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 */
43 struct intel_lvds_connector {
44 struct intel_connector base;
46 struct notifier_block lid_notifier;
49 struct intel_lvds_encoder {
50 struct intel_encoder base;
59 struct drm_display_mode *fixed_mode;
62 static struct intel_lvds_encoder *to_lvds_encoder(struct drm_encoder *encoder)
64 return container_of(encoder, struct intel_lvds_encoder, base.base);
67 static struct intel_lvds_connector *to_lvds_connector(struct drm_connector *connector)
69 return container_of(connector, struct intel_lvds_connector, base.base);
72 static struct intel_lvds_encoder *intel_attached_lvds(struct drm_connector *connector)
74 return container_of(intel_attached_encoder(connector),
75 struct intel_lvds_encoder, base);
78 static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
81 struct drm_device *dev = encoder->base.dev;
82 struct drm_i915_private *dev_priv = dev->dev_private;
85 if (HAS_PCH_SPLIT(dev)) {
91 tmp = I915_READ(lvds_reg);
93 if (!(tmp & LVDS_PORT_EN))
97 *pipe = PORT_TO_PIPE_CPT(tmp);
99 *pipe = PORT_TO_PIPE(tmp);
105 * Sets the power state for the panel.
107 static void intel_enable_lvds(struct intel_encoder *encoder)
109 struct drm_device *dev = encoder->base.dev;
110 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
111 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
112 struct drm_i915_private *dev_priv = dev->dev_private;
113 u32 ctl_reg, lvds_reg, stat_reg;
115 if (HAS_PCH_SPLIT(dev)) {
116 ctl_reg = PCH_PP_CONTROL;
118 stat_reg = PCH_PP_STATUS;
120 ctl_reg = PP_CONTROL;
122 stat_reg = PP_STATUS;
125 I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);
127 if (lvds_encoder->pfit_dirty) {
129 * Enable automatic panel scaling so that non-native modes
130 * fill the screen. The panel fitter should only be
131 * adjusted whilst the pipe is disabled, according to
132 * register description and PRM.
134 DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
135 lvds_encoder->pfit_control,
136 lvds_encoder->pfit_pgm_ratios);
138 I915_WRITE(PFIT_PGM_RATIOS, lvds_encoder->pfit_pgm_ratios);
139 I915_WRITE(PFIT_CONTROL, lvds_encoder->pfit_control);
140 lvds_encoder->pfit_dirty = false;
143 I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
144 POSTING_READ(lvds_reg);
145 if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
146 DRM_ERROR("timed out waiting for panel to power on\n");
148 intel_panel_enable_backlight(dev, intel_crtc->pipe);
151 static void intel_disable_lvds(struct intel_encoder *encoder)
153 struct drm_device *dev = encoder->base.dev;
154 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
155 struct drm_i915_private *dev_priv = dev->dev_private;
156 u32 ctl_reg, lvds_reg, stat_reg;
158 if (HAS_PCH_SPLIT(dev)) {
159 ctl_reg = PCH_PP_CONTROL;
161 stat_reg = PCH_PP_STATUS;
163 ctl_reg = PP_CONTROL;
165 stat_reg = PP_STATUS;
168 intel_panel_disable_backlight(dev);
170 I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
171 if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000))
172 DRM_ERROR("timed out waiting for panel to power off\n");
174 if (lvds_encoder->pfit_control) {
175 I915_WRITE(PFIT_CONTROL, 0);
176 lvds_encoder->pfit_dirty = true;
179 I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
180 POSTING_READ(lvds_reg);
183 static int intel_lvds_mode_valid(struct drm_connector *connector,
184 struct drm_display_mode *mode)
186 struct intel_lvds_encoder *lvds_encoder = intel_attached_lvds(connector);
187 struct drm_display_mode *fixed_mode = lvds_encoder->fixed_mode;
189 if (mode->hdisplay > fixed_mode->hdisplay)
191 if (mode->vdisplay > fixed_mode->vdisplay)
198 centre_horizontally(struct drm_display_mode *mode,
201 u32 border, sync_pos, blank_width, sync_width;
203 /* keep the hsync and hblank widths constant */
204 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
205 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
206 sync_pos = (blank_width - sync_width + 1) / 2;
208 border = (mode->hdisplay - width + 1) / 2;
209 border += border & 1; /* make the border even */
211 mode->crtc_hdisplay = width;
212 mode->crtc_hblank_start = width + border;
213 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
215 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
216 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
218 mode->private_flags |= INTEL_MODE_CRTC_TIMINGS_SET;
222 centre_vertically(struct drm_display_mode *mode,
225 u32 border, sync_pos, blank_width, sync_width;
227 /* keep the vsync and vblank widths constant */
228 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
229 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
230 sync_pos = (blank_width - sync_width + 1) / 2;
232 border = (mode->vdisplay - height + 1) / 2;
234 mode->crtc_vdisplay = height;
235 mode->crtc_vblank_start = height + border;
236 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
238 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
239 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
241 mode->private_flags |= INTEL_MODE_CRTC_TIMINGS_SET;
244 static inline u32 panel_fitter_scaling(u32 source, u32 target)
247 * Floating point operation is not supported. So the FACTOR
248 * is defined, which can avoid the floating point computation
249 * when calculating the panel ratio.
252 #define FACTOR (1 << ACCURACY)
253 u32 ratio = source * FACTOR / target;
254 return (FACTOR * ratio + FACTOR/2) / FACTOR;
257 static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
258 const struct drm_display_mode *mode,
259 struct drm_display_mode *adjusted_mode)
261 struct drm_device *dev = encoder->dev;
262 struct drm_i915_private *dev_priv = dev->dev_private;
263 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
264 struct intel_crtc *intel_crtc = lvds_encoder->base.new_crtc;
265 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
268 /* Should never happen!! */
269 if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
270 DRM_ERROR("Can't support LVDS on pipe A\n");
274 if (intel_encoder_check_is_cloned(&lvds_encoder->base))
278 * We have timings from the BIOS for the panel, put them in
279 * to the adjusted mode. The CRTC will be set up for this mode,
280 * with the panel scaling set up to source from the H/VDisplay
281 * of the original mode.
283 intel_fixed_panel_mode(lvds_encoder->fixed_mode, adjusted_mode);
285 if (HAS_PCH_SPLIT(dev)) {
286 intel_pch_panel_fitting(dev, lvds_encoder->fitting_mode,
287 mode, adjusted_mode);
291 /* Native modes don't need fitting */
292 if (adjusted_mode->hdisplay == mode->hdisplay &&
293 adjusted_mode->vdisplay == mode->vdisplay)
296 /* 965+ wants fuzzy fitting */
297 if (INTEL_INFO(dev)->gen >= 4)
298 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
302 * Enable automatic panel scaling for non-native modes so that they fill
303 * the screen. Should be enabled before the pipe is enabled, according
304 * to register description and PRM.
305 * Change the value here to see the borders for debugging
308 I915_WRITE(BCLRPAT(pipe), 0);
310 drm_mode_set_crtcinfo(adjusted_mode, 0);
312 switch (lvds_encoder->fitting_mode) {
313 case DRM_MODE_SCALE_CENTER:
315 * For centered modes, we have to calculate border widths &
316 * heights and modify the values programmed into the CRTC.
318 centre_horizontally(adjusted_mode, mode->hdisplay);
319 centre_vertically(adjusted_mode, mode->vdisplay);
320 border = LVDS_BORDER_ENABLE;
323 case DRM_MODE_SCALE_ASPECT:
324 /* Scale but preserve the aspect ratio */
325 if (INTEL_INFO(dev)->gen >= 4) {
326 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
327 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
329 /* 965+ is easy, it does everything in hw */
330 if (scaled_width > scaled_height)
331 pfit_control |= PFIT_ENABLE | PFIT_SCALING_PILLAR;
332 else if (scaled_width < scaled_height)
333 pfit_control |= PFIT_ENABLE | PFIT_SCALING_LETTER;
334 else if (adjusted_mode->hdisplay != mode->hdisplay)
335 pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
337 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
338 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
340 * For earlier chips we have to calculate the scaling
341 * ratio by hand and program it into the
342 * PFIT_PGM_RATIO register
344 if (scaled_width > scaled_height) { /* pillar */
345 centre_horizontally(adjusted_mode, scaled_height / mode->vdisplay);
347 border = LVDS_BORDER_ENABLE;
348 if (mode->vdisplay != adjusted_mode->vdisplay) {
349 u32 bits = panel_fitter_scaling(mode->vdisplay, adjusted_mode->vdisplay);
350 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
351 bits << PFIT_VERT_SCALE_SHIFT);
352 pfit_control |= (PFIT_ENABLE |
353 VERT_INTERP_BILINEAR |
354 HORIZ_INTERP_BILINEAR);
356 } else if (scaled_width < scaled_height) { /* letter */
357 centre_vertically(adjusted_mode, scaled_width / mode->hdisplay);
359 border = LVDS_BORDER_ENABLE;
360 if (mode->hdisplay != adjusted_mode->hdisplay) {
361 u32 bits = panel_fitter_scaling(mode->hdisplay, adjusted_mode->hdisplay);
362 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
363 bits << PFIT_VERT_SCALE_SHIFT);
364 pfit_control |= (PFIT_ENABLE |
365 VERT_INTERP_BILINEAR |
366 HORIZ_INTERP_BILINEAR);
369 /* Aspects match, Let hw scale both directions */
370 pfit_control |= (PFIT_ENABLE |
371 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
372 VERT_INTERP_BILINEAR |
373 HORIZ_INTERP_BILINEAR);
377 case DRM_MODE_SCALE_FULLSCREEN:
379 * Full scaling, even if it changes the aspect ratio.
380 * Fortunately this is all done for us in hw.
382 if (mode->vdisplay != adjusted_mode->vdisplay ||
383 mode->hdisplay != adjusted_mode->hdisplay) {
384 pfit_control |= PFIT_ENABLE;
385 if (INTEL_INFO(dev)->gen >= 4)
386 pfit_control |= PFIT_SCALING_AUTO;
388 pfit_control |= (VERT_AUTO_SCALE |
389 VERT_INTERP_BILINEAR |
391 HORIZ_INTERP_BILINEAR);
400 /* If not enabling scaling, be consistent and always use 0. */
401 if ((pfit_control & PFIT_ENABLE) == 0) {
406 /* Make sure pre-965 set dither correctly */
407 if (INTEL_INFO(dev)->gen < 4 && dev_priv->lvds_dither)
408 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
410 if (pfit_control != lvds_encoder->pfit_control ||
411 pfit_pgm_ratios != lvds_encoder->pfit_pgm_ratios) {
412 lvds_encoder->pfit_control = pfit_control;
413 lvds_encoder->pfit_pgm_ratios = pfit_pgm_ratios;
414 lvds_encoder->pfit_dirty = true;
416 dev_priv->lvds_border_bits = border;
419 * XXX: It would be nice to support lower refresh rates on the
420 * panels to reduce power consumption, and perhaps match the
421 * user's requested refresh rate.
427 static void intel_lvds_mode_set(struct drm_encoder *encoder,
428 struct drm_display_mode *mode,
429 struct drm_display_mode *adjusted_mode)
432 * The LVDS pin pair will already have been turned on in the
433 * intel_crtc_mode_set since it has a large impact on the DPLL
439 * Detect the LVDS connection.
441 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
442 * connected and closed means disconnected. We also send hotplug events as
443 * needed, using lid status notification from the input layer.
445 static enum drm_connector_status
446 intel_lvds_detect(struct drm_connector *connector, bool force)
448 struct drm_device *dev = connector->dev;
449 enum drm_connector_status status;
451 status = intel_panel_detect(dev);
452 if (status != connector_status_unknown)
455 return connector_status_connected;
459 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
461 static int intel_lvds_get_modes(struct drm_connector *connector)
463 struct intel_lvds_encoder *lvds_encoder = intel_attached_lvds(connector);
464 struct drm_device *dev = connector->dev;
465 struct drm_display_mode *mode;
467 if (lvds_encoder->edid)
468 return drm_add_edid_modes(connector, lvds_encoder->edid);
470 mode = drm_mode_duplicate(dev, lvds_encoder->fixed_mode);
474 drm_mode_probed_add(connector, mode);
478 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
480 DRM_INFO("Skipping forced modeset for %s\n", id->ident);
484 /* The GPU hangs up on these systems if modeset is performed on LID open */
485 static const struct dmi_system_id intel_no_modeset_on_lid[] = {
487 .callback = intel_no_modeset_on_lid_dmi_callback,
488 .ident = "Toshiba Tecra A11",
490 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
491 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
495 { } /* terminating entry */
499 * Lid events. Note the use of 'modeset_on_lid':
500 * - we set it on lid close, and reset it on open
501 * - we use it as a "only once" bit (ie we ignore
502 * duplicate events where it was already properly
504 * - the suspend/resume paths will also set it to
505 * zero, since they restore the mode ("lid open").
507 static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
510 struct intel_lvds_connector *lvds_connector =
511 container_of(nb, struct intel_lvds_connector, lid_notifier);
512 struct drm_connector *connector = &lvds_connector->base.base;
513 struct drm_device *dev = connector->dev;
514 struct drm_i915_private *dev_priv = dev->dev_private;
516 if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
520 * check and update the status of LVDS connector after receiving
521 * the LID nofication event.
523 connector->status = connector->funcs->detect(connector, false);
525 /* Don't force modeset on machines where it causes a GPU lockup */
526 if (dmi_check_system(intel_no_modeset_on_lid))
528 if (!acpi_lid_open()) {
529 dev_priv->modeset_on_lid = 1;
533 if (!dev_priv->modeset_on_lid)
536 dev_priv->modeset_on_lid = 0;
538 mutex_lock(&dev->mode_config.mutex);
539 intel_modeset_check_state(dev);
540 mutex_unlock(&dev->mode_config.mutex);
546 * intel_lvds_destroy - unregister and free LVDS structures
547 * @connector: connector to free
549 * Unregister the DDC bus for this connector then free the driver private
552 static void intel_lvds_destroy(struct drm_connector *connector)
554 struct intel_lvds_connector *lvds_connector =
555 to_lvds_connector(connector);
557 if (lvds_connector->lid_notifier.notifier_call)
558 acpi_lid_notifier_unregister(&lvds_connector->lid_notifier);
560 intel_panel_destroy_backlight(connector->dev);
562 drm_sysfs_connector_remove(connector);
563 drm_connector_cleanup(connector);
567 static int intel_lvds_set_property(struct drm_connector *connector,
568 struct drm_property *property,
571 struct intel_lvds_encoder *lvds_encoder = intel_attached_lvds(connector);
572 struct drm_device *dev = connector->dev;
574 if (property == dev->mode_config.scaling_mode_property) {
575 struct drm_crtc *crtc = lvds_encoder->base.base.crtc;
577 if (value == DRM_MODE_SCALE_NONE) {
578 DRM_DEBUG_KMS("no scaling not supported\n");
582 if (lvds_encoder->fitting_mode == value) {
583 /* the LVDS scaling property is not changed */
586 lvds_encoder->fitting_mode = value;
587 if (crtc && crtc->enabled) {
589 * If the CRTC is enabled, the display will be changed
590 * according to the new panel fitting mode.
592 intel_set_mode(crtc, &crtc->mode,
593 crtc->x, crtc->y, crtc->fb);
600 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
601 .mode_fixup = intel_lvds_mode_fixup,
602 .mode_set = intel_lvds_mode_set,
603 .disable = intel_encoder_noop,
606 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
607 .get_modes = intel_lvds_get_modes,
608 .mode_valid = intel_lvds_mode_valid,
609 .best_encoder = intel_best_encoder,
612 static const struct drm_connector_funcs intel_lvds_connector_funcs = {
613 .dpms = intel_connector_dpms,
614 .detect = intel_lvds_detect,
615 .fill_modes = drm_helper_probe_single_connector_modes,
616 .set_property = intel_lvds_set_property,
617 .destroy = intel_lvds_destroy,
620 static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
621 .destroy = intel_encoder_destroy,
624 static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
626 DRM_INFO("Skipping LVDS initialization for %s\n", id->ident);
630 /* These systems claim to have LVDS, but really don't */
631 static const struct dmi_system_id intel_no_lvds[] = {
633 .callback = intel_no_lvds_dmi_callback,
634 .ident = "Apple Mac Mini (Core series)",
636 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
637 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
641 .callback = intel_no_lvds_dmi_callback,
642 .ident = "Apple Mac Mini (Core 2 series)",
644 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
645 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
649 .callback = intel_no_lvds_dmi_callback,
650 .ident = "MSI IM-945GSE-A",
652 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
653 DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
657 .callback = intel_no_lvds_dmi_callback,
658 .ident = "Dell Studio Hybrid",
660 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
661 DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
665 .callback = intel_no_lvds_dmi_callback,
666 .ident = "Dell OptiPlex FX170",
668 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
669 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
673 .callback = intel_no_lvds_dmi_callback,
674 .ident = "AOpen Mini PC",
676 DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
677 DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
681 .callback = intel_no_lvds_dmi_callback,
682 .ident = "AOpen Mini PC MP915",
684 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
685 DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
689 .callback = intel_no_lvds_dmi_callback,
690 .ident = "AOpen i915GMm-HFS",
692 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
693 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
697 .callback = intel_no_lvds_dmi_callback,
698 .ident = "AOpen i45GMx-I",
700 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
701 DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
705 .callback = intel_no_lvds_dmi_callback,
706 .ident = "Aopen i945GTt-VFA",
708 DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
712 .callback = intel_no_lvds_dmi_callback,
713 .ident = "Clientron U800",
715 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
716 DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
720 .callback = intel_no_lvds_dmi_callback,
721 .ident = "Clientron E830",
723 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
724 DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
728 .callback = intel_no_lvds_dmi_callback,
729 .ident = "Asus EeeBox PC EB1007",
731 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
732 DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
736 .callback = intel_no_lvds_dmi_callback,
737 .ident = "Asus AT5NM10T-I",
739 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
740 DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
744 .callback = intel_no_lvds_dmi_callback,
745 .ident = "Hewlett-Packard HP t5740e Thin Client",
747 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
748 DMI_MATCH(DMI_PRODUCT_NAME, "HP t5740e Thin Client"),
752 .callback = intel_no_lvds_dmi_callback,
753 .ident = "Hewlett-Packard t5745",
755 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
756 DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
760 .callback = intel_no_lvds_dmi_callback,
761 .ident = "Hewlett-Packard st5747",
763 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
764 DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
768 .callback = intel_no_lvds_dmi_callback,
769 .ident = "MSI Wind Box DC500",
771 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
772 DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
776 .callback = intel_no_lvds_dmi_callback,
777 .ident = "ZOTAC ZBOXSD-ID12/ID13",
779 DMI_MATCH(DMI_BOARD_VENDOR, "ZOTAC"),
780 DMI_MATCH(DMI_BOARD_NAME, "ZBOXSD-ID12/ID13"),
784 .callback = intel_no_lvds_dmi_callback,
785 .ident = "Gigabyte GA-D525TUD",
787 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
788 DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
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)
873 if (intel_gmbus_is_port_valid(child->i2c_pin))
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)
896 static bool intel_lvds_supported(struct drm_device *dev)
898 /* With the introduction of the PCH we gained a dedicated
899 * LVDS presence pin, use it. */
900 if (HAS_PCH_SPLIT(dev))
903 /* Otherwise LVDS was only attached to mobile products,
904 * except for the inglorious 830gm */
905 return IS_MOBILE(dev) && !IS_I830(dev);
909 * intel_lvds_init - setup LVDS connectors on this device
912 * Create the connector, register the LVDS DDC bus, and try to figure out what
913 * modes we can display on the LVDS panel (if present).
915 bool intel_lvds_init(struct drm_device *dev)
917 struct drm_i915_private *dev_priv = dev->dev_private;
918 struct intel_lvds_encoder *lvds_encoder;
919 struct intel_encoder *intel_encoder;
920 struct intel_lvds_connector *lvds_connector;
921 struct intel_connector *intel_connector;
922 struct drm_connector *connector;
923 struct drm_encoder *encoder;
924 struct drm_display_mode *scan; /* *modes, *bios_mode; */
925 struct drm_crtc *crtc;
930 if (!intel_lvds_supported(dev))
933 /* Skip init on machines we know falsely report LVDS */
934 if (dmi_check_system(intel_no_lvds))
937 pin = GMBUS_PORT_PANEL;
938 if (!lvds_is_present_in_vbt(dev, &pin)) {
939 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
943 if (HAS_PCH_SPLIT(dev)) {
944 if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
946 if (dev_priv->edp.support) {
947 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
952 lvds_encoder = kzalloc(sizeof(struct intel_lvds_encoder), GFP_KERNEL);
956 lvds_connector = kzalloc(sizeof(struct intel_lvds_connector), GFP_KERNEL);
957 if (!lvds_connector) {
962 if (!HAS_PCH_SPLIT(dev)) {
963 lvds_encoder->pfit_control = I915_READ(PFIT_CONTROL);
966 intel_encoder = &lvds_encoder->base;
967 encoder = &intel_encoder->base;
968 intel_connector = &lvds_connector->base;
969 connector = &intel_connector->base;
970 drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
971 DRM_MODE_CONNECTOR_LVDS);
973 drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
974 DRM_MODE_ENCODER_LVDS);
976 intel_encoder->enable = intel_enable_lvds;
977 intel_encoder->disable = intel_disable_lvds;
978 intel_encoder->get_hw_state = intel_lvds_get_hw_state;
979 intel_connector->get_hw_state = intel_connector_get_hw_state;
981 intel_connector_attach_encoder(intel_connector, intel_encoder);
982 intel_encoder->type = INTEL_OUTPUT_LVDS;
984 intel_encoder->cloneable = false;
985 if (HAS_PCH_SPLIT(dev))
986 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
987 else if (IS_GEN4(dev))
988 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
990 intel_encoder->crtc_mask = (1 << 1);
992 drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
993 drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
994 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
995 connector->interlace_allowed = false;
996 connector->doublescan_allowed = false;
998 /* create the scaling mode property */
999 drm_mode_create_scaling_mode_property(dev);
1001 * the initial panel fitting mode will be FULL_SCREEN.
1004 drm_connector_attach_property(&intel_connector->base,
1005 dev->mode_config.scaling_mode_property,
1006 DRM_MODE_SCALE_ASPECT);
1007 lvds_encoder->fitting_mode = DRM_MODE_SCALE_ASPECT;
1010 * 1) check for EDID on DDC
1011 * 2) check for VBT data
1012 * 3) check to see if LVDS is already on
1013 * if none of the above, no panel
1014 * 4) make sure lid is open
1015 * if closed, act like it's not there for now
1019 * Attempt to get the fixed panel mode from DDC. Assume that the
1020 * preferred mode is the right one.
1022 lvds_encoder->edid = drm_get_edid(connector,
1023 intel_gmbus_get_adapter(dev_priv, pin));
1024 if (lvds_encoder->edid) {
1025 if (drm_add_edid_modes(connector, lvds_encoder->edid)) {
1026 drm_mode_connector_update_edid_property(connector,
1027 lvds_encoder->edid);
1029 kfree(lvds_encoder->edid);
1030 lvds_encoder->edid = NULL;
1033 if (!lvds_encoder->edid) {
1034 /* Didn't get an EDID, so
1035 * Set wide sync ranges so we get all modes
1036 * handed to valid_mode for checking
1038 connector->display_info.min_vfreq = 0;
1039 connector->display_info.max_vfreq = 200;
1040 connector->display_info.min_hfreq = 0;
1041 connector->display_info.max_hfreq = 200;
1044 list_for_each_entry(scan, &connector->probed_modes, head) {
1045 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
1046 lvds_encoder->fixed_mode = drm_mode_duplicate(dev, scan);
1047 intel_find_lvds_downclock(dev, lvds_encoder->fixed_mode,
1053 /* Failed to get EDID, what about VBT? */
1054 if (dev_priv->lfp_lvds_vbt_mode) {
1055 lvds_encoder->fixed_mode =
1056 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
1057 if (lvds_encoder->fixed_mode) {
1058 lvds_encoder->fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1064 * If we didn't get EDID, try checking if the panel is already turned
1065 * on. If so, assume that whatever is currently programmed is the
1069 /* Ironlake: FIXME if still fail, not try pipe mode now */
1070 if (HAS_PCH_SPLIT(dev))
1073 lvds = I915_READ(LVDS);
1074 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
1075 crtc = intel_get_crtc_for_pipe(dev, pipe);
1077 if (crtc && (lvds & LVDS_PORT_EN)) {
1078 lvds_encoder->fixed_mode = intel_crtc_mode_get(dev, crtc);
1079 if (lvds_encoder->fixed_mode) {
1080 lvds_encoder->fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1085 /* If we still don't have a mode after all that, give up. */
1086 if (!lvds_encoder->fixed_mode)
1091 * Unlock registers and just
1092 * leave them unlocked
1094 if (HAS_PCH_SPLIT(dev)) {
1095 I915_WRITE(PCH_PP_CONTROL,
1096 I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
1098 I915_WRITE(PP_CONTROL,
1099 I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
1101 lvds_connector->lid_notifier.notifier_call = intel_lid_notify;
1102 if (acpi_lid_notifier_register(&lvds_connector->lid_notifier)) {
1103 DRM_DEBUG_KMS("lid notifier registration failed\n");
1104 lvds_connector->lid_notifier.notifier_call = NULL;
1106 /* keep the LVDS connector */
1107 dev_priv->int_lvds_connector = connector;
1108 drm_sysfs_connector_add(connector);
1110 intel_panel_setup_backlight(dev);
1115 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1116 drm_connector_cleanup(connector);
1117 drm_encoder_cleanup(encoder);
1118 kfree(lvds_encoder);
1119 kfree(lvds_connector);