_PREFERRED
;
1011 * If we didn't get EDID, try checking if the panel is already turned
1012 * on. If so, assume that whatever is currently programmed is the
1016 /* Ironlake: FIXME if still fail, not try pipe mode now */
1017 if (HAS_PCH_SPLIT(dev
))
1020 lvds
= I915_READ(LVDS
);
1021 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
1022 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
1024 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
1025 intel_lvds
->fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
1026 if (intel_lvds
->fixed_mode
) {
1027 intel_lvds
->fixed_mode
->type
|=
1028 DRM_MODE_TYPE_PREFERRED
;
1033 /* If we still don't have a mode after all that, give up. */
1034 if (!intel_lvds
->fixed_mode
)
1038 if (HAS_PCH_SPLIT(dev
)) {
1041 pipe
= (I915_READ(PCH_LVDS
) & LVDS_PIPEB_SELECT
) ? 1 : 0;
1043 /* make sure PWM is enabled and locked to the LVDS pipe */
1044 pwm
= I915_READ(BLC_PWM_CPU_CTL2
);
1045 if (pipe
== 0 && (pwm
& PWM_PIPE_B
))
1046 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
& ~PWM_ENABLE
);
1051 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
| PWM_ENABLE
);
1053 pwm
= I915_READ(BLC_PWM_PCH_CTL1
);
1054 pwm
|= PWM_PCH_ENABLE
;
1055 I915_WRITE(BLC_PWM_PCH_CTL1
, pwm
);
1057 dev_priv
->lid_notifier
.notifier_call
= intel_lid_notify
;
1058 if (acpi_lid_notifier_register(&dev_priv
->lid_notifier
)) {
1059 DRM_DEBUG_KMS("lid notifier registration failed\n");
1060 dev_priv
->lid_notifier
.notifier_call
= NULL
;
1062 /* keep the LVDS connector */
1063 dev_priv
->int_lvds_connector
= connector
;
1064 drm_sysfs_connector_add(connector
);
1068 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1069 drm_connector_cleanup(connector
);
1070 drm_encoder_cleanup(encoder
);
1072 kfree(intel_connector
);