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 */
44 struct intel_lvds_priv {
51 * Sets the backlight level.
53 * \param level backlight level, from 0 to intel_lvds_get_max_backlight().
55 static void intel_lvds_set_backlight(struct drm_device *dev, int level)
57 struct drm_i915_private *dev_priv = dev->dev_private;
60 if (HAS_PCH_SPLIT(dev))
61 reg = BLC_PWM_CPU_CTL;
65 blc_pwm_ctl = I915_READ(reg) & ~BACKLIGHT_DUTY_CYCLE_MASK;
66 I915_WRITE(reg, (blc_pwm_ctl |
67 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
71 * Returns the maximum level of the backlight duty cycle field.
73 static u32 intel_lvds_get_max_backlight(struct drm_device *dev)
75 struct drm_i915_private *dev_priv = dev->dev_private;
78 if (HAS_PCH_SPLIT(dev))
79 reg = BLC_PWM_PCH_CTL2;
83 return ((I915_READ(reg) & BACKLIGHT_MODULATION_FREQ_MASK) >>
84 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
88 * Sets the power state for the panel.
90 static void intel_lvds_set_power(struct drm_device *dev, bool on)
92 struct drm_i915_private *dev_priv = dev->dev_private;
93 u32 pp_status, ctl_reg, status_reg, lvds_reg;
95 if (HAS_PCH_SPLIT(dev)) {
96 ctl_reg = PCH_PP_CONTROL;
97 status_reg = PCH_PP_STATUS;
100 ctl_reg = PP_CONTROL;
101 status_reg = PP_STATUS;
106 I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);
107 POSTING_READ(lvds_reg);
109 I915_WRITE(ctl_reg, I915_READ(ctl_reg) |
112 pp_status = I915_READ(status_reg);
113 } while ((pp_status & PP_ON) == 0);
115 intel_lvds_set_backlight(dev, dev_priv->backlight_duty_cycle);
117 intel_lvds_set_backlight(dev, 0);
119 I915_WRITE(ctl_reg, I915_READ(ctl_reg) &
122 pp_status = I915_READ(status_reg);
123 } while (pp_status & PP_ON);
125 I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
126 POSTING_READ(lvds_reg);
130 static void intel_lvds_dpms(struct drm_encoder *encoder, int mode)
132 struct drm_device *dev = encoder->dev;
134 if (mode == DRM_MODE_DPMS_ON)
135 intel_lvds_set_power(dev, true);
137 intel_lvds_set_power(dev, false);
139 /* XXX: We never power down the LVDS pairs. */
142 static int intel_lvds_mode_valid(struct drm_connector *connector,
143 struct drm_display_mode *mode)
145 struct drm_device *dev = connector->dev;
146 struct drm_i915_private *dev_priv = dev->dev_private;
147 struct drm_display_mode *fixed_mode = dev_priv->panel_fixed_mode;
150 if (mode->hdisplay > fixed_mode->hdisplay)
152 if (mode->vdisplay > fixed_mode->vdisplay)
159 static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
160 struct drm_display_mode *mode,
161 struct drm_display_mode *adjusted_mode)
164 * float point operation is not supported . So the PANEL_RATIO_FACTOR
165 * is defined, which can avoid the float point computation when
166 * calculating the panel ratio.
168 #define PANEL_RATIO_FACTOR 8192
169 struct drm_device *dev = encoder->dev;
170 struct drm_i915_private *dev_priv = dev->dev_private;
171 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
172 struct drm_encoder *tmp_encoder;
173 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
174 struct intel_lvds_priv *lvds_priv = intel_encoder->dev_priv;
175 u32 pfit_control = 0, pfit_pgm_ratios = 0;
176 int left_border = 0, right_border = 0, top_border = 0;
177 int bottom_border = 0;
179 int panel_ratio, desired_ratio, vert_scale, horiz_scale;
180 int horiz_ratio, vert_ratio;
181 u32 hsync_width, vsync_width;
182 u32 hblank_width, vblank_width;
183 u32 hsync_pos, vsync_pos;
185 /* Should never happen!! */
186 if (!IS_I965G(dev) && intel_crtc->pipe == 0) {
187 DRM_ERROR("Can't support LVDS on pipe A\n");
191 /* Should never happen!! */
192 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, head) {
193 if (tmp_encoder != encoder && tmp_encoder->crtc == encoder->crtc) {
194 DRM_ERROR("Can't enable LVDS and another "
195 "encoder on the same pipe\n");
199 /* If we don't have a panel mode, there is nothing we can do */
200 if (dev_priv->panel_fixed_mode == NULL)
203 * If we have timings from the BIOS for the panel, put them in
204 * to the adjusted mode. The CRTC will be set up for this mode,
205 * with the panel scaling set up to source from the H/VDisplay
206 * of the original mode.
208 if (dev_priv->panel_fixed_mode != NULL) {
209 adjusted_mode->hdisplay = dev_priv->panel_fixed_mode->hdisplay;
210 adjusted_mode->hsync_start =
211 dev_priv->panel_fixed_mode->hsync_start;
212 adjusted_mode->hsync_end =
213 dev_priv->panel_fixed_mode->hsync_end;
214 adjusted_mode->htotal = dev_priv->panel_fixed_mode->htotal;
215 adjusted_mode->vdisplay = dev_priv->panel_fixed_mode->vdisplay;
216 adjusted_mode->vsync_start =
217 dev_priv->panel_fixed_mode->vsync_start;
218 adjusted_mode->vsync_end =
219 dev_priv->panel_fixed_mode->vsync_end;
220 adjusted_mode->vtotal = dev_priv->panel_fixed_mode->vtotal;
221 adjusted_mode->clock = dev_priv->panel_fixed_mode->clock;
222 drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
225 /* Make sure pre-965s set dither correctly */
226 if (!IS_I965G(dev)) {
227 if (dev_priv->panel_wants_dither || dev_priv->lvds_dither)
228 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
231 /* Native modes don't need fitting */
232 if (adjusted_mode->hdisplay == mode->hdisplay &&
233 adjusted_mode->vdisplay == mode->vdisplay) {
239 /* full screen scale for now */
240 if (HAS_PCH_SPLIT(dev))
243 /* 965+ wants fuzzy fitting */
245 pfit_control |= (intel_crtc->pipe << PFIT_PIPE_SHIFT) |
248 hsync_width = adjusted_mode->crtc_hsync_end -
249 adjusted_mode->crtc_hsync_start;
250 vsync_width = adjusted_mode->crtc_vsync_end -
251 adjusted_mode->crtc_vsync_start;
252 hblank_width = adjusted_mode->crtc_hblank_end -
253 adjusted_mode->crtc_hblank_start;
254 vblank_width = adjusted_mode->crtc_vblank_end -
255 adjusted_mode->crtc_vblank_start;
257 * Deal with panel fitting options. Figure out how to stretch the
258 * image based on its aspect ratio & the current panel fitting mode.
260 panel_ratio = adjusted_mode->hdisplay * PANEL_RATIO_FACTOR /
261 adjusted_mode->vdisplay;
262 desired_ratio = mode->hdisplay * PANEL_RATIO_FACTOR /
265 * Enable automatic panel scaling for non-native modes so that they fill
266 * the screen. Should be enabled before the pipe is enabled, according
267 * to register description and PRM.
268 * Change the value here to see the borders for debugging
270 if (!HAS_PCH_SPLIT(dev)) {
271 I915_WRITE(BCLRPAT_A, 0);
272 I915_WRITE(BCLRPAT_B, 0);
275 switch (lvds_priv->fitting_mode) {
276 case DRM_MODE_SCALE_CENTER:
278 * For centered modes, we have to calculate border widths &
279 * heights and modify the values programmed into the CRTC.
281 left_border = (adjusted_mode->hdisplay - mode->hdisplay) / 2;
282 right_border = left_border;
283 if (mode->hdisplay & 1)
285 top_border = (adjusted_mode->vdisplay - mode->vdisplay) / 2;
286 bottom_border = top_border;
287 if (mode->vdisplay & 1)
289 /* Set active & border values */
290 adjusted_mode->crtc_hdisplay = mode->hdisplay;
291 /* Keep the boder be even */
292 if (right_border & 1)
294 /* use the border directly instead of border minuse one */
295 adjusted_mode->crtc_hblank_start = mode->hdisplay +
297 /* keep the blank width constant */
298 adjusted_mode->crtc_hblank_end =
299 adjusted_mode->crtc_hblank_start + hblank_width;
300 /* get the hsync pos relative to hblank start */
301 hsync_pos = (hblank_width - hsync_width) / 2;
302 /* keep the hsync pos be even */
305 adjusted_mode->crtc_hsync_start =
306 adjusted_mode->crtc_hblank_start + hsync_pos;
307 /* keep the hsync width constant */
308 adjusted_mode->crtc_hsync_end =
309 adjusted_mode->crtc_hsync_start + hsync_width;
310 adjusted_mode->crtc_vdisplay = mode->vdisplay;
311 /* use the border instead of border minus one */
312 adjusted_mode->crtc_vblank_start = mode->vdisplay +
314 /* keep the vblank width constant */
315 adjusted_mode->crtc_vblank_end =
316 adjusted_mode->crtc_vblank_start + vblank_width;
317 /* get the vsync start postion relative to vblank start */
318 vsync_pos = (vblank_width - vsync_width) / 2;
319 adjusted_mode->crtc_vsync_start =
320 adjusted_mode->crtc_vblank_start + vsync_pos;
321 /* keep the vsync width constant */
322 adjusted_mode->crtc_vsync_end =
323 adjusted_mode->crtc_vsync_start + vsync_width;
326 case DRM_MODE_SCALE_ASPECT:
327 /* Scale but preserve the spect ratio */
328 pfit_control |= PFIT_ENABLE;
330 /* 965+ is easy, it does everything in hw */
331 if (panel_ratio > desired_ratio)
332 pfit_control |= PFIT_SCALING_PILLAR;
333 else if (panel_ratio < desired_ratio)
334 pfit_control |= PFIT_SCALING_LETTER;
336 pfit_control |= PFIT_SCALING_AUTO;
339 * For earlier chips we have to calculate the scaling
340 * ratio by hand and program it into the
341 * PFIT_PGM_RATIO register
343 u32 horiz_bits, vert_bits, bits = 12;
344 horiz_ratio = mode->hdisplay * PANEL_RATIO_FACTOR/
345 adjusted_mode->hdisplay;
346 vert_ratio = mode->vdisplay * PANEL_RATIO_FACTOR/
347 adjusted_mode->vdisplay;
348 horiz_scale = adjusted_mode->hdisplay *
349 PANEL_RATIO_FACTOR / mode->hdisplay;
350 vert_scale = adjusted_mode->vdisplay *
351 PANEL_RATIO_FACTOR / mode->vdisplay;
353 /* retain aspect ratio */
354 if (panel_ratio > desired_ratio) { /* Pillar */
356 scaled_width = mode->hdisplay * vert_scale /
358 horiz_ratio = vert_ratio;
359 pfit_control |= (VERT_AUTO_SCALE |
360 VERT_INTERP_BILINEAR |
361 HORIZ_INTERP_BILINEAR);
362 /* Pillar will have left/right borders */
363 left_border = (adjusted_mode->hdisplay -
365 right_border = left_border;
366 if (mode->hdisplay & 1) /* odd resolutions */
368 /* keep the border be even */
369 if (right_border & 1)
371 adjusted_mode->crtc_hdisplay = scaled_width;
372 /* use border instead of border minus one */
373 adjusted_mode->crtc_hblank_start =
374 scaled_width + right_border;
375 /* keep the hblank width constant */
376 adjusted_mode->crtc_hblank_end =
377 adjusted_mode->crtc_hblank_start +
380 * get the hsync start pos relative to
383 hsync_pos = (hblank_width - hsync_width) / 2;
384 /* keep the hsync_pos be even */
387 adjusted_mode->crtc_hsync_start =
388 adjusted_mode->crtc_hblank_start +
390 /* keept hsync width constant */
391 adjusted_mode->crtc_hsync_end =
392 adjusted_mode->crtc_hsync_start +
395 } else if (panel_ratio < desired_ratio) { /* letter */
396 u32 scaled_height = mode->vdisplay *
397 horiz_scale / PANEL_RATIO_FACTOR;
398 vert_ratio = horiz_ratio;
399 pfit_control |= (HORIZ_AUTO_SCALE |
400 VERT_INTERP_BILINEAR |
401 HORIZ_INTERP_BILINEAR);
402 /* Letterbox will have top/bottom border */
403 top_border = (adjusted_mode->vdisplay -
405 bottom_border = top_border;
406 if (mode->vdisplay & 1)
408 adjusted_mode->crtc_vdisplay = scaled_height;
409 /* use border instead of border minus one */
410 adjusted_mode->crtc_vblank_start =
411 scaled_height + bottom_border;
412 /* keep the vblank width constant */
413 adjusted_mode->crtc_vblank_end =
414 adjusted_mode->crtc_vblank_start +
417 * get the vsync start pos relative to
420 vsync_pos = (vblank_width - vsync_width) / 2;
421 adjusted_mode->crtc_vsync_start =
422 adjusted_mode->crtc_vblank_start +
424 /* keep the vsync width constant */
425 adjusted_mode->crtc_vsync_end =
426 adjusted_mode->crtc_vsync_start +
430 /* Aspects match, Let hw scale both directions */
431 pfit_control |= (VERT_AUTO_SCALE |
433 VERT_INTERP_BILINEAR |
434 HORIZ_INTERP_BILINEAR);
436 horiz_bits = (1 << bits) * horiz_ratio /
438 vert_bits = (1 << bits) * vert_ratio /
441 ((vert_bits << PFIT_VERT_SCALE_SHIFT) &
442 PFIT_VERT_SCALE_MASK) |
443 ((horiz_bits << PFIT_HORIZ_SCALE_SHIFT) &
444 PFIT_HORIZ_SCALE_MASK);
448 case DRM_MODE_SCALE_FULLSCREEN:
450 * Full scaling, even if it changes the aspect ratio.
451 * Fortunately this is all done for us in hw.
453 pfit_control |= PFIT_ENABLE;
455 pfit_control |= PFIT_SCALING_AUTO;
457 pfit_control |= (VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
458 VERT_INTERP_BILINEAR |
459 HORIZ_INTERP_BILINEAR);
466 lvds_priv->pfit_control = pfit_control;
467 lvds_priv->pfit_pgm_ratios = pfit_pgm_ratios;
469 * When there exists the border, it means that the LVDS_BORDR
473 dev_priv->lvds_border_bits |= LVDS_BORDER_ENABLE;
475 dev_priv->lvds_border_bits &= ~(LVDS_BORDER_ENABLE);
477 * XXX: It would be nice to support lower refresh rates on the
478 * panels to reduce power consumption, and perhaps match the
479 * user's requested refresh rate.
485 static void intel_lvds_prepare(struct drm_encoder *encoder)
487 struct drm_device *dev = encoder->dev;
488 struct drm_i915_private *dev_priv = dev->dev_private;
491 if (HAS_PCH_SPLIT(dev))
492 reg = BLC_PWM_CPU_CTL;
496 dev_priv->saveBLC_PWM_CTL = I915_READ(reg);
497 dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL &
498 BACKLIGHT_DUTY_CYCLE_MASK);
500 intel_lvds_set_power(dev, false);
503 static void intel_lvds_commit( struct drm_encoder *encoder)
505 struct drm_device *dev = encoder->dev;
506 struct drm_i915_private *dev_priv = dev->dev_private;
508 if (dev_priv->backlight_duty_cycle == 0)
509 dev_priv->backlight_duty_cycle =
510 intel_lvds_get_max_backlight(dev);
512 intel_lvds_set_power(dev, true);
515 static void intel_lvds_mode_set(struct drm_encoder *encoder,
516 struct drm_display_mode *mode,
517 struct drm_display_mode *adjusted_mode)
519 struct drm_device *dev = encoder->dev;
520 struct drm_i915_private *dev_priv = dev->dev_private;
521 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
522 struct intel_lvds_priv *lvds_priv = intel_encoder->dev_priv;
525 * The LVDS pin pair will already have been turned on in the
526 * intel_crtc_mode_set since it has a large impact on the DPLL
530 if (HAS_PCH_SPLIT(dev))
534 * Enable automatic panel scaling so that non-native modes fill the
535 * screen. Should be enabled before the pipe is enabled, according to
536 * register description and PRM.
538 I915_WRITE(PFIT_PGM_RATIOS, lvds_priv->pfit_pgm_ratios);
539 I915_WRITE(PFIT_CONTROL, lvds_priv->pfit_control);
543 * Detect the LVDS connection.
545 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
546 * connected and closed means disconnected. We also send hotplug events as
547 * needed, using lid status notification from the input layer.
549 static enum drm_connector_status intel_lvds_detect(struct drm_connector *connector)
551 struct drm_device *dev = connector->dev;
552 enum drm_connector_status status = connector_status_connected;
554 /* ACPI lid methods were generally unreliable in this generation, so
557 if (IS_GEN2(dev) || IS_GEN3(dev))
558 return connector_status_connected;
564 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
566 static int intel_lvds_get_modes(struct drm_connector *connector)
568 struct drm_device *dev = connector->dev;
569 struct drm_encoder *encoder = intel_attached_encoder(connector);
570 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
571 struct drm_i915_private *dev_priv = dev->dev_private;
574 if (dev_priv->lvds_edid_good) {
575 ret = intel_ddc_get_modes(connector, intel_encoder->ddc_bus);
581 /* Didn't get an EDID, so
582 * Set wide sync ranges so we get all modes
583 * handed to valid_mode for checking
585 connector->display_info.min_vfreq = 0;
586 connector->display_info.max_vfreq = 200;
587 connector->display_info.min_hfreq = 0;
588 connector->display_info.max_hfreq = 200;
590 if (dev_priv->panel_fixed_mode != NULL) {
591 struct drm_display_mode *mode;
593 mode = drm_mode_duplicate(dev, dev_priv->panel_fixed_mode);
594 drm_mode_probed_add(connector, mode);
602 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
604 DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id->ident);
608 /* The GPU hangs up on these systems if modeset is performed on LID open */
609 static const struct dmi_system_id intel_no_modeset_on_lid[] = {
611 .callback = intel_no_modeset_on_lid_dmi_callback,
612 .ident = "Toshiba Tecra A11",
614 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
615 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
619 { } /* terminating entry */
623 * Lid events. Note the use of 'modeset_on_lid':
624 * - we set it on lid close, and reset it on open
625 * - we use it as a "only once" bit (ie we ignore
626 * duplicate events where it was already properly
628 * - the suspend/resume paths will also set it to
629 * zero, since they restore the mode ("lid open").
631 static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
634 struct drm_i915_private *dev_priv =
635 container_of(nb, struct drm_i915_private, lid_notifier);
636 struct drm_device *dev = dev_priv->dev;
637 struct drm_connector *connector = dev_priv->int_lvds_connector;
640 * check and update the status of LVDS connector after receiving
641 * the LID nofication event.
644 connector->status = connector->funcs->detect(connector);
645 /* Don't force modeset on machines where it causes a GPU lockup */
646 if (dmi_check_system(intel_no_modeset_on_lid))
648 if (!acpi_lid_open()) {
649 dev_priv->modeset_on_lid = 1;
653 if (!dev_priv->modeset_on_lid)
656 dev_priv->modeset_on_lid = 0;
658 mutex_lock(&dev->mode_config.mutex);
659 drm_helper_resume_force_mode(dev);
660 mutex_unlock(&dev->mode_config.mutex);
666 * intel_lvds_destroy - unregister and free LVDS structures
667 * @connector: connector to free
669 * Unregister the DDC bus for this connector then free the driver private
672 static void intel_lvds_destroy(struct drm_connector *connector)
674 struct drm_device *dev = connector->dev;
675 struct drm_i915_private *dev_priv = dev->dev_private;
677 if (dev_priv->lid_notifier.notifier_call)
678 acpi_lid_notifier_unregister(&dev_priv->lid_notifier);
679 drm_sysfs_connector_remove(connector);
680 drm_connector_cleanup(connector);
684 static int intel_lvds_set_property(struct drm_connector *connector,
685 struct drm_property *property,
688 struct drm_device *dev = connector->dev;
690 if (property == dev->mode_config.scaling_mode_property &&
691 connector->encoder) {
692 struct drm_crtc *crtc = connector->encoder->crtc;
693 struct drm_encoder *encoder = connector->encoder;
694 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
695 struct intel_lvds_priv *lvds_priv = intel_encoder->dev_priv;
697 if (value == DRM_MODE_SCALE_NONE) {
698 DRM_DEBUG_KMS("no scaling not supported\n");
701 if (lvds_priv->fitting_mode == value) {
702 /* the LVDS scaling property is not changed */
705 lvds_priv->fitting_mode = value;
706 if (crtc && crtc->enabled) {
708 * If the CRTC is enabled, the display will be changed
709 * according to the new panel fitting mode.
711 drm_crtc_helper_set_mode(crtc, &crtc->mode,
712 crtc->x, crtc->y, crtc->fb);
719 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
720 .dpms = intel_lvds_dpms,
721 .mode_fixup = intel_lvds_mode_fixup,
722 .prepare = intel_lvds_prepare,
723 .mode_set = intel_lvds_mode_set,
724 .commit = intel_lvds_commit,
727 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
728 .get_modes = intel_lvds_get_modes,
729 .mode_valid = intel_lvds_mode_valid,
730 .best_encoder = intel_attached_encoder,
733 static const struct drm_connector_funcs intel_lvds_connector_funcs = {
734 .dpms = drm_helper_connector_dpms,
735 .detect = intel_lvds_detect,
736 .fill_modes = drm_helper_probe_single_connector_modes,
737 .set_property = intel_lvds_set_property,
738 .destroy = intel_lvds_destroy,
742 static void intel_lvds_enc_destroy(struct drm_encoder *encoder)
744 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
746 if (intel_encoder->ddc_bus)
747 intel_i2c_destroy(intel_encoder->ddc_bus);
748 drm_encoder_cleanup(encoder);
749 kfree(intel_encoder);
752 static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
753 .destroy = intel_lvds_enc_destroy,
756 static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
758 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id->ident);
762 /* These systems claim to have LVDS, but really don't */
763 static const struct dmi_system_id intel_no_lvds[] = {
765 .callback = intel_no_lvds_dmi_callback,
766 .ident = "Apple Mac Mini (Core series)",
768 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
769 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
773 .callback = intel_no_lvds_dmi_callback,
774 .ident = "Apple Mac Mini (Core 2 series)",
776 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
777 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
781 .callback = intel_no_lvds_dmi_callback,
782 .ident = "MSI IM-945GSE-A",
784 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
785 DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
789 .callback = intel_no_lvds_dmi_callback,
790 .ident = "Dell Studio Hybrid",
792 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
793 DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
797 .callback = intel_no_lvds_dmi_callback,
798 .ident = "AOpen Mini PC",
800 DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
801 DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
805 .callback = intel_no_lvds_dmi_callback,
806 .ident = "AOpen Mini PC MP915",
808 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
809 DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
813 .callback = intel_no_lvds_dmi_callback,
814 .ident = "Aopen i945GTt-VFA",
816 DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
820 .callback = intel_no_lvds_dmi_callback,
821 .ident = "Clientron U800",
823 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
824 DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
828 { } /* terminating entry */
832 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
834 * @connector: LVDS connector
836 * Find the reduced downclock for LVDS in EDID.
838 static void intel_find_lvds_downclock(struct drm_device *dev,
839 struct drm_connector *connector)
841 struct drm_i915_private *dev_priv = dev->dev_private;
842 struct drm_display_mode *scan, *panel_fixed_mode;
845 panel_fixed_mode = dev_priv->panel_fixed_mode;
846 temp_downclock = panel_fixed_mode->clock;
848 mutex_lock(&dev->mode_config.mutex);
849 list_for_each_entry(scan, &connector->probed_modes, head) {
851 * If one mode has the same resolution with the fixed_panel
852 * mode while they have the different refresh rate, it means
853 * that the reduced downclock is found for the LVDS. In such
854 * case we can set the different FPx0/1 to dynamically select
855 * between low and high frequency.
857 if (scan->hdisplay == panel_fixed_mode->hdisplay &&
858 scan->hsync_start == panel_fixed_mode->hsync_start &&
859 scan->hsync_end == panel_fixed_mode->hsync_end &&
860 scan->htotal == panel_fixed_mode->htotal &&
861 scan->vdisplay == panel_fixed_mode->vdisplay &&
862 scan->vsync_start == panel_fixed_mode->vsync_start &&
863 scan->vsync_end == panel_fixed_mode->vsync_end &&
864 scan->vtotal == panel_fixed_mode->vtotal) {
865 if (scan->clock < temp_downclock) {
867 * The downclock is already found. But we
868 * expect to find the lower downclock.
870 temp_downclock = scan->clock;
874 mutex_unlock(&dev->mode_config.mutex);
875 if (temp_downclock < panel_fixed_mode->clock &&
876 i915_lvds_downclock) {
877 /* We found the downclock for LVDS. */
878 dev_priv->lvds_downclock_avail = 1;
879 dev_priv->lvds_downclock = temp_downclock;
880 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
881 "Normal clock %dKhz, downclock %dKhz\n",
882 panel_fixed_mode->clock, temp_downclock);
888 * Enumerate the child dev array parsed from VBT to check whether
889 * the LVDS is present.
890 * If it is present, return 1.
891 * If it is not present, return false.
892 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
893 * Note: The addin_offset should also be checked for LVDS panel.
894 * Only when it is non-zero, it is assumed that it is present.
896 static int lvds_is_present_in_vbt(struct drm_device *dev)
898 struct drm_i915_private *dev_priv = dev->dev_private;
899 struct child_device_config *p_child;
902 if (!dev_priv->child_dev_num)
906 for (i = 0; i < dev_priv->child_dev_num; i++) {
907 p_child = dev_priv->child_dev + i;
909 * If the device type is not LFP, continue.
910 * If the device type is 0x22, it is also regarded as LFP.
912 if (p_child->device_type != DEVICE_TYPE_INT_LFP &&
913 p_child->device_type != DEVICE_TYPE_LFP)
916 /* The addin_offset should be checked. Only when it is
917 * non-zero, it is regarded as present.
919 if (p_child->addin_offset) {
928 * intel_lvds_init - setup LVDS connectors on this device
931 * Create the connector, register the LVDS DDC bus, and try to figure out what
932 * modes we can display on the LVDS panel (if present).
934 void intel_lvds_init(struct drm_device *dev)
936 struct drm_i915_private *dev_priv = dev->dev_private;
937 struct intel_encoder *intel_encoder;
938 struct intel_connector *intel_connector;
939 struct drm_connector *connector;
940 struct drm_encoder *encoder;
941 struct drm_display_mode *scan; /* *modes, *bios_mode; */
942 struct drm_crtc *crtc;
943 struct intel_lvds_priv *lvds_priv;
945 int pipe, gpio = GPIOC;
947 /* Skip init on machines we know falsely report LVDS */
948 if (dmi_check_system(intel_no_lvds))
951 if (!lvds_is_present_in_vbt(dev)) {
952 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
956 if (HAS_PCH_SPLIT(dev)) {
957 if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
959 if (dev_priv->edp_support) {
960 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
966 intel_encoder = kzalloc(sizeof(struct intel_encoder) +
967 sizeof(struct intel_lvds_priv), GFP_KERNEL);
968 if (!intel_encoder) {
972 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
973 if (!intel_connector) {
974 kfree(intel_encoder);
978 connector = &intel_connector->base;
979 encoder = &intel_encoder->enc;
980 drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
981 DRM_MODE_CONNECTOR_LVDS);
983 drm_encoder_init(dev, &intel_encoder->enc, &intel_lvds_enc_funcs,
984 DRM_MODE_ENCODER_LVDS);
986 drm_mode_connector_attach_encoder(&intel_connector->base, &intel_encoder->enc);
987 intel_encoder->type = INTEL_OUTPUT_LVDS;
989 intel_encoder->clone_mask = (1 << INTEL_LVDS_CLONE_BIT);
990 intel_encoder->crtc_mask = (1 << 1);
992 intel_encoder->crtc_mask |= (1 << 0);
993 drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
994 drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
995 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
996 connector->interlace_allowed = false;
997 connector->doublescan_allowed = false;
999 lvds_priv = (struct intel_lvds_priv *)(intel_encoder + 1);
1000 intel_encoder->dev_priv = lvds_priv;
1001 /* create the scaling mode property */
1002 drm_mode_create_scaling_mode_property(dev);
1004 * the initial panel fitting mode will be FULL_SCREEN.
1007 drm_connector_attach_property(&intel_connector->base,
1008 dev->mode_config.scaling_mode_property,
1009 DRM_MODE_SCALE_ASPECT);
1010 lvds_priv->fitting_mode = DRM_MODE_SCALE_ASPECT;
1013 * 1) check for EDID on DDC
1014 * 2) check for VBT data
1015 * 3) check to see if LVDS is already on
1016 * if none of the above, no panel
1017 * 4) make sure lid is open
1018 * if closed, act like it's not there for now
1021 /* Set up the DDC bus. */
1022 intel_encoder->ddc_bus = intel_i2c_create(dev, gpio, "LVDSDDC_C");
1023 if (!intel_encoder->ddc_bus) {
1024 dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
1030 * Attempt to get the fixed panel mode from DDC. Assume that the
1031 * preferred mode is the right one.
1033 dev_priv->lvds_edid_good = true;
1035 if (!intel_ddc_get_modes(connector, intel_encoder->ddc_bus))
1036 dev_priv->lvds_edid_good = false;
1038 list_for_each_entry(scan, &connector->probed_modes, head) {
1039 mutex_lock(&dev->mode_config.mutex);
1040 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
1041 dev_priv->panel_fixed_mode =
1042 drm_mode_duplicate(dev, scan);
1043 mutex_unlock(&dev->mode_config.mutex);
1044 intel_find_lvds_downclock(dev, connector);
1047 mutex_unlock(&dev->mode_config.mutex);
1050 /* Failed to get EDID, what about VBT? */
1051 if (dev_priv->lfp_lvds_vbt_mode) {
1052 mutex_lock(&dev->mode_config.mutex);
1053 dev_priv->panel_fixed_mode =
1054 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
1055 mutex_unlock(&dev->mode_config.mutex);
1056 if (dev_priv->panel_fixed_mode) {
1057 dev_priv->panel_fixed_mode->type |=
1058 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_from_pipe(dev, pipe);
1077 if (crtc && (lvds & LVDS_PORT_EN)) {
1078 dev_priv->panel_fixed_mode = intel_crtc_mode_get(dev, crtc);
1079 if (dev_priv->panel_fixed_mode) {
1080 dev_priv->panel_fixed_mode->type |=
1081 DRM_MODE_TYPE_PREFERRED;
1086 /* If we still don't have a mode after all that, give up. */
1087 if (!dev_priv->panel_fixed_mode)
1091 if (HAS_PCH_SPLIT(dev)) {
1093 /* make sure PWM is enabled */
1094 pwm = I915_READ(BLC_PWM_CPU_CTL2);
1095 pwm |= (PWM_ENABLE | PWM_PIPE_B);
1096 I915_WRITE(BLC_PWM_CPU_CTL2, pwm);
1098 pwm = I915_READ(BLC_PWM_PCH_CTL1);
1099 pwm |= PWM_PCH_ENABLE;
1100 I915_WRITE(BLC_PWM_PCH_CTL1, pwm);
1102 dev_priv->lid_notifier.notifier_call = intel_lid_notify;
1103 if (acpi_lid_notifier_register(&dev_priv->lid_notifier)) {
1104 DRM_DEBUG_KMS("lid notifier registration failed\n");
1105 dev_priv->lid_notifier.notifier_call = NULL;
1107 /* keep the LVDS connector */
1108 dev_priv->int_lvds_connector = connector;
1109 drm_sysfs_connector_add(connector);
1113 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1114 if (intel_encoder->ddc_bus)
1115 intel_i2c_destroy(intel_encoder->ddc_bus);
1116 drm_connector_cleanup(connector);
1117 drm_encoder_cleanup(encoder);
1118 kfree(intel_encoder);
1119 kfree(intel_connector);