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>
35 #include <drm/drm_crtc.h>
36 #include <drm/drm_edid.h>
37 #include "intel_drv.h"
38 #include <drm/i915_drm.h>
40 #include <linux/acpi.h>
42 /* Private structure for the integrated LVDS support */
44 struct intel_encoder base;
53 struct drm_display_mode *fixed_mode;
56 static struct intel_lvds *to_intel_lvds(struct drm_encoder *encoder)
58 return container_of(encoder, struct intel_lvds, base.base);
61 static struct intel_lvds *intel_attached_lvds(struct drm_connector *connector)
63 return container_of(intel_attached_encoder(connector),
64 struct intel_lvds, base);
67 static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
70 struct drm_device *dev = encoder->base.dev;
71 struct drm_i915_private *dev_priv = dev->dev_private;
74 if (HAS_PCH_SPLIT(dev)) {
80 tmp = I915_READ(lvds_reg);
82 if (!(tmp & LVDS_PORT_EN))
86 *pipe = PORT_TO_PIPE_CPT(tmp);
88 *pipe = PORT_TO_PIPE(tmp);
94 * Sets the power state for the panel.
96 static void intel_enable_lvds(struct intel_encoder *encoder)
98 struct drm_device *dev = encoder->base.dev;
99 struct intel_lvds *intel_lvds = to_intel_lvds(&encoder->base);
100 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
101 struct drm_i915_private *dev_priv = dev->dev_private;
102 u32 ctl_reg, lvds_reg, stat_reg;
104 if (HAS_PCH_SPLIT(dev)) {
105 ctl_reg = PCH_PP_CONTROL;
107 stat_reg = PCH_PP_STATUS;
109 ctl_reg = PP_CONTROL;
111 stat_reg = PP_STATUS;
114 I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);
116 if (intel_lvds->pfit_dirty) {
118 * Enable automatic panel scaling so that non-native modes
119 * fill the screen. The panel fitter should only be
120 * adjusted whilst the pipe is disabled, according to
121 * register description and PRM.
123 DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
124 intel_lvds->pfit_control,
125 intel_lvds->pfit_pgm_ratios);
127 I915_WRITE(PFIT_PGM_RATIOS, intel_lvds->pfit_pgm_ratios);
128 I915_WRITE(PFIT_CONTROL, intel_lvds->pfit_control);
129 intel_lvds->pfit_dirty = false;
132 I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
133 POSTING_READ(lvds_reg);
134 if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
135 DRM_ERROR("timed out waiting for panel to power on\n");
137 intel_panel_enable_backlight(dev, intel_crtc->pipe);
140 static void intel_disable_lvds(struct intel_encoder *encoder)
142 struct drm_device *dev = encoder->base.dev;
143 struct intel_lvds *intel_lvds = to_intel_lvds(&encoder->base);
144 struct drm_i915_private *dev_priv = dev->dev_private;
145 u32 ctl_reg, lvds_reg, stat_reg;
147 if (HAS_PCH_SPLIT(dev)) {
148 ctl_reg = PCH_PP_CONTROL;
150 stat_reg = PCH_PP_STATUS;
152 ctl_reg = PP_CONTROL;
154 stat_reg = PP_STATUS;
157 intel_panel_disable_backlight(dev);
159 I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
160 if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000))
161 DRM_ERROR("timed out waiting for panel to power off\n");
163 if (intel_lvds->pfit_control) {
164 I915_WRITE(PFIT_CONTROL, 0);
165 intel_lvds->pfit_dirty = true;
168 I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
169 POSTING_READ(lvds_reg);
172 static int intel_lvds_mode_valid(struct drm_connector *connector,
173 struct drm_display_mode *mode)
175 struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
176 struct drm_display_mode *fixed_mode = intel_lvds->fixed_mode;
178 if (mode->hdisplay > fixed_mode->hdisplay)
180 if (mode->vdisplay > fixed_mode->vdisplay)
187 centre_horizontally(struct drm_display_mode *mode,
190 u32 border, sync_pos, blank_width, sync_width;
192 /* keep the hsync and hblank widths constant */
193 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
194 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
195 sync_pos = (blank_width - sync_width + 1) / 2;
197 border = (mode->hdisplay - width + 1) / 2;
198 border += border & 1; /* make the border even */
200 mode->crtc_hdisplay = width;
201 mode->crtc_hblank_start = width + border;
202 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
204 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
205 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
207 mode->private_flags |= INTEL_MODE_CRTC_TIMINGS_SET;
211 centre_vertically(struct drm_display_mode *mode,
214 u32 border, sync_pos, blank_width, sync_width;
216 /* keep the vsync and vblank widths constant */
217 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
218 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
219 sync_pos = (blank_width - sync_width + 1) / 2;
221 border = (mode->vdisplay - height + 1) / 2;
223 mode->crtc_vdisplay = height;
224 mode->crtc_vblank_start = height + border;
225 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
227 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
228 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
230 mode->private_flags |= INTEL_MODE_CRTC_TIMINGS_SET;
233 static inline u32 panel_fitter_scaling(u32 source, u32 target)
236 * Floating point operation is not supported. So the FACTOR
237 * is defined, which can avoid the floating point computation
238 * when calculating the panel ratio.
241 #define FACTOR (1 << ACCURACY)
242 u32 ratio = source * FACTOR / target;
243 return (FACTOR * ratio + FACTOR/2) / FACTOR;
246 static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
247 const struct drm_display_mode *mode,
248 struct drm_display_mode *adjusted_mode)
250 struct drm_device *dev = encoder->dev;
251 struct drm_i915_private *dev_priv = dev->dev_private;
252 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
253 struct intel_crtc *intel_crtc = intel_lvds->base.new_crtc;
254 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
257 /* Should never happen!! */
258 if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
259 DRM_ERROR("Can't support LVDS on pipe A\n");
263 if (intel_encoder_check_is_cloned(&intel_lvds->base))
267 * We have timings from the BIOS for the panel, put them in
268 * to the adjusted mode. The CRTC will be set up for this mode,
269 * with the panel scaling set up to source from the H/VDisplay
270 * of the original mode.
272 intel_fixed_panel_mode(intel_lvds->fixed_mode, adjusted_mode);
274 if (HAS_PCH_SPLIT(dev)) {
275 intel_pch_panel_fitting(dev, intel_lvds->fitting_mode,
276 mode, adjusted_mode);
280 /* Native modes don't need fitting */
281 if (adjusted_mode->hdisplay == mode->hdisplay &&
282 adjusted_mode->vdisplay == mode->vdisplay)
285 /* 965+ wants fuzzy fitting */
286 if (INTEL_INFO(dev)->gen >= 4)
287 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
291 * Enable automatic panel scaling for non-native modes so that they fill
292 * the screen. Should be enabled before the pipe is enabled, according
293 * to register description and PRM.
294 * Change the value here to see the borders for debugging
297 I915_WRITE(BCLRPAT(pipe), 0);
299 drm_mode_set_crtcinfo(adjusted_mode, 0);
301 switch (intel_lvds->fitting_mode) {
302 case DRM_MODE_SCALE_CENTER:
304 * For centered modes, we have to calculate border widths &
305 * heights and modify the values programmed into the CRTC.
307 centre_horizontally(adjusted_mode, mode->hdisplay);
308 centre_vertically(adjusted_mode, mode->vdisplay);
309 border = LVDS_BORDER_ENABLE;
312 case DRM_MODE_SCALE_ASPECT:
313 /* Scale but preserve the aspect ratio */
314 if (INTEL_INFO(dev)->gen >= 4) {
315 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
316 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
318 /* 965+ is easy, it does everything in hw */
319 if (scaled_width > scaled_height)
320 pfit_control |= PFIT_ENABLE | PFIT_SCALING_PILLAR;
321 else if (scaled_width < scaled_height)
322 pfit_control |= PFIT_ENABLE | PFIT_SCALING_LETTER;
323 else if (adjusted_mode->hdisplay != mode->hdisplay)
324 pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
326 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
327 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
329 * For earlier chips we have to calculate the scaling
330 * ratio by hand and program it into the
331 * PFIT_PGM_RATIO register
333 if (scaled_width > scaled_height) { /* pillar */
334 centre_horizontally(adjusted_mode, scaled_height / mode->vdisplay);
336 border = LVDS_BORDER_ENABLE;
337 if (mode->vdisplay != adjusted_mode->vdisplay) {
338 u32 bits = panel_fitter_scaling(mode->vdisplay, adjusted_mode->vdisplay);
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);
345 } else if (scaled_width < scaled_height) { /* letter */
346 centre_vertically(adjusted_mode, scaled_width / mode->hdisplay);
348 border = LVDS_BORDER_ENABLE;
349 if (mode->hdisplay != adjusted_mode->hdisplay) {
350 u32 bits = panel_fitter_scaling(mode->hdisplay, adjusted_mode->hdisplay);
351 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
352 bits << PFIT_VERT_SCALE_SHIFT);
353 pfit_control |= (PFIT_ENABLE |
354 VERT_INTERP_BILINEAR |
355 HORIZ_INTERP_BILINEAR);
358 /* Aspects match, Let hw scale both directions */
359 pfit_control |= (PFIT_ENABLE |
360 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
361 VERT_INTERP_BILINEAR |
362 HORIZ_INTERP_BILINEAR);
366 case DRM_MODE_SCALE_FULLSCREEN:
368 * Full scaling, even if it changes the aspect ratio.
369 * Fortunately this is all done for us in hw.
371 if (mode->vdisplay != adjusted_mode->vdisplay ||
372 mode->hdisplay != adjusted_mode->hdisplay) {
373 pfit_control |= PFIT_ENABLE;
374 if (INTEL_INFO(dev)->gen >= 4)
375 pfit_control |= PFIT_SCALING_AUTO;
377 pfit_control |= (VERT_AUTO_SCALE |
378 VERT_INTERP_BILINEAR |
380 HORIZ_INTERP_BILINEAR);
389 /* If not enabling scaling, be consistent and always use 0. */
390 if ((pfit_control & PFIT_ENABLE) == 0) {
395 /* Make sure pre-965 set dither correctly */
396 if (INTEL_INFO(dev)->gen < 4 && dev_priv->lvds_dither)
397 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
399 if (pfit_control != intel_lvds->pfit_control ||
400 pfit_pgm_ratios != intel_lvds->pfit_pgm_ratios) {
401 intel_lvds->pfit_control = pfit_control;
402 intel_lvds->pfit_pgm_ratios = pfit_pgm_ratios;
403 intel_lvds->pfit_dirty = true;
405 dev_priv->lvds_border_bits = border;
408 * XXX: It would be nice to support lower refresh rates on the
409 * panels to reduce power consumption, and perhaps match the
410 * user's requested refresh rate.
416 static void intel_lvds_mode_set(struct drm_encoder *encoder,
417 struct drm_display_mode *mode,
418 struct drm_display_mode *adjusted_mode)
421 * The LVDS pin pair will already have been turned on in the
422 * intel_crtc_mode_set since it has a large impact on the DPLL
428 * Detect the LVDS connection.
430 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
431 * connected and closed means disconnected. We also send hotplug events as
432 * needed, using lid status notification from the input layer.
434 static enum drm_connector_status
435 intel_lvds_detect(struct drm_connector *connector, bool force)
437 struct drm_device *dev = connector->dev;
438 enum drm_connector_status status;
440 status = intel_panel_detect(dev);
441 if (status != connector_status_unknown)
444 return connector_status_connected;
448 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
450 static int intel_lvds_get_modes(struct drm_connector *connector)
452 struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
453 struct drm_device *dev = connector->dev;
454 struct drm_display_mode *mode;
456 if (intel_lvds->edid)
457 return drm_add_edid_modes(connector, intel_lvds->edid);
459 mode = drm_mode_duplicate(dev, intel_lvds->fixed_mode);
463 drm_mode_probed_add(connector, mode);
467 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
469 DRM_INFO("Skipping forced modeset for %s\n", id->ident);
473 /* The GPU hangs up on these systems if modeset is performed on LID open */
474 static const struct dmi_system_id intel_no_modeset_on_lid[] = {
476 .callback = intel_no_modeset_on_lid_dmi_callback,
477 .ident = "Toshiba Tecra A11",
479 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
480 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
484 { } /* terminating entry */
488 * Lid events. Note the use of 'modeset_on_lid':
489 * - we set it on lid close, and reset it on open
490 * - we use it as a "only once" bit (ie we ignore
491 * duplicate events where it was already properly
493 * - the suspend/resume paths will also set it to
494 * zero, since they restore the mode ("lid open").
496 static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
499 struct drm_i915_private *dev_priv =
500 container_of(nb, struct drm_i915_private, lid_notifier);
501 struct drm_device *dev = dev_priv->dev;
502 struct drm_connector *connector = dev_priv->int_lvds_connector;
504 if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
508 * check and update the status of LVDS connector after receiving
509 * the LID nofication event.
512 connector->status = connector->funcs->detect(connector,
515 /* Don't force modeset on machines where it causes a GPU lockup */
516 if (dmi_check_system(intel_no_modeset_on_lid))
518 if (!acpi_lid_open()) {
519 dev_priv->modeset_on_lid = 1;
523 if (!dev_priv->modeset_on_lid)
526 dev_priv->modeset_on_lid = 0;
528 mutex_lock(&dev->mode_config.mutex);
529 intel_modeset_check_state(dev);
530 mutex_unlock(&dev->mode_config.mutex);
536 * intel_lvds_destroy - unregister and free LVDS structures
537 * @connector: connector to free
539 * Unregister the DDC bus for this connector then free the driver private
542 static void intel_lvds_destroy(struct drm_connector *connector)
544 struct drm_device *dev = connector->dev;
545 struct drm_i915_private *dev_priv = dev->dev_private;
547 intel_panel_destroy_backlight(dev);
549 if (dev_priv->lid_notifier.notifier_call)
550 acpi_lid_notifier_unregister(&dev_priv->lid_notifier);
551 drm_sysfs_connector_remove(connector);
552 drm_connector_cleanup(connector);
556 static int intel_lvds_set_property(struct drm_connector *connector,
557 struct drm_property *property,
560 struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
561 struct drm_device *dev = connector->dev;
563 if (property == dev->mode_config.scaling_mode_property) {
564 struct drm_crtc *crtc = intel_lvds->base.base.crtc;
566 if (value == DRM_MODE_SCALE_NONE) {
567 DRM_DEBUG_KMS("no scaling not supported\n");
571 if (intel_lvds->fitting_mode == value) {
572 /* the LVDS scaling property is not changed */
575 intel_lvds->fitting_mode = value;
576 if (crtc && crtc->enabled) {
578 * If the CRTC is enabled, the display will be changed
579 * according to the new panel fitting mode.
581 intel_set_mode(crtc, &crtc->mode,
582 crtc->x, crtc->y, crtc->fb);
589 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
590 .mode_fixup = intel_lvds_mode_fixup,
591 .mode_set = intel_lvds_mode_set,
592 .disable = intel_encoder_noop,
595 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
596 .get_modes = intel_lvds_get_modes,
597 .mode_valid = intel_lvds_mode_valid,
598 .best_encoder = intel_best_encoder,
601 static const struct drm_connector_funcs intel_lvds_connector_funcs = {
602 .dpms = intel_connector_dpms,
603 .detect = intel_lvds_detect,
604 .fill_modes = drm_helper_probe_single_connector_modes,
605 .set_property = intel_lvds_set_property,
606 .destroy = intel_lvds_destroy,
609 static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
610 .destroy = intel_encoder_destroy,
613 static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
615 DRM_INFO("Skipping LVDS initialization for %s\n", id->ident);
619 /* These systems claim to have LVDS, but really don't */
620 static const struct dmi_system_id intel_no_lvds[] = {
622 .callback = intel_no_lvds_dmi_callback,
623 .ident = "Apple Mac Mini (Core series)",
625 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
626 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
630 .callback = intel_no_lvds_dmi_callback,
631 .ident = "Apple Mac Mini (Core 2 series)",
633 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
634 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
638 .callback = intel_no_lvds_dmi_callback,
639 .ident = "MSI IM-945GSE-A",
641 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
642 DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
646 .callback = intel_no_lvds_dmi_callback,
647 .ident = "Dell Studio Hybrid",
649 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
650 DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
654 .callback = intel_no_lvds_dmi_callback,
655 .ident = "Dell OptiPlex FX170",
657 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
658 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
662 .callback = intel_no_lvds_dmi_callback,
663 .ident = "AOpen Mini PC",
665 DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
666 DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
670 .callback = intel_no_lvds_dmi_callback,
671 .ident = "AOpen Mini PC MP915",
673 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
674 DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
678 .callback = intel_no_lvds_dmi_callback,
679 .ident = "AOpen i915GMm-HFS",
681 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
682 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
686 .callback = intel_no_lvds_dmi_callback,
687 .ident = "AOpen i45GMx-I",
689 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
690 DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
694 .callback = intel_no_lvds_dmi_callback,
695 .ident = "Aopen i945GTt-VFA",
697 DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
701 .callback = intel_no_lvds_dmi_callback,
702 .ident = "Clientron U800",
704 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
705 DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
709 .callback = intel_no_lvds_dmi_callback,
710 .ident = "Clientron E830",
712 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
713 DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
717 .callback = intel_no_lvds_dmi_callback,
718 .ident = "Asus EeeBox PC EB1007",
720 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
721 DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
725 .callback = intel_no_lvds_dmi_callback,
726 .ident = "Asus AT5NM10T-I",
728 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
729 DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
733 .callback = intel_no_lvds_dmi_callback,
734 .ident = "Hewlett-Packard HP t5740e Thin Client",
736 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
737 DMI_MATCH(DMI_PRODUCT_NAME, "HP t5740e Thin Client"),
741 .callback = intel_no_lvds_dmi_callback,
742 .ident = "Hewlett-Packard t5745",
744 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
745 DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
749 .callback = intel_no_lvds_dmi_callback,
750 .ident = "Hewlett-Packard st5747",
752 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
753 DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
757 .callback = intel_no_lvds_dmi_callback,
758 .ident = "MSI Wind Box DC500",
760 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
761 DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
765 .callback = intel_no_lvds_dmi_callback,
766 .ident = "ZOTAC ZBOXSD-ID12/ID13",
768 DMI_MATCH(DMI_BOARD_VENDOR, "ZOTAC"),
769 DMI_MATCH(DMI_BOARD_NAME, "ZBOXSD-ID12/ID13"),
773 .callback = intel_no_lvds_dmi_callback,
774 .ident = "Gigabyte GA-D525TUD",
776 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
777 DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
781 { } /* terminating entry */
785 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
787 * @connector: LVDS connector
789 * Find the reduced downclock for LVDS in EDID.
791 static void intel_find_lvds_downclock(struct drm_device *dev,
792 struct drm_display_mode *fixed_mode,
793 struct drm_connector *connector)
795 struct drm_i915_private *dev_priv = dev->dev_private;
796 struct drm_display_mode *scan;
799 temp_downclock = fixed_mode->clock;
800 list_for_each_entry(scan, &connector->probed_modes, head) {
802 * If one mode has the same resolution with the fixed_panel
803 * mode while they have the different refresh rate, it means
804 * that the reduced downclock is found for the LVDS. In such
805 * case we can set the different FPx0/1 to dynamically select
806 * between low and high frequency.
808 if (scan->hdisplay == fixed_mode->hdisplay &&
809 scan->hsync_start == fixed_mode->hsync_start &&
810 scan->hsync_end == fixed_mode->hsync_end &&
811 scan->htotal == fixed_mode->htotal &&
812 scan->vdisplay == fixed_mode->vdisplay &&
813 scan->vsync_start == fixed_mode->vsync_start &&
814 scan->vsync_end == fixed_mode->vsync_end &&
815 scan->vtotal == fixed_mode->vtotal) {
816 if (scan->clock < temp_downclock) {
818 * The downclock is already found. But we
819 * expect to find the lower downclock.
821 temp_downclock = scan->clock;
825 if (temp_downclock < fixed_mode->clock && i915_lvds_downclock) {
826 /* We found the downclock for LVDS. */
827 dev_priv->lvds_downclock_avail = 1;
828 dev_priv->lvds_downclock = temp_downclock;
829 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
830 "Normal clock %dKhz, downclock %dKhz\n",
831 fixed_mode->clock, temp_downclock);
836 * Enumerate the child dev array parsed from VBT to check whether
837 * the LVDS is present.
838 * If it is present, return 1.
839 * If it is not present, return false.
840 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
842 static bool lvds_is_present_in_vbt(struct drm_device *dev,
845 struct drm_i915_private *dev_priv = dev->dev_private;
848 if (!dev_priv->child_dev_num)
851 for (i = 0; i < dev_priv->child_dev_num; i++) {
852 struct child_device_config *child = dev_priv->child_dev + i;
854 /* If the device type is not LFP, continue.
855 * We have to check both the new identifiers as well as the
856 * old for compatibility with some BIOSes.
858 if (child->device_type != DEVICE_TYPE_INT_LFP &&
859 child->device_type != DEVICE_TYPE_LFP)
862 if (intel_gmbus_is_port_valid(child->i2c_pin))
863 *i2c_pin = child->i2c_pin;
865 /* However, we cannot trust the BIOS writers to populate
866 * the VBT correctly. Since LVDS requires additional
867 * information from AIM blocks, a non-zero addin offset is
868 * a good indicator that the LVDS is actually present.
870 if (child->addin_offset)
873 /* But even then some BIOS writers perform some black magic
874 * and instantiate the device without reference to any
875 * additional data. Trust that if the VBT was written into
876 * the OpRegion then they have validated the LVDS's existence.
878 if (dev_priv->opregion.vbt)
885 static bool intel_lvds_supported(struct drm_device *dev)
887 /* With the introduction of the PCH we gained a dedicated
888 * LVDS presence pin, use it. */
889 if (HAS_PCH_SPLIT(dev))
892 /* Otherwise LVDS was only attached to mobile products,
893 * except for the inglorious 830gm */
894 return IS_MOBILE(dev) && !IS_I830(dev);
898 * intel_lvds_init - setup LVDS connectors on this device
901 * Create the connector, register the LVDS DDC bus, and try to figure out what
902 * modes we can display on the LVDS panel (if present).
904 bool intel_lvds_init(struct drm_device *dev)
906 struct drm_i915_private *dev_priv = dev->dev_private;
907 struct intel_lvds *intel_lvds;
908 struct intel_encoder *intel_encoder;
909 struct intel_connector *intel_connector;
910 struct drm_connector *connector;
911 struct drm_encoder *encoder;
912 struct drm_display_mode *scan; /* *modes, *bios_mode; */
913 struct drm_crtc *crtc;
918 if (!intel_lvds_supported(dev))
921 /* Skip init on machines we know falsely report LVDS */
922 if (dmi_check_system(intel_no_lvds))
925 pin = GMBUS_PORT_PANEL;
926 if (!lvds_is_present_in_vbt(dev, &pin)) {
927 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
931 if (HAS_PCH_SPLIT(dev)) {
932 if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
934 if (dev_priv->edp.support) {
935 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
940 intel_lvds = kzalloc(sizeof(struct intel_lvds), GFP_KERNEL);
945 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
946 if (!intel_connector) {
951 if (!HAS_PCH_SPLIT(dev)) {
952 intel_lvds->pfit_control = I915_READ(PFIT_CONTROL);
955 intel_encoder = &intel_lvds->base;
956 encoder = &intel_encoder->base;
957 connector = &intel_connector->base;
958 drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
959 DRM_MODE_CONNECTOR_LVDS);
961 drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
962 DRM_MODE_ENCODER_LVDS);
964 intel_encoder->enable = intel_enable_lvds;
965 intel_encoder->disable = intel_disable_lvds;
966 intel_encoder->get_hw_state = intel_lvds_get_hw_state;
967 intel_connector->get_hw_state = intel_connector_get_hw_state;
969 intel_connector_attach_encoder(intel_connector, intel_encoder);
970 intel_encoder->type = INTEL_OUTPUT_LVDS;
972 intel_encoder->cloneable = false;
973 if (HAS_PCH_SPLIT(dev))
974 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
975 else if (IS_GEN4(dev))
976 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
978 intel_encoder->crtc_mask = (1 << 1);
980 drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
981 drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
982 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
983 connector->interlace_allowed = false;
984 connector->doublescan_allowed = false;
986 /* create the scaling mode property */
987 drm_mode_create_scaling_mode_property(dev);
989 * the initial panel fitting mode will be FULL_SCREEN.
992 drm_connector_attach_property(&intel_connector->base,
993 dev->mode_config.scaling_mode_property,
994 DRM_MODE_SCALE_ASPECT);
995 intel_lvds->fitting_mode = DRM_MODE_SCALE_ASPECT;
998 * 1) check for EDID on DDC
999 * 2) check for VBT data
1000 * 3) check to see if LVDS is already on
1001 * if none of the above, no panel
1002 * 4) make sure lid is open
1003 * if closed, act like it's not there for now
1007 * Attempt to get the fixed panel mode from DDC. Assume that the
1008 * preferred mode is the right one.
1010 intel_lvds->edid = drm_get_edid(connector,
1011 intel_gmbus_get_adapter(dev_priv,
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)
1085 * Unlock registers and just
1086 * leave them unlocked
1088 if (HAS_PCH_SPLIT(dev)) {
1089 I915_WRITE(PCH_PP_CONTROL,
1090 I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
1092 I915_WRITE(PP_CONTROL,
1093 I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
1095 dev_priv->lid_notifier.notifier_call = intel_lid_notify;
1096 if (acpi_lid_notifier_register(&dev_priv->lid_notifier)) {
1097 DRM_DEBUG_KMS("lid notifier registration failed\n");
1098 dev_priv->lid_notifier.notifier_call = NULL;
1100 /* keep the LVDS connector */
1101 dev_priv->int_lvds_connector = connector;
1102 drm_sysfs_connector_add(connector);
1104 intel_panel_setup_backlight(dev);
1109 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1110 drm_connector_cleanup(connector);
1111 drm_encoder_cleanup(encoder);
1113 kfree(intel_connector);