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, enum pipe pipe)
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);
361 } else if (IS_VALLEYVIEW(dev)) {
362 val = I915_READ(VLV_BLC_PWM_CTL(pipe));
363 if (dev_priv->regfile.saveBLC_PWM_CTL == 0) {
364 dev_priv->regfile.saveBLC_PWM_CTL = val;
365 dev_priv->regfile.saveBLC_PWM_CTL2 =
366 I915_READ(VLV_BLC_PWM_CTL2(pipe));
367 } else if (val == 0) {
368 val = dev_priv->regfile.saveBLC_PWM_CTL;
369 I915_WRITE(VLV_BLC_PWM_CTL(pipe), val);
370 I915_WRITE(VLV_BLC_PWM_CTL2(pipe),
371 dev_priv->regfile.saveBLC_PWM_CTL2);
377 val = I915_READ(BLC_PWM_CTL);
378 if (dev_priv->regfile.saveBLC_PWM_CTL == 0) {
379 dev_priv->regfile.saveBLC_PWM_CTL = val;
380 if (INTEL_INFO(dev)->gen >= 4)
381 dev_priv->regfile.saveBLC_PWM_CTL2 =
382 I915_READ(BLC_PWM_CTL2);
383 } else if (val == 0) {
384 val = dev_priv->regfile.saveBLC_PWM_CTL;
385 I915_WRITE(BLC_PWM_CTL, val);
386 if (INTEL_INFO(dev)->gen >= 4)
387 I915_WRITE(BLC_PWM_CTL2,
388 dev_priv->regfile.saveBLC_PWM_CTL2);
395 static u32 intel_panel_get_max_backlight(struct drm_device *dev,
400 max = i915_read_blc_pwm_ctl(dev, pipe);
402 if (HAS_PCH_SPLIT(dev)) {
405 if (INTEL_INFO(dev)->gen < 4)
410 if (is_backlight_combination_mode(dev))
414 DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max);
419 static int i915_panel_invert_brightness;
420 MODULE_PARM_DESC(invert_brightness, "Invert backlight brightness "
421 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
422 "report PCI device ID, subsystem vendor and subsystem device ID "
423 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
424 "It will then be included in an upcoming module version.");
425 module_param_named(invert_brightness, i915_panel_invert_brightness, int, 0600);
426 static u32 intel_panel_compute_brightness(struct drm_device *dev,
427 enum pipe pipe, u32 val)
429 struct drm_i915_private *dev_priv = dev->dev_private;
431 if (i915_panel_invert_brightness < 0)
434 if (i915_panel_invert_brightness > 0 ||
435 dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) {
436 u32 max = intel_panel_get_max_backlight(dev, pipe);
444 static u32 intel_panel_get_backlight(struct drm_device *dev,
447 struct drm_i915_private *dev_priv = dev->dev_private;
452 spin_lock_irqsave(&dev_priv->backlight.lock, flags);
454 if (HAS_PCH_SPLIT(dev)) {
455 val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
457 if (IS_VALLEYVIEW(dev))
458 reg = VLV_BLC_PWM_CTL(pipe);
462 val = I915_READ(reg) & BACKLIGHT_DUTY_CYCLE_MASK;
463 if (INTEL_INFO(dev)->gen < 4)
466 if (is_backlight_combination_mode(dev)) {
469 pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc);
474 val = intel_panel_compute_brightness(dev, pipe, val);
476 spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
478 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
482 static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level)
484 struct drm_i915_private *dev_priv = dev->dev_private;
485 u32 val = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
486 I915_WRITE(BLC_PWM_CPU_CTL, val | level);
489 static void intel_panel_actually_set_backlight(struct drm_device *dev,
490 enum pipe pipe, u32 level)
492 struct drm_i915_private *dev_priv = dev->dev_private;
496 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
497 level = intel_panel_compute_brightness(dev, pipe, level);
499 if (HAS_PCH_SPLIT(dev))
500 return intel_pch_panel_set_backlight(dev, level);
502 if (is_backlight_combination_mode(dev)) {
503 u32 max = intel_panel_get_max_backlight(dev, pipe);
506 /* we're screwed, but keep behaviour backwards compatible */
510 lbpc = level * 0xfe / max + 1;
512 pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
515 if (IS_VALLEYVIEW(dev))
516 reg = VLV_BLC_PWM_CTL(pipe);
520 tmp = I915_READ(reg);
521 if (INTEL_INFO(dev)->gen < 4)
523 tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK;
524 I915_WRITE(reg, tmp | level);
527 /* set backlight brightness to level in range [0..max] */
528 void intel_panel_set_backlight(struct intel_connector *connector, u32 level,
531 struct drm_device *dev = connector->base.dev;
532 struct drm_i915_private *dev_priv = dev->dev_private;
533 enum pipe pipe = intel_get_pipe_from_connector(connector);
537 if (pipe == INVALID_PIPE)
540 spin_lock_irqsave(&dev_priv->backlight.lock, flags);
542 freq = intel_panel_get_max_backlight(dev, pipe);
544 /* we are screwed, bail out */
548 /* scale to hardware, but be careful to not overflow */
550 level = level * freq / max;
552 level = freq / max * level;
554 dev_priv->backlight.level = level;
555 if (dev_priv->backlight.device)
556 dev_priv->backlight.device->props.brightness = level;
558 if (dev_priv->backlight.enabled)
559 intel_panel_actually_set_backlight(dev, pipe, level);
561 spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
564 void intel_panel_disable_backlight(struct intel_connector *connector)
566 struct drm_device *dev = connector->base.dev;
567 struct drm_i915_private *dev_priv = dev->dev_private;
568 enum pipe pipe = intel_get_pipe_from_connector(connector);
571 if (pipe == INVALID_PIPE)
575 * Do not disable backlight on the vgaswitcheroo path. When switching
576 * away from i915, the other client may depend on i915 to handle the
577 * backlight. This will leave the backlight on unnecessarily when
578 * another client is not activated.
580 if (dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) {
581 DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n");
585 spin_lock_irqsave(&dev_priv->backlight.lock, flags);
587 dev_priv->backlight.enabled = false;
588 intel_panel_actually_set_backlight(dev, pipe, 0);
590 if (INTEL_INFO(dev)->gen >= 4) {
593 if (HAS_PCH_SPLIT(dev))
594 reg = BLC_PWM_CPU_CTL2;
595 else if (IS_VALLEYVIEW(dev))
596 reg = VLV_BLC_PWM_CTL2(pipe);
600 I915_WRITE(reg, I915_READ(reg) & ~BLM_PWM_ENABLE);
602 if (HAS_PCH_SPLIT(dev)) {
603 tmp = I915_READ(BLC_PWM_PCH_CTL1);
604 tmp &= ~BLM_PCH_PWM_ENABLE;
605 I915_WRITE(BLC_PWM_PCH_CTL1, tmp);
609 spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
612 void intel_panel_enable_backlight(struct intel_connector *connector)
614 struct drm_device *dev = connector->base.dev;
615 struct drm_i915_private *dev_priv = dev->dev_private;
616 enum pipe pipe = intel_get_pipe_from_connector(connector);
617 enum transcoder cpu_transcoder =
618 intel_pipe_to_cpu_transcoder(dev_priv, pipe);
621 if (pipe == INVALID_PIPE)
624 DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));
626 spin_lock_irqsave(&dev_priv->backlight.lock, flags);
628 if (dev_priv->backlight.level == 0) {
629 dev_priv->backlight.level = intel_panel_get_max_backlight(dev,
631 if (dev_priv->backlight.device)
632 dev_priv->backlight.device->props.brightness =
633 dev_priv->backlight.level;
636 if (INTEL_INFO(dev)->gen >= 4) {
639 if (HAS_PCH_SPLIT(dev))
640 reg = BLC_PWM_CPU_CTL2;
641 else if (IS_VALLEYVIEW(dev))
642 reg = VLV_BLC_PWM_CTL2(pipe);
646 tmp = I915_READ(reg);
648 /* Note that this can also get called through dpms changes. And
649 * we don't track the backlight dpms state, hence check whether
650 * we have to do anything first. */
651 if (tmp & BLM_PWM_ENABLE)
654 if (INTEL_INFO(dev)->num_pipes == 3)
655 tmp &= ~BLM_PIPE_SELECT_IVB;
657 tmp &= ~BLM_PIPE_SELECT;
659 if (cpu_transcoder == TRANSCODER_EDP)
660 tmp |= BLM_TRANSCODER_EDP;
662 tmp |= BLM_PIPE(cpu_transcoder);
663 tmp &= ~BLM_PWM_ENABLE;
665 I915_WRITE(reg, tmp);
667 I915_WRITE(reg, tmp | BLM_PWM_ENABLE);
669 if (HAS_PCH_SPLIT(dev) &&
670 !(dev_priv->quirks & QUIRK_NO_PCH_PWM_ENABLE)) {
671 tmp = I915_READ(BLC_PWM_PCH_CTL1);
672 tmp |= BLM_PCH_PWM_ENABLE;
673 tmp &= ~BLM_PCH_OVERRIDE_ENABLE;
674 I915_WRITE(BLC_PWM_PCH_CTL1, tmp);
679 /* Call below after setting BLC_PWM_CPU_CTL2 and BLC_PWM_PCH_CTL1.
680 * BLC_PWM_CPU_CTL may be cleared to zero automatically when these
683 dev_priv->backlight.enabled = true;
684 intel_panel_actually_set_backlight(dev, pipe,
685 dev_priv->backlight.level);
687 spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
690 /* FIXME: use VBT vals to init PWM_CTL and PWM_CTL2 correctly */
691 static void intel_panel_init_backlight_regs(struct drm_device *dev)
693 struct drm_i915_private *dev_priv = dev->dev_private;
695 if (IS_VALLEYVIEW(dev)) {
698 for_each_pipe(pipe) {
699 u32 cur_val = I915_READ(VLV_BLC_PWM_CTL(pipe));
701 /* Skip if the modulation freq is already set */
702 if (cur_val & ~BACKLIGHT_DUTY_CYCLE_MASK)
705 cur_val &= BACKLIGHT_DUTY_CYCLE_MASK;
706 I915_WRITE(VLV_BLC_PWM_CTL(pipe), (0xf42 << 16) |
712 static void intel_panel_init_backlight(struct drm_device *dev)
714 struct drm_i915_private *dev_priv = dev->dev_private;
716 intel_panel_init_backlight_regs(dev);
718 dev_priv->backlight.level = intel_panel_get_backlight(dev, 0);
719 dev_priv->backlight.enabled = dev_priv->backlight.level != 0;
722 enum drm_connector_status
723 intel_panel_detect(struct drm_device *dev)
725 struct drm_i915_private *dev_priv = dev->dev_private;
727 /* Assume that the BIOS does not lie through the OpRegion... */
728 if (!i915_panel_ignore_lid && dev_priv->opregion.lid_state) {
729 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
730 connector_status_connected :
731 connector_status_disconnected;
734 switch (i915_panel_ignore_lid) {
736 return connector_status_connected;
738 return connector_status_disconnected;
740 return connector_status_unknown;
744 #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
745 static int intel_panel_update_status(struct backlight_device *bd)
747 struct intel_connector *connector = bl_get_data(bd);
748 struct drm_device *dev = connector->base.dev;
750 mutex_lock(&dev->mode_config.mutex);
751 DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n",
752 bd->props.brightness, bd->props.max_brightness);
753 intel_panel_set_backlight(connector, bd->props.brightness,
754 bd->props.max_brightness);
755 mutex_unlock(&dev->mode_config.mutex);
759 static int intel_panel_get_brightness(struct backlight_device *bd)
761 struct intel_connector *connector = bl_get_data(bd);
762 struct drm_device *dev = connector->base.dev;
765 mutex_lock(&dev->mode_config.mutex);
766 pipe = intel_get_pipe_from_connector(connector);
767 mutex_unlock(&dev->mode_config.mutex);
768 if (pipe == INVALID_PIPE)
771 return intel_panel_get_backlight(connector->base.dev, pipe);
774 static const struct backlight_ops intel_panel_bl_ops = {
775 .update_status = intel_panel_update_status,
776 .get_brightness = intel_panel_get_brightness,
779 int intel_panel_setup_backlight(struct drm_connector *connector)
781 struct drm_device *dev = connector->dev;
782 struct drm_i915_private *dev_priv = dev->dev_private;
783 struct backlight_properties props;
786 intel_panel_init_backlight(dev);
788 if (WARN_ON(dev_priv->backlight.device))
791 memset(&props, 0, sizeof(props));
792 props.type = BACKLIGHT_RAW;
793 props.brightness = dev_priv->backlight.level;
795 spin_lock_irqsave(&dev_priv->backlight.lock, flags);
796 props.max_brightness = intel_panel_get_max_backlight(dev, 0);
797 spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
799 if (props.max_brightness == 0) {
800 DRM_DEBUG_DRIVER("Failed to get maximum backlight value\n");
803 dev_priv->backlight.device =
804 backlight_device_register("intel_backlight",
806 to_intel_connector(connector),
807 &intel_panel_bl_ops, &props);
809 if (IS_ERR(dev_priv->backlight.device)) {
810 DRM_ERROR("Failed to register backlight: %ld\n",
811 PTR_ERR(dev_priv->backlight.device));
812 dev_priv->backlight.device = NULL;
818 void intel_panel_destroy_backlight(struct drm_device *dev)
820 struct drm_i915_private *dev_priv = dev->dev_private;
821 if (dev_priv->backlight.device) {
822 backlight_device_unregister(dev_priv->backlight.device);
823 dev_priv->backlight.device = NULL;
827 int intel_panel_setup_backlight(struct drm_connector *connector)
829 intel_panel_init_backlight(connector->dev);
833 void intel_panel_destroy_backlight(struct drm_device *dev)
839 int intel_panel_init(struct intel_panel *panel,
840 struct drm_display_mode *fixed_mode)
842 panel->fixed_mode = fixed_mode;
847 void intel_panel_fini(struct intel_panel *panel)
849 struct intel_connector *intel_connector =
850 container_of(panel, struct intel_connector, panel);
852 if (panel->fixed_mode)
853 drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);