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, stat_reg;
77 if (HAS_PCH_SPLIT(dev)) {
78 ctl_reg = PCH_PP_CONTROL;
80 stat_reg = PCH_PP_STATUS;
87 I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);
89 if (intel_lvds->pfit_dirty) {
91 * Enable automatic panel scaling so that non-native modes
92 * fill the screen. The panel fitter should only be
93 * adjusted whilst the pipe is disabled, according to
94 * register description and PRM.
96 DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
97 intel_lvds->pfit_control,
98 intel_lvds->pfit_pgm_ratios);
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;
105 I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
106 POSTING_READ(lvds_reg);
107 if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
108 DRM_ERROR("timed out waiting for panel to power on\n");
110 intel_panel_enable_backlight(dev);
113 static void intel_lvds_disable(struct intel_lvds *intel_lvds)
115 struct drm_device *dev = intel_lvds->base.base.dev;
116 struct drm_i915_private *dev_priv = dev->dev_private;
117 u32 ctl_reg, lvds_reg, stat_reg;
119 if (HAS_PCH_SPLIT(dev)) {
120 ctl_reg = PCH_PP_CONTROL;
122 stat_reg = PCH_PP_STATUS;
124 ctl_reg = PP_CONTROL;
126 stat_reg = PP_STATUS;
129 intel_panel_disable_backlight(dev);
131 I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
132 if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000))
133 DRM_ERROR("timed out waiting for panel to power off\n");
135 if (intel_lvds->pfit_control) {
136 I915_WRITE(PFIT_CONTROL, 0);
137 intel_lvds->pfit_dirty = true;
140 I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
141 POSTING_READ(lvds_reg);
144 static void intel_lvds_dpms(struct drm_encoder *encoder, int mode)
146 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
148 if (mode == DRM_MODE_DPMS_ON)
149 intel_lvds_enable(intel_lvds);
151 intel_lvds_disable(intel_lvds);
153 /* XXX: We never power down the LVDS pairs. */
156 static int intel_lvds_mode_valid(struct drm_connector *connector,
157 struct drm_display_mode *mode)
159 struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
160 struct drm_display_mode *fixed_mode = intel_lvds->fixed_mode;
162 if (mode->hdisplay > fixed_mode->hdisplay)
164 if (mode->vdisplay > fixed_mode->vdisplay)
171 centre_horizontally(struct drm_display_mode *mode,
174 u32 border, sync_pos, blank_width, sync_width;
176 /* keep the hsync and hblank widths constant */
177 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
178 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
179 sync_pos = (blank_width - sync_width + 1) / 2;
181 border = (mode->hdisplay - width + 1) / 2;
182 border += border & 1; /* make the border even */
184 mode->crtc_hdisplay = width;
185 mode->crtc_hblank_start = width + border;
186 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
188 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
189 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
193 centre_vertically(struct drm_display_mode *mode,
196 u32 border, sync_pos, blank_width, sync_width;
198 /* keep the vsync and vblank widths constant */
199 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
200 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
201 sync_pos = (blank_width - sync_width + 1) / 2;
203 border = (mode->vdisplay - height + 1) / 2;
205 mode->crtc_vdisplay = height;
206 mode->crtc_vblank_start = height + border;
207 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
209 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
210 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
213 static inline u32 panel_fitter_scaling(u32 source, u32 target)
216 * Floating point operation is not supported. So the FACTOR
217 * is defined, which can avoid the floating point computation
218 * when calculating the panel ratio.
221 #define FACTOR (1 << ACCURACY)
222 u32 ratio = source * FACTOR / target;
223 return (FACTOR * ratio + FACTOR/2) / FACTOR;
226 static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
227 struct drm_display_mode *mode,
228 struct drm_display_mode *adjusted_mode)
230 struct drm_device *dev = encoder->dev;
231 struct drm_i915_private *dev_priv = dev->dev_private;
232 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
233 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
234 struct drm_encoder *tmp_encoder;
235 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
238 /* Should never happen!! */
239 if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
240 DRM_ERROR("Can't support LVDS on pipe A\n");
244 /* Should never happen!! */
245 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, head) {
246 if (tmp_encoder != encoder && tmp_encoder->crtc == encoder->crtc) {
247 DRM_ERROR("Can't enable LVDS and another "
248 "encoder on the same pipe\n");
254 * We have timings from the BIOS for the panel, put them in
255 * to the adjusted mode. The CRTC will be set up for this mode,
256 * with the panel scaling set up to source from the H/VDisplay
257 * of the original mode.
259 intel_fixed_panel_mode(intel_lvds->fixed_mode, adjusted_mode);
261 if (HAS_PCH_SPLIT(dev)) {
262 intel_pch_panel_fitting(dev, intel_lvds->fitting_mode,
263 mode, adjusted_mode);
267 /* Native modes don't need fitting */
268 if (adjusted_mode->hdisplay == mode->hdisplay &&
269 adjusted_mode->vdisplay == mode->vdisplay)
272 /* 965+ wants fuzzy fitting */
273 if (INTEL_INFO(dev)->gen >= 4)
274 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
278 * Enable automatic panel scaling for non-native modes so that they fill
279 * the screen. Should be enabled before the pipe is enabled, according
280 * to register description and PRM.
281 * Change the value here to see the borders for debugging
284 I915_WRITE(BCLRPAT(pipe), 0);
286 switch (intel_lvds->fitting_mode) {
287 case DRM_MODE_SCALE_CENTER:
289 * For centered modes, we have to calculate border widths &
290 * heights and modify the values programmed into the CRTC.
292 centre_horizontally(adjusted_mode, mode->hdisplay);
293 centre_vertically(adjusted_mode, mode->vdisplay);
294 border = LVDS_BORDER_ENABLE;
297 case DRM_MODE_SCALE_ASPECT:
298 /* Scale but preserve the aspect ratio */
299 if (INTEL_INFO(dev)->gen >= 4) {
300 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
301 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
303 /* 965+ is easy, it does everything in hw */
304 if (scaled_width > scaled_height)
305 pfit_control |= PFIT_ENABLE | PFIT_SCALING_PILLAR;
306 else if (scaled_width < scaled_height)
307 pfit_control |= PFIT_ENABLE | PFIT_SCALING_LETTER;
308 else if (adjusted_mode->hdisplay != mode->hdisplay)
309 pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
311 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
312 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
314 * For earlier chips we have to calculate the scaling
315 * ratio by hand and program it into the
316 * PFIT_PGM_RATIO register
318 if (scaled_width > scaled_height) { /* pillar */
319 centre_horizontally(adjusted_mode, scaled_height / mode->vdisplay);
321 border = LVDS_BORDER_ENABLE;
322 if (mode->vdisplay != adjusted_mode->vdisplay) {
323 u32 bits = panel_fitter_scaling(mode->vdisplay, adjusted_mode->vdisplay);
324 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
325 bits << PFIT_VERT_SCALE_SHIFT);
326 pfit_control |= (PFIT_ENABLE |
327 VERT_INTERP_BILINEAR |
328 HORIZ_INTERP_BILINEAR);
330 } else if (scaled_width < scaled_height) { /* letter */
331 centre_vertically(adjusted_mode, scaled_width / mode->hdisplay);
333 border = LVDS_BORDER_ENABLE;
334 if (mode->hdisplay != adjusted_mode->hdisplay) {
335 u32 bits = panel_fitter_scaling(mode->hdisplay, adjusted_mode->hdisplay);
336 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
337 bits << PFIT_VERT_SCALE_SHIFT);
338 pfit_control |= (PFIT_ENABLE |
339 VERT_INTERP_BILINEAR |
340 HORIZ_INTERP_BILINEAR);
343 /* Aspects match, Let hw scale both directions */
344 pfit_control |= (PFIT_ENABLE |
345 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
346 VERT_INTERP_BILINEAR |
347 HORIZ_INTERP_BILINEAR);
351 case DRM_MODE_SCALE_FULLSCREEN:
353 * Full scaling, even if it changes the aspect ratio.
354 * Fortunately this is all done for us in hw.
356 if (mode->vdisplay != adjusted_mode->vdisplay ||
357 mode->hdisplay != adjusted_mode->hdisplay) {
358 pfit_control |= PFIT_ENABLE;
359 if (INTEL_INFO(dev)->gen >= 4)
360 pfit_control |= PFIT_SCALING_AUTO;
362 pfit_control |= (VERT_AUTO_SCALE |
363 VERT_INTERP_BILINEAR |
365 HORIZ_INTERP_BILINEAR);
374 /* If not enabling scaling, be consistent and always use 0. */
375 if ((pfit_control & PFIT_ENABLE) == 0) {
380 /* Make sure pre-965 set dither correctly */
381 if (INTEL_INFO(dev)->gen < 4 && dev_priv->lvds_dither)
382 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
384 if (pfit_control != intel_lvds->pfit_control ||
385 pfit_pgm_ratios != intel_lvds->pfit_pgm_ratios) {
386 intel_lvds->pfit_control = pfit_control;
387 intel_lvds->pfit_pgm_ratios = pfit_pgm_ratios;
388 intel_lvds->pfit_dirty = true;
390 dev_priv->lvds_border_bits = border;
393 * XXX: It would be nice to support lower refresh rates on the
394 * panels to reduce power consumption, and perhaps match the
395 * user's requested refresh rate.
401 static void intel_lvds_prepare(struct drm_encoder *encoder)
403 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
405 intel_lvds_disable(intel_lvds);
408 static void intel_lvds_commit(struct drm_encoder *encoder)
410 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
412 /* Always do a full power on as we do not know what state
415 intel_lvds_enable(intel_lvds);
418 static void intel_lvds_mode_set(struct drm_encoder *encoder,
419 struct drm_display_mode *mode,
420 struct drm_display_mode *adjusted_mode)
423 * The LVDS pin pair will already have been turned on in the
424 * intel_crtc_mode_set since it has a large impact on the DPLL
430 * Detect the LVDS connection.
432 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
433 * connected and closed means disconnected. We also send hotplug events as
434 * needed, using lid status notification from the input layer.
436 static enum drm_connector_status
437 intel_lvds_detect(struct drm_connector *connector, bool force)
439 struct drm_device *dev = connector->dev;
440 enum drm_connector_status status;
442 status = intel_panel_detect(dev);
443 if (status != connector_status_unknown)
446 return connector_status_connected;
450 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
452 static int intel_lvds_get_modes(struct drm_connector *connector)
454 struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
455 struct drm_device *dev = connector->dev;
456 struct drm_display_mode *mode;
458 if (intel_lvds->edid)
459 return drm_add_edid_modes(connector, intel_lvds->edid);
461 mode = drm_mode_duplicate(dev, intel_lvds->fixed_mode);
465 drm_mode_probed_add(connector, mode);
469 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
471 DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id->ident);
475 /* The GPU hangs up on these systems if modeset is performed on LID open */
476 static const struct dmi_system_id intel_no_modeset_on_lid[] = {
478 .callback = intel_no_modeset_on_lid_dmi_callback,
479 .ident = "Toshiba Tecra A11",
481 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
482 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
486 { } /* terminating entry */
490 * Lid events. Note the use of 'modeset_on_lid':
491 * - we set it on lid close, and reset it on open
492 * - we use it as a "only once" bit (ie we ignore
493 * duplicate events where it was already properly
495 * - the suspend/resume paths will also set it to
496 * zero, since they restore the mode ("lid open").
498 static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
501 struct drm_i915_private *dev_priv =
502 container_of(nb, struct drm_i915_private, lid_notifier);
503 struct drm_device *dev = dev_priv->dev;
504 struct drm_connector *connector = dev_priv->int_lvds_connector;
506 if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
510 * check and update the status of LVDS connector after receiving
511 * the LID nofication event.
514 connector->status = connector->funcs->detect(connector,
517 /* Don't force modeset on machines where it causes a GPU lockup */
518 if (dmi_check_system(intel_no_modeset_on_lid))
520 if (!acpi_lid_open()) {
521 dev_priv->modeset_on_lid = 1;
525 if (!dev_priv->modeset_on_lid)
528 dev_priv->modeset_on_lid = 0;
530 mutex_lock(&dev->mode_config.mutex);
531 drm_helper_resume_force_mode(dev);
532 i915_redisable_vga(dev);
533 mutex_unlock(&dev->mode_config.mutex);
539 * intel_lvds_destroy - unregister and free LVDS structures
540 * @connector: connector to free
542 * Unregister the DDC bus for this connector then free the driver private
545 static void intel_lvds_destroy(struct drm_connector *connector)
547 struct drm_device *dev = connector->dev;
548 struct drm_i915_private *dev_priv = dev->dev_private;
550 if (dev_priv->lid_notifier.notifier_call)
551 acpi_lid_notifier_unregister(&dev_priv->lid_notifier);
552 drm_sysfs_connector_remove(connector);
553 drm_connector_cleanup(connector);
557 static int intel_lvds_set_property(struct drm_connector *connector,
558 struct drm_property *property,
561 struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
562 struct drm_device *dev = connector->dev;
564 if (property == dev->mode_config.scaling_mode_property) {
565 struct drm_crtc *crtc = intel_lvds->base.base.crtc;
567 if (value == DRM_MODE_SCALE_NONE) {
568 DRM_DEBUG_KMS("no scaling not supported\n");
572 if (intel_lvds->fitting_mode == value) {
573 /* the LVDS scaling property is not changed */
576 intel_lvds->fitting_mode = value;
577 if (crtc && crtc->enabled) {
579 * If the CRTC is enabled, the display will be changed
580 * according to the new panel fitting mode.
582 drm_crtc_helper_set_mode(crtc, &crtc->mode,
583 crtc->x, crtc->y, crtc->fb);
590 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
591 .dpms = intel_lvds_dpms,
592 .mode_fixup = intel_lvds_mode_fixup,
593 .prepare = intel_lvds_prepare,
594 .mode_set = intel_lvds_mode_set,
595 .commit = intel_lvds_commit,
598 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
599 .get_modes = intel_lvds_get_modes,
600 .mode_valid = intel_lvds_mode_valid,
601 .best_encoder = intel_best_encoder,
604 static const struct drm_connector_funcs intel_lvds_connector_funcs = {
605 .dpms = drm_helper_connector_dpms,
606 .detect = intel_lvds_detect,
607 .fill_modes = drm_helper_probe_single_connector_modes,
608 .set_property = intel_lvds_set_property,
609 .destroy = intel_lvds_destroy,
612 static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
613 .destroy = intel_encoder_destroy,
616 static int intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
618 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id->ident);
622 /* These systems claim to have LVDS, but really don't */
623 static const struct dmi_system_id intel_no_lvds[] = {
625 .callback = intel_no_lvds_dmi_callback,
626 .ident = "Apple Mac Mini (Core series)",
628 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
629 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
633 .callback = intel_no_lvds_dmi_callback,
634 .ident = "Apple Mac Mini (Core 2 series)",
636 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
637 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
641 .callback = intel_no_lvds_dmi_callback,
642 .ident = "MSI IM-945GSE-A",
644 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
645 DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
649 .callback = intel_no_lvds_dmi_callback,
650 .ident = "Dell Studio Hybrid",
652 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
653 DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
657 .callback = intel_no_lvds_dmi_callback,
658 .ident = "Dell OptiPlex FX170",
660 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
661 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
665 .callback = intel_no_lvds_dmi_callback,
666 .ident = "AOpen Mini PC",
668 DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
669 DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
673 .callback = intel_no_lvds_dmi_callback,
674 .ident = "AOpen Mini PC MP915",
676 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
677 DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
681 .callback = intel_no_lvds_dmi_callback,
682 .ident = "AOpen i915GMm-HFS",
684 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
685 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
689 .callback = intel_no_lvds_dmi_callback,
690 .ident = "AOpen i45GMx-I",
692 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
693 DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
697 .callback = intel_no_lvds_dmi_callback,
698 .ident = "Aopen i945GTt-VFA",
700 DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
704 .callback = intel_no_lvds_dmi_callback,
705 .ident = "Clientron U800",
707 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
708 DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
712 .callback = intel_no_lvds_dmi_callback,
713 .ident = "Clientron E830",
715 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
716 DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
720 .callback = intel_no_lvds_dmi_callback,
721 .ident = "Asus EeeBox PC EB1007",
723 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
724 DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
728 .callback = intel_no_lvds_dmi_callback,
729 .ident = "Asus AT5NM10T-I",
731 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
732 DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
736 .callback = intel_no_lvds_dmi_callback,
737 .ident = "Hewlett-Packard HP t5740",
739 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
740 DMI_MATCH(DMI_PRODUCT_NAME, " t5740"),
744 .callback = intel_no_lvds_dmi_callback,
745 .ident = "Hewlett-Packard t5745",
747 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
748 DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
752 .callback = intel_no_lvds_dmi_callback,
753 .ident = "Hewlett-Packard st5747",
755 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
756 DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
760 .callback = intel_no_lvds_dmi_callback,
761 .ident = "MSI Wind Box DC500",
763 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
764 DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
768 .callback = intel_no_lvds_dmi_callback,
769 .ident = "Gigabyte GA-D525TUD",
771 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
772 DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
776 .callback = intel_no_lvds_dmi_callback,
777 .ident = "Supermicro X7SPA-H",
779 DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
780 DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"),
784 .callback = intel_no_lvds_dmi_callback,
785 .ident = "Fujitsu Esprimo Q900",
787 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
788 DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Q900"),
792 { } /* terminating entry */
796 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
798 * @connector: LVDS connector
800 * Find the reduced downclock for LVDS in EDID.
802 static void intel_find_lvds_downclock(struct drm_device *dev,
803 struct drm_display_mode *fixed_mode,
804 struct drm_connector *connector)
806 struct drm_i915_private *dev_priv = dev->dev_private;
807 struct drm_display_mode *scan;
810 temp_downclock = fixed_mode->clock;
811 list_for_each_entry(scan, &connector->probed_modes, head) {
813 * If one mode has the same resolution with the fixed_panel
814 * mode while they have the different refresh rate, it means
815 * that the reduced downclock is found for the LVDS. In such
816 * case we can set the different FPx0/1 to dynamically select
817 * between low and high frequency.
819 if (scan->hdisplay == fixed_mode->hdisplay &&
820 scan->hsync_start == fixed_mode->hsync_start &&
821 scan->hsync_end == fixed_mode->hsync_end &&
822 scan->htotal == fixed_mode->htotal &&
823 scan->vdisplay == fixed_mode->vdisplay &&
824 scan->vsync_start == fixed_mode->vsync_start &&
825 scan->vsync_end == fixed_mode->vsync_end &&
826 scan->vtotal == fixed_mode->vtotal) {
827 if (scan->clock < temp_downclock) {
829 * The downclock is already found. But we
830 * expect to find the lower downclock.
832 temp_downclock = scan->clock;
836 if (temp_downclock < fixed_mode->clock && i915_lvds_downclock) {
837 /* We found the downclock for LVDS. */
838 dev_priv->lvds_downclock_avail = 1;
839 dev_priv->lvds_downclock = temp_downclock;
840 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
841 "Normal clock %dKhz, downclock %dKhz\n",
842 fixed_mode->clock, temp_downclock);
847 * Enumerate the child dev array parsed from VBT to check whether
848 * the LVDS is present.
849 * If it is present, return 1.
850 * If it is not present, return false.
851 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
853 static bool lvds_is_present_in_vbt(struct drm_device *dev,
856 struct drm_i915_private *dev_priv = dev->dev_private;
859 if (!dev_priv->child_dev_num)
862 for (i = 0; i < dev_priv->child_dev_num; i++) {
863 struct child_device_config *child = dev_priv->child_dev + i;
865 /* If the device type is not LFP, continue.
866 * We have to check both the new identifiers as well as the
867 * old for compatibility with some BIOSes.
869 if (child->device_type != DEVICE_TYPE_INT_LFP &&
870 child->device_type != DEVICE_TYPE_LFP)
874 *i2c_pin = child->i2c_pin;
876 /* However, we cannot trust the BIOS writers to populate
877 * the VBT correctly. Since LVDS requires additional
878 * information from AIM blocks, a non-zero addin offset is
879 * a good indicator that the LVDS is actually present.
881 if (child->addin_offset)
884 /* But even then some BIOS writers perform some black magic
885 * and instantiate the device without reference to any
886 * additional data. Trust that if the VBT was written into
887 * the OpRegion then they have validated the LVDS's existence.
889 if (dev_priv->opregion.vbt)
897 * intel_lvds_init - setup LVDS connectors on this device
900 * Create the connector, register the LVDS DDC bus, and try to figure out what
901 * modes we can display on the LVDS panel (if present).
903 bool intel_lvds_init(struct drm_device *dev)
905 struct drm_i915_private *dev_priv = dev->dev_private;
906 struct intel_lvds *intel_lvds;
907 struct intel_encoder *intel_encoder;
908 struct intel_connector *intel_connector;
909 struct drm_connector *connector;
910 struct drm_encoder *encoder;
911 struct drm_display_mode *scan; /* *modes, *bios_mode; */
912 struct drm_crtc *crtc;
918 * Unlock registers and just leave them unlocked. Do this before
919 * checking quirk lists to avoid bogus WARNINGs.
921 if (HAS_PCH_SPLIT(dev)) {
922 I915_WRITE(PCH_PP_CONTROL,
923 I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
925 I915_WRITE(PP_CONTROL,
926 I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
929 /* Skip init on machines we know falsely report LVDS */
930 if (dmi_check_system(intel_no_lvds))
933 pin = GMBUS_PORT_PANEL;
934 if (!lvds_is_present_in_vbt(dev, &pin)) {
935 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
939 if (HAS_PCH_SPLIT(dev)) {
940 if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
942 if (dev_priv->edp.support) {
943 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
948 intel_lvds = kzalloc(sizeof(struct intel_lvds), GFP_KERNEL);
953 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
954 if (!intel_connector) {
959 if (!HAS_PCH_SPLIT(dev)) {
960 intel_lvds->pfit_control = I915_READ(PFIT_CONTROL);
963 intel_encoder = &intel_lvds->base;
964 encoder = &intel_encoder->base;
965 connector = &intel_connector->base;
966 drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
967 DRM_MODE_CONNECTOR_LVDS);
969 drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
970 DRM_MODE_ENCODER_LVDS);
972 intel_connector_attach_encoder(intel_connector, intel_encoder);
973 intel_encoder->type = INTEL_OUTPUT_LVDS;
975 intel_encoder->clone_mask = (1 << INTEL_LVDS_CLONE_BIT);
976 if (HAS_PCH_SPLIT(dev))
977 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
979 intel_encoder->crtc_mask = (1 << 1);
981 drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
982 drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
983 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
984 connector->interlace_allowed = false;
985 connector->doublescan_allowed = false;
987 /* create the scaling mode property */
988 drm_mode_create_scaling_mode_property(dev);
990 * the initial panel fitting mode will be FULL_SCREEN.
993 drm_connector_attach_property(&intel_connector->base,
994 dev->mode_config.scaling_mode_property,
995 DRM_MODE_SCALE_ASPECT);
996 intel_lvds->fitting_mode = DRM_MODE_SCALE_ASPECT;
999 * 1) check for EDID on DDC
1000 * 2) check for VBT data
1001 * 3) check to see if LVDS is already on
1002 * if none of the above, no panel
1003 * 4) make sure lid is open
1004 * if closed, act like it's not there for now
1008 * Attempt to get the fixed panel mode from DDC. Assume that the
1009 * preferred mode is the right one.
1011 intel_lvds->edid = drm_get_edid(connector,
1012 &dev_priv->gmbus[pin].adapter);
1013 if (intel_lvds->edid) {
1014 if (drm_add_edid_modes(connector,
1015 intel_lvds->edid)) {
1016 drm_mode_connector_update_edid_property(connector,
1019 kfree(intel_lvds->edid);
1020 intel_lvds->edid = NULL;
1023 if (!intel_lvds->edid) {
1024 /* Didn't get an EDID, so
1025 * Set wide sync ranges so we get all modes
1026 * handed to valid_mode for checking
1028 connector->display_info.min_vfreq = 0;
1029 connector->display_info.max_vfreq = 200;
1030 connector->display_info.min_hfreq = 0;
1031 connector->display_info.max_hfreq = 200;
1034 list_for_each_entry(scan, &connector->probed_modes, head) {
1035 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
1036 intel_lvds->fixed_mode =
1037 drm_mode_duplicate(dev, scan);
1038 intel_find_lvds_downclock(dev,
1039 intel_lvds->fixed_mode,
1045 /* Failed to get EDID, what about VBT? */
1046 if (dev_priv->lfp_lvds_vbt_mode) {
1047 intel_lvds->fixed_mode =
1048 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
1049 if (intel_lvds->fixed_mode) {
1050 intel_lvds->fixed_mode->type |=
1051 DRM_MODE_TYPE_PREFERRED;
1057 * If we didn't get EDID, try checking if the panel is already turned
1058 * on. If so, assume that whatever is currently programmed is the
1062 /* Ironlake: FIXME if still fail, not try pipe mode now */
1063 if (HAS_PCH_SPLIT(dev))
1066 lvds = I915_READ(LVDS);
1067 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
1068 crtc = intel_get_crtc_for_pipe(dev, pipe);
1070 if (crtc && (lvds & LVDS_PORT_EN)) {
1071 intel_lvds->fixed_mode = intel_crtc_mode_get(dev, crtc);
1072 if (intel_lvds->fixed_mode) {
1073 intel_lvds->fixed_mode->type |=
1074 DRM_MODE_TYPE_PREFERRED;
1079 /* If we still don't have a mode after all that, give up. */
1080 if (!intel_lvds->fixed_mode)
1084 if (HAS_PCH_SPLIT(dev) &&
1085 !(dev_priv->quirks & QUIRK_NO_PCH_PWM_ENABLE)) {
1088 pipe = (I915_READ(PCH_LVDS) & LVDS_PIPEB_SELECT) ? 1 : 0;
1090 /* make sure PWM is enabled and locked to the LVDS pipe */
1091 pwm = I915_READ(BLC_PWM_CPU_CTL2);
1092 if (pipe == 0 && (pwm & PWM_PIPE_B))
1093 I915_WRITE(BLC_PWM_CPU_CTL2, pwm & ~PWM_ENABLE);
1098 I915_WRITE(BLC_PWM_CPU_CTL2, pwm | PWM_ENABLE);
1100 pwm = I915_READ(BLC_PWM_PCH_CTL1);
1101 pwm |= PWM_PCH_ENABLE;
1102 I915_WRITE(BLC_PWM_PCH_CTL1, pwm);
1104 dev_priv->lid_notifier.notifier_call = intel_lid_notify;
1105 if (acpi_lid_notifier_register(&dev_priv->lid_notifier)) {
1106 DRM_DEBUG_KMS("lid notifier registration failed\n");
1107 dev_priv->lid_notifier.notifier_call = NULL;
1109 /* keep the LVDS connector */
1110 dev_priv->int_lvds_connector = connector;
1111 drm_sysfs_connector_add(connector);
1113 intel_panel_setup_backlight(dev);
1118 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1119 drm_connector_cleanup(connector);
1120 drm_encoder_cleanup(encoder);
1122 kfree(intel_connector);