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(encoder
, struct intel_lvds
, base
.base
);
56 static void intel_lvds_lock_panel(struct drm_device
*dev
, bool lock
)
58 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
61 I915_WRITE(PP_CONTROL
, I915_READ(PP_CONTROL
) & 0x3);
63 I915_WRITE(PP_CONTROL
, I915_READ(PP_CONTROL
) | PANEL_UNLOCK_REGS
);
67 * Sets the power state for the panel.
69 static void intel_lvds_set_power(struct drm_device
*dev
, bool on
)
71 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
72 u32 ctl_reg
, status_reg
, lvds_reg
;
74 if (HAS_PCH_SPLIT(dev
)) {
75 ctl_reg
= PCH_PP_CONTROL
;
76 status_reg
= PCH_PP_STATUS
;
80 status_reg
= PP_STATUS
;
85 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) | LVDS_PORT_EN
);
86 POSTING_READ(lvds_reg
);
88 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) |
90 if (wait_for(I915_READ(status_reg
) & PP_ON
, 1000))
91 DRM_ERROR("timed out waiting to enable LVDS pipe");
93 intel_panel_set_backlight(dev
, dev_priv
->backlight_level
);
95 intel_panel_set_backlight(dev
, 0);
97 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) &
99 if (wait_for((I915_READ(status_reg
) & PP_ON
) == 0, 1000))
100 DRM_ERROR("timed out waiting for LVDS pipe to turn off");
102 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) & ~LVDS_PORT_EN
);
103 POSTING_READ(lvds_reg
);
107 static void intel_lvds_dpms(struct drm_encoder
*encoder
, int mode
)
109 struct drm_device
*dev
= encoder
->dev
;
111 if (mode
== DRM_MODE_DPMS_ON
)
112 intel_lvds_set_power(dev
, true);
114 intel_lvds_set_power(dev
, false);
116 /* XXX: We never power down the LVDS pairs. */
119 static int intel_lvds_mode_valid(struct drm_connector
*connector
,
120 struct drm_display_mode
*mode
)
122 struct drm_device
*dev
= connector
->dev
;
123 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
124 struct drm_display_mode
*fixed_mode
= dev_priv
->panel_fixed_mode
;
127 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
129 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
137 centre_horizontally(struct drm_display_mode
*mode
,
140 u32 border
, sync_pos
, blank_width
, sync_width
;
142 /* keep the hsync and hblank widths constant */
143 sync_width
= mode
->crtc_hsync_end
- mode
->crtc_hsync_start
;
144 blank_width
= mode
->crtc_hblank_end
- mode
->crtc_hblank_start
;
145 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
147 border
= (mode
->hdisplay
- width
+ 1) / 2;
148 border
+= border
& 1; /* make the border even */
150 mode
->crtc_hdisplay
= width
;
151 mode
->crtc_hblank_start
= width
+ border
;
152 mode
->crtc_hblank_end
= mode
->crtc_hblank_start
+ blank_width
;
154 mode
->crtc_hsync_start
= mode
->crtc_hblank_start
+ sync_pos
;
155 mode
->crtc_hsync_end
= mode
->crtc_hsync_start
+ sync_width
;
159 centre_vertically(struct drm_display_mode
*mode
,
162 u32 border
, sync_pos
, blank_width
, sync_width
;
164 /* keep the vsync and vblank widths constant */
165 sync_width
= mode
->crtc_vsync_end
- mode
->crtc_vsync_start
;
166 blank_width
= mode
->crtc_vblank_end
- mode
->crtc_vblank_start
;
167 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
169 border
= (mode
->vdisplay
- height
+ 1) / 2;
171 mode
->crtc_vdisplay
= height
;
172 mode
->crtc_vblank_start
= height
+ border
;
173 mode
->crtc_vblank_end
= mode
->crtc_vblank_start
+ blank_width
;
175 mode
->crtc_vsync_start
= mode
->crtc_vblank_start
+ sync_pos
;
176 mode
->crtc_vsync_end
= mode
->crtc_vsync_start
+ sync_width
;
179 static inline u32
panel_fitter_scaling(u32 source
, u32 target
)
182 * Floating point operation is not supported. So the FACTOR
183 * is defined, which can avoid the floating point computation
184 * when calculating the panel ratio.
187 #define FACTOR (1 << ACCURACY)
188 u32 ratio
= source
* FACTOR
/ target
;
189 return (FACTOR
* ratio
+ FACTOR
/2) / FACTOR
;
192 static bool intel_lvds_mode_fixup(struct drm_encoder
*encoder
,
193 struct drm_display_mode
*mode
,
194 struct drm_display_mode
*adjusted_mode
)
196 struct drm_device
*dev
= encoder
->dev
;
197 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
198 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->crtc
);
199 struct intel_lvds
*intel_lvds
= enc_to_intel_lvds(encoder
);
200 struct drm_encoder
*tmp_encoder
;
201 u32 pfit_control
= 0, pfit_pgm_ratios
= 0, border
= 0;
203 /* Should never happen!! */
204 if (!IS_I965G(dev
) && intel_crtc
->pipe
== 0) {
205 DRM_ERROR("Can't support LVDS on pipe A\n");
209 /* Should never happen!! */
210 list_for_each_entry(tmp_encoder
, &dev
->mode_config
.encoder_list
, head
) {
211 if (tmp_encoder
!= encoder
&& tmp_encoder
->crtc
== encoder
->crtc
) {
212 DRM_ERROR("Can't enable LVDS and another "
213 "encoder on the same pipe\n");
217 /* If we don't have a panel mode, there is nothing we can do */
218 if (dev_priv
->panel_fixed_mode
== NULL
)
222 * We have timings from the BIOS for the panel, put them in
223 * to the adjusted mode. The CRTC will be set up for this mode,
224 * with the panel scaling set up to source from the H/VDisplay
225 * of the original mode.
227 intel_fixed_panel_mode(dev_priv
->panel_fixed_mode
, adjusted_mode
);
229 if (HAS_PCH_SPLIT(dev
)) {
230 intel_pch_panel_fitting(dev
, intel_lvds
->fitting_mode
,
231 mode
, adjusted_mode
);
235 /* Make sure pre-965s set dither correctly */
236 if (!IS_I965G(dev
)) {
237 if (dev_priv
->panel_wants_dither
|| dev_priv
->lvds_dither
)
238 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
241 /* Native modes don't need fitting */
242 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
243 adjusted_mode
->vdisplay
== mode
->vdisplay
)
246 /* 965+ wants fuzzy fitting */
248 pfit_control
|= ((intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
252 * Enable automatic panel scaling for non-native modes so that they fill
253 * the screen. Should be enabled before the pipe is enabled, according
254 * to register description and PRM.
255 * Change the value here to see the borders for debugging
257 I915_WRITE(BCLRPAT_A
, 0);
258 I915_WRITE(BCLRPAT_B
, 0);
260 switch (intel_lvds
->fitting_mode
) {
261 case DRM_MODE_SCALE_CENTER
:
263 * For centered modes, we have to calculate border widths &
264 * heights and modify the values programmed into the CRTC.
266 centre_horizontally(adjusted_mode
, mode
->hdisplay
);
267 centre_vertically(adjusted_mode
, mode
->vdisplay
);
268 border
= LVDS_BORDER_ENABLE
;
271 case DRM_MODE_SCALE_ASPECT
:
272 /* Scale but preserve the aspect ratio */
274 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
275 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
277 pfit_control
|= PFIT_ENABLE
;
278 /* 965+ is easy, it does everything in hw */
279 if (scaled_width
> scaled_height
)
280 pfit_control
|= PFIT_SCALING_PILLAR
;
281 else if (scaled_width
< scaled_height
)
282 pfit_control
|= PFIT_SCALING_LETTER
;
284 pfit_control
|= PFIT_SCALING_AUTO
;
286 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
287 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
289 * For earlier chips we have to calculate the scaling
290 * ratio by hand and program it into the
291 * PFIT_PGM_RATIO register
293 if (scaled_width
> scaled_height
) { /* pillar */
294 centre_horizontally(adjusted_mode
, scaled_height
/ mode
->vdisplay
);
296 border
= LVDS_BORDER_ENABLE
;
297 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
) {
298 u32 bits
= panel_fitter_scaling(mode
->vdisplay
, adjusted_mode
->vdisplay
);
299 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
300 bits
<< PFIT_VERT_SCALE_SHIFT
);
301 pfit_control
|= (PFIT_ENABLE
|
302 VERT_INTERP_BILINEAR
|
303 HORIZ_INTERP_BILINEAR
);
305 } else if (scaled_width
< scaled_height
) { /* letter */
306 centre_vertically(adjusted_mode
, scaled_width
/ mode
->hdisplay
);
308 border
= LVDS_BORDER_ENABLE
;
309 if (mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
310 u32 bits
= panel_fitter_scaling(mode
->hdisplay
, adjusted_mode
->hdisplay
);
311 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
312 bits
<< PFIT_VERT_SCALE_SHIFT
);
313 pfit_control
|= (PFIT_ENABLE
|
314 VERT_INTERP_BILINEAR
|
315 HORIZ_INTERP_BILINEAR
);
318 /* Aspects match, Let hw scale both directions */
319 pfit_control
|= (PFIT_ENABLE
|
320 VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
321 VERT_INTERP_BILINEAR
|
322 HORIZ_INTERP_BILINEAR
);
326 case DRM_MODE_SCALE_FULLSCREEN
:
328 * Full scaling, even if it changes the aspect ratio.
329 * Fortunately this is all done for us in hw.
331 pfit_control
|= PFIT_ENABLE
;
333 pfit_control
|= PFIT_SCALING_AUTO
;
335 pfit_control
|= (VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
336 VERT_INTERP_BILINEAR
|
337 HORIZ_INTERP_BILINEAR
);
345 intel_lvds
->pfit_control
= pfit_control
;
346 intel_lvds
->pfit_pgm_ratios
= pfit_pgm_ratios
;
347 dev_priv
->lvds_border_bits
= border
;
350 * XXX: It would be nice to support lower refresh rates on the
351 * panels to reduce power consumption, and perhaps match the
352 * user's requested refresh rate.
358 static void intel_lvds_prepare(struct drm_encoder
*encoder
)
360 struct drm_device
*dev
= encoder
->dev
;
361 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
362 struct intel_lvds
*intel_lvds
= enc_to_intel_lvds(encoder
);
364 dev_priv
->backlight_level
= intel_panel_get_backlight(dev
);
366 if (intel_lvds
->pfit_control
== I915_READ(PFIT_CONTROL
))
367 intel_lvds_lock_panel(dev
, false);
369 intel_lvds_set_power(dev
, false);
372 static void intel_lvds_commit( struct drm_encoder
*encoder
)
374 struct drm_device
*dev
= encoder
->dev
;
375 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
377 if (dev_priv
->backlight_level
== 0)
378 dev_priv
->backlight_level
= intel_panel_get_max_backlight(dev
);
380 if ((I915_READ(PP_CONTROL
) & PANEL_UNLOCK_REGS
) == PANEL_UNLOCK_REGS
)
381 intel_lvds_lock_panel(dev
, true);
383 intel_lvds_set_power(dev
, true);
386 static void intel_lvds_mode_set(struct drm_encoder
*encoder
,
387 struct drm_display_mode
*mode
,
388 struct drm_display_mode
*adjusted_mode
)
390 struct drm_device
*dev
= encoder
->dev
;
391 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
392 struct intel_lvds
*intel_lvds
= enc_to_intel_lvds(encoder
);
395 * The LVDS pin pair will already have been turned on in the
396 * intel_crtc_mode_set since it has a large impact on the DPLL
400 if (HAS_PCH_SPLIT(dev
))
404 * Enable automatic panel scaling so that non-native modes fill the
405 * screen. Should be enabled before the pipe is enabled, according to
406 * register description and PRM.
408 I915_WRITE(PFIT_PGM_RATIOS
, intel_lvds
->pfit_pgm_ratios
);
409 I915_WRITE(PFIT_CONTROL
, intel_lvds
->pfit_control
);
413 * Detect the LVDS connection.
415 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
416 * connected and closed means disconnected. We also send hotplug events as
417 * needed, using lid status notification from the input layer.
419 static enum drm_connector_status
intel_lvds_detect(struct drm_connector
*connector
)
421 struct drm_device
*dev
= connector
->dev
;
422 enum drm_connector_status status
= connector_status_connected
;
424 /* ACPI lid methods were generally unreliable in this generation, so
427 if (IS_GEN2(dev
) || IS_GEN3(dev
))
428 return connector_status_connected
;
434 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
436 static int intel_lvds_get_modes(struct drm_connector
*connector
)
438 struct drm_device
*dev
= connector
->dev
;
439 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
441 if (dev_priv
->lvds_edid_good
) {
442 struct intel_encoder
*encoder
= intel_attached_encoder(connector
);
443 int ret
= intel_ddc_get_modes(connector
, encoder
->ddc_bus
);
448 /* Didn't get an EDID, so
449 * Set wide sync ranges so we get all modes
450 * handed to valid_mode for checking
452 connector
->display_info
.min_vfreq
= 0;
453 connector
->display_info
.max_vfreq
= 200;
454 connector
->display_info
.min_hfreq
= 0;
455 connector
->display_info
.max_hfreq
= 200;
457 if (dev_priv
->panel_fixed_mode
!= NULL
) {
458 struct drm_display_mode
*mode
;
460 mode
= drm_mode_duplicate(dev
, dev_priv
->panel_fixed_mode
);
461 drm_mode_probed_add(connector
, mode
);
469 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id
*id
)
471 DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id
->ident
);
475 /* The GPU hangs up on these systems if modeset is performed on LID open */
476 static const struct dmi_system_id intel_no_modeset_on_lid
[] = {
478 .callback
= intel_no_modeset_on_lid_dmi_callback
,
479 .ident
= "Toshiba Tecra A11",
481 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
482 DMI_MATCH(DMI_PRODUCT_NAME
, "TECRA A11"),
486 { } /* terminating entry */
490 * Lid events. Note the use of 'modeset_on_lid':
491 * - we set it on lid close, and reset it on open
492 * - we use it as a "only once" bit (ie we ignore
493 * duplicate events where it was already properly
495 * - the suspend/resume paths will also set it to
496 * zero, since they restore the mode ("lid open").
498 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
501 struct drm_i915_private
*dev_priv
=
502 container_of(nb
, struct drm_i915_private
, lid_notifier
);
503 struct drm_device
*dev
= dev_priv
->dev
;
504 struct drm_connector
*connector
= dev_priv
->int_lvds_connector
;
507 * check and update the status of LVDS connector after receiving
508 * the LID nofication event.
511 connector
->status
= connector
->funcs
->detect(connector
);
512 /* Don't force modeset on machines where it causes a GPU lockup */
513 if (dmi_check_system(intel_no_modeset_on_lid
))
515 if (!acpi_lid_open()) {
516 dev_priv
->modeset_on_lid
= 1;
520 if (!dev_priv
->modeset_on_lid
)
523 dev_priv
->modeset_on_lid
= 0;
525 mutex_lock(&dev
->mode_config
.mutex
);
526 drm_helper_resume_force_mode(dev
);
527 mutex_unlock(&dev
->mode_config
.mutex
);
533 * intel_lvds_destroy - unregister and free LVDS structures
534 * @connector: connector to free
536 * Unregister the DDC bus for this connector then free the driver private
539 static void intel_lvds_destroy(struct drm_connector
*connector
)
541 struct drm_device
*dev
= connector
->dev
;
542 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
544 if (dev_priv
->lid_notifier
.notifier_call
)
545 acpi_lid_notifier_unregister(&dev_priv
->lid_notifier
);
546 drm_sysfs_connector_remove(connector
);
547 drm_connector_cleanup(connector
);
551 static int intel_lvds_set_property(struct drm_connector
*connector
,
552 struct drm_property
*property
,
555 struct drm_device
*dev
= connector
->dev
;
557 if (property
== dev
->mode_config
.scaling_mode_property
&&
558 connector
->encoder
) {
559 struct drm_crtc
*crtc
= connector
->encoder
->crtc
;
560 struct drm_encoder
*encoder
= connector
->encoder
;
561 struct intel_lvds
*intel_lvds
= enc_to_intel_lvds(encoder
);
563 if (value
== DRM_MODE_SCALE_NONE
) {
564 DRM_DEBUG_KMS("no scaling not supported\n");
567 if (intel_lvds
->fitting_mode
== value
) {
568 /* the LVDS scaling property is not changed */
571 intel_lvds
->fitting_mode
= value
;
572 if (crtc
&& crtc
->enabled
) {
574 * If the CRTC is enabled, the display will be changed
575 * according to the new panel fitting mode.
577 drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
578 crtc
->x
, crtc
->y
, crtc
->fb
);
585 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
586 .dpms
= intel_lvds_dpms
,
587 .mode_fixup
= intel_lvds_mode_fixup
,
588 .prepare
= intel_lvds_prepare
,
589 .mode_set
= intel_lvds_mode_set
,
590 .commit
= intel_lvds_commit
,
593 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
594 .get_modes
= intel_lvds_get_modes
,
595 .mode_valid
= intel_lvds_mode_valid
,
596 .best_encoder
= intel_best_encoder
,
599 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
600 .dpms
= drm_helper_connector_dpms
,
601 .detect
= intel_lvds_detect
,
602 .fill_modes
= drm_helper_probe_single_connector_modes
,
603 .set_property
= intel_lvds_set_property
,
604 .destroy
= intel_lvds_destroy
,
607 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
608 .destroy
= intel_encoder_destroy
,
611 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
613 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id
->ident
);
617 /* These systems claim to have LVDS, but really don't */
618 static const struct dmi_system_id intel_no_lvds
[] = {
620 .callback
= intel_no_lvds_dmi_callback
,
621 .ident
= "Apple Mac Mini (Core series)",
623 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
624 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
628 .callback
= intel_no_lvds_dmi_callback
,
629 .ident
= "Apple Mac Mini (Core 2 series)",
631 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
632 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
636 .callback
= intel_no_lvds_dmi_callback
,
637 .ident
= "MSI IM-945GSE-A",
639 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
640 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
644 .callback
= intel_no_lvds_dmi_callback
,
645 .ident
= "Dell Studio Hybrid",
647 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
648 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
652 .callback
= intel_no_lvds_dmi_callback
,
653 .ident
= "AOpen Mini PC",
655 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
656 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
660 .callback
= intel_no_lvds_dmi_callback
,
661 .ident
= "AOpen Mini PC MP915",
663 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
664 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
668 .callback
= intel_no_lvds_dmi_callback
,
669 .ident
= "Aopen i945GTt-VFA",
671 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
675 .callback
= intel_no_lvds_dmi_callback
,
676 .ident
= "Clientron U800",
678 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
679 DMI_MATCH(DMI_PRODUCT_NAME
, "U800"),
683 { } /* terminating entry */
687 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
689 * @connector: LVDS connector
691 * Find the reduced downclock for LVDS in EDID.
693 static void intel_find_lvds_downclock(struct drm_device
*dev
,
694 struct drm_connector
*connector
)
696 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
697 struct drm_display_mode
*scan
, *panel_fixed_mode
;
700 panel_fixed_mode
= dev_priv
->panel_fixed_mode
;
701 temp_downclock
= panel_fixed_mode
->clock
;
703 mutex_lock(&dev
->mode_config
.mutex
);
704 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
706 * If one mode has the same resolution with the fixed_panel
707 * mode while they have the different refresh rate, it means
708 * that the reduced downclock is found for the LVDS. In such
709 * case we can set the different FPx0/1 to dynamically select
710 * between low and high frequency.
712 if (scan
->hdisplay
== panel_fixed_mode
->hdisplay
&&
713 scan
->hsync_start
== panel_fixed_mode
->hsync_start
&&
714 scan
->hsync_end
== panel_fixed_mode
->hsync_end
&&
715 scan
->htotal
== panel_fixed_mode
->htotal
&&
716 scan
->vdisplay
== panel_fixed_mode
->vdisplay
&&
717 scan
->vsync_start
== panel_fixed_mode
->vsync_start
&&
718 scan
->vsync_end
== panel_fixed_mode
->vsync_end
&&
719 scan
->vtotal
== panel_fixed_mode
->vtotal
) {
720 if (scan
->clock
< temp_downclock
) {
722 * The downclock is already found. But we
723 * expect to find the lower downclock.
725 temp_downclock
= scan
->clock
;
729 mutex_unlock(&dev
->mode_config
.mutex
);
730 if (temp_downclock
< panel_fixed_mode
->clock
&&
731 i915_lvds_downclock
) {
732 /* We found the downclock for LVDS. */
733 dev_priv
->lvds_downclock_avail
= 1;
734 dev_priv
->lvds_downclock
= temp_downclock
;
735 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
736 "Normal clock %dKhz, downclock %dKhz\n",
737 panel_fixed_mode
->clock
, temp_downclock
);
743 * Enumerate the child dev array parsed from VBT to check whether
744 * the LVDS is present.
745 * If it is present, return 1.
746 * If it is not present, return false.
747 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
749 static bool lvds_is_present_in_vbt(struct drm_device
*dev
)
751 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
754 if (!dev_priv
->child_dev_num
)
757 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
758 struct child_device_config
*child
= dev_priv
->child_dev
+ i
;
760 /* If the device type is not LFP, continue.
761 * We have to check both the new identifiers as well as the
762 * old for compatibility with some BIOSes.
764 if (child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
765 child
->device_type
!= DEVICE_TYPE_LFP
)
768 /* However, we cannot trust the BIOS writers to populate
769 * the VBT correctly. Since LVDS requires additional
770 * information from AIM blocks, a non-zero addin offset is
771 * a good indicator that the LVDS is actually present.
773 if (child
->addin_offset
)
776 /* But even then some BIOS writers perform some black magic
777 * and instantiate the device without reference to any
778 * additional data. Trust that if the VBT was written into
779 * the OpRegion then they have validated the LVDS's existence.
781 if (dev_priv
->opregion
.vbt
)
789 * intel_lvds_init - setup LVDS connectors on this device
792 * Create the connector, register the LVDS DDC bus, and try to figure out what
793 * modes we can display on the LVDS panel (if present).
795 void intel_lvds_init(struct drm_device
*dev
)
797 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
798 struct intel_lvds
*intel_lvds
;
799 struct intel_encoder
*intel_encoder
;
800 struct intel_connector
*intel_connector
;
801 struct drm_connector
*connector
;
802 struct drm_encoder
*encoder
;
803 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
804 struct drm_crtc
*crtc
;
806 int pipe
, gpio
= GPIOC
;
808 /* Skip init on machines we know falsely report LVDS */
809 if (dmi_check_system(intel_no_lvds
))
812 if (!lvds_is_present_in_vbt(dev
)) {
813 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
817 if (HAS_PCH_SPLIT(dev
)) {
818 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
820 if (dev_priv
->edp_support
) {
821 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
827 intel_lvds
= kzalloc(sizeof(struct intel_lvds
), GFP_KERNEL
);
832 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
833 if (!intel_connector
) {
838 intel_encoder
= &intel_lvds
->base
;
839 encoder
= &intel_encoder
->base
;
840 connector
= &intel_connector
->base
;
841 drm_connector_init(dev
, &intel_connector
->base
, &intel_lvds_connector_funcs
,
842 DRM_MODE_CONNECTOR_LVDS
);
844 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_lvds_enc_funcs
,
845 DRM_MODE_ENCODER_LVDS
);
847 intel_connector_attach_encoder(intel_connector
, intel_encoder
);
848 intel_encoder
->type
= INTEL_OUTPUT_LVDS
;
850 intel_encoder
->clone_mask
= (1 << INTEL_LVDS_CLONE_BIT
);
851 intel_encoder
->crtc_mask
= (1 << 1);
852 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
853 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
854 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
855 connector
->interlace_allowed
= false;
856 connector
->doublescan_allowed
= false;
858 /* create the scaling mode property */
859 drm_mode_create_scaling_mode_property(dev
);
861 * the initial panel fitting mode will be FULL_SCREEN.
864 drm_connector_attach_property(&intel_connector
->base
,
865 dev
->mode_config
.scaling_mode_property
,
866 DRM_MODE_SCALE_ASPECT
);
867 intel_lvds
->fitting_mode
= DRM_MODE_SCALE_ASPECT
;
870 * 1) check for EDID on DDC
871 * 2) check for VBT data
872 * 3) check to see if LVDS is already on
873 * if none of the above, no panel
874 * 4) make sure lid is open
875 * if closed, act like it's not there for now
878 /* Set up the DDC bus. */
879 intel_encoder
->ddc_bus
= intel_i2c_create(dev
, gpio
, "LVDSDDC_C");
880 if (!intel_encoder
->ddc_bus
) {
881 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
887 * Attempt to get the fixed panel mode from DDC. Assume that the
888 * preferred mode is the right one.
890 dev_priv
->lvds_edid_good
= true;
892 if (!intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
))
893 dev_priv
->lvds_edid_good
= false;
895 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
896 mutex_lock(&dev
->mode_config
.mutex
);
897 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
898 dev_priv
->panel_fixed_mode
=
899 drm_mode_duplicate(dev
, scan
);
900 mutex_unlock(&dev
->mode_config
.mutex
);
901 intel_find_lvds_downclock(dev
, connector
);
904 mutex_unlock(&dev
->mode_config
.mutex
);
907 /* Failed to get EDID, what about VBT? */
908 if (dev_priv
->lfp_lvds_vbt_mode
) {
909 mutex_lock(&dev
->mode_config
.mutex
);
910 dev_priv
->panel_fixed_mode
=
911 drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
912 mutex_unlock(&dev
->mode_config
.mutex
);
913 if (dev_priv
->panel_fixed_mode
) {
914 dev_priv
->panel_fixed_mode
->type
|=
915 DRM_MODE_TYPE_PREFERRED
;
921 * If we didn't get EDID, try checking if the panel is already turned
922 * on. If so, assume that whatever is currently programmed is the
926 /* Ironlake: FIXME if still fail, not try pipe mode now */
927 if (HAS_PCH_SPLIT(dev
))
930 lvds
= I915_READ(LVDS
);
931 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
932 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
934 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
935 dev_priv
->panel_fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
936 if (dev_priv
->panel_fixed_mode
) {
937 dev_priv
->panel_fixed_mode
->type
|=
938 DRM_MODE_TYPE_PREFERRED
;
943 /* If we still don't have a mode after all that, give up. */
944 if (!dev_priv
->panel_fixed_mode
)
948 if (HAS_PCH_SPLIT(dev
)) {
950 /* make sure PWM is enabled */
951 pwm
= I915_READ(BLC_PWM_CPU_CTL2
);
952 pwm
|= (PWM_ENABLE
| PWM_PIPE_B
);
953 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
);
955 pwm
= I915_READ(BLC_PWM_PCH_CTL1
);
956 pwm
|= PWM_PCH_ENABLE
;
957 I915_WRITE(BLC_PWM_PCH_CTL1
, pwm
);
959 dev_priv
->lid_notifier
.notifier_call
= intel_lid_notify
;
960 if (acpi_lid_notifier_register(&dev_priv
->lid_notifier
)) {
961 DRM_DEBUG_KMS("lid notifier registration failed\n");
962 dev_priv
->lid_notifier
.notifier_call
= NULL
;
964 /* keep the LVDS connector */
965 dev_priv
->int_lvds_connector
= connector
;
966 drm_sysfs_connector_add(connector
);
970 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
971 if (intel_encoder
->ddc_bus
)
972 intel_i2c_destroy(intel_encoder
->ddc_bus
);
973 drm_connector_cleanup(connector
);
974 drm_encoder_cleanup(encoder
);
976 kfree(intel_connector
);