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
intel_lvds_detect(struct drm_connector
*connector
)
450 struct drm_device
*dev
= connector
->dev
;
451 enum drm_connector_status status
= connector_status_connected
;
453 /* ACPI lid methods were generally unreliable in this generation, so
456 if (IS_GEN2(dev
) || IS_GEN3(dev
))
457 return connector_status_connected
;
463 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
465 static int intel_lvds_get_modes(struct drm_connector
*connector
)
467 struct drm_device
*dev
= connector
->dev
;
468 struct drm_encoder
*encoder
= intel_attached_encoder(connector
);
469 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
470 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
473 if (dev_priv
->lvds_edid_good
) {
474 ret
= intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
);
480 /* Didn't get an EDID, so
481 * Set wide sync ranges so we get all modes
482 * handed to valid_mode for checking
484 connector
->display_info
.min_vfreq
= 0;
485 connector
->display_info
.max_vfreq
= 200;
486 connector
->display_info
.min_hfreq
= 0;
487 connector
->display_info
.max_hfreq
= 200;
489 if (dev_priv
->panel_fixed_mode
!= NULL
) {
490 struct drm_display_mode
*mode
;
492 mode
= drm_mode_duplicate(dev
, dev_priv
->panel_fixed_mode
);
493 drm_mode_probed_add(connector
, mode
);
501 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id
*id
)
503 DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id
->ident
);
507 /* The GPU hangs up on these systems if modeset is performed on LID open */
508 static const struct dmi_system_id intel_no_modeset_on_lid
[] = {
510 .callback
= intel_no_modeset_on_lid_dmi_callback
,
511 .ident
= "Toshiba Tecra A11",
513 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
514 DMI_MATCH(DMI_PRODUCT_NAME
, "TECRA A11"),
518 { } /* terminating entry */
522 * Lid events. Note the use of 'modeset_on_lid':
523 * - we set it on lid close, and reset it on open
524 * - we use it as a "only once" bit (ie we ignore
525 * duplicate events where it was already properly
527 * - the suspend/resume paths will also set it to
528 * zero, since they restore the mode ("lid open").
530 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
533 struct drm_i915_private
*dev_priv
=
534 container_of(nb
, struct drm_i915_private
, lid_notifier
);
535 struct drm_device
*dev
= dev_priv
->dev
;
536 struct drm_connector
*connector
= dev_priv
->int_lvds_connector
;
539 * check and update the status of LVDS connector after receiving
540 * the LID nofication event.
543 connector
->status
= connector
->funcs
->detect(connector
);
544 /* Don't force modeset on machines where it causes a GPU lockup */
545 if (dmi_check_system(intel_no_modeset_on_lid
))
547 if (!acpi_lid_open()) {
548 dev_priv
->modeset_on_lid
= 1;
552 if (!dev_priv
->modeset_on_lid
)
555 dev_priv
->modeset_on_lid
= 0;
557 mutex_lock(&dev
->mode_config
.mutex
);
558 drm_helper_resume_force_mode(dev
);
559 mutex_unlock(&dev
->mode_config
.mutex
);
565 * intel_lvds_destroy - unregister and free LVDS structures
566 * @connector: connector to free
568 * Unregister the DDC bus for this connector then free the driver private
571 static void intel_lvds_destroy(struct drm_connector
*connector
)
573 struct drm_device
*dev
= connector
->dev
;
574 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
576 if (dev_priv
->lid_notifier
.notifier_call
)
577 acpi_lid_notifier_unregister(&dev_priv
->lid_notifier
);
578 drm_sysfs_connector_remove(connector
);
579 drm_connector_cleanup(connector
);
583 static int intel_lvds_set_property(struct drm_connector
*connector
,
584 struct drm_property
*property
,
587 struct drm_device
*dev
= connector
->dev
;
589 if (property
== dev
->mode_config
.scaling_mode_property
&&
590 connector
->encoder
) {
591 struct drm_crtc
*crtc
= connector
->encoder
->crtc
;
592 struct drm_encoder
*encoder
= connector
->encoder
;
593 struct intel_lvds
*intel_lvds
= enc_to_intel_lvds(encoder
);
595 if (value
== DRM_MODE_SCALE_NONE
) {
596 DRM_DEBUG_KMS("no scaling not supported\n");
599 if (intel_lvds
->fitting_mode
== value
) {
600 /* the LVDS scaling property is not changed */
603 intel_lvds
->fitting_mode
= value
;
604 if (crtc
&& crtc
->enabled
) {
606 * If the CRTC is enabled, the display will be changed
607 * according to the new panel fitting mode.
609 drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
610 crtc
->x
, crtc
->y
, crtc
->fb
);
617 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
618 .dpms
= intel_lvds_dpms
,
619 .mode_fixup
= intel_lvds_mode_fixup
,
620 .prepare
= intel_lvds_prepare
,
621 .mode_set
= intel_lvds_mode_set
,
622 .commit
= intel_lvds_commit
,
625 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
626 .get_modes
= intel_lvds_get_modes
,
627 .mode_valid
= intel_lvds_mode_valid
,
628 .best_encoder
= intel_attached_encoder
,
631 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
632 .dpms
= drm_helper_connector_dpms
,
633 .detect
= intel_lvds_detect
,
634 .fill_modes
= drm_helper_probe_single_connector_modes
,
635 .set_property
= intel_lvds_set_property
,
636 .destroy
= intel_lvds_destroy
,
639 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
640 .destroy
= intel_encoder_destroy
,
643 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
645 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id
->ident
);
649 /* These systems claim to have LVDS, but really don't */
650 static const struct dmi_system_id intel_no_lvds
[] = {
652 .callback
= intel_no_lvds_dmi_callback
,
653 .ident
= "Apple Mac Mini (Core series)",
655 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
656 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
660 .callback
= intel_no_lvds_dmi_callback
,
661 .ident
= "Apple Mac Mini (Core 2 series)",
663 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
664 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
668 .callback
= intel_no_lvds_dmi_callback
,
669 .ident
= "MSI IM-945GSE-A",
671 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
672 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
676 .callback
= intel_no_lvds_dmi_callback
,
677 .ident
= "Dell Studio Hybrid",
679 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
680 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
684 .callback
= intel_no_lvds_dmi_callback
,
685 .ident
= "AOpen Mini PC",
687 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
688 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
692 .callback
= intel_no_lvds_dmi_callback
,
693 .ident
= "AOpen Mini PC MP915",
695 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
696 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
700 .callback
= intel_no_lvds_dmi_callback
,
701 .ident
= "Aopen i945GTt-VFA",
703 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
707 .callback
= intel_no_lvds_dmi_callback
,
708 .ident
= "Clientron U800",
710 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
711 DMI_MATCH(DMI_PRODUCT_NAME
, "U800"),
715 { } /* terminating entry */
719 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
721 * @connector: LVDS connector
723 * Find the reduced downclock for LVDS in EDID.
725 static void intel_find_lvds_downclock(struct drm_device
*dev
,
726 struct drm_connector
*connector
)
728 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
729 struct drm_display_mode
*scan
, *panel_fixed_mode
;
732 panel_fixed_mode
= dev_priv
->panel_fixed_mode
;
733 temp_downclock
= panel_fixed_mode
->clock
;
735 mutex_lock(&dev
->mode_config
.mutex
);
736 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
738 * If one mode has the same resolution with the fixed_panel
739 * mode while they have the different refresh rate, it means
740 * that the reduced downclock is found for the LVDS. In such
741 * case we can set the different FPx0/1 to dynamically select
742 * between low and high frequency.
744 if (scan
->hdisplay
== panel_fixed_mode
->hdisplay
&&
745 scan
->hsync_start
== panel_fixed_mode
->hsync_start
&&
746 scan
->hsync_end
== panel_fixed_mode
->hsync_end
&&
747 scan
->htotal
== panel_fixed_mode
->htotal
&&
748 scan
->vdisplay
== panel_fixed_mode
->vdisplay
&&
749 scan
->vsync_start
== panel_fixed_mode
->vsync_start
&&
750 scan
->vsync_end
== panel_fixed_mode
->vsync_end
&&
751 scan
->vtotal
== panel_fixed_mode
->vtotal
) {
752 if (scan
->clock
< temp_downclock
) {
754 * The downclock is already found. But we
755 * expect to find the lower downclock.
757 temp_downclock
= scan
->clock
;
761 mutex_unlock(&dev
->mode_config
.mutex
);
762 if (temp_downclock
< panel_fixed_mode
->clock
&&
763 i915_lvds_downclock
) {
764 /* We found the downclock for LVDS. */
765 dev_priv
->lvds_downclock_avail
= 1;
766 dev_priv
->lvds_downclock
= temp_downclock
;
767 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
768 "Normal clock %dKhz, downclock %dKhz\n",
769 panel_fixed_mode
->clock
, temp_downclock
);
775 * Enumerate the child dev array parsed from VBT to check whether
776 * the LVDS is present.
777 * If it is present, return 1.
778 * If it is not present, return false.
779 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
780 * Note: The addin_offset should also be checked for LVDS panel.
781 * Only when it is non-zero, it is assumed that it is present.
783 static int lvds_is_present_in_vbt(struct drm_device
*dev
)
785 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
786 struct child_device_config
*p_child
;
789 if (!dev_priv
->child_dev_num
)
793 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
794 p_child
= dev_priv
->child_dev
+ i
;
796 * If the device type is not LFP, continue.
797 * If the device type is 0x22, it is also regarded as LFP.
799 if (p_child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
800 p_child
->device_type
!= DEVICE_TYPE_LFP
)
803 /* The addin_offset should be checked. Only when it is
804 * non-zero, it is regarded as present.
806 if (p_child
->addin_offset
) {
815 * intel_lvds_init - setup LVDS connectors on this device
818 * Create the connector, register the LVDS DDC bus, and try to figure out what
819 * modes we can display on the LVDS panel (if present).
821 void intel_lvds_init(struct drm_device
*dev
)
823 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
824 struct intel_lvds
*intel_lvds
;
825 struct intel_encoder
*intel_encoder
;
826 struct intel_connector
*intel_connector
;
827 struct drm_connector
*connector
;
828 struct drm_encoder
*encoder
;
829 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
830 struct drm_crtc
*crtc
;
832 int pipe
, gpio
= GPIOC
;
834 /* Skip init on machines we know falsely report LVDS */
835 if (dmi_check_system(intel_no_lvds
))
838 if (!lvds_is_present_in_vbt(dev
)) {
839 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
843 if (HAS_PCH_SPLIT(dev
)) {
844 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
846 if (dev_priv
->edp_support
) {
847 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
853 intel_lvds
= kzalloc(sizeof(struct intel_lvds
), GFP_KERNEL
);
858 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
859 if (!intel_connector
) {
864 intel_encoder
= &intel_lvds
->base
;
865 encoder
= &intel_encoder
->enc
;
866 connector
= &intel_connector
->base
;
867 drm_connector_init(dev
, &intel_connector
->base
, &intel_lvds_connector_funcs
,
868 DRM_MODE_CONNECTOR_LVDS
);
870 drm_encoder_init(dev
, &intel_encoder
->enc
, &intel_lvds_enc_funcs
,
871 DRM_MODE_ENCODER_LVDS
);
873 drm_mode_connector_attach_encoder(&intel_connector
->base
, &intel_encoder
->enc
);
874 intel_encoder
->type
= INTEL_OUTPUT_LVDS
;
876 intel_encoder
->clone_mask
= (1 << INTEL_LVDS_CLONE_BIT
);
877 intel_encoder
->crtc_mask
= (1 << 1);
878 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
879 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
880 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
881 connector
->interlace_allowed
= false;
882 connector
->doublescan_allowed
= false;
884 /* create the scaling mode property */
885 drm_mode_create_scaling_mode_property(dev
);
887 * the initial panel fitting mode will be FULL_SCREEN.
890 drm_connector_attach_property(&intel_connector
->base
,
891 dev
->mode_config
.scaling_mode_property
,
892 DRM_MODE_SCALE_ASPECT
);
893 intel_lvds
->fitting_mode
= DRM_MODE_SCALE_ASPECT
;
896 * 1) check for EDID on DDC
897 * 2) check for VBT data
898 * 3) check to see if LVDS is already on
899 * if none of the above, no panel
900 * 4) make sure lid is open
901 * if closed, act like it's not there for now
904 /* Set up the DDC bus. */
905 intel_encoder
->ddc_bus
= intel_i2c_create(dev
, gpio
, "LVDSDDC_C");
906 if (!intel_encoder
->ddc_bus
) {
907 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
913 * Attempt to get the fixed panel mode from DDC. Assume that the
914 * preferred mode is the right one.
916 dev_priv
->lvds_edid_good
= true;
918 if (!intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
))
919 dev_priv
->lvds_edid_good
= false;
921 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
922 mutex_lock(&dev
->mode_config
.mutex
);
923 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
924 dev_priv
->panel_fixed_mode
=
925 drm_mode_duplicate(dev
, scan
);
926 mutex_unlock(&dev
->mode_config
.mutex
);
927 intel_find_lvds_downclock(dev
, connector
);
930 mutex_unlock(&dev
->mode_config
.mutex
);
933 /* Failed to get EDID, what about VBT? */
934 if (dev_priv
->lfp_lvds_vbt_mode
) {
935 mutex_lock(&dev
->mode_config
.mutex
);
936 dev_priv
->panel_fixed_mode
=
937 drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
938 mutex_unlock(&dev
->mode_config
.mutex
);
939 if (dev_priv
->panel_fixed_mode
) {
940 dev_priv
->panel_fixed_mode
->type
|=
941 DRM_MODE_TYPE_PREFERRED
;
947 * If we didn't get EDID, try checking if the panel is already turned
948 * on. If so, assume that whatever is currently programmed is the
952 /* Ironlake: FIXME if still fail, not try pipe mode now */
953 if (HAS_PCH_SPLIT(dev
))
956 lvds
= I915_READ(LVDS
);
957 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
958 crtc
= intel_get_crtc_from_pipe(dev
, pipe
);
960 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
961 dev_priv
->panel_fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
962 if (dev_priv
->panel_fixed_mode
) {
963 dev_priv
->panel_fixed_mode
->type
|=
964 DRM_MODE_TYPE_PREFERRED
;
969 /* If we still don't have a mode after all that, give up. */
970 if (!dev_priv
->panel_fixed_mode
)
974 if (HAS_PCH_SPLIT(dev
)) {
976 /* make sure PWM is enabled */
977 pwm
= I915_READ(BLC_PWM_CPU_CTL2
);
978 pwm
|= (PWM_ENABLE
| PWM_PIPE_B
);
979 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
);
981 pwm
= I915_READ(BLC_PWM_PCH_CTL1
);
982 pwm
|= PWM_PCH_ENABLE
;
983 I915_WRITE(BLC_PWM_PCH_CTL1
, pwm
);
985 dev_priv
->lid_notifier
.notifier_call
= intel_lid_notify
;
986 if (acpi_lid_notifier_register(&dev_priv
->lid_notifier
)) {
987 DRM_DEBUG_KMS("lid notifier registration failed\n");
988 dev_priv
->lid_notifier
.notifier_call
= NULL
;
990 /* keep the LVDS connector */
991 dev_priv
->int_lvds_connector
= connector
;
992 drm_sysfs_connector_add(connector
);
996 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
997 if (intel_encoder
->ddc_bus
)
998 intel_i2c_destroy(intel_encoder
->ddc_bus
);
999 drm_connector_cleanup(connector
);
1000 drm_encoder_cleanup(encoder
);
1002 kfree(intel_connector
);