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;
56 struct intel_lvds_connector *attached_connector;
59 static struct intel_lvds_encoder *to_lvds_encoder(struct drm_encoder *encoder)
61 return container_of(encoder, struct intel_lvds_encoder, base.base);
64 static struct intel_lvds_connector *to_lvds_connector(struct drm_connector *connector)
66 return container_of(connector, struct intel_lvds_connector, base.base);
69 static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
72 struct drm_device *dev = encoder->base.dev;
73 struct drm_i915_private *dev_priv = dev->dev_private;
76 if (HAS_PCH_SPLIT(dev)) {
82 tmp = I915_READ(lvds_reg);
84 if (!(tmp & LVDS_PORT_EN))
88 *pipe = PORT_TO_PIPE_CPT(tmp);
90 *pipe = PORT_TO_PIPE(tmp);
96 * Sets the power state for the panel.
98 static void intel_enable_lvds(struct intel_encoder *encoder)
100 struct drm_device *dev = encoder->base.dev;
101 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
102 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
103 struct drm_i915_private *dev_priv = dev->dev_private;
104 u32 ctl_reg, lvds_reg, stat_reg;
106 if (HAS_PCH_SPLIT(dev)) {
107 ctl_reg = PCH_PP_CONTROL;
109 stat_reg = PCH_PP_STATUS;
111 ctl_reg = PP_CONTROL;
113 stat_reg = PP_STATUS;
116 I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);
118 if (lvds_encoder->pfit_dirty) {
120 * Enable automatic panel scaling so that non-native modes
121 * fill the screen. The panel fitter should only be
122 * adjusted whilst the pipe is disabled, according to
123 * register description and PRM.
125 DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
126 lvds_encoder->pfit_control,
127 lvds_encoder->pfit_pgm_ratios);
129 I915_WRITE(PFIT_PGM_RATIOS, lvds_encoder->pfit_pgm_ratios);
130 I915_WRITE(PFIT_CONTROL, lvds_encoder->pfit_control);
131 lvds_encoder->pfit_dirty = false;
134 I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
135 POSTING_READ(lvds_reg);
136 if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
137 DRM_ERROR("timed out waiting for panel to power on\n");
139 intel_panel_enable_backlight(dev, intel_crtc->pipe);
142 static void intel_disable_lvds(struct intel_encoder *encoder)
144 struct drm_device *dev = encoder->base.dev;
145 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
146 struct drm_i915_private *dev_priv = dev->dev_private;
147 u32 ctl_reg, lvds_reg, stat_reg;
149 if (HAS_PCH_SPLIT(dev)) {
150 ctl_reg = PCH_PP_CONTROL;
152 stat_reg = PCH_PP_STATUS;
154 ctl_reg = PP_CONTROL;
156 stat_reg = PP_STATUS;
159 intel_panel_disable_backlight(dev);
161 I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
162 if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000))
163 DRM_ERROR("timed out waiting for panel to power off\n");
165 if (lvds_encoder->pfit_control) {
166 I915_WRITE(PFIT_CONTROL, 0);
167 lvds_encoder->pfit_dirty = true;
170 I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
171 POSTING_READ(lvds_reg);
174 static int intel_lvds_mode_valid(struct drm_connector *connector,
175 struct drm_display_mode *mode)
177 struct intel_connector *intel_connector = to_intel_connector(connector);
178 struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
180 if (mode->hdisplay > fixed_mode->hdisplay)
182 if (mode->vdisplay > fixed_mode->vdisplay)
189 centre_horizontally(struct drm_display_mode *mode,
192 u32 border, sync_pos, blank_width, sync_width;
194 /* keep the hsync and hblank widths constant */
195 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
196 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
197 sync_pos = (blank_width - sync_width + 1) / 2;
199 border = (mode->hdisplay - width + 1) / 2;
200 border += border & 1; /* make the border even */
202 mode->crtc_hdisplay = width;
203 mode->crtc_hblank_start = width + border;
204 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
206 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
207 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
209 mode->private_flags |= INTEL_MODE_CRTC_TIMINGS_SET;
213 centre_vertically(struct drm_display_mode *mode,
216 u32 border, sync_pos, blank_width, sync_width;
218 /* keep the vsync and vblank widths constant */
219 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
220 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
221 sync_pos = (blank_width - sync_width + 1) / 2;
223 border = (mode->vdisplay - height + 1) / 2;
225 mode->crtc_vdisplay = height;
226 mode->crtc_vblank_start = height + border;
227 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
229 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
230 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
232 mode->private_flags |= INTEL_MODE_CRTC_TIMINGS_SET;
235 static inline u32 panel_fitter_scaling(u32 source, u32 target)
238 * Floating point operation is not supported. So the FACTOR
239 * is defined, which can avoid the floating point computation
240 * when calculating the panel ratio.
243 #define FACTOR (1 << ACCURACY)
244 u32 ratio = source * FACTOR / target;
245 return (FACTOR * ratio + FACTOR/2) / FACTOR;
248 static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
249 const struct drm_display_mode *mode,
250 struct drm_display_mode *adjusted_mode)
252 struct drm_device *dev = encoder->dev;
253 struct drm_i915_private *dev_priv = dev->dev_private;
254 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
255 struct intel_connector *intel_connector =
256 &lvds_encoder->attached_connector->base;
257 struct intel_crtc *intel_crtc = lvds_encoder->base.new_crtc;
258 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
261 /* Should never happen!! */
262 if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
263 DRM_ERROR("Can't support LVDS on pipe A\n");
267 if (intel_encoder_check_is_cloned(&lvds_encoder->base))
271 * We have timings from the BIOS for the panel, put them in
272 * to the adjusted mode. The CRTC will be set up for this mode,
273 * with the panel scaling set up to source from the H/VDisplay
274 * of the original mode.
276 intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
279 if (HAS_PCH_SPLIT(dev)) {
280 intel_pch_panel_fitting(dev,
281 intel_connector->panel.fitting_mode,
282 mode, adjusted_mode);
286 /* Native modes don't need fitting */
287 if (adjusted_mode->hdisplay == mode->hdisplay &&
288 adjusted_mode->vdisplay == mode->vdisplay)
291 /* 965+ wants fuzzy fitting */
292 if (INTEL_INFO(dev)->gen >= 4)
293 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
297 * Enable automatic panel scaling for non-native modes so that they fill
298 * the screen. Should be enabled before the pipe is enabled, according
299 * to register description and PRM.
300 * Change the value here to see the borders for debugging
303 I915_WRITE(BCLRPAT(pipe), 0);
305 drm_mode_set_crtcinfo(adjusted_mode, 0);
307 switch (intel_connector->panel.fitting_mode) {
308 case DRM_MODE_SCALE_CENTER:
310 * For centered modes, we have to calculate border widths &
311 * heights and modify the values programmed into the CRTC.
313 centre_horizontally(adjusted_mode, mode->hdisplay);
314 centre_vertically(adjusted_mode, mode->vdisplay);
315 border = LVDS_BORDER_ENABLE;
318 case DRM_MODE_SCALE_ASPECT:
319 /* Scale but preserve the aspect ratio */
320 if (INTEL_INFO(dev)->gen >= 4) {
321 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
322 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
324 /* 965+ is easy, it does everything in hw */
325 if (scaled_width > scaled_height)
326 pfit_control |= PFIT_ENABLE | PFIT_SCALING_PILLAR;
327 else if (scaled_width < scaled_height)
328 pfit_control |= PFIT_ENABLE | PFIT_SCALING_LETTER;
329 else if (adjusted_mode->hdisplay != mode->hdisplay)
330 pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
332 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
333 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
335 * For earlier chips we have to calculate the scaling
336 * ratio by hand and program it into the
337 * PFIT_PGM_RATIO register
339 if (scaled_width > scaled_height) { /* pillar */
340 centre_horizontally(adjusted_mode, scaled_height / mode->vdisplay);
342 border = LVDS_BORDER_ENABLE;
343 if (mode->vdisplay != adjusted_mode->vdisplay) {
344 u32 bits = panel_fitter_scaling(mode->vdisplay, adjusted_mode->vdisplay);
345 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
346 bits << PFIT_VERT_SCALE_SHIFT);
347 pfit_control |= (PFIT_ENABLE |
348 VERT_INTERP_BILINEAR |
349 HORIZ_INTERP_BILINEAR);
351 } else if (scaled_width < scaled_height) { /* letter */
352 centre_vertically(adjusted_mode, scaled_width / mode->hdisplay);
354 border = LVDS_BORDER_ENABLE;
355 if (mode->hdisplay != adjusted_mode->hdisplay) {
356 u32 bits = panel_fitter_scaling(mode->hdisplay, adjusted_mode->hdisplay);
357 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
358 bits << PFIT_VERT_SCALE_SHIFT);
359 pfit_control |= (PFIT_ENABLE |
360 VERT_INTERP_BILINEAR |
361 HORIZ_INTERP_BILINEAR);
364 /* Aspects match, Let hw scale both directions */
365 pfit_control |= (PFIT_ENABLE |
366 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
367 VERT_INTERP_BILINEAR |
368 HORIZ_INTERP_BILINEAR);
372 case DRM_MODE_SCALE_FULLSCREEN:
374 * Full scaling, even if it changes the aspect ratio.
375 * Fortunately this is all done for us in hw.
377 if (mode->vdisplay != adjusted_mode->vdisplay ||
378 mode->hdisplay != adjusted_mode->hdisplay) {
379 pfit_control |= PFIT_ENABLE;
380 if (INTEL_INFO(dev)->gen >= 4)
381 pfit_control |= PFIT_SCALING_AUTO;
383 pfit_control |= (VERT_AUTO_SCALE |
384 VERT_INTERP_BILINEAR |
386 HORIZ_INTERP_BILINEAR);
395 /* If not enabling scaling, be consistent and always use 0. */
396 if ((pfit_control & PFIT_ENABLE) == 0) {
401 /* Make sure pre-965 set dither correctly */
402 if (INTEL_INFO(dev)->gen < 4 && dev_priv->lvds_dither)
403 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
405 if (pfit_control != lvds_encoder->pfit_control ||
406 pfit_pgm_ratios != lvds_encoder->pfit_pgm_ratios) {
407 lvds_encoder->pfit_control = pfit_control;
408 lvds_encoder->pfit_pgm_ratios = pfit_pgm_ratios;
409 lvds_encoder->pfit_dirty = true;
411 dev_priv->lvds_border_bits = border;
414 * XXX: It would be nice to support lower refresh rates on the
415 * panels to reduce power consumption, and perhaps match the
416 * user's requested refresh rate.
422 static void intel_lvds_mode_set(struct drm_encoder *encoder,
423 struct drm_display_mode *mode,
424 struct drm_display_mode *adjusted_mode)
427 * The LVDS pin pair will already have been turned on in the
428 * intel_crtc_mode_set since it has a large impact on the DPLL
434 * Detect the LVDS connection.
436 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
437 * connected and closed means disconnected. We also send hotplug events as
438 * needed, using lid status notification from the input layer.
440 static enum drm_connector_status
441 intel_lvds_detect(struct drm_connector *connector, bool force)
443 struct drm_device *dev = connector->dev;
444 enum drm_connector_status status;
446 status = intel_panel_detect(dev);
447 if (status != connector_status_unknown)
450 return connector_status_connected;
454 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
456 static int intel_lvds_get_modes(struct drm_connector *connector)
458 struct intel_lvds_connector *lvds_connector = to_lvds_connector(connector);
459 struct drm_device *dev = connector->dev;
460 struct drm_display_mode *mode;
462 /* use cached edid if we have one */
463 if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
464 return drm_add_edid_modes(connector, lvds_connector->base.edid);
466 mode = drm_mode_duplicate(dev, lvds_connector->base.panel.fixed_mode);
470 drm_mode_probed_add(connector, mode);
474 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
476 DRM_INFO("Skipping forced modeset for %s\n", id->ident);
480 /* The GPU hangs up on these systems if modeset is performed on LID open */
481 static const struct dmi_system_id intel_no_modeset_on_lid[] = {
483 .callback = intel_no_modeset_on_lid_dmi_callback,
484 .ident = "Toshiba Tecra A11",
486 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
487 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
491 { } /* terminating entry */
495 * Lid events. Note the use of 'modeset_on_lid':
496 * - we set it on lid close, and reset it on open
497 * - we use it as a "only once" bit (ie we ignore
498 * duplicate events where it was already properly
500 * - the suspend/resume paths will also set it to
501 * zero, since they restore the mode ("lid open").
503 static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
506 struct intel_lvds_connector *lvds_connector =
507 container_of(nb, struct intel_lvds_connector, lid_notifier);
508 struct drm_connector *connector = &lvds_connector->base.base;
509 struct drm_device *dev = connector->dev;
510 struct drm_i915_private *dev_priv = dev->dev_private;
512 if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
516 * check and update the status of LVDS connector after receiving
517 * the LID nofication event.
519 connector->status = connector->funcs->detect(connector, false);
521 /* Don't force modeset on machines where it causes a GPU lockup */
522 if (dmi_check_system(intel_no_modeset_on_lid))
524 if (!acpi_lid_open()) {
525 dev_priv->modeset_on_lid = 1;
529 if (!dev_priv->modeset_on_lid)
532 dev_priv->modeset_on_lid = 0;
534 mutex_lock(&dev->mode_config.mutex);
535 intel_modeset_setup_hw_state(dev, true);
536 mutex_unlock(&dev->mode_config.mutex);
542 * intel_lvds_destroy - unregister and free LVDS structures
543 * @connector: connector to free
545 * Unregister the DDC bus for this connector then free the driver private
548 static void intel_lvds_destroy(struct drm_connector *connector)
550 struct intel_lvds_connector *lvds_connector =
551 to_lvds_connector(connector);
553 if (lvds_connector->lid_notifier.notifier_call)
554 acpi_lid_notifier_unregister(&lvds_connector->lid_notifier);
556 if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
557 kfree(lvds_connector->base.edid);
559 intel_panel_destroy_backlight(connector->dev);
560 intel_panel_fini(&lvds_connector->base.panel);
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_connector *intel_connector = to_intel_connector(connector);
572 struct drm_device *dev = connector->dev;
574 if (property == dev->mode_config.scaling_mode_property) {
575 struct drm_crtc *crtc;
577 if (value == DRM_MODE_SCALE_NONE) {
578 DRM_DEBUG_KMS("no scaling not supported\n");
582 if (intel_connector->panel.fitting_mode == value) {
583 /* the LVDS scaling property is not changed */
586 intel_connector->panel.fitting_mode = value;
588 crtc = intel_attached_encoder(connector)->base.crtc;
589 if (crtc && crtc->enabled) {
591 * If the CRTC is enabled, the display will be changed
592 * according to the new panel fitting mode.
594 intel_set_mode(crtc, &crtc->mode,
595 crtc->x, crtc->y, crtc->fb);
602 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
603 .mode_fixup = intel_lvds_mode_fixup,
604 .mode_set = intel_lvds_mode_set,
605 .disable = intel_encoder_noop,
608 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
609 .get_modes = intel_lvds_get_modes,
610 .mode_valid = intel_lvds_mode_valid,
611 .best_encoder = intel_best_encoder,
614 static const struct drm_connector_funcs intel_lvds_connector_funcs = {
615 .dpms = intel_connector_dpms,
616 .detect = intel_lvds_detect,
617 .fill_modes = drm_helper_probe_single_connector_modes,
618 .set_property = intel_lvds_set_property,
619 .destroy = intel_lvds_destroy,
622 static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
623 .destroy = intel_encoder_destroy,
626 static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
628 DRM_INFO("Skipping LVDS initialization for %s\n", id->ident);
632 /* These systems claim to have LVDS, but really don't */
633 static const struct dmi_system_id intel_no_lvds[] = {
635 .callback = intel_no_lvds_dmi_callback,
636 .ident = "Apple Mac Mini (Core series)",
638 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
639 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
643 .callback = intel_no_lvds_dmi_callback,
644 .ident = "Apple Mac Mini (Core 2 series)",
646 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
647 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
651 .callback = intel_no_lvds_dmi_callback,
652 .ident = "MSI IM-945GSE-A",
654 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
655 DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
659 .callback = intel_no_lvds_dmi_callback,
660 .ident = "Dell Studio Hybrid",
662 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
663 DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
667 .callback = intel_no_lvds_dmi_callback,
668 .ident = "Dell OptiPlex FX170",
670 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
671 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
675 .callback = intel_no_lvds_dmi_callback,
676 .ident = "AOpen Mini PC",
678 DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
679 DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
683 .callback = intel_no_lvds_dmi_callback,
684 .ident = "AOpen Mini PC MP915",
686 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
687 DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
691 .callback = intel_no_lvds_dmi_callback,
692 .ident = "AOpen i915GMm-HFS",
694 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
695 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
699 .callback = intel_no_lvds_dmi_callback,
700 .ident = "AOpen i45GMx-I",
702 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
703 DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
707 .callback = intel_no_lvds_dmi_callback,
708 .ident = "Aopen i945GTt-VFA",
710 DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
714 .callback = intel_no_lvds_dmi_callback,
715 .ident = "Clientron U800",
717 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
718 DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
722 .callback = intel_no_lvds_dmi_callback,
723 .ident = "Clientron E830",
725 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
726 DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
730 .callback = intel_no_lvds_dmi_callback,
731 .ident = "Asus EeeBox PC EB1007",
733 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
734 DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
738 .callback = intel_no_lvds_dmi_callback,
739 .ident = "Asus AT5NM10T-I",
741 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
742 DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
746 .callback = intel_no_lvds_dmi_callback,
747 .ident = "Hewlett-Packard HP t5740e Thin Client",
749 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
750 DMI_MATCH(DMI_PRODUCT_NAME, "HP t5740e Thin Client"),
754 .callback = intel_no_lvds_dmi_callback,
755 .ident = "Hewlett-Packard t5745",
757 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
758 DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
762 .callback = intel_no_lvds_dmi_callback,
763 .ident = "Hewlett-Packard st5747",
765 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
766 DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
770 .callback = intel_no_lvds_dmi_callback,
771 .ident = "MSI Wind Box DC500",
773 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
774 DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
778 .callback = intel_no_lvds_dmi_callback,
779 .ident = "Gigabyte GA-D525TUD",
781 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
782 DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
786 .callback = intel_no_lvds_dmi_callback,
787 .ident = "Supermicro X7SPA-H",
789 DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
790 DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"),
794 { } /* terminating entry */
798 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
800 * @connector: LVDS connector
802 * Find the reduced downclock for LVDS in EDID.
804 static void intel_find_lvds_downclock(struct drm_device *dev,
805 struct drm_display_mode *fixed_mode,
806 struct drm_connector *connector)
808 struct drm_i915_private *dev_priv = dev->dev_private;
809 struct drm_display_mode *scan;
812 temp_downclock = fixed_mode->clock;
813 list_for_each_entry(scan, &connector->probed_modes, head) {
815 * If one mode has the same resolution with the fixed_panel
816 * mode while they have the different refresh rate, it means
817 * that the reduced downclock is found for the LVDS. In such
818 * case we can set the different FPx0/1 to dynamically select
819 * between low and high frequency.
821 if (scan->hdisplay == fixed_mode->hdisplay &&
822 scan->hsync_start == fixed_mode->hsync_start &&
823 scan->hsync_end == fixed_mode->hsync_end &&
824 scan->htotal == fixed_mode->htotal &&
825 scan->vdisplay == fixed_mode->vdisplay &&
826 scan->vsync_start == fixed_mode->vsync_start &&
827 scan->vsync_end == fixed_mode->vsync_end &&
828 scan->vtotal == fixed_mode->vtotal) {
829 if (scan->clock < temp_downclock) {
831 * The downclock is already found. But we
832 * expect to find the lower downclock.
834 temp_downclock = scan->clock;
838 if (temp_downclock < fixed_mode->clock && i915_lvds_downclock) {
839 /* We found the downclock for LVDS. */
840 dev_priv->lvds_downclock_avail = 1;
841 dev_priv->lvds_downclock = temp_downclock;
842 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
843 "Normal clock %dKhz, downclock %dKhz\n",
844 fixed_mode->clock, temp_downclock);
849 * Enumerate the child dev array parsed from VBT to check whether
850 * the LVDS is present.
851 * If it is present, return 1.
852 * If it is not present, return false.
853 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
855 static bool lvds_is_present_in_vbt(struct drm_device *dev,
858 struct drm_i915_private *dev_priv = dev->dev_private;
861 if (!dev_priv->child_dev_num)
864 for (i = 0; i < dev_priv->child_dev_num; i++) {
865 struct child_device_config *child = dev_priv->child_dev + i;
867 /* If the device type is not LFP, continue.
868 * We have to check both the new identifiers as well as the
869 * old for compatibility with some BIOSes.
871 if (child->device_type != DEVICE_TYPE_INT_LFP &&
872 child->device_type != DEVICE_TYPE_LFP)
875 if (intel_gmbus_is_port_valid(child->i2c_pin))
876 *i2c_pin = child->i2c_pin;
878 /* However, we cannot trust the BIOS writers to populate
879 * the VBT correctly. Since LVDS requires additional
880 * information from AIM blocks, a non-zero addin offset is
881 * a good indicator that the LVDS is actually present.
883 if (child->addin_offset)
886 /* But even then some BIOS writers perform some black magic
887 * and instantiate the device without reference to any
888 * additional data. Trust that if the VBT was written into
889 * the OpRegion then they have validated the LVDS's existence.
891 if (dev_priv->opregion.vbt)
898 static bool intel_lvds_supported(struct drm_device *dev)
900 /* With the introduction of the PCH we gained a dedicated
901 * LVDS presence pin, use it. */
902 if (HAS_PCH_SPLIT(dev))
905 /* Otherwise LVDS was only attached to mobile products,
906 * except for the inglorious 830gm */
907 return IS_MOBILE(dev) && !IS_I830(dev);
911 * intel_lvds_init - setup LVDS connectors on this device
914 * Create the connector, register the LVDS DDC bus, and try to figure out what
915 * modes we can display on the LVDS panel (if present).
917 bool intel_lvds_init(struct drm_device *dev)
919 struct drm_i915_private *dev_priv = dev->dev_private;
920 struct intel_lvds_encoder *lvds_encoder;
921 struct intel_encoder *intel_encoder;
922 struct intel_lvds_connector *lvds_connector;
923 struct intel_connector *intel_connector;
924 struct drm_connector *connector;
925 struct drm_encoder *encoder;
926 struct drm_display_mode *scan; /* *modes, *bios_mode; */
927 struct drm_display_mode *fixed_mode = NULL;
929 struct drm_crtc *crtc;
934 if (!intel_lvds_supported(dev))
937 /* Skip init on machines we know falsely report LVDS */
938 if (dmi_check_system(intel_no_lvds))
941 pin = GMBUS_PORT_PANEL;
942 if (!lvds_is_present_in_vbt(dev, &pin)) {
943 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
947 if (HAS_PCH_SPLIT(dev)) {
948 if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
950 if (dev_priv->edp.support) {
951 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
956 lvds_encoder = kzalloc(sizeof(struct intel_lvds_encoder), GFP_KERNEL);
960 lvds_connector = kzalloc(sizeof(struct intel_lvds_connector), GFP_KERNEL);
961 if (!lvds_connector) {
966 lvds_encoder->attached_connector = lvds_connector;
968 if (!HAS_PCH_SPLIT(dev)) {
969 lvds_encoder->pfit_control = I915_READ(PFIT_CONTROL);
972 intel_encoder = &lvds_encoder->base;
973 encoder = &intel_encoder->base;
974 intel_connector = &lvds_connector->base;
975 connector = &intel_connector->base;
976 drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
977 DRM_MODE_CONNECTOR_LVDS);
979 drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
980 DRM_MODE_ENCODER_LVDS);
982 intel_encoder->enable = intel_enable_lvds;
983 intel_encoder->disable = intel_disable_lvds;
984 intel_encoder->get_hw_state = intel_lvds_get_hw_state;
985 intel_connector->get_hw_state = intel_connector_get_hw_state;
987 intel_connector_attach_encoder(intel_connector, intel_encoder);
988 intel_encoder->type = INTEL_OUTPUT_LVDS;
990 intel_encoder->cloneable = false;
991 if (HAS_PCH_SPLIT(dev))
992 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
993 else if (IS_GEN4(dev))
994 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
996 intel_encoder->crtc_mask = (1 << 1);
998 drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
999 drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
1000 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
1001 connector->interlace_allowed = false;
1002 connector->doublescan_allowed = false;
1004 /* create the scaling mode property */
1005 drm_mode_create_scaling_mode_property(dev);
1006 drm_object_attach_property(&connector->base,
1007 dev->mode_config.scaling_mode_property,
1008 DRM_MODE_SCALE_ASPECT);
1009 intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
1012 * 1) check for EDID on DDC
1013 * 2) check for VBT data
1014 * 3) check to see if LVDS is already on
1015 * if none of the above, no panel
1016 * 4) make sure lid is open
1017 * if closed, act like it's not there for now
1021 * Attempt to get the fixed panel mode from DDC. Assume that the
1022 * preferred mode is the right one.
1024 edid = drm_get_edid(connector, intel_gmbus_get_adapter(dev_priv, pin));
1026 if (drm_add_edid_modes(connector, edid)) {
1027 drm_mode_connector_update_edid_property(connector,
1031 edid = ERR_PTR(-EINVAL);
1034 edid = ERR_PTR(-ENOENT);
1036 lvds_connector->base.edid = edid;
1038 if (IS_ERR_OR_NULL(edid)) {
1039 /* Didn't get an EDID, so
1040 * Set wide sync ranges so we get all modes
1041 * handed to valid_mode for checking
1043 connector->display_info.min_vfreq = 0;
1044 connector->display_info.max_vfreq = 200;
1045 connector->display_info.min_hfreq = 0;
1046 connector->display_info.max_hfreq = 200;
1049 list_for_each_entry(scan, &connector->probed_modes, head) {
1050 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
1051 DRM_DEBUG_KMS("using preferred mode from EDID: ");
1052 drm_mode_debug_printmodeline(scan);
1054 fixed_mode = drm_mode_duplicate(dev, scan);
1056 intel_find_lvds_downclock(dev, fixed_mode,
1063 /* Failed to get EDID, what about VBT? */
1064 if (dev_priv->lfp_lvds_vbt_mode) {
1065 DRM_DEBUG_KMS("using mode from VBT: ");
1066 drm_mode_debug_printmodeline(dev_priv->lfp_lvds_vbt_mode);
1068 fixed_mode = drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
1070 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1076 * If we didn't get EDID, try checking if the panel is already turned
1077 * on. If so, assume that whatever is currently programmed is the
1081 /* Ironlake: FIXME if still fail, not try pipe mode now */
1082 if (HAS_PCH_SPLIT(dev))
1085 lvds = I915_READ(LVDS);
1086 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
1087 crtc = intel_get_crtc_for_pipe(dev, pipe);
1089 if (crtc && (lvds & LVDS_PORT_EN)) {
1090 fixed_mode = intel_crtc_mode_get(dev, crtc);
1092 DRM_DEBUG_KMS("using current (BIOS) mode: ");
1093 drm_mode_debug_printmodeline(fixed_mode);
1094 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1099 /* If we still don't have a mode after all that, give up. */
1105 * Unlock registers and just
1106 * leave them unlocked
1108 if (HAS_PCH_SPLIT(dev)) {
1109 I915_WRITE(PCH_PP_CONTROL,
1110 I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
1112 I915_WRITE(PP_CONTROL,
1113 I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
1115 lvds_connector->lid_notifier.notifier_call = intel_lid_notify;
1116 if (acpi_lid_notifier_register(&lvds_connector->lid_notifier)) {
1117 DRM_DEBUG_KMS("lid notifier registration failed\n");
1118 lvds_connector->lid_notifier.notifier_call = NULL;
1120 drm_sysfs_connector_add(connector);
1122 intel_panel_init(&intel_connector->panel, fixed_mode);
1123 intel_panel_setup_backlight(connector);
1128 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1129 drm_connector_cleanup(connector);
1130 drm_encoder_cleanup(encoder);
1132 drm_mode_destroy(dev, fixed_mode);
1133 kfree(lvds_encoder);
1134 kfree(lvds_connector);