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"
36 #define PCI_LBPC 0xf4 /* legacy/combination backlight modes */
39 intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
40 struct drm_display_mode *adjusted_mode)
42 drm_mode_copy(adjusted_mode, fixed_mode);
44 drm_mode_set_crtcinfo(adjusted_mode, 0);
47 /* adjusted_mode has been preset to be the panel's fixed mode */
49 intel_pch_panel_fitting(struct intel_crtc *intel_crtc,
50 struct intel_crtc_config *pipe_config,
53 struct drm_display_mode *adjusted_mode;
54 int x, y, width, height;
56 adjusted_mode = &pipe_config->adjusted_mode;
58 x = y = width = height = 0;
60 /* Native modes don't need fitting */
61 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
62 adjusted_mode->vdisplay == pipe_config->pipe_src_h)
65 switch (fitting_mode) {
66 case DRM_MODE_SCALE_CENTER:
67 width = pipe_config->pipe_src_w;
68 height = pipe_config->pipe_src_h;
69 x = (adjusted_mode->hdisplay - width + 1)/2;
70 y = (adjusted_mode->vdisplay - height + 1)/2;
73 case DRM_MODE_SCALE_ASPECT:
74 /* Scale but preserve the aspect ratio */
76 u32 scaled_width = adjusted_mode->hdisplay
77 * pipe_config->pipe_src_h;
78 u32 scaled_height = pipe_config->pipe_src_w
79 * adjusted_mode->vdisplay;
80 if (scaled_width > scaled_height) { /* pillar */
81 width = scaled_height / pipe_config->pipe_src_h;
84 x = (adjusted_mode->hdisplay - width + 1) / 2;
86 height = adjusted_mode->vdisplay;
87 } else if (scaled_width < scaled_height) { /* letter */
88 height = scaled_width / pipe_config->pipe_src_w;
91 y = (adjusted_mode->vdisplay - height + 1) / 2;
93 width = adjusted_mode->hdisplay;
96 width = adjusted_mode->hdisplay;
97 height = adjusted_mode->vdisplay;
102 case DRM_MODE_SCALE_FULLSCREEN:
104 width = adjusted_mode->hdisplay;
105 height = adjusted_mode->vdisplay;
109 WARN(1, "bad panel fit mode: %d\n", fitting_mode);
114 pipe_config->pch_pfit.pos = (x << 16) | y;
115 pipe_config->pch_pfit.size = (width << 16) | height;
116 pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0;
120 centre_horizontally(struct drm_display_mode *mode,
123 u32 border, sync_pos, blank_width, sync_width;
125 /* keep the hsync and hblank widths constant */
126 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
127 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
128 sync_pos = (blank_width - sync_width + 1) / 2;
130 border = (mode->hdisplay - width + 1) / 2;
131 border += border & 1; /* make the border even */
133 mode->crtc_hdisplay = width;
134 mode->crtc_hblank_start = width + border;
135 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
137 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
138 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
142 centre_vertically(struct drm_display_mode *mode,
145 u32 border, sync_pos, blank_width, sync_width;
147 /* keep the vsync and vblank widths constant */
148 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
149 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
150 sync_pos = (blank_width - sync_width + 1) / 2;
152 border = (mode->vdisplay - height + 1) / 2;
154 mode->crtc_vdisplay = height;
155 mode->crtc_vblank_start = height + border;
156 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
158 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
159 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
162 static inline u32 panel_fitter_scaling(u32 source, u32 target)
165 * Floating point operation is not supported. So the FACTOR
166 * is defined, which can avoid the floating point computation
167 * when calculating the panel ratio.
170 #define FACTOR (1 << ACCURACY)
171 u32 ratio = source * FACTOR / target;
172 return (FACTOR * ratio + FACTOR/2) / FACTOR;
175 static void i965_scale_aspect(struct intel_crtc_config *pipe_config,
178 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
179 u32 scaled_width = adjusted_mode->hdisplay *
180 pipe_config->pipe_src_h;
181 u32 scaled_height = pipe_config->pipe_src_w *
182 adjusted_mode->vdisplay;
184 /* 965+ is easy, it does everything in hw */
185 if (scaled_width > scaled_height)
186 *pfit_control |= PFIT_ENABLE |
188 else if (scaled_width < scaled_height)
189 *pfit_control |= PFIT_ENABLE |
191 else if (adjusted_mode->hdisplay != pipe_config->pipe_src_w)
192 *pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
195 static void i9xx_scale_aspect(struct intel_crtc_config *pipe_config,
196 u32 *pfit_control, u32 *pfit_pgm_ratios,
199 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
200 u32 scaled_width = adjusted_mode->hdisplay *
201 pipe_config->pipe_src_h;
202 u32 scaled_height = pipe_config->pipe_src_w *
203 adjusted_mode->vdisplay;
207 * For earlier chips we have to calculate the scaling
208 * ratio by hand and program it into the
209 * PFIT_PGM_RATIO register
211 if (scaled_width > scaled_height) { /* pillar */
212 centre_horizontally(adjusted_mode,
214 pipe_config->pipe_src_h);
216 *border = LVDS_BORDER_ENABLE;
217 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay) {
218 bits = panel_fitter_scaling(pipe_config->pipe_src_h,
219 adjusted_mode->vdisplay);
221 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
222 bits << PFIT_VERT_SCALE_SHIFT);
223 *pfit_control |= (PFIT_ENABLE |
224 VERT_INTERP_BILINEAR |
225 HORIZ_INTERP_BILINEAR);
227 } else if (scaled_width < scaled_height) { /* letter */
228 centre_vertically(adjusted_mode,
230 pipe_config->pipe_src_w);
232 *border = LVDS_BORDER_ENABLE;
233 if (pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
234 bits = panel_fitter_scaling(pipe_config->pipe_src_w,
235 adjusted_mode->hdisplay);
237 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
238 bits << PFIT_VERT_SCALE_SHIFT);
239 *pfit_control |= (PFIT_ENABLE |
240 VERT_INTERP_BILINEAR |
241 HORIZ_INTERP_BILINEAR);
244 /* Aspects match, Let hw scale both directions */
245 *pfit_control |= (PFIT_ENABLE |
246 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
247 VERT_INTERP_BILINEAR |
248 HORIZ_INTERP_BILINEAR);
252 void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc,
253 struct intel_crtc_config *pipe_config,
256 struct drm_device *dev = intel_crtc->base.dev;
257 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
258 struct drm_display_mode *adjusted_mode;
260 adjusted_mode = &pipe_config->adjusted_mode;
262 /* Native modes don't need fitting */
263 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
264 adjusted_mode->vdisplay == pipe_config->pipe_src_h)
267 switch (fitting_mode) {
268 case DRM_MODE_SCALE_CENTER:
270 * For centered modes, we have to calculate border widths &
271 * heights and modify the values programmed into the CRTC.
273 centre_horizontally(adjusted_mode, pipe_config->pipe_src_w);
274 centre_vertically(adjusted_mode, pipe_config->pipe_src_h);
275 border = LVDS_BORDER_ENABLE;
277 case DRM_MODE_SCALE_ASPECT:
278 /* Scale but preserve the aspect ratio */
279 if (INTEL_INFO(dev)->gen >= 4)
280 i965_scale_aspect(pipe_config, &pfit_control);
282 i9xx_scale_aspect(pipe_config, &pfit_control,
283 &pfit_pgm_ratios, &border);
285 case DRM_MODE_SCALE_FULLSCREEN:
287 * Full scaling, even if it changes the aspect ratio.
288 * Fortunately this is all done for us in hw.
290 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay ||
291 pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
292 pfit_control |= PFIT_ENABLE;
293 if (INTEL_INFO(dev)->gen >= 4)
294 pfit_control |= PFIT_SCALING_AUTO;
296 pfit_control |= (VERT_AUTO_SCALE |
297 VERT_INTERP_BILINEAR |
299 HORIZ_INTERP_BILINEAR);
303 WARN(1, "bad panel fit mode: %d\n", fitting_mode);
307 /* 965+ wants fuzzy fitting */
308 /* FIXME: handle multiple panels by failing gracefully */
309 if (INTEL_INFO(dev)->gen >= 4)
310 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
314 if ((pfit_control & PFIT_ENABLE) == 0) {
319 /* Make sure pre-965 set dither correctly for 18bpp panels. */
320 if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18)
321 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
323 pipe_config->gmch_pfit.control = pfit_control;
324 pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios;
325 pipe_config->gmch_pfit.lvds_border_bits = border;
328 static int is_backlight_combination_mode(struct drm_device *dev)
330 struct drm_i915_private *dev_priv = dev->dev_private;
333 return I915_READ(BLC_PWM_CTL2) & BLM_COMBINATION_MODE;
336 return I915_READ(BLC_PWM_CTL) & BLM_LEGACY_MODE;
341 /* XXX: query mode clock or hardware clock and program max PWM appropriately
344 static u32 i915_read_blc_pwm_ctl(struct drm_device *dev)
346 struct drm_i915_private *dev_priv = dev->dev_private;
349 WARN_ON_SMP(!spin_is_locked(&dev_priv->backlight.lock));
351 /* Restore the CTL value if it lost, e.g. GPU reset */
353 if (HAS_PCH_SPLIT(dev_priv->dev)) {
354 val = I915_READ(BLC_PWM_PCH_CTL2);
355 if (dev_priv->regfile.saveBLC_PWM_CTL2 == 0) {
356 dev_priv->regfile.saveBLC_PWM_CTL2 = val;
357 } else if (val == 0) {
358 val = dev_priv->regfile.saveBLC_PWM_CTL2;
359 I915_WRITE(BLC_PWM_PCH_CTL2, val);
362 val = I915_READ(BLC_PWM_CTL);
363 if (dev_priv->regfile.saveBLC_PWM_CTL == 0) {
364 dev_priv->regfile.saveBLC_PWM_CTL = val;
365 if (INTEL_INFO(dev)->gen >= 4)
366 dev_priv->regfile.saveBLC_PWM_CTL2 =
367 I915_READ(BLC_PWM_CTL2);
368 } else if (val == 0) {
369 val = dev_priv->regfile.saveBLC_PWM_CTL;
370 I915_WRITE(BLC_PWM_CTL, val);
371 if (INTEL_INFO(dev)->gen >= 4)
372 I915_WRITE(BLC_PWM_CTL2,
373 dev_priv->regfile.saveBLC_PWM_CTL2);
376 if (IS_VALLEYVIEW(dev) && !val)
383 static u32 intel_panel_get_max_backlight(struct drm_device *dev)
387 max = i915_read_blc_pwm_ctl(dev);
389 if (HAS_PCH_SPLIT(dev)) {
392 if (INTEL_INFO(dev)->gen < 4)
397 if (is_backlight_combination_mode(dev))
401 DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max);
406 static int i915_panel_invert_brightness;
407 MODULE_PARM_DESC(invert_brightness, "Invert backlight brightness "
408 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
409 "report PCI device ID, subsystem vendor and subsystem device ID "
410 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
411 "It will then be included in an upcoming module version.");
412 module_param_named(invert_brightness, i915_panel_invert_brightness, int, 0600);
413 static u32 intel_panel_compute_brightness(struct drm_device *dev, u32 val)
415 struct drm_i915_private *dev_priv = dev->dev_private;
417 if (i915_panel_invert_brightness < 0)
420 if (i915_panel_invert_brightness > 0 ||
421 dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) {
422 u32 max = intel_panel_get_max_backlight(dev);
430 static u32 intel_panel_get_backlight(struct drm_device *dev)
432 struct drm_i915_private *dev_priv = dev->dev_private;
436 spin_lock_irqsave(&dev_priv->backlight.lock, flags);
438 if (HAS_PCH_SPLIT(dev)) {
439 val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
441 val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
442 if (INTEL_INFO(dev)->gen < 4)
445 if (is_backlight_combination_mode(dev)) {
448 pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc);
453 val = intel_panel_compute_brightness(dev, val);
455 spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
457 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
461 static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level)
463 struct drm_i915_private *dev_priv = dev->dev_private;
464 u32 val = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
465 I915_WRITE(BLC_PWM_CPU_CTL, val | level);
468 static void intel_panel_actually_set_backlight(struct drm_device *dev,
471 struct drm_i915_private *dev_priv = dev->dev_private;
474 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
475 level = intel_panel_compute_brightness(dev, level);
477 if (HAS_PCH_SPLIT(dev))
478 return intel_pch_panel_set_backlight(dev, level);
480 if (is_backlight_combination_mode(dev)) {
481 u32 max = intel_panel_get_max_backlight(dev);
484 /* we're screwed, but keep behaviour backwards compatible */
488 lbpc = level * 0xfe / max + 1;
490 pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
493 tmp = I915_READ(BLC_PWM_CTL);
494 if (INTEL_INFO(dev)->gen < 4)
496 tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK;
497 I915_WRITE(BLC_PWM_CTL, tmp | level);
500 /* set backlight brightness to level in range [0..max] */
501 void intel_panel_set_backlight(struct drm_device *dev, u32 level, u32 max)
503 struct drm_i915_private *dev_priv = dev->dev_private;
507 spin_lock_irqsave(&dev_priv->backlight.lock, flags);
509 freq = intel_panel_get_max_backlight(dev);
511 /* we are screwed, bail out */
515 /* scale to hardware, but be careful to not overflow */
517 level = level * freq / max;
519 level = freq / max * level;
521 dev_priv->backlight.level = level;
522 if (dev_priv->backlight.device)
523 dev_priv->backlight.device->props.brightness = level;
525 if (dev_priv->backlight.enabled)
526 intel_panel_actually_set_backlight(dev, level);
528 spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
531 void intel_panel_disable_backlight(struct drm_device *dev)
533 struct drm_i915_private *dev_priv = dev->dev_private;
537 * Do not disable backlight on the vgaswitcheroo path. When switching
538 * away from i915, the other client may depend on i915 to handle the
539 * backlight. This will leave the backlight on unnecessarily when
540 * another client is not activated.
542 if (dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) {
543 DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n");
547 spin_lock_irqsave(&dev_priv->backlight.lock, flags);
549 dev_priv->backlight.enabled = false;
550 intel_panel_actually_set_backlight(dev, 0);
552 if (INTEL_INFO(dev)->gen >= 4) {
555 reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2;
557 I915_WRITE(reg, I915_READ(reg) & ~BLM_PWM_ENABLE);
559 if (HAS_PCH_SPLIT(dev)) {
560 tmp = I915_READ(BLC_PWM_PCH_CTL1);
561 tmp &= ~BLM_PCH_PWM_ENABLE;
562 I915_WRITE(BLC_PWM_PCH_CTL1, tmp);
566 spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
569 void intel_panel_enable_backlight(struct drm_device *dev,
572 struct drm_i915_private *dev_priv = dev->dev_private;
573 enum transcoder cpu_transcoder =
574 intel_pipe_to_cpu_transcoder(dev_priv, pipe);
577 spin_lock_irqsave(&dev_priv->backlight.lock, flags);
579 if (dev_priv->backlight.level == 0) {
580 dev_priv->backlight.level = intel_panel_get_max_backlight(dev);
581 if (dev_priv->backlight.device)
582 dev_priv->backlight.device->props.brightness =
583 dev_priv->backlight.level;
586 if (INTEL_INFO(dev)->gen >= 4) {
589 reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2;
592 tmp = I915_READ(reg);
594 /* Note that this can also get called through dpms changes. And
595 * we don't track the backlight dpms state, hence check whether
596 * we have to do anything first. */
597 if (tmp & BLM_PWM_ENABLE)
600 if (INTEL_INFO(dev)->num_pipes == 3)
601 tmp &= ~BLM_PIPE_SELECT_IVB;
603 tmp &= ~BLM_PIPE_SELECT;
605 if (cpu_transcoder == TRANSCODER_EDP)
606 tmp |= BLM_TRANSCODER_EDP;
608 tmp |= BLM_PIPE(cpu_transcoder);
609 tmp &= ~BLM_PWM_ENABLE;
611 I915_WRITE(reg, tmp);
613 I915_WRITE(reg, tmp | BLM_PWM_ENABLE);
615 if (HAS_PCH_SPLIT(dev) &&
616 !(dev_priv->quirks & QUIRK_NO_PCH_PWM_ENABLE)) {
617 tmp = I915_READ(BLC_PWM_PCH_CTL1);
618 tmp |= BLM_PCH_PWM_ENABLE;
619 tmp &= ~BLM_PCH_OVERRIDE_ENABLE;
620 I915_WRITE(BLC_PWM_PCH_CTL1, tmp);
625 /* Call below after setting BLC_PWM_CPU_CTL2 and BLC_PWM_PCH_CTL1.
626 * BLC_PWM_CPU_CTL may be cleared to zero automatically when these
629 dev_priv->backlight.enabled = true;
630 intel_panel_actually_set_backlight(dev, dev_priv->backlight.level);
632 spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
635 /* FIXME: use VBT vals to init PWM_CTL and PWM_CTL2 correctly */
636 static void intel_panel_init_backlight_regs(struct drm_device *dev)
638 struct drm_i915_private *dev_priv = dev->dev_private;
640 if (IS_VALLEYVIEW(dev)) {
641 u32 cur_val = I915_READ(BLC_PWM_CTL) &
642 BACKLIGHT_DUTY_CYCLE_MASK;
643 I915_WRITE(BLC_PWM_CTL, (0xf42 << 16) | cur_val);
647 static void intel_panel_init_backlight(struct drm_device *dev)
649 struct drm_i915_private *dev_priv = dev->dev_private;
651 intel_panel_init_backlight_regs(dev);
653 dev_priv->backlight.level = intel_panel_get_backlight(dev);
654 dev_priv->backlight.enabled = dev_priv->backlight.level != 0;
657 enum drm_connector_status
658 intel_panel_detect(struct drm_device *dev)
660 struct drm_i915_private *dev_priv = dev->dev_private;
662 /* Assume that the BIOS does not lie through the OpRegion... */
663 if (!i915_panel_ignore_lid && dev_priv->opregion.lid_state) {
664 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
665 connector_status_connected :
666 connector_status_disconnected;
669 switch (i915_panel_ignore_lid) {
671 return connector_status_connected;
673 return connector_status_disconnected;
675 return connector_status_unknown;
679 #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
680 static int intel_panel_update_status(struct backlight_device *bd)
682 struct drm_device *dev = bl_get_data(bd);
683 intel_panel_set_backlight(dev, bd->props.brightness,
684 bd->props.max_brightness);
688 static int intel_panel_get_brightness(struct backlight_device *bd)
690 struct drm_device *dev = bl_get_data(bd);
691 return intel_panel_get_backlight(dev);
694 static const struct backlight_ops intel_panel_bl_ops = {
695 .update_status = intel_panel_update_status,
696 .get_brightness = intel_panel_get_brightness,
699 int intel_panel_setup_backlight(struct drm_connector *connector)
701 struct drm_device *dev = connector->dev;
702 struct drm_i915_private *dev_priv = dev->dev_private;
703 struct backlight_properties props;
706 intel_panel_init_backlight(dev);
708 if (WARN_ON(dev_priv->backlight.device))
711 memset(&props, 0, sizeof(props));
712 props.type = BACKLIGHT_RAW;
713 props.brightness = dev_priv->backlight.level;
715 spin_lock_irqsave(&dev_priv->backlight.lock, flags);
716 props.max_brightness = intel_panel_get_max_backlight(dev);
717 spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
719 if (props.max_brightness == 0) {
720 DRM_DEBUG_DRIVER("Failed to get maximum backlight value\n");
723 dev_priv->backlight.device =
724 backlight_device_register("intel_backlight",
725 connector->kdev, dev,
726 &intel_panel_bl_ops, &props);
728 if (IS_ERR(dev_priv->backlight.device)) {
729 DRM_ERROR("Failed to register backlight: %ld\n",
730 PTR_ERR(dev_priv->backlight.device));
731 dev_priv->backlight.device = NULL;
737 void intel_panel_destroy_backlight(struct drm_device *dev)
739 struct drm_i915_private *dev_priv = dev->dev_private;
740 if (dev_priv->backlight.device) {
741 backlight_device_unregister(dev_priv->backlight.device);
742 dev_priv->backlight.device = NULL;
746 int intel_panel_setup_backlight(struct drm_connector *connector)
748 intel_panel_init_backlight(connector->dev);
752 void intel_panel_destroy_backlight(struct drm_device *dev)
758 int intel_panel_init(struct intel_panel *panel,
759 struct drm_display_mode *fixed_mode)
761 panel->fixed_mode = fixed_mode;
766 void intel_panel_fini(struct intel_panel *panel)
768 struct intel_connector *intel_connector =
769 container_of(panel, struct intel_connector, panel);
771 if (panel->fixed_mode)
772 drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);