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>
35 #include <drm/drm_crtc.h>
36 #include <drm/drm_edid.h>
37 #include "intel_drv.h"
38 #include <drm/i915_drm.h>
40 #include <linux/acpi.h>
42 /* Private structure for the integrated LVDS support */
43 struct intel_lvds_connector
{
44 struct intel_connector base
;
46 struct notifier_block lid_notifier
;
49 struct intel_lvds_encoder
{
50 struct intel_encoder base
;
57 struct intel_lvds_connector
*attached_connector
;
60 static struct intel_lvds_encoder
*to_lvds_encoder(struct drm_encoder
*encoder
)
62 return container_of(encoder
, struct intel_lvds_encoder
, base
.base
);
65 static struct intel_lvds_connector
*to_lvds_connector(struct drm_connector
*connector
)
67 return container_of(connector
, struct intel_lvds_connector
, base
.base
);
70 static bool intel_lvds_get_hw_state(struct intel_encoder
*encoder
,
73 struct drm_device
*dev
= encoder
->base
.dev
;
74 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
75 struct intel_lvds_encoder
*lvds_encoder
= to_lvds_encoder(&encoder
->base
);
78 tmp
= I915_READ(lvds_encoder
->reg
);
80 if (!(tmp
& LVDS_PORT_EN
))
84 *pipe
= PORT_TO_PIPE_CPT(tmp
);
86 *pipe
= PORT_TO_PIPE(tmp
);
91 /* The LVDS pin pair needs to be on before the DPLLs are enabled.
92 * This is an exception to the general rule that mode_set doesn't turn
95 static void intel_pre_pll_enable_lvds(struct intel_encoder
*encoder
)
97 struct intel_lvds_encoder
*lvds_encoder
= to_lvds_encoder(&encoder
->base
);
98 struct drm_device
*dev
= encoder
->base
.dev
;
99 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
100 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->base
.crtc
);
101 struct drm_display_mode
*fixed_mode
=
102 lvds_encoder
->attached_connector
->base
.panel
.fixed_mode
;
103 int pipe
= intel_crtc
->pipe
;
106 temp
= I915_READ(lvds_encoder
->reg
);
107 temp
|= LVDS_PORT_EN
| LVDS_A0A2_CLKA_POWER_UP
;
109 if (HAS_PCH_CPT(dev
)) {
110 temp
&= ~PORT_TRANS_SEL_MASK
;
111 temp
|= PORT_TRANS_SEL_CPT(pipe
);
114 temp
|= LVDS_PIPEB_SELECT
;
116 temp
&= ~LVDS_PIPEB_SELECT
;
120 /* set the corresponsding LVDS_BORDER bit */
121 temp
|= dev_priv
->lvds_border_bits
;
122 /* Set the B0-B3 data pairs corresponding to whether we're going to
123 * set the DPLLs for dual-channel mode or not.
125 if (lvds_encoder
->is_dual_link
)
126 temp
|= LVDS_B0B3_POWER_UP
| LVDS_CLKB_POWER_UP
;
128 temp
&= ~(LVDS_B0B3_POWER_UP
| LVDS_CLKB_POWER_UP
);
130 /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
131 * appropriately here, but we need to look more thoroughly into how
132 * panels behave in the two modes.
135 /* Set the dithering flag on LVDS as needed, note that there is no
136 * special lvds dither control bit on pch-split platforms, dithering is
137 * only controlled through the PIPECONF reg. */
138 if (INTEL_INFO(dev
)->gen
== 4) {
139 if (dev_priv
->lvds_dither
)
140 temp
|= LVDS_ENABLE_DITHER
;
142 temp
&= ~LVDS_ENABLE_DITHER
;
144 temp
&= ~(LVDS_HSYNC_POLARITY
| LVDS_VSYNC_POLARITY
);
145 if (fixed_mode
->flags
& DRM_MODE_FLAG_NHSYNC
)
146 temp
|= LVDS_HSYNC_POLARITY
;
147 if (fixed_mode
->flags
& DRM_MODE_FLAG_NVSYNC
)
148 temp
|= LVDS_VSYNC_POLARITY
;
150 I915_WRITE(lvds_encoder
->reg
, temp
);
153 static void intel_pre_enable_lvds(struct intel_encoder
*encoder
)
155 struct drm_device
*dev
= encoder
->base
.dev
;
156 struct intel_lvds_encoder
*enc
= to_lvds_encoder(&encoder
->base
);
157 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
159 if (HAS_PCH_SPLIT(dev
) || !enc
->pfit_control
)
163 * Enable automatic panel scaling so that non-native modes
164 * fill the screen. The panel fitter should only be
165 * adjusted whilst the pipe is disabled, according to
166 * register description and PRM.
168 DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
170 enc
->pfit_pgm_ratios
);
172 I915_WRITE(PFIT_PGM_RATIOS
, enc
->pfit_pgm_ratios
);
173 I915_WRITE(PFIT_CONTROL
, enc
->pfit_control
);
177 * Sets the power state for the panel.
179 static void intel_enable_lvds(struct intel_encoder
*encoder
)
181 struct drm_device
*dev
= encoder
->base
.dev
;
182 struct intel_lvds_encoder
*lvds_encoder
= to_lvds_encoder(&encoder
->base
);
183 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->base
.crtc
);
184 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
185 u32 ctl_reg
, stat_reg
;
187 if (HAS_PCH_SPLIT(dev
)) {
188 ctl_reg
= PCH_PP_CONTROL
;
189 stat_reg
= PCH_PP_STATUS
;
191 ctl_reg
= PP_CONTROL
;
192 stat_reg
= PP_STATUS
;
195 I915_WRITE(lvds_encoder
->reg
, I915_READ(lvds_encoder
->reg
) | LVDS_PORT_EN
);
197 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) | POWER_TARGET_ON
);
198 POSTING_READ(lvds_encoder
->reg
);
199 if (wait_for((I915_READ(stat_reg
) & PP_ON
) != 0, 1000))
200 DRM_ERROR("timed out waiting for panel to power on\n");
202 intel_panel_enable_backlight(dev
, intel_crtc
->pipe
);
205 static void intel_disable_lvds(struct intel_encoder
*encoder
)
207 struct drm_device
*dev
= encoder
->base
.dev
;
208 struct intel_lvds_encoder
*lvds_encoder
= to_lvds_encoder(&encoder
->base
);
209 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
210 u32 ctl_reg
, stat_reg
;
212 if (HAS_PCH_SPLIT(dev
)) {
213 ctl_reg
= PCH_PP_CONTROL
;
214 stat_reg
= PCH_PP_STATUS
;
216 ctl_reg
= PP_CONTROL
;
217 stat_reg
= PP_STATUS
;
220 intel_panel_disable_backlight(dev
);
222 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) & ~POWER_TARGET_ON
);
223 if (wait_for((I915_READ(stat_reg
) & PP_ON
) == 0, 1000))
224 DRM_ERROR("timed out waiting for panel to power off\n");
226 I915_WRITE(lvds_encoder
->reg
, I915_READ(lvds_encoder
->reg
) & ~LVDS_PORT_EN
);
227 POSTING_READ(lvds_encoder
->reg
);
230 static int intel_lvds_mode_valid(struct drm_connector
*connector
,
231 struct drm_display_mode
*mode
)
233 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
234 struct drm_display_mode
*fixed_mode
= intel_connector
->panel
.fixed_mode
;
236 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
238 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
245 centre_horizontally(struct drm_display_mode
*mode
,
248 u32 border
, sync_pos
, blank_width
, sync_width
;
250 /* keep the hsync and hblank widths constant */
251 sync_width
= mode
->crtc_hsync_end
- mode
->crtc_hsync_start
;
252 blank_width
= mode
->crtc_hblank_end
- mode
->crtc_hblank_start
;
253 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
255 border
= (mode
->hdisplay
- width
+ 1) / 2;
256 border
+= border
& 1; /* make the border even */
258 mode
->crtc_hdisplay
= width
;
259 mode
->crtc_hblank_start
= width
+ border
;
260 mode
->crtc_hblank_end
= mode
->crtc_hblank_start
+ blank_width
;
262 mode
->crtc_hsync_start
= mode
->crtc_hblank_start
+ sync_pos
;
263 mode
->crtc_hsync_end
= mode
->crtc_hsync_start
+ sync_width
;
265 mode
->private_flags
|= INTEL_MODE_CRTC_TIMINGS_SET
;
269 centre_vertically(struct drm_display_mode
*mode
,
272 u32 border
, sync_pos
, blank_width
, sync_width
;
274 /* keep the vsync and vblank widths constant */
275 sync_width
= mode
->crtc_vsync_end
- mode
->crtc_vsync_start
;
276 blank_width
= mode
->crtc_vblank_end
- mode
->crtc_vblank_start
;
277 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
279 border
= (mode
->vdisplay
- height
+ 1) / 2;
281 mode
->crtc_vdisplay
= height
;
282 mode
->crtc_vblank_start
= height
+ border
;
283 mode
->crtc_vblank_end
= mode
->crtc_vblank_start
+ blank_width
;
285 mode
->crtc_vsync_start
= mode
->crtc_vblank_start
+ sync_pos
;
286 mode
->crtc_vsync_end
= mode
->crtc_vsync_start
+ sync_width
;
288 mode
->private_flags
|= INTEL_MODE_CRTC_TIMINGS_SET
;
291 static inline u32
panel_fitter_scaling(u32 source
, u32 target
)
294 * Floating point operation is not supported. So the FACTOR
295 * is defined, which can avoid the floating point computation
296 * when calculating the panel ratio.
299 #define FACTOR (1 << ACCURACY)
300 u32 ratio
= source
* FACTOR
/ target
;
301 return (FACTOR
* ratio
+ FACTOR
/2) / FACTOR
;
304 static bool intel_lvds_mode_fixup(struct drm_encoder
*encoder
,
305 const struct drm_display_mode
*mode
,
306 struct drm_display_mode
*adjusted_mode
)
308 struct drm_device
*dev
= encoder
->dev
;
309 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
310 struct intel_lvds_encoder
*lvds_encoder
= to_lvds_encoder(encoder
);
311 struct intel_connector
*intel_connector
=
312 &lvds_encoder
->attached_connector
->base
;
313 struct intel_crtc
*intel_crtc
= lvds_encoder
->base
.new_crtc
;
314 u32 pfit_control
= 0, pfit_pgm_ratios
= 0, border
= 0;
317 /* Should never happen!! */
318 if (INTEL_INFO(dev
)->gen
< 4 && intel_crtc
->pipe
== 0) {
319 DRM_ERROR("Can't support LVDS on pipe A\n");
323 if (intel_encoder_check_is_cloned(&lvds_encoder
->base
))
327 * We have timings from the BIOS for the panel, put them in
328 * to the adjusted mode. The CRTC will be set up for this mode,
329 * with the panel scaling set up to source from the H/VDisplay
330 * of the original mode.
332 intel_fixed_panel_mode(intel_connector
->panel
.fixed_mode
,
335 if (HAS_PCH_SPLIT(dev
)) {
336 intel_pch_panel_fitting(dev
,
337 intel_connector
->panel
.fitting_mode
,
338 mode
, adjusted_mode
);
342 /* Native modes don't need fitting */
343 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
344 adjusted_mode
->vdisplay
== mode
->vdisplay
)
347 /* 965+ wants fuzzy fitting */
348 if (INTEL_INFO(dev
)->gen
>= 4)
349 pfit_control
|= ((intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
353 * Enable automatic panel scaling for non-native modes so that they fill
354 * the screen. Should be enabled before the pipe is enabled, according
355 * to register description and PRM.
356 * Change the value here to see the borders for debugging
359 I915_WRITE(BCLRPAT(pipe
), 0);
361 drm_mode_set_crtcinfo(adjusted_mode
, 0);
363 switch (intel_connector
->panel
.fitting_mode
) {
364 case DRM_MODE_SCALE_CENTER
:
366 * For centered modes, we have to calculate border widths &
367 * heights and modify the values programmed into the CRTC.
369 centre_horizontally(adjusted_mode
, mode
->hdisplay
);
370 centre_vertically(adjusted_mode
, mode
->vdisplay
);
371 border
= LVDS_BORDER_ENABLE
;
374 case DRM_MODE_SCALE_ASPECT
:
375 /* Scale but preserve the aspect ratio */
376 if (INTEL_INFO(dev
)->gen
>= 4) {
377 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
378 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
380 /* 965+ is easy, it does everything in hw */
381 if (scaled_width
> scaled_height
)
382 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_PILLAR
;
383 else if (scaled_width
< scaled_height
)
384 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_LETTER
;
385 else if (adjusted_mode
->hdisplay
!= mode
->hdisplay
)
386 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_AUTO
;
388 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
389 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
391 * For earlier chips we have to calculate the scaling
392 * ratio by hand and program it into the
393 * PFIT_PGM_RATIO register
395 if (scaled_width
> scaled_height
) { /* pillar */
396 centre_horizontally(adjusted_mode
, scaled_height
/ mode
->vdisplay
);
398 border
= LVDS_BORDER_ENABLE
;
399 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
) {
400 u32 bits
= panel_fitter_scaling(mode
->vdisplay
, adjusted_mode
->vdisplay
);
401 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
402 bits
<< PFIT_VERT_SCALE_SHIFT
);
403 pfit_control
|= (PFIT_ENABLE
|
404 VERT_INTERP_BILINEAR
|
405 HORIZ_INTERP_BILINEAR
);
407 } else if (scaled_width
< scaled_height
) { /* letter */
408 centre_vertically(adjusted_mode
, scaled_width
/ mode
->hdisplay
);
410 border
= LVDS_BORDER_ENABLE
;
411 if (mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
412 u32 bits
= panel_fitter_scaling(mode
->hdisplay
, adjusted_mode
->hdisplay
);
413 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
414 bits
<< PFIT_VERT_SCALE_SHIFT
);
415 pfit_control
|= (PFIT_ENABLE
|
416 VERT_INTERP_BILINEAR
|
417 HORIZ_INTERP_BILINEAR
);
420 /* Aspects match, Let hw scale both directions */
421 pfit_control
|= (PFIT_ENABLE
|
422 VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
423 VERT_INTERP_BILINEAR
|
424 HORIZ_INTERP_BILINEAR
);
428 case DRM_MODE_SCALE_FULLSCREEN
:
430 * Full scaling, even if it changes the aspect ratio.
431 * Fortunately this is all done for us in hw.
433 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
||
434 mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
435 pfit_control
|= PFIT_ENABLE
;
436 if (INTEL_INFO(dev
)->gen
>= 4)
437 pfit_control
|= PFIT_SCALING_AUTO
;
439 pfit_control
|= (VERT_AUTO_SCALE
|
440 VERT_INTERP_BILINEAR
|
442 HORIZ_INTERP_BILINEAR
);
451 /* If not enabling scaling, be consistent and always use 0. */
452 if ((pfit_control
& PFIT_ENABLE
) == 0) {
457 /* Make sure pre-965 set dither correctly */
458 if (INTEL_INFO(dev
)->gen
< 4 && dev_priv
->lvds_dither
)
459 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
461 if (pfit_control
!= lvds_encoder
->pfit_control
||
462 pfit_pgm_ratios
!= lvds_encoder
->pfit_pgm_ratios
) {
463 lvds_encoder
->pfit_control
= pfit_control
;
464 lvds_encoder
->pfit_pgm_ratios
= pfit_pgm_ratios
;
466 dev_priv
->lvds_border_bits
= border
;
469 * XXX: It would be nice to support lower refresh rates on the
470 * panels to reduce power consumption, and perhaps match the
471 * user's requested refresh rate.
477 static void intel_lvds_mode_set(struct drm_encoder
*encoder
,
478 struct drm_display_mode
*mode
,
479 struct drm_display_mode
*adjusted_mode
)
482 * The LVDS pin pair will already have been turned on in the
483 * intel_crtc_mode_set since it has a large impact on the DPLL
489 * Detect the LVDS connection.
491 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
492 * connected and closed means disconnected. We also send hotplug events as
493 * needed, using lid status notification from the input layer.
495 static enum drm_connector_status
496 intel_lvds_detect(struct drm_connector
*connector
, bool force
)
498 struct drm_device
*dev
= connector
->dev
;
499 enum drm_connector_status status
;
501 status
= intel_panel_detect(dev
);
502 if (status
!= connector_status_unknown
)
505 return connector_status_connected
;
509 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
511 static int intel_lvds_get_modes(struct drm_connector
*connector
)
513 struct intel_lvds_connector
*lvds_connector
= to_lvds_connector(connector
);
514 struct drm_device
*dev
= connector
->dev
;
515 struct drm_display_mode
*mode
;
517 /* use cached edid if we have one */
518 if (!IS_ERR_OR_NULL(lvds_connector
->base
.edid
))
519 return drm_add_edid_modes(connector
, lvds_connector
->base
.edid
);
521 mode
= drm_mode_duplicate(dev
, lvds_connector
->base
.panel
.fixed_mode
);
525 drm_mode_probed_add(connector
, mode
);
529 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id
*id
)
531 DRM_INFO("Skipping forced modeset for %s\n", id
->ident
);
535 /* The GPU hangs up on these systems if modeset is performed on LID open */
536 static const struct dmi_system_id intel_no_modeset_on_lid
[] = {
538 .callback
= intel_no_modeset_on_lid_dmi_callback
,
539 .ident
= "Toshiba Tecra A11",
541 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
542 DMI_MATCH(DMI_PRODUCT_NAME
, "TECRA A11"),
546 { } /* terminating entry */
550 * Lid events. Note the use of 'modeset':
551 * - we set it to MODESET_ON_LID_OPEN on lid close,
552 * and set it to MODESET_DONE on open
553 * - we use it as a "only once" bit (ie we ignore
554 * duplicate events where it was already properly set)
555 * - the suspend/resume paths will set it to
556 * MODESET_SUSPENDED and ignore the lid open event,
557 * because they restore the mode ("lid open").
559 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
562 struct intel_lvds_connector
*lvds_connector
=
563 container_of(nb
, struct intel_lvds_connector
, lid_notifier
);
564 struct drm_connector
*connector
= &lvds_connector
->base
.base
;
565 struct drm_device
*dev
= connector
->dev
;
566 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
568 if (dev
->switch_power_state
!= DRM_SWITCH_POWER_ON
)
571 mutex_lock(&dev_priv
->modeset_restore_lock
);
572 if (dev_priv
->modeset_restore
== MODESET_SUSPENDED
)
575 * check and update the status of LVDS connector after receiving
576 * the LID nofication event.
578 connector
->status
= connector
->funcs
->detect(connector
, false);
580 /* Don't force modeset on machines where it causes a GPU lockup */
581 if (dmi_check_system(intel_no_modeset_on_lid
))
583 if (!acpi_lid_open()) {
584 /* do modeset on next lid open event */
585 dev_priv
->modeset_restore
= MODESET_ON_LID_OPEN
;
589 if (dev_priv
->modeset_restore
== MODESET_DONE
)
592 drm_modeset_lock_all(dev
);
593 intel_modeset_setup_hw_state(dev
, true);
594 drm_modeset_unlock_all(dev
);
596 dev_priv
->modeset_restore
= MODESET_DONE
;
599 mutex_unlock(&dev_priv
->modeset_restore_lock
);
604 * intel_lvds_destroy - unregister and free LVDS structures
605 * @connector: connector to free
607 * Unregister the DDC bus for this connector then free the driver private
610 static void intel_lvds_destroy(struct drm_connector
*connector
)
612 struct intel_lvds_connector
*lvds_connector
=
613 to_lvds_connector(connector
);
615 if (lvds_connector
->lid_notifier
.notifier_call
)
616 acpi_lid_notifier_unregister(&lvds_connector
->lid_notifier
);
618 if (!IS_ERR_OR_NULL(lvds_connector
->base
.edid
))
619 kfree(lvds_connector
->base
.edid
);
621 intel_panel_destroy_backlight(connector
->dev
);
622 intel_panel_fini(&lvds_connector
->base
.panel
);
624 drm_sysfs_connector_remove(connector
);
625 drm_connector_cleanup(connector
);
629 static int intel_lvds_set_property(struct drm_connector
*connector
,
630 struct drm_property
*property
,
633 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
634 struct drm_device
*dev
= connector
->dev
;
636 if (property
== dev
->mode_config
.scaling_mode_property
) {
637 struct drm_crtc
*crtc
;
639 if (value
== DRM_MODE_SCALE_NONE
) {
640 DRM_DEBUG_KMS("no scaling not supported\n");
644 if (intel_connector
->panel
.fitting_mode
== value
) {
645 /* the LVDS scaling property is not changed */
648 intel_connector
->panel
.fitting_mode
= value
;
650 crtc
= intel_attached_encoder(connector
)->base
.crtc
;
651 if (crtc
&& crtc
->enabled
) {
653 * If the CRTC is enabled, the display will be changed
654 * according to the new panel fitting mode.
656 intel_crtc_restore_mode(crtc
);
663 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
664 .mode_fixup
= intel_lvds_mode_fixup
,
665 .mode_set
= intel_lvds_mode_set
,
668 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
669 .get_modes
= intel_lvds_get_modes
,
670 .mode_valid
= intel_lvds_mode_valid
,
671 .best_encoder
= intel_best_encoder
,
674 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
675 .dpms
= intel_connector_dpms
,
676 .detect
= intel_lvds_detect
,
677 .fill_modes
= drm_helper_probe_single_connector_modes
,
678 .set_property
= intel_lvds_set_property
,
679 .destroy
= intel_lvds_destroy
,
682 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
683 .destroy
= intel_encoder_destroy
,
686 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
688 DRM_INFO("Skipping LVDS initialization for %s\n", id
->ident
);
692 /* These systems claim to have LVDS, but really don't */
693 static const struct dmi_system_id intel_no_lvds
[] = {
695 .callback
= intel_no_lvds_dmi_callback
,
696 .ident
= "Apple Mac Mini (Core series)",
698 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
699 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
703 .callback
= intel_no_lvds_dmi_callback
,
704 .ident
= "Apple Mac Mini (Core 2 series)",
706 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
707 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
711 .callback
= intel_no_lvds_dmi_callback
,
712 .ident
= "MSI IM-945GSE-A",
714 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
715 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
719 .callback
= intel_no_lvds_dmi_callback
,
720 .ident
= "Dell Studio Hybrid",
722 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
723 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
727 .callback
= intel_no_lvds_dmi_callback
,
728 .ident
= "Dell OptiPlex FX170",
730 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
731 DMI_MATCH(DMI_PRODUCT_NAME
, "OptiPlex FX170"),
735 .callback
= intel_no_lvds_dmi_callback
,
736 .ident
= "AOpen Mini PC",
738 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
739 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
743 .callback
= intel_no_lvds_dmi_callback
,
744 .ident
= "AOpen Mini PC MP915",
746 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
747 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
751 .callback
= intel_no_lvds_dmi_callback
,
752 .ident
= "AOpen i915GMm-HFS",
754 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
755 DMI_MATCH(DMI_BOARD_NAME
, "i915GMm-HFS"),
759 .callback
= intel_no_lvds_dmi_callback
,
760 .ident
= "AOpen i45GMx-I",
762 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
763 DMI_MATCH(DMI_BOARD_NAME
, "i45GMx-I"),
767 .callback
= intel_no_lvds_dmi_callback
,
768 .ident
= "Aopen i945GTt-VFA",
770 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
774 .callback
= intel_no_lvds_dmi_callback
,
775 .ident
= "Clientron U800",
777 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
778 DMI_MATCH(DMI_PRODUCT_NAME
, "U800"),
782 .callback
= intel_no_lvds_dmi_callback
,
783 .ident
= "Clientron E830",
785 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
786 DMI_MATCH(DMI_PRODUCT_NAME
, "E830"),
790 .callback
= intel_no_lvds_dmi_callback
,
791 .ident
= "Asus EeeBox PC EB1007",
793 DMI_MATCH(DMI_SYS_VENDOR
, "ASUSTeK Computer INC."),
794 DMI_MATCH(DMI_PRODUCT_NAME
, "EB1007"),
798 .callback
= intel_no_lvds_dmi_callback
,
799 .ident
= "Asus AT5NM10T-I",
801 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
802 DMI_MATCH(DMI_BOARD_NAME
, "AT5NM10T-I"),
806 .callback
= intel_no_lvds_dmi_callback
,
807 .ident
= "Hewlett-Packard HP t5740e Thin Client",
809 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
810 DMI_MATCH(DMI_PRODUCT_NAME
, "HP t5740e Thin Client"),
814 .callback
= intel_no_lvds_dmi_callback
,
815 .ident
= "Hewlett-Packard t5745",
817 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
818 DMI_MATCH(DMI_PRODUCT_NAME
, "hp t5745"),
822 .callback
= intel_no_lvds_dmi_callback
,
823 .ident
= "Hewlett-Packard st5747",
825 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
826 DMI_MATCH(DMI_PRODUCT_NAME
, "hp st5747"),
830 .callback
= intel_no_lvds_dmi_callback
,
831 .ident
= "MSI Wind Box DC500",
833 DMI_MATCH(DMI_BOARD_VENDOR
, "MICRO-STAR INTERNATIONAL CO., LTD"),
834 DMI_MATCH(DMI_BOARD_NAME
, "MS-7469"),
838 .callback
= intel_no_lvds_dmi_callback
,
839 .ident
= "Gigabyte GA-D525TUD",
841 DMI_MATCH(DMI_BOARD_VENDOR
, "Gigabyte Technology Co., Ltd."),
842 DMI_MATCH(DMI_BOARD_NAME
, "D525TUD"),
846 .callback
= intel_no_lvds_dmi_callback
,
847 .ident
= "Supermicro X7SPA-H",
849 DMI_MATCH(DMI_SYS_VENDOR
, "Supermicro"),
850 DMI_MATCH(DMI_PRODUCT_NAME
, "X7SPA-H"),
854 { } /* terminating entry */
858 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
860 * @connector: LVDS connector
862 * Find the reduced downclock for LVDS in EDID.
864 static void intel_find_lvds_downclock(struct drm_device
*dev
,
865 struct drm_display_mode
*fixed_mode
,
866 struct drm_connector
*connector
)
868 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
869 struct drm_display_mode
*scan
;
872 temp_downclock
= fixed_mode
->clock
;
873 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
875 * If one mode has the same resolution with the fixed_panel
876 * mode while they have the different refresh rate, it means
877 * that the reduced downclock is found for the LVDS. In such
878 * case we can set the different FPx0/1 to dynamically select
879 * between low and high frequency.
881 if (scan
->hdisplay
== fixed_mode
->hdisplay
&&
882 scan
->hsync_start
== fixed_mode
->hsync_start
&&
883 scan
->hsync_end
== fixed_mode
->hsync_end
&&
884 scan
->htotal
== fixed_mode
->htotal
&&
885 scan
->vdisplay
== fixed_mode
->vdisplay
&&
886 scan
->vsync_start
== fixed_mode
->vsync_start
&&
887 scan
->vsync_end
== fixed_mode
->vsync_end
&&
888 scan
->vtotal
== fixed_mode
->vtotal
) {
889 if (scan
->clock
< temp_downclock
) {
891 * The downclock is already found. But we
892 * expect to find the lower downclock.
894 temp_downclock
= scan
->clock
;
898 if (temp_downclock
< fixed_mode
->clock
&& i915_lvds_downclock
) {
899 /* We found the downclock for LVDS. */
900 dev_priv
->lvds_downclock_avail
= 1;
901 dev_priv
->lvds_downclock
= temp_downclock
;
902 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
903 "Normal clock %dKhz, downclock %dKhz\n",
904 fixed_mode
->clock
, temp_downclock
);
909 * Enumerate the child dev array parsed from VBT to check whether
910 * the LVDS is present.
911 * If it is present, return 1.
912 * If it is not present, return false.
913 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
915 static bool lvds_is_present_in_vbt(struct drm_device
*dev
,
918 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
921 if (!dev_priv
->child_dev_num
)
924 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
925 struct child_device_config
*child
= dev_priv
->child_dev
+ i
;
927 /* If the device type is not LFP, continue.
928 * We have to check both the new identifiers as well as the
929 * old for compatibility with some BIOSes.
931 if (child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
932 child
->device_type
!= DEVICE_TYPE_LFP
)
935 if (intel_gmbus_is_port_valid(child
->i2c_pin
))
936 *i2c_pin
= child
->i2c_pin
;
938 /* However, we cannot trust the BIOS writers to populate
939 * the VBT correctly. Since LVDS requires additional
940 * information from AIM blocks, a non-zero addin offset is
941 * a good indicator that the LVDS is actually present.
943 if (child
->addin_offset
)
946 /* But even then some BIOS writers perform some black magic
947 * and instantiate the device without reference to any
948 * additional data. Trust that if the VBT was written into
949 * the OpRegion then they have validated the LVDS's existence.
951 if (dev_priv
->opregion
.vbt
)
958 static int intel_dual_link_lvds_callback(const struct dmi_system_id
*id
)
960 DRM_INFO("Forcing lvds to dual link mode on %s\n", id
->ident
);
964 static const struct dmi_system_id intel_dual_link_lvds
[] = {
966 .callback
= intel_dual_link_lvds_callback
,
967 .ident
= "Apple MacBook Pro (Core i5/i7 Series)",
969 DMI_MATCH(DMI_SYS_VENDOR
, "Apple Inc."),
970 DMI_MATCH(DMI_PRODUCT_NAME
, "MacBookPro8,2"),
973 { } /* terminating entry */
976 bool intel_is_dual_link_lvds(struct drm_device
*dev
)
978 struct intel_encoder
*encoder
;
979 struct intel_lvds_encoder
*lvds_encoder
;
981 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
,
983 if (encoder
->type
== INTEL_OUTPUT_LVDS
) {
984 lvds_encoder
= to_lvds_encoder(&encoder
->base
);
986 return lvds_encoder
->is_dual_link
;
993 static bool compute_is_dual_link_lvds(struct intel_lvds_encoder
*lvds_encoder
)
995 struct drm_device
*dev
= lvds_encoder
->base
.base
.dev
;
997 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
999 /* use the module option value if specified */
1000 if (i915_lvds_channel_mode
> 0)
1001 return i915_lvds_channel_mode
== 2;
1003 if (dmi_check_system(intel_dual_link_lvds
))
1006 /* BIOS should set the proper LVDS register value at boot, but
1007 * in reality, it doesn't set the value when the lid is closed;
1008 * we need to check "the value to be set" in VBT when LVDS
1009 * register is uninitialized.
1011 val
= I915_READ(lvds_encoder
->reg
);
1012 if (!(val
& ~(LVDS_PIPE_MASK
| LVDS_DETECTED
)))
1013 val
= dev_priv
->bios_lvds_val
;
1015 return (val
& LVDS_CLKB_POWER_MASK
) == LVDS_CLKB_POWER_UP
;
1018 static bool intel_lvds_supported(struct drm_device
*dev
)
1020 /* With the introduction of the PCH we gained a dedicated
1021 * LVDS presence pin, use it. */
1022 if (HAS_PCH_SPLIT(dev
))
1025 /* Otherwise LVDS was only attached to mobile products,
1026 * except for the inglorious 830gm */
1027 return IS_MOBILE(dev
) && !IS_I830(dev
);
1031 * intel_lvds_init - setup LVDS connectors on this device
1034 * Create the connector, register the LVDS DDC bus, and try to figure out what
1035 * modes we can display on the LVDS panel (if present).
1037 bool intel_lvds_init(struct drm_device
*dev
)
1039 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1040 struct intel_lvds_encoder
*lvds_encoder
;
1041 struct intel_encoder
*intel_encoder
;
1042 struct intel_lvds_connector
*lvds_connector
;
1043 struct intel_connector
*intel_connector
;
1044 struct drm_connector
*connector
;
1045 struct drm_encoder
*encoder
;
1046 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
1047 struct drm_display_mode
*fixed_mode
= NULL
;
1049 struct drm_crtc
*crtc
;
1054 if (!intel_lvds_supported(dev
))
1057 /* Skip init on machines we know falsely report LVDS */
1058 if (dmi_check_system(intel_no_lvds
))
1061 pin
= GMBUS_PORT_PANEL
;
1062 if (!lvds_is_present_in_vbt(dev
, &pin
)) {
1063 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
1067 if (HAS_PCH_SPLIT(dev
)) {
1068 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
1070 if (dev_priv
->edp
.support
) {
1071 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
1076 lvds_encoder
= kzalloc(sizeof(struct intel_lvds_encoder
), GFP_KERNEL
);
1080 lvds_connector
= kzalloc(sizeof(struct intel_lvds_connector
), GFP_KERNEL
);
1081 if (!lvds_connector
) {
1082 kfree(lvds_encoder
);
1086 lvds_encoder
->attached_connector
= lvds_connector
;
1088 if (!HAS_PCH_SPLIT(dev
)) {
1089 lvds_encoder
->pfit_control
= I915_READ(PFIT_CONTROL
);
1092 intel_encoder
= &lvds_encoder
->base
;
1093 encoder
= &intel_encoder
->base
;
1094 intel_connector
= &lvds_connector
->base
;
1095 connector
= &intel_connector
->base
;
1096 drm_connector_init(dev
, &intel_connector
->base
, &intel_lvds_connector_funcs
,
1097 DRM_MODE_CONNECTOR_LVDS
);
1099 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_lvds_enc_funcs
,
1100 DRM_MODE_ENCODER_LVDS
);
1102 intel_encoder
->enable
= intel_enable_lvds
;
1103 intel_encoder
->pre_enable
= intel_pre_enable_lvds
;
1104 intel_encoder
->pre_pll_enable
= intel_pre_pll_enable_lvds
;
1105 intel_encoder
->disable
= intel_disable_lvds
;
1106 intel_encoder
->get_hw_state
= intel_lvds_get_hw_state
;
1107 intel_connector
->get_hw_state
= intel_connector_get_hw_state
;
1109 intel_connector_attach_encoder(intel_connector
, intel_encoder
);
1110 intel_encoder
->type
= INTEL_OUTPUT_LVDS
;
1112 intel_encoder
->cloneable
= false;
1113 if (HAS_PCH_SPLIT(dev
))
1114 intel_encoder
->crtc_mask
= (1 << 0) | (1 << 1) | (1 << 2);
1115 else if (IS_GEN4(dev
))
1116 intel_encoder
->crtc_mask
= (1 << 0) | (1 << 1);
1118 intel_encoder
->crtc_mask
= (1 << 1);
1120 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
1121 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
1122 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
1123 connector
->interlace_allowed
= false;
1124 connector
->doublescan_allowed
= false;
1126 if (HAS_PCH_SPLIT(dev
)) {
1127 lvds_encoder
->reg
= PCH_LVDS
;
1129 lvds_encoder
->reg
= LVDS
;
1132 /* create the scaling mode property */
1133 drm_mode_create_scaling_mode_property(dev
);
1134 drm_object_attach_property(&connector
->base
,
1135 dev
->mode_config
.scaling_mode_property
,
1136 DRM_MODE_SCALE_ASPECT
);
1137 intel_connector
->panel
.fitting_mode
= DRM_MODE_SCALE_ASPECT
;
1140 * 1) check for EDID on DDC
1141 * 2) check for VBT data
1142 * 3) check to see if LVDS is already on
1143 * if none of the above, no panel
1144 * 4) make sure lid is open
1145 * if closed, act like it's not there for now
1149 * Attempt to get the fixed panel mode from DDC. Assume that the
1150 * preferred mode is the right one.
1152 edid
= drm_get_edid(connector
, intel_gmbus_get_adapter(dev_priv
, pin
));
1154 if (drm_add_edid_modes(connector
, edid
)) {
1155 drm_mode_connector_update_edid_property(connector
,
1159 edid
= ERR_PTR(-EINVAL
);
1162 edid
= ERR_PTR(-ENOENT
);
1164 lvds_connector
->base
.edid
= edid
;
1166 if (IS_ERR_OR_NULL(edid
)) {
1167 /* Didn't get an EDID, so
1168 * Set wide sync ranges so we get all modes
1169 * handed to valid_mode for checking
1171 connector
->display_info
.min_vfreq
= 0;
1172 connector
->display_info
.max_vfreq
= 200;
1173 connector
->display_info
.min_hfreq
= 0;
1174 connector
->display_info
.max_hfreq
= 200;
1177 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
1178 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
1179 DRM_DEBUG_KMS("using preferred mode from EDID: ");
1180 drm_mode_debug_printmodeline(scan
);
1182 fixed_mode
= drm_mode_duplicate(dev
, scan
);
1184 intel_find_lvds_downclock(dev
, fixed_mode
,
1191 /* Failed to get EDID, what about VBT? */
1192 if (dev_priv
->lfp_lvds_vbt_mode
) {
1193 DRM_DEBUG_KMS("using mode from VBT: ");
1194 drm_mode_debug_printmodeline(dev_priv
->lfp_lvds_vbt_mode
);
1196 fixed_mode
= drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
1198 fixed_mode
->type
|= DRM_MODE_TYPE_PREFERRED
;
1204 * If we didn't get EDID, try checking if the panel is already turned
1205 * on. If so, assume that whatever is currently programmed is the
1209 /* Ironlake: FIXME if still fail, not try pipe mode now */
1210 if (HAS_PCH_SPLIT(dev
))
1213 lvds
= I915_READ(LVDS
);
1214 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
1215 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
1217 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
1218 fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
1220 DRM_DEBUG_KMS("using current (BIOS) mode: ");
1221 drm_mode_debug_printmodeline(fixed_mode
);
1222 fixed_mode
->type
|= DRM_MODE_TYPE_PREFERRED
;
1227 /* If we still don't have a mode after all that, give up. */
1232 lvds_encoder
->is_dual_link
= compute_is_dual_link_lvds(lvds_encoder
);
1233 DRM_DEBUG_KMS("detected %s-link lvds configuration\n",
1234 lvds_encoder
->is_dual_link
? "dual" : "single");
1237 * Unlock registers and just
1238 * leave them unlocked
1240 if (HAS_PCH_SPLIT(dev
)) {
1241 I915_WRITE(PCH_PP_CONTROL
,
1242 I915_READ(PCH_PP_CONTROL
) | PANEL_UNLOCK_REGS
);
1244 I915_WRITE(PP_CONTROL
,
1245 I915_READ(PP_CONTROL
) | PANEL_UNLOCK_REGS
);
1247 lvds_connector
->lid_notifier
.notifier_call
= intel_lid_notify
;
1248 if (acpi_lid_notifier_register(&lvds_connector
->lid_notifier
)) {
1249 DRM_DEBUG_KMS("lid notifier registration failed\n");
1250 lvds_connector
->lid_notifier
.notifier_call
= NULL
;
1252 drm_sysfs_connector_add(connector
);
1254 intel_panel_init(&intel_connector
->panel
, fixed_mode
);
1255 intel_panel_setup_backlight(connector
);
1260 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1261 drm_connector_cleanup(connector
);
1262 drm_encoder_cleanup(encoder
);
1264 drm_mode_destroy(dev
, fixed_mode
);
1265 kfree(lvds_encoder
);
1266 kfree(lvds_connector
);