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
;
54 struct drm_display_mode
*fixed_mode
;
57 static struct intel_lvds
*to_intel_lvds(struct drm_encoder
*encoder
)
59 return container_of(encoder
, struct intel_lvds
, base
.base
);
62 static struct intel_lvds
*intel_attached_lvds(struct drm_connector
*connector
)
64 return container_of(intel_attached_encoder(connector
),
65 struct intel_lvds
, base
);
69 * Sets the power state for the panel.
71 static void intel_lvds_set_power(struct intel_lvds
*intel_lvds
, bool on
)
73 struct drm_device
*dev
= intel_lvds
->base
.base
.dev
;
74 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
75 u32 ctl_reg
, lvds_reg
;
77 if (HAS_PCH_SPLIT(dev
)) {
78 ctl_reg
= PCH_PP_CONTROL
;
86 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) | LVDS_PORT_EN
);
87 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) | POWER_TARGET_ON
);
88 intel_panel_set_backlight(dev
, dev_priv
->backlight_level
);
90 dev_priv
->backlight_level
= intel_panel_get_backlight(dev
);
92 intel_panel_set_backlight(dev
, 0);
93 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) & ~POWER_TARGET_ON
);
95 if (intel_lvds
->pfit_control
) {
96 if (wait_for((I915_READ(PP_STATUS
) & PP_ON
) == 0, 1000))
97 DRM_ERROR("timed out waiting for panel to power off\n");
98 I915_WRITE(PFIT_CONTROL
, 0);
99 intel_lvds
->pfit_control
= 0;
102 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) & ~LVDS_PORT_EN
);
104 POSTING_READ(lvds_reg
);
107 static void intel_lvds_dpms(struct drm_encoder
*encoder
, int mode
)
109 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
111 if (mode
== DRM_MODE_DPMS_ON
)
112 intel_lvds_set_power(intel_lvds
, true);
114 intel_lvds_set_power(intel_lvds
, 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 intel_lvds
*intel_lvds
= intel_attached_lvds(connector
);
123 struct drm_display_mode
*fixed_mode
= intel_lvds
->fixed_mode
;
125 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
127 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
134 centre_horizontally(struct drm_display_mode
*mode
,
137 u32 border
, sync_pos
, blank_width
, sync_width
;
139 /* keep the hsync and hblank widths constant */
140 sync_width
= mode
->crtc_hsync_end
- mode
->crtc_hsync_start
;
141 blank_width
= mode
->crtc_hblank_end
- mode
->crtc_hblank_start
;
142 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
144 border
= (mode
->hdisplay
- width
+ 1) / 2;
145 border
+= border
& 1; /* make the border even */
147 mode
->crtc_hdisplay
= width
;
148 mode
->crtc_hblank_start
= width
+ border
;
149 mode
->crtc_hblank_end
= mode
->crtc_hblank_start
+ blank_width
;
151 mode
->crtc_hsync_start
= mode
->crtc_hblank_start
+ sync_pos
;
152 mode
->crtc_hsync_end
= mode
->crtc_hsync_start
+ sync_width
;
156 centre_vertically(struct drm_display_mode
*mode
,
159 u32 border
, sync_pos
, blank_width
, sync_width
;
161 /* keep the vsync and vblank widths constant */
162 sync_width
= mode
->crtc_vsync_end
- mode
->crtc_vsync_start
;
163 blank_width
= mode
->crtc_vblank_end
- mode
->crtc_vblank_start
;
164 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
166 border
= (mode
->vdisplay
- height
+ 1) / 2;
168 mode
->crtc_vdisplay
= height
;
169 mode
->crtc_vblank_start
= height
+ border
;
170 mode
->crtc_vblank_end
= mode
->crtc_vblank_start
+ blank_width
;
172 mode
->crtc_vsync_start
= mode
->crtc_vblank_start
+ sync_pos
;
173 mode
->crtc_vsync_end
= mode
->crtc_vsync_start
+ sync_width
;
176 static inline u32
panel_fitter_scaling(u32 source
, u32 target
)
179 * Floating point operation is not supported. So the FACTOR
180 * is defined, which can avoid the floating point computation
181 * when calculating the panel ratio.
184 #define FACTOR (1 << ACCURACY)
185 u32 ratio
= source
* FACTOR
/ target
;
186 return (FACTOR
* ratio
+ FACTOR
/2) / FACTOR
;
189 static bool intel_lvds_mode_fixup(struct drm_encoder
*encoder
,
190 struct drm_display_mode
*mode
,
191 struct drm_display_mode
*adjusted_mode
)
193 struct drm_device
*dev
= encoder
->dev
;
194 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
195 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->crtc
);
196 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
197 struct drm_encoder
*tmp_encoder
;
198 u32 pfit_control
= 0, pfit_pgm_ratios
= 0, border
= 0;
200 /* Should never happen!! */
201 if (!IS_I965G(dev
) && intel_crtc
->pipe
== 0) {
202 DRM_ERROR("Can't support LVDS on pipe A\n");
206 /* Should never happen!! */
207 list_for_each_entry(tmp_encoder
, &dev
->mode_config
.encoder_list
, head
) {
208 if (tmp_encoder
!= encoder
&& tmp_encoder
->crtc
== encoder
->crtc
) {
209 DRM_ERROR("Can't enable LVDS and another "
210 "encoder on the same pipe\n");
216 * We have timings from the BIOS for the panel, put them in
217 * to the adjusted mode. The CRTC will be set up for this mode,
218 * with the panel scaling set up to source from the H/VDisplay
219 * of the original mode.
221 intel_fixed_panel_mode(intel_lvds
->fixed_mode
, adjusted_mode
);
223 if (HAS_PCH_SPLIT(dev
)) {
224 intel_pch_panel_fitting(dev
, intel_lvds
->fitting_mode
,
225 mode
, adjusted_mode
);
229 /* Make sure pre-965s set dither correctly */
230 if (!IS_I965G(dev
)) {
231 if (dev_priv
->panel_wants_dither
|| dev_priv
->lvds_dither
)
232 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
235 /* Native modes don't need fitting */
236 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
237 adjusted_mode
->vdisplay
== mode
->vdisplay
)
240 /* 965+ wants fuzzy fitting */
242 pfit_control
|= ((intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
246 * Enable automatic panel scaling for non-native modes so that they fill
247 * the screen. Should be enabled before the pipe is enabled, according
248 * to register description and PRM.
249 * Change the value here to see the borders for debugging
251 I915_WRITE(BCLRPAT_A
, 0);
252 I915_WRITE(BCLRPAT_B
, 0);
254 switch (intel_lvds
->fitting_mode
) {
255 case DRM_MODE_SCALE_CENTER
:
257 * For centered modes, we have to calculate border widths &
258 * heights and modify the values programmed into the CRTC.
260 centre_horizontally(adjusted_mode
, mode
->hdisplay
);
261 centre_vertically(adjusted_mode
, mode
->vdisplay
);
262 border
= LVDS_BORDER_ENABLE
;
265 case DRM_MODE_SCALE_ASPECT
:
266 /* Scale but preserve the aspect ratio */
268 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
269 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
271 pfit_control
|= PFIT_ENABLE
;
272 /* 965+ is easy, it does everything in hw */
273 if (scaled_width
> scaled_height
)
274 pfit_control
|= PFIT_SCALING_PILLAR
;
275 else if (scaled_width
< scaled_height
)
276 pfit_control
|= PFIT_SCALING_LETTER
;
278 pfit_control
|= PFIT_SCALING_AUTO
;
280 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
281 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
283 * For earlier chips we have to calculate the scaling
284 * ratio by hand and program it into the
285 * PFIT_PGM_RATIO register
287 if (scaled_width
> scaled_height
) { /* pillar */
288 centre_horizontally(adjusted_mode
, scaled_height
/ mode
->vdisplay
);
290 border
= LVDS_BORDER_ENABLE
;
291 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
) {
292 u32 bits
= panel_fitter_scaling(mode
->vdisplay
, adjusted_mode
->vdisplay
);
293 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
294 bits
<< PFIT_VERT_SCALE_SHIFT
);
295 pfit_control
|= (PFIT_ENABLE
|
296 VERT_INTERP_BILINEAR
|
297 HORIZ_INTERP_BILINEAR
);
299 } else if (scaled_width
< scaled_height
) { /* letter */
300 centre_vertically(adjusted_mode
, scaled_width
/ mode
->hdisplay
);
302 border
= LVDS_BORDER_ENABLE
;
303 if (mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
304 u32 bits
= panel_fitter_scaling(mode
->hdisplay
, adjusted_mode
->hdisplay
);
305 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
306 bits
<< PFIT_VERT_SCALE_SHIFT
);
307 pfit_control
|= (PFIT_ENABLE
|
308 VERT_INTERP_BILINEAR
|
309 HORIZ_INTERP_BILINEAR
);
312 /* Aspects match, Let hw scale both directions */
313 pfit_control
|= (PFIT_ENABLE
|
314 VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
315 VERT_INTERP_BILINEAR
|
316 HORIZ_INTERP_BILINEAR
);
320 case DRM_MODE_SCALE_FULLSCREEN
:
322 * Full scaling, even if it changes the aspect ratio.
323 * Fortunately this is all done for us in hw.
325 pfit_control
|= PFIT_ENABLE
;
327 pfit_control
|= PFIT_SCALING_AUTO
;
329 pfit_control
|= (VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
330 VERT_INTERP_BILINEAR
|
331 HORIZ_INTERP_BILINEAR
);
339 if (pfit_control
!= intel_lvds
->pfit_control
||
340 pfit_pgm_ratios
!= intel_lvds
->pfit_pgm_ratios
) {
341 intel_lvds
->pfit_control
= pfit_control
;
342 intel_lvds
->pfit_pgm_ratios
= pfit_pgm_ratios
;
343 intel_lvds
->pfit_dirty
= true;
345 dev_priv
->lvds_border_bits
= border
;
348 * XXX: It would be nice to support lower refresh rates on the
349 * panels to reduce power consumption, and perhaps match the
350 * user's requested refresh rate.
356 static void intel_lvds_prepare(struct drm_encoder
*encoder
)
358 struct drm_device
*dev
= encoder
->dev
;
359 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
360 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
362 dev_priv
->backlight_level
= intel_panel_get_backlight(dev
);
364 /* We try to do the minimum that is necessary in order to unlock
365 * the registers for mode setting.
367 * On Ironlake, this is quite simple as we just set the unlock key
368 * and ignore all subtleties. (This may cause some issues...)
370 * Prior to Ironlake, we must disable the pipe if we want to adjust
371 * the panel fitter. However at all other times we can just reset
372 * the registers regardless.
375 if (HAS_PCH_SPLIT(dev
)) {
376 I915_WRITE(PCH_PP_CONTROL
,
377 I915_READ(PCH_PP_CONTROL
) | PANEL_UNLOCK_REGS
);
378 } else if (intel_lvds
->pfit_dirty
) {
379 I915_WRITE(PP_CONTROL
,
380 I915_READ(PP_CONTROL
) & ~POWER_TARGET_ON
);
381 I915_WRITE(LVDS
, I915_READ(LVDS
) & ~LVDS_PORT_EN
);
383 I915_WRITE(PP_CONTROL
,
384 I915_READ(PP_CONTROL
) | PANEL_UNLOCK_REGS
);
388 static void intel_lvds_commit(struct drm_encoder
*encoder
)
390 struct drm_device
*dev
= encoder
->dev
;
391 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
392 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
394 if (dev_priv
->backlight_level
== 0)
395 dev_priv
->backlight_level
= intel_panel_get_max_backlight(dev
);
397 /* Undo any unlocking done in prepare to prevent accidental
398 * adjustment of the registers.
400 if (HAS_PCH_SPLIT(dev
)) {
401 u32 val
= I915_READ(PCH_PP_CONTROL
);
402 if ((val
& PANEL_UNLOCK_REGS
) == PANEL_UNLOCK_REGS
)
403 I915_WRITE(PCH_PP_CONTROL
, val
& 0x3);
405 u32 val
= I915_READ(PP_CONTROL
);
406 if ((val
& PANEL_UNLOCK_REGS
) == PANEL_UNLOCK_REGS
)
407 I915_WRITE(PP_CONTROL
, val
& 0x3);
410 /* Always do a full power on as we do not know what state
413 intel_lvds_set_power(intel_lvds
, true);
416 static void intel_lvds_mode_set(struct drm_encoder
*encoder
,
417 struct drm_display_mode
*mode
,
418 struct drm_display_mode
*adjusted_mode
)
420 struct drm_device
*dev
= encoder
->dev
;
421 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
422 struct intel_lvds
*intel_lvds
= to_intel_lvds(encoder
);
425 * The LVDS pin pair will already have been turned on in the
426 * intel_crtc_mode_set since it has a large impact on the DPLL
430 if (HAS_PCH_SPLIT(dev
))
433 if (!intel_lvds
->pfit_dirty
)
437 * Enable automatic panel scaling so that non-native modes fill the
438 * screen. Should be enabled before the pipe is enabled, according to
439 * register description and PRM.
441 if (wait_for((I915_READ(PP_STATUS
) & PP_ON
) == 0, 1000))
442 DRM_ERROR("timed out waiting for panel to power off\n");
444 I915_WRITE(PFIT_PGM_RATIOS
, intel_lvds
->pfit_pgm_ratios
);
445 I915_WRITE(PFIT_CONTROL
, intel_lvds
->pfit_control
);
446 intel_lvds
->pfit_dirty
= false;
450 * Detect the LVDS connection.
452 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
453 * connected and closed means disconnected. We also send hotplug events as
454 * needed, using lid status notification from the input layer.
456 static enum drm_connector_status
intel_lvds_detect(struct drm_connector
*connector
)
458 struct drm_device
*dev
= connector
->dev
;
459 enum drm_connector_status status
= connector_status_connected
;
461 /* ACPI lid methods were generally unreliable in this generation, so
464 if (IS_GEN2(dev
) || IS_GEN3(dev
))
465 return connector_status_connected
;
471 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
473 static int intel_lvds_get_modes(struct drm_connector
*connector
)
475 struct intel_lvds
*intel_lvds
= intel_attached_lvds(connector
);
476 struct drm_device
*dev
= connector
->dev
;
477 struct drm_display_mode
*mode
;
479 if (intel_lvds
->edid_good
) {
480 int ret
= intel_ddc_get_modes(connector
,
481 intel_lvds
->base
.ddc_bus
);
486 mode
= drm_mode_duplicate(dev
, intel_lvds
->fixed_mode
);
490 drm_mode_probed_add(connector
, mode
);
494 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id
*id
)
496 DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id
->ident
);
500 /* The GPU hangs up on these systems if modeset is performed on LID open */
501 static const struct dmi_system_id intel_no_modeset_on_lid
[] = {
503 .callback
= intel_no_modeset_on_lid_dmi_callback
,
504 .ident
= "Toshiba Tecra A11",
506 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
507 DMI_MATCH(DMI_PRODUCT_NAME
, "TECRA A11"),
511 { } /* terminating entry */
515 * Lid events. Note the use of 'modeset_on_lid':
516 * - we set it on lid close, and reset it on open
517 * - we use it as a "only once" bit (ie we ignore
518 * duplicate events where it was already properly
520 * - the suspend/resume paths will also set it to
521 * zero, since they restore the mode ("lid open").
523 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
526 struct drm_i915_private
*dev_priv
=
527 container_of(nb
, struct drm_i915_private
, lid_notifier
);
528 struct drm_device
*dev
= dev_priv
->dev
;
529 struct drm_connector
*connector
= dev_priv
->int_lvds_connector
;
532 * check and update the status of LVDS connector after receiving
533 * the LID nofication event.
536 connector
->status
= connector
->funcs
->detect(connector
);
537 /* Don't force modeset on machines where it causes a GPU lockup */
538 if (dmi_check_system(intel_no_modeset_on_lid
))
540 if (!acpi_lid_open()) {
541 dev_priv
->modeset_on_lid
= 1;
545 if (!dev_priv
->modeset_on_lid
)
548 dev_priv
->modeset_on_lid
= 0;
550 mutex_lock(&dev
->mode_config
.mutex
);
551 drm_helper_resume_force_mode(dev
);
552 mutex_unlock(&dev
->mode_config
.mutex
);
558 * intel_lvds_destroy - unregister and free LVDS structures
559 * @connector: connector to free
561 * Unregister the DDC bus for this connector then free the driver private
564 static void intel_lvds_destroy(struct drm_connector
*connector
)
566 struct drm_device
*dev
= connector
->dev
;
567 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
569 if (dev_priv
->lid_notifier
.notifier_call
)
570 acpi_lid_notifier_unregister(&dev_priv
->lid_notifier
);
571 drm_sysfs_connector_remove(connector
);
572 drm_connector_cleanup(connector
);
576 static int intel_lvds_set_property(struct drm_connector
*connector
,
577 struct drm_property
*property
,
580 struct intel_lvds
*intel_lvds
= intel_attached_lvds(connector
);
581 struct drm_device
*dev
= connector
->dev
;
583 if (property
== dev
->mode_config
.scaling_mode_property
) {
584 struct drm_crtc
*crtc
= intel_lvds
->base
.base
.crtc
;
586 if (value
== DRM_MODE_SCALE_NONE
) {
587 DRM_DEBUG_KMS("no scaling not supported\n");
591 if (intel_lvds
->fitting_mode
== value
) {
592 /* the LVDS scaling property is not changed */
595 intel_lvds
->fitting_mode
= value
;
596 if (crtc
&& crtc
->enabled
) {
598 * If the CRTC is enabled, the display will be changed
599 * according to the new panel fitting mode.
601 drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
602 crtc
->x
, crtc
->y
, crtc
->fb
);
609 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
610 .dpms
= intel_lvds_dpms
,
611 .mode_fixup
= intel_lvds_mode_fixup
,
612 .prepare
= intel_lvds_prepare
,
613 .mode_set
= intel_lvds_mode_set
,
614 .commit
= intel_lvds_commit
,
617 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
618 .get_modes
= intel_lvds_get_modes
,
619 .mode_valid
= intel_lvds_mode_valid
,
620 .best_encoder
= intel_best_encoder
,
623 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
624 .dpms
= drm_helper_connector_dpms
,
625 .detect
= intel_lvds_detect
,
626 .fill_modes
= drm_helper_probe_single_connector_modes
,
627 .set_property
= intel_lvds_set_property
,
628 .destroy
= intel_lvds_destroy
,
631 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
632 .destroy
= intel_encoder_destroy
,
635 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
637 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id
->ident
);
641 /* These systems claim to have LVDS, but really don't */
642 static const struct dmi_system_id intel_no_lvds
[] = {
644 .callback
= intel_no_lvds_dmi_callback
,
645 .ident
= "Apple Mac Mini (Core series)",
647 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
648 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
652 .callback
= intel_no_lvds_dmi_callback
,
653 .ident
= "Apple Mac Mini (Core 2 series)",
655 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
656 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
660 .callback
= intel_no_lvds_dmi_callback
,
661 .ident
= "MSI IM-945GSE-A",
663 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
664 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
668 .callback
= intel_no_lvds_dmi_callback
,
669 .ident
= "Dell Studio Hybrid",
671 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
672 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
676 .callback
= intel_no_lvds_dmi_callback
,
677 .ident
= "AOpen Mini PC",
679 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
680 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
684 .callback
= intel_no_lvds_dmi_callback
,
685 .ident
= "AOpen Mini PC MP915",
687 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
688 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
692 .callback
= intel_no_lvds_dmi_callback
,
693 .ident
= "Aopen i945GTt-VFA",
695 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
699 .callback
= intel_no_lvds_dmi_callback
,
700 .ident
= "Clientron U800",
702 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
703 DMI_MATCH(DMI_PRODUCT_NAME
, "U800"),
707 { } /* terminating entry */
711 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
713 * @connector: LVDS connector
715 * Find the reduced downclock for LVDS in EDID.
717 static void intel_find_lvds_downclock(struct drm_device
*dev
,
718 struct drm_display_mode
*fixed_mode
,
719 struct drm_connector
*connector
)
721 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
722 struct drm_display_mode
*scan
;
725 temp_downclock
= fixed_mode
->clock
;
726 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
728 * If one mode has the same resolution with the fixed_panel
729 * mode while they have the different refresh rate, it means
730 * that the reduced downclock is found for the LVDS. In such
731 * case we can set the different FPx0/1 to dynamically select
732 * between low and high frequency.
734 if (scan
->hdisplay
== fixed_mode
->hdisplay
&&
735 scan
->hsync_start
== fixed_mode
->hsync_start
&&
736 scan
->hsync_end
== fixed_mode
->hsync_end
&&
737 scan
->htotal
== fixed_mode
->htotal
&&
738 scan
->vdisplay
== fixed_mode
->vdisplay
&&
739 scan
->vsync_start
== fixed_mode
->vsync_start
&&
740 scan
->vsync_end
== fixed_mode
->vsync_end
&&
741 scan
->vtotal
== fixed_mode
->vtotal
) {
742 if (scan
->clock
< temp_downclock
) {
744 * The downclock is already found. But we
745 * expect to find the lower downclock.
747 temp_downclock
= scan
->clock
;
751 if (temp_downclock
< fixed_mode
->clock
&& i915_lvds_downclock
) {
752 /* We found the downclock for LVDS. */
753 dev_priv
->lvds_downclock_avail
= 1;
754 dev_priv
->lvds_downclock
= temp_downclock
;
755 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
756 "Normal clock %dKhz, downclock %dKhz\n",
757 fixed_mode
->clock
, temp_downclock
);
762 * Enumerate the child dev array parsed from VBT to check whether
763 * the LVDS is present.
764 * If it is present, return 1.
765 * If it is not present, return false.
766 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
768 static bool lvds_is_present_in_vbt(struct drm_device
*dev
)
770 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
773 if (!dev_priv
->child_dev_num
)
776 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
777 struct child_device_config
*child
= dev_priv
->child_dev
+ i
;
779 /* If the device type is not LFP, continue.
780 * We have to check both the new identifiers as well as the
781 * old for compatibility with some BIOSes.
783 if (child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
784 child
->device_type
!= DEVICE_TYPE_LFP
)
787 /* However, we cannot trust the BIOS writers to populate
788 * the VBT correctly. Since LVDS requires additional
789 * information from AIM blocks, a non-zero addin offset is
790 * a good indicator that the LVDS is actually present.
792 if (child
->addin_offset
)
795 /* But even then some BIOS writers perform some black magic
796 * and instantiate the device without reference to any
797 * additional data. Trust that if the VBT was written into
798 * the OpRegion then they have validated the LVDS's existence.
800 if (dev_priv
->opregion
.vbt
)
808 * intel_lvds_init - setup LVDS connectors on this device
811 * Create the connector, register the LVDS DDC bus, and try to figure out what
812 * modes we can display on the LVDS panel (if present).
814 void intel_lvds_init(struct drm_device
*dev
)
816 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
817 struct intel_lvds
*intel_lvds
;
818 struct intel_encoder
*intel_encoder
;
819 struct intel_connector
*intel_connector
;
820 struct drm_connector
*connector
;
821 struct drm_encoder
*encoder
;
822 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
823 struct drm_crtc
*crtc
;
825 int pipe
, gpio
= GPIOC
;
827 /* Skip init on machines we know falsely report LVDS */
828 if (dmi_check_system(intel_no_lvds
))
831 if (!lvds_is_present_in_vbt(dev
)) {
832 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
836 if (HAS_PCH_SPLIT(dev
)) {
837 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
839 if (dev_priv
->edp_support
) {
840 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
846 intel_lvds
= kzalloc(sizeof(struct intel_lvds
), GFP_KERNEL
);
851 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
852 if (!intel_connector
) {
857 if (!HAS_PCH_SPLIT(dev
)) {
858 intel_lvds
->pfit_control
= I915_READ(PFIT_CONTROL
);
861 intel_encoder
= &intel_lvds
->base
;
862 encoder
= &intel_encoder
->base
;
863 connector
= &intel_connector
->base
;
864 drm_connector_init(dev
, &intel_connector
->base
, &intel_lvds_connector_funcs
,
865 DRM_MODE_CONNECTOR_LVDS
);
867 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_lvds_enc_funcs
,
868 DRM_MODE_ENCODER_LVDS
);
870 intel_connector_attach_encoder(intel_connector
, intel_encoder
);
871 intel_encoder
->type
= INTEL_OUTPUT_LVDS
;
873 intel_encoder
->clone_mask
= (1 << INTEL_LVDS_CLONE_BIT
);
874 intel_encoder
->crtc_mask
= (1 << 1);
875 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
876 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
877 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
878 connector
->interlace_allowed
= false;
879 connector
->doublescan_allowed
= false;
881 /* create the scaling mode property */
882 drm_mode_create_scaling_mode_property(dev
);
884 * the initial panel fitting mode will be FULL_SCREEN.
887 drm_connector_attach_property(&intel_connector
->base
,
888 dev
->mode_config
.scaling_mode_property
,
889 DRM_MODE_SCALE_ASPECT
);
890 intel_lvds
->fitting_mode
= DRM_MODE_SCALE_ASPECT
;
893 * 1) check for EDID on DDC
894 * 2) check for VBT data
895 * 3) check to see if LVDS is already on
896 * if none of the above, no panel
897 * 4) make sure lid is open
898 * if closed, act like it's not there for now
901 /* Set up the DDC bus. */
902 intel_encoder
->ddc_bus
= intel_i2c_create(dev
, gpio
, "LVDSDDC_C");
903 if (!intel_encoder
->ddc_bus
) {
904 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
910 * Attempt to get the fixed panel mode from DDC. Assume that the
911 * preferred mode is the right one.
913 intel_lvds
->edid_good
= true;
914 if (!intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
))
915 intel_lvds
->edid_good
= false;
917 if (!intel_lvds
->edid_good
) {
918 /* Didn't get an EDID, so
919 * Set wide sync ranges so we get all modes
920 * handed to valid_mode for checking
922 connector
->display_info
.min_vfreq
= 0;
923 connector
->display_info
.max_vfreq
= 200;
924 connector
->display_info
.min_hfreq
= 0;
925 connector
->display_info
.max_hfreq
= 200;
928 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
929 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
930 intel_lvds
->fixed_mode
=
931 drm_mode_duplicate(dev
, scan
);
932 intel_find_lvds_downclock(dev
,
933 intel_lvds
->fixed_mode
,
939 /* Failed to get EDID, what about VBT? */
940 if (dev_priv
->lfp_lvds_vbt_mode
) {
941 intel_lvds
->fixed_mode
=
942 drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
943 if (intel_lvds
->fixed_mode
) {
944 intel_lvds
->fixed_mode
->type
|=
945 DRM_MODE_TYPE_PREFERRED
;
951 * If we didn't get EDID, try checking if the panel is already turned
952 * on. If so, assume that whatever is currently programmed is the
956 /* Ironlake: FIXME if still fail, not try pipe mode now */
957 if (HAS_PCH_SPLIT(dev
))
960 lvds
= I915_READ(LVDS
);
961 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
962 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
964 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
965 intel_lvds
->fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
966 if (intel_lvds
->fixed_mode
) {
967 intel_lvds
->fixed_mode
->type
|=
968 DRM_MODE_TYPE_PREFERRED
;
973 /* If we still don't have a mode after all that, give up. */
974 if (!intel_lvds
->fixed_mode
)
978 if (HAS_PCH_SPLIT(dev
)) {
980 /* make sure PWM is enabled */
981 pwm
= I915_READ(BLC_PWM_CPU_CTL2
);
982 pwm
|= (PWM_ENABLE
| PWM_PIPE_B
);
983 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
);
985 pwm
= I915_READ(BLC_PWM_PCH_CTL1
);
986 pwm
|= PWM_PCH_ENABLE
;
987 I915_WRITE(BLC_PWM_PCH_CTL1
, pwm
);
989 dev_priv
->lid_notifier
.notifier_call
= intel_lid_notify
;
990 if (acpi_lid_notifier_register(&dev_priv
->lid_notifier
)) {
991 DRM_DEBUG_KMS("lid notifier registration failed\n");
992 dev_priv
->lid_notifier
.notifier_call
= NULL
;
994 /* keep the LVDS connector */
995 dev_priv
->int_lvds_connector
= connector
;
996 drm_sysfs_connector_add(connector
);
1000 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1001 if (intel_encoder
->ddc_bus
)
1002 intel_i2c_destroy(intel_encoder
->ddc_bus
);
1003 drm_connector_cleanup(connector
);
1004 drm_encoder_cleanup(encoder
);
1006 kfree(intel_connector
);