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
, stat_reg
;
77 if (HAS_PCH_SPLIT(dev
)) {
78 ctl_reg
= PCH_PP_CONTROL
;
80 stat_reg
= PCH_PP_STATUS
;
87 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) | LVDS_PORT_EN
);
89 if (intel_lvds
->pfit_dirty
) {
91 * Enable automatic panel scaling so that non-native modes
92 * fill the screen. The panel fitter should only be
93 * adjusted whilst the pipe is disabled, according to
94 * register description and PRM.
96 DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
97 intel_lvds
->pfit_control
,
98 intel_lvds
->pfit_pgm_ratios
);
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;
105 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) | POWER_TARGET_ON
);
106 POSTING_READ(lvds_reg
);
107 if (wait_for((I915_READ(stat_reg
) & PP_ON
) != 0, 1000))
108 DRM_ERROR("timed out waiting for panel to power on\n");
110 intel_panel_enable_backlight(dev
);
113 static void intel_lvds_disable(struct intel_lvds
*intel_lvds
)
115 struct drm_device
*dev
= intel_lvds
->base
.base
.dev
;
116 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
117 u32 ctl_reg
, lvds_reg
, stat_reg
;
119 if (HAS_PCH_SPLIT(dev
)) {
120 ctl_reg
= PCH_PP_CONTROL
;
122 stat_reg
= PCH_PP_STATUS
;
124 ctl_reg
= PP_CONTROL
;
126 stat_reg
= PP_STATUS
;
129 intel_panel_disable_backlight(dev
);
131 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) & ~POWER_TARGET_ON
);
132 if (wait_for((I915_READ(stat_reg
) & PP_ON
) == 0, 1000))
133 DRM_ERROR("timed out waiting for panel to power off\n");
135 if (intel_lvds
->pfit_control
) {
136 I915_WRITE(PFIT_CONTROL
, 0);
137 intel_lvds
->pfit_dirty
= true;
140 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) & ~LVDS_PORT_EN
);
141 POSTING_READ(lvds_reg
);
144 static void intel_lvds_dpms(struct drm_encoder
*encoder
, int mode
)
146 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
148 if (mode
== DRM_MODE_DPMS_ON
)
149 intel_lvds_enable(intel_lvds
);
151 intel_lvds_disable(intel_lvds
);
153 /* XXX: We never power down the LVDS pairs. */
156 static int intel_lvds_mode_valid(struct drm_connector
*connector
,
157 struct drm_display_mode
*mode
)
159 struct intel_lvds
*intel_lvds
= intel_attached_lvds(connector
);
160 struct drm_display_mode
*fixed_mode
= intel_lvds
->fixed_mode
;
162 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
164 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
171 centre_horizontally(struct drm_display_mode
*mode
,
174 u32 border
, sync_pos
, blank_width
, sync_width
;
176 /* keep the hsync and hblank widths constant */
177 sync_width
= mode
->crtc_hsync_end
- mode
->crtc_hsync_start
;
178 blank_width
= mode
->crtc_hblank_end
- mode
->crtc_hblank_start
;
179 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
181 border
= (mode
->hdisplay
- width
+ 1) / 2;
182 border
+= border
& 1; /* make the border even */
184 mode
->crtc_hdisplay
= width
;
185 mode
->crtc_hblank_start
= width
+ border
;
186 mode
->crtc_hblank_end
= mode
->crtc_hblank_start
+ blank_width
;
188 mode
->crtc_hsync_start
= mode
->crtc_hblank_start
+ sync_pos
;
189 mode
->crtc_hsync_end
= mode
->crtc_hsync_start
+ sync_width
;
193 centre_vertically(struct drm_display_mode
*mode
,
196 u32 border
, sync_pos
, blank_width
, sync_width
;
198 /* keep the vsync and vblank widths constant */
199 sync_width
= mode
->crtc_vsync_end
- mode
->crtc_vsync_start
;
200 blank_width
= mode
->crtc_vblank_end
- mode
->crtc_vblank_start
;
201 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
203 border
= (mode
->vdisplay
- height
+ 1) / 2;
205 mode
->crtc_vdisplay
= height
;
206 mode
->crtc_vblank_start
= height
+ border
;
207 mode
->crtc_vblank_end
= mode
->crtc_vblank_start
+ blank_width
;
209 mode
->crtc_vsync_start
= mode
->crtc_vblank_start
+ sync_pos
;
210 mode
->crtc_vsync_end
= mode
->crtc_vsync_start
+ sync_width
;
213 static inline u32
panel_fitter_scaling(u32 source
, u32 target
)
216 * Floating point operation is not supported. So the FACTOR
217 * is defined, which can avoid the floating point computation
218 * when calculating the panel ratio.
221 #define FACTOR (1 << ACCURACY)
222 u32 ratio
= source
* FACTOR
/ target
;
223 return (FACTOR
* ratio
+ FACTOR
/2) / FACTOR
;
226 static bool intel_lvds_mode_fixup(struct drm_encoder
*encoder
,
227 struct drm_display_mode
*mode
,
228 struct drm_display_mode
*adjusted_mode
)
230 struct drm_device
*dev
= encoder
->dev
;
231 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
232 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->crtc
);
233 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
234 struct drm_encoder
*tmp_encoder
;
235 u32 pfit_control
= 0, pfit_pgm_ratios
= 0, border
= 0;
238 /* Should never happen!! */
239 if (INTEL_INFO(dev
)->gen
< 4 && intel_crtc
->pipe
== 0) {
240 DRM_ERROR("Can't support LVDS on pipe A\n");
244 /* Should never happen!! */
245 list_for_each_entry(tmp_encoder
, &dev
->mode_config
.encoder_list
, head
) {
246 if (tmp_encoder
!= encoder
&& tmp_encoder
->crtc
== encoder
->crtc
) {
247 DRM_ERROR("Can't enable LVDS and another "
248 "encoder on the same pipe\n");
254 * We have timings from the BIOS for the panel, put them in
255 * to the adjusted mode. The CRTC will be set up for this mode,
256 * with the panel scaling set up to source from the H/VDisplay
257 * of the original mode.
259 intel_fixed_panel_mode(intel_lvds
->fixed_mode
, adjusted_mode
);
261 if (HAS_PCH_SPLIT(dev
)) {
262 intel_pch_panel_fitting(dev
, intel_lvds
->fitting_mode
,
263 mode
, adjusted_mode
);
267 /* Native modes don't need fitting */
268 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
269 adjusted_mode
->vdisplay
== mode
->vdisplay
)
272 /* 965+ wants fuzzy fitting */
273 if (INTEL_INFO(dev
)->gen
>= 4)
274 pfit_control
|= ((intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
278 * Enable automatic panel scaling for non-native modes so that they fill
279 * the screen. Should be enabled before the pipe is enabled, according
280 * to register description and PRM.
281 * Change the value here to see the borders for debugging
284 I915_WRITE(BCLRPAT(pipe
), 0);
286 switch (intel_lvds
->fitting_mode
) {
287 case DRM_MODE_SCALE_CENTER
:
289 * For centered modes, we have to calculate border widths &
290 * heights and modify the values programmed into the CRTC.
292 centre_horizontally(adjusted_mode
, mode
->hdisplay
);
293 centre_vertically(adjusted_mode
, mode
->vdisplay
);
294 border
= LVDS_BORDER_ENABLE
;
297 case DRM_MODE_SCALE_ASPECT
:
298 /* Scale but preserve the aspect ratio */
299 if (INTEL_INFO(dev
)->gen
>= 4) {
300 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
301 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
303 /* 965+ is easy, it does everything in hw */
304 if (scaled_width
> scaled_height
)
305 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_PILLAR
;
306 else if (scaled_width
< scaled_height
)
307 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_LETTER
;
308 else if (adjusted_mode
->hdisplay
!= mode
->hdisplay
)
309 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_AUTO
;
311 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
312 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
314 * For earlier chips we have to calculate the scaling
315 * ratio by hand and program it into the
316 * PFIT_PGM_RATIO register
318 if (scaled_width
> scaled_height
) { /* pillar */
319 centre_horizontally(adjusted_mode
, scaled_height
/ mode
->vdisplay
);
321 border
= LVDS_BORDER_ENABLE
;
322 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
) {
323 u32 bits
= panel_fitter_scaling(mode
->vdisplay
, adjusted_mode
->vdisplay
);
324 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
325 bits
<< PFIT_VERT_SCALE_SHIFT
);
326 pfit_control
|= (PFIT_ENABLE
|
327 VERT_INTERP_BILINEAR
|
328 HORIZ_INTERP_BILINEAR
);
330 } else if (scaled_width
< scaled_height
) { /* letter */
331 centre_vertically(adjusted_mode
, scaled_width
/ mode
->hdisplay
);
333 border
= LVDS_BORDER_ENABLE
;
334 if (mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
335 u32 bits
= panel_fitter_scaling(mode
->hdisplay
, adjusted_mode
->hdisplay
);
336 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
337 bits
<< PFIT_VERT_SCALE_SHIFT
);
338 pfit_control
|= (PFIT_ENABLE
|
339 VERT_INTERP_BILINEAR
|
340 HORIZ_INTERP_BILINEAR
);
343 /* Aspects match, Let hw scale both directions */
344 pfit_control
|= (PFIT_ENABLE
|
345 VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
346 VERT_INTERP_BILINEAR
|
347 HORIZ_INTERP_BILINEAR
);
351 case DRM_MODE_SCALE_FULLSCREEN
:
353 * Full scaling, even if it changes the aspect ratio.
354 * Fortunately this is all done for us in hw.
356 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
||
357 mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
358 pfit_control
|= PFIT_ENABLE
;
359 if (INTEL_INFO(dev
)->gen
>= 4)
360 pfit_control
|= PFIT_SCALING_AUTO
;
362 pfit_control
|= (VERT_AUTO_SCALE
|
363 VERT_INTERP_BILINEAR
|
365 HORIZ_INTERP_BILINEAR
);
374 /* If not enabling scaling, be consistent and always use 0. */
375 if ((pfit_control
& PFIT_ENABLE
) == 0) {
380 /* Make sure pre-965 set dither correctly */
381 if (INTEL_INFO(dev
)->gen
< 4 && dev_priv
->lvds_dither
)
382 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
384 if (pfit_control
!= intel_lvds
->pfit_control
||
385 pfit_pgm_ratios
!= intel_lvds
->pfit_pgm_ratios
) {
386 intel_lvds
->pfit_control
= pfit_control
;
387 intel_lvds
->pfit_pgm_ratios
= pfit_pgm_ratios
;
388 intel_lvds
->pfit_dirty
= true;
390 dev_priv
->lvds_border_bits
= border
;
393 * XXX: It would be nice to support lower refresh rates on the
394 * panels to reduce power consumption, and perhaps match the
395 * user's requested refresh rate.
401 static void intel_lvds_prepare(struct drm_encoder
*encoder
)
403 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
406 * Prior to Ironlake, we must disable the pipe if we want to adjust
407 * the panel fitter. However at all other times we can just reset
408 * the registers regardless.
410 if (!HAS_PCH_SPLIT(encoder
->dev
) && intel_lvds
->pfit_dirty
)
411 intel_lvds_disable(intel_lvds
);
414 static void intel_lvds_commit(struct drm_encoder
*encoder
)
416 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
418 /* Always do a full power on as we do not know what state
421 intel_lvds_enable(intel_lvds
);
424 static void intel_lvds_mode_set(struct drm_encoder
*encoder
,
425 struct drm_display_mode
*mode
,
426 struct drm_display_mode
*adjusted_mode
)
429 * The LVDS pin pair will already have been turned on in the
430 * intel_crtc_mode_set since it has a large impact on the DPLL
436 * Detect the LVDS connection.
438 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
439 * connected and closed means disconnected. We also send hotplug events as
440 * needed, using lid status notification from the input layer.
442 static enum drm_connector_status
443 intel_lvds_detect(struct drm_connector
*connector
, bool force
)
445 struct drm_device
*dev
= connector
->dev
;
446 enum drm_connector_status status
;
448 status
= intel_panel_detect(dev
);
449 if (status
!= connector_status_unknown
)
452 return connector_status_connected
;
456 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
458 static int intel_lvds_get_modes(struct drm_connector
*connector
)
460 struct intel_lvds
*intel_lvds
= intel_attached_lvds(connector
);
461 struct drm_device
*dev
= connector
->dev
;
462 struct drm_display_mode
*mode
;
464 if (intel_lvds
->edid
)
465 return drm_add_edid_modes(connector
, intel_lvds
->edid
);
467 mode
= drm_mode_duplicate(dev
, intel_lvds
->fixed_mode
);
471 drm_mode_probed_add(connector
, mode
);
475 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id
*id
)
477 DRM_INFO("Skipping forced modeset for %s\n", id
->ident
);
481 /* The GPU hangs up on these systems if modeset is performed on LID open */
482 static const struct dmi_system_id intel_no_modeset_on_lid
[] = {
484 .callback
= intel_no_modeset_on_lid_dmi_callback
,
485 .ident
= "Toshiba Tecra A11",
487 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
488 DMI_MATCH(DMI_PRODUCT_NAME
, "TECRA A11"),
492 { } /* terminating entry */
496 * Lid events. Note the use of 'modeset_on_lid':
497 * - we set it on lid close, and reset it on open
498 * - we use it as a "only once" bit (ie we ignore
499 * duplicate events where it was already properly
501 * - the suspend/resume paths will also set it to
502 * zero, since they restore the mode ("lid open").
504 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
507 struct drm_i915_private
*dev_priv
=
508 container_of(nb
, struct drm_i915_private
, lid_notifier
);
509 struct drm_device
*dev
= dev_priv
->dev
;
510 struct drm_connector
*connector
= dev_priv
->int_lvds_connector
;
512 if (dev
->switch_power_state
!= DRM_SWITCH_POWER_ON
)
516 * check and update the status of LVDS connector after receiving
517 * the LID nofication event.
520 connector
->status
= connector
->funcs
->detect(connector
,
523 /* Don't force modeset on machines where it causes a GPU lockup */
524 if (dmi_check_system(intel_no_modeset_on_lid
))
526 if (!acpi_lid_open()) {
527 dev_priv
->modeset_on_lid
= 1;
531 if (!dev_priv
->modeset_on_lid
)
534 dev_priv
->modeset_on_lid
= 0;
536 mutex_lock(&dev
->mode_config
.mutex
);
537 drm_helper_resume_force_mode(dev
);
538 mutex_unlock(&dev
->mode_config
.mutex
);
544 * intel_lvds_destroy - unregister and free LVDS structures
545 * @connector: connector to free
547 * Unregister the DDC bus for this connector then free the driver private
550 static void intel_lvds_destroy(struct drm_connector
*connector
)
552 struct drm_device
*dev
= connector
->dev
;
553 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
555 intel_panel_destroy_backlight(dev
);
557 if (dev_priv
->lid_notifier
.notifier_call
)
558 acpi_lid_notifier_unregister(&dev_priv
->lid_notifier
);
559 drm_sysfs_connector_remove(connector
);
560 drm_connector_cleanup(connector
);
564 static int intel_lvds_set_property(struct drm_connector
*connector
,
565 struct drm_property
*property
,
568 struct intel_lvds
*intel_lvds
= intel_attached_lvds(connector
);
569 struct drm_device
*dev
= connector
->dev
;
571 if (property
== dev
->mode_config
.scaling_mode_property
) {
572 struct drm_crtc
*crtc
= intel_lvds
->base
.base
.crtc
;
574 if (value
== DRM_MODE_SCALE_NONE
) {
575 DRM_DEBUG_KMS("no scaling not supported\n");
579 if (intel_lvds
->fitting_mode
== value
) {
580 /* the LVDS scaling property is not changed */
583 intel_lvds
->fitting_mode
= value
;
584 if (crtc
&& crtc
->enabled
) {
586 * If the CRTC is enabled, the display will be changed
587 * according to the new panel fitting mode.
589 drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
590 crtc
->x
, crtc
->y
, crtc
->fb
);
597 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
598 .dpms
= intel_lvds_dpms
,
599 .mode_fixup
= intel_lvds_mode_fixup
,
600 .prepare
= intel_lvds_prepare
,
601 .mode_set
= intel_lvds_mode_set
,
602 .commit
= intel_lvds_commit
,
605 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
606 .get_modes
= intel_lvds_get_modes
,
607 .mode_valid
= intel_lvds_mode_valid
,
608 .best_encoder
= intel_best_encoder
,
611 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
612 .dpms
= drm_helper_connector_dpms
,
613 .detect
= intel_lvds_detect
,
614 .fill_modes
= drm_helper_probe_single_connector_modes
,
615 .set_property
= intel_lvds_set_property
,
616 .destroy
= intel_lvds_destroy
,
619 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
620 .destroy
= intel_encoder_destroy
,
623 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
625 DRM_INFO("Skipping LVDS initialization for %s\n", id
->ident
);
629 /* These systems claim to have LVDS, but really don't */
630 static const struct dmi_system_id intel_no_lvds
[] = {
632 .callback
= intel_no_lvds_dmi_callback
,
633 .ident
= "Apple Mac Mini (Core series)",
635 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
636 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
640 .callback
= intel_no_lvds_dmi_callback
,
641 .ident
= "Apple Mac Mini (Core 2 series)",
643 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
644 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
648 .callback
= intel_no_lvds_dmi_callback
,
649 .ident
= "MSI IM-945GSE-A",
651 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
652 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
656 .callback
= intel_no_lvds_dmi_callback
,
657 .ident
= "Dell Studio Hybrid",
659 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
660 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
664 .callback
= intel_no_lvds_dmi_callback
,
665 .ident
= "Dell OptiPlex FX170",
667 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
668 DMI_MATCH(DMI_PRODUCT_NAME
, "OptiPlex FX170"),
672 .callback
= intel_no_lvds_dmi_callback
,
673 .ident
= "AOpen Mini PC",
675 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
676 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
680 .callback
= intel_no_lvds_dmi_callback
,
681 .ident
= "AOpen Mini PC MP915",
683 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
684 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
688 .callback
= intel_no_lvds_dmi_callback
,
689 .ident
= "AOpen i915GMm-HFS",
691 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
692 DMI_MATCH(DMI_BOARD_NAME
, "i915GMm-HFS"),
696 .callback
= intel_no_lvds_dmi_callback
,
697 .ident
= "AOpen i45GMx-I",
699 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
700 DMI_MATCH(DMI_BOARD_NAME
, "i45GMx-I"),
704 .callback
= intel_no_lvds_dmi_callback
,
705 .ident
= "Aopen i945GTt-VFA",
707 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
711 .callback
= intel_no_lvds_dmi_callback
,
712 .ident
= "Clientron U800",
714 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
715 DMI_MATCH(DMI_PRODUCT_NAME
, "U800"),
719 .callback
= intel_no_lvds_dmi_callback
,
720 .ident
= "Clientron E830",
722 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
723 DMI_MATCH(DMI_PRODUCT_NAME
, "E830"),
727 .callback
= intel_no_lvds_dmi_callback
,
728 .ident
= "Asus EeeBox PC EB1007",
730 DMI_MATCH(DMI_SYS_VENDOR
, "ASUSTeK Computer INC."),
731 DMI_MATCH(DMI_PRODUCT_NAME
, "EB1007"),
735 .callback
= intel_no_lvds_dmi_callback
,
736 .ident
= "Asus AT5NM10T-I",
738 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
739 DMI_MATCH(DMI_BOARD_NAME
, "AT5NM10T-I"),
743 .callback
= intel_no_lvds_dmi_callback
,
744 .ident
= "Hewlett-Packard t5745",
746 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
747 DMI_MATCH(DMI_BOARD_NAME
, "hp t5745"),
751 .callback
= intel_no_lvds_dmi_callback
,
752 .ident
= "Hewlett-Packard st5747",
754 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
755 DMI_MATCH(DMI_BOARD_NAME
, "hp st5747"),
759 { } /* terminating entry */
763 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
765 * @connector: LVDS connector
767 * Find the reduced downclock for LVDS in EDID.
769 static void intel_find_lvds_downclock(struct drm_device
*dev
,
770 struct drm_display_mode
*fixed_mode
,
771 struct drm_connector
*connector
)
773 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
774 struct drm_display_mode
*scan
;
777 temp_downclock
= fixed_mode
->clock
;
778 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
780 * If one mode has the same resolution with the fixed_panel
781 * mode while they have the different refresh rate, it means
782 * that the reduced downclock is found for the LVDS. In such
783 * case we can set the different FPx0/1 to dynamically select
784 * between low and high frequency.
786 if (scan
->hdisplay
== fixed_mode
->hdisplay
&&
787 scan
->hsync_start
== fixed_mode
->hsync_start
&&
788 scan
->hsync_end
== fixed_mode
->hsync_end
&&
789 scan
->htotal
== fixed_mode
->htotal
&&
790 scan
->vdisplay
== fixed_mode
->vdisplay
&&
791 scan
->vsync_start
== fixed_mode
->vsync_start
&&
792 scan
->vsync_end
== fixed_mode
->vsync_end
&&
793 scan
->vtotal
== fixed_mode
->vtotal
) {
794 if (scan
->clock
< temp_downclock
) {
796 * The downclock is already found. But we
797 * expect to find the lower downclock.
799 temp_downclock
= scan
->clock
;
803 if (temp_downclock
< fixed_mode
->clock
&& i915_lvds_downclock
) {
804 /* We found the downclock for LVDS. */
805 dev_priv
->lvds_downclock_avail
= 1;
806 dev_priv
->lvds_downclock
= temp_downclock
;
807 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
808 "Normal clock %dKhz, downclock %dKhz\n",
809 fixed_mode
->clock
, temp_downclock
);
814 * Enumerate the child dev array parsed from VBT to check whether
815 * the LVDS is present.
816 * If it is present, return 1.
817 * If it is not present, return false.
818 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
820 static bool lvds_is_present_in_vbt(struct drm_device
*dev
,
823 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
826 if (!dev_priv
->child_dev_num
)
829 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
830 struct child_device_config
*child
= dev_priv
->child_dev
+ i
;
832 /* If the device type is not LFP, continue.
833 * We have to check both the new identifiers as well as the
834 * old for compatibility with some BIOSes.
836 if (child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
837 child
->device_type
!= DEVICE_TYPE_LFP
)
840 if (intel_gmbus_is_port_valid(child
->i2c_pin
))
841 *i2c_pin
= child
->i2c_pin
;
843 /* However, we cannot trust the BIOS writers to populate
844 * the VBT correctly. Since LVDS requires additional
845 * information from AIM blocks, a non-zero addin offset is
846 * a good indicator that the LVDS is actually present.
848 if (child
->addin_offset
)
851 /* But even then some BIOS writers perform some black magic
852 * and instantiate the device without reference to any
853 * additional data. Trust that if the VBT was written into
854 * the OpRegion then they have validated the LVDS's existence.
856 if (dev_priv
->opregion
.vbt
)
863 static bool intel_lvds_supported(struct drm_device
*dev
)
865 /* With the introduction of the PCH we gained a dedicated
866 * LVDS presence pin, use it. */
867 if (HAS_PCH_SPLIT(dev
))
870 /* Otherwise LVDS was only attached to mobile products,
871 * except for the inglorious 830gm */
872 return IS_MOBILE(dev
) && !IS_I830(dev
);
876 * intel_lvds_init - setup LVDS connectors on this device
879 * Create the connector, register the LVDS DDC bus, and try to figure out what
880 * modes we can display on the LVDS panel (if present).
882 bool intel_lvds_init(struct drm_device
*dev
)
884 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
885 struct intel_lvds
*intel_lvds
;
886 struct intel_encoder
*intel_encoder
;
887 struct intel_connector
*intel_connector
;
888 struct drm_connector
*connector
;
889 struct drm_encoder
*encoder
;
890 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
891 struct drm_crtc
*crtc
;
896 if (!intel_lvds_supported(dev
))
899 /* Skip init on machines we know falsely report LVDS */
900 if (dmi_check_system(intel_no_lvds
))
903 pin
= GMBUS_PORT_PANEL
;
904 if (!lvds_is_present_in_vbt(dev
, &pin
)) {
905 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
909 if (HAS_PCH_SPLIT(dev
)) {
910 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
912 if (dev_priv
->edp
.support
) {
913 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
918 intel_lvds
= kzalloc(sizeof(struct intel_lvds
), GFP_KERNEL
);
923 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
924 if (!intel_connector
) {
929 if (!HAS_PCH_SPLIT(dev
)) {
930 intel_lvds
->pfit_control
= I915_READ(PFIT_CONTROL
);
933 intel_encoder
= &intel_lvds
->base
;
934 encoder
= &intel_encoder
->base
;
935 connector
= &intel_connector
->base
;
936 drm_connector_init(dev
, &intel_connector
->base
, &intel_lvds_connector_funcs
,
937 DRM_MODE_CONNECTOR_LVDS
);
939 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_lvds_enc_funcs
,
940 DRM_MODE_ENCODER_LVDS
);
942 intel_connector_attach_encoder(intel_connector
, intel_encoder
);
943 intel_encoder
->type
= INTEL_OUTPUT_LVDS
;
945 intel_encoder
->clone_mask
= (1 << INTEL_LVDS_CLONE_BIT
);
946 if (HAS_PCH_SPLIT(dev
))
947 intel_encoder
->crtc_mask
= (1 << 0) | (1 << 1) | (1 << 2);
949 intel_encoder
->crtc_mask
= (1 << 1);
951 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
952 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
953 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
954 connector
->interlace_allowed
= false;
955 connector
->doublescan_allowed
= false;
957 /* create the scaling mode property */
958 drm_mode_create_scaling_mode_property(dev
);
960 * the initial panel fitting mode will be FULL_SCREEN.
963 drm_connector_attach_property(&intel_connector
->base
,
964 dev
->mode_config
.scaling_mode_property
,
965 DRM_MODE_SCALE_ASPECT
);
966 intel_lvds
->fitting_mode
= DRM_MODE_SCALE_ASPECT
;
969 * 1) check for EDID on DDC
970 * 2) check for VBT data
971 * 3) check to see if LVDS is already on
972 * if none of the above, no panel
973 * 4) make sure lid is open
974 * if closed, act like it's not there for now
978 * Attempt to get the fixed panel mode from DDC. Assume that the
979 * preferred mode is the right one.
981 intel_lvds
->edid
= drm_get_edid(connector
,
982 intel_gmbus_get_adapter(dev_priv
,
984 if (intel_lvds
->edid
) {
985 if (drm_add_edid_modes(connector
,
987 drm_mode_connector_update_edid_property(connector
,
990 kfree(intel_lvds
->edid
);
991 intel_lvds
->edid
= NULL
;
994 if (!intel_lvds
->edid
) {
995 /* Didn't get an EDID, so
996 * Set wide sync ranges so we get all modes
997 * handed to valid_mode for checking
999 connector
->display_info
.min_vfreq
= 0;
1000 connector
->display_info
.max_vfreq
= 200;
1001 connector
->display_info
.min_hfreq
= 0;
1002 connector
->display_info
.max_hfreq
= 200;
1005 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
1006 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
1007 intel_lvds
->fixed_mode
=
1008 drm_mode_duplicate(dev
, scan
);
1009 intel_find_lvds_downclock(dev
,
1010 intel_lvds
->fixed_mode
,
1016 /* Failed to get EDID, what about VBT? */
1017 if (dev_priv
->lfp_lvds_vbt_mode
) {
1018 intel_lvds
->fixed_mode
=
1019 drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
1020 if (intel_lvds
->fixed_mode
) {
1021 intel_lvds
->fixed_mode
->type
|=
1022 DRM_MODE_TYPE_PREFERRED
;
1028 * If we didn't get EDID, try checking if the panel is already turned
1029 * on. If so, assume that whatever is currently programmed is the
1033 /* Ironlake: FIXME if still fail, not try pipe mode now */
1034 if (HAS_PCH_SPLIT(dev
))
1037 lvds
= I915_READ(LVDS
);
1038 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
1039 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
1041 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
1042 intel_lvds
->fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
1043 if (intel_lvds
->fixed_mode
) {
1044 intel_lvds
->fixed_mode
->type
|=
1045 DRM_MODE_TYPE_PREFERRED
;
1050 /* If we still don't have a mode after all that, give up. */
1051 if (!intel_lvds
->fixed_mode
)
1055 if (HAS_PCH_SPLIT(dev
)) {
1058 pipe
= (I915_READ(PCH_LVDS
) & LVDS_PIPEB_SELECT
) ? 1 : 0;
1060 /* make sure PWM is enabled and locked to the LVDS pipe */
1061 pwm
= I915_READ(BLC_PWM_CPU_CTL2
);
1062 if (pipe
== 0 && (pwm
& PWM_PIPE_B
))
1063 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
& ~PWM_ENABLE
);
1068 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
| PWM_ENABLE
);
1070 pwm
= I915_READ(BLC_PWM_PCH_CTL1
);
1071 pwm
|= PWM_PCH_ENABLE
;
1072 I915_WRITE(BLC_PWM_PCH_CTL1
, pwm
);
1074 * Unlock registers and just
1075 * leave them unlocked
1077 I915_WRITE(PCH_PP_CONTROL
,
1078 I915_READ(PCH_PP_CONTROL
) | PANEL_UNLOCK_REGS
);
1081 * Unlock registers and just
1082 * leave them unlocked
1084 I915_WRITE(PP_CONTROL
,
1085 I915_READ(PP_CONTROL
) | PANEL_UNLOCK_REGS
);
1087 dev_priv
->lid_notifier
.notifier_call
= intel_lid_notify
;
1088 if (acpi_lid_notifier_register(&dev_priv
->lid_notifier
)) {
1089 DRM_DEBUG_KMS("lid notifier registration failed\n");
1090 dev_priv
->lid_notifier
.notifier_call
= NULL
;
1092 /* keep the LVDS connector */
1093 dev_priv
->int_lvds_connector
= connector
;
1094 drm_sysfs_connector_add(connector
);
1096 intel_panel_setup_backlight(dev
);
1101 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1102 drm_connector_cleanup(connector
);
1103 drm_encoder_cleanup(encoder
);
1105 kfree(intel_connector
);