2 * Copyright © 2006-2007 Intel Corporation
3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Eric Anholt <eric@anholt.net>
26 * Dave Airlie <airlied@linux.ie>
27 * Jesse Barnes <jesse.barnes@intel.com>
30 #include <acpi/button.h>
31 #include <linux/dmi.h>
32 #include <linux/i2c.h>
33 #include <linux/slab.h>
38 #include "intel_drv.h"
41 #include <linux/acpi.h>
43 /* Private structure for the integrated LVDS support */
45 struct intel_encoder base
;
51 static struct intel_lvds
*enc_to_intel_lvds(struct drm_encoder
*encoder
)
53 return container_of(enc_to_intel_encoder(encoder
), struct intel_lvds
, base
);
57 * Sets the backlight level.
59 * \param level backlight level, from 0 to intel_lvds_get_max_backlight().
61 static void intel_lvds_set_backlight(struct drm_device
*dev
, int level
)
63 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
66 if (HAS_PCH_SPLIT(dev
))
67 reg
= BLC_PWM_CPU_CTL
;
71 blc_pwm_ctl
= I915_READ(reg
) & ~BACKLIGHT_DUTY_CYCLE_MASK
;
72 I915_WRITE(reg
, (blc_pwm_ctl
|
73 (level
<< BACKLIGHT_DUTY_CYCLE_SHIFT
)));
77 * Returns the maximum level of the backlight duty cycle field.
79 static u32
intel_lvds_get_max_backlight(struct drm_device
*dev
)
81 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
84 if (HAS_PCH_SPLIT(dev
))
85 reg
= BLC_PWM_PCH_CTL2
;
89 return ((I915_READ(reg
) & BACKLIGHT_MODULATION_FREQ_MASK
) >>
90 BACKLIGHT_MODULATION_FREQ_SHIFT
) * 2;
94 * Sets the power state for the panel.
96 static void intel_lvds_set_power(struct drm_device
*dev
, bool on
)
98 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
99 u32 ctl_reg
, status_reg
, lvds_reg
;
101 if (HAS_PCH_SPLIT(dev
)) {
102 ctl_reg
= PCH_PP_CONTROL
;
103 status_reg
= PCH_PP_STATUS
;
106 ctl_reg
= PP_CONTROL
;
107 status_reg
= PP_STATUS
;
112 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) | LVDS_PORT_EN
);
113 POSTING_READ(lvds_reg
);
115 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) |
117 if (wait_for(I915_READ(status_reg
) & PP_ON
, 1000, 0))
118 DRM_ERROR("timed out waiting to enable LVDS pipe");
120 intel_lvds_set_backlight(dev
, dev_priv
->backlight_duty_cycle
);
122 intel_lvds_set_backlight(dev
, 0);
124 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) &
126 if (wait_for((I915_READ(status_reg
) & PP_ON
) == 0, 1000, 0))
127 DRM_ERROR("timed out waiting for LVDS pipe to turn off");
129 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) & ~LVDS_PORT_EN
);
130 POSTING_READ(lvds_reg
);
134 static void intel_lvds_dpms(struct drm_encoder
*encoder
, int mode
)
136 struct drm_device
*dev
= encoder
->dev
;
138 if (mode
== DRM_MODE_DPMS_ON
)
139 intel_lvds_set_power(dev
, true);
141 intel_lvds_set_power(dev
, false);
143 /* XXX: We never power down the LVDS pairs. */
146 static int intel_lvds_mode_valid(struct drm_connector
*connector
,
147 struct drm_display_mode
*mode
)
149 struct drm_device
*dev
= connector
->dev
;
150 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
151 struct drm_display_mode
*fixed_mode
= dev_priv
->panel_fixed_mode
;
154 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
156 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
164 centre_horizontally(struct drm_display_mode
*mode
,
167 u32 border
, sync_pos
, blank_width
, sync_width
;
169 /* keep the hsync and hblank widths constant */
170 sync_width
= mode
->crtc_hsync_end
- mode
->crtc_hsync_start
;
171 blank_width
= mode
->crtc_hblank_end
- mode
->crtc_hblank_start
;
172 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
174 border
= (mode
->hdisplay
- width
+ 1) / 2;
175 border
+= border
& 1; /* make the border even */
177 mode
->crtc_hdisplay
= width
;
178 mode
->crtc_hblank_start
= width
+ border
;
179 mode
->crtc_hblank_end
= mode
->crtc_hblank_start
+ blank_width
;
181 mode
->crtc_hsync_start
= mode
->crtc_hblank_start
+ sync_pos
;
182 mode
->crtc_hsync_end
= mode
->crtc_hsync_start
+ sync_width
;
186 centre_vertically(struct drm_display_mode
*mode
,
189 u32 border
, sync_pos
, blank_width
, sync_width
;
191 /* keep the vsync and vblank widths constant */
192 sync_width
= mode
->crtc_vsync_end
- mode
->crtc_vsync_start
;
193 blank_width
= mode
->crtc_vblank_end
- mode
->crtc_vblank_start
;
194 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
196 border
= (mode
->vdisplay
- height
+ 1) / 2;
198 mode
->crtc_vdisplay
= height
;
199 mode
->crtc_vblank_start
= height
+ border
;
200 mode
->crtc_vblank_end
= mode
->crtc_vblank_start
+ blank_width
;
202 mode
->crtc_vsync_start
= mode
->crtc_vblank_start
+ sync_pos
;
203 mode
->crtc_vsync_end
= mode
->crtc_vsync_start
+ sync_width
;
206 static inline u32
panel_fitter_scaling(u32 source
, u32 target
)
209 * Floating point operation is not supported. So the FACTOR
210 * is defined, which can avoid the floating point computation
211 * when calculating the panel ratio.
214 #define FACTOR (1 << ACCURACY)
215 u32 ratio
= source
* FACTOR
/ target
;
216 return (FACTOR
* ratio
+ FACTOR
/2) / FACTOR
;
219 static bool intel_lvds_mode_fixup(struct drm_encoder
*encoder
,
220 struct drm_display_mode
*mode
,
221 struct drm_display_mode
*adjusted_mode
)
223 struct drm_device
*dev
= encoder
->dev
;
224 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
225 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->crtc
);
226 struct intel_lvds
*intel_lvds
= enc_to_intel_lvds(encoder
);
227 struct drm_encoder
*tmp_encoder
;
228 u32 pfit_control
= 0, pfit_pgm_ratios
= 0, border
= 0;
230 /* Should never happen!! */
231 if (!IS_I965G(dev
) && intel_crtc
->pipe
== 0) {
232 DRM_ERROR("Can't support LVDS on pipe A\n");
236 /* Should never happen!! */
237 list_for_each_entry(tmp_encoder
, &dev
->mode_config
.encoder_list
, head
) {
238 if (tmp_encoder
!= encoder
&& tmp_encoder
->crtc
== encoder
->crtc
) {
239 DRM_ERROR("Can't enable LVDS and another "
240 "encoder on the same pipe\n");
244 /* If we don't have a panel mode, there is nothing we can do */
245 if (dev_priv
->panel_fixed_mode
== NULL
)
249 * We have timings from the BIOS for the panel, put them in
250 * to the adjusted mode. The CRTC will be set up for this mode,
251 * with the panel scaling set up to source from the H/VDisplay
252 * of the original mode.
254 intel_fixed_panel_mode(dev_priv
->panel_fixed_mode
, adjusted_mode
);
256 if (HAS_PCH_SPLIT(dev
)) {
257 intel_pch_panel_fitting(dev
, intel_lvds
->fitting_mode
,
258 mode
, adjusted_mode
);
262 /* Make sure pre-965s set dither correctly */
263 if (!IS_I965G(dev
)) {
264 if (dev_priv
->panel_wants_dither
|| dev_priv
->lvds_dither
)
265 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
268 /* Native modes don't need fitting */
269 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
270 adjusted_mode
->vdisplay
== mode
->vdisplay
)
273 /* 965+ wants fuzzy fitting */
275 pfit_control
|= ((intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
279 * Enable automatic panel scaling for non-native modes so that they fill
280 * the screen. Should be enabled before the pipe is enabled, according
281 * to register description and PRM.
282 * Change the value here to see the borders for debugging
284 I915_WRITE(BCLRPAT_A
, 0);
285 I915_WRITE(BCLRPAT_B
, 0);
287 switch (intel_lvds
->fitting_mode
) {
288 case DRM_MODE_SCALE_CENTER
:
290 * For centered modes, we have to calculate border widths &
291 * heights and modify the values programmed into the CRTC.
293 centre_horizontally(adjusted_mode
, mode
->hdisplay
);
294 centre_vertically(adjusted_mode
, mode
->vdisplay
);
295 border
= LVDS_BORDER_ENABLE
;
298 case DRM_MODE_SCALE_ASPECT
:
299 /* Scale but preserve the aspect ratio */
301 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
302 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
304 pfit_control
|= PFIT_ENABLE
;
305 /* 965+ is easy, it does everything in hw */
306 if (scaled_width
> scaled_height
)
307 pfit_control
|= PFIT_SCALING_PILLAR
;
308 else if (scaled_width
< scaled_height
)
309 pfit_control
|= PFIT_SCALING_LETTER
;
311 pfit_control
|= PFIT_SCALING_AUTO
;
313 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
314 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
316 * For earlier chips we have to calculate the scaling
317 * ratio by hand and program it into the
318 * PFIT_PGM_RATIO register
320 if (scaled_width
> scaled_height
) { /* pillar */
321 centre_horizontally(adjusted_mode
, scaled_height
/ mode
->vdisplay
);
323 border
= LVDS_BORDER_ENABLE
;
324 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
) {
325 u32 bits
= panel_fitter_scaling(mode
->vdisplay
, adjusted_mode
->vdisplay
);
326 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
327 bits
<< PFIT_VERT_SCALE_SHIFT
);
328 pfit_control
|= (PFIT_ENABLE
|
329 VERT_INTERP_BILINEAR
|
330 HORIZ_INTERP_BILINEAR
);
332 } else if (scaled_width
< scaled_height
) { /* letter */
333 centre_vertically(adjusted_mode
, scaled_width
/ mode
->hdisplay
);
335 border
= LVDS_BORDER_ENABLE
;
336 if (mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
337 u32 bits
= panel_fitter_scaling(mode
->hdisplay
, adjusted_mode
->hdisplay
);
338 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
339 bits
<< PFIT_VERT_SCALE_SHIFT
);
340 pfit_control
|= (PFIT_ENABLE
|
341 VERT_INTERP_BILINEAR
|
342 HORIZ_INTERP_BILINEAR
);
345 /* Aspects match, Let hw scale both directions */
346 pfit_control
|= (PFIT_ENABLE
|
347 VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
348 VERT_INTERP_BILINEAR
|
349 HORIZ_INTERP_BILINEAR
);
353 case DRM_MODE_SCALE_FULLSCREEN
:
355 * Full scaling, even if it changes the aspect ratio.
356 * Fortunately this is all done for us in hw.
358 pfit_control
|= PFIT_ENABLE
;
360 pfit_control
|= PFIT_SCALING_AUTO
;
362 pfit_control
|= (VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
363 VERT_INTERP_BILINEAR
|
364 HORIZ_INTERP_BILINEAR
);
372 intel_lvds
->pfit_control
= pfit_control
;
373 intel_lvds
->pfit_pgm_ratios
= pfit_pgm_ratios
;
374 dev_priv
->lvds_border_bits
= border
;
377 * XXX: It would be nice to support lower refresh rates on the
378 * panels to reduce power consumption, and perhaps match the
379 * user's requested refresh rate.
385 static void intel_lvds_prepare(struct drm_encoder
*encoder
)
387 struct drm_device
*dev
= encoder
->dev
;
388 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
391 if (HAS_PCH_SPLIT(dev
))
392 reg
= BLC_PWM_CPU_CTL
;
396 dev_priv
->saveBLC_PWM_CTL
= I915_READ(reg
);
397 dev_priv
->backlight_duty_cycle
= (dev_priv
->saveBLC_PWM_CTL
&
398 BACKLIGHT_DUTY_CYCLE_MASK
);
400 intel_lvds_set_power(dev
, false);
403 static void intel_lvds_commit( struct drm_encoder
*encoder
)
405 struct drm_device
*dev
= encoder
->dev
;
406 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
408 if (dev_priv
->backlight_duty_cycle
== 0)
409 dev_priv
->backlight_duty_cycle
=
410 intel_lvds_get_max_backlight(dev
);
412 intel_lvds_set_power(dev
, true);
415 static void intel_lvds_mode_set(struct drm_encoder
*encoder
,
416 struct drm_display_mode
*mode
,
417 struct drm_display_mode
*adjusted_mode
)
419 struct drm_device
*dev
= encoder
->dev
;
420 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
421 struct intel_lvds
*intel_lvds
= enc_to_intel_lvds(encoder
);
424 * The LVDS pin pair will already have been turned on in the
425 * intel_crtc_mode_set since it has a large impact on the DPLL
429 if (HAS_PCH_SPLIT(dev
))
433 * Enable automatic panel scaling so that non-native modes fill the
434 * screen. Should be enabled before the pipe is enabled, according to
435 * register description and PRM.
437 I915_WRITE(PFIT_PGM_RATIOS
, intel_lvds
->pfit_pgm_ratios
);
438 I915_WRITE(PFIT_CONTROL
, intel_lvds
->pfit_control
);
442 * Detect the LVDS connection.
444 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
445 * connected and closed means disconnected. We also send hotplug events as
446 * needed, using lid status notification from the input layer.
448 static enum drm_connector_status
449 intel_lvds_detect(struct drm_connector
*connector
, bool force
)
451 struct drm_device
*dev
= connector
->dev
;
452 enum drm_connector_status status
= connector_status_connected
;
454 /* ACPI lid methods were generally unreliable in this generation, so
457 if (IS_GEN2(dev
) || IS_GEN3(dev
))
458 return connector_status_connected
;
464 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
466 static int intel_lvds_get_modes(struct drm_connector
*connector
)
468 struct drm_device
*dev
= connector
->dev
;
469 struct drm_encoder
*encoder
= intel_attached_encoder(connector
);
470 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
471 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
474 if (dev_priv
->lvds_edid_good
) {
475 ret
= intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
);
481 /* Didn't get an EDID, so
482 * Set wide sync ranges so we get all modes
483 * handed to valid_mode for checking
485 connector
->display_info
.min_vfreq
= 0;
486 connector
->display_info
.max_vfreq
= 200;
487 connector
->display_info
.min_hfreq
= 0;
488 connector
->display_info
.max_hfreq
= 200;
490 if (dev_priv
->panel_fixed_mode
!= NULL
) {
491 struct drm_display_mode
*mode
;
493 mode
= drm_mode_duplicate(dev
, dev_priv
->panel_fixed_mode
);
494 drm_mode_probed_add(connector
, mode
);
502 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id
*id
)
504 DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id
->ident
);
508 /* The GPU hangs up on these systems if modeset is performed on LID open */
509 static const struct dmi_system_id intel_no_modeset_on_lid
[] = {
511 .callback
= intel_no_modeset_on_lid_dmi_callback
,
512 .ident
= "Toshiba Tecra A11",
514 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
515 DMI_MATCH(DMI_PRODUCT_NAME
, "TECRA A11"),
519 { } /* terminating entry */
523 * Lid events. Note the use of 'modeset_on_lid':
524 * - we set it on lid close, and reset it on open
525 * - we use it as a "only once" bit (ie we ignore
526 * duplicate events where it was already properly
528 * - the suspend/resume paths will also set it to
529 * zero, since they restore the mode ("lid open").
531 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
534 struct drm_i915_private
*dev_priv
=
535 container_of(nb
, struct drm_i915_private
, lid_notifier
);
536 struct drm_device
*dev
= dev_priv
->dev
;
537 struct drm_connector
*connector
= dev_priv
->int_lvds_connector
;
540 * check and update the status of LVDS connector after receiving
541 * the LID nofication event.
544 connector
->status
= connector
->funcs
->detect(connector
,
547 /* Don't force modeset on machines where it causes a GPU lockup */
548 if (dmi_check_system(intel_no_modeset_on_lid
))
550 if (!acpi_lid_open()) {
551 dev_priv
->modeset_on_lid
= 1;
555 if (!dev_priv
->modeset_on_lid
)
558 dev_priv
->modeset_on_lid
= 0;
560 mutex_lock(&dev
->mode_config
.mutex
);
561 drm_helper_resume_force_mode(dev
);
562 mutex_unlock(&dev
->mode_config
.mutex
);
568 * intel_lvds_destroy - unregister and free LVDS structures
569 * @connector: connector to free
571 * Unregister the DDC bus for this connector then free the driver private
574 static void intel_lvds_destroy(struct drm_connector
*connector
)
576 struct drm_device
*dev
= connector
->dev
;
577 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
579 if (dev_priv
->lid_notifier
.notifier_call
)
580 acpi_lid_notifier_unregister(&dev_priv
->lid_notifier
);
581 drm_sysfs_connector_remove(connector
);
582 drm_connector_cleanup(connector
);
586 static int intel_lvds_set_property(struct drm_connector
*connector
,
587 struct drm_property
*property
,
590 struct drm_device
*dev
= connector
->dev
;
592 if (property
== dev
->mode_config
.scaling_mode_property
&&
593 connector
->encoder
) {
594 struct drm_crtc
*crtc
= connector
->encoder
->crtc
;
595 struct drm_encoder
*encoder
= connector
->encoder
;
596 struct intel_lvds
*intel_lvds
= enc_to_intel_lvds(encoder
);
598 if (value
== DRM_MODE_SCALE_NONE
) {
599 DRM_DEBUG_KMS("no scaling not supported\n");
602 if (intel_lvds
->fitting_mode
== value
) {
603 /* the LVDS scaling property is not changed */
606 intel_lvds
->fitting_mode
= value
;
607 if (crtc
&& crtc
->enabled
) {
609 * If the CRTC is enabled, the display will be changed
610 * according to the new panel fitting mode.
612 drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
613 crtc
->x
, crtc
->y
, crtc
->fb
);
620 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
621 .dpms
= intel_lvds_dpms
,
622 .mode_fixup
= intel_lvds_mode_fixup
,
623 .prepare
= intel_lvds_prepare
,
624 .mode_set
= intel_lvds_mode_set
,
625 .commit
= intel_lvds_commit
,
628 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
629 .get_modes
= intel_lvds_get_modes
,
630 .mode_valid
= intel_lvds_mode_valid
,
631 .best_encoder
= intel_attached_encoder
,
634 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
635 .dpms
= drm_helper_connector_dpms
,
636 .detect
= intel_lvds_detect
,
637 .fill_modes
= drm_helper_probe_single_connector_modes
,
638 .set_property
= intel_lvds_set_property
,
639 .destroy
= intel_lvds_destroy
,
642 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
643 .destroy
= intel_encoder_destroy
,
646 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
648 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id
->ident
);
652 /* These systems claim to have LVDS, but really don't */
653 static const struct dmi_system_id intel_no_lvds
[] = {
655 .callback
= intel_no_lvds_dmi_callback
,
656 .ident
= "Apple Mac Mini (Core series)",
658 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
659 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
663 .callback
= intel_no_lvds_dmi_callback
,
664 .ident
= "Apple Mac Mini (Core 2 series)",
666 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
667 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
671 .callback
= intel_no_lvds_dmi_callback
,
672 .ident
= "MSI IM-945GSE-A",
674 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
675 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
679 .callback
= intel_no_lvds_dmi_callback
,
680 .ident
= "Dell Studio Hybrid",
682 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
683 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
687 .callback
= intel_no_lvds_dmi_callback
,
688 .ident
= "AOpen Mini PC",
690 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
691 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
695 .callback
= intel_no_lvds_dmi_callback
,
696 .ident
= "AOpen Mini PC MP915",
698 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
699 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
703 .callback
= intel_no_lvds_dmi_callback
,
704 .ident
= "Aopen i945GTt-VFA",
706 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
710 .callback
= intel_no_lvds_dmi_callback
,
711 .ident
= "Clientron U800",
713 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
714 DMI_MATCH(DMI_PRODUCT_NAME
, "U800"),
718 { } /* terminating entry */
722 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
724 * @connector: LVDS connector
726 * Find the reduced downclock for LVDS in EDID.
728 static void intel_find_lvds_downclock(struct drm_device
*dev
,
729 struct drm_connector
*connector
)
731 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
732 struct drm_display_mode
*scan
, *panel_fixed_mode
;
735 panel_fixed_mode
= dev_priv
->panel_fixed_mode
;
736 temp_downclock
= panel_fixed_mode
->clock
;
738 mutex_lock(&dev
->mode_config
.mutex
);
739 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
741 * If one mode has the same resolution with the fixed_panel
742 * mode while they have the different refresh rate, it means
743 * that the reduced downclock is found for the LVDS. In such
744 * case we can set the different FPx0/1 to dynamically select
745 * between low and high frequency.
747 if (scan
->hdisplay
== panel_fixed_mode
->hdisplay
&&
748 scan
->hsync_start
== panel_fixed_mode
->hsync_start
&&
749 scan
->hsync_end
== panel_fixed_mode
->hsync_end
&&
750 scan
->htotal
== panel_fixed_mode
->htotal
&&
751 scan
->vdisplay
== panel_fixed_mode
->vdisplay
&&
752 scan
->vsync_start
== panel_fixed_mode
->vsync_start
&&
753 scan
->vsync_end
== panel_fixed_mode
->vsync_end
&&
754 scan
->vtotal
== panel_fixed_mode
->vtotal
) {
755 if (scan
->clock
< temp_downclock
) {
757 * The downclock is already found. But we
758 * expect to find the lower downclock.
760 temp_downclock
= scan
->clock
;
764 mutex_unlock(&dev
->mode_config
.mutex
);
765 if (temp_downclock
< panel_fixed_mode
->clock
&&
766 i915_lvds_downclock
) {
767 /* We found the downclock for LVDS. */
768 dev_priv
->lvds_downclock_avail
= 1;
769 dev_priv
->lvds_downclock
= temp_downclock
;
770 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
771 "Normal clock %dKhz, downclock %dKhz\n",
772 panel_fixed_mode
->clock
, temp_downclock
);
778 * Enumerate the child dev array parsed from VBT to check whether
779 * the LVDS is present.
780 * If it is present, return 1.
781 * If it is not present, return false.
782 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
783 * Note: The addin_offset should also be checked for LVDS panel.
784 * Only when it is non-zero, it is assumed that it is present.
786 static int lvds_is_present_in_vbt(struct drm_device
*dev
)
788 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
789 struct child_device_config
*p_child
;
792 if (!dev_priv
->child_dev_num
)
796 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
797 p_child
= dev_priv
->child_dev
+ i
;
799 * If the device type is not LFP, continue.
800 * If the device type is 0x22, it is also regarded as LFP.
802 if (p_child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
803 p_child
->device_type
!= DEVICE_TYPE_LFP
)
806 /* The addin_offset should be checked. Only when it is
807 * non-zero, it is regarded as present.
809 if (p_child
->addin_offset
) {
818 * intel_lvds_init - setup LVDS connectors on this device
821 * Create the connector, register the LVDS DDC bus, and try to figure out what
822 * modes we can display on the LVDS panel (if present).
824 void intel_lvds_init(struct drm_device
*dev
)
826 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
827 struct intel_lvds
*intel_lvds
;
828 struct intel_encoder
*intel_encoder
;
829 struct intel_connector
*intel_connector
;
830 struct drm_connector
*connector
;
831 struct drm_encoder
*encoder
;
832 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
833 struct drm_crtc
*crtc
;
835 int pipe
, gpio
= GPIOC
;
837 /* Skip init on machines we know falsely report LVDS */
838 if (dmi_check_system(intel_no_lvds
))
841 if (!lvds_is_present_in_vbt(dev
)) {
842 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
846 if (HAS_PCH_SPLIT(dev
)) {
847 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
849 if (dev_priv
->edp_support
) {
850 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
856 intel_lvds
= kzalloc(sizeof(struct intel_lvds
), GFP_KERNEL
);
861 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
862 if (!intel_connector
) {
867 intel_encoder
= &intel_lvds
->base
;
868 encoder
= &intel_encoder
->enc
;
869 connector
= &intel_connector
->base
;
870 drm_connector_init(dev
, &intel_connector
->base
, &intel_lvds_connector_funcs
,
871 DRM_MODE_CONNECTOR_LVDS
);
873 drm_encoder_init(dev
, &intel_encoder
->enc
, &intel_lvds_enc_funcs
,
874 DRM_MODE_ENCODER_LVDS
);
876 drm_mode_connector_attach_encoder(&intel_connector
->base
, &intel_encoder
->enc
);
877 intel_encoder
->type
= INTEL_OUTPUT_LVDS
;
879 intel_encoder
->clone_mask
= (1 << INTEL_LVDS_CLONE_BIT
);
880 intel_encoder
->crtc_mask
= (1 << 1);
881 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
882 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
883 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
884 connector
->interlace_allowed
= false;
885 connector
->doublescan_allowed
= false;
887 /* create the scaling mode property */
888 drm_mode_create_scaling_mode_property(dev
);
890 * the initial panel fitting mode will be FULL_SCREEN.
893 drm_connector_attach_property(&intel_connector
->base
,
894 dev
->mode_config
.scaling_mode_property
,
895 DRM_MODE_SCALE_ASPECT
);
896 intel_lvds
->fitting_mode
= DRM_MODE_SCALE_ASPECT
;
899 * 1) check for EDID on DDC
900 * 2) check for VBT data
901 * 3) check to see if LVDS is already on
902 * if none of the above, no panel
903 * 4) make sure lid is open
904 * if closed, act like it's not there for now
907 /* Set up the DDC bus. */
908 intel_encoder
->ddc_bus
= intel_i2c_create(dev
, gpio
, "LVDSDDC_C");
909 if (!intel_encoder
->ddc_bus
) {
910 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
916 * Attempt to get the fixed panel mode from DDC. Assume that the
917 * preferred mode is the right one.
919 dev_priv
->lvds_edid_good
= true;
921 if (!intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
))
922 dev_priv
->lvds_edid_good
= false;
924 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
925 mutex_lock(&dev
->mode_config
.mutex
);
926 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
927 dev_priv
->panel_fixed_mode
=
928 drm_mode_duplicate(dev
, scan
);
929 mutex_unlock(&dev
->mode_config
.mutex
);
930 intel_find_lvds_downclock(dev
, connector
);
933 mutex_unlock(&dev
->mode_config
.mutex
);
936 /* Failed to get EDID, what about VBT? */
937 if (dev_priv
->lfp_lvds_vbt_mode
) {
938 mutex_lock(&dev
->mode_config
.mutex
);
939 dev_priv
->panel_fixed_mode
=
940 drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
941 mutex_unlock(&dev
->mode_config
.mutex
);
942 if (dev_priv
->panel_fixed_mode
) {
943 dev_priv
->panel_fixed_mode
->type
|=
944 DRM_MODE_TYPE_PREFERRED
;
950 * If we didn't get EDID, try checking if the panel is already turned
951 * on. If so, assume that whatever is currently programmed is the
955 /* Ironlake: FIXME if still fail, not try pipe mode now */
956 if (HAS_PCH_SPLIT(dev
))
959 lvds
= I915_READ(LVDS
);
960 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
961 crtc
= intel_get_crtc_from_pipe(dev
, pipe
);
963 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
964 dev_priv
->panel_fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
965 if (dev_priv
->panel_fixed_mode
) {
966 dev_priv
->panel_fixed_mode
->type
|=
967 DRM_MODE_TYPE_PREFERRED
;
972 /* If we still don't have a mode after all that, give up. */
973 if (!dev_priv
->panel_fixed_mode
)
977 if (HAS_PCH_SPLIT(dev
)) {
979 /* make sure PWM is enabled */
980 pwm
= I915_READ(BLC_PWM_CPU_CTL2
);
981 pwm
|= (PWM_ENABLE
| PWM_PIPE_B
);
982 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
);
984 pwm
= I915_READ(BLC_PWM_PCH_CTL1
);
985 pwm
|= PWM_PCH_ENABLE
;
986 I915_WRITE(BLC_PWM_PCH_CTL1
, pwm
);
988 dev_priv
->lid_notifier
.notifier_call
= intel_lid_notify
;
989 if (acpi_lid_notifier_register(&dev_priv
->lid_notifier
)) {
990 DRM_DEBUG_KMS("lid notifier registration failed\n");
991 dev_priv
->lid_notifier
.notifier_call
= NULL
;
993 /* keep the LVDS connector */
994 dev_priv
->int_lvds_connector
= connector
;
995 drm_sysfs_connector_add(connector
);
999 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1000 if (intel_encoder
->ddc_bus
)
1001 intel_i2c_destroy(intel_encoder
->ddc_bus
);
1002 drm_connector_cleanup(connector
);
1003 drm_encoder_cleanup(encoder
);
1005 kfree(intel_connector
);