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>
37 #include "intel_drv.h"
40 #include <linux/acpi.h>
42 /* Private structure for the integrated LVDS support */
43 struct intel_lvds_priv
{
50 * Sets the backlight level.
52 * \param level backlight level, from 0 to intel_lvds_get_max_backlight().
54 static void intel_lvds_set_backlight(struct drm_device
*dev
, int level
)
56 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
59 if (HAS_PCH_SPLIT(dev
))
60 reg
= BLC_PWM_CPU_CTL
;
64 blc_pwm_ctl
= I915_READ(reg
) & ~BACKLIGHT_DUTY_CYCLE_MASK
;
65 I915_WRITE(reg
, (blc_pwm_ctl
|
66 (level
<< BACKLIGHT_DUTY_CYCLE_SHIFT
)));
70 * Returns the maximum level of the backlight duty cycle field.
72 static u32
intel_lvds_get_max_backlight(struct drm_device
*dev
)
74 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
77 if (HAS_PCH_SPLIT(dev
))
78 reg
= BLC_PWM_PCH_CTL2
;
82 return ((I915_READ(reg
) & BACKLIGHT_MODULATION_FREQ_MASK
) >>
83 BACKLIGHT_MODULATION_FREQ_SHIFT
) * 2;
87 * Sets the power state for the panel.
89 static void intel_lvds_set_power(struct drm_device
*dev
, bool on
)
91 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
92 u32 pp_status
, ctl_reg
, status_reg
, lvds_reg
;
94 if (HAS_PCH_SPLIT(dev
)) {
95 ctl_reg
= PCH_PP_CONTROL
;
96 status_reg
= PCH_PP_STATUS
;
100 status_reg
= PP_STATUS
;
105 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) | LVDS_PORT_EN
);
106 POSTING_READ(lvds_reg
);
108 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) |
111 pp_status
= I915_READ(status_reg
);
112 } while ((pp_status
& PP_ON
) == 0);
114 intel_lvds_set_backlight(dev
, dev_priv
->backlight_duty_cycle
);
116 intel_lvds_set_backlight(dev
, 0);
118 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) &
121 pp_status
= I915_READ(status_reg
);
122 } while (pp_status
& PP_ON
);
124 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) & ~LVDS_PORT_EN
);
125 POSTING_READ(lvds_reg
);
129 static void intel_lvds_dpms(struct drm_encoder
*encoder
, int mode
)
131 struct drm_device
*dev
= encoder
->dev
;
133 if (mode
== DRM_MODE_DPMS_ON
)
134 intel_lvds_set_power(dev
, true);
136 intel_lvds_set_power(dev
, false);
138 /* XXX: We never power down the LVDS pairs. */
141 static int intel_lvds_mode_valid(struct drm_connector
*connector
,
142 struct drm_display_mode
*mode
)
144 struct drm_device
*dev
= connector
->dev
;
145 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
146 struct drm_display_mode
*fixed_mode
= dev_priv
->panel_fixed_mode
;
149 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
151 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
158 static bool intel_lvds_mode_fixup(struct drm_encoder
*encoder
,
159 struct drm_display_mode
*mode
,
160 struct drm_display_mode
*adjusted_mode
)
163 * float point operation is not supported . So the PANEL_RATIO_FACTOR
164 * is defined, which can avoid the float point computation when
165 * calculating the panel ratio.
167 #define PANEL_RATIO_FACTOR 8192
168 struct drm_device
*dev
= encoder
->dev
;
169 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
170 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->crtc
);
171 struct drm_encoder
*tmp_encoder
;
172 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
173 struct intel_lvds_priv
*lvds_priv
= intel_encoder
->dev_priv
;
174 u32 pfit_control
= 0, pfit_pgm_ratios
= 0;
175 int left_border
= 0, right_border
= 0, top_border
= 0;
176 int bottom_border
= 0;
178 int panel_ratio
, desired_ratio
, vert_scale
, horiz_scale
;
179 int horiz_ratio
, vert_ratio
;
180 u32 hsync_width
, vsync_width
;
181 u32 hblank_width
, vblank_width
;
182 u32 hsync_pos
, vsync_pos
;
184 /* Should never happen!! */
185 if (!IS_I965G(dev
) && intel_crtc
->pipe
== 0) {
186 DRM_ERROR("Can't support LVDS on pipe A\n");
190 /* Should never happen!! */
191 list_for_each_entry(tmp_encoder
, &dev
->mode_config
.encoder_list
, head
) {
192 if (tmp_encoder
!= encoder
&& tmp_encoder
->crtc
== encoder
->crtc
) {
193 DRM_ERROR("Can't enable LVDS and another "
194 "encoder on the same pipe\n");
198 /* If we don't have a panel mode, there is nothing we can do */
199 if (dev_priv
->panel_fixed_mode
== NULL
)
202 * If we have timings from the BIOS for the panel, put them in
203 * to the adjusted mode. The CRTC will be set up for this mode,
204 * with the panel scaling set up to source from the H/VDisplay
205 * of the original mode.
207 if (dev_priv
->panel_fixed_mode
!= NULL
) {
208 adjusted_mode
->hdisplay
= dev_priv
->panel_fixed_mode
->hdisplay
;
209 adjusted_mode
->hsync_start
=
210 dev_priv
->panel_fixed_mode
->hsync_start
;
211 adjusted_mode
->hsync_end
=
212 dev_priv
->panel_fixed_mode
->hsync_end
;
213 adjusted_mode
->htotal
= dev_priv
->panel_fixed_mode
->htotal
;
214 adjusted_mode
->vdisplay
= dev_priv
->panel_fixed_mode
->vdisplay
;
215 adjusted_mode
->vsync_start
=
216 dev_priv
->panel_fixed_mode
->vsync_start
;
217 adjusted_mode
->vsync_end
=
218 dev_priv
->panel_fixed_mode
->vsync_end
;
219 adjusted_mode
->vtotal
= dev_priv
->panel_fixed_mode
->vtotal
;
220 adjusted_mode
->clock
= dev_priv
->panel_fixed_mode
->clock
;
221 drm_mode_set_crtcinfo(adjusted_mode
, CRTC_INTERLACE_HALVE_V
);
224 /* Make sure pre-965s set dither correctly */
225 if (!IS_I965G(dev
)) {
226 if (dev_priv
->panel_wants_dither
|| dev_priv
->lvds_dither
)
227 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
230 /* Native modes don't need fitting */
231 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
232 adjusted_mode
->vdisplay
== mode
->vdisplay
) {
238 /* full screen scale for now */
239 if (HAS_PCH_SPLIT(dev
))
242 /* 965+ wants fuzzy fitting */
244 pfit_control
|= (intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
247 hsync_width
= adjusted_mode
->crtc_hsync_end
-
248 adjusted_mode
->crtc_hsync_start
;
249 vsync_width
= adjusted_mode
->crtc_vsync_end
-
250 adjusted_mode
->crtc_vsync_start
;
251 hblank_width
= adjusted_mode
->crtc_hblank_end
-
252 adjusted_mode
->crtc_hblank_start
;
253 vblank_width
= adjusted_mode
->crtc_vblank_end
-
254 adjusted_mode
->crtc_vblank_start
;
256 * Deal with panel fitting options. Figure out how to stretch the
257 * image based on its aspect ratio & the current panel fitting mode.
259 panel_ratio
= adjusted_mode
->hdisplay
* PANEL_RATIO_FACTOR
/
260 adjusted_mode
->vdisplay
;
261 desired_ratio
= mode
->hdisplay
* PANEL_RATIO_FACTOR
/
264 * Enable automatic panel scaling for non-native modes so that they fill
265 * the screen. Should be enabled before the pipe is enabled, according
266 * to register description and PRM.
267 * Change the value here to see the borders for debugging
269 if (!HAS_PCH_SPLIT(dev
)) {
270 I915_WRITE(BCLRPAT_A
, 0);
271 I915_WRITE(BCLRPAT_B
, 0);
274 switch (lvds_priv
->fitting_mode
) {
275 case DRM_MODE_SCALE_CENTER
:
277 * For centered modes, we have to calculate border widths &
278 * heights and modify the values programmed into the CRTC.
280 left_border
= (adjusted_mode
->hdisplay
- mode
->hdisplay
) / 2;
281 right_border
= left_border
;
282 if (mode
->hdisplay
& 1)
284 top_border
= (adjusted_mode
->vdisplay
- mode
->vdisplay
) / 2;
285 bottom_border
= top_border
;
286 if (mode
->vdisplay
& 1)
288 /* Set active & border values */
289 adjusted_mode
->crtc_hdisplay
= mode
->hdisplay
;
290 /* Keep the boder be even */
291 if (right_border
& 1)
293 /* use the border directly instead of border minuse one */
294 adjusted_mode
->crtc_hblank_start
= mode
->hdisplay
+
296 /* keep the blank width constant */
297 adjusted_mode
->crtc_hblank_end
=
298 adjusted_mode
->crtc_hblank_start
+ hblank_width
;
299 /* get the hsync pos relative to hblank start */
300 hsync_pos
= (hblank_width
- hsync_width
) / 2;
301 /* keep the hsync pos be even */
304 adjusted_mode
->crtc_hsync_start
=
305 adjusted_mode
->crtc_hblank_start
+ hsync_pos
;
306 /* keep the hsync width constant */
307 adjusted_mode
->crtc_hsync_end
=
308 adjusted_mode
->crtc_hsync_start
+ hsync_width
;
309 adjusted_mode
->crtc_vdisplay
= mode
->vdisplay
;
310 /* use the border instead of border minus one */
311 adjusted_mode
->crtc_vblank_start
= mode
->vdisplay
+
313 /* keep the vblank width constant */
314 adjusted_mode
->crtc_vblank_end
=
315 adjusted_mode
->crtc_vblank_start
+ vblank_width
;
316 /* get the vsync start postion relative to vblank start */
317 vsync_pos
= (vblank_width
- vsync_width
) / 2;
318 adjusted_mode
->crtc_vsync_start
=
319 adjusted_mode
->crtc_vblank_start
+ vsync_pos
;
320 /* keep the vsync width constant */
321 adjusted_mode
->crtc_vsync_end
=
322 adjusted_mode
->crtc_vsync_start
+ vsync_width
;
325 case DRM_MODE_SCALE_ASPECT
:
326 /* Scale but preserve the spect ratio */
327 pfit_control
|= PFIT_ENABLE
;
329 /* 965+ is easy, it does everything in hw */
330 if (panel_ratio
> desired_ratio
)
331 pfit_control
|= PFIT_SCALING_PILLAR
;
332 else if (panel_ratio
< desired_ratio
)
333 pfit_control
|= PFIT_SCALING_LETTER
;
335 pfit_control
|= PFIT_SCALING_AUTO
;
338 * For earlier chips we have to calculate the scaling
339 * ratio by hand and program it into the
340 * PFIT_PGM_RATIO register
342 u32 horiz_bits
, vert_bits
, bits
= 12;
343 horiz_ratio
= mode
->hdisplay
* PANEL_RATIO_FACTOR
/
344 adjusted_mode
->hdisplay
;
345 vert_ratio
= mode
->vdisplay
* PANEL_RATIO_FACTOR
/
346 adjusted_mode
->vdisplay
;
347 horiz_scale
= adjusted_mode
->hdisplay
*
348 PANEL_RATIO_FACTOR
/ mode
->hdisplay
;
349 vert_scale
= adjusted_mode
->vdisplay
*
350 PANEL_RATIO_FACTOR
/ mode
->vdisplay
;
352 /* retain aspect ratio */
353 if (panel_ratio
> desired_ratio
) { /* Pillar */
355 scaled_width
= mode
->hdisplay
* vert_scale
/
357 horiz_ratio
= vert_ratio
;
358 pfit_control
|= (VERT_AUTO_SCALE
|
359 VERT_INTERP_BILINEAR
|
360 HORIZ_INTERP_BILINEAR
);
361 /* Pillar will have left/right borders */
362 left_border
= (adjusted_mode
->hdisplay
-
364 right_border
= left_border
;
365 if (mode
->hdisplay
& 1) /* odd resolutions */
367 /* keep the border be even */
368 if (right_border
& 1)
370 adjusted_mode
->crtc_hdisplay
= scaled_width
;
371 /* use border instead of border minus one */
372 adjusted_mode
->crtc_hblank_start
=
373 scaled_width
+ right_border
;
374 /* keep the hblank width constant */
375 adjusted_mode
->crtc_hblank_end
=
376 adjusted_mode
->crtc_hblank_start
+
379 * get the hsync start pos relative to
382 hsync_pos
= (hblank_width
- hsync_width
) / 2;
383 /* keep the hsync_pos be even */
386 adjusted_mode
->crtc_hsync_start
=
387 adjusted_mode
->crtc_hblank_start
+
389 /* keept hsync width constant */
390 adjusted_mode
->crtc_hsync_end
=
391 adjusted_mode
->crtc_hsync_start
+
394 } else if (panel_ratio
< desired_ratio
) { /* letter */
395 u32 scaled_height
= mode
->vdisplay
*
396 horiz_scale
/ PANEL_RATIO_FACTOR
;
397 vert_ratio
= horiz_ratio
;
398 pfit_control
|= (HORIZ_AUTO_SCALE
|
399 VERT_INTERP_BILINEAR
|
400 HORIZ_INTERP_BILINEAR
);
401 /* Letterbox will have top/bottom border */
402 top_border
= (adjusted_mode
->vdisplay
-
404 bottom_border
= top_border
;
405 if (mode
->vdisplay
& 1)
407 adjusted_mode
->crtc_vdisplay
= scaled_height
;
408 /* use border instead of border minus one */
409 adjusted_mode
->crtc_vblank_start
=
410 scaled_height
+ bottom_border
;
411 /* keep the vblank width constant */
412 adjusted_mode
->crtc_vblank_end
=
413 adjusted_mode
->crtc_vblank_start
+
416 * get the vsync start pos relative to
419 vsync_pos
= (vblank_width
- vsync_width
) / 2;
420 adjusted_mode
->crtc_vsync_start
=
421 adjusted_mode
->crtc_vblank_start
+
423 /* keep the vsync width constant */
424 adjusted_mode
->crtc_vsync_end
=
425 adjusted_mode
->crtc_vsync_start
+
429 /* Aspects match, Let hw scale both directions */
430 pfit_control
|= (VERT_AUTO_SCALE
|
432 VERT_INTERP_BILINEAR
|
433 HORIZ_INTERP_BILINEAR
);
435 horiz_bits
= (1 << bits
) * horiz_ratio
/
437 vert_bits
= (1 << bits
) * vert_ratio
/
440 ((vert_bits
<< PFIT_VERT_SCALE_SHIFT
) &
441 PFIT_VERT_SCALE_MASK
) |
442 ((horiz_bits
<< PFIT_HORIZ_SCALE_SHIFT
) &
443 PFIT_HORIZ_SCALE_MASK
);
447 case DRM_MODE_SCALE_FULLSCREEN
:
449 * Full scaling, even if it changes the aspect ratio.
450 * Fortunately this is all done for us in hw.
452 pfit_control
|= PFIT_ENABLE
;
454 pfit_control
|= PFIT_SCALING_AUTO
;
456 pfit_control
|= (VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
457 VERT_INTERP_BILINEAR
|
458 HORIZ_INTERP_BILINEAR
);
465 lvds_priv
->pfit_control
= pfit_control
;
466 lvds_priv
->pfit_pgm_ratios
= pfit_pgm_ratios
;
468 * When there exists the border, it means that the LVDS_BORDR
472 dev_priv
->lvds_border_bits
|= LVDS_BORDER_ENABLE
;
474 dev_priv
->lvds_border_bits
&= ~(LVDS_BORDER_ENABLE
);
476 * XXX: It would be nice to support lower refresh rates on the
477 * panels to reduce power consumption, and perhaps match the
478 * user's requested refresh rate.
484 static void intel_lvds_prepare(struct drm_encoder
*encoder
)
486 struct drm_device
*dev
= encoder
->dev
;
487 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
490 if (HAS_PCH_SPLIT(dev
))
491 reg
= BLC_PWM_CPU_CTL
;
495 dev_priv
->saveBLC_PWM_CTL
= I915_READ(reg
);
496 dev_priv
->backlight_duty_cycle
= (dev_priv
->saveBLC_PWM_CTL
&
497 BACKLIGHT_DUTY_CYCLE_MASK
);
499 intel_lvds_set_power(dev
, false);
502 static void intel_lvds_commit( struct drm_encoder
*encoder
)
504 struct drm_device
*dev
= encoder
->dev
;
505 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
507 if (dev_priv
->backlight_duty_cycle
== 0)
508 dev_priv
->backlight_duty_cycle
=
509 intel_lvds_get_max_backlight(dev
);
511 intel_lvds_set_power(dev
, true);
514 static void intel_lvds_mode_set(struct drm_encoder
*encoder
,
515 struct drm_display_mode
*mode
,
516 struct drm_display_mode
*adjusted_mode
)
518 struct drm_device
*dev
= encoder
->dev
;
519 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
520 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
521 struct intel_lvds_priv
*lvds_priv
= intel_encoder
->dev_priv
;
524 * The LVDS pin pair will already have been turned on in the
525 * intel_crtc_mode_set since it has a large impact on the DPLL
529 if (HAS_PCH_SPLIT(dev
))
533 * Enable automatic panel scaling so that non-native modes fill the
534 * screen. Should be enabled before the pipe is enabled, according to
535 * register description and PRM.
537 I915_WRITE(PFIT_PGM_RATIOS
, lvds_priv
->pfit_pgm_ratios
);
538 I915_WRITE(PFIT_CONTROL
, lvds_priv
->pfit_control
);
542 * Detect the LVDS connection.
544 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
545 * connected and closed means disconnected. We also send hotplug events as
546 * needed, using lid status notification from the input layer.
548 static enum drm_connector_status
intel_lvds_detect(struct drm_connector
*connector
)
550 struct drm_device
*dev
= connector
->dev
;
551 enum drm_connector_status status
= connector_status_connected
;
553 /* ACPI lid methods were generally unreliable in this generation, so
556 if (IS_GEN2(dev
) || IS_GEN3(dev
))
557 return connector_status_connected
;
563 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
565 static int intel_lvds_get_modes(struct drm_connector
*connector
)
567 struct drm_device
*dev
= connector
->dev
;
568 struct intel_encoder
*intel_encoder
= to_intel_encoder(connector
);
569 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
572 if (dev_priv
->lvds_edid_good
) {
573 ret
= intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
);
579 /* Didn't get an EDID, so
580 * Set wide sync ranges so we get all modes
581 * handed to valid_mode for checking
583 connector
->display_info
.min_vfreq
= 0;
584 connector
->display_info
.max_vfreq
= 200;
585 connector
->display_info
.min_hfreq
= 0;
586 connector
->display_info
.max_hfreq
= 200;
588 if (dev_priv
->panel_fixed_mode
!= NULL
) {
589 struct drm_display_mode
*mode
;
591 mode
= drm_mode_duplicate(dev
, dev_priv
->panel_fixed_mode
);
592 drm_mode_probed_add(connector
, mode
);
601 * Lid events. Note the use of 'modeset_on_lid':
602 * - we set it on lid close, and reset it on open
603 * - we use it as a "only once" bit (ie we ignore
604 * duplicate events where it was already properly
606 * - the suspend/resume paths will also set it to
607 * zero, since they restore the mode ("lid open").
609 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
612 struct drm_i915_private
*dev_priv
=
613 container_of(nb
, struct drm_i915_private
, lid_notifier
);
614 struct drm_device
*dev
= dev_priv
->dev
;
615 struct drm_connector
*connector
= dev_priv
->int_lvds_connector
;
618 * check and update the status of LVDS connector after receiving
619 * the LID nofication event.
622 connector
->status
= connector
->funcs
->detect(connector
);
623 if (!acpi_lid_open()) {
624 dev_priv
->modeset_on_lid
= 1;
628 if (!dev_priv
->modeset_on_lid
)
631 dev_priv
->modeset_on_lid
= 0;
633 mutex_lock(&dev
->mode_config
.mutex
);
634 drm_helper_resume_force_mode(dev
);
635 mutex_unlock(&dev
->mode_config
.mutex
);
641 * intel_lvds_destroy - unregister and free LVDS structures
642 * @connector: connector to free
644 * Unregister the DDC bus for this connector then free the driver private
647 static void intel_lvds_destroy(struct drm_connector
*connector
)
649 struct drm_device
*dev
= connector
->dev
;
650 struct intel_encoder
*intel_encoder
= to_intel_encoder(connector
);
651 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
653 if (intel_encoder
->ddc_bus
)
654 intel_i2c_destroy(intel_encoder
->ddc_bus
);
655 if (dev_priv
->lid_notifier
.notifier_call
)
656 acpi_lid_notifier_unregister(&dev_priv
->lid_notifier
);
657 drm_sysfs_connector_remove(connector
);
658 drm_connector_cleanup(connector
);
662 static int intel_lvds_set_property(struct drm_connector
*connector
,
663 struct drm_property
*property
,
666 struct drm_device
*dev
= connector
->dev
;
667 struct intel_encoder
*intel_encoder
=
668 to_intel_encoder(connector
);
670 if (property
== dev
->mode_config
.scaling_mode_property
&&
671 connector
->encoder
) {
672 struct drm_crtc
*crtc
= connector
->encoder
->crtc
;
673 struct intel_lvds_priv
*lvds_priv
= intel_encoder
->dev_priv
;
674 if (value
== DRM_MODE_SCALE_NONE
) {
675 DRM_DEBUG_KMS("no scaling not supported\n");
678 if (lvds_priv
->fitting_mode
== value
) {
679 /* the LVDS scaling property is not changed */
682 lvds_priv
->fitting_mode
= value
;
683 if (crtc
&& crtc
->enabled
) {
685 * If the CRTC is enabled, the display will be changed
686 * according to the new panel fitting mode.
688 drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
689 crtc
->x
, crtc
->y
, crtc
->fb
);
696 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
697 .dpms
= intel_lvds_dpms
,
698 .mode_fixup
= intel_lvds_mode_fixup
,
699 .prepare
= intel_lvds_prepare
,
700 .mode_set
= intel_lvds_mode_set
,
701 .commit
= intel_lvds_commit
,
704 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
705 .get_modes
= intel_lvds_get_modes
,
706 .mode_valid
= intel_lvds_mode_valid
,
707 .best_encoder
= intel_best_encoder
,
710 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
711 .dpms
= drm_helper_connector_dpms
,
712 .detect
= intel_lvds_detect
,
713 .fill_modes
= drm_helper_probe_single_connector_modes
,
714 .set_property
= intel_lvds_set_property
,
715 .destroy
= intel_lvds_destroy
,
719 static void intel_lvds_enc_destroy(struct drm_encoder
*encoder
)
721 drm_encoder_cleanup(encoder
);
724 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
725 .destroy
= intel_lvds_enc_destroy
,
728 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
730 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id
->ident
);
734 /* These systems claim to have LVDS, but really don't */
735 static const struct dmi_system_id intel_no_lvds
[] = {
737 .callback
= intel_no_lvds_dmi_callback
,
738 .ident
= "Apple Mac Mini (Core series)",
740 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
741 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
745 .callback
= intel_no_lvds_dmi_callback
,
746 .ident
= "Apple Mac Mini (Core 2 series)",
748 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
749 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
753 .callback
= intel_no_lvds_dmi_callback
,
754 .ident
= "MSI IM-945GSE-A",
756 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
757 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
761 .callback
= intel_no_lvds_dmi_callback
,
762 .ident
= "Dell Studio Hybrid",
764 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
765 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
769 .callback
= intel_no_lvds_dmi_callback
,
770 .ident
= "AOpen Mini PC",
772 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
773 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
777 .callback
= intel_no_lvds_dmi_callback
,
778 .ident
= "AOpen Mini PC MP915",
780 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
781 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
785 .callback
= intel_no_lvds_dmi_callback
,
786 .ident
= "Aopen i945GTt-VFA",
788 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
792 .callback
= intel_no_lvds_dmi_callback
,
793 .ident
= "Clientron U800",
795 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
796 DMI_MATCH(DMI_PRODUCT_NAME
, "U800"),
800 { } /* terminating entry */
804 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
806 * @connector: LVDS connector
808 * Find the reduced downclock for LVDS in EDID.
810 static void intel_find_lvds_downclock(struct drm_device
*dev
,
811 struct drm_connector
*connector
)
813 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
814 struct drm_display_mode
*scan
, *panel_fixed_mode
;
817 panel_fixed_mode
= dev_priv
->panel_fixed_mode
;
818 temp_downclock
= panel_fixed_mode
->clock
;
820 mutex_lock(&dev
->mode_config
.mutex
);
821 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
823 * If one mode has the same resolution with the fixed_panel
824 * mode while they have the different refresh rate, it means
825 * that the reduced downclock is found for the LVDS. In such
826 * case we can set the different FPx0/1 to dynamically select
827 * between low and high frequency.
829 if (scan
->hdisplay
== panel_fixed_mode
->hdisplay
&&
830 scan
->hsync_start
== panel_fixed_mode
->hsync_start
&&
831 scan
->hsync_end
== panel_fixed_mode
->hsync_end
&&
832 scan
->htotal
== panel_fixed_mode
->htotal
&&
833 scan
->vdisplay
== panel_fixed_mode
->vdisplay
&&
834 scan
->vsync_start
== panel_fixed_mode
->vsync_start
&&
835 scan
->vsync_end
== panel_fixed_mode
->vsync_end
&&
836 scan
->vtotal
== panel_fixed_mode
->vtotal
) {
837 if (scan
->clock
< temp_downclock
) {
839 * The downclock is already found. But we
840 * expect to find the lower downclock.
842 temp_downclock
= scan
->clock
;
846 mutex_unlock(&dev
->mode_config
.mutex
);
847 if (temp_downclock
< panel_fixed_mode
->clock
&&
848 i915_lvds_downclock
) {
849 /* We found the downclock for LVDS. */
850 dev_priv
->lvds_downclock_avail
= 1;
851 dev_priv
->lvds_downclock
= temp_downclock
;
852 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
853 "Normal clock %dKhz, downclock %dKhz\n",
854 panel_fixed_mode
->clock
, temp_downclock
);
860 * Enumerate the child dev array parsed from VBT to check whether
861 * the LVDS is present.
862 * If it is present, return 1.
863 * If it is not present, return false.
864 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
865 * Note: The addin_offset should also be checked for LVDS panel.
866 * Only when it is non-zero, it is assumed that it is present.
868 static int lvds_is_present_in_vbt(struct drm_device
*dev
)
870 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
871 struct child_device_config
*p_child
;
874 if (!dev_priv
->child_dev_num
)
878 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
879 p_child
= dev_priv
->child_dev
+ i
;
881 * If the device type is not LFP, continue.
882 * If the device type is 0x22, it is also regarded as LFP.
884 if (p_child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
885 p_child
->device_type
!= DEVICE_TYPE_LFP
)
888 /* The addin_offset should be checked. Only when it is
889 * non-zero, it is regarded as present.
891 if (p_child
->addin_offset
) {
900 * intel_lvds_init - setup LVDS connectors on this device
903 * Create the connector, register the LVDS DDC bus, and try to figure out what
904 * modes we can display on the LVDS panel (if present).
906 void intel_lvds_init(struct drm_device
*dev
)
908 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
909 struct intel_encoder
*intel_encoder
;
910 struct drm_connector
*connector
;
911 struct drm_encoder
*encoder
;
912 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
913 struct drm_crtc
*crtc
;
914 struct intel_lvds_priv
*lvds_priv
;
916 int pipe
, gpio
= GPIOC
;
918 /* Skip init on machines we know falsely report LVDS */
919 if (dmi_check_system(intel_no_lvds
))
922 if (!lvds_is_present_in_vbt(dev
)) {
923 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
927 if (HAS_PCH_SPLIT(dev
)) {
928 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
930 if (dev_priv
->edp_support
) {
931 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
937 intel_encoder
= kzalloc(sizeof(struct intel_encoder
) +
938 sizeof(struct intel_lvds_priv
), GFP_KERNEL
);
939 if (!intel_encoder
) {
943 connector
= &intel_encoder
->base
;
944 encoder
= &intel_encoder
->enc
;
945 drm_connector_init(dev
, &intel_encoder
->base
, &intel_lvds_connector_funcs
,
946 DRM_MODE_CONNECTOR_LVDS
);
948 drm_encoder_init(dev
, &intel_encoder
->enc
, &intel_lvds_enc_funcs
,
949 DRM_MODE_ENCODER_LVDS
);
951 drm_mode_connector_attach_encoder(&intel_encoder
->base
, &intel_encoder
->enc
);
952 intel_encoder
->type
= INTEL_OUTPUT_LVDS
;
954 intel_encoder
->clone_mask
= (1 << INTEL_LVDS_CLONE_BIT
);
955 intel_encoder
->crtc_mask
= (1 << 1);
957 intel_encoder
->crtc_mask
|= (1 << 0);
958 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
959 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
960 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
961 connector
->interlace_allowed
= false;
962 connector
->doublescan_allowed
= false;
964 lvds_priv
= (struct intel_lvds_priv
*)(intel_encoder
+ 1);
965 intel_encoder
->dev_priv
= lvds_priv
;
966 /* create the scaling mode property */
967 drm_mode_create_scaling_mode_property(dev
);
969 * the initial panel fitting mode will be FULL_SCREEN.
972 drm_connector_attach_property(&intel_encoder
->base
,
973 dev
->mode_config
.scaling_mode_property
,
974 DRM_MODE_SCALE_FULLSCREEN
);
975 lvds_priv
->fitting_mode
= DRM_MODE_SCALE_FULLSCREEN
;
978 * 1) check for EDID on DDC
979 * 2) check for VBT data
980 * 3) check to see if LVDS is already on
981 * if none of the above, no panel
982 * 4) make sure lid is open
983 * if closed, act like it's not there for now
986 /* Set up the DDC bus. */
987 intel_encoder
->ddc_bus
= intel_i2c_create(dev
, gpio
, "LVDSDDC_C");
988 if (!intel_encoder
->ddc_bus
) {
989 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
995 * Attempt to get the fixed panel mode from DDC. Assume that the
996 * preferred mode is the right one.
998 dev_priv
->lvds_edid_good
= true;
1000 if (!intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
))
1001 dev_priv
->lvds_edid_good
= false;
1003 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
1004 mutex_lock(&dev
->mode_config
.mutex
);
1005 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
1006 dev_priv
->panel_fixed_mode
=
1007 drm_mode_duplicate(dev
, scan
);
1008 mutex_unlock(&dev
->mode_config
.mutex
);
1009 intel_find_lvds_downclock(dev
, connector
);
1012 mutex_unlock(&dev
->mode_config
.mutex
);
1015 /* Failed to get EDID, what about VBT? */
1016 if (dev_priv
->lfp_lvds_vbt_mode
) {
1017 mutex_lock(&dev
->mode_config
.mutex
);
1018 dev_priv
->panel_fixed_mode
=
1019 drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
1020 mutex_unlock(&dev
->mode_config
.mutex
);
1021 if (dev_priv
->panel_fixed_mode
) {
1022 dev_priv
->panel_fixed_mode
->type
|=
1023 DRM_MODE_TYPE_PREFERRED
;
1029 * If we didn't get EDID, try checking if the panel is already turned
1030 * on. If so, assume that whatever is currently programmed is the
1034 /* Ironlake: FIXME if still fail, not try pipe mode now */
1035 if (HAS_PCH_SPLIT(dev
))
1038 lvds
= I915_READ(LVDS
);
1039 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
1040 crtc
= intel_get_crtc_from_pipe(dev
, pipe
);
1042 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
1043 dev_priv
->panel_fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
1044 if (dev_priv
->panel_fixed_mode
) {
1045 dev_priv
->panel_fixed_mode
->type
|=
1046 DRM_MODE_TYPE_PREFERRED
;
1051 /* If we still don't have a mode after all that, give up. */
1052 if (!dev_priv
->panel_fixed_mode
)
1056 if (HAS_PCH_SPLIT(dev
)) {
1058 /* make sure PWM is enabled */
1059 pwm
= I915_READ(BLC_PWM_CPU_CTL2
);
1060 pwm
|= (PWM_ENABLE
| PWM_PIPE_B
);
1061 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
);
1063 pwm
= I915_READ(BLC_PWM_PCH_CTL1
);
1064 pwm
|= PWM_PCH_ENABLE
;
1065 I915_WRITE(BLC_PWM_PCH_CTL1
, pwm
);
1067 dev_priv
->lid_notifier
.notifier_call
= intel_lid_notify
;
1068 if (acpi_lid_notifier_register(&dev_priv
->lid_notifier
)) {
1069 DRM_DEBUG_KMS("lid notifier registration failed\n");
1070 dev_priv
->lid_notifier
.notifier_call
= NULL
;
1072 /* keep the LVDS connector */
1073 dev_priv
->int_lvds_connector
= connector
;
1074 drm_sysfs_connector_add(connector
);
1078 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1079 if (intel_encoder
->ddc_bus
)
1080 intel_i2c_destroy(intel_encoder
->ddc_bus
);
1081 drm_connector_cleanup(connector
);
1082 drm_encoder_cleanup(encoder
);
1083 kfree(intel_encoder
);