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 */
44 struct intel_lvds_priv
{
51 * Sets the backlight level.
53 * \param level backlight level, from 0 to intel_lvds_get_max_backlight().
55 static void intel_lvds_set_backlight(struct drm_device
*dev
, int level
)
57 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
60 if (HAS_PCH_SPLIT(dev
))
61 reg
= BLC_PWM_CPU_CTL
;
65 blc_pwm_ctl
= I915_READ(reg
) & ~BACKLIGHT_DUTY_CYCLE_MASK
;
66 I915_WRITE(reg
, (blc_pwm_ctl
|
67 (level
<< BACKLIGHT_DUTY_CYCLE_SHIFT
)));
71 * Returns the maximum level of the backlight duty cycle field.
73 static u32
intel_lvds_get_max_backlight(struct drm_device
*dev
)
75 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
78 if (HAS_PCH_SPLIT(dev
))
79 reg
= BLC_PWM_PCH_CTL2
;
83 return ((I915_READ(reg
) & BACKLIGHT_MODULATION_FREQ_MASK
) >>
84 BACKLIGHT_MODULATION_FREQ_SHIFT
) * 2;
88 * Sets the power state for the panel.
90 static void intel_lvds_set_power(struct drm_device
*dev
, bool on
)
92 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
93 u32 pp_status
, ctl_reg
, status_reg
, lvds_reg
;
95 if (HAS_PCH_SPLIT(dev
)) {
96 ctl_reg
= PCH_PP_CONTROL
;
97 status_reg
= PCH_PP_STATUS
;
100 ctl_reg
= PP_CONTROL
;
101 status_reg
= PP_STATUS
;
106 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) | LVDS_PORT_EN
);
107 POSTING_READ(lvds_reg
);
109 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) |
112 pp_status
= I915_READ(status_reg
);
113 } while ((pp_status
& PP_ON
) == 0);
115 intel_lvds_set_backlight(dev
, dev_priv
->backlight_duty_cycle
);
117 intel_lvds_set_backlight(dev
, 0);
119 I915_WRITE(ctl_reg
, I915_READ(ctl_reg
) &
122 pp_status
= I915_READ(status_reg
);
123 } while (pp_status
& PP_ON
);
125 I915_WRITE(lvds_reg
, I915_READ(lvds_reg
) & ~LVDS_PORT_EN
);
126 POSTING_READ(lvds_reg
);
130 static void intel_lvds_dpms(struct drm_encoder
*encoder
, int mode
)
132 struct drm_device
*dev
= encoder
->dev
;
134 if (mode
== DRM_MODE_DPMS_ON
)
135 intel_lvds_set_power(dev
, true);
137 intel_lvds_set_power(dev
, false);
139 /* XXX: We never power down the LVDS pairs. */
142 static int intel_lvds_mode_valid(struct drm_connector
*connector
,
143 struct drm_display_mode
*mode
)
145 struct drm_device
*dev
= connector
->dev
;
146 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
147 struct drm_display_mode
*fixed_mode
= dev_priv
->panel_fixed_mode
;
150 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
152 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
160 centre_horizontally(struct drm_display_mode
*mode
,
163 u32 border
, sync_pos
, blank_width
, sync_width
;
165 /* keep the hsync and hblank widths constant */
166 sync_width
= mode
->crtc_hsync_end
- mode
->crtc_hsync_start
;
167 blank_width
= mode
->crtc_hblank_end
- mode
->crtc_hblank_start
;
168 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
170 border
= (mode
->hdisplay
- width
+ 1) / 2;
171 border
+= border
& 1; /* make the border even */
173 mode
->crtc_hdisplay
= width
;
174 mode
->crtc_hblank_start
= width
+ border
;
175 mode
->crtc_hblank_end
= mode
->crtc_hblank_start
+ blank_width
;
177 mode
->crtc_hsync_start
= mode
->crtc_hblank_start
+ sync_pos
;
178 mode
->crtc_hsync_end
= mode
->crtc_hsync_start
+ sync_width
;
182 centre_vertically(struct drm_display_mode
*mode
,
185 u32 border
, sync_pos
, blank_width
, sync_width
;
187 /* keep the vsync and vblank widths constant */
188 sync_width
= mode
->crtc_vsync_end
- mode
->crtc_vsync_start
;
189 blank_width
= mode
->crtc_vblank_end
- mode
->crtc_vblank_start
;
190 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
192 border
= (mode
->vdisplay
- height
+ 1) / 2;
194 mode
->crtc_vdisplay
= height
;
195 mode
->crtc_vblank_start
= height
+ border
;
196 mode
->crtc_vblank_end
= mode
->crtc_vblank_start
+ blank_width
;
198 mode
->crtc_vsync_start
= mode
->crtc_vblank_start
+ sync_pos
;
199 mode
->crtc_vsync_end
= mode
->crtc_vsync_start
+ sync_width
;
202 static inline u32
panel_fitter_scaling(u32 source
, u32 target
)
205 * Floating point operation is not supported. So the FACTOR
206 * is defined, which can avoid the floating point computation
207 * when calculating the panel ratio.
210 #define FACTOR (1 << ACCURACY)
211 u32 ratio
= source
* FACTOR
/ target
;
212 return (FACTOR
* ratio
+ FACTOR
/2) / FACTOR
;
215 static bool intel_lvds_mode_fixup(struct drm_encoder
*encoder
,
216 struct drm_display_mode
*mode
,
217 struct drm_display_mode
*adjusted_mode
)
219 struct drm_device
*dev
= encoder
->dev
;
220 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
221 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->crtc
);
222 struct drm_encoder
*tmp_encoder
;
223 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
224 struct intel_lvds_priv
*lvds_priv
= intel_encoder
->dev_priv
;
225 u32 pfit_control
= 0, pfit_pgm_ratios
= 0, border
= 0;
227 /* Should never happen!! */
228 if (!IS_I965G(dev
) && intel_crtc
->pipe
== 0) {
229 DRM_ERROR("Can't support LVDS on pipe A\n");
233 /* Should never happen!! */
234 list_for_each_entry(tmp_encoder
, &dev
->mode_config
.encoder_list
, head
) {
235 if (tmp_encoder
!= encoder
&& tmp_encoder
->crtc
== encoder
->crtc
) {
236 DRM_ERROR("Can't enable LVDS and another "
237 "encoder on the same pipe\n");
241 /* If we don't have a panel mode, there is nothing we can do */
242 if (dev_priv
->panel_fixed_mode
== NULL
)
245 * We have timings from the BIOS for the panel, put them in
246 * to the adjusted mode. The CRTC will be set up for this mode,
247 * with the panel scaling set up to source from the H/VDisplay
248 * of the original mode.
250 adjusted_mode
->hdisplay
= dev_priv
->panel_fixed_mode
->hdisplay
;
251 adjusted_mode
->hsync_start
=
252 dev_priv
->panel_fixed_mode
->hsync_start
;
253 adjusted_mode
->hsync_end
=
254 dev_priv
->panel_fixed_mode
->hsync_end
;
255 adjusted_mode
->htotal
= dev_priv
->panel_fixed_mode
->htotal
;
256 adjusted_mode
->vdisplay
= dev_priv
->panel_fixed_mode
->vdisplay
;
257 adjusted_mode
->vsync_start
=
258 dev_priv
->panel_fixed_mode
->vsync_start
;
259 adjusted_mode
->vsync_end
=
260 dev_priv
->panel_fixed_mode
->vsync_end
;
261 adjusted_mode
->vtotal
= dev_priv
->panel_fixed_mode
->vtotal
;
262 adjusted_mode
->clock
= dev_priv
->panel_fixed_mode
->clock
;
263 drm_mode_set_crtcinfo(adjusted_mode
, CRTC_INTERLACE_HALVE_V
);
265 /* Make sure pre-965s set dither correctly */
266 if (!IS_I965G(dev
)) {
267 if (dev_priv
->panel_wants_dither
|| dev_priv
->lvds_dither
)
268 pfit_control
|= PANEL_8TO6_DITHER_ENABLE
;
271 /* Native modes don't need fitting */
272 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
273 adjusted_mode
->vdisplay
== mode
->vdisplay
)
276 /* full screen scale for now */
277 if (HAS_PCH_SPLIT(dev
))
280 /* 965+ wants fuzzy fitting */
282 pfit_control
|= ((intel_crtc
->pipe
<< PFIT_PIPE_SHIFT
) |
286 * Enable automatic panel scaling for non-native modes so that they fill
287 * the screen. Should be enabled before the pipe is enabled, according
288 * to register description and PRM.
289 * Change the value here to see the borders for debugging
291 if (!HAS_PCH_SPLIT(dev
)) {
292 I915_WRITE(BCLRPAT_A
, 0);
293 I915_WRITE(BCLRPAT_B
, 0);
296 switch (lvds_priv
->fitting_mode
) {
297 case DRM_MODE_SCALE_CENTER
:
299 * For centered modes, we have to calculate border widths &
300 * heights and modify the values programmed into the CRTC.
302 centre_horizontally(adjusted_mode
, mode
->hdisplay
);
303 centre_vertically(adjusted_mode
, mode
->vdisplay
);
304 border
= LVDS_BORDER_ENABLE
;
307 case DRM_MODE_SCALE_ASPECT
:
308 /* Scale but preserve the aspect ratio */
310 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
311 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
313 pfit_control
|= PFIT_ENABLE
;
314 /* 965+ is easy, it does everything in hw */
315 if (scaled_width
> scaled_height
)
316 pfit_control
|= PFIT_SCALING_PILLAR
;
317 else if (scaled_width
< scaled_height
)
318 pfit_control
|= PFIT_SCALING_LETTER
;
320 pfit_control
|= PFIT_SCALING_AUTO
;
322 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
323 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
325 * For earlier chips we have to calculate the scaling
326 * ratio by hand and program it into the
327 * PFIT_PGM_RATIO register
329 if (scaled_width
> scaled_height
) { /* pillar */
330 centre_horizontally(adjusted_mode
, scaled_height
/ mode
->vdisplay
);
332 border
= LVDS_BORDER_ENABLE
;
333 if (mode
->vdisplay
!= adjusted_mode
->vdisplay
) {
334 u32 bits
= panel_fitter_scaling(mode
->vdisplay
, adjusted_mode
->vdisplay
);
335 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
336 bits
<< PFIT_VERT_SCALE_SHIFT
);
337 pfit_control
|= (PFIT_ENABLE
|
338 VERT_INTERP_BILINEAR
|
339 HORIZ_INTERP_BILINEAR
);
341 } else if (scaled_width
< scaled_height
) { /* letter */
342 centre_vertically(adjusted_mode
, scaled_width
/ mode
->hdisplay
);
344 border
= LVDS_BORDER_ENABLE
;
345 if (mode
->hdisplay
!= adjusted_mode
->hdisplay
) {
346 u32 bits
= panel_fitter_scaling(mode
->hdisplay
, adjusted_mode
->hdisplay
);
347 pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
348 bits
<< PFIT_VERT_SCALE_SHIFT
);
349 pfit_control
|= (PFIT_ENABLE
|
350 VERT_INTERP_BILINEAR
|
351 HORIZ_INTERP_BILINEAR
);
354 /* Aspects match, Let hw scale both directions */
355 pfit_control
|= (PFIT_ENABLE
|
356 VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
357 VERT_INTERP_BILINEAR
|
358 HORIZ_INTERP_BILINEAR
);
362 case DRM_MODE_SCALE_FULLSCREEN
:
364 * Full scaling, even if it changes the aspect ratio.
365 * Fortunately this is all done for us in hw.
367 pfit_control
|= PFIT_ENABLE
;
369 pfit_control
|= PFIT_SCALING_AUTO
;
371 pfit_control
|= (VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
372 VERT_INTERP_BILINEAR
|
373 HORIZ_INTERP_BILINEAR
);
381 lvds_priv
->pfit_control
= pfit_control
;
382 lvds_priv
->pfit_pgm_ratios
= pfit_pgm_ratios
;
383 dev_priv
->lvds_border_bits
= border
;
386 * XXX: It would be nice to support lower refresh rates on the
387 * panels to reduce power consumption, and perhaps match the
388 * user's requested refresh rate.
394 static void intel_lvds_prepare(struct drm_encoder
*encoder
)
396 struct drm_device
*dev
= encoder
->dev
;
397 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
400 if (HAS_PCH_SPLIT(dev
))
401 reg
= BLC_PWM_CPU_CTL
;
405 dev_priv
->saveBLC_PWM_CTL
= I915_READ(reg
);
406 dev_priv
->backlight_duty_cycle
= (dev_priv
->saveBLC_PWM_CTL
&
407 BACKLIGHT_DUTY_CYCLE_MASK
);
409 intel_lvds_set_power(dev
, false);
412 static void intel_lvds_commit( struct drm_encoder
*encoder
)
414 struct drm_device
*dev
= encoder
->dev
;
415 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
417 if (dev_priv
->backlight_duty_cycle
== 0)
418 dev_priv
->backlight_duty_cycle
=
419 intel_lvds_get_max_backlight(dev
);
421 intel_lvds_set_power(dev
, true);
424 static void intel_lvds_mode_set(struct drm_encoder
*encoder
,
425 struct drm_display_mode
*mode
,
426 struct drm_display_mode
*adjusted_mode
)
428 struct drm_device
*dev
= encoder
->dev
;
429 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
430 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
431 struct intel_lvds_priv
*lvds_priv
= intel_encoder
->dev_priv
;
434 * The LVDS pin pair will already have been turned on in the
435 * intel_crtc_mode_set since it has a large impact on the DPLL
439 if (HAS_PCH_SPLIT(dev
))
443 * Enable automatic panel scaling so that non-native modes fill the
444 * screen. Should be enabled before the pipe is enabled, according to
445 * register description and PRM.
447 I915_WRITE(PFIT_PGM_RATIOS
, lvds_priv
->pfit_pgm_ratios
);
448 I915_WRITE(PFIT_CONTROL
, lvds_priv
->pfit_control
);
452 * Detect the LVDS connection.
454 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
455 * connected and closed means disconnected. We also send hotplug events as
456 * needed, using lid status notification from the input layer.
458 static enum drm_connector_status
intel_lvds_detect(struct drm_connector
*connector
)
460 struct drm_device
*dev
= connector
->dev
;
461 enum drm_connector_status status
= connector_status_connected
;
463 /* ACPI lid methods were generally unreliable in this generation, so
466 if (IS_GEN2(dev
) || IS_GEN3(dev
))
467 return connector_status_connected
;
473 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
475 static int intel_lvds_get_modes(struct drm_connector
*connector
)
477 struct drm_device
*dev
= connector
->dev
;
478 struct drm_encoder
*encoder
= intel_attached_encoder(connector
);
479 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
480 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
483 if (dev_priv
->lvds_edid_good
) {
484 ret
= intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
);
490 /* Didn't get an EDID, so
491 * Set wide sync ranges so we get all modes
492 * handed to valid_mode for checking
494 connector
->display_info
.min_vfreq
= 0;
495 connector
->display_info
.max_vfreq
= 200;
496 connector
->display_info
.min_hfreq
= 0;
497 connector
->display_info
.max_hfreq
= 200;
499 if (dev_priv
->panel_fixed_mode
!= NULL
) {
500 struct drm_display_mode
*mode
;
502 mode
= drm_mode_duplicate(dev
, dev_priv
->panel_fixed_mode
);
503 drm_mode_probed_add(connector
, mode
);
511 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id
*id
)
513 DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id
->ident
);
517 /* The GPU hangs up on these systems if modeset is performed on LID open */
518 static const struct dmi_system_id intel_no_modeset_on_lid
[] = {
520 .callback
= intel_no_modeset_on_lid_dmi_callback
,
521 .ident
= "Toshiba Tecra A11",
523 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
524 DMI_MATCH(DMI_PRODUCT_NAME
, "TECRA A11"),
528 { } /* terminating entry */
532 * Lid events. Note the use of 'modeset_on_lid':
533 * - we set it on lid close, and reset it on open
534 * - we use it as a "only once" bit (ie we ignore
535 * duplicate events where it was already properly
537 * - the suspend/resume paths will also set it to
538 * zero, since they restore the mode ("lid open").
540 static int intel_lid_notify(struct notifier_block
*nb
, unsigned long val
,
543 struct drm_i915_private
*dev_priv
=
544 container_of(nb
, struct drm_i915_private
, lid_notifier
);
545 struct drm_device
*dev
= dev_priv
->dev
;
546 struct drm_connector
*connector
= dev_priv
->int_lvds_connector
;
549 * check and update the status of LVDS connector after receiving
550 * the LID nofication event.
553 connector
->status
= connector
->funcs
->detect(connector
);
554 /* Don't force modeset on machines where it causes a GPU lockup */
555 if (dmi_check_system(intel_no_modeset_on_lid
))
557 if (!acpi_lid_open()) {
558 dev_priv
->modeset_on_lid
= 1;
562 if (!dev_priv
->modeset_on_lid
)
565 dev_priv
->modeset_on_lid
= 0;
567 mutex_lock(&dev
->mode_config
.mutex
);
568 drm_helper_resume_force_mode(dev
);
569 mutex_unlock(&dev
->mode_config
.mutex
);
575 * intel_lvds_destroy - unregister and free LVDS structures
576 * @connector: connector to free
578 * Unregister the DDC bus for this connector then free the driver private
581 static void intel_lvds_destroy(struct drm_connector
*connector
)
583 struct drm_device
*dev
= connector
->dev
;
584 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
586 if (dev_priv
->lid_notifier
.notifier_call
)
587 acpi_lid_notifier_unregister(&dev_priv
->lid_notifier
);
588 drm_sysfs_connector_remove(connector
);
589 drm_connector_cleanup(connector
);
593 static int intel_lvds_set_property(struct drm_connector
*connector
,
594 struct drm_property
*property
,
597 struct drm_device
*dev
= connector
->dev
;
599 if (property
== dev
->mode_config
.scaling_mode_property
&&
600 connector
->encoder
) {
601 struct drm_crtc
*crtc
= connector
->encoder
->crtc
;
602 struct drm_encoder
*encoder
= connector
->encoder
;
603 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
604 struct intel_lvds_priv
*lvds_priv
= intel_encoder
->dev_priv
;
606 if (value
== DRM_MODE_SCALE_NONE
) {
607 DRM_DEBUG_KMS("no scaling not supported\n");
610 if (lvds_priv
->fitting_mode
== value
) {
611 /* the LVDS scaling property is not changed */
614 lvds_priv
->fitting_mode
= value
;
615 if (crtc
&& crtc
->enabled
) {
617 * If the CRTC is enabled, the display will be changed
618 * according to the new panel fitting mode.
620 drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
621 crtc
->x
, crtc
->y
, crtc
->fb
);
628 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs
= {
629 .dpms
= intel_lvds_dpms
,
630 .mode_fixup
= intel_lvds_mode_fixup
,
631 .prepare
= intel_lvds_prepare
,
632 .mode_set
= intel_lvds_mode_set
,
633 .commit
= intel_lvds_commit
,
636 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs
= {
637 .get_modes
= intel_lvds_get_modes
,
638 .mode_valid
= intel_lvds_mode_valid
,
639 .best_encoder
= intel_attached_encoder
,
642 static const struct drm_connector_funcs intel_lvds_connector_funcs
= {
643 .dpms
= drm_helper_connector_dpms
,
644 .detect
= intel_lvds_detect
,
645 .fill_modes
= drm_helper_probe_single_connector_modes
,
646 .set_property
= intel_lvds_set_property
,
647 .destroy
= intel_lvds_destroy
,
651 static void intel_lvds_enc_destroy(struct drm_encoder
*encoder
)
653 struct intel_encoder
*intel_encoder
= enc_to_intel_encoder(encoder
);
655 if (intel_encoder
->ddc_bus
)
656 intel_i2c_destroy(intel_encoder
->ddc_bus
);
657 drm_encoder_cleanup(encoder
);
658 kfree(intel_encoder
);
661 static const struct drm_encoder_funcs intel_lvds_enc_funcs
= {
662 .destroy
= intel_lvds_enc_destroy
,
665 static int __init
intel_no_lvds_dmi_callback(const struct dmi_system_id
*id
)
667 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id
->ident
);
671 /* These systems claim to have LVDS, but really don't */
672 static const struct dmi_system_id intel_no_lvds
[] = {
674 .callback
= intel_no_lvds_dmi_callback
,
675 .ident
= "Apple Mac Mini (Core series)",
677 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
678 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini1,1"),
682 .callback
= intel_no_lvds_dmi_callback
,
683 .ident
= "Apple Mac Mini (Core 2 series)",
685 DMI_MATCH(DMI_SYS_VENDOR
, "Apple"),
686 DMI_MATCH(DMI_PRODUCT_NAME
, "Macmini2,1"),
690 .callback
= intel_no_lvds_dmi_callback
,
691 .ident
= "MSI IM-945GSE-A",
693 DMI_MATCH(DMI_SYS_VENDOR
, "MSI"),
694 DMI_MATCH(DMI_PRODUCT_NAME
, "A9830IMS"),
698 .callback
= intel_no_lvds_dmi_callback
,
699 .ident
= "Dell Studio Hybrid",
701 DMI_MATCH(DMI_SYS_VENDOR
, "Dell Inc."),
702 DMI_MATCH(DMI_PRODUCT_NAME
, "Studio Hybrid 140g"),
706 .callback
= intel_no_lvds_dmi_callback
,
707 .ident
= "AOpen Mini PC",
709 DMI_MATCH(DMI_SYS_VENDOR
, "AOpen"),
710 DMI_MATCH(DMI_PRODUCT_NAME
, "i965GMx-IF"),
714 .callback
= intel_no_lvds_dmi_callback
,
715 .ident
= "AOpen Mini PC MP915",
717 DMI_MATCH(DMI_BOARD_VENDOR
, "AOpen"),
718 DMI_MATCH(DMI_BOARD_NAME
, "i915GMx-F"),
722 .callback
= intel_no_lvds_dmi_callback
,
723 .ident
= "Aopen i945GTt-VFA",
725 DMI_MATCH(DMI_PRODUCT_VERSION
, "AO00001JW"),
729 .callback
= intel_no_lvds_dmi_callback
,
730 .ident
= "Clientron U800",
732 DMI_MATCH(DMI_SYS_VENDOR
, "Clientron"),
733 DMI_MATCH(DMI_PRODUCT_NAME
, "U800"),
737 { } /* terminating entry */
741 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
743 * @connector: LVDS connector
745 * Find the reduced downclock for LVDS in EDID.
747 static void intel_find_lvds_downclock(struct drm_device
*dev
,
748 struct drm_connector
*connector
)
750 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
751 struct drm_display_mode
*scan
, *panel_fixed_mode
;
754 panel_fixed_mode
= dev_priv
->panel_fixed_mode
;
755 temp_downclock
= panel_fixed_mode
->clock
;
757 mutex_lock(&dev
->mode_config
.mutex
);
758 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
760 * If one mode has the same resolution with the fixed_panel
761 * mode while they have the different refresh rate, it means
762 * that the reduced downclock is found for the LVDS. In such
763 * case we can set the different FPx0/1 to dynamically select
764 * between low and high frequency.
766 if (scan
->hdisplay
== panel_fixed_mode
->hdisplay
&&
767 scan
->hsync_start
== panel_fixed_mode
->hsync_start
&&
768 scan
->hsync_end
== panel_fixed_mode
->hsync_end
&&
769 scan
->htotal
== panel_fixed_mode
->htotal
&&
770 scan
->vdisplay
== panel_fixed_mode
->vdisplay
&&
771 scan
->vsync_start
== panel_fixed_mode
->vsync_start
&&
772 scan
->vsync_end
== panel_fixed_mode
->vsync_end
&&
773 scan
->vtotal
== panel_fixed_mode
->vtotal
) {
774 if (scan
->clock
< temp_downclock
) {
776 * The downclock is already found. But we
777 * expect to find the lower downclock.
779 temp_downclock
= scan
->clock
;
783 mutex_unlock(&dev
->mode_config
.mutex
);
784 if (temp_downclock
< panel_fixed_mode
->clock
&&
785 i915_lvds_downclock
) {
786 /* We found the downclock for LVDS. */
787 dev_priv
->lvds_downclock_avail
= 1;
788 dev_priv
->lvds_downclock
= temp_downclock
;
789 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
790 "Normal clock %dKhz, downclock %dKhz\n",
791 panel_fixed_mode
->clock
, temp_downclock
);
797 * Enumerate the child dev array parsed from VBT to check whether
798 * the LVDS is present.
799 * If it is present, return 1.
800 * If it is not present, return false.
801 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
802 * Note: The addin_offset should also be checked for LVDS panel.
803 * Only when it is non-zero, it is assumed that it is present.
805 static int lvds_is_present_in_vbt(struct drm_device
*dev
)
807 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
808 struct child_device_config
*p_child
;
811 if (!dev_priv
->child_dev_num
)
815 for (i
= 0; i
< dev_priv
->child_dev_num
; i
++) {
816 p_child
= dev_priv
->child_dev
+ i
;
818 * If the device type is not LFP, continue.
819 * If the device type is 0x22, it is also regarded as LFP.
821 if (p_child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
822 p_child
->device_type
!= DEVICE_TYPE_LFP
)
825 /* The addin_offset should be checked. Only when it is
826 * non-zero, it is regarded as present.
828 if (p_child
->addin_offset
) {
837 * intel_lvds_init - setup LVDS connectors on this device
840 * Create the connector, register the LVDS DDC bus, and try to figure out what
841 * modes we can display on the LVDS panel (if present).
843 void intel_lvds_init(struct drm_device
*dev
)
845 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
846 struct intel_encoder
*intel_encoder
;
847 struct intel_connector
*intel_connector
;
848 struct drm_connector
*connector
;
849 struct drm_encoder
*encoder
;
850 struct drm_display_mode
*scan
; /* *modes, *bios_mode; */
851 struct drm_crtc
*crtc
;
852 struct intel_lvds_priv
*lvds_priv
;
854 int pipe
, gpio
= GPIOC
;
856 /* Skip init on machines we know falsely report LVDS */
857 if (dmi_check_system(intel_no_lvds
))
860 if (!lvds_is_present_in_vbt(dev
)) {
861 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
865 if (HAS_PCH_SPLIT(dev
)) {
866 if ((I915_READ(PCH_LVDS
) & LVDS_DETECTED
) == 0)
868 if (dev_priv
->edp_support
) {
869 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
875 intel_encoder
= kzalloc(sizeof(struct intel_encoder
) +
876 sizeof(struct intel_lvds_priv
), GFP_KERNEL
);
877 if (!intel_encoder
) {
881 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
882 if (!intel_connector
) {
883 kfree(intel_encoder
);
887 connector
= &intel_connector
->base
;
888 encoder
= &intel_encoder
->enc
;
889 drm_connector_init(dev
, &intel_connector
->base
, &intel_lvds_connector_funcs
,
890 DRM_MODE_CONNECTOR_LVDS
);
892 drm_encoder_init(dev
, &intel_encoder
->enc
, &intel_lvds_enc_funcs
,
893 DRM_MODE_ENCODER_LVDS
);
895 drm_mode_connector_attach_encoder(&intel_connector
->base
, &intel_encoder
->enc
);
896 intel_encoder
->type
= INTEL_OUTPUT_LVDS
;
898 intel_encoder
->clone_mask
= (1 << INTEL_LVDS_CLONE_BIT
);
899 intel_encoder
->crtc_mask
= (1 << 1);
901 intel_encoder
->crtc_mask
|= (1 << 0);
902 drm_encoder_helper_add(encoder
, &intel_lvds_helper_funcs
);
903 drm_connector_helper_add(connector
, &intel_lvds_connector_helper_funcs
);
904 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
905 connector
->interlace_allowed
= false;
906 connector
->doublescan_allowed
= false;
908 lvds_priv
= (struct intel_lvds_priv
*)(intel_encoder
+ 1);
909 intel_encoder
->dev_priv
= lvds_priv
;
910 /* create the scaling mode property */
911 drm_mode_create_scaling_mode_property(dev
);
913 * the initial panel fitting mode will be FULL_SCREEN.
916 drm_connector_attach_property(&intel_connector
->base
,
917 dev
->mode_config
.scaling_mode_property
,
918 DRM_MODE_SCALE_ASPECT
);
919 lvds_priv
->fitting_mode
= DRM_MODE_SCALE_ASPECT
;
922 * 1) check for EDID on DDC
923 * 2) check for VBT data
924 * 3) check to see if LVDS is already on
925 * if none of the above, no panel
926 * 4) make sure lid is open
927 * if closed, act like it's not there for now
930 /* Set up the DDC bus. */
931 intel_encoder
->ddc_bus
= intel_i2c_create(dev
, gpio
, "LVDSDDC_C");
932 if (!intel_encoder
->ddc_bus
) {
933 dev_printk(KERN_ERR
, &dev
->pdev
->dev
, "DDC bus registration "
939 * Attempt to get the fixed panel mode from DDC. Assume that the
940 * preferred mode is the right one.
942 dev_priv
->lvds_edid_good
= true;
944 if (!intel_ddc_get_modes(connector
, intel_encoder
->ddc_bus
))
945 dev_priv
->lvds_edid_good
= false;
947 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
948 mutex_lock(&dev
->mode_config
.mutex
);
949 if (scan
->type
& DRM_MODE_TYPE_PREFERRED
) {
950 dev_priv
->panel_fixed_mode
=
951 drm_mode_duplicate(dev
, scan
);
952 mutex_unlock(&dev
->mode_config
.mutex
);
953 intel_find_lvds_downclock(dev
, connector
);
956 mutex_unlock(&dev
->mode_config
.mutex
);
959 /* Failed to get EDID, what about VBT? */
960 if (dev_priv
->lfp_lvds_vbt_mode
) {
961 mutex_lock(&dev
->mode_config
.mutex
);
962 dev_priv
->panel_fixed_mode
=
963 drm_mode_duplicate(dev
, dev_priv
->lfp_lvds_vbt_mode
);
964 mutex_unlock(&dev
->mode_config
.mutex
);
965 if (dev_priv
->panel_fixed_mode
) {
966 dev_priv
->panel_fixed_mode
->type
|=
967 DRM_MODE_TYPE_PREFERRED
;
973 * If we didn't get EDID, try checking if the panel is already turned
974 * on. If so, assume that whatever is currently programmed is the
978 /* Ironlake: FIXME if still fail, not try pipe mode now */
979 if (HAS_PCH_SPLIT(dev
))
982 lvds
= I915_READ(LVDS
);
983 pipe
= (lvds
& LVDS_PIPEB_SELECT
) ? 1 : 0;
984 crtc
= intel_get_crtc_from_pipe(dev
, pipe
);
986 if (crtc
&& (lvds
& LVDS_PORT_EN
)) {
987 dev_priv
->panel_fixed_mode
= intel_crtc_mode_get(dev
, crtc
);
988 if (dev_priv
->panel_fixed_mode
) {
989 dev_priv
->panel_fixed_mode
->type
|=
990 DRM_MODE_TYPE_PREFERRED
;
995 /* If we still don't have a mode after all that, give up. */
996 if (!dev_priv
->panel_fixed_mode
)
1000 if (HAS_PCH_SPLIT(dev
)) {
1002 /* make sure PWM is enabled */
1003 pwm
= I915_READ(BLC_PWM_CPU_CTL2
);
1004 pwm
|= (PWM_ENABLE
| PWM_PIPE_B
);
1005 I915_WRITE(BLC_PWM_CPU_CTL2
, pwm
);
1007 pwm
= I915_READ(BLC_PWM_PCH_CTL1
);
1008 pwm
|= PWM_PCH_ENABLE
;
1009 I915_WRITE(BLC_PWM_PCH_CTL1
, pwm
);
1011 dev_priv
->lid_notifier
.notifier_call
= intel_lid_notify
;
1012 if (acpi_lid_notifier_register(&dev_priv
->lid_notifier
)) {
1013 DRM_DEBUG_KMS("lid notifier registration failed\n");
1014 dev_priv
->lid_notifier
.notifier_call
= NULL
;
1016 /* keep the LVDS connector */
1017 dev_priv
->int_lvds_connector
= connector
;
1018 drm_sysfs_connector_add(connector
);
1022 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1023 if (intel_encoder
->ddc_bus
)
1024 intel_i2c_destroy(intel_encoder
->ddc_bus
);
1025 drm_connector_cleanup(connector
);
1026 drm_encoder_cleanup(encoder
);
1027 kfree(intel_encoder
);
1028 kfree(intel_connector
);