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 void intel_lvds_save(struct drm_connector
*connector
)
143 struct drm_device
*dev
= connector
->dev
;
144 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
145 u32 pp_on_reg
, pp_off_reg
, pp_ctl_reg
, pp_div_reg
;
148 if (HAS_PCH_SPLIT(dev
)) {
149 pp_on_reg
= PCH_PP_ON_DELAYS
;
150 pp_off_reg
= PCH_PP_OFF_DELAYS
;
151 pp_ctl_reg
= PCH_PP_CONTROL
;
152 pp_div_reg
= PCH_PP_DIVISOR
;
153 pwm_ctl_reg
= BLC_PWM_CPU_CTL
;
155 pp_on_reg
= PP_ON_DELAYS
;
156 pp_off_reg
= PP_OFF_DELAYS
;
157 pp_ctl_reg
= PP_CONTROL
;
158 pp_div_reg
= PP_DIVISOR
;
159 pwm_ctl_reg
= BLC_PWM_CTL
;
162 dev_priv
->savePP_ON
= I915_READ(pp_on_reg
);
163 dev_priv
->savePP_OFF
= I915_READ(pp_off_reg
);
164 dev_priv
->savePP_CONTROL
= I915_READ(pp_ctl_reg
);
165 dev_priv
->savePP_DIVISOR
= I915_READ(pp_div_reg
);
166 dev_priv
->saveBLC_PWM_CTL
= I915_READ(pwm_ctl_reg
);
167 dev_priv
->backlight_duty_cycle
= (dev_priv
->saveBLC_PWM_CTL
&
168 BACKLIGHT_DUTY_CYCLE_MASK
);
171 * If the light is off at server startup, just make it full brightness
173 if (dev_priv
->backlight_duty_cycle
== 0)
174 dev_priv
->backlight_duty_cycle
=
175 intel_lvds_get_max_backlight(dev
);
178 static void intel_lvds_restore(struct drm_connector
*connector
)
180 struct drm_device
*dev
= connector
->dev
;
181 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
182 u32 pp_on_reg
, pp_off_reg
, pp_ctl_reg
, pp_div_reg
;
185 if (HAS_PCH_SPLIT(dev
)) {
186 pp_on_reg
= PCH_PP_ON_DELAYS
;
187 pp_off_reg
= PCH_PP_OFF_DELAYS
;
188 pp_ctl_reg
= PCH_PP_CONTROL
;
189 pp_div_reg
= PCH_PP_DIVISOR
;
190 pwm_ctl_reg
= BLC_PWM_CPU_CTL
;
192 pp_on_reg
= PP_ON_DELAYS
;
193 pp_off_reg
= PP_OFF_DELAYS
;
194 pp_ctl_reg
= PP_CONTROL
;
195 pp_div_reg
= PP_DIVISOR
;
196 pwm_ctl_reg
= BLC_PWM_CTL
;
199 I915_WRITE(pwm_ctl_reg
, dev_priv
->saveBLC_PWM_CTL
);
200 I915_WRITE(pp_on_reg
, dev_priv
->savePP_ON
);
201 I915_WRITE(pp_off_reg
, dev_priv
->savePP_OFF
);
202 I915_WRITE(pp_div_reg
, dev_priv
->savePP_DIVISOR
);
203 I915_WRITE(pp_ctl_reg
, dev_priv
->savePP_CONTROL
);
204 if (dev_priv
->savePP_CONTROL
& POWER_TARGET_ON
)
205 intel_lvds_set_power(dev
, true);
207 intel_lvds_set_power(dev
, false);
210 static int intel_lvds_mode_valid(struct drm_connector
*connector
,
211 struct drm_display_mode
*mode
)
213 struct drm_device
*dev
= connector
->dev
;
214 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
215 struct drm_display_mode
*fixed_mode
= dev_priv
->panel_fixed_mode
;
218 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
220 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
227 static bool intel_lvds_mode_fixup(struct drm_encoder
*encoder
,
228 struct drm_display_mode
*mode
,
229 struct drm_display_mode
*adjusted_mode
)
232 * float point operation is not supported . So the PANEL_RATIO_FACTOR
233 * is defined, which can avoid the float point computation when
234 * calculating the panel ratio.
236 #define PANEL_RATIO_FACTOR 8192
237 struct drm_device
*dev
= encoder
->dev
;
238 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
239 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->crtc
);
240 struct drm_encoder
*tmp_encoder
;
241 struct intel_output
*intel_output
= enc_to_intel_output(encoder
);
242 struct intel_lvds_priv
*lvds_priv
= intel_output
->dev_priv
;
243 u32 pfit_control
= 0, pfit_pgm_ratios
= 0;
244 int left_border
= 0, right_border
= 0, top_border
= 0;
245 int bottom_border
= 0;
247 int panel_ratio
, desired_ratio
, vert_scale
, horiz_scale
;
248 int horiz_ratio
, vert_ratio
;
249 u32 hsync_width
, vsync_width
;
250 u32 hblank_width
, vblank_width
;
251 u32 hsync_pos
, vsync_pos
;
253 /* Should never happen!! */
254 if (!IS_I965G(dev
) && intel_crtc
->pipe
== 0) {
255 DRM_ERROR("Can't support LVDS on pipe A\n");
259 /* Should never happen!! */
260 list_for_each_entry(tmp_encoder
, &dev
->mode_config
.encoder_list
, head
) {
261 if (tmp_encoder
!= encoder
&& tmp_encoder
->crtc
== encoder
->crtc
) {
262 DRM_ERROR("Can't enable LVDS and another "
263 "encoder on the same pipe\n");
267 /* If we don't have a panel mode, there is nothing we can do */
268 if (dev_priv
->panel_fixed_mode
== NULL
)
271 * If we have timings from the BIOS for the panel, put them in
272 * to the adjusted mode. The CRTC will be set up for this mode,
273 * with the panel scaling set up to source from the H/VDisplay
274 * of the original mode.
276 if (dev_priv
->panel_fixed_mode
!= NULL
) {
277 adjusted_mode
->hdisplay
= dev_priv
->panel_fixed_mode
->hdisplay
;
278 adjusted_mode
->hsync_start
=
279 dev_priv
->panel_fixed_mode
->hsync_start
;
280 adjusted_mode
->hsync_end
=
281 dev_priv
->panel_fixed_mode
->hsync_end
;
282 adjusted_mode
->htotal
= dev_priv
->panel_fixed_mode
->htotal
;
283 adjusted_mode
->vdisplay
= dev_priv
->panel_fixed_mode
->vdisplay
;
284 adjusted_mode
->vsync_start
=
285 dev_priv
->panel_fixed_mode
->vsync_start
;
286 adjusted_mode
->vsync_end
=
287 dev_priv
->panel_fixed_mode
->vsync_end
;
288 adjusted_mode
->vtotal
= dev_priv
->panel_fixed_mode
->vtotal
;
289 adjusted_mode
->clock
= dev_priv
->panel_fixed_mode
->clock
;
290 drm_mode_set_crtcinfo(adjusted_mode
, CRTC_INTERLACE_HALVE_V
);
293 /* Make sure pre-965s set dither correctly */
294 if (!IS_I965G(dev
)) {
295 if (dev_priv
->panel_wants_dither
|| dev_priv
->lvds_dither
)
296 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
299 /* Native modes don't need fitting */
300 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
301 adjusted_mode
->vdisplay
== mode
->vdisplay
) {
307 /* full screen scale for now */
308 if (HAS_PCH_SPLIT(dev
))
311 /* 965+ wants fuzzy fitting */
313 pfit_control
|= (intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
316 hsync_width
= adjusted_mode
->crtc_hsync_end
-
317 adjusted_mode
->crtc_hsync_start
;
318 vsync_width
= adjusted_mode
->crtc_vsync_end
-
319 adjusted_mode
->crtc_vsync_start
;
320 hblank_width
= adjusted_mode
->crtc_hblank_end
-
321 adjusted_mode
->crtc_hblank_start
;
322 vblank_width
= adjusted_mode
->crtc_vblank_end
-
323 adjusted_mode
->crtc_vblank_start
;
325 * Deal with panel fitting options. Figure out how to stretch the
326 * image based on its aspect ratio & the current panel fitting mode.
328 panel_ratio
= adjusted_mode
->hdisplay
* PANEL_RATIO_FACTOR
/
329 adjusted_mode
->vdisplay
;
330 desired_ratio
= mode
->hdisplay
* PANEL_RATIO_FACTOR
/
333 * Enable automatic panel scaling for non-native modes so that they fill
334 * the screen. Should be enabled before the pipe is enabled, according
335 * to register description and PRM.
336 * Change the value here to see the borders for debugging
338 if (!HAS_PCH_SPLIT(dev
)) {
339 I915_WRITE(BCLRPAT_A
, 0);
340 I915_WRITE(BCLRPAT_B
, 0);
343 switch (lvds_priv
->fitting_mode
) {
344 case DRM_MODE_SCALE_CENTER
:
346 * For centered modes, we have to calculate border widths &
347 * heights and modify the values programmed into the CRTC.
349 left_border
= (adjusted_mode
->hdisplay
- mode
->hdisplay
) / 2;
350 right_border
= left_border
;
351 if (mode
->hdisplay
& 1)
353 top_border
= (adjusted_mode
->vdisplay
- mode
->vdisplay
) / 2;
354 bottom_border
= top_border
;
355 if (mode
->vdisplay
& 1)
357 /* Set active & border values */
358 adjusted_mode
->crtc_hdisplay
= mode
->hdisplay
;
359 /* Keep the boder be even */
360 if (right_border
& 1)
362 /* use the border directly instead of border minuse one */
363 adjusted_mode
->crtc_hblank_start
= mode
->hdisplay
+
365 /* keep the blank width constant */
366 adjusted_mode
->crtc_hblank_end
=
367 adjusted_mode
->crtc_hblank_start
+ hblank_width
;
368 /* get the hsync pos relative to hblank start */
369 hsync_pos
= (hblank_width
- hsync_width
) / 2;
370 /* keep the hsync pos be even */
373 adjusted_mode
->crtc_hsync_start
=
374 adjusted_mode
->crtc_hblank_start
+ hsync_pos
;
375 /* keep the hsync width constant */
376 adjusted_mode
->crtc_hsync_end
=
377 adjusted_mode
->crtc_hsync_start
+ hsync_width
;
378 adjusted_mode
->crtc_vdisplay
= mode
->vdisplay
;
379 /* use the border instead of border minus one */
380 adjusted_mode
->crtc_vblank_start
= mode
->vdisplay
+
382 /* keep the vblank width constant */
383 adjusted_mode
->crtc_vblank_end
=
384 adjusted_mode
->crtc_vblank_start
+ vblank_width
;
385 /* get the vsync start postion relative to vblank start */
386 vsync_pos
= (vblank_width
- vsync_width
) / 2;
387 adjusted_mode
->crtc_vsync_start
=
388 adjusted_mode
->crtc_vblank_start
+ vsync_pos
;
389 /* keep the vsync width constant */
390 adjusted_mode
->crtc_vsync_end
=
391 adjusted_mode
->crtc_vsync_start
+ vsync_width
;
394 case DRM_MODE_SCALE_ASPECT
:
395 /* Scale but preserve the spect ratio */
396 pfit_control
|= PFIT_ENABLE
;
398 /* 965+ is easy, it does everything in hw */
399 if (panel_ratio
> desired_ratio
)
400 pfit_control
|= PFIT_SCALING_PILLAR
;
401 else if (panel_ratio
< desired_ratio
)
402 pfit_control
|= PFIT_SCALING_LETTER
;
404 pfit_control
|= PFIT_SCALING_AUTO
;
407 * For earlier chips we have to calculate the scaling
408 * ratio by hand and program it into the
409 * PFIT_PGM_RATIO register
411 u32 horiz_bits
, vert_bits
, bits
= 12;
412 horiz_ratio
= mode
->hdisplay
* PANEL_RATIO_FACTOR
/
413 adjusted_mode
->hdisplay
;
414 vert_ratio
= mode
->vdisplay
* PANEL_RATIO_FACTOR
/
415 adjusted_mode
->vdisplay
;
416 horiz_scale
= adjusted_mode
->hdisplay
*
417 PANEL_RATIO_FACTOR
/ mode
->hdisplay
;
418 vert_scale
= adjusted_mode
->vdisplay
*
419 PANEL_RATIO_FACTOR
/ mode
->vdisplay
;
421 /* retain aspect ratio */
422 if (panel_ratio
> desired_ratio
) { /* Pillar */
424 scaled_width
= mode
->hdisplay
* vert_scale
/
426 horiz_ratio
= vert_ratio
;
427 pfit_control
|= (VERT_AUTO_SCALE
|
428 VERT_INTERP_BILINEAR
|
429 HORIZ_INTERP_BILINEAR
);
430 /* Pillar will have left/right borders */
431 left_border
= (adjusted_mode
->hdisplay
-
433 right_border
= left_border
;
434 if (mode
->hdisplay
& 1) /* odd resolutions */
436 /* keep the border be even */
437 if (right_border
& 1)
439 adjusted_mode
->crtc_hdisplay
= scaled_width
;
440 /* use border instead of border minus one */
441 adjusted_mode
->crtc_hblank_start
=
442 scaled_width
+ right_border
;
443 /* keep the hblank width constant */
444 adjusted_mode
->crtc_hblank_end
=
445 adjusted_mode
->crtc_hblank_start
+
448 * get the hsync start pos relative to
451 hsync_pos
= (hblank_width
- hsync_width
) / 2;
452 /* keep the hsync_pos be even */
455 adjusted_mode
->crtc_hsync_start
=
456 adjusted_mode
->crtc_hblank_start
+
458 /* keept hsync width constant */
459 adjusted_mode
->crtc_hsync_end
=
460 adjusted_mode
->crtc_hsync_start
+
463 } else if (panel_ratio
< desired_ratio
) { /* letter */
464 u32 scaled_height
= mode
->vdisplay
*
465 horiz_scale
/ PANEL_RATIO_FACTOR
;
466 vert_ratio
= horiz_ratio
;
467 pfit_control
|= (HORIZ_AUTO_SCALE
|
468 VERT_INTERP_BILINEAR
|
469 HORIZ_INTERP_BILINEAR
);
470 /* Letterbox will have top/bottom border */
471 top_border
= (adjusted_mode
->vdisplay
-
473 bottom_border
= top_border
;
474 if (mode
->vdisplay
& 1)
476 adjusted_mode
->crtc_vdisplay
= scaled_height
;
477 /* use border instead of border minus one */
478 adjusted_mode
->crtc_vblank_start
=
479 scaled_height
+ bottom_border
;
480 /* keep the vblank width constant */
481 adjusted_mode
->crtc_vblank_end
=
482 adjusted_mode
->crtc_vblank_start
+
485 * get the vsync start pos relative to
488 vsync_pos
= (vblank_width
- vsync_width
) / 2;
489 adjusted_mode
->crtc_vsync_start
=
490 adjusted_mode
->crtc_vblank_start
+
492 /* keep the vsync width constant */
493 adjusted_mode
->crtc_vsync_end
=
494 adjusted_mode
->crtc_vsync_start
+
498 /* Aspects match, Let hw scale both directions */
499 pfit_control
|= (VERT_AUTO_SCALE
|
501 VERT_INTERP_BILINEAR
|
502 HORIZ_INTERP_BILINEAR
);
504 horiz_bits
= (1 << bits
) * horiz_ratio
/
506 vert_bits
= (1 << bits
) * vert_ratio
/
509 ((vert_bits
<< PFIT_VERT_SCALE_SHIFT
) &
510 PFIT_VERT_SCALE_MASK
) |
511 ((horiz_bits
<< PFIT_HORIZ_SCALE_SHIFT
) &
512 PFIT_HORIZ_SCALE_MASK
);
516 case DRM_MODE_SCALE_FULLSCREEN
:
518 * Full scaling, even if it changes the aspect ratio.
519 * Fortunately this is all done for us in hw.
521 pfit_control
|= PFIT_ENABLE
;
523 pfit_control
|= PFIT_SCALING_AUTO
;
525 pfit_control
|= (VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
526 VERT_INTERP_BILINEAR
|
527 HORIZ_INTERP_BILINEAR
);
534 lvds_priv
->pfit_control
= pfit_control
;
535 lvds_priv
->pfit_pgm_ratios
= pfit_pgm_ratios
;
537 * When there exists the border, it means that the LVDS_BORDR
541 dev_priv
->lvds_border_bits
|= LVDS_BORDER_ENABLE
;
543 dev_priv
->lvds_border_bits
&= ~(LVDS_BORDER_ENABLE
);
545 * XXX: It would be nice to support lower refresh rates on the
546 * panels to reduce power consumption, and perhaps match the
547 * user's requested refresh rate.
553 static void intel_lvds_prepare(struct drm_encoder
*encoder
)
555 struct drm_device
*dev
= encoder
->dev
;
556 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
559 if (HAS_PCH_SPLIT(dev
))
560 reg
= BLC_PWM_CPU_CTL
;
564 dev_priv
->saveBLC_PWM_CTL
= I915_READ(reg
);
565 dev_priv
->backlight_duty_cycle
= (dev_priv
->saveBLC_PWM_CTL
&
566 BACKLIGHT_DUTY_CYCLE_MASK
);
568 intel_lvds_set_power(dev
, false);
571 static void intel_lvds_commit( struct drm_encoder
*encoder
)
573 struct drm_device
*dev
= encoder
->dev
;
574 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
576 if (dev_priv
->backlight_duty_cycle
== 0)
577 dev_priv
->backlight_duty_cycle
=
578 intel_lvds_get_max_backlight(dev
);
580 intel_lvds_set_power(dev
, true);
583 static void intel_lvds_mode_set(struct drm_encoder
*encoder
,
584 struct drm_display_mode
*mode
,
585 struct drm_display_mode
*adjusted_mode
)
587 struct drm_device
*dev
= encoder
->dev
;
588 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
589 struct intel_output
*intel_output
= enc_to_intel_output(encoder
);
590 struct intel_lvds_priv
*lvds_priv
= intel_output
->dev_priv
;
593 * The LVDS pin pair will already have been turned on in the
594 * intel_crtc_mode_set since it has a large impact on the DPLL
598 if (HAS_PCH_SPLIT(dev
))
602 * Enable automatic panel scaling so that non-native modes fill the
603 * screen. Should be enabled before the pipe is enabled, according to
604 * register description and PRM.
606 I915_WRITE(PFIT_PGM_RATIOS
, lvds_priv
->pfit_pgm_ratios
);
607 I915_WRITE(PFIT_CONTROL
, lvds_priv
->pfit_control
);
611 * Detect the LVDS connection.
613 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
614 * connected and closed means disconnected. We also send hotplug events as
615 * needed, using lid status notification from the input layer.
617 static enum drm_connector_status
intel_lvds_detect(struct drm_connector
*connector
)
619 struct drm_device
*dev
= connector
->dev
;
620 enum drm_connector_status status
= connector_status_connected
;
622 /* ACPI lid methods were generally unreliable in this generation, so
625 if (IS_GEN2(dev
) || IS_GEN3(dev
))
626 return connector_status_connected
;
632 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
634 static int intel_lvds_get_modes(struct drm_connector
*connector
)
636 struct drm_device
*dev
= connector
->dev
;
637 struct intel_output
*intel_output
= to_intel_output(connector
);
638 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
641 ret
= intel_ddc_get_modes(intel_output
);
646 /* Didn't get an EDID, so
647 * Set wide sync ranges so we get all modes
648 * handed to valid_mode for checking
650 connector
->display_info
.min_vfreq
= 0;
651 connector
->display_info
.max_vfreq
= 200;
652 connector
->display_info
.min_hfreq
= 0;
653 connector
->display_info
.max_hfreq
= 200;
655 if (dev_priv
->panel_fixed_mode
!= NULL
) {
656 struct drm_display_mode
*mode
;
658 mode
= drm_mode_duplicate(dev
, dev_priv
->panel_fixed_mode
);
659 drm_mode_probed_add(connector
, mode
);
668 * Lid events. Note the use of 'modeset_on_lid':
669 * - we set it on lid close, and reset it on open
670 * - we use it as a "only once" bit (ie we ignore
671 * duplicate events where it was already properly
673 * - the suspend/resume paths will also set it to
674 * zero, since they restore the mode ("lid open").
676 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
679 struct drm_i915_private
*dev_priv
=
680 container_of(nb
, struct drm_i915_private
, lid_notifier
);
681 struct drm_device
*dev
= dev_priv
->dev
;
682 struct drm_connector
*connector
= dev_priv
->int_lvds_connector
;
685 * check and update the status of LVDS connector after receiving
686 * the LID nofication event.
689 connector
->status
= connector
->funcs
->detect(connector
);
690 if (!acpi_lid_open()) {
691 dev_priv
->modeset_on_lid
= 1;
695 if (!dev_priv
->modeset_on_lid
)
698 dev_priv
->modeset_on_lid
= 0;
700 mutex_lock(&dev
->mode_config
.mutex
);
701 drm_helper_resume_force_mode(dev
);
702 mutex_unlock(&dev
->mode_config
.mutex
);
708 * intel_lvds_destroy - unregister and free LVDS structures
709 * @connector: connector to free
711 * Unregister the DDC bus for this connector then free the driver private
714 static void intel_lvds_destroy(struct drm_connector
*connector
)
716 struct drm_device
*dev
= connector
->dev
;
717 struct intel_output
*intel_output
= to_intel_output(connector
);
718 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
720 if (intel_output
->ddc_bus
)
721 intel_i2c_destroy(intel_output
->ddc_bus
);
722 if (dev_priv
->lid_notifier
.notifier_call
)
723 acpi_lid_notifier_unregister(&dev_priv
->lid_notifier
);
724 drm_sysfs_connector_remove(connector
);
725 drm_connector_cleanup(connector
);
729 static int intel_lvds_set_property(struct drm_connector
*connector
,
730 struct drm_property
*property
,
733 struct drm_device
*dev
= connector
->dev
;
734 struct intel_output
*intel_output
=
735 to_intel_output(connector
);
737 if (property
== dev
->mode_config
.scaling_mode_property
&&
738 connector
->encoder
) {
739 struct drm_crtc
*crtc
= connector
->encoder
->crtc
;
740 struct intel_lvds_priv
*lvds_priv
= intel_output
->dev_priv
;
741 if (value
== DRM_MODE_SCALE_NONE
) {
742 DRM_DEBUG_KMS("no scaling not supported\n");
745 if (lvds_priv
->fitting_mode
== value
) {
746 /* the LVDS scaling property is not changed */
749 lvds_priv
->fitting_mode
= value
;
750 if (crtc
&& crtc
->enabled
) {
752 * If the CRTC is enabled, the display will be changed
753 * according to the new panel fitting mode.
755 drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
756 crtc
->x
, crtc
->y
, crtc
->fb
);
763 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
764 .dpms
= intel_lvds_dpms
,
765 .mode_fixup
= intel_lvds_mode_fixup
,
766 .prepare
= intel_lvds_prepare
,
767 .mode_set
= intel_lvds_mode_set
,
768 .commit
= intel_lvds_commit
,
771 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
772 .get_modes
= intel_lvds_get_modes
,
773 .mode_valid
= intel_lvds_mode_valid
,
774 .best_encoder
= intel_best_encoder
,
777 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
778 .dpms
= drm_helper_connector_dpms
,
779 .save
= intel_lvds_save
,
780 .restore
= intel_lvds_restore
,
781 .detect
= intel_lvds_detect
,
782 .fill_modes
= drm_helper_probe_single_connector_modes
,
783 .set_property
= intel_lvds_set_property
,
784 .destroy
= intel_lvds_destroy
,
788 static void intel_lvds_enc_destroy(struct drm_encoder
*encoder
)
790 drm_encoder_cleanup(encoder
);
793 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
794 .destroy
= intel_lvds_enc_destroy
,
797 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
799 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id
->ident
);
803 /* These systems claim to have LVDS, but really don't */
804 static const struct dmi_system_id intel_no_lvds
[] = {
806 .callback
= intel_no_lvds_dmi_callback
,
807 .ident
= "Apple Mac Mini (Core series)",
809 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
810 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
814 .callback
= intel_no_lvds_dmi_callback
,
815 .ident
= "Apple Mac Mini (Core 2 series)",
817 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
818 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
822 .callback
= intel_no_lvds_dmi_callback
,
823 .ident
= "MSI IM-945GSE-A",
825 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
826 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
830 .callback
= intel_no_lvds_dmi_callback
,
831 .ident
= "Dell Studio Hybrid",
833 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
834 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
838 .callback
= intel_no_lvds_dmi_callback
,
839 .ident
= "AOpen Mini PC",
841 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
842 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
846 .callback
= intel_no_lvds_dmi_callback
,
847 .ident
= "AOpen Mini PC MP915",
849 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
850 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
854 .callback
= intel_no_lvds_dmi_callback
,
855 .ident
= "Aopen i945GTt-VFA",
857 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
861 { } /* terminating entry */
865 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
867 * @connector: LVDS connector
869 * Find the reduced downclock for LVDS in EDID.
871 static void intel_find_lvds_downclock(struct drm_device
*dev
,
872 struct drm_connector
*connector
)
874 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
875 struct drm_display_mode
*scan
, *panel_fixed_mode
;
878 panel_fixed_mode
= dev_priv
->panel_fixed_mode
;
879 temp_downclock
= panel_fixed_mode
->clock
;
881 mutex_lock(&dev
->mode_config
.mutex
);
882 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
884 * If one mode has the same resolution with the fixed_panel
885 * mode while they have the different refresh rate, it means
886 * that the reduced downclock is found for the LVDS. In such
887 * case we can set the different FPx0/1 to dynamically select
888 * between low and high frequency.
890 if (scan
->hdisplay
== panel_fixed_mode
->hdisplay
&&
891 scan
->hsync_start
== panel_fixed_mode
->hsync_start
&&
892 scan
->hsync_end
== panel_fixed_mode
->hsync_end
&&
893 scan
->htotal
== panel_fixed_mode
->htotal
&&
894 scan
->vdisplay
== panel_fixed_mode
->vdisplay
&&
895 scan
->vsync_start
== panel_fixed_mode
->vsync_start
&&
896 scan
->vsync_end
== panel_fixed_mode
->vsync_end
&&
897 scan
->vtotal
== panel_fixed_mode
->vtotal
) {
898 if (scan
->clock
< temp_downclock
) {
900 * The downclock is already found. But we
901 * expect to find the lower downclock.
903 temp_downclock
= scan
->clock
;
907 mutex_unlock(&dev
->mode_config
.mutex
);
908 if (temp_downclock
< panel_fixed_mode
->clock
&&
909 i915_lvds_downclock
) {
910 /* We found the downclock for LVDS. */
911 dev_priv
->lvds_downclock_avail
= 1;
912 dev_priv
->lvds_downclock
= temp_downclock
;
913 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
914 "Normal clock %dKhz, downclock %dKhz\n",
915 panel_fixed_mode
->clock
, temp_downclock
);
921 * Enumerate the child dev array parsed from VBT to check whether
922 * the LVDS is present.
923 * If it is present, return 1.
924 * If it is not present, return false.
925 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
926 * Note: The addin_offset should also be checked for LVDS panel.
927 * Only when it is non-zero, it is assumed that it is present.
929 static int lvds_is_present_in_vbt(struct drm_device
*dev
)
931 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
932 struct child_device_config
*p_child
;
935 if (!dev_priv
->child_dev_num
)
939 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
940 p_child
= dev_priv
->child_dev
+ i
;
942 * If the device type is not LFP, continue.
943 * If the device type is 0x22, it is also regarded as LFP.
945 if (p_child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
946 p_child
->device_type
!= DEVICE_TYPE_LFP
)
949 /* The addin_offset should be checked. Only when it is
950 * non-zero, it is regarded as present.
952 if (p_child
->addin_offset
) {
961 * intel_lvds_init - setup LVDS connectors on this device
964 * Create the connector, register the LVDS DDC bus, and try to figure out what
965 * modes we can display on the LVDS panel (if present).
967 void intel_lvds_init(struct drm_device
*dev
)
969 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
970 struct intel_output
*intel_output
;
971 struct drm_connector
*connector
;
972 struct drm_encoder
*encoder
;
973 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
974 struct drm_crtc
*crtc
;
975 struct intel_lvds_priv
*lvds_priv
;
977 int pipe
, gpio
= GPIOC
;
979 /* Skip init on machines we know falsely report LVDS */
980 if (dmi_check_system(intel_no_lvds
))
983 if (!lvds_is_present_in_vbt(dev
)) {
984 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
988 if (HAS_PCH_SPLIT(dev
)) {
989 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
991 if (dev_priv
->edp_support
) {
992 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
998 intel_output
= kzalloc(sizeof(struct intel_output
) +
999 sizeof(struct intel_lvds_priv
), GFP_KERNEL
);
1000 if (!intel_output
) {
1004 connector
= &intel_output
->base
;
1005 encoder
= &intel_output
->enc
;
1006 drm_connector_init(dev
, &intel_output
->base
, &intel_lvds_connector_funcs
,
1007 DRM_MODE_CONNECTOR_LVDS
);
1009 drm_encoder_init(dev
, &intel_output
->enc
, &intel_lvds_enc_funcs
,
1010 DRM_MODE_ENCODER_LVDS
);
1012 drm_mode_connector_attach_encoder(&intel_output
->base
, &intel_output
->enc
);
1013 intel_output
->type
= INTEL_OUTPUT_LVDS
;
1015 intel_output
->clone_mask
= (1 << INTEL_LVDS_CLONE_BIT
);
1016 intel_output
->crtc_mask
= (1 << 1);
1017 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
1018 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
1019 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
1020 connector
->interlace_allowed
= false;
1021 connector
->doublescan_allowed
= false;
1023 lvds_priv
= (struct intel_lvds_priv
*)(intel_output
+ 1);
1024 intel_output
->dev_priv
= lvds_priv
;
1025 /* create the scaling mode property */
1026 drm_mode_create_scaling_mode_property(dev
);
1028 * the initial panel fitting mode will be FULL_SCREEN.
1031 drm_connector_attach_property(&intel_output
->base
,
1032 dev
->mode_config
.scaling_mode_property
,
1033 DRM_MODE_SCALE_FULLSCREEN
);
1034 lvds_priv
->fitting_mode
= DRM_MODE_SCALE_FULLSCREEN
;
1037 * 1) check for EDID on DDC
1038 * 2) check for VBT data
1039 * 3) check to see if LVDS is already on
1040 * if none of the above, no panel
1041 * 4) make sure lid is open
1042 * if closed, act like it's not there for now
1045 /* Set up the DDC bus. */
1046 intel_output
->ddc_bus
= intel_i2c_create(dev
, gpio
, "LVDSDDC_C");
1047 if (!intel_output
->ddc_bus
) {
1048 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
1054 * Attempt to get the fixed panel mode from DDC. Assume that the
1055 * preferred mode is the right one.
1057 intel_ddc_get_modes(intel_output
);
1059 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
1060 mutex_lock(&dev
->mode_config
.mutex
);
1061 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
1062 dev_priv
->panel_fixed_mode
=
1063 drm_mode_duplicate(dev
, scan
);
1064 mutex_unlock(&dev
->mode_config
.mutex
);
1065 intel_find_lvds_downclock(dev
, connector
);
1068 mutex_unlock(&dev
->mode_config
.mutex
);
1071 /* Failed to get EDID, what about VBT? */
1072 if (dev_priv
->lfp_lvds_vbt_mode
) {
1073 mutex_lock(&dev
->mode_config
.mutex
);
1074 dev_priv
->panel_fixed_mode
=
1075 drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
1076 mutex_unlock(&dev
->mode_config
.mutex
);
1077 if (dev_priv
->panel_fixed_mode
) {
1078 dev_priv
->panel_fixed_mode
->type
|=
1079 DRM_MODE_TYPE_PREFERRED
;
1085 * If we didn't get EDID, try checking if the panel is already turned
1086 * on. If so, assume that whatever is currently programmed is the
1090 /* Ironlake: FIXME if still fail, not try pipe mode now */
1091 if (HAS_PCH_SPLIT(dev
))
1094 lvds
= I915_READ(LVDS
);
1095 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
1096 crtc
= intel_get_crtc_from_pipe(dev
, pipe
);
1098 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
1099 dev_priv
->panel_fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
1100 if (dev_priv
->panel_fixed_mode
) {
1101 dev_priv
->panel_fixed_mode
->type
|=
1102 DRM_MODE_TYPE_PREFERRED
;
1107 /* If we still don't have a mode after all that, give up. */
1108 if (!dev_priv
->panel_fixed_mode
)
1112 if (HAS_PCH_SPLIT(dev
)) {
1114 /* make sure PWM is enabled */
1115 pwm
= I915_READ(BLC_PWM_CPU_CTL2
);
1116 pwm
|= (PWM_ENABLE
| PWM_PIPE_B
);
1117 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
);
1119 pwm
= I915_READ(BLC_PWM_PCH_CTL1
);
1120 pwm
|= PWM_PCH_ENABLE
;
1121 I915_WRITE(BLC_PWM_PCH_CTL1
, pwm
);
1123 dev_priv
->lid_notifier
.notifier_call
= intel_lid_notify
;
1124 if (acpi_lid_notifier_register(&dev_priv
->lid_notifier
)) {
1125 DRM_DEBUG_KMS("lid notifier registration failed\n");
1126 dev_priv
->lid_notifier
.notifier_call
= NULL
;
1128 /* keep the LVDS connector */
1129 dev_priv
->int_lvds_connector
= connector
;
1130 drm_sysfs_connector_add(connector
);
1134 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1135 if (intel_output
->ddc_bus
)
1136 intel_i2c_destroy(intel_output
->ddc_bus
);
1137 drm_connector_cleanup(connector
);
1138 drm_encoder_cleanup(encoder
);
1139 kfree(intel_output
);