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
;
58 struct intel_lvds_connector
*attached_connector
;
61 static struct intel_lvds_encoder
*to_lvds_encoder(struct drm_encoder
*encoder
)
63 return container_of(encoder
, struct intel_lvds_encoder
, base
.base
);
66 static struct intel_lvds_connector
*to_lvds_connector(struct drm_connector
*connector
)
68 return container_of(connector
, struct intel_lvds_connector
, base
.base
);
71 static bool intel_lvds_get_hw_state(struct intel_encoder
*encoder
,
74 struct drm_device
*dev
= encoder
->base
.dev
;
75 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
76 struct intel_lvds_encoder
*lvds_encoder
= to_lvds_encoder(&encoder
->base
);
79 tmp
= I915_READ(lvds_encoder
->reg
);
81 if (!(tmp
& LVDS_PORT_EN
))
85 *pipe
= PORT_TO_PIPE_CPT(tmp
);
87 *pipe
= PORT_TO_PIPE(tmp
);
92 /* The LVDS pin pair needs to be on before the DPLLs are enabled.
93 * This is an exception to the general rule that mode_set doesn't turn
96 static void intel_pre_pll_enable_lvds(struct intel_encoder
*encoder
)
98 struct intel_lvds_encoder
*lvds_encoder
= to_lvds_encoder(&encoder
->base
);
99 struct drm_device
*dev
= encoder
->base
.dev
;
100 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
101 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->base
.crtc
);
102 struct drm_display_mode
*fixed_mode
=
103 lvds_encoder
->attached_connector
->base
.panel
.fixed_mode
;
104 int pipe
= intel_crtc
->pipe
;
107 temp
= I915_READ(lvds_encoder
->reg
);
108 temp
|= LVDS_PORT_EN
| LVDS_A0A2_CLKA_POWER_UP
;
110 if (HAS_PCH_CPT(dev
)) {
111 temp
&= ~PORT_TRANS_SEL_MASK
;
112 temp
|= PORT_TRANS_SEL_CPT(pipe
);
115 temp
|= LVDS_PIPEB_SELECT
;
117 temp
&= ~LVDS_PIPEB_SELECT
;
121 /* set the corresponsding LVDS_BORDER bit */
122 temp
|= dev_priv
->lvds_border_bits
;
123 /* Set the B0-B3 data pairs corresponding to whether we're going to
124 * set the DPLLs for dual-channel mode or not.
126 if (lvds_encoder
->is_dual_link
)
127 temp
|= LVDS_B0B3_POWER_UP
| LVDS_CLKB_POWER_UP
;
129 temp
&= ~(LVDS_B0B3_POWER_UP
| LVDS_CLKB_POWER_UP
);
131 /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
132 * appropriately here, but we need to look more thoroughly into how
133 * panels behave in the two modes.
136 /* Set the dithering flag on LVDS as needed, note that there is no
137 * special lvds dither control bit on pch-split platforms, dithering is
138 * only controlled through the PIPECONF reg. */
139 if (INTEL_INFO(dev
)->gen
== 4) {
140 if (dev_priv
->lvds_dither
)
141 temp
|= LVDS_ENABLE_DITHER
;
143 temp
&= ~LVDS_ENABLE_DITHER
;
145 temp
&= ~(LVDS_HSYNC_POLARITY
| LVDS_VSYNC_POLARITY
);
146 if (fixed_mode
->flags
& DRM_MODE_FLAG_NHSYNC
)
147 temp
|= LVDS_HSYNC_POLARITY
;
148 if (fixed_mode
->flags
& DRM_MODE_FLAG_NVSYNC
)
149 temp
|= LVDS_VSYNC_POLARITY
;
151 I915_WRITE(lvds_encoder
->reg
, temp
);
155 * Sets the power state for the panel.
157 static void intel_enable_lvds(struct intel_encoder
*encoder
)
159 struct drm_device
*dev
= encoder
->base
.dev
;
160 struct intel_lvds_encoder
*lvds_encoder
= to_lvds_encoder(&encoder
->base
);
161 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->base
.crtc
);
162 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
163 u32 ctl_reg
, stat_reg
;
165 if (HAS_PCH_SPLIT(dev
)) {
166 ctl_reg
= PCH_PP_CONTROL
;
167 stat_reg
= PCH_PP_STATUS
;
169 ctl_reg
= PP_CONTROL
;
170 stat_reg
= PP_STATUS
;
173 I915_WRITE(lvds_encoder
->reg
, I915_READ(lvds_encoder
->reg
) | LVDS_PORT_EN
);
175 if (lvds_encoder
->pfit_dirty
) {
177 * Enable automatic panel scaling so that non-native modes
178 * fill the screen. The panel fitter should only be
179 * adjusted whilst the pipe is disabled, according to
180 * register description and PRM.
182 DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
183 lvds_encoder
->pfit_control
,
184 lvds_encoder
->pfit_pgm_ratios
);
186 I915_WRITE(PFIT_PGM_RATIOS
, lvds_encoder
->pfit_pgm_ratios
);
187 I915_WRITE(PFIT_CONTROL
, lvds_encoder
->pfit_control
);
188 lvds_encoder
->pfit_dirty
= false;
191 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) | POWER_TARGET_ON
);
192 POSTING_READ(lvds_encoder
->reg
);
193 if (wait_for((I915_READ(stat_reg
) & PP_ON
) != 0, 1000))
194 DRM_ERROR("timed out waiting for panel to power on\n");
196 intel_panel_enable_backlight(dev
, intel_crtc
->pipe
);
199 static void intel_disable_lvds(struct intel_encoder
*encoder
)
201 struct drm_device
*dev
= encoder
->base
.dev
;
202 struct intel_lvds_encoder
*lvds_encoder
= to_lvds_encoder(&encoder
->base
);
203 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
204 u32 ctl_reg
, stat_reg
;
206 if (HAS_PCH_SPLIT(dev
)) {
207 ctl_reg
= PCH_PP_CONTROL
;
208 stat_reg
= PCH_PP_STATUS
;
210 ctl_reg
= PP_CONTROL
;
211 stat_reg
= PP_STATUS
;
214 intel_panel_disable_backlight(dev
);
216 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) & ~POWER_TARGET_ON
);
217 if (wait_for((I915_READ(stat_reg
) & PP_ON
) == 0, 1000))
218 DRM_ERROR("timed out waiting for panel to power off\n");
220 if (lvds_encoder
->pfit_control
) {
221 I915_WRITE(PFIT_CONTROL
, 0);
222 lvds_encoder
->pfit_dirty
= true;
225 I915_WRITE(lvds_encoder
->reg
, I915_READ(lvds_encoder
->reg
) & ~LVDS_PORT_EN
);
226 POSTING_READ(lvds_encoder
->reg
);
229 static int intel_lvds_mode_valid(struct drm_connector
*connector
,
230 struct drm_display_mode
*mode
)
232 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
233 struct drm_display_mode
*fixed_mode
= intel_connector
->panel
.fixed_mode
;
235 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
237 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
244 centre_horizontally(struct drm_display_mode
*mode
,
247 u32 border
, sync_pos
, blank_width
, sync_width
;
249 /* keep the hsync and hblank widths constant */
250 sync_width
= mode
->crtc_hsync_end
- mode
->crtc_hsync_start
;
251 blank_width
= mode
->crtc_hblank_end
- mode
->crtc_hblank_start
;
252 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
254 border
= (mode
->hdisplay
- width
+ 1) / 2;
255 border
+= border
& 1; /* make the border even */
257 mode
->crtc_hdisplay
= width
;
258 mode
->crtc_hblank_start
= width
+ border
;
259 mode
->crtc_hblank_end
= mode
->crtc_hblank_start
+ blank_width
;
261 mode
->crtc_hsync_start
= mode
->crtc_hblank_start
+ sync_pos
;
262 mode
->crtc_hsync_end
= mode
->crtc_hsync_start
+ sync_width
;
264 mode
->private_flags
|= INTEL_MODE_CRTC_TIMINGS_SET
;
268 centre_vertically(struct drm_display_mode
*mode
,
271 u32 border
, sync_pos
, blank_width
, sync_width
;
273 /* keep the vsync and vblank widths constant */
274 sync_width
= mode
->crtc_vsync_end
- mode
->crtc_vsync_start
;
275 blank_width
= mode
->crtc_vblank_end
- mode
->crtc_vblank_start
;
276 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
278 border
= (mode
->vdisplay
- height
+ 1) / 2;
280 mode
->crtc_vdisplay
= height
;
281 mode
->crtc_vblank_start
= height
+ border
;
282 mode
->crtc_vblank_end
= mode
->crtc_vblank_start
+ blank_width
;
284 mode
->crtc_vsync_start
= mode
->crtc_vblank_start
+ sync_pos
;
285 mode
->crtc_vsync_end
= mode
->crtc_vsync_start
+ sync_width
;
287 mode
->private_flags
|= INTEL_MODE_CRTC_TIMINGS_SET
;
290 static inline u32
panel_fitter_scaling(u32 source
, u32 target
)
293 * Floating point operation is not supported. So the FACTOR
294 * is defined, which can avoid the floating point computation
295 * when calculating the panel ratio.
298 #define FACTOR (1 << ACCURACY)
299 u32 ratio
= source
* FACTOR
/ target
;
300 return (FACTOR
* ratio
+ FACTOR
/2) / FACTOR
;
303 static bool intel_lvds_mode_fixup(struct drm_encoder
*encoder
,
304 const struct drm_display_mode
*mode
,
305 struct drm_display_mode
*adjusted_mode
)
307 struct drm_device
*dev
= encoder
->dev
;
308 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
309 struct intel_lvds_encoder
*lvds_encoder
= to_lvds_encoder(encoder
);
310 struct intel_connector
*intel_connector
=
311 &lvds_encoder
->attached_connector
->base
;
312 struct intel_crtc
*intel_crtc
= lvds_encoder
->base
.new_crtc
;
313 u32 pfit_control
= 0, pfit_pgm_ratios
= 0, border
= 0;
316 /* Should never happen!! */
317 if (INTEL_INFO(dev
)->gen
< 4 && intel_crtc
->pipe
== 0) {
318 DRM_ERROR("Can't support LVDS on pipe A\n");
322 if (intel_encoder_check_is_cloned(&lvds_encoder
->base
))
326 * We have timings from the BIOS for the panel, put them in
327 * to the adjusted mode. The CRTC will be set up for this mode,
328 * with the panel scaling set up to source from the H/VDisplay
329 * of the original mode.
331 intel_fixed_panel_mode(intel_connector
->panel
.fixed_mode
,
334 if (HAS_PCH_SPLIT(dev
)) {
335 intel_pch_panel_fitting(dev
,
336 intel_connector
->panel
.fitting_mode
,
337 mode
, adjusted_mode
);
341 /* Native modes don't need fitting */
342 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
343 adjusted_mode
->vdisplay
== mode
->vdisplay
)
346 /* 965+ wants fuzzy fitting */
347 if (INTEL_INFO(dev
)->gen
>= 4)
348 pfit_control
|= ((intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
352 * Enable automatic panel scaling for non-native modes so that they fill
353 * the screen. Should be enabled before the pipe is enabled, according
354 * to register description and PRM.
355 * Change the value here to see the borders for debugging
358 I915_WRITE(BCLRPAT(pipe
), 0);
360 drm_mode_set_crtcinfo(adjusted_mode
, 0);
362 switch (intel_connector
->panel
.fitting_mode
) {
363 case DRM_MODE_SCALE_CENTER
:
365 * For centered modes, we have to calculate border widths &
366 * heights and modify the values programmed into the CRTC.
368 centre_horizontally(adjusted_mode
, mode
->hdisplay
);
369 centre_vertically(adjusted_mode
, mode
->vdisplay
);
370 border
= LVDS_BORDER_ENABLE
;
373 case DRM_MODE_SCALE_ASPECT
:
374 /* Scale but preserve the aspect ratio */
375 if (INTEL_INFO(dev
)->gen
>= 4) {
376 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
377 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
379 /* 965+ is easy, it does everything in hw */
380 if (scaled_width
> scaled_height
)
381 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_PILLAR
;
382 else if (scaled_width
< scaled_height
)
383 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_LETTER
;
384 else if (adjusted_mode
->hdisplay
!= mode
->hdisplay
)
385 pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_AUTO
;
387 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
388 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
390 * For earlier chips we have to calculate the scaling
391 * ratio by hand and program it into the
392 * PFIT_PGM_RATIO register
394 if (scaled_width
> scaled_height
) { /* pillar */
395 centre_horizontally(adjusted_mode
, scaled_height
/ mode
->vdisplay
);
397 border
= LVDS_BORDER_ENABLE
;
398 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
) {
399 u32 bits
= panel_fitter_scaling(mode
->vdisplay
, adjusted_mode
->vdisplay
);
400 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
401 bits
<< PFIT_VERT_SCALE_SHIFT
);
402 pfit_control
|= (PFIT_ENABLE
|
403 VERT_INTERP_BILINEAR
|
404 HORIZ_INTERP_BILINEAR
);
406 } else if (scaled_width
< scaled_height
) { /* letter */
407 centre_vertically(adjusted_mode
, scaled_width
/ mode
->hdisplay
);
409 border
= LVDS_BORDER_ENABLE
;
410 if (mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
411 u32 bits
= panel_fitter_scaling(mode
->hdisplay
, adjusted_mode
->hdisplay
);
412 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
413 bits
<< PFIT_VERT_SCALE_SHIFT
);
414 pfit_control
|= (PFIT_ENABLE
|
415 VERT_INTERP_BILINEAR
|
416 HORIZ_INTERP_BILINEAR
);
419 /* Aspects match, Let hw scale both directions */
420 pfit_control
|= (PFIT_ENABLE
|
421 VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
422 VERT_INTERP_BILINEAR
|
423 HORIZ_INTERP_BILINEAR
);
427 case DRM_MODE_SCALE_FULLSCREEN
:
429 * Full scaling, even if it changes the aspect ratio.
430 * Fortunately this is all done for us in hw.
432 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
||
433 mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
434 pfit_control
|= PFIT_ENABLE
;
435 if (INTEL_INFO(dev
)->gen
>= 4)
436 pfit_control
|= PFIT_SCALING_AUTO
;
438 pfit_control
|= (VERT_AUTO_SCALE
|
439 VERT_INTERP_BILINEAR
|
441 HORIZ_INTERP_BILINEAR
);
450 /* If not enabling scaling, be consistent and always use 0. */
451 if ((pfit_control
& PFIT_ENABLE
) == 0) {
456 /* Make sure pre-965 set dither correctly */
457 if (INTEL_INFO(dev
)->gen
< 4 && dev_priv
->lvds_dither
)
458 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
460 if (pfit_control
!= lvds_encoder
->pfit_control
||
461 pfit_pgm_ratios
!= lvds_encoder
->pfit_pgm_ratios
) {
462 lvds_encoder
->pfit_control
= pfit_control
;
463 lvds_encoder
->pfit_pgm_ratios
= pfit_pgm_ratios
;
464 lvds_encoder
->pfit_dirty
= true;
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_on_lid':
551 * - we set it on lid close, and reset it on open
552 * - we use it as a "only once" bit (ie we ignore
553 * duplicate events where it was already properly
555 * - the suspend/resume paths will also set it to
556 * zero, since they restore the mode ("lid open").
558 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
561 struct intel_lvds_connector
*lvds_connector
=
562 container_of(nb
, struct intel_lvds_connector
, lid_notifier
);
563 struct drm_connector
*connector
= &lvds_connector
->base
.base
;
564 struct drm_device
*dev
= connector
->dev
;
565 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
567 if (dev
->switch_power_state
!= DRM_SWITCH_POWER_ON
)
571 * check and update the status of LVDS connector after receiving
572 * the LID nofication event.
574 connector
->status
= connector
->funcs
->detect(connector
, false);
576 /* Don't force modeset on machines where it causes a GPU lockup */
577 if (dmi_check_system(intel_no_modeset_on_lid
))
579 if (!acpi_lid_open()) {
580 dev_priv
->modeset_on_lid
= 1;
584 if (!dev_priv
->modeset_on_lid
)
587 dev_priv
->modeset_on_lid
= 0;
589 drm_modeset_lock_all(dev
);
590 intel_modeset_setup_hw_state(dev
, true);
591 drm_modeset_unlock_all(dev
);
597 * intel_lvds_destroy - unregister and free LVDS structures
598 * @connector: connector to free
600 * Unregister the DDC bus for this connector then free the driver private
603 static void intel_lvds_destroy(struct drm_connector
*connector
)
605 struct intel_lvds_connector
*lvds_connector
=
606 to_lvds_connector(connector
);
608 if (lvds_connector
->lid_notifier
.notifier_call
)
609 acpi_lid_notifier_unregister(&lvds_connector
->lid_notifier
);
611 if (!IS_ERR_OR_NULL(lvds_connector
->base
.edid
))
612 kfree(lvds_connector
->base
.edid
);
614 intel_panel_destroy_backlight(connector
->dev
);
615 intel_panel_fini(&lvds_connector
->base
.panel
);
617 drm_sysfs_connector_remove(connector
);
618 drm_connector_cleanup(connector
);
622 static int intel_lvds_set_property(struct drm_connector
*connector
,
623 struct drm_property
*property
,
626 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
627 struct drm_device
*dev
= connector
->dev
;
629 if (property
== dev
->mode_config
.scaling_mode_property
) {
630 struct drm_crtc
*crtc
;
632 if (value
== DRM_MODE_SCALE_NONE
) {
633 DRM_DEBUG_KMS("no scaling not supported\n");
637 if (intel_connector
->panel
.fitting_mode
== value
) {
638 /* the LVDS scaling property is not changed */
641 intel_connector
->panel
.fitting_mode
= value
;
643 crtc
= intel_attached_encoder(connector
)->base
.crtc
;
644 if (crtc
&& crtc
->enabled
) {
646 * If the CRTC is enabled, the display will be changed
647 * according to the new panel fitting mode.
649 intel_crtc_restore_mode(crtc
);
656 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
657 .mode_fixup
= intel_lvds_mode_fixup
,
658 .mode_set
= intel_lvds_mode_set
,
659 .disable
= intel_encoder_noop
,
662 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
663 .get_modes
= intel_lvds_get_modes
,
664 .mode_valid
= intel_lvds_mode_valid
,
665 .best_encoder
= intel_best_encoder
,
668 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
669 .dpms
= intel_connector_dpms
,
670 .detect
= intel_lvds_detect
,
671 .fill_modes
= drm_helper_probe_single_connector_modes
,
672 .set_property
= intel_lvds_set_property
,
673 .destroy
= intel_lvds_destroy
,
676 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
677 .destroy
= intel_encoder_destroy
,
680 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
682 DRM_INFO("Skipping LVDS initialization for %s\n", id
->ident
);
686 /* These systems claim to have LVDS, but really don't */
687 static const struct dmi_system_id intel_no_lvds
[] = {
689 .callback
= intel_no_lvds_dmi_callback
,
690 .ident
= "Apple Mac Mini (Core series)",
692 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
693 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
697 .callback
= intel_no_lvds_dmi_callback
,
698 .ident
= "Apple Mac Mini (Core 2 series)",
700 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
701 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
705 .callback
= intel_no_lvds_dmi_callback
,
706 .ident
= "MSI IM-945GSE-A",
708 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
709 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
713 .callback
= intel_no_lvds_dmi_callback
,
714 .ident
= "Dell Studio Hybrid",
716 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
717 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
721 .callback
= intel_no_lvds_dmi_callback
,
722 .ident
= "Dell OptiPlex FX170",
724 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
725 DMI_MATCH(DMI_PRODUCT_NAME
, "OptiPlex FX170"),
729 .callback
= intel_no_lvds_dmi_callback
,
730 .ident
= "AOpen Mini PC",
732 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
733 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
737 .callback
= intel_no_lvds_dmi_callback
,
738 .ident
= "AOpen Mini PC MP915",
740 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
741 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
745 .callback
= intel_no_lvds_dmi_callback
,
746 .ident
= "AOpen i915GMm-HFS",
748 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
749 DMI_MATCH(DMI_BOARD_NAME
, "i915GMm-HFS"),
753 .callback
= intel_no_lvds_dmi_callback
,
754 .ident
= "AOpen i45GMx-I",
756 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
757 DMI_MATCH(DMI_BOARD_NAME
, "i45GMx-I"),
761 .callback
= intel_no_lvds_dmi_callback
,
762 .ident
= "Aopen i945GTt-VFA",
764 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
768 .callback
= intel_no_lvds_dmi_callback
,
769 .ident
= "Clientron U800",
771 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
772 DMI_MATCH(DMI_PRODUCT_NAME
, "U800"),
776 .callback
= intel_no_lvds_dmi_callback
,
777 .ident
= "Clientron E830",
779 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
780 DMI_MATCH(DMI_PRODUCT_NAME
, "E830"),
784 .callback
= intel_no_lvds_dmi_callback
,
785 .ident
= "Asus EeeBox PC EB1007",
787 DMI_MATCH(DMI_SYS_VENDOR
, "ASUSTeK Computer INC."),
788 DMI_MATCH(DMI_PRODUCT_NAME
, "EB1007"),
792 .callback
= intel_no_lvds_dmi_callback
,
793 .ident
= "Asus AT5NM10T-I",
795 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
796 DMI_MATCH(DMI_BOARD_NAME
, "AT5NM10T-I"),
800 .callback
= intel_no_lvds_dmi_callback
,
801 .ident
= "Hewlett-Packard HP t5740e Thin Client",
803 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
804 DMI_MATCH(DMI_PRODUCT_NAME
, "HP t5740e Thin Client"),
808 .callback
= intel_no_lvds_dmi_callback
,
809 .ident
= "Hewlett-Packard t5745",
811 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
812 DMI_MATCH(DMI_PRODUCT_NAME
, "hp t5745"),
816 .callback
= intel_no_lvds_dmi_callback
,
817 .ident
= "Hewlett-Packard st5747",
819 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
820 DMI_MATCH(DMI_PRODUCT_NAME
, "hp st5747"),
824 .callback
= intel_no_lvds_dmi_callback
,
825 .ident
= "MSI Wind Box DC500",
827 DMI_MATCH(DMI_BOARD_VENDOR
, "MICRO-STAR INTERNATIONAL CO., LTD"),
828 DMI_MATCH(DMI_BOARD_NAME
, "MS-7469"),
832 .callback
= intel_no_lvds_dmi_callback
,
833 .ident
= "Gigabyte GA-D525TUD",
835 DMI_MATCH(DMI_BOARD_VENDOR
, "Gigabyte Technology Co., Ltd."),
836 DMI_MATCH(DMI_BOARD_NAME
, "D525TUD"),
840 .callback
= intel_no_lvds_dmi_callback
,
841 .ident
= "Supermicro X7SPA-H",
843 DMI_MATCH(DMI_SYS_VENDOR
, "Supermicro"),
844 DMI_MATCH(DMI_PRODUCT_NAME
, "X7SPA-H"),
848 { } /* terminating entry */
852 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
854 * @connector: LVDS connector
856 * Find the reduced downclock for LVDS in EDID.
858 static void intel_find_lvds_downclock(struct drm_device
*dev
,
859 struct drm_display_mode
*fixed_mode
,
860 struct drm_connector
*connector
)
862 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
863 struct drm_display_mode
*scan
;
866 temp_downclock
= fixed_mode
->clock
;
867 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
869 * If one mode has the same resolution with the fixed_panel
870 * mode while they have the different refresh rate, it means
871 * that the reduced downclock is found for the LVDS. In such
872 * case we can set the different FPx0/1 to dynamically select
873 * between low and high frequency.
875 if (scan
->hdisplay
== fixed_mode
->hdisplay
&&
876 scan
->hsync_start
== fixed_mode
->hsync_start
&&
877 scan
->hsync_end
== fixed_mode
->hsync_end
&&
878 scan
->htotal
== fixed_mode
->htotal
&&
879 scan
->vdisplay
== fixed_mode
->vdisplay
&&
880 scan
->vsync_start
== fixed_mode
->vsync_start
&&
881 scan
->vsync_end
== fixed_mode
->vsync_end
&&
882 scan
->vtotal
== fixed_mode
->vtotal
) {
883 if (scan
->clock
< temp_downclock
) {
885 * The downclock is already found. But we
886 * expect to find the lower downclock.
888 temp_downclock
= scan
->clock
;
892 if (temp_downclock
< fixed_mode
->clock
&& i915_lvds_downclock
) {
893 /* We found the downclock for LVDS. */
894 dev_priv
->lvds_downclock_avail
= 1;
895 dev_priv
->lvds_downclock
= temp_downclock
;
896 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
897 "Normal clock %dKhz, downclock %dKhz\n",
898 fixed_mode
->clock
, temp_downclock
);
903 * Enumerate the child dev array parsed from VBT to check whether
904 * the LVDS is present.
905 * If it is present, return 1.
906 * If it is not present, return false.
907 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
909 static bool lvds_is_present_in_vbt(struct drm_device
*dev
,
912 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
915 if (!dev_priv
->child_dev_num
)
918 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
919 struct child_device_config
*child
= dev_priv
->child_dev
+ i
;
921 /* If the device type is not LFP, continue.
922 * We have to check both the new identifiers as well as the
923 * old for compatibility with some BIOSes.
925 if (child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
926 child
->device_type
!= DEVICE_TYPE_LFP
)
929 if (intel_gmbus_is_port_valid(child
->i2c_pin
))
930 *i2c_pin
= child
->i2c_pin
;
932 /* However, we cannot trust the BIOS writers to populate
933 * the VBT correctly. Since LVDS requires additional
934 * information from AIM blocks, a non-zero addin offset is
935 * a good indicator that the LVDS is actually present.
937 if (child
->addin_offset
)
940 /* But even then some BIOS writers perform some black magic
941 * and instantiate the device without reference to any
942 * additional data. Trust that if the VBT was written into
943 * the OpRegion then they have validated the LVDS's existence.
945 if (dev_priv
->opregion
.vbt
)
952 static int intel_dual_link_lvds_callback(const struct dmi_system_id
*id
)
954 DRM_INFO("Forcing lvds to dual link mode on %s\n", id
->ident
);
958 static const struct dmi_system_id intel_dual_link_lvds
[] = {
960 .callback
= intel_dual_link_lvds_callback
,
961 .ident
= "Apple MacBook Pro (Core i5/i7 Series)",
963 DMI_MATCH(DMI_SYS_VENDOR
, "Apple Inc."),
964 DMI_MATCH(DMI_PRODUCT_NAME
, "MacBookPro8,2"),
967 { } /* terminating entry */
970 bool intel_is_dual_link_lvds(struct drm_device
*dev
)
972 struct intel_encoder
*encoder
;
973 struct intel_lvds_encoder
*lvds_encoder
;
975 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
,
977 if (encoder
->type
== INTEL_OUTPUT_LVDS
) {
978 lvds_encoder
= to_lvds_encoder(&encoder
->base
);
980 return lvds_encoder
->is_dual_link
;
987 static bool compute_is_dual_link_lvds(struct intel_lvds_encoder
*lvds_encoder
)
989 struct drm_device
*dev
= lvds_encoder
->base
.base
.dev
;
991 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
993 /* use the module option value if specified */
994 if (i915_lvds_channel_mode
> 0)
995 return i915_lvds_channel_mode
== 2;
997 if (dmi_check_system(intel_dual_link_lvds
))
1000 /* BIOS should set the proper LVDS register value at boot, but
1001 * in reality, it doesn't set the value when the lid is closed;
1002 * we need to check "the value to be set" in VBT when LVDS
1003 * register is uninitialized.
1005 val
= I915_READ(lvds_encoder
->reg
);
1006 if (!(val
& ~(LVDS_PIPE_MASK
| LVDS_DETECTED
)))
1007 val
= dev_priv
->bios_lvds_val
;
1009 return (val
& LVDS_CLKB_POWER_MASK
) == LVDS_CLKB_POWER_UP
;
1012 static bool intel_lvds_supported(struct drm_device
*dev
)
1014 /* With the introduction of the PCH we gained a dedicated
1015 * LVDS presence pin, use it. */
1016 if (HAS_PCH_SPLIT(dev
))
1019 /* Otherwise LVDS was only attached to mobile products,
1020 * except for the inglorious 830gm */
1021 return IS_MOBILE(dev
) && !IS_I830(dev
);
1025 * intel_lvds_init - setup LVDS connectors on this device
1028 * Create the connector, register the LVDS DDC bus, and try to figure out what
1029 * modes we can display on the LVDS panel (if present).
1031 bool intel_lvds_init(struct drm_device
*dev
)
1033 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1034 struct intel_lvds_encoder
*lvds_encoder
;
1035 struct intel_encoder
*intel_encoder
;
1036 struct intel_lvds_connector
*lvds_connector
;
1037 struct intel_connector
*intel_connector
;
1038 struct drm_connector
*connector
;
1039 struct drm_encoder
*encoder
;
1040 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
1041 struct drm_display_mode
*fixed_mode
= NULL
;
1043 struct drm_crtc
*crtc
;
1048 if (!intel_lvds_supported(dev
))
1051 /* Skip init on machines we know falsely report LVDS */
1052 if (dmi_check_system(intel_no_lvds
))
1055 pin
= GMBUS_PORT_PANEL
;
1056 if (!lvds_is_present_in_vbt(dev
, &pin
)) {
1057 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
1061 if (HAS_PCH_SPLIT(dev
)) {
1062 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
1064 if (dev_priv
->edp
.support
) {
1065 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
1070 lvds_encoder
= kzalloc(sizeof(struct intel_lvds_encoder
), GFP_KERNEL
);
1074 lvds_connector
= kzalloc(sizeof(struct intel_lvds_connector
), GFP_KERNEL
);
1075 if (!lvds_connector
) {
1076 kfree(lvds_encoder
);
1080 lvds_encoder
->attached_connector
= lvds_connector
;
1082 if (!HAS_PCH_SPLIT(dev
)) {
1083 lvds_encoder
->pfit_control
= I915_READ(PFIT_CONTROL
);
1086 intel_encoder
= &lvds_encoder
->base
;
1087 encoder
= &intel_encoder
->base
;
1088 intel_connector
= &lvds_connector
->base
;
1089 connector
= &intel_connector
->base
;
1090 drm_connector_init(dev
, &intel_connector
->base
, &intel_lvds_connector_funcs
,
1091 DRM_MODE_CONNECTOR_LVDS
);
1093 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_lvds_enc_funcs
,
1094 DRM_MODE_ENCODER_LVDS
);
1096 intel_encoder
->enable
= intel_enable_lvds
;
1097 intel_encoder
->pre_pll_enable
= intel_pre_pll_enable_lvds
;
1098 intel_encoder
->disable
= intel_disable_lvds
;
1099 intel_encoder
->get_hw_state
= intel_lvds_get_hw_state
;
1100 intel_connector
->get_hw_state
= intel_connector_get_hw_state
;
1102 intel_connector_attach_encoder(intel_connector
, intel_encoder
);
1103 intel_encoder
->type
= INTEL_OUTPUT_LVDS
;
1105 intel_encoder
->cloneable
= false;
1106 if (HAS_PCH_SPLIT(dev
))
1107 intel_encoder
->crtc_mask
= (1 << 0) | (1 << 1) | (1 << 2);
1108 else if (IS_GEN4(dev
))
1109 intel_encoder
->crtc_mask
= (1 << 0) | (1 << 1);
1111 intel_encoder
->crtc_mask
= (1 << 1);
1113 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
1114 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
1115 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
1116 connector
->interlace_allowed
= false;
1117 connector
->doublescan_allowed
= false;
1119 if (HAS_PCH_SPLIT(dev
)) {
1120 lvds_encoder
->reg
= PCH_LVDS
;
1122 lvds_encoder
->reg
= LVDS
;
1125 /* create the scaling mode property */
1126 drm_mode_create_scaling_mode_property(dev
);
1127 drm_object_attach_property(&connector
->base
,
1128 dev
->mode_config
.scaling_mode_property
,
1129 DRM_MODE_SCALE_ASPECT
);
1130 intel_connector
->panel
.fitting_mode
= DRM_MODE_SCALE_ASPECT
;
1133 * 1) check for EDID on DDC
1134 * 2) check for VBT data
1135 * 3) check to see if LVDS is already on
1136 * if none of the above, no panel
1137 * 4) make sure lid is open
1138 * if closed, act like it's not there for now
1142 * Attempt to get the fixed panel mode from DDC. Assume that the
1143 * preferred mode is the right one.
1145 edid
= drm_get_edid(connector
, intel_gmbus_get_adapter(dev_priv
, pin
));
1147 if (drm_add_edid_modes(connector
, edid
)) {
1148 drm_mode_connector_update_edid_property(connector
,
1152 edid
= ERR_PTR(-EINVAL
);
1155 edid
= ERR_PTR(-ENOENT
);
1157 lvds_connector
->base
.edid
= edid
;
1159 if (IS_ERR_OR_NULL(edid
)) {
1160 /* Didn't get an EDID, so
1161 * Set wide sync ranges so we get all modes
1162 * handed to valid_mode for checking
1164 connector
->display_info
.min_vfreq
= 0;
1165 connector
->display_info
.max_vfreq
= 200;
1166 connector
->display_info
.min_hfreq
= 0;
1167 connector
->display_info
.max_hfreq
= 200;
1170 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
1171 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
1172 DRM_DEBUG_KMS("using preferred mode from EDID: ");
1173 drm_mode_debug_printmodeline(scan
);
1175 fixed_mode
= drm_mode_duplicate(dev
, scan
);
1177 intel_find_lvds_downclock(dev
, fixed_mode
,
1184 /* Failed to get EDID, what about VBT? */
1185 if (dev_priv
->lfp_lvds_vbt_mode
) {
1186 DRM_DEBUG_KMS("using mode from VBT: ");
1187 drm_mode_debug_printmodeline(dev_priv
->lfp_lvds_vbt_mode
);
1189 fixed_mode
= drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
1191 fixed_mode
->type
|= DRM_MODE_TYPE_PREFERRED
;
1197 * If we didn't get EDID, try checking if the panel is already turned
1198 * on. If so, assume that whatever is currently programmed is the
1202 /* Ironlake: FIXME if still fail, not try pipe mode now */
1203 if (HAS_PCH_SPLIT(dev
))
1206 lvds
= I915_READ(LVDS
);
1207 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
1208 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
1210 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
1211 fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
1213 DRM_DEBUG_KMS("using current (BIOS) mode: ");
1214 drm_mode_debug_printmodeline(fixed_mode
);
1215 fixed_mode
->type
|= DRM_MODE_TYPE_PREFERRED
;
1220 /* If we still don't have a mode after all that, give up. */
1225 lvds_encoder
->is_dual_link
= compute_is_dual_link_lvds(lvds_encoder
);
1226 DRM_DEBUG_KMS("detected %s-link lvds configuration\n",
1227 lvds_encoder
->is_dual_link
? "dual" : "single");
1230 * Unlock registers and just
1231 * leave them unlocked
1233 if (HAS_PCH_SPLIT(dev
)) {
1234 I915_WRITE(PCH_PP_CONTROL
,
1235 I915_READ(PCH_PP_CONTROL
) | PANEL_UNLOCK_REGS
);
1237 I915_WRITE(PP_CONTROL
,
1238 I915_READ(PP_CONTROL
) | PANEL_UNLOCK_REGS
);
1240 lvds_connector
->lid_notifier
.notifier_call
= intel_lid_notify
;
1241 if (acpi_lid_notifier_register(&lvds_connector
->lid_notifier
)) {
1242 DRM_DEBUG_KMS("lid notifier registration failed\n");
1243 lvds_connector
->lid_notifier
.notifier_call
= NULL
;
1245 drm_sysfs_connector_add(connector
);
1247 intel_panel_init(&intel_connector
->panel
, fixed_mode
);
1248 intel_panel_setup_backlight(connector
);
1253 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1254 drm_connector_cleanup(connector
);
1255 drm_encoder_cleanup(encoder
);
1257 drm_mode_destroy(dev
, fixed_mode
);
1258 kfree(lvds_encoder
);
1259 kfree(lvds_connector
);