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 <linux/dmi.h>
31 #include <linux/i2c.h>
36 #include "intel_drv.h"
39 #include <linux/acpi.h>
41 #define I915_LVDS "i915_lvds"
44 * the following four scaling options are defined.
45 * #define DRM_MODE_SCALE_NON_GPU 0
46 * #define DRM_MODE_SCALE_FULLSCREEN 1
47 * #define DRM_MODE_SCALE_NO_SCALE 2
48 * #define DRM_MODE_SCALE_ASPECT 3
51 /* Private structure for the integrated LVDS support */
52 struct intel_lvds_priv
{
59 * Sets the backlight level.
61 * \param level backlight level, from 0 to intel_lvds_get_max_backlight().
63 static void intel_lvds_set_backlight(struct drm_device
*dev
, int level
)
65 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
69 reg
= BLC_PWM_CPU_CTL
;
73 blc_pwm_ctl
= I915_READ(reg
) & ~BACKLIGHT_DUTY_CYCLE_MASK
;
74 I915_WRITE(reg
, (blc_pwm_ctl
|
75 (level
<< BACKLIGHT_DUTY_CYCLE_SHIFT
)));
79 * Returns the maximum level of the backlight duty cycle field.
81 static u32
intel_lvds_get_max_backlight(struct drm_device
*dev
)
83 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
87 reg
= BLC_PWM_PCH_CTL2
;
91 return ((I915_READ(reg
) & BACKLIGHT_MODULATION_FREQ_MASK
) >>
92 BACKLIGHT_MODULATION_FREQ_SHIFT
) * 2;
96 * Sets the power state for the panel.
98 static void intel_lvds_set_power(struct drm_device
*dev
, bool on
)
100 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
101 u32 pp_status
, ctl_reg
, status_reg
;
104 ctl_reg
= PCH_PP_CONTROL
;
105 status_reg
= PCH_PP_STATUS
;
107 ctl_reg
= PP_CONTROL
;
108 status_reg
= PP_STATUS
;
112 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) |
115 pp_status
= I915_READ(status_reg
);
116 } while ((pp_status
& PP_ON
) == 0);
118 intel_lvds_set_backlight(dev
, dev_priv
->backlight_duty_cycle
);
120 intel_lvds_set_backlight(dev
, 0);
122 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) &
125 pp_status
= I915_READ(status_reg
);
126 } while (pp_status
& PP_ON
);
130 static void intel_lvds_dpms(struct drm_encoder
*encoder
, int mode
)
132 struct drm_device
*dev
= encoder
->dev
;
134 if (mode
== DRM_MODE_DPMS_ON
)
135 intel_lvds_set_power(dev
, true);
137 intel_lvds_set_power(dev
, false);
139 /* XXX: We never power down the LVDS pairs. */
142 static void intel_lvds_save(struct drm_connector
*connector
)
144 struct drm_device
*dev
= connector
->dev
;
145 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
146 u32 pp_on_reg
, pp_off_reg
, pp_ctl_reg
, pp_div_reg
;
150 pp_on_reg
= PCH_PP_ON_DELAYS
;
151 pp_off_reg
= PCH_PP_OFF_DELAYS
;
152 pp_ctl_reg
= PCH_PP_CONTROL
;
153 pp_div_reg
= PCH_PP_DIVISOR
;
154 pwm_ctl_reg
= BLC_PWM_CPU_CTL
;
156 pp_on_reg
= PP_ON_DELAYS
;
157 pp_off_reg
= PP_OFF_DELAYS
;
158 pp_ctl_reg
= PP_CONTROL
;
159 pp_div_reg
= PP_DIVISOR
;
160 pwm_ctl_reg
= BLC_PWM_CTL
;
163 dev_priv
->savePP_ON
= I915_READ(pp_on_reg
);
164 dev_priv
->savePP_OFF
= I915_READ(pp_off_reg
);
165 dev_priv
->savePP_CONTROL
= I915_READ(pp_ctl_reg
);
166 dev_priv
->savePP_DIVISOR
= I915_READ(pp_div_reg
);
167 dev_priv
->saveBLC_PWM_CTL
= I915_READ(pwm_ctl_reg
);
168 dev_priv
->backlight_duty_cycle
= (dev_priv
->saveBLC_PWM_CTL
&
169 BACKLIGHT_DUTY_CYCLE_MASK
);
172 * If the light is off at server startup, just make it full brightness
174 if (dev_priv
->backlight_duty_cycle
== 0)
175 dev_priv
->backlight_duty_cycle
=
176 intel_lvds_get_max_backlight(dev
);
179 static void intel_lvds_restore(struct drm_connector
*connector
)
181 struct drm_device
*dev
= connector
->dev
;
182 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
183 u32 pp_on_reg
, pp_off_reg
, pp_ctl_reg
, pp_div_reg
;
187 pp_on_reg
= PCH_PP_ON_DELAYS
;
188 pp_off_reg
= PCH_PP_OFF_DELAYS
;
189 pp_ctl_reg
= PCH_PP_CONTROL
;
190 pp_div_reg
= PCH_PP_DIVISOR
;
191 pwm_ctl_reg
= BLC_PWM_CPU_CTL
;
193 pp_on_reg
= PP_ON_DELAYS
;
194 pp_off_reg
= PP_OFF_DELAYS
;
195 pp_ctl_reg
= PP_CONTROL
;
196 pp_div_reg
= PP_DIVISOR
;
197 pwm_ctl_reg
= BLC_PWM_CTL
;
200 I915_WRITE(pwm_ctl_reg
, dev_priv
->saveBLC_PWM_CTL
);
201 I915_WRITE(pp_on_reg
, dev_priv
->savePP_ON
);
202 I915_WRITE(pp_off_reg
, dev_priv
->savePP_OFF
);
203 I915_WRITE(pp_div_reg
, dev_priv
->savePP_DIVISOR
);
204 I915_WRITE(pp_ctl_reg
, dev_priv
->savePP_CONTROL
);
205 if (dev_priv
->savePP_CONTROL
& POWER_TARGET_ON
)
206 intel_lvds_set_power(dev
, true);
208 intel_lvds_set_power(dev
, false);
211 static int intel_lvds_mode_valid(struct drm_connector
*connector
,
212 struct drm_display_mode
*mode
)
214 struct drm_device
*dev
= connector
->dev
;
215 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
216 struct drm_display_mode
*fixed_mode
= dev_priv
->panel_fixed_mode
;
219 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
221 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
228 static bool intel_lvds_mode_fixup(struct drm_encoder
*encoder
,
229 struct drm_display_mode
*mode
,
230 struct drm_display_mode
*adjusted_mode
)
233 * float point operation is not supported . So the PANEL_RATIO_FACTOR
234 * is defined, which can avoid the float point computation when
235 * calculating the panel ratio.
237 #define PANEL_RATIO_FACTOR 8192
238 struct drm_device
*dev
= encoder
->dev
;
239 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
240 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->crtc
);
241 struct drm_encoder
*tmp_encoder
;
242 struct intel_output
*intel_output
= enc_to_intel_output(encoder
);
243 struct intel_lvds_priv
*lvds_priv
= intel_output
->dev_priv
;
244 u32 pfit_control
= 0, pfit_pgm_ratios
= 0;
245 int left_border
= 0, right_border
= 0, top_border
= 0;
246 int bottom_border
= 0;
248 int panel_ratio
, desired_ratio
, vert_scale
, horiz_scale
;
249 int horiz_ratio
, vert_ratio
;
250 u32 hsync_width
, vsync_width
;
251 u32 hblank_width
, vblank_width
;
252 u32 hsync_pos
, vsync_pos
;
254 /* Should never happen!! */
255 if (!IS_I965G(dev
) && intel_crtc
->pipe
== 0) {
256 DRM_ERROR("Can't support LVDS on pipe A\n");
260 /* Should never happen!! */
261 list_for_each_entry(tmp_encoder
, &dev
->mode_config
.encoder_list
, head
) {
262 if (tmp_encoder
!= encoder
&& tmp_encoder
->crtc
== encoder
->crtc
) {
263 DRM_ERROR("Can't enable LVDS and another "
264 "encoder on the same pipe\n");
268 /* If we don't have a panel mode, there is nothing we can do */
269 if (dev_priv
->panel_fixed_mode
== NULL
)
272 * If we have timings from the BIOS for the panel, put them in
273 * to the adjusted mode. The CRTC will be set up for this mode,
274 * with the panel scaling set up to source from the H/VDisplay
275 * of the original mode.
277 if (dev_priv
->panel_fixed_mode
!= NULL
) {
278 adjusted_mode
->hdisplay
= dev_priv
->panel_fixed_mode
->hdisplay
;
279 adjusted_mode
->hsync_start
=
280 dev_priv
->panel_fixed_mode
->hsync_start
;
281 adjusted_mode
->hsync_end
=
282 dev_priv
->panel_fixed_mode
->hsync_end
;
283 adjusted_mode
->htotal
= dev_priv
->panel_fixed_mode
->htotal
;
284 adjusted_mode
->vdisplay
= dev_priv
->panel_fixed_mode
->vdisplay
;
285 adjusted_mode
->vsync_start
=
286 dev_priv
->panel_fixed_mode
->vsync_start
;
287 adjusted_mode
->vsync_end
=
288 dev_priv
->panel_fixed_mode
->vsync_end
;
289 adjusted_mode
->vtotal
= dev_priv
->panel_fixed_mode
->vtotal
;
290 adjusted_mode
->clock
= dev_priv
->panel_fixed_mode
->clock
;
291 drm_mode_set_crtcinfo(adjusted_mode
, CRTC_INTERLACE_HALVE_V
);
294 /* Make sure pre-965s set dither correctly */
295 if (!IS_I965G(dev
)) {
296 if (dev_priv
->panel_wants_dither
|| dev_priv
->lvds_dither
)
297 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
300 /* Native modes don't need fitting */
301 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
302 adjusted_mode
->vdisplay
== mode
->vdisplay
) {
308 /* full screen scale for now */
312 /* 965+ wants fuzzy fitting */
314 pfit_control
|= (intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
317 hsync_width
= adjusted_mode
->crtc_hsync_end
-
318 adjusted_mode
->crtc_hsync_start
;
319 vsync_width
= adjusted_mode
->crtc_vsync_end
-
320 adjusted_mode
->crtc_vsync_start
;
321 hblank_width
= adjusted_mode
->crtc_hblank_end
-
322 adjusted_mode
->crtc_hblank_start
;
323 vblank_width
= adjusted_mode
->crtc_vblank_end
-
324 adjusted_mode
->crtc_vblank_start
;
326 * Deal with panel fitting options. Figure out how to stretch the
327 * image based on its aspect ratio & the current panel fitting mode.
329 panel_ratio
= adjusted_mode
->hdisplay
* PANEL_RATIO_FACTOR
/
330 adjusted_mode
->vdisplay
;
331 desired_ratio
= mode
->hdisplay
* PANEL_RATIO_FACTOR
/
334 * Enable automatic panel scaling for non-native modes so that they fill
335 * the screen. Should be enabled before the pipe is enabled, according
336 * to register description and PRM.
337 * Change the value here to see the borders for debugging
339 if (!IS_IGDNG(dev
)) {
340 I915_WRITE(BCLRPAT_A
, 0);
341 I915_WRITE(BCLRPAT_B
, 0);
344 switch (lvds_priv
->fitting_mode
) {
345 case DRM_MODE_SCALE_NO_SCALE
:
347 * For centered modes, we have to calculate border widths &
348 * heights and modify the values programmed into the CRTC.
350 left_border
= (adjusted_mode
->hdisplay
- mode
->hdisplay
) / 2;
351 right_border
= left_border
;
352 if (mode
->hdisplay
& 1)
354 top_border
= (adjusted_mode
->vdisplay
- mode
->vdisplay
) / 2;
355 bottom_border
= top_border
;
356 if (mode
->vdisplay
& 1)
358 /* Set active & border values */
359 adjusted_mode
->crtc_hdisplay
= mode
->hdisplay
;
360 /* Keep the boder be even */
361 if (right_border
& 1)
363 /* use the border directly instead of border minuse one */
364 adjusted_mode
->crtc_hblank_start
= mode
->hdisplay
+
366 /* keep the blank width constant */
367 adjusted_mode
->crtc_hblank_end
=
368 adjusted_mode
->crtc_hblank_start
+ hblank_width
;
369 /* get the hsync pos relative to hblank start */
370 hsync_pos
= (hblank_width
- hsync_width
) / 2;
371 /* keep the hsync pos be even */
374 adjusted_mode
->crtc_hsync_start
=
375 adjusted_mode
->crtc_hblank_start
+ hsync_pos
;
376 /* keep the hsync width constant */
377 adjusted_mode
->crtc_hsync_end
=
378 adjusted_mode
->crtc_hsync_start
+ hsync_width
;
379 adjusted_mode
->crtc_vdisplay
= mode
->vdisplay
;
380 /* use the border instead of border minus one */
381 adjusted_mode
->crtc_vblank_start
= mode
->vdisplay
+
383 /* keep the vblank width constant */
384 adjusted_mode
->crtc_vblank_end
=
385 adjusted_mode
->crtc_vblank_start
+ vblank_width
;
386 /* get the vsync start postion relative to vblank start */
387 vsync_pos
= (vblank_width
- vsync_width
) / 2;
388 adjusted_mode
->crtc_vsync_start
=
389 adjusted_mode
->crtc_vblank_start
+ vsync_pos
;
390 /* keep the vsync width constant */
391 adjusted_mode
->crtc_vsync_end
=
392 adjusted_mode
->crtc_vblank_start
+ vsync_width
;
395 case DRM_MODE_SCALE_ASPECT
:
396 /* Scale but preserve the spect ratio */
397 pfit_control
|= PFIT_ENABLE
;
399 /* 965+ is easy, it does everything in hw */
400 if (panel_ratio
> desired_ratio
)
401 pfit_control
|= PFIT_SCALING_PILLAR
;
402 else if (panel_ratio
< desired_ratio
)
403 pfit_control
|= PFIT_SCALING_LETTER
;
405 pfit_control
|= PFIT_SCALING_AUTO
;
408 * For earlier chips we have to calculate the scaling
409 * ratio by hand and program it into the
410 * PFIT_PGM_RATIO register
412 u32 horiz_bits
, vert_bits
, bits
= 12;
413 horiz_ratio
= mode
->hdisplay
* PANEL_RATIO_FACTOR
/
414 adjusted_mode
->hdisplay
;
415 vert_ratio
= mode
->vdisplay
* PANEL_RATIO_FACTOR
/
416 adjusted_mode
->vdisplay
;
417 horiz_scale
= adjusted_mode
->hdisplay
*
418 PANEL_RATIO_FACTOR
/ mode
->hdisplay
;
419 vert_scale
= adjusted_mode
->vdisplay
*
420 PANEL_RATIO_FACTOR
/ mode
->vdisplay
;
422 /* retain aspect ratio */
423 if (panel_ratio
> desired_ratio
) { /* Pillar */
425 scaled_width
= mode
->hdisplay
* vert_scale
/
427 horiz_ratio
= vert_ratio
;
428 pfit_control
|= (VERT_AUTO_SCALE
|
429 VERT_INTERP_BILINEAR
|
430 HORIZ_INTERP_BILINEAR
);
431 /* Pillar will have left/right borders */
432 left_border
= (adjusted_mode
->hdisplay
-
434 right_border
= left_border
;
435 if (mode
->hdisplay
& 1) /* odd resolutions */
437 /* keep the border be even */
438 if (right_border
& 1)
440 adjusted_mode
->crtc_hdisplay
= scaled_width
;
441 /* use border instead of border minus one */
442 adjusted_mode
->crtc_hblank_start
=
443 scaled_width
+ right_border
;
444 /* keep the hblank width constant */
445 adjusted_mode
->crtc_hblank_end
=
446 adjusted_mode
->crtc_hblank_start
+
449 * get the hsync start pos relative to
452 hsync_pos
= (hblank_width
- hsync_width
) / 2;
453 /* keep the hsync_pos be even */
456 adjusted_mode
->crtc_hsync_start
=
457 adjusted_mode
->crtc_hblank_start
+
459 /* keept hsync width constant */
460 adjusted_mode
->crtc_hsync_end
=
461 adjusted_mode
->crtc_hsync_start
+
464 } else if (panel_ratio
< desired_ratio
) { /* letter */
465 u32 scaled_height
= mode
->vdisplay
*
466 horiz_scale
/ PANEL_RATIO_FACTOR
;
467 vert_ratio
= horiz_ratio
;
468 pfit_control
|= (HORIZ_AUTO_SCALE
|
469 VERT_INTERP_BILINEAR
|
470 HORIZ_INTERP_BILINEAR
);
471 /* Letterbox will have top/bottom border */
472 top_border
= (adjusted_mode
->vdisplay
-
474 bottom_border
= top_border
;
475 if (mode
->vdisplay
& 1)
477 adjusted_mode
->crtc_vdisplay
= scaled_height
;
478 /* use border instead of border minus one */
479 adjusted_mode
->crtc_vblank_start
=
480 scaled_height
+ bottom_border
;
481 /* keep the vblank width constant */
482 adjusted_mode
->crtc_vblank_end
=
483 adjusted_mode
->crtc_vblank_start
+
486 * get the vsync start pos relative to
489 vsync_pos
= (vblank_width
- vsync_width
) / 2;
490 adjusted_mode
->crtc_vsync_start
=
491 adjusted_mode
->crtc_vblank_start
+
493 /* keep the vsync width constant */
494 adjusted_mode
->crtc_vsync_end
=
495 adjusted_mode
->crtc_vsync_start
+
499 /* Aspects match, Let hw scale both directions */
500 pfit_control
|= (VERT_AUTO_SCALE
|
502 VERT_INTERP_BILINEAR
|
503 HORIZ_INTERP_BILINEAR
);
505 horiz_bits
= (1 << bits
) * horiz_ratio
/
507 vert_bits
= (1 << bits
) * vert_ratio
/
510 ((vert_bits
<< PFIT_VERT_SCALE_SHIFT
) &
511 PFIT_VERT_SCALE_MASK
) |
512 ((horiz_bits
<< PFIT_HORIZ_SCALE_SHIFT
) &
513 PFIT_HORIZ_SCALE_MASK
);
517 case DRM_MODE_SCALE_FULLSCREEN
:
519 * Full scaling, even if it changes the aspect ratio.
520 * Fortunately this is all done for us in hw.
522 pfit_control
|= PFIT_ENABLE
;
524 pfit_control
|= PFIT_SCALING_AUTO
;
526 pfit_control
|= (VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
527 VERT_INTERP_BILINEAR
|
528 HORIZ_INTERP_BILINEAR
);
535 lvds_priv
->pfit_control
= pfit_control
;
536 lvds_priv
->pfit_pgm_ratios
= pfit_pgm_ratios
;
538 * XXX: It would be nice to support lower refresh rates on the
539 * panels to reduce power consumption, and perhaps match the
540 * user's requested refresh rate.
546 static void intel_lvds_prepare(struct drm_encoder
*encoder
)
548 struct drm_device
*dev
= encoder
->dev
;
549 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
553 reg
= BLC_PWM_CPU_CTL
;
557 dev_priv
->saveBLC_PWM_CTL
= I915_READ(reg
);
558 dev_priv
->backlight_duty_cycle
= (dev_priv
->saveBLC_PWM_CTL
&
559 BACKLIGHT_DUTY_CYCLE_MASK
);
561 intel_lvds_set_power(dev
, false);
564 static void intel_lvds_commit( struct drm_encoder
*encoder
)
566 struct drm_device
*dev
= encoder
->dev
;
567 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
569 if (dev_priv
->backlight_duty_cycle
== 0)
570 dev_priv
->backlight_duty_cycle
=
571 intel_lvds_get_max_backlight(dev
);
573 intel_lvds_set_power(dev
, true);
576 static void intel_lvds_mode_set(struct drm_encoder
*encoder
,
577 struct drm_display_mode
*mode
,
578 struct drm_display_mode
*adjusted_mode
)
580 struct drm_device
*dev
= encoder
->dev
;
581 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
582 struct intel_output
*intel_output
= enc_to_intel_output(encoder
);
583 struct intel_lvds_priv
*lvds_priv
= intel_output
->dev_priv
;
586 * The LVDS pin pair will already have been turned on in the
587 * intel_crtc_mode_set since it has a large impact on the DPLL
595 * Enable automatic panel scaling so that non-native modes fill the
596 * screen. Should be enabled before the pipe is enabled, according to
597 * register description and PRM.
599 I915_WRITE(PFIT_PGM_RATIOS
, lvds_priv
->pfit_pgm_ratios
);
600 I915_WRITE(PFIT_CONTROL
, lvds_priv
->pfit_control
);
604 * Detect the LVDS connection.
606 * This always returns CONNECTOR_STATUS_CONNECTED. This connector should only have
607 * been set up if the LVDS was actually connected anyway.
609 static enum drm_connector_status
intel_lvds_detect(struct drm_connector
*connector
)
611 return connector_status_connected
;
615 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
617 static int intel_lvds_get_modes(struct drm_connector
*connector
)
619 struct drm_device
*dev
= connector
->dev
;
620 struct intel_output
*intel_output
= to_intel_output(connector
);
621 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
624 ret
= intel_ddc_get_modes(intel_output
);
629 /* Didn't get an EDID, so
630 * Set wide sync ranges so we get all modes
631 * handed to valid_mode for checking
633 connector
->display_info
.min_vfreq
= 0;
634 connector
->display_info
.max_vfreq
= 200;
635 connector
->display_info
.min_hfreq
= 0;
636 connector
->display_info
.max_hfreq
= 200;
638 if (dev_priv
->panel_fixed_mode
!= NULL
) {
639 struct drm_display_mode
*mode
;
641 mode
= drm_mode_duplicate(dev
, dev_priv
->panel_fixed_mode
);
642 drm_mode_probed_add(connector
, mode
);
651 * intel_lvds_destroy - unregister and free LVDS structures
652 * @connector: connector to free
654 * Unregister the DDC bus for this connector then free the driver private
657 static void intel_lvds_destroy(struct drm_connector
*connector
)
659 struct intel_output
*intel_output
= to_intel_output(connector
);
661 if (intel_output
->ddc_bus
)
662 intel_i2c_destroy(intel_output
->ddc_bus
);
663 drm_sysfs_connector_remove(connector
);
664 drm_connector_cleanup(connector
);
668 static int intel_lvds_set_property(struct drm_connector
*connector
,
669 struct drm_property
*property
,
672 struct drm_device
*dev
= connector
->dev
;
673 struct intel_output
*intel_output
=
674 to_intel_output(connector
);
676 if (property
== dev
->mode_config
.scaling_mode_property
&&
677 connector
->encoder
) {
678 struct drm_crtc
*crtc
= connector
->encoder
->crtc
;
679 struct intel_lvds_priv
*lvds_priv
= intel_output
->dev_priv
;
680 if (value
== DRM_MODE_SCALE_NON_GPU
) {
681 DRM_DEBUG_KMS(I915_LVDS
,
682 "non_GPU property is unsupported\n");
685 if (lvds_priv
->fitting_mode
== value
) {
686 /* the LVDS scaling property is not changed */
689 lvds_priv
->fitting_mode
= value
;
690 if (crtc
&& crtc
->enabled
) {
692 * If the CRTC is enabled, the display will be changed
693 * according to the new panel fitting mode.
695 drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
696 crtc
->x
, crtc
->y
, crtc
->fb
);
703 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
704 .dpms
= intel_lvds_dpms
,
705 .mode_fixup
= intel_lvds_mode_fixup
,
706 .prepare
= intel_lvds_prepare
,
707 .mode_set
= intel_lvds_mode_set
,
708 .commit
= intel_lvds_commit
,
711 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
712 .get_modes
= intel_lvds_get_modes
,
713 .mode_valid
= intel_lvds_mode_valid
,
714 .best_encoder
= intel_best_encoder
,
717 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
718 .dpms
= drm_helper_connector_dpms
,
719 .save
= intel_lvds_save
,
720 .restore
= intel_lvds_restore
,
721 .detect
= intel_lvds_detect
,
722 .fill_modes
= drm_helper_probe_single_connector_modes
,
723 .set_property
= intel_lvds_set_property
,
724 .destroy
= intel_lvds_destroy
,
728 static void intel_lvds_enc_destroy(struct drm_encoder
*encoder
)
730 drm_encoder_cleanup(encoder
);
733 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
734 .destroy
= intel_lvds_enc_destroy
,
737 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
739 DRM_DEBUG_KMS(I915_LVDS
,
740 "Skipping LVDS initialization for %s\n", id
->ident
);
744 /* These systems claim to have LVDS, but really don't */
745 static const struct dmi_system_id intel_no_lvds
[] = {
747 .callback
= intel_no_lvds_dmi_callback
,
748 .ident
= "Apple Mac Mini (Core series)",
750 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
751 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
755 .callback
= intel_no_lvds_dmi_callback
,
756 .ident
= "Apple Mac Mini (Core 2 series)",
758 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
759 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
763 .callback
= intel_no_lvds_dmi_callback
,
764 .ident
= "MSI IM-945GSE-A",
766 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
767 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
771 .callback
= intel_no_lvds_dmi_callback
,
772 .ident
= "Dell Studio Hybrid",
774 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
775 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
779 .callback
= intel_no_lvds_dmi_callback
,
780 .ident
= "AOpen Mini PC",
782 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
783 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
787 .callback
= intel_no_lvds_dmi_callback
,
788 .ident
= "AOpen Mini PC MP915",
790 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
791 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
795 .callback
= intel_no_lvds_dmi_callback
,
796 .ident
= "Aopen i945GTt-VFA",
798 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
802 { } /* terminating entry */
807 * check_lid_device -- check whether @handle is an ACPI LID device.
808 * @handle: ACPI device handle
809 * @level : depth in the ACPI namespace tree
810 * @context: the number of LID device when we find the device
811 * @rv: a return value to fill if desired (Not use)
814 check_lid_device(acpi_handle handle
, u32 level
, void *context
,
817 struct acpi_device
*acpi_dev
;
818 int *lid_present
= context
;
821 /* Get the acpi device for device handle */
822 if (acpi_bus_get_device(handle
, &acpi_dev
) || !acpi_dev
) {
823 /* If there is no ACPI device for handle, return */
827 if (!strncmp(acpi_device_hid(acpi_dev
), "PNP0C0D", 7))
834 * check whether there exists the ACPI LID device by enumerating the ACPI
837 static int intel_lid_present(void)
842 /* If ACPI is disabled, there is no ACPI device tree to
843 * check, so assume the LID device would have been present.
848 acpi_walk_namespace(ACPI_TYPE_DEVICE
, ACPI_ROOT_OBJECT
,
850 check_lid_device
, &lid_present
, NULL
);
855 static int intel_lid_present(void)
857 /* In the absence of ACPI built in, assume that the LID device would
865 * intel_lvds_init - setup LVDS connectors on this device
868 * Create the connector, register the LVDS DDC bus, and try to figure out what
869 * modes we can display on the LVDS panel (if present).
871 void intel_lvds_init(struct drm_device
*dev
)
873 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
874 struct intel_output
*intel_output
;
875 struct drm_connector
*connector
;
876 struct drm_encoder
*encoder
;
877 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
878 struct drm_crtc
*crtc
;
879 struct intel_lvds_priv
*lvds_priv
;
881 int pipe
, gpio
= GPIOC
;
883 /* Skip init on machines we know falsely report LVDS */
884 if (dmi_check_system(intel_no_lvds
))
887 /* Assume that any device without an ACPI LID device also doesn't
888 * have an integrated LVDS. We would be better off parsing the BIOS
889 * to get a reliable indicator, but that code isn't written yet.
891 * In the case of all-in-one desktops using LVDS that we've seen,
892 * they're using SDVO LVDS.
894 if (!intel_lid_present())
898 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
900 if (dev_priv
->edp_support
) {
901 DRM_DEBUG("disable LVDS for eDP support\n");
907 intel_output
= kzalloc(sizeof(struct intel_output
) +
908 sizeof(struct intel_lvds_priv
), GFP_KERNEL
);
913 connector
= &intel_output
->base
;
914 encoder
= &intel_output
->enc
;
915 drm_connector_init(dev
, &intel_output
->base
, &intel_lvds_connector_funcs
,
916 DRM_MODE_CONNECTOR_LVDS
);
918 drm_encoder_init(dev
, &intel_output
->enc
, &intel_lvds_enc_funcs
,
919 DRM_MODE_ENCODER_LVDS
);
921 drm_mode_connector_attach_encoder(&intel_output
->base
, &intel_output
->enc
);
922 intel_output
->type
= INTEL_OUTPUT_LVDS
;
924 intel_output
->clone_mask
= (1 << INTEL_LVDS_CLONE_BIT
);
925 intel_output
->crtc_mask
= (1 << 1);
926 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
927 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
928 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
929 connector
->interlace_allowed
= false;
930 connector
->doublescan_allowed
= false;
932 lvds_priv
= (struct intel_lvds_priv
*)(intel_output
+ 1);
933 intel_output
->dev_priv
= lvds_priv
;
934 /* create the scaling mode property */
935 drm_mode_create_scaling_mode_property(dev
);
937 * the initial panel fitting mode will be FULL_SCREEN.
940 drm_connector_attach_property(&intel_output
->base
,
941 dev
->mode_config
.scaling_mode_property
,
942 DRM_MODE_SCALE_FULLSCREEN
);
943 lvds_priv
->fitting_mode
= DRM_MODE_SCALE_FULLSCREEN
;
946 * 1) check for EDID on DDC
947 * 2) check for VBT data
948 * 3) check to see if LVDS is already on
949 * if none of the above, no panel
950 * 4) make sure lid is open
951 * if closed, act like it's not there for now
954 /* Set up the DDC bus. */
955 intel_output
->ddc_bus
= intel_i2c_create(dev
, gpio
, "LVDSDDC_C");
956 if (!intel_output
->ddc_bus
) {
957 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
963 * Attempt to get the fixed panel mode from DDC. Assume that the
964 * preferred mode is the right one.
966 intel_ddc_get_modes(intel_output
);
968 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
969 mutex_lock(&dev
->mode_config
.mutex
);
970 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
971 dev_priv
->panel_fixed_mode
=
972 drm_mode_duplicate(dev
, scan
);
973 mutex_unlock(&dev
->mode_config
.mutex
);
976 mutex_unlock(&dev
->mode_config
.mutex
);
979 /* Failed to get EDID, what about VBT? */
980 if (dev_priv
->lfp_lvds_vbt_mode
) {
981 mutex_lock(&dev
->mode_config
.mutex
);
982 dev_priv
->panel_fixed_mode
=
983 drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
984 mutex_unlock(&dev
->mode_config
.mutex
);
985 if (dev_priv
->panel_fixed_mode
) {
986 dev_priv
->panel_fixed_mode
->type
|=
987 DRM_MODE_TYPE_PREFERRED
;
993 * If we didn't get EDID, try checking if the panel is already turned
994 * on. If so, assume that whatever is currently programmed is the
998 /* IGDNG: FIXME if still fail, not try pipe mode now */
1002 lvds
= I915_READ(LVDS
);
1003 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
1004 crtc
= intel_get_crtc_from_pipe(dev
, pipe
);
1006 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
1007 dev_priv
->panel_fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
1008 if (dev_priv
->panel_fixed_mode
) {
1009 dev_priv
->panel_fixed_mode
->type
|=
1010 DRM_MODE_TYPE_PREFERRED
;
1015 /* If we still don't have a mode after all that, give up. */
1016 if (!dev_priv
->panel_fixed_mode
)
1020 if (IS_IGDNG(dev
)) {
1022 /* make sure PWM is enabled */
1023 pwm
= I915_READ(BLC_PWM_CPU_CTL2
);
1024 pwm
|= (PWM_ENABLE
| PWM_PIPE_B
);
1025 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
);
1027 pwm
= I915_READ(BLC_PWM_PCH_CTL1
);
1028 pwm
|= PWM_PCH_ENABLE
;
1029 I915_WRITE(BLC_PWM_PCH_CTL1
, pwm
);
1031 drm_sysfs_connector_add(connector
);
1035 DRM_DEBUG_KMS(I915_LVDS
, "No LVDS modes found, disabling.\n");
1036 if (intel_output
->ddc_bus
)
1037 intel_i2c_destroy(intel_output
->ddc_bus
);
1038 drm_connector_cleanup(connector
);
1039 kfree(intel_output
);