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_enable(struct intel_lvds *intel_lvds)
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;
85 I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);
87 if (intel_lvds->pfit_dirty) {
89 * Enable automatic panel scaling so that non-native modes
90 * fill the screen. The panel fitter should only be
91 * adjusted whilst the pipe is disabled, according to
92 * register description and PRM.
94 DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
95 intel_lvds->pfit_control,
96 intel_lvds->pfit_pgm_ratios);
97 if (wait_for((I915_READ(PP_STATUS) & PP_ON) == 0, 1000)) {
98 DRM_ERROR("timed out waiting for panel to power off\n");
100 I915_WRITE(PFIT_PGM_RATIOS, intel_lvds->pfit_pgm_ratios);
101 I915_WRITE(PFIT_CONTROL, intel_lvds->pfit_control);
102 intel_lvds->pfit_dirty = false;
106 I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
107 POSTING_READ(lvds_reg);
109 intel_panel_enable_backlight(dev);
112 static void intel_lvds_disable(struct intel_lvds *intel_lvds)
114 struct drm_device *dev = intel_lvds->base.base.dev;
115 struct drm_i915_private *dev_priv = dev->dev_private;
116 u32 ctl_reg, lvds_reg;
118 if (HAS_PCH_SPLIT(dev)) {
119 ctl_reg = PCH_PP_CONTROL;
122 ctl_reg = PP_CONTROL;
126 intel_panel_disable_backlight(dev);
128 I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
130 if (intel_lvds->pfit_control) {
131 if (wait_for((I915_READ(PP_STATUS) & PP_ON) == 0, 1000))
132 DRM_ERROR("timed out waiting for panel to power off\n");
134 I915_WRITE(PFIT_CONTROL, 0);
135 intel_lvds->pfit_dirty = true;
138 I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
139 POSTING_READ(lvds_reg);
142 static void intel_lvds_dpms(struct drm_encoder *encoder, int mode)
144 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
146 if (mode == DRM_MODE_DPMS_ON)
147 intel_lvds_enable(intel_lvds);
149 intel_lvds_disable(intel_lvds);
151 /* XXX: We never power down the LVDS pairs. */
154 static int intel_lvds_mode_valid(struct drm_connector *connector,
155 struct drm_display_mode *mode)
157 struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
158 struct drm_display_mode *fixed_mode = intel_lvds->fixed_mode;
160 if (mode->hdisplay > fixed_mode->hdisplay)
162 if (mode->vdisplay > fixed_mode->vdisplay)
169 centre_horizontally(struct drm_display_mode *mode,
172 u32 border, sync_pos, blank_width, sync_width;
174 /* keep the hsync and hblank widths constant */
175 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
176 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
177 sync_pos = (blank_width - sync_width + 1) / 2;
179 border = (mode->hdisplay - width + 1) / 2;
180 border += border & 1; /* make the border even */
182 mode->crtc_hdisplay = width;
183 mode->crtc_hblank_start = width + border;
184 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
186 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
187 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
191 centre_vertically(struct drm_display_mode *mode,
194 u32 border, sync_pos, blank_width, sync_width;
196 /* keep the vsync and vblank widths constant */
197 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
198 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
199 sync_pos = (blank_width - sync_width + 1) / 2;
201 border = (mode->vdisplay - height + 1) / 2;
203 mode->crtc_vdisplay = height;
204 mode->crtc_vblank_start = height + border;
205 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
207 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
208 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
211 static inline u32 panel_fitter_scaling(u32 source, u32 target)
214 * Floating point operation is not supported. So the FACTOR
215 * is defined, which can avoid the floating point computation
216 * when calculating the panel ratio.
219 #define FACTOR (1 << ACCURACY)
220 u32 ratio = source * FACTOR / target;
221 return (FACTOR * ratio + FACTOR/2) / FACTOR;
224 static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
225 struct drm_display_mode *mode,
226 struct drm_display_mode *adjusted_mode)
228 struct drm_device *dev = encoder->dev;
229 struct drm_i915_private *dev_priv = dev->dev_private;
230 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
231 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
232 struct drm_encoder *tmp_encoder;
233 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
235 /* Should never happen!! */
236 if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
237 DRM_ERROR("Can't support LVDS on pipe A\n");
241 /* Should never happen!! */
242 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, head) {
243 if (tmp_encoder != encoder && tmp_encoder->crtc == encoder->crtc) {
244 DRM_ERROR("Can't enable LVDS and another "
245 "encoder on the same pipe\n");
251 * We have timings from the BIOS for the panel, put them in
252 * to the adjusted mode. The CRTC will be set up for this mode,
253 * with the panel scaling set up to source from the H/VDisplay
254 * of the original mode.
256 intel_fixed_panel_mode(intel_lvds->fixed_mode, adjusted_mode);
258 if (HAS_PCH_SPLIT(dev)) {
259 intel_pch_panel_fitting(dev, intel_lvds->fitting_mode,
260 mode, adjusted_mode);
264 /* Make sure pre-965s set dither correctly */
265 if (INTEL_INFO(dev)->gen < 4) {
266 if (dev_priv->lvds_dither)
267 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
270 /* Native modes don't need fitting */
271 if (adjusted_mode->hdisplay == mode->hdisplay &&
272 adjusted_mode->vdisplay == mode->vdisplay)
275 /* 965+ wants fuzzy fitting */
276 if (INTEL_INFO(dev)->gen >= 4)
277 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
281 * Enable automatic panel scaling for non-native modes so that they fill
282 * the screen. Should be enabled before the pipe is enabled, according
283 * to register description and PRM.
284 * Change the value here to see the borders for debugging
286 I915_WRITE(BCLRPAT_A, 0);
287 I915_WRITE(BCLRPAT_B, 0);
289 switch (intel_lvds->fitting_mode) {
290 case DRM_MODE_SCALE_CENTER:
292 * For centered modes, we have to calculate border widths &
293 * heights and modify the values programmed into the CRTC.
295 centre_horizontally(adjusted_mode, mode->hdisplay);
296 centre_vertically(adjusted_mode, mode->vdisplay);
297 border = LVDS_BORDER_ENABLE;
300 case DRM_MODE_SCALE_ASPECT:
301 /* Scale but preserve the aspect ratio */
302 if (INTEL_INFO(dev)->gen >= 4) {
303 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
304 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
306 /* 965+ is easy, it does everything in hw */
307 if (scaled_width > scaled_height)
308 pfit_control |= PFIT_ENABLE | PFIT_SCALING_PILLAR;
309 else if (scaled_width < scaled_height)
310 pfit_control |= PFIT_ENABLE | PFIT_SCALING_LETTER;
311 else if (adjusted_mode->hdisplay != mode->hdisplay)
312 pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
314 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
315 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
317 * For earlier chips we have to calculate the scaling
318 * ratio by hand and program it into the
319 * PFIT_PGM_RATIO register
321 if (scaled_width > scaled_height) { /* pillar */
322 centre_horizontally(adjusted_mode, scaled_height / mode->vdisplay);
324 border = LVDS_BORDER_ENABLE;
325 if (mode->vdisplay != adjusted_mode->vdisplay) {
326 u32 bits = panel_fitter_scaling(mode->vdisplay, adjusted_mode->vdisplay);
327 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
328 bits << PFIT_VERT_SCALE_SHIFT);
329 pfit_control |= (PFIT_ENABLE |
330 VERT_INTERP_BILINEAR |
331 HORIZ_INTERP_BILINEAR);
333 } else if (scaled_width < scaled_height) { /* letter */
334 centre_vertically(adjusted_mode, scaled_width / mode->hdisplay);
336 border = LVDS_BORDER_ENABLE;
337 if (mode->hdisplay != adjusted_mode->hdisplay) {
338 u32 bits = panel_fitter_scaling(mode->hdisplay, adjusted_mode->hdisplay);
339 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
340 bits << PFIT_VERT_SCALE_SHIFT);
341 pfit_control |= (PFIT_ENABLE |
342 VERT_INTERP_BILINEAR |
343 HORIZ_INTERP_BILINEAR);
346 /* Aspects match, Let hw scale both directions */
347 pfit_control |= (PFIT_ENABLE |
348 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
349 VERT_INTERP_BILINEAR |
350 HORIZ_INTERP_BILINEAR);
354 case DRM_MODE_SCALE_FULLSCREEN:
356 * Full scaling, even if it changes the aspect ratio.
357 * Fortunately this is all done for us in hw.
359 if (mode->vdisplay != adjusted_mode->vdisplay ||
360 mode->hdisplay != adjusted_mode->hdisplay) {
361 pfit_control |= PFIT_ENABLE;
362 if (INTEL_INFO(dev)->gen >= 4)
363 pfit_control |= PFIT_SCALING_AUTO;
365 pfit_control |= (VERT_AUTO_SCALE |
366 VERT_INTERP_BILINEAR |
368 HORIZ_INTERP_BILINEAR);
377 if ((pfit_control & PFIT_ENABLE) == 0) {
381 if (pfit_control != intel_lvds->pfit_control ||
382 pfit_pgm_ratios != intel_lvds->pfit_pgm_ratios) {
383 intel_lvds->pfit_control = pfit_control;
384 intel_lvds->pfit_pgm_ratios = pfit_pgm_ratios;
385 intel_lvds->pfit_dirty = true;
387 dev_priv->lvds_border_bits = border;
390 * XXX: It would be nice to support lower refresh rates on the
391 * panels to reduce power consumption, and perhaps match the
392 * user's requested refresh rate.
398 static void intel_lvds_prepare(struct drm_encoder *encoder)
400 struct drm_device *dev = encoder->dev;
401 struct drm_i915_private *dev_priv = dev->dev_private;
402 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
404 /* We try to do the minimum that is necessary in order to unlock
405 * the registers for mode setting.
407 * On Ironlake, this is quite simple as we just set the unlock key
408 * and ignore all subtleties. (This may cause some issues...)
410 * Prior to Ironlake, we must disable the pipe if we want to adjust
411 * the panel fitter. However at all other times we can just reset
412 * the registers regardless.
415 if (HAS_PCH_SPLIT(dev)) {
416 I915_WRITE(PCH_PP_CONTROL,
417 I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
418 } else if (intel_lvds->pfit_dirty) {
419 I915_WRITE(PP_CONTROL,
420 (I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS)
423 I915_WRITE(PP_CONTROL,
424 I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
428 static void intel_lvds_commit(struct drm_encoder *encoder)
430 struct drm_device *dev = encoder->dev;
431 struct drm_i915_private *dev_priv = dev->dev_private;
432 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
434 /* Undo any unlocking done in prepare to prevent accidental
435 * adjustment of the registers.
437 if (HAS_PCH_SPLIT(dev)) {
438 u32 val = I915_READ(PCH_PP_CONTROL);
439 if ((val & PANEL_UNLOCK_REGS) == PANEL_UNLOCK_REGS)
440 I915_WRITE(PCH_PP_CONTROL, val & 0x3);
442 u32 val = I915_READ(PP_CONTROL);
443 if ((val & PANEL_UNLOCK_REGS) == PANEL_UNLOCK_REGS)
444 I915_WRITE(PP_CONTROL, val & 0x3);
447 /* Always do a full power on as we do not know what state
450 intel_lvds_enable(intel_lvds);
453 static void intel_lvds_mode_set(struct drm_encoder *encoder,
454 struct drm_display_mode *mode,
455 struct drm_display_mode *adjusted_mode)
458 * The LVDS pin pair will already have been turned on in the
459 * intel_crtc_mode_set since it has a large impact on the DPLL
465 * Detect the LVDS connection.
467 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
468 * connected and closed means disconnected. We also send hotplug events as
469 * needed, using lid status notification from the input layer.
471 static enum drm_connector_status
472 intel_lvds_detect(struct drm_connector *connector, bool force)
474 struct drm_device *dev = connector->dev;
475 enum drm_connector_status status = connector_status_connected;
477 /* ACPI lid methods were generally unreliable in this generation, so
480 if (IS_GEN2(dev) || IS_GEN3(dev))
481 return connector_status_connected;
487 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
489 static int intel_lvds_get_modes(struct drm_connector *connector)
491 struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
492 struct drm_device *dev = connector->dev;
493 struct drm_display_mode *mode;
495 if (intel_lvds->edid)
496 return drm_add_edid_modes(connector, intel_lvds->edid);
498 mode = drm_mode_duplicate(dev, intel_lvds->fixed_mode);
502 drm_mode_probed_add(connector, mode);
506 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
508 DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id->ident);
512 /* The GPU hangs up on these systems if modeset is performed on LID open */
513 static const struct dmi_system_id intel_no_modeset_on_lid[] = {
515 .callback = intel_no_modeset_on_lid_dmi_callback,
516 .ident = "Toshiba Tecra A11",
518 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
519 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
523 { } /* terminating entry */
527 * Lid events. Note the use of 'modeset_on_lid':
528 * - we set it on lid close, and reset it on open
529 * - we use it as a "only once" bit (ie we ignore
530 * duplicate events where it was already properly
532 * - the suspend/resume paths will also set it to
533 * zero, since they restore the mode ("lid open").
535 static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
538 struct drm_i915_private *dev_priv =
539 container_of(nb, struct drm_i915_private, lid_notifier);
540 struct drm_device *dev = dev_priv->dev;
541 struct drm_connector *connector = dev_priv->int_lvds_connector;
544 * check and update the status of LVDS connector after receiving
545 * the LID nofication event.
548 connector->status = connector->funcs->detect(connector,
551 /* Don't force modeset on machines where it causes a GPU lockup */
552 if (dmi_check_system(intel_no_modeset_on_lid))
554 if (!acpi_lid_open()) {
555 dev_priv->modeset_on_lid = 1;
559 if (!dev_priv->modeset_on_lid)
562 dev_priv->modeset_on_lid = 0;
564 mutex_lock(&dev->mode_config.mutex);
565 drm_helper_resume_force_mode(dev);
566 mutex_unlock(&dev->mode_config.mutex);
572 * intel_lvds_destroy - unregister and free LVDS structures
573 * @connector: connector to free
575 * Unregister the DDC bus for this connector then free the driver private
578 static void intel_lvds_destroy(struct drm_connector *connector)
580 struct drm_device *dev = connector->dev;
581 struct drm_i915_private *dev_priv = dev->dev_private;
583 if (dev_priv->lid_notifier.notifier_call)
584 acpi_lid_notifier_unregister(&dev_priv->lid_notifier);
585 drm_sysfs_connector_remove(connector);
586 drm_connector_cleanup(connector);
590 static int intel_lvds_set_property(struct drm_connector *connector,
591 struct drm_property *property,
594 struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
595 struct drm_device *dev = connector->dev;
597 if (property == dev->mode_config.scaling_mode_property) {
598 struct drm_crtc *crtc = intel_lvds->base.base.crtc;
600 if (value == DRM_MODE_SCALE_NONE) {
601 DRM_DEBUG_KMS("no scaling not supported\n");
605 if (intel_lvds->fitting_mode == value) {
606 /* the LVDS scaling property is not changed */
609 intel_lvds->fitting_mode = value;
610 if (crtc && crtc->enabled) {
612 * If the CRTC is enabled, the display will be changed
613 * according to the new panel fitting mode.
615 drm_crtc_helper_set_mode(crtc, &crtc->mode,
616 crtc->x, crtc->y, crtc->fb);
623 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
624 .dpms = intel_lvds_dpms,
625 .mode_fixup = intel_lvds_mode_fixup,
626 .prepare = intel_lvds_prepare,
627 .mode_set = intel_lvds_mode_set,
628 .commit = intel_lvds_commit,
631 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
632 .get_modes = intel_lvds_get_modes,
633 .mode_valid = intel_lvds_mode_valid,
634 .best_encoder = intel_best_encoder,
637 static const struct drm_connector_funcs intel_lvds_connector_funcs = {
638 .dpms = drm_helper_connector_dpms,
639 .detect = intel_lvds_detect,
640 .fill_modes = drm_helper_probe_single_connector_modes,
641 .set_property = intel_lvds_set_property,
642 .destroy = intel_lvds_destroy,
645 static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
646 .destroy = intel_encoder_destroy,
649 static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
651 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id->ident);
655 /* These systems claim to have LVDS, but really don't */
656 static const struct dmi_system_id intel_no_lvds[] = {
658 .callback = intel_no_lvds_dmi_callback,
659 .ident = "Apple Mac Mini (Core series)",
661 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
662 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
666 .callback = intel_no_lvds_dmi_callback,
667 .ident = "Apple Mac Mini (Core 2 series)",
669 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
670 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
674 .callback = intel_no_lvds_dmi_callback,
675 .ident = "MSI IM-945GSE-A",
677 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
678 DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
682 .callback = intel_no_lvds_dmi_callback,
683 .ident = "Dell Studio Hybrid",
685 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
686 DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
690 .callback = intel_no_lvds_dmi_callback,
691 .ident = "AOpen Mini PC",
693 DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
694 DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
698 .callback = intel_no_lvds_dmi_callback,
699 .ident = "AOpen Mini PC MP915",
701 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
702 DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
706 .callback = intel_no_lvds_dmi_callback,
707 .ident = "AOpen i915GMm-HFS",
709 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
710 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
714 .callback = intel_no_lvds_dmi_callback,
715 .ident = "Aopen i945GTt-VFA",
717 DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
721 .callback = intel_no_lvds_dmi_callback,
722 .ident = "Clientron U800",
724 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
725 DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
729 { } /* terminating entry */
733 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
735 * @connector: LVDS connector
737 * Find the reduced downclock for LVDS in EDID.
739 static void intel_find_lvds_downclock(struct drm_device *dev,
740 struct drm_display_mode *fixed_mode,
741 struct drm_connector *connector)
743 struct drm_i915_private *dev_priv = dev->dev_private;
744 struct drm_display_mode *scan;
747 temp_downclock = fixed_mode->clock;
748 list_for_each_entry(scan, &connector->probed_modes, head) {
750 * If one mode has the same resolution with the fixed_panel
751 * mode while they have the different refresh rate, it means
752 * that the reduced downclock is found for the LVDS. In such
753 * case we can set the different FPx0/1 to dynamically select
754 * between low and high frequency.
756 if (scan->hdisplay == fixed_mode->hdisplay &&
757 scan->hsync_start == fixed_mode->hsync_start &&
758 scan->hsync_end == fixed_mode->hsync_end &&
759 scan->htotal == fixed_mode->htotal &&
760 scan->vdisplay == fixed_mode->vdisplay &&
761 scan->vsync_start == fixed_mode->vsync_start &&
762 scan->vsync_end == fixed_mode->vsync_end &&
763 scan->vtotal == fixed_mode->vtotal) {
764 if (scan->clock < temp_downclock) {
766 * The downclock is already found. But we
767 * expect to find the lower downclock.
769 temp_downclock = scan->clock;
773 if (temp_downclock < fixed_mode->clock && i915_lvds_downclock) {
774 /* We found the downclock for LVDS. */
775 dev_priv->lvds_downclock_avail = 1;
776 dev_priv->lvds_downclock = temp_downclock;
777 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
778 "Normal clock %dKhz, downclock %dKhz\n",
779 fixed_mode->clock, temp_downclock);
784 * Enumerate the child dev array parsed from VBT to check whether
785 * the LVDS is present.
786 * If it is present, return 1.
787 * If it is not present, return false.
788 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
790 static bool lvds_is_present_in_vbt(struct drm_device *dev,
793 struct drm_i915_private *dev_priv = dev->dev_private;
796 if (!dev_priv->child_dev_num)
799 for (i = 0; i < dev_priv->child_dev_num; i++) {
800 struct child_device_config *child = dev_priv->child_dev + i;
802 /* If the device type is not LFP, continue.
803 * We have to check both the new identifiers as well as the
804 * old for compatibility with some BIOSes.
806 if (child->device_type != DEVICE_TYPE_INT_LFP &&
807 child->device_type != DEVICE_TYPE_LFP)
811 *i2c_pin = child->i2c_pin;
813 /* However, we cannot trust the BIOS writers to populate
814 * the VBT correctly. Since LVDS requires additional
815 * information from AIM blocks, a non-zero addin offset is
816 * a good indicator that the LVDS is actually present.
818 if (child->addin_offset)
821 /* But even then some BIOS writers perform some black magic
822 * and instantiate the device without reference to any
823 * additional data. Trust that if the VBT was written into
824 * the OpRegion then they have validated the LVDS's existence.
826 if (dev_priv->opregion.vbt)
833 static bool intel_lvds_ddc_probe(struct drm_device *dev, u8 pin)
835 struct drm_i915_private *dev_priv = dev->dev_private;
837 struct i2c_msg msgs[] = {
845 struct i2c_adapter *i2c = &dev_priv->gmbus[pin].adapter;
846 /* XXX this only appears to work when using GMBUS */
847 if (intel_gmbus_is_forced_bit(i2c))
849 return i2c_transfer(i2c, msgs, 1) == 1;
853 * intel_lvds_init - setup LVDS connectors on this device
856 * Create the connector, register the LVDS DDC bus, and try to figure out what
857 * modes we can display on the LVDS panel (if present).
859 bool intel_lvds_init(struct drm_device *dev)
861 struct drm_i915_private *dev_priv = dev->dev_private;
862 struct intel_lvds *intel_lvds;
863 struct intel_encoder *intel_encoder;
864 struct intel_connector *intel_connector;
865 struct drm_connector *connector;
866 struct drm_encoder *encoder;
867 struct drm_display_mode *scan; /* *modes, *bios_mode; */
868 struct drm_crtc *crtc;
873 /* Skip init on machines we know falsely report LVDS */
874 if (dmi_check_system(intel_no_lvds))
877 pin = GMBUS_PORT_PANEL;
878 if (!lvds_is_present_in_vbt(dev, &pin)) {
879 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
883 if (HAS_PCH_SPLIT(dev)) {
884 if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
886 if (dev_priv->edp.support) {
887 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
892 if (!intel_lvds_ddc_probe(dev, pin)) {
893 DRM_DEBUG_KMS("LVDS did not respond to DDC probe\n");
897 intel_lvds = kzalloc(sizeof(struct intel_lvds), GFP_KERNEL);
902 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
903 if (!intel_connector) {
908 if (!HAS_PCH_SPLIT(dev)) {
909 intel_lvds->pfit_control = I915_READ(PFIT_CONTROL);
912 intel_encoder = &intel_lvds->base;
913 encoder = &intel_encoder->base;
914 connector = &intel_connector->base;
915 drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
916 DRM_MODE_CONNECTOR_LVDS);
918 drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
919 DRM_MODE_ENCODER_LVDS);
921 intel_connector_attach_encoder(intel_connector, intel_encoder);
922 intel_encoder->type = INTEL_OUTPUT_LVDS;
924 intel_encoder->clone_mask = (1 << INTEL_LVDS_CLONE_BIT);
925 intel_encoder->crtc_mask = (1 << 1);
926 if (INTEL_INFO(dev)->gen >= 5)
927 intel_encoder->crtc_mask |= (1 << 0);
928 drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
929 drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
930 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
931 connector->interlace_allowed = false;
932 connector->doublescan_allowed = false;
934 /* create the scaling mode property */
935 drm_mode_create_scaling_mode_property(dev);
937 * the initial panel fitting mode will be FULL_SCREEN.
940 drm_connector_attach_property(&intel_connector->base,
941 dev->mode_config.scaling_mode_property,
942 DRM_MODE_SCALE_ASPECT);
943 intel_lvds->fitting_mode = DRM_MODE_SCALE_ASPECT;
946 * 1) check for EDID on DDC
947 * 2) check for VBT data
948 * 3) check to see if LVDS is already on
949 * if none of the above, no panel
950 * 4) make sure lid is open
951 * if closed, act like it's not there for now
955 * Attempt to get the fixed panel mode from DDC. Assume that the
956 * preferred mode is the right one.
958 intel_lvds->edid = drm_get_edid(connector,
959 &dev_priv->gmbus[pin].adapter);
960 if (intel_lvds->edid) {
961 if (drm_add_edid_modes(connector,
963 drm_mode_connector_update_edid_property(connector,
966 kfree(intel_lvds->edid);
967 intel_lvds->edid = NULL;
970 if (!intel_lvds->edid) {
971 /* Didn't get an EDID, so
972 * Set wide sync ranges so we get all modes
973 * handed to valid_mode for checking
975 connector->display_info.min_vfreq = 0;
976 connector->display_info.max_vfreq = 200;
977 connector->display_info.min_hfreq = 0;
978 connector->display_info.max_hfreq = 200;
981 list_for_each_entry(scan, &connector->probed_modes, head) {
982 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
983 intel_lvds->fixed_mode =
984 drm_mode_duplicate(dev, scan);
985 intel_find_lvds_downclock(dev,
986 intel_lvds->fixed_mode,
992 /* Failed to get EDID, what about VBT? */
993 if (dev_priv->lfp_lvds_vbt_mode) {
994 intel_lvds->fixed_mode =
995 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
996 if (intel_lvds->fixed_mode) {
997 intel_lvds->fixed_mode->type |=
998 DRM_MODE_TYPE_PREFERRED;
1004 * If we didn't get EDID, try checking if the panel is already turned
1005 * on. If so, assume that whatever is currently programmed is the
1009 /* Ironlake: FIXME if still fail, not try pipe mode now */
1010 if (HAS_PCH_SPLIT(dev))
1013 lvds = I915_READ(LVDS);
1014 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
1015 crtc = intel_get_crtc_for_pipe(dev, pipe);
1017 if (crtc && (lvds & LVDS_PORT_EN)) {
1018 intel_lvds->fixed_mode = intel_crtc_mode_get(dev, crtc);
1019 if (intel_lvds->fixed_mode) {
1020 intel_lvds->fixed_mode->type |=
1021 DRM_MODE_TYPE_PREFERRED;
1026 /* If we still don't have a mode after all that, give up. */
1027 if (!intel_lvds->fixed_mode)
1031 if (HAS_PCH_SPLIT(dev)) {
1034 pipe = (I915_READ(PCH_LVDS) & LVDS_PIPEB_SELECT) ? 1 : 0;
1036 /* make sure PWM is enabled and locked to the LVDS pipe */
1037 pwm = I915_READ(BLC_PWM_CPU_CTL2);
1038 if (pipe == 0 && (pwm & PWM_PIPE_B))
1039 I915_WRITE(BLC_PWM_CPU_CTL2, pwm & ~PWM_ENABLE);
1044 I915_WRITE(BLC_PWM_CPU_CTL2, pwm | PWM_ENABLE);
1046 pwm = I915_READ(BLC_PWM_PCH_CTL1);
1047 pwm |= PWM_PCH_ENABLE;
1048 I915_WRITE(BLC_PWM_PCH_CTL1, pwm);
1050 dev_priv->lid_notifier.notifier_call = intel_lid_notify;
1051 if (acpi_lid_notifier_register(&dev_priv->lid_notifier)) {
1052 DRM_DEBUG_KMS("lid notifier registration failed\n");
1053 dev_priv->lid_notifier.notifier_call = NULL;
1055 /* keep the LVDS connector */
1056 dev_priv->int_lvds_connector = connector;
1057 drm_sysfs_connector_add(connector);
1061 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1062 drm_connector_cleanup(connector);
1063 drm_encoder_cleanup(encoder);
1065 kfree(intel_connector);