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
;
51 static struct intel_lvds
*enc_to_intel_lvds(struct drm_encoder
*encoder
)
53 return container_of(encoder
, struct intel_lvds
, base
.base
);
56 static void intel_lvds_lock_panel(struct drm_device
*dev
, bool lock
)
58 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
61 I915_WRITE(PP_CONTROL
, I915_READ(PP_CONTROL
) & 0x3);
63 I915_WRITE(PP_CONTROL
, I915_READ(PP_CONTROL
) | PANEL_UNLOCK_REGS
);
67 * Sets the power state for the panel.
69 static void intel_lvds_set_power(struct drm_device
*dev
, bool on
)
71 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
72 u32 ctl_reg
, status_reg
, lvds_reg
;
74 if (HAS_PCH_SPLIT(dev
)) {
75 ctl_reg
= PCH_PP_CONTROL
;
76 status_reg
= PCH_PP_STATUS
;
80 status_reg
= PP_STATUS
;
85 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) | LVDS_PORT_EN
);
86 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) | POWER_TARGET_ON
);
87 if (wait_for(I915_READ(status_reg
) & PP_ON
, 1000))
88 DRM_ERROR("timed out waiting to enable LVDS pipe");
90 intel_panel_set_backlight(dev
, dev_priv
->backlight_level
);
92 intel_panel_set_backlight(dev
, 0);
94 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) & ~POWER_TARGET_ON
);
95 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) & ~LVDS_PORT_EN
);
96 POSTING_READ(lvds_reg
);
100 static void intel_lvds_dpms(struct drm_encoder
*encoder
, int mode
)
102 struct drm_device
*dev
= encoder
->dev
;
104 if (mode
== DRM_MODE_DPMS_ON
)
105 intel_lvds_set_power(dev
, true);
107 intel_lvds_set_power(dev
, false);
109 /* XXX: We never power down the LVDS pairs. */
112 static int intel_lvds_mode_valid(struct drm_connector
*connector
,
113 struct drm_display_mode
*mode
)
115 struct drm_device
*dev
= connector
->dev
;
116 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
117 struct drm_display_mode
*fixed_mode
= dev_priv
->panel_fixed_mode
;
120 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
122 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
130 centre_horizontally(struct drm_display_mode
*mode
,
133 u32 border
, sync_pos
, blank_width
, sync_width
;
135 /* keep the hsync and hblank widths constant */
136 sync_width
= mode
->crtc_hsync_end
- mode
->crtc_hsync_start
;
137 blank_width
= mode
->crtc_hblank_end
- mode
->crtc_hblank_start
;
138 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
140 border
= (mode
->hdisplay
- width
+ 1) / 2;
141 border
+= border
& 1; /* make the border even */
143 mode
->crtc_hdisplay
= width
;
144 mode
->crtc_hblank_start
= width
+ border
;
145 mode
->crtc_hblank_end
= mode
->crtc_hblank_start
+ blank_width
;
147 mode
->crtc_hsync_start
= mode
->crtc_hblank_start
+ sync_pos
;
148 mode
->crtc_hsync_end
= mode
->crtc_hsync_start
+ sync_width
;
152 centre_vertically(struct drm_display_mode
*mode
,
155 u32 border
, sync_pos
, blank_width
, sync_width
;
157 /* keep the vsync and vblank widths constant */
158 sync_width
= mode
->crtc_vsync_end
- mode
->crtc_vsync_start
;
159 blank_width
= mode
->crtc_vblank_end
- mode
->crtc_vblank_start
;
160 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
162 border
= (mode
->vdisplay
- height
+ 1) / 2;
164 mode
->crtc_vdisplay
= height
;
165 mode
->crtc_vblank_start
= height
+ border
;
166 mode
->crtc_vblank_end
= mode
->crtc_vblank_start
+ blank_width
;
168 mode
->crtc_vsync_start
= mode
->crtc_vblank_start
+ sync_pos
;
169 mode
->crtc_vsync_end
= mode
->crtc_vsync_start
+ sync_width
;
172 static inline u32
panel_fitter_scaling(u32 source
, u32 target
)
175 * Floating point operation is not supported. So the FACTOR
176 * is defined, which can avoid the floating point computation
177 * when calculating the panel ratio.
180 #define FACTOR (1 << ACCURACY)
181 u32 ratio
= source
* FACTOR
/ target
;
182 return (FACTOR
* ratio
+ FACTOR
/2) / FACTOR
;
185 static bool intel_lvds_mode_fixup(struct drm_encoder
*encoder
,
186 struct drm_display_mode
*mode
,
187 struct drm_display_mode
*adjusted_mode
)
189 struct drm_device
*dev
= encoder
->dev
;
190 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
191 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->crtc
);
192 struct intel_lvds
*intel_lvds
= enc_to_intel_lvds(encoder
);
193 struct drm_encoder
*tmp_encoder
;
194 u32 pfit_control
= 0, pfit_pgm_ratios
= 0, border
= 0;
196 /* Should never happen!! */
197 if (!IS_I965G(dev
) && intel_crtc
->pipe
== 0) {
198 DRM_ERROR("Can't support LVDS on pipe A\n");
202 /* Should never happen!! */
203 list_for_each_entry(tmp_encoder
, &dev
->mode_config
.encoder_list
, head
) {
204 if (tmp_encoder
!= encoder
&& tmp_encoder
->crtc
== encoder
->crtc
) {
205 DRM_ERROR("Can't enable LVDS and another "
206 "encoder on the same pipe\n");
210 /* If we don't have a panel mode, there is nothing we can do */
211 if (dev_priv
->panel_fixed_mode
== NULL
)
215 * We have timings from the BIOS for the panel, put them in
216 * to the adjusted mode. The CRTC will be set up for this mode,
217 * with the panel scaling set up to source from the H/VDisplay
218 * of the original mode.
220 intel_fixed_panel_mode(dev_priv
->panel_fixed_mode
, adjusted_mode
);
222 if (HAS_PCH_SPLIT(dev
)) {
223 intel_pch_panel_fitting(dev
, intel_lvds
->fitting_mode
,
224 mode
, adjusted_mode
);
228 /* Make sure pre-965s set dither correctly */
229 if (!IS_I965G(dev
)) {
230 if (dev_priv
->panel_wants_dither
|| dev_priv
->lvds_dither
)
231 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
234 /* Native modes don't need fitting */
235 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
236 adjusted_mode
->vdisplay
== mode
->vdisplay
)
239 /* 965+ wants fuzzy fitting */
241 pfit_control
|= ((intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
245 * Enable automatic panel scaling for non-native modes so that they fill
246 * the screen. Should be enabled before the pipe is enabled, according
247 * to register description and PRM.
248 * Change the value here to see the borders for debugging
250 I915_WRITE(BCLRPAT_A
, 0);
251 I915_WRITE(BCLRPAT_B
, 0);
253 switch (intel_lvds
->fitting_mode
) {
254 case DRM_MODE_SCALE_CENTER
:
256 * For centered modes, we have to calculate border widths &
257 * heights and modify the values programmed into the CRTC.
259 centre_horizontally(adjusted_mode
, mode
->hdisplay
);
260 centre_vertically(adjusted_mode
, mode
->vdisplay
);
261 border
= LVDS_BORDER_ENABLE
;
264 case DRM_MODE_SCALE_ASPECT
:
265 /* Scale but preserve the aspect ratio */
267 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
268 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
270 pfit_control
|= PFIT_ENABLE
;
271 /* 965+ is easy, it does everything in hw */
272 if (scaled_width
> scaled_height
)
273 pfit_control
|= PFIT_SCALING_PILLAR
;
274 else if (scaled_width
< scaled_height
)
275 pfit_control
|= PFIT_SCALING_LETTER
;
277 pfit_control
|= PFIT_SCALING_AUTO
;
279 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
280 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
282 * For earlier chips we have to calculate the scaling
283 * ratio by hand and program it into the
284 * PFIT_PGM_RATIO register
286 if (scaled_width
> scaled_height
) { /* pillar */
287 centre_horizontally(adjusted_mode
, scaled_height
/ mode
->vdisplay
);
289 border
= LVDS_BORDER_ENABLE
;
290 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
) {
291 u32 bits
= panel_fitter_scaling(mode
->vdisplay
, adjusted_mode
->vdisplay
);
292 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
293 bits
<< PFIT_VERT_SCALE_SHIFT
);
294 pfit_control
|= (PFIT_ENABLE
|
295 VERT_INTERP_BILINEAR
|
296 HORIZ_INTERP_BILINEAR
);
298 } else if (scaled_width
< scaled_height
) { /* letter */
299 centre_vertically(adjusted_mode
, scaled_width
/ mode
->hdisplay
);
301 border
= LVDS_BORDER_ENABLE
;
302 if (mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
303 u32 bits
= panel_fitter_scaling(mode
->hdisplay
, adjusted_mode
->hdisplay
);
304 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
305 bits
<< PFIT_VERT_SCALE_SHIFT
);
306 pfit_control
|= (PFIT_ENABLE
|
307 VERT_INTERP_BILINEAR
|
308 HORIZ_INTERP_BILINEAR
);
311 /* Aspects match, Let hw scale both directions */
312 pfit_control
|= (PFIT_ENABLE
|
313 VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
314 VERT_INTERP_BILINEAR
|
315 HORIZ_INTERP_BILINEAR
);
319 case DRM_MODE_SCALE_FULLSCREEN
:
321 * Full scaling, even if it changes the aspect ratio.
322 * Fortunately this is all done for us in hw.
324 pfit_control
|= PFIT_ENABLE
;
326 pfit_control
|= PFIT_SCALING_AUTO
;
328 pfit_control
|= (VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
329 VERT_INTERP_BILINEAR
|
330 HORIZ_INTERP_BILINEAR
);
338 intel_lvds
->pfit_control
= pfit_control
;
339 intel_lvds
->pfit_pgm_ratios
= pfit_pgm_ratios
;
340 dev_priv
->lvds_border_bits
= border
;
343 * XXX: It would be nice to support lower refresh rates on the
344 * panels to reduce power consumption, and perhaps match the
345 * user's requested refresh rate.
351 static void intel_lvds_prepare(struct drm_encoder
*encoder
)
353 struct drm_device
*dev
= encoder
->dev
;
354 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
355 struct intel_lvds
*intel_lvds
= enc_to_intel_lvds(encoder
);
357 dev_priv
->backlight_level
= intel_panel_get_backlight(dev
);
359 if (intel_lvds
->pfit_control
== I915_READ(PFIT_CONTROL
))
360 intel_lvds_lock_panel(dev
, false);
362 intel_lvds_set_power(dev
, false);
365 static void intel_lvds_commit( struct drm_encoder
*encoder
)
367 struct drm_device
*dev
= encoder
->dev
;
368 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
370 if (dev_priv
->backlight_level
== 0)
371 dev_priv
->backlight_level
= intel_panel_get_max_backlight(dev
);
373 if ((I915_READ(PP_CONTROL
) & PANEL_UNLOCK_REGS
) == PANEL_UNLOCK_REGS
)
374 intel_lvds_lock_panel(dev
, true);
376 intel_lvds_set_power(dev
, true);
379 static void intel_lvds_mode_set(struct drm_encoder
*encoder
,
380 struct drm_display_mode
*mode
,
381 struct drm_display_mode
*adjusted_mode
)
383 struct drm_device
*dev
= encoder
->dev
;
384 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
385 struct intel_lvds
*intel_lvds
= enc_to_intel_lvds(encoder
);
388 * The LVDS pin pair will already have been turned on in the
389 * intel_crtc_mode_set since it has a large impact on the DPLL
393 if (HAS_PCH_SPLIT(dev
))
397 * Enable automatic panel scaling so that non-native modes fill the
398 * screen. Should be enabled before the pipe is enabled, according to
399 * register description and PRM.
401 I915_WRITE(PFIT_PGM_RATIOS
, intel_lvds
->pfit_pgm_ratios
);
402 I915_WRITE(PFIT_CONTROL
, intel_lvds
->pfit_control
);
406 * Detect the LVDS connection.
408 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
409 * connected and closed means disconnected. We also send hotplug events as
410 * needed, using lid status notification from the input layer.
412 static enum drm_connector_status
intel_lvds_detect(struct drm_connector
*connector
)
414 struct drm_device
*dev
= connector
->dev
;
415 enum drm_connector_status status
= connector_status_connected
;
417 /* ACPI lid methods were generally unreliable in this generation, so
420 if (IS_GEN2(dev
) || IS_GEN3(dev
))
421 return connector_status_connected
;
427 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
429 static int intel_lvds_get_modes(struct drm_connector
*connector
)
431 struct drm_device
*dev
= connector
->dev
;
432 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
434 if (dev_priv
->lvds_edid_good
) {
435 struct intel_encoder
*encoder
= intel_attached_encoder(connector
);
436 int ret
= intel_ddc_get_modes(connector
, encoder
->ddc_bus
);
441 /* Didn't get an EDID, so
442 * Set wide sync ranges so we get all modes
443 * handed to valid_mode for checking
445 connector
->display_info
.min_vfreq
= 0;
446 connector
->display_info
.max_vfreq
= 200;
447 connector
->display_info
.min_hfreq
= 0;
448 connector
->display_info
.max_hfreq
= 200;
450 if (dev_priv
->panel_fixed_mode
!= NULL
) {
451 struct drm_display_mode
*mode
;
453 mode
= drm_mode_duplicate(dev
, dev_priv
->panel_fixed_mode
);
454 drm_mode_probed_add(connector
, mode
);
462 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id
*id
)
464 DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id
->ident
);
468 /* The GPU hangs up on these systems if modeset is performed on LID open */
469 static const struct dmi_system_id intel_no_modeset_on_lid
[] = {
471 .callback
= intel_no_modeset_on_lid_dmi_callback
,
472 .ident
= "Toshiba Tecra A11",
474 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
475 DMI_MATCH(DMI_PRODUCT_NAME
, "TECRA A11"),
479 { } /* terminating entry */
483 * Lid events. Note the use of 'modeset_on_lid':
484 * - we set it on lid close, and reset it on open
485 * - we use it as a "only once" bit (ie we ignore
486 * duplicate events where it was already properly
488 * - the suspend/resume paths will also set it to
489 * zero, since they restore the mode ("lid open").
491 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
494 struct drm_i915_private
*dev_priv
=
495 container_of(nb
, struct drm_i915_private
, lid_notifier
);
496 struct drm_device
*dev
= dev_priv
->dev
;
497 struct drm_connector
*connector
= dev_priv
->int_lvds_connector
;
500 * check and update the status of LVDS connector after receiving
501 * the LID nofication event.
504 connector
->status
= connector
->funcs
->detect(connector
);
505 /* Don't force modeset on machines where it causes a GPU lockup */
506 if (dmi_check_system(intel_no_modeset_on_lid
))
508 if (!acpi_lid_open()) {
509 dev_priv
->modeset_on_lid
= 1;
513 if (!dev_priv
->modeset_on_lid
)
516 dev_priv
->modeset_on_lid
= 0;
518 mutex_lock(&dev
->mode_config
.mutex
);
519 drm_helper_resume_force_mode(dev
);
520 mutex_unlock(&dev
->mode_config
.mutex
);
526 * intel_lvds_destroy - unregister and free LVDS structures
527 * @connector: connector to free
529 * Unregister the DDC bus for this connector then free the driver private
532 static void intel_lvds_destroy(struct drm_connector
*connector
)
534 struct drm_device
*dev
= connector
->dev
;
535 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
537 if (dev_priv
->lid_notifier
.notifier_call
)
538 acpi_lid_notifier_unregister(&dev_priv
->lid_notifier
);
539 drm_sysfs_connector_remove(connector
);
540 drm_connector_cleanup(connector
);
544 static int intel_lvds_set_property(struct drm_connector
*connector
,
545 struct drm_property
*property
,
548 struct drm_device
*dev
= connector
->dev
;
550 if (property
== dev
->mode_config
.scaling_mode_property
&&
551 connector
->encoder
) {
552 struct drm_crtc
*crtc
= connector
->encoder
->crtc
;
553 struct drm_encoder
*encoder
= connector
->encoder
;
554 struct intel_lvds
*intel_lvds
= enc_to_intel_lvds(encoder
);
556 if (value
== DRM_MODE_SCALE_NONE
) {
557 DRM_DEBUG_KMS("no scaling not supported\n");
560 if (intel_lvds
->fitting_mode
== value
) {
561 /* the LVDS scaling property is not changed */
564 intel_lvds
->fitting_mode
= value
;
565 if (crtc
&& crtc
->enabled
) {
567 * If the CRTC is enabled, the display will be changed
568 * according to the new panel fitting mode.
570 drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
571 crtc
->x
, crtc
->y
, crtc
->fb
);
578 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
579 .dpms
= intel_lvds_dpms
,
580 .mode_fixup
= intel_lvds_mode_fixup
,
581 .prepare
= intel_lvds_prepare
,
582 .mode_set
= intel_lvds_mode_set
,
583 .commit
= intel_lvds_commit
,
586 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
587 .get_modes
= intel_lvds_get_modes
,
588 .mode_valid
= intel_lvds_mode_valid
,
589 .best_encoder
= intel_best_encoder
,
592 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
593 .dpms
= drm_helper_connector_dpms
,
594 .detect
= intel_lvds_detect
,
595 .fill_modes
= drm_helper_probe_single_connector_modes
,
596 .set_property
= intel_lvds_set_property
,
597 .destroy
= intel_lvds_destroy
,
600 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
601 .destroy
= intel_encoder_destroy
,
604 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
606 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id
->ident
);
610 /* These systems claim to have LVDS, but really don't */
611 static const struct dmi_system_id intel_no_lvds
[] = {
613 .callback
= intel_no_lvds_dmi_callback
,
614 .ident
= "Apple Mac Mini (Core series)",
616 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
617 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
621 .callback
= intel_no_lvds_dmi_callback
,
622 .ident
= "Apple Mac Mini (Core 2 series)",
624 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
625 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
629 .callback
= intel_no_lvds_dmi_callback
,
630 .ident
= "MSI IM-945GSE-A",
632 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
633 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
637 .callback
= intel_no_lvds_dmi_callback
,
638 .ident
= "Dell Studio Hybrid",
640 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
641 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
645 .callback
= intel_no_lvds_dmi_callback
,
646 .ident
= "AOpen Mini PC",
648 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
649 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
653 .callback
= intel_no_lvds_dmi_callback
,
654 .ident
= "AOpen Mini PC MP915",
656 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
657 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
661 .callback
= intel_no_lvds_dmi_callback
,
662 .ident
= "Aopen i945GTt-VFA",
664 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
668 .callback
= intel_no_lvds_dmi_callback
,
669 .ident
= "Clientron U800",
671 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
672 DMI_MATCH(DMI_PRODUCT_NAME
, "U800"),
676 { } /* terminating entry */
680 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
682 * @connector: LVDS connector
684 * Find the reduced downclock for LVDS in EDID.
686 static void intel_find_lvds_downclock(struct drm_device
*dev
,
687 struct drm_connector
*connector
)
689 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
690 struct drm_display_mode
*scan
, *panel_fixed_mode
;
693 panel_fixed_mode
= dev_priv
->panel_fixed_mode
;
694 temp_downclock
= panel_fixed_mode
->clock
;
696 mutex_lock(&dev
->mode_config
.mutex
);
697 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
699 * If one mode has the same resolution with the fixed_panel
700 * mode while they have the different refresh rate, it means
701 * that the reduced downclock is found for the LVDS. In such
702 * case we can set the different FPx0/1 to dynamically select
703 * between low and high frequency.
705 if (scan
->hdisplay
== panel_fixed_mode
->hdisplay
&&
706 scan
->hsync_start
== panel_fixed_mode
->hsync_start
&&
707 scan
->hsync_end
== panel_fixed_mode
->hsync_end
&&
708 scan
->htotal
== panel_fixed_mode
->htotal
&&
709 scan
->vdisplay
== panel_fixed_mode
->vdisplay
&&
710 scan
->vsync_start
== panel_fixed_mode
->vsync_start
&&
711 scan
->vsync_end
== panel_fixed_mode
->vsync_end
&&
712 scan
->vtotal
== panel_fixed_mode
->vtotal
) {
713 if (scan
->clock
< temp_downclock
) {
715 * The downclock is already found. But we
716 * expect to find the lower downclock.
718 temp_downclock
= scan
->clock
;
722 mutex_unlock(&dev
->mode_config
.mutex
);
723 if (temp_downclock
< panel_fixed_mode
->clock
&&
724 i915_lvds_downclock
) {
725 /* We found the downclock for LVDS. */
726 dev_priv
->lvds_downclock_avail
= 1;
727 dev_priv
->lvds_downclock
= temp_downclock
;
728 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
729 "Normal clock %dKhz, downclock %dKhz\n",
730 panel_fixed_mode
->clock
, temp_downclock
);
736 * Enumerate the child dev array parsed from VBT to check whether
737 * the LVDS is present.
738 * If it is present, return 1.
739 * If it is not present, return false.
740 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
742 static bool lvds_is_present_in_vbt(struct drm_device
*dev
)
744 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
747 if (!dev_priv
->child_dev_num
)
750 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
751 struct child_device_config
*child
= dev_priv
->child_dev
+ i
;
753 /* If the device type is not LFP, continue.
754 * We have to check both the new identifiers as well as the
755 * old for compatibility with some BIOSes.
757 if (child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
758 child
->device_type
!= DEVICE_TYPE_LFP
)
761 /* However, we cannot trust the BIOS writers to populate
762 * the VBT correctly. Since LVDS requires additional
763 * information from AIM blocks, a non-zero addin offset is
764 * a good indicator that the LVDS is actually present.
766 if (child
->addin_offset
)
769 /* But even then some BIOS writers perform some black magic
770 * and instantiate the device without reference to any
771 * additional data. Trust that if the VBT was written into
772 * the OpRegion then they have validated the LVDS's existence.
774 if (dev_priv
->opregion
.vbt
)
782 * intel_lvds_init - setup LVDS connectors on this device
785 * Create the connector, register the LVDS DDC bus, and try to figure out what
786 * modes we can display on the LVDS panel (if present).
788 void intel_lvds_init(struct drm_device
*dev
)
790 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
791 struct intel_lvds
*intel_lvds
;
792 struct intel_encoder
*intel_encoder
;
793 struct intel_connector
*intel_connector
;
794 struct drm_connector
*connector
;
795 struct drm_encoder
*encoder
;
796 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
797 struct drm_crtc
*crtc
;
799 int pipe
, gpio
= GPIOC
;
801 /* Skip init on machines we know falsely report LVDS */
802 if (dmi_check_system(intel_no_lvds
))
805 if (!lvds_is_present_in_vbt(dev
)) {
806 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
810 if (HAS_PCH_SPLIT(dev
)) {
811 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
813 if (dev_priv
->edp_support
) {
814 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
820 intel_lvds
= kzalloc(sizeof(struct intel_lvds
), GFP_KERNEL
);
825 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
826 if (!intel_connector
) {
831 intel_encoder
= &intel_lvds
->base
;
832 encoder
= &intel_encoder
->base
;
833 connector
= &intel_connector
->base
;
834 drm_connector_init(dev
, &intel_connector
->base
, &intel_lvds_connector_funcs
,
835 DRM_MODE_CONNECTOR_LVDS
);
837 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_lvds_enc_funcs
,
838 DRM_MODE_ENCODER_LVDS
);
840 intel_connector_attach_encoder(intel_connector
, intel_encoder
);
841 intel_encoder
->type
= INTEL_OUTPUT_LVDS
;
843 intel_encoder
->clone_mask
= (1 << INTEL_LVDS_CLONE_BIT
);
844 intel_encoder
->crtc_mask
= (1 << 1);
845 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
846 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
847 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
848 connector
->interlace_allowed
= false;
849 connector
->doublescan_allowed
= false;
851 /* create the scaling mode property */
852 drm_mode_create_scaling_mode_property(dev
);
854 * the initial panel fitting mode will be FULL_SCREEN.
857 drm_connector_attach_property(&intel_connector
->base
,
858 dev
->mode_config
.scaling_mode_property
,
859 DRM_MODE_SCALE_ASPECT
);
860 intel_lvds
->fitting_mode
= DRM_MODE_SCALE_ASPECT
;
863 * 1) check for EDID on DDC
864 * 2) check for VBT data
865 * 3) check to see if LVDS is already on
866 * if none of the above, no panel
867 * 4) make sure lid is open
868 * if closed, act like it's not there for now
871 /* Set up the DDC bus. */
872 intel_encoder
->ddc_bus
= intel_i2c_create(dev
, gpio
, "LVDSDDC_C");
873 if (!intel_encoder
->ddc_bus
) {
874 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
880 * Attempt to get the fixed panel mode from DDC. Assume that the
881 * preferred mode is the right one.
883 dev_priv
->lvds_edid_good
= true;
885 if (!intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
))
886 dev_priv
->lvds_edid_good
= false;
888 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
889 mutex_lock(&dev
->mode_config
.mutex
);
890 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
891 dev_priv
->panel_fixed_mode
=
892 drm_mode_duplicate(dev
, scan
);
893 mutex_unlock(&dev
->mode_config
.mutex
);
894 intel_find_lvds_downclock(dev
, connector
);
897 mutex_unlock(&dev
->mode_config
.mutex
);
900 /* Failed to get EDID, what about VBT? */
901 if (dev_priv
->lfp_lvds_vbt_mode
) {
902 mutex_lock(&dev
->mode_config
.mutex
);
903 dev_priv
->panel_fixed_mode
=
904 drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
905 mutex_unlock(&dev
->mode_config
.mutex
);
906 if (dev_priv
->panel_fixed_mode
) {
907 dev_priv
->panel_fixed_mode
->type
|=
908 DRM_MODE_TYPE_PREFERRED
;
914 * If we didn't get EDID, try checking if the panel is already turned
915 * on. If so, assume that whatever is currently programmed is the
919 /* Ironlake: FIXME if still fail, not try pipe mode now */
920 if (HAS_PCH_SPLIT(dev
))
923 lvds
= I915_READ(LVDS
);
924 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
925 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
927 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
928 dev_priv
->panel_fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
929 if (dev_priv
->panel_fixed_mode
) {
930 dev_priv
->panel_fixed_mode
->type
|=
931 DRM_MODE_TYPE_PREFERRED
;
936 /* If we still don't have a mode after all that, give up. */
937 if (!dev_priv
->panel_fixed_mode
)
941 if (HAS_PCH_SPLIT(dev
)) {
943 /* make sure PWM is enabled */
944 pwm
= I915_READ(BLC_PWM_CPU_CTL2
);
945 pwm
|= (PWM_ENABLE
| PWM_PIPE_B
);
946 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
);
948 pwm
= I915_READ(BLC_PWM_PCH_CTL1
);
949 pwm
|= PWM_PCH_ENABLE
;
950 I915_WRITE(BLC_PWM_PCH_CTL1
, pwm
);
952 dev_priv
->lid_notifier
.notifier_call
= intel_lid_notify
;
953 if (acpi_lid_notifier_register(&dev_priv
->lid_notifier
)) {
954 DRM_DEBUG_KMS("lid notifier registration failed\n");
955 dev_priv
->lid_notifier
.notifier_call
= NULL
;
957 /* keep the LVDS connector */
958 dev_priv
->int_lvds_connector
= connector
;
959 drm_sysfs_connector_add(connector
);
963 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
964 if (intel_encoder
->ddc_bus
)
965 intel_i2c_destroy(intel_encoder
->ddc_bus
);
966 drm_connector_cleanup(connector
);
967 drm_encoder_cleanup(encoder
);
969 kfree(intel_connector
);