2 * Copyright © 2006-2010 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>
28 * Chris Wilson <chris@chris-wilson.co.uk>
31 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
33 #include <linux/moduleparam.h>
34 #include "intel_drv.h"
37 intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
38 struct drm_display_mode *adjusted_mode)
40 drm_mode_copy(adjusted_mode, fixed_mode);
42 drm_mode_set_crtcinfo(adjusted_mode, 0);
46 * intel_find_panel_downclock - find the reduced downclock for LVDS in EDID
48 * @fixed_mode : panel native mode
49 * @connector: LVDS/eDP connector
51 * Return downclock_avail
52 * Find the reduced downclock for LVDS/eDP in EDID.
54 struct drm_display_mode *
55 intel_find_panel_downclock(struct drm_device *dev,
56 struct drm_display_mode *fixed_mode,
57 struct drm_connector *connector)
59 struct drm_display_mode *scan, *tmp_mode;
62 temp_downclock = fixed_mode->clock;
65 list_for_each_entry(scan, &connector->probed_modes, head) {
67 * If one mode has the same resolution with the fixed_panel
68 * mode while they have the different refresh rate, it means
69 * that the reduced downclock is found. In such
70 * case we can set the different FPx0/1 to dynamically select
71 * between low and high frequency.
73 if (scan->hdisplay == fixed_mode->hdisplay &&
74 scan->hsync_start == fixed_mode->hsync_start &&
75 scan->hsync_end == fixed_mode->hsync_end &&
76 scan->htotal == fixed_mode->htotal &&
77 scan->vdisplay == fixed_mode->vdisplay &&
78 scan->vsync_start == fixed_mode->vsync_start &&
79 scan->vsync_end == fixed_mode->vsync_end &&
80 scan->vtotal == fixed_mode->vtotal) {
81 if (scan->clock < temp_downclock) {
83 * The downclock is already found. But we
84 * expect to find the lower downclock.
86 temp_downclock = scan->clock;
92 if (temp_downclock < fixed_mode->clock)
93 return drm_mode_duplicate(dev, tmp_mode);
98 /* adjusted_mode has been preset to be the panel's fixed mode */
100 intel_pch_panel_fitting(struct intel_crtc *intel_crtc,
101 struct intel_crtc_state *pipe_config,
104 struct drm_display_mode *adjusted_mode;
105 int x, y, width, height;
107 adjusted_mode = &pipe_config->base.adjusted_mode;
109 x = y = width = height = 0;
111 /* Native modes don't need fitting */
112 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
113 adjusted_mode->vdisplay == pipe_config->pipe_src_h)
116 switch (fitting_mode) {
117 case DRM_MODE_SCALE_CENTER:
118 width = pipe_config->pipe_src_w;
119 height = pipe_config->pipe_src_h;
120 x = (adjusted_mode->hdisplay - width + 1)/2;
121 y = (adjusted_mode->vdisplay - height + 1)/2;
124 case DRM_MODE_SCALE_ASPECT:
125 /* Scale but preserve the aspect ratio */
127 u32 scaled_width = adjusted_mode->hdisplay
128 * pipe_config->pipe_src_h;
129 u32 scaled_height = pipe_config->pipe_src_w
130 * adjusted_mode->vdisplay;
131 if (scaled_width > scaled_height) { /* pillar */
132 width = scaled_height / pipe_config->pipe_src_h;
135 x = (adjusted_mode->hdisplay - width + 1) / 2;
137 height = adjusted_mode->vdisplay;
138 } else if (scaled_width < scaled_height) { /* letter */
139 height = scaled_width / pipe_config->pipe_src_w;
142 y = (adjusted_mode->vdisplay - height + 1) / 2;
144 width = adjusted_mode->hdisplay;
147 width = adjusted_mode->hdisplay;
148 height = adjusted_mode->vdisplay;
153 case DRM_MODE_SCALE_FULLSCREEN:
155 width = adjusted_mode->hdisplay;
156 height = adjusted_mode->vdisplay;
160 WARN(1, "bad panel fit mode: %d\n", fitting_mode);
165 pipe_config->pch_pfit.pos = (x << 16) | y;
166 pipe_config->pch_pfit.size = (width << 16) | height;
167 pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0;
171 centre_horizontally(struct drm_display_mode *mode,
174 u32 border, sync_pos, blank_width, sync_width;
176 /* keep the hsync and hblank widths constant */
177 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
178 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
179 sync_pos = (blank_width - sync_width + 1) / 2;
181 border = (mode->hdisplay - width + 1) / 2;
182 border += border & 1; /* make the border even */
184 mode->crtc_hdisplay = width;
185 mode->crtc_hblank_start = width + border;
186 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
188 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
189 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
193 centre_vertically(struct drm_display_mode *mode,
196 u32 border, sync_pos, blank_width, sync_width;
198 /* keep the vsync and vblank widths constant */
199 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
200 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
201 sync_pos = (blank_width - sync_width + 1) / 2;
203 border = (mode->vdisplay - height + 1) / 2;
205 mode->crtc_vdisplay = height;
206 mode->crtc_vblank_start = height + border;
207 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
209 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
210 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
213 static inline u32 panel_fitter_scaling(u32 source, u32 target)
216 * Floating point operation is not supported. So the FACTOR
217 * is defined, which can avoid the floating point computation
218 * when calculating the panel ratio.
221 #define FACTOR (1 << ACCURACY)
222 u32 ratio = source * FACTOR / target;
223 return (FACTOR * ratio + FACTOR/2) / FACTOR;
226 static void i965_scale_aspect(struct intel_crtc_state *pipe_config,
229 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
230 u32 scaled_width = adjusted_mode->hdisplay *
231 pipe_config->pipe_src_h;
232 u32 scaled_height = pipe_config->pipe_src_w *
233 adjusted_mode->vdisplay;
235 /* 965+ is easy, it does everything in hw */
236 if (scaled_width > scaled_height)
237 *pfit_control |= PFIT_ENABLE |
239 else if (scaled_width < scaled_height)
240 *pfit_control |= PFIT_ENABLE |
242 else if (adjusted_mode->hdisplay != pipe_config->pipe_src_w)
243 *pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
246 static void i9xx_scale_aspect(struct intel_crtc_state *pipe_config,
247 u32 *pfit_control, u32 *pfit_pgm_ratios,
250 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
251 u32 scaled_width = adjusted_mode->hdisplay *
252 pipe_config->pipe_src_h;
253 u32 scaled_height = pipe_config->pipe_src_w *
254 adjusted_mode->vdisplay;
258 * For earlier chips we have to calculate the scaling
259 * ratio by hand and program it into the
260 * PFIT_PGM_RATIO register
262 if (scaled_width > scaled_height) { /* pillar */
263 centre_horizontally(adjusted_mode,
265 pipe_config->pipe_src_h);
267 *border = LVDS_BORDER_ENABLE;
268 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay) {
269 bits = panel_fitter_scaling(pipe_config->pipe_src_h,
270 adjusted_mode->vdisplay);
272 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
273 bits << PFIT_VERT_SCALE_SHIFT);
274 *pfit_control |= (PFIT_ENABLE |
275 VERT_INTERP_BILINEAR |
276 HORIZ_INTERP_BILINEAR);
278 } else if (scaled_width < scaled_height) { /* letter */
279 centre_vertically(adjusted_mode,
281 pipe_config->pipe_src_w);
283 *border = LVDS_BORDER_ENABLE;
284 if (pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
285 bits = panel_fitter_scaling(pipe_config->pipe_src_w,
286 adjusted_mode->hdisplay);
288 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
289 bits << PFIT_VERT_SCALE_SHIFT);
290 *pfit_control |= (PFIT_ENABLE |
291 VERT_INTERP_BILINEAR |
292 HORIZ_INTERP_BILINEAR);
295 /* Aspects match, Let hw scale both directions */
296 *pfit_control |= (PFIT_ENABLE |
297 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
298 VERT_INTERP_BILINEAR |
299 HORIZ_INTERP_BILINEAR);
303 void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc,
304 struct intel_crtc_state *pipe_config,
307 struct drm_device *dev = intel_crtc->base.dev;
308 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
309 struct drm_display_mode *adjusted_mode;
311 adjusted_mode = &pipe_config->base.adjusted_mode;
313 /* Native modes don't need fitting */
314 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
315 adjusted_mode->vdisplay == pipe_config->pipe_src_h)
318 switch (fitting_mode) {
319 case DRM_MODE_SCALE_CENTER:
321 * For centered modes, we have to calculate border widths &
322 * heights and modify the values programmed into the CRTC.
324 centre_horizontally(adjusted_mode, pipe_config->pipe_src_w);
325 centre_vertically(adjusted_mode, pipe_config->pipe_src_h);
326 border = LVDS_BORDER_ENABLE;
328 case DRM_MODE_SCALE_ASPECT:
329 /* Scale but preserve the aspect ratio */
330 if (INTEL_INFO(dev)->gen >= 4)
331 i965_scale_aspect(pipe_config, &pfit_control);
333 i9xx_scale_aspect(pipe_config, &pfit_control,
334 &pfit_pgm_ratios, &border);
336 case DRM_MODE_SCALE_FULLSCREEN:
338 * Full scaling, even if it changes the aspect ratio.
339 * Fortunately this is all done for us in hw.
341 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay ||
342 pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
343 pfit_control |= PFIT_ENABLE;
344 if (INTEL_INFO(dev)->gen >= 4)
345 pfit_control |= PFIT_SCALING_AUTO;
347 pfit_control |= (VERT_AUTO_SCALE |
348 VERT_INTERP_BILINEAR |
350 HORIZ_INTERP_BILINEAR);
354 WARN(1, "bad panel fit mode: %d\n", fitting_mode);
358 /* 965+ wants fuzzy fitting */
359 /* FIXME: handle multiple panels by failing gracefully */
360 if (INTEL_INFO(dev)->gen >= 4)
361 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
365 if ((pfit_control & PFIT_ENABLE) == 0) {
370 /* Make sure pre-965 set dither correctly for 18bpp panels. */
371 if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18)
372 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
374 pipe_config->gmch_pfit.control = pfit_control;
375 pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios;
376 pipe_config->gmch_pfit.lvds_border_bits = border;
379 enum drm_connector_status
380 intel_panel_detect(struct drm_device *dev)
382 struct drm_i915_private *dev_priv = dev->dev_private;
384 /* Assume that the BIOS does not lie through the OpRegion... */
385 if (!i915.panel_ignore_lid && dev_priv->opregion.lid_state) {
386 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
387 connector_status_connected :
388 connector_status_disconnected;
391 switch (i915.panel_ignore_lid) {
393 return connector_status_connected;
395 return connector_status_disconnected;
397 return connector_status_unknown;
402 * scale - scale values from one range to another
404 * @source_val: value in range [@source_min..@source_max]
406 * Return @source_val in range [@source_min..@source_max] scaled to range
407 * [@target_min..@target_max].
409 static uint32_t scale(uint32_t source_val,
410 uint32_t source_min, uint32_t source_max,
411 uint32_t target_min, uint32_t target_max)
415 WARN_ON(source_min > source_max);
416 WARN_ON(target_min > target_max);
419 source_val = clamp(source_val, source_min, source_max);
421 /* avoid overflows */
422 target_val = DIV_ROUND_CLOSEST_ULL((uint64_t)(source_val - source_min) *
423 (target_max - target_min), source_max - source_min);
424 target_val += target_min;
429 /* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */
430 static inline u32 scale_user_to_hw(struct intel_connector *connector,
431 u32 user_level, u32 user_max)
433 struct intel_panel *panel = &connector->panel;
435 return scale(user_level, 0, user_max,
436 panel->backlight.min, panel->backlight.max);
439 /* Scale user_level in range [0..user_max] to [0..hw_max], clamping the result
440 * to [hw_min..hw_max]. */
441 static inline u32 clamp_user_to_hw(struct intel_connector *connector,
442 u32 user_level, u32 user_max)
444 struct intel_panel *panel = &connector->panel;
447 hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max);
448 hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max);
453 /* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */
454 static inline u32 scale_hw_to_user(struct intel_connector *connector,
455 u32 hw_level, u32 user_max)
457 struct intel_panel *panel = &connector->panel;
459 return scale(hw_level, panel->backlight.min, panel->backlight.max,
463 static u32 intel_panel_compute_brightness(struct intel_connector *connector,
466 struct drm_device *dev = connector->base.dev;
467 struct drm_i915_private *dev_priv = dev->dev_private;
468 struct intel_panel *panel = &connector->panel;
470 WARN_ON(panel->backlight.max == 0);
472 if (i915.invert_brightness < 0)
475 if (i915.invert_brightness > 0 ||
476 dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) {
477 return panel->backlight.max - val;
483 static u32 bdw_get_backlight(struct intel_connector *connector)
485 struct drm_device *dev = connector->base.dev;
486 struct drm_i915_private *dev_priv = dev->dev_private;
488 return I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK;
491 static u32 pch_get_backlight(struct intel_connector *connector)
493 struct drm_device *dev = connector->base.dev;
494 struct drm_i915_private *dev_priv = dev->dev_private;
496 return I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
499 static u32 i9xx_get_backlight(struct intel_connector *connector)
501 struct drm_device *dev = connector->base.dev;
502 struct drm_i915_private *dev_priv = dev->dev_private;
503 struct intel_panel *panel = &connector->panel;
506 val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
507 if (INTEL_INFO(dev)->gen < 4)
510 if (panel->backlight.combination_mode) {
513 pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc);
520 static u32 _vlv_get_backlight(struct drm_device *dev, enum pipe pipe)
522 struct drm_i915_private *dev_priv = dev->dev_private;
524 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
527 return I915_READ(VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK;
530 static u32 vlv_get_backlight(struct intel_connector *connector)
532 struct drm_device *dev = connector->base.dev;
533 enum pipe pipe = intel_get_pipe_from_connector(connector);
535 return _vlv_get_backlight(dev, pipe);
538 static u32 intel_panel_get_backlight(struct intel_connector *connector)
540 struct drm_device *dev = connector->base.dev;
541 struct drm_i915_private *dev_priv = dev->dev_private;
542 struct intel_panel *panel = &connector->panel;
545 mutex_lock(&dev_priv->backlight_lock);
547 if (panel->backlight.enabled) {
548 val = dev_priv->display.get_backlight(connector);
549 val = intel_panel_compute_brightness(connector, val);
552 mutex_unlock(&dev_priv->backlight_lock);
554 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
558 static void bdw_set_backlight(struct intel_connector *connector, u32 level)
560 struct drm_device *dev = connector->base.dev;
561 struct drm_i915_private *dev_priv = dev->dev_private;
562 u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK;
563 I915_WRITE(BLC_PWM_PCH_CTL2, val | level);
566 static void pch_set_backlight(struct intel_connector *connector, u32 level)
568 struct drm_device *dev = connector->base.dev;
569 struct drm_i915_private *dev_priv = dev->dev_private;
572 tmp = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
573 I915_WRITE(BLC_PWM_CPU_CTL, tmp | level);
576 static void i9xx_set_backlight(struct intel_connector *connector, u32 level)
578 struct drm_device *dev = connector->base.dev;
579 struct drm_i915_private *dev_priv = dev->dev_private;
580 struct intel_panel *panel = &connector->panel;
583 WARN_ON(panel->backlight.max == 0);
585 if (panel->backlight.combination_mode) {
588 lbpc = level * 0xfe / panel->backlight.max + 1;
590 pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
594 mask = BACKLIGHT_DUTY_CYCLE_MASK;
597 mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV;
600 tmp = I915_READ(BLC_PWM_CTL) & ~mask;
601 I915_WRITE(BLC_PWM_CTL, tmp | level);
604 static void vlv_set_backlight(struct intel_connector *connector, u32 level)
606 struct drm_device *dev = connector->base.dev;
607 struct drm_i915_private *dev_priv = dev->dev_private;
608 enum pipe pipe = intel_get_pipe_from_connector(connector);
611 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
614 tmp = I915_READ(VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK;
615 I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level);
619 intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level)
621 struct drm_device *dev = connector->base.dev;
622 struct drm_i915_private *dev_priv = dev->dev_private;
624 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
626 level = intel_panel_compute_brightness(connector, level);
627 dev_priv->display.set_backlight(connector, level);
630 /* set backlight brightness to level in range [0..max], scaling wrt hw min */
631 static void intel_panel_set_backlight(struct intel_connector *connector,
632 u32 user_level, u32 user_max)
634 struct drm_device *dev = connector->base.dev;
635 struct drm_i915_private *dev_priv = dev->dev_private;
636 struct intel_panel *panel = &connector->panel;
639 if (!panel->backlight.present)
642 mutex_lock(&dev_priv->backlight_lock);
644 WARN_ON(panel->backlight.max == 0);
646 hw_level = scale_user_to_hw(connector, user_level, user_max);
647 panel->backlight.level = hw_level;
649 if (panel->backlight.enabled)
650 intel_panel_actually_set_backlight(connector, hw_level);
652 mutex_unlock(&dev_priv->backlight_lock);
655 /* set backlight brightness to level in range [0..max], assuming hw min is
658 void intel_panel_set_backlight_acpi(struct intel_connector *connector,
659 u32 user_level, u32 user_max)
661 struct drm_device *dev = connector->base.dev;
662 struct drm_i915_private *dev_priv = dev->dev_private;
663 struct intel_panel *panel = &connector->panel;
664 enum pipe pipe = intel_get_pipe_from_connector(connector);
668 * INVALID_PIPE may occur during driver init because
669 * connection_mutex isn't held across the entire backlight
670 * setup + modeset readout, and the BIOS can issue the
671 * requests at any time.
673 if (!panel->backlight.present || pipe == INVALID_PIPE)
676 mutex_lock(&dev_priv->backlight_lock);
678 WARN_ON(panel->backlight.max == 0);
680 hw_level = clamp_user_to_hw(connector, user_level, user_max);
681 panel->backlight.level = hw_level;
683 if (panel->backlight.device)
684 panel->backlight.device->props.brightness =
685 scale_hw_to_user(connector,
686 panel->backlight.level,
687 panel->backlight.device->props.max_brightness);
689 if (panel->backlight.enabled)
690 intel_panel_actually_set_backlight(connector, hw_level);
692 mutex_unlock(&dev_priv->backlight_lock);
695 static void pch_disable_backlight(struct intel_connector *connector)
697 struct drm_device *dev = connector->base.dev;
698 struct drm_i915_private *dev_priv = dev->dev_private;
701 intel_panel_actually_set_backlight(connector, 0);
703 tmp = I915_READ(BLC_PWM_CPU_CTL2);
704 I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE);
706 tmp = I915_READ(BLC_PWM_PCH_CTL1);
707 I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE);
710 static void i9xx_disable_backlight(struct intel_connector *connector)
712 intel_panel_actually_set_backlight(connector, 0);
715 static void i965_disable_backlight(struct intel_connector *connector)
717 struct drm_device *dev = connector->base.dev;
718 struct drm_i915_private *dev_priv = dev->dev_private;
721 intel_panel_actually_set_backlight(connector, 0);
723 tmp = I915_READ(BLC_PWM_CTL2);
724 I915_WRITE(BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE);
727 static void vlv_disable_backlight(struct intel_connector *connector)
729 struct drm_device *dev = connector->base.dev;
730 struct drm_i915_private *dev_priv = dev->dev_private;
731 enum pipe pipe = intel_get_pipe_from_connector(connector);
734 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
737 intel_panel_actually_set_backlight(connector, 0);
739 tmp = I915_READ(VLV_BLC_PWM_CTL2(pipe));
740 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE);
743 void intel_panel_disable_backlight(struct intel_connector *connector)
745 struct drm_device *dev = connector->base.dev;
746 struct drm_i915_private *dev_priv = dev->dev_private;
747 struct intel_panel *panel = &connector->panel;
749 if (!panel->backlight.present)
753 * Do not disable backlight on the vgaswitcheroo path. When switching
754 * away from i915, the other client may depend on i915 to handle the
755 * backlight. This will leave the backlight on unnecessarily when
756 * another client is not activated.
758 if (dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) {
759 DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n");
763 mutex_lock(&dev_priv->backlight_lock);
765 if (panel->backlight.device)
766 panel->backlight.device->props.power = FB_BLANK_POWERDOWN;
767 panel->backlight.enabled = false;
768 dev_priv->display.disable_backlight(connector);
770 mutex_unlock(&dev_priv->backlight_lock);
773 static void bdw_enable_backlight(struct intel_connector *connector)
775 struct drm_device *dev = connector->base.dev;
776 struct drm_i915_private *dev_priv = dev->dev_private;
777 struct intel_panel *panel = &connector->panel;
778 u32 pch_ctl1, pch_ctl2;
780 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
781 if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
782 DRM_DEBUG_KMS("pch backlight already enabled\n");
783 pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
784 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
787 pch_ctl2 = panel->backlight.max << 16;
788 I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
791 if (panel->backlight.active_low_pwm)
792 pch_ctl1 |= BLM_PCH_POLARITY;
794 /* After LPT, override is the default. */
795 if (HAS_PCH_LPT(dev_priv))
796 pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE;
798 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
799 POSTING_READ(BLC_PWM_PCH_CTL1);
800 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
802 /* This won't stick until the above enable. */
803 intel_panel_actually_set_backlight(connector, panel->backlight.level);
806 static void pch_enable_backlight(struct intel_connector *connector)
808 struct drm_device *dev = connector->base.dev;
809 struct drm_i915_private *dev_priv = dev->dev_private;
810 struct intel_panel *panel = &connector->panel;
811 enum pipe pipe = intel_get_pipe_from_connector(connector);
812 enum transcoder cpu_transcoder =
813 intel_pipe_to_cpu_transcoder(dev_priv, pipe);
814 u32 cpu_ctl2, pch_ctl1, pch_ctl2;
816 cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
817 if (cpu_ctl2 & BLM_PWM_ENABLE) {
818 DRM_DEBUG_KMS("cpu backlight already enabled\n");
819 cpu_ctl2 &= ~BLM_PWM_ENABLE;
820 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
823 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
824 if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
825 DRM_DEBUG_KMS("pch backlight already enabled\n");
826 pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
827 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
830 if (cpu_transcoder == TRANSCODER_EDP)
831 cpu_ctl2 = BLM_TRANSCODER_EDP;
833 cpu_ctl2 = BLM_PIPE(cpu_transcoder);
834 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
835 POSTING_READ(BLC_PWM_CPU_CTL2);
836 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE);
838 /* This won't stick until the above enable. */
839 intel_panel_actually_set_backlight(connector, panel->backlight.level);
841 pch_ctl2 = panel->backlight.max << 16;
842 I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
845 if (panel->backlight.active_low_pwm)
846 pch_ctl1 |= BLM_PCH_POLARITY;
848 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
849 POSTING_READ(BLC_PWM_PCH_CTL1);
850 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
853 static void i9xx_enable_backlight(struct intel_connector *connector)
855 struct drm_device *dev = connector->base.dev;
856 struct drm_i915_private *dev_priv = dev->dev_private;
857 struct intel_panel *panel = &connector->panel;
860 ctl = I915_READ(BLC_PWM_CTL);
861 if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) {
862 DRM_DEBUG_KMS("backlight already enabled\n");
863 I915_WRITE(BLC_PWM_CTL, 0);
866 freq = panel->backlight.max;
867 if (panel->backlight.combination_mode)
871 if (panel->backlight.combination_mode)
872 ctl |= BLM_LEGACY_MODE;
873 if (IS_PINEVIEW(dev) && panel->backlight.active_low_pwm)
874 ctl |= BLM_POLARITY_PNV;
876 I915_WRITE(BLC_PWM_CTL, ctl);
877 POSTING_READ(BLC_PWM_CTL);
879 /* XXX: combine this into above write? */
880 intel_panel_actually_set_backlight(connector, panel->backlight.level);
883 static void i965_enable_backlight(struct intel_connector *connector)
885 struct drm_device *dev = connector->base.dev;
886 struct drm_i915_private *dev_priv = dev->dev_private;
887 struct intel_panel *panel = &connector->panel;
888 enum pipe pipe = intel_get_pipe_from_connector(connector);
891 ctl2 = I915_READ(BLC_PWM_CTL2);
892 if (ctl2 & BLM_PWM_ENABLE) {
893 DRM_DEBUG_KMS("backlight already enabled\n");
894 ctl2 &= ~BLM_PWM_ENABLE;
895 I915_WRITE(BLC_PWM_CTL2, ctl2);
898 freq = panel->backlight.max;
899 if (panel->backlight.combination_mode)
903 I915_WRITE(BLC_PWM_CTL, ctl);
905 ctl2 = BLM_PIPE(pipe);
906 if (panel->backlight.combination_mode)
907 ctl2 |= BLM_COMBINATION_MODE;
908 if (panel->backlight.active_low_pwm)
909 ctl2 |= BLM_POLARITY_I965;
910 I915_WRITE(BLC_PWM_CTL2, ctl2);
911 POSTING_READ(BLC_PWM_CTL2);
912 I915_WRITE(BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE);
914 intel_panel_actually_set_backlight(connector, panel->backlight.level);
917 static void vlv_enable_backlight(struct intel_connector *connector)
919 struct drm_device *dev = connector->base.dev;
920 struct drm_i915_private *dev_priv = dev->dev_private;
921 struct intel_panel *panel = &connector->panel;
922 enum pipe pipe = intel_get_pipe_from_connector(connector);
925 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
928 ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe));
929 if (ctl2 & BLM_PWM_ENABLE) {
930 DRM_DEBUG_KMS("backlight already enabled\n");
931 ctl2 &= ~BLM_PWM_ENABLE;
932 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
935 ctl = panel->backlight.max << 16;
936 I915_WRITE(VLV_BLC_PWM_CTL(pipe), ctl);
938 /* XXX: combine this into above write? */
939 intel_panel_actually_set_backlight(connector, panel->backlight.level);
942 if (panel->backlight.active_low_pwm)
943 ctl2 |= BLM_POLARITY_I965;
944 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
945 POSTING_READ(VLV_BLC_PWM_CTL2(pipe));
946 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE);
949 void intel_panel_enable_backlight(struct intel_connector *connector)
951 struct drm_device *dev = connector->base.dev;
952 struct drm_i915_private *dev_priv = dev->dev_private;
953 struct intel_panel *panel = &connector->panel;
954 enum pipe pipe = intel_get_pipe_from_connector(connector);
956 if (!panel->backlight.present)
959 DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));
961 mutex_lock(&dev_priv->backlight_lock);
963 WARN_ON(panel->backlight.max == 0);
965 if (panel->backlight.level <= panel->backlight.min) {
966 panel->backlight.level = panel->backlight.max;
967 if (panel->backlight.device)
968 panel->backlight.device->props.brightness =
969 scale_hw_to_user(connector,
970 panel->backlight.level,
971 panel->backlight.device->props.max_brightness);
974 dev_priv->display.enable_backlight(connector);
975 panel->backlight.enabled = true;
976 if (panel->backlight.device)
977 panel->backlight.device->props.power = FB_BLANK_UNBLANK;
979 mutex_unlock(&dev_priv->backlight_lock);
982 #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
983 static int intel_backlight_device_update_status(struct backlight_device *bd)
985 struct intel_connector *connector = bl_get_data(bd);
986 struct intel_panel *panel = &connector->panel;
987 struct drm_device *dev = connector->base.dev;
989 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
990 DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n",
991 bd->props.brightness, bd->props.max_brightness);
992 intel_panel_set_backlight(connector, bd->props.brightness,
993 bd->props.max_brightness);
996 * Allow flipping bl_power as a sub-state of enabled. Sadly the
997 * backlight class device does not make it easy to to differentiate
998 * between callbacks for brightness and bl_power, so our backlight_power
999 * callback needs to take this into account.
1001 if (panel->backlight.enabled) {
1002 if (panel->backlight_power) {
1003 bool enable = bd->props.power == FB_BLANK_UNBLANK &&
1004 bd->props.brightness != 0;
1005 panel->backlight_power(connector, enable);
1008 bd->props.power = FB_BLANK_POWERDOWN;
1011 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1015 static int intel_backlight_device_get_brightness(struct backlight_device *bd)
1017 struct intel_connector *connector = bl_get_data(bd);
1018 struct drm_device *dev = connector->base.dev;
1019 struct drm_i915_private *dev_priv = dev->dev_private;
1023 intel_runtime_pm_get(dev_priv);
1024 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1026 hw_level = intel_panel_get_backlight(connector);
1027 ret = scale_hw_to_user(connector, hw_level, bd->props.max_brightness);
1029 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1030 intel_runtime_pm_put(dev_priv);
1035 static const struct backlight_ops intel_backlight_device_ops = {
1036 .update_status = intel_backlight_device_update_status,
1037 .get_brightness = intel_backlight_device_get_brightness,
1040 static int intel_backlight_device_register(struct intel_connector *connector)
1042 struct intel_panel *panel = &connector->panel;
1043 struct backlight_properties props;
1045 if (WARN_ON(panel->backlight.device))
1048 if (!panel->backlight.present)
1051 WARN_ON(panel->backlight.max == 0);
1053 memset(&props, 0, sizeof(props));
1054 props.type = BACKLIGHT_RAW;
1057 * Note: Everything should work even if the backlight device max
1058 * presented to the userspace is arbitrarily chosen.
1060 props.max_brightness = panel->backlight.max;
1061 props.brightness = scale_hw_to_user(connector,
1062 panel->backlight.level,
1063 props.max_brightness);
1065 if (panel->backlight.enabled)
1066 props.power = FB_BLANK_UNBLANK;
1068 props.power = FB_BLANK_POWERDOWN;
1071 * Note: using the same name independent of the connector prevents
1072 * registration of multiple backlight devices in the driver.
1074 panel->backlight.device =
1075 backlight_device_register("intel_backlight",
1076 connector->base.kdev,
1078 &intel_backlight_device_ops, &props);
1080 if (IS_ERR(panel->backlight.device)) {
1081 DRM_ERROR("Failed to register backlight: %ld\n",
1082 PTR_ERR(panel->backlight.device));
1083 panel->backlight.device = NULL;
1087 DRM_DEBUG_KMS("Connector %s backlight sysfs interface registered\n",
1088 connector->base.name);
1093 static void intel_backlight_device_unregister(struct intel_connector *connector)
1095 struct intel_panel *panel = &connector->panel;
1097 if (panel->backlight.device) {
1098 backlight_device_unregister(panel->backlight.device);
1099 panel->backlight.device = NULL;
1102 #else /* CONFIG_BACKLIGHT_CLASS_DEVICE */
1103 static int intel_backlight_device_register(struct intel_connector *connector)
1107 static void intel_backlight_device_unregister(struct intel_connector *connector)
1110 #endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */
1113 * Note: The setup hooks can't assume pipe is set!
1115 * XXX: Query mode clock or hardware clock and program PWM modulation frequency
1116 * appropriately when it's 0. Use VBT and/or sane defaults.
1118 static u32 get_backlight_min_vbt(struct intel_connector *connector)
1120 struct drm_device *dev = connector->base.dev;
1121 struct drm_i915_private *dev_priv = dev->dev_private;
1122 struct intel_panel *panel = &connector->panel;
1125 WARN_ON(panel->backlight.max == 0);
1128 * XXX: If the vbt value is 255, it makes min equal to max, which leads
1129 * to problems. There are such machines out there. Either our
1130 * interpretation is wrong or the vbt has bogus data. Or both. Safeguard
1131 * against this by letting the minimum be at most (arbitrarily chosen)
1134 min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64);
1135 if (min != dev_priv->vbt.backlight.min_brightness) {
1136 DRM_DEBUG_KMS("clamping VBT min backlight %d/255 to %d/255\n",
1137 dev_priv->vbt.backlight.min_brightness, min);
1140 /* vbt value is a coefficient in range [0..255] */
1141 return scale(min, 0, 255, 0, panel->backlight.max);
1144 static int bdw_setup_backlight(struct intel_connector *connector, enum pipe unused)
1146 struct drm_device *dev = connector->base.dev;
1147 struct drm_i915_private *dev_priv = dev->dev_private;
1148 struct intel_panel *panel = &connector->panel;
1149 u32 pch_ctl1, pch_ctl2, val;
1151 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
1152 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;
1154 pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
1155 panel->backlight.max = pch_ctl2 >> 16;
1156 if (!panel->backlight.max)
1159 panel->backlight.min = get_backlight_min_vbt(connector);
1161 val = bdw_get_backlight(connector);
1162 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1164 panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) &&
1165 panel->backlight.level != 0;
1170 static int pch_setup_backlight(struct intel_connector *connector, enum pipe unused)
1172 struct drm_device *dev = connector->base.dev;
1173 struct drm_i915_private *dev_priv = dev->dev_private;
1174 struct intel_panel *panel = &connector->panel;
1175 u32 cpu_ctl2, pch_ctl1, pch_ctl2, val;
1177 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
1178 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;
1180 pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
1181 panel->backlight.max = pch_ctl2 >> 16;
1182 if (!panel->backlight.max)
1185 panel->backlight.min = get_backlight_min_vbt(connector);
1187 val = pch_get_backlight(connector);
1188 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1190 cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
1191 panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) &&
1192 (pch_ctl1 & BLM_PCH_PWM_ENABLE) && panel->backlight.level != 0;
1197 static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unused)
1199 struct drm_device *dev = connector->base.dev;
1200 struct drm_i915_private *dev_priv = dev->dev_private;
1201 struct intel_panel *panel = &connector->panel;
1204 ctl = I915_READ(BLC_PWM_CTL);
1206 if (IS_GEN2(dev) || IS_I915GM(dev) || IS_I945GM(dev))
1207 panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE;
1209 if (IS_PINEVIEW(dev))
1210 panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV;
1212 panel->backlight.max = ctl >> 17;
1213 if (panel->backlight.combination_mode)
1214 panel->backlight.max *= 0xff;
1216 if (!panel->backlight.max)
1219 panel->backlight.min = get_backlight_min_vbt(connector);
1221 val = i9xx_get_backlight(connector);
1222 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1224 panel->backlight.enabled = panel->backlight.level != 0;
1229 static int i965_setup_backlight(struct intel_connector *connector, enum pipe unused)
1231 struct drm_device *dev = connector->base.dev;
1232 struct drm_i915_private *dev_priv = dev->dev_private;
1233 struct intel_panel *panel = &connector->panel;
1236 ctl2 = I915_READ(BLC_PWM_CTL2);
1237 panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE;
1238 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;
1240 ctl = I915_READ(BLC_PWM_CTL);
1241 panel->backlight.max = ctl >> 16;
1242 if (panel->backlight.combination_mode)
1243 panel->backlight.max *= 0xff;
1245 if (!panel->backlight.max)
1248 panel->backlight.min = get_backlight_min_vbt(connector);
1250 val = i9xx_get_backlight(connector);
1251 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1253 panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&
1254 panel->backlight.level != 0;
1259 static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe)
1261 struct drm_device *dev = connector->base.dev;
1262 struct drm_i915_private *dev_priv = dev->dev_private;
1263 struct intel_panel *panel = &connector->panel;
1267 for_each_pipe(dev_priv, p) {
1268 u32 cur_val = I915_READ(VLV_BLC_PWM_CTL(p));
1270 /* Skip if the modulation freq is already set */
1271 if (cur_val & ~BACKLIGHT_DUTY_CYCLE_MASK)
1274 cur_val &= BACKLIGHT_DUTY_CYCLE_MASK;
1275 I915_WRITE(VLV_BLC_PWM_CTL(p), (0xf42 << 16) |
1279 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
1282 ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe));
1283 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;
1285 ctl = I915_READ(VLV_BLC_PWM_CTL(pipe));
1286 panel->backlight.max = ctl >> 16;
1287 if (!panel->backlight.max)
1290 panel->backlight.min = get_backlight_min_vbt(connector);
1292 val = _vlv_get_backlight(dev, pipe);
1293 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1295 panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&
1296 panel->backlight.level != 0;
1301 int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe)
1303 struct drm_device *dev = connector->dev;
1304 struct drm_i915_private *dev_priv = dev->dev_private;
1305 struct intel_connector *intel_connector = to_intel_connector(connector);
1306 struct intel_panel *panel = &intel_connector->panel;
1309 if (!dev_priv->vbt.backlight.present) {
1310 if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) {
1311 DRM_DEBUG_KMS("no backlight present per VBT, but present per quirk\n");
1313 DRM_DEBUG_KMS("no backlight present per VBT\n");
1318 /* set level and max in panel struct */
1319 mutex_lock(&dev_priv->backlight_lock);
1320 ret = dev_priv->display.setup_backlight(intel_connector, pipe);
1321 mutex_unlock(&dev_priv->backlight_lock);
1324 DRM_DEBUG_KMS("failed to setup backlight for connector %s\n",
1329 panel->backlight.present = true;
1331 DRM_DEBUG_KMS("Connector %s backlight initialized, %s, brightness %u/%u\n",
1333 panel->backlight.enabled ? "enabled" : "disabled",
1334 panel->backlight.level, panel->backlight.max);
1339 void intel_panel_destroy_backlight(struct drm_connector *connector)
1341 struct intel_connector *intel_connector = to_intel_connector(connector);
1342 struct intel_panel *panel = &intel_connector->panel;
1344 panel->backlight.present = false;
1347 /* Set up chip specific backlight functions */
1348 void intel_panel_init_backlight_funcs(struct drm_device *dev)
1350 struct drm_i915_private *dev_priv = dev->dev_private;
1352 if (IS_BROADWELL(dev) || (INTEL_INFO(dev)->gen >= 9)) {
1353 dev_priv->display.setup_backlight = bdw_setup_backlight;
1354 dev_priv->display.enable_backlight = bdw_enable_backlight;
1355 dev_priv->display.disable_backlight = pch_disable_backlight;
1356 dev_priv->display.set_backlight = bdw_set_backlight;
1357 dev_priv->display.get_backlight = bdw_get_backlight;
1358 } else if (HAS_PCH_SPLIT(dev)) {
1359 dev_priv->display.setup_backlight = pch_setup_backlight;
1360 dev_priv->display.enable_backlight = pch_enable_backlight;
1361 dev_priv->display.disable_backlight = pch_disable_backlight;
1362 dev_priv->display.set_backlight = pch_set_backlight;
1363 dev_priv->display.get_backlight = pch_get_backlight;
1364 } else if (IS_VALLEYVIEW(dev)) {
1365 dev_priv->display.setup_backlight = vlv_setup_backlight;
1366 dev_priv->display.enable_backlight = vlv_enable_backlight;
1367 dev_priv->display.disable_backlight = vlv_disable_backlight;
1368 dev_priv->display.set_backlight = vlv_set_backlight;
1369 dev_priv->display.get_backlight = vlv_get_backlight;
1370 } else if (IS_GEN4(dev)) {
1371 dev_priv->display.setup_backlight = i965_setup_backlight;
1372 dev_priv->display.enable_backlight = i965_enable_backlight;
1373 dev_priv->display.disable_backlight = i965_disable_backlight;
1374 dev_priv->display.set_backlight = i9xx_set_backlight;
1375 dev_priv->display.get_backlight = i9xx_get_backlight;
1377 dev_priv->display.setup_backlight = i9xx_setup_backlight;
1378 dev_priv->display.enable_backlight = i9xx_enable_backlight;
1379 dev_priv->display.disable_backlight = i9xx_disable_backlight;
1380 dev_priv->display.set_backlight = i9xx_set_backlight;
1381 dev_priv->display.get_backlight = i9xx_get_backlight;
1385 int intel_panel_init(struct intel_panel *panel,
1386 struct drm_display_mode *fixed_mode,
1387 struct drm_display_mode *downclock_mode)
1389 panel->fixed_mode = fixed_mode;
1390 panel->downclock_mode = downclock_mode;
1395 void intel_panel_fini(struct intel_panel *panel)
1397 struct intel_connector *intel_connector =
1398 container_of(panel, struct intel_connector, panel);
1400 if (panel->fixed_mode)
1401 drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);
1403 if (panel->downclock_mode)
1404 drm_mode_destroy(intel_connector->base.dev,
1405 panel->downclock_mode);
1408 void intel_backlight_register(struct drm_device *dev)
1410 struct intel_connector *connector;
1412 list_for_each_entry(connector, &dev->mode_config.connector_list, base.head)
1413 intel_backlight_device_register(connector);
1416 void intel_backlight_unregister(struct drm_device *dev)
1418 struct intel_connector *connector;
1420 list_for_each_entry(connector, &dev->mode_config.connector_list, base.head)
1421 intel_backlight_device_unregister(connector);