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/kernel.h>
34 #include <linux/moduleparam.h>
35 #include "intel_drv.h"
38 intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
39 struct drm_display_mode *adjusted_mode)
41 drm_mode_copy(adjusted_mode, fixed_mode);
43 drm_mode_set_crtcinfo(adjusted_mode, 0);
47 * intel_find_panel_downclock - find the reduced downclock for LVDS in EDID
49 * @fixed_mode : panel native mode
50 * @connector: LVDS/eDP connector
52 * Return downclock_avail
53 * Find the reduced downclock for LVDS/eDP in EDID.
55 struct drm_display_mode *
56 intel_find_panel_downclock(struct drm_device *dev,
57 struct drm_display_mode *fixed_mode,
58 struct drm_connector *connector)
60 struct drm_display_mode *scan, *tmp_mode;
63 temp_downclock = fixed_mode->clock;
66 list_for_each_entry(scan, &connector->probed_modes, head) {
68 * If one mode has the same resolution with the fixed_panel
69 * mode while they have the different refresh rate, it means
70 * that the reduced downclock is found. In such
71 * case we can set the different FPx0/1 to dynamically select
72 * between low and high frequency.
74 if (scan->hdisplay == fixed_mode->hdisplay &&
75 scan->hsync_start == fixed_mode->hsync_start &&
76 scan->hsync_end == fixed_mode->hsync_end &&
77 scan->htotal == fixed_mode->htotal &&
78 scan->vdisplay == fixed_mode->vdisplay &&
79 scan->vsync_start == fixed_mode->vsync_start &&
80 scan->vsync_end == fixed_mode->vsync_end &&
81 scan->vtotal == fixed_mode->vtotal) {
82 if (scan->clock < temp_downclock) {
84 * The downclock is already found. But we
85 * expect to find the lower downclock.
87 temp_downclock = scan->clock;
93 if (temp_downclock < fixed_mode->clock)
94 return drm_mode_duplicate(dev, tmp_mode);
99 /* adjusted_mode has been preset to be the panel's fixed mode */
101 intel_pch_panel_fitting(struct intel_crtc *intel_crtc,
102 struct intel_crtc_state *pipe_config,
105 struct drm_display_mode *adjusted_mode;
106 int x, y, width, height;
108 adjusted_mode = &pipe_config->base.adjusted_mode;
110 x = y = width = height = 0;
112 /* Native modes don't need fitting */
113 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
114 adjusted_mode->vdisplay == pipe_config->pipe_src_h)
117 switch (fitting_mode) {
118 case DRM_MODE_SCALE_CENTER:
119 width = pipe_config->pipe_src_w;
120 height = pipe_config->pipe_src_h;
121 x = (adjusted_mode->hdisplay - width + 1)/2;
122 y = (adjusted_mode->vdisplay - height + 1)/2;
125 case DRM_MODE_SCALE_ASPECT:
126 /* Scale but preserve the aspect ratio */
128 u32 scaled_width = adjusted_mode->hdisplay
129 * pipe_config->pipe_src_h;
130 u32 scaled_height = pipe_config->pipe_src_w
131 * adjusted_mode->vdisplay;
132 if (scaled_width > scaled_height) { /* pillar */
133 width = scaled_height / pipe_config->pipe_src_h;
136 x = (adjusted_mode->hdisplay - width + 1) / 2;
138 height = adjusted_mode->vdisplay;
139 } else if (scaled_width < scaled_height) { /* letter */
140 height = scaled_width / pipe_config->pipe_src_w;
143 y = (adjusted_mode->vdisplay - height + 1) / 2;
145 width = adjusted_mode->hdisplay;
148 width = adjusted_mode->hdisplay;
149 height = adjusted_mode->vdisplay;
154 case DRM_MODE_SCALE_FULLSCREEN:
156 width = adjusted_mode->hdisplay;
157 height = adjusted_mode->vdisplay;
161 WARN(1, "bad panel fit mode: %d\n", fitting_mode);
166 pipe_config->pch_pfit.pos = (x << 16) | y;
167 pipe_config->pch_pfit.size = (width << 16) | height;
168 pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0;
172 centre_horizontally(struct drm_display_mode *mode,
175 u32 border, sync_pos, blank_width, sync_width;
177 /* keep the hsync and hblank widths constant */
178 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
179 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
180 sync_pos = (blank_width - sync_width + 1) / 2;
182 border = (mode->hdisplay - width + 1) / 2;
183 border += border & 1; /* make the border even */
185 mode->crtc_hdisplay = width;
186 mode->crtc_hblank_start = width + border;
187 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
189 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
190 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
194 centre_vertically(struct drm_display_mode *mode,
197 u32 border, sync_pos, blank_width, sync_width;
199 /* keep the vsync and vblank widths constant */
200 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
201 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
202 sync_pos = (blank_width - sync_width + 1) / 2;
204 border = (mode->vdisplay - height + 1) / 2;
206 mode->crtc_vdisplay = height;
207 mode->crtc_vblank_start = height + border;
208 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
210 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
211 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
214 static inline u32 panel_fitter_scaling(u32 source, u32 target)
217 * Floating point operation is not supported. So the FACTOR
218 * is defined, which can avoid the floating point computation
219 * when calculating the panel ratio.
222 #define FACTOR (1 << ACCURACY)
223 u32 ratio = source * FACTOR / target;
224 return (FACTOR * ratio + FACTOR/2) / FACTOR;
227 static void i965_scale_aspect(struct intel_crtc_state *pipe_config,
230 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
231 u32 scaled_width = adjusted_mode->hdisplay *
232 pipe_config->pipe_src_h;
233 u32 scaled_height = pipe_config->pipe_src_w *
234 adjusted_mode->vdisplay;
236 /* 965+ is easy, it does everything in hw */
237 if (scaled_width > scaled_height)
238 *pfit_control |= PFIT_ENABLE |
240 else if (scaled_width < scaled_height)
241 *pfit_control |= PFIT_ENABLE |
243 else if (adjusted_mode->hdisplay != pipe_config->pipe_src_w)
244 *pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
247 static void i9xx_scale_aspect(struct intel_crtc_state *pipe_config,
248 u32 *pfit_control, u32 *pfit_pgm_ratios,
251 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
252 u32 scaled_width = adjusted_mode->hdisplay *
253 pipe_config->pipe_src_h;
254 u32 scaled_height = pipe_config->pipe_src_w *
255 adjusted_mode->vdisplay;
259 * For earlier chips we have to calculate the scaling
260 * ratio by hand and program it into the
261 * PFIT_PGM_RATIO register
263 if (scaled_width > scaled_height) { /* pillar */
264 centre_horizontally(adjusted_mode,
266 pipe_config->pipe_src_h);
268 *border = LVDS_BORDER_ENABLE;
269 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay) {
270 bits = panel_fitter_scaling(pipe_config->pipe_src_h,
271 adjusted_mode->vdisplay);
273 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
274 bits << PFIT_VERT_SCALE_SHIFT);
275 *pfit_control |= (PFIT_ENABLE |
276 VERT_INTERP_BILINEAR |
277 HORIZ_INTERP_BILINEAR);
279 } else if (scaled_width < scaled_height) { /* letter */
280 centre_vertically(adjusted_mode,
282 pipe_config->pipe_src_w);
284 *border = LVDS_BORDER_ENABLE;
285 if (pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
286 bits = panel_fitter_scaling(pipe_config->pipe_src_w,
287 adjusted_mode->hdisplay);
289 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
290 bits << PFIT_VERT_SCALE_SHIFT);
291 *pfit_control |= (PFIT_ENABLE |
292 VERT_INTERP_BILINEAR |
293 HORIZ_INTERP_BILINEAR);
296 /* Aspects match, Let hw scale both directions */
297 *pfit_control |= (PFIT_ENABLE |
298 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
299 VERT_INTERP_BILINEAR |
300 HORIZ_INTERP_BILINEAR);
304 void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc,
305 struct intel_crtc_state *pipe_config,
308 struct drm_device *dev = intel_crtc->base.dev;
309 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
310 struct drm_display_mode *adjusted_mode;
312 adjusted_mode = &pipe_config->base.adjusted_mode;
314 /* Native modes don't need fitting */
315 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
316 adjusted_mode->vdisplay == pipe_config->pipe_src_h)
319 switch (fitting_mode) {
320 case DRM_MODE_SCALE_CENTER:
322 * For centered modes, we have to calculate border widths &
323 * heights and modify the values programmed into the CRTC.
325 centre_horizontally(adjusted_mode, pipe_config->pipe_src_w);
326 centre_vertically(adjusted_mode, pipe_config->pipe_src_h);
327 border = LVDS_BORDER_ENABLE;
329 case DRM_MODE_SCALE_ASPECT:
330 /* Scale but preserve the aspect ratio */
331 if (INTEL_INFO(dev)->gen >= 4)
332 i965_scale_aspect(pipe_config, &pfit_control);
334 i9xx_scale_aspect(pipe_config, &pfit_control,
335 &pfit_pgm_ratios, &border);
337 case DRM_MODE_SCALE_FULLSCREEN:
339 * Full scaling, even if it changes the aspect ratio.
340 * Fortunately this is all done for us in hw.
342 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay ||
343 pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
344 pfit_control |= PFIT_ENABLE;
345 if (INTEL_INFO(dev)->gen >= 4)
346 pfit_control |= PFIT_SCALING_AUTO;
348 pfit_control |= (VERT_AUTO_SCALE |
349 VERT_INTERP_BILINEAR |
351 HORIZ_INTERP_BILINEAR);
355 WARN(1, "bad panel fit mode: %d\n", fitting_mode);
359 /* 965+ wants fuzzy fitting */
360 /* FIXME: handle multiple panels by failing gracefully */
361 if (INTEL_INFO(dev)->gen >= 4)
362 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
366 if ((pfit_control & PFIT_ENABLE) == 0) {
371 /* Make sure pre-965 set dither correctly for 18bpp panels. */
372 if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18)
373 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
375 pipe_config->gmch_pfit.control = pfit_control;
376 pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios;
377 pipe_config->gmch_pfit.lvds_border_bits = border;
380 enum drm_connector_status
381 intel_panel_detect(struct drm_device *dev)
383 struct drm_i915_private *dev_priv = dev->dev_private;
385 /* Assume that the BIOS does not lie through the OpRegion... */
386 if (!i915.panel_ignore_lid && dev_priv->opregion.lid_state) {
387 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
388 connector_status_connected :
389 connector_status_disconnected;
392 switch (i915.panel_ignore_lid) {
394 return connector_status_connected;
396 return connector_status_disconnected;
398 return connector_status_unknown;
403 * scale - scale values from one range to another
405 * @source_val: value in range [@source_min..@source_max]
407 * Return @source_val in range [@source_min..@source_max] scaled to range
408 * [@target_min..@target_max].
410 static uint32_t scale(uint32_t source_val,
411 uint32_t source_min, uint32_t source_max,
412 uint32_t target_min, uint32_t target_max)
416 WARN_ON(source_min > source_max);
417 WARN_ON(target_min > target_max);
420 source_val = clamp(source_val, source_min, source_max);
422 /* avoid overflows */
423 target_val = DIV_ROUND_CLOSEST_ULL((uint64_t)(source_val - source_min) *
424 (target_max - target_min), source_max - source_min);
425 target_val += target_min;
430 /* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */
431 static inline u32 scale_user_to_hw(struct intel_connector *connector,
432 u32 user_level, u32 user_max)
434 struct intel_panel *panel = &connector->panel;
436 return scale(user_level, 0, user_max,
437 panel->backlight.min, panel->backlight.max);
440 /* Scale user_level in range [0..user_max] to [0..hw_max], clamping the result
441 * to [hw_min..hw_max]. */
442 static inline u32 clamp_user_to_hw(struct intel_connector *connector,
443 u32 user_level, u32 user_max)
445 struct intel_panel *panel = &connector->panel;
448 hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max);
449 hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max);
454 /* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */
455 static inline u32 scale_hw_to_user(struct intel_connector *connector,
456 u32 hw_level, u32 user_max)
458 struct intel_panel *panel = &connector->panel;
460 return scale(hw_level, panel->backlight.min, panel->backlight.max,
464 static u32 intel_panel_compute_brightness(struct intel_connector *connector,
467 struct drm_device *dev = connector->base.dev;
468 struct drm_i915_private *dev_priv = dev->dev_private;
469 struct intel_panel *panel = &connector->panel;
471 WARN_ON(panel->backlight.max == 0);
473 if (i915.invert_brightness < 0)
476 if (i915.invert_brightness > 0 ||
477 dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) {
478 return panel->backlight.max - val;
484 static u32 bdw_get_backlight(struct intel_connector *connector)
486 struct drm_device *dev = connector->base.dev;
487 struct drm_i915_private *dev_priv = dev->dev_private;
489 return I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK;
492 static u32 pch_get_backlight(struct intel_connector *connector)
494 struct drm_device *dev = connector->base.dev;
495 struct drm_i915_private *dev_priv = dev->dev_private;
497 return I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
500 static u32 i9xx_get_backlight(struct intel_connector *connector)
502 struct drm_device *dev = connector->base.dev;
503 struct drm_i915_private *dev_priv = dev->dev_private;
504 struct intel_panel *panel = &connector->panel;
507 val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
508 if (INTEL_INFO(dev)->gen < 4)
511 if (panel->backlight.combination_mode) {
514 pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc);
521 static u32 _vlv_get_backlight(struct drm_device *dev, enum pipe pipe)
523 struct drm_i915_private *dev_priv = dev->dev_private;
525 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
528 return I915_READ(VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK;
531 static u32 vlv_get_backlight(struct intel_connector *connector)
533 struct drm_device *dev = connector->base.dev;
534 enum pipe pipe = intel_get_pipe_from_connector(connector);
536 return _vlv_get_backlight(dev, pipe);
539 static u32 intel_panel_get_backlight(struct intel_connector *connector)
541 struct drm_device *dev = connector->base.dev;
542 struct drm_i915_private *dev_priv = dev->dev_private;
543 struct intel_panel *panel = &connector->panel;
546 mutex_lock(&dev_priv->backlight_lock);
548 if (panel->backlight.enabled) {
549 val = dev_priv->display.get_backlight(connector);
550 val = intel_panel_compute_brightness(connector, val);
553 mutex_unlock(&dev_priv->backlight_lock);
555 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
559 static void bdw_set_backlight(struct intel_connector *connector, u32 level)
561 struct drm_device *dev = connector->base.dev;
562 struct drm_i915_private *dev_priv = dev->dev_private;
563 u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK;
564 I915_WRITE(BLC_PWM_PCH_CTL2, val | level);
567 static void pch_set_backlight(struct intel_connector *connector, u32 level)
569 struct drm_device *dev = connector->base.dev;
570 struct drm_i915_private *dev_priv = dev->dev_private;
573 tmp = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
574 I915_WRITE(BLC_PWM_CPU_CTL, tmp | level);
577 static void i9xx_set_backlight(struct intel_connector *connector, u32 level)
579 struct drm_device *dev = connector->base.dev;
580 struct drm_i915_private *dev_priv = dev->dev_private;
581 struct intel_panel *panel = &connector->panel;
584 WARN_ON(panel->backlight.max == 0);
586 if (panel->backlight.combination_mode) {
589 lbpc = level * 0xfe / panel->backlight.max + 1;
591 pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
595 mask = BACKLIGHT_DUTY_CYCLE_MASK;
598 mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV;
601 tmp = I915_READ(BLC_PWM_CTL) & ~mask;
602 I915_WRITE(BLC_PWM_CTL, tmp | level);
605 static void vlv_set_backlight(struct intel_connector *connector, u32 level)
607 struct drm_device *dev = connector->base.dev;
608 struct drm_i915_private *dev_priv = dev->dev_private;
609 enum pipe pipe = intel_get_pipe_from_connector(connector);
612 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
615 tmp = I915_READ(VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK;
616 I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level);
620 intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level)
622 struct drm_device *dev = connector->base.dev;
623 struct drm_i915_private *dev_priv = dev->dev_private;
625 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
627 level = intel_panel_compute_brightness(connector, level);
628 dev_priv->display.set_backlight(connector, level);
631 /* set backlight brightness to level in range [0..max], scaling wrt hw min */
632 static void intel_panel_set_backlight(struct intel_connector *connector,
633 u32 user_level, u32 user_max)
635 struct drm_device *dev = connector->base.dev;
636 struct drm_i915_private *dev_priv = dev->dev_private;
637 struct intel_panel *panel = &connector->panel;
640 if (!panel->backlight.present)
643 mutex_lock(&dev_priv->backlight_lock);
645 WARN_ON(panel->backlight.max == 0);
647 hw_level = scale_user_to_hw(connector, user_level, user_max);
648 panel->backlight.level = hw_level;
650 if (panel->backlight.enabled)
651 intel_panel_actually_set_backlight(connector, hw_level);
653 mutex_unlock(&dev_priv->backlight_lock);
656 /* set backlight brightness to level in range [0..max], assuming hw min is
659 void intel_panel_set_backlight_acpi(struct intel_connector *connector,
660 u32 user_level, u32 user_max)
662 struct drm_device *dev = connector->base.dev;
663 struct drm_i915_private *dev_priv = dev->dev_private;
664 struct intel_panel *panel = &connector->panel;
665 enum pipe pipe = intel_get_pipe_from_connector(connector);
669 * INVALID_PIPE may occur during driver init because
670 * connection_mutex isn't held across the entire backlight
671 * setup + modeset readout, and the BIOS can issue the
672 * requests at any time.
674 if (!panel->backlight.present || pipe == INVALID_PIPE)
677 mutex_lock(&dev_priv->backlight_lock);
679 WARN_ON(panel->backlight.max == 0);
681 hw_level = clamp_user_to_hw(connector, user_level, user_max);
682 panel->backlight.level = hw_level;
684 if (panel->backlight.device)
685 panel->backlight.device->props.brightness =
686 scale_hw_to_user(connector,
687 panel->backlight.level,
688 panel->backlight.device->props.max_brightness);
690 if (panel->backlight.enabled)
691 intel_panel_actually_set_backlight(connector, hw_level);
693 mutex_unlock(&dev_priv->backlight_lock);
696 static void pch_disable_backlight(struct intel_connector *connector)
698 struct drm_device *dev = connector->base.dev;
699 struct drm_i915_private *dev_priv = dev->dev_private;
702 intel_panel_actually_set_backlight(connector, 0);
704 tmp = I915_READ(BLC_PWM_CPU_CTL2);
705 I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE);
707 tmp = I915_READ(BLC_PWM_PCH_CTL1);
708 I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE);
711 static void i9xx_disable_backlight(struct intel_connector *connector)
713 intel_panel_actually_set_backlight(connector, 0);
716 static void i965_disable_backlight(struct intel_connector *connector)
718 struct drm_device *dev = connector->base.dev;
719 struct drm_i915_private *dev_priv = dev->dev_private;
722 intel_panel_actually_set_backlight(connector, 0);
724 tmp = I915_READ(BLC_PWM_CTL2);
725 I915_WRITE(BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE);
728 static void vlv_disable_backlight(struct intel_connector *connector)
730 struct drm_device *dev = connector->base.dev;
731 struct drm_i915_private *dev_priv = dev->dev_private;
732 enum pipe pipe = intel_get_pipe_from_connector(connector);
735 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
738 intel_panel_actually_set_backlight(connector, 0);
740 tmp = I915_READ(VLV_BLC_PWM_CTL2(pipe));
741 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE);
744 void intel_panel_disable_backlight(struct intel_connector *connector)
746 struct drm_device *dev = connector->base.dev;
747 struct drm_i915_private *dev_priv = dev->dev_private;
748 struct intel_panel *panel = &connector->panel;
750 if (!panel->backlight.present)
754 * Do not disable backlight on the vgaswitcheroo path. When switching
755 * away from i915, the other client may depend on i915 to handle the
756 * backlight. This will leave the backlight on unnecessarily when
757 * another client is not activated.
759 if (dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) {
760 DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n");
764 mutex_lock(&dev_priv->backlight_lock);
766 if (panel->backlight.device)
767 panel->backlight.device->props.power = FB_BLANK_POWERDOWN;
768 panel->backlight.enabled = false;
769 dev_priv->display.disable_backlight(connector);
771 mutex_unlock(&dev_priv->backlight_lock);
774 static void bdw_enable_backlight(struct intel_connector *connector)
776 struct drm_device *dev = connector->base.dev;
777 struct drm_i915_private *dev_priv = dev->dev_private;
778 struct intel_panel *panel = &connector->panel;
779 u32 pch_ctl1, pch_ctl2;
781 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
782 if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
783 DRM_DEBUG_KMS("pch backlight already enabled\n");
784 pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
785 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
788 pch_ctl2 = panel->backlight.max << 16;
789 I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
792 if (panel->backlight.active_low_pwm)
793 pch_ctl1 |= BLM_PCH_POLARITY;
795 /* After LPT, override is the default. */
796 if (HAS_PCH_LPT(dev_priv))
797 pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE;
799 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
800 POSTING_READ(BLC_PWM_PCH_CTL1);
801 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
803 /* This won't stick until the above enable. */
804 intel_panel_actually_set_backlight(connector, panel->backlight.level);
807 static void pch_enable_backlight(struct intel_connector *connector)
809 struct drm_device *dev = connector->base.dev;
810 struct drm_i915_private *dev_priv = dev->dev_private;
811 struct intel_panel *panel = &connector->panel;
812 enum pipe pipe = intel_get_pipe_from_connector(connector);
813 enum transcoder cpu_transcoder =
814 intel_pipe_to_cpu_transcoder(dev_priv, pipe);
815 u32 cpu_ctl2, pch_ctl1, pch_ctl2;
817 cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
818 if (cpu_ctl2 & BLM_PWM_ENABLE) {
819 DRM_DEBUG_KMS("cpu backlight already enabled\n");
820 cpu_ctl2 &= ~BLM_PWM_ENABLE;
821 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
824 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
825 if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
826 DRM_DEBUG_KMS("pch backlight already enabled\n");
827 pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
828 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
831 if (cpu_transcoder == TRANSCODER_EDP)
832 cpu_ctl2 = BLM_TRANSCODER_EDP;
834 cpu_ctl2 = BLM_PIPE(cpu_transcoder);
835 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
836 POSTING_READ(BLC_PWM_CPU_CTL2);
837 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE);
839 /* This won't stick until the above enable. */
840 intel_panel_actually_set_backlight(connector, panel->backlight.level);
842 pch_ctl2 = panel->backlight.max << 16;
843 I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
846 if (panel->backlight.active_low_pwm)
847 pch_ctl1 |= BLM_PCH_POLARITY;
849 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
850 POSTING_READ(BLC_PWM_PCH_CTL1);
851 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
854 static void i9xx_enable_backlight(struct intel_connector *connector)
856 struct drm_device *dev = connector->base.dev;
857 struct drm_i915_private *dev_priv = dev->dev_private;
858 struct intel_panel *panel = &connector->panel;
861 ctl = I915_READ(BLC_PWM_CTL);
862 if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) {
863 DRM_DEBUG_KMS("backlight already enabled\n");
864 I915_WRITE(BLC_PWM_CTL, 0);
867 freq = panel->backlight.max;
868 if (panel->backlight.combination_mode)
872 if (panel->backlight.combination_mode)
873 ctl |= BLM_LEGACY_MODE;
874 if (IS_PINEVIEW(dev) && panel->backlight.active_low_pwm)
875 ctl |= BLM_POLARITY_PNV;
877 I915_WRITE(BLC_PWM_CTL, ctl);
878 POSTING_READ(BLC_PWM_CTL);
880 /* XXX: combine this into above write? */
881 intel_panel_actually_set_backlight(connector, panel->backlight.level);
884 * Needed to enable backlight on some 855gm models. BLC_HIST_CTL is
885 * 855gm only, but checking for gen2 is safe, as 855gm is the only gen2
886 * that has backlight.
889 I915_WRITE(BLC_HIST_CTL, BLM_HISTOGRAM_ENABLE);
892 static void i965_enable_backlight(struct intel_connector *connector)
894 struct drm_device *dev = connector->base.dev;
895 struct drm_i915_private *dev_priv = dev->dev_private;
896 struct intel_panel *panel = &connector->panel;
897 enum pipe pipe = intel_get_pipe_from_connector(connector);
900 ctl2 = I915_READ(BLC_PWM_CTL2);
901 if (ctl2 & BLM_PWM_ENABLE) {
902 DRM_DEBUG_KMS("backlight already enabled\n");
903 ctl2 &= ~BLM_PWM_ENABLE;
904 I915_WRITE(BLC_PWM_CTL2, ctl2);
907 freq = panel->backlight.max;
908 if (panel->backlight.combination_mode)
912 I915_WRITE(BLC_PWM_CTL, ctl);
914 ctl2 = BLM_PIPE(pipe);
915 if (panel->backlight.combination_mode)
916 ctl2 |= BLM_COMBINATION_MODE;
917 if (panel->backlight.active_low_pwm)
918 ctl2 |= BLM_POLARITY_I965;
919 I915_WRITE(BLC_PWM_CTL2, ctl2);
920 POSTING_READ(BLC_PWM_CTL2);
921 I915_WRITE(BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE);
923 intel_panel_actually_set_backlight(connector, panel->backlight.level);
926 static void vlv_enable_backlight(struct intel_connector *connector)
928 struct drm_device *dev = connector->base.dev;
929 struct drm_i915_private *dev_priv = dev->dev_private;
930 struct intel_panel *panel = &connector->panel;
931 enum pipe pipe = intel_get_pipe_from_connector(connector);
934 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
937 ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe));
938 if (ctl2 & BLM_PWM_ENABLE) {
939 DRM_DEBUG_KMS("backlight already enabled\n");
940 ctl2 &= ~BLM_PWM_ENABLE;
941 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
944 ctl = panel->backlight.max << 16;
945 I915_WRITE(VLV_BLC_PWM_CTL(pipe), ctl);
947 /* XXX: combine this into above write? */
948 intel_panel_actually_set_backlight(connector, panel->backlight.level);
951 if (panel->backlight.active_low_pwm)
952 ctl2 |= BLM_POLARITY_I965;
953 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
954 POSTING_READ(VLV_BLC_PWM_CTL2(pipe));
955 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE);
958 void intel_panel_enable_backlight(struct intel_connector *connector)
960 struct drm_device *dev = connector->base.dev;
961 struct drm_i915_private *dev_priv = dev->dev_private;
962 struct intel_panel *panel = &connector->panel;
963 enum pipe pipe = intel_get_pipe_from_connector(connector);
965 if (!panel->backlight.present)
968 DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));
970 mutex_lock(&dev_priv->backlight_lock);
972 WARN_ON(panel->backlight.max == 0);
974 if (panel->backlight.level <= panel->backlight.min) {
975 panel->backlight.level = panel->backlight.max;
976 if (panel->backlight.device)
977 panel->backlight.device->props.brightness =
978 scale_hw_to_user(connector,
979 panel->backlight.level,
980 panel->backlight.device->props.max_brightness);
983 dev_priv->display.enable_backlight(connector);
984 panel->backlight.enabled = true;
985 if (panel->backlight.device)
986 panel->backlight.device->props.power = FB_BLANK_UNBLANK;
988 mutex_unlock(&dev_priv->backlight_lock);
991 #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
992 static int intel_backlight_device_update_status(struct backlight_device *bd)
994 struct intel_connector *connector = bl_get_data(bd);
995 struct intel_panel *panel = &connector->panel;
996 struct drm_device *dev = connector->base.dev;
998 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
999 DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n",
1000 bd->props.brightness, bd->props.max_brightness);
1001 intel_panel_set_backlight(connector, bd->props.brightness,
1002 bd->props.max_brightness);
1005 * Allow flipping bl_power as a sub-state of enabled. Sadly the
1006 * backlight class device does not make it easy to to differentiate
1007 * between callbacks for brightness and bl_power, so our backlight_power
1008 * callback needs to take this into account.
1010 if (panel->backlight.enabled) {
1011 if (panel->backlight_power) {
1012 bool enable = bd->props.power == FB_BLANK_UNBLANK &&
1013 bd->props.brightness != 0;
1014 panel->backlight_power(connector, enable);
1017 bd->props.power = FB_BLANK_POWERDOWN;
1020 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1024 static int intel_backlight_device_get_brightness(struct backlight_device *bd)
1026 struct intel_connector *connector = bl_get_data(bd);
1027 struct drm_device *dev = connector->base.dev;
1028 struct drm_i915_private *dev_priv = dev->dev_private;
1032 intel_runtime_pm_get(dev_priv);
1033 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1035 hw_level = intel_panel_get_backlight(connector);
1036 ret = scale_hw_to_user(connector, hw_level, bd->props.max_brightness);
1038 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1039 intel_runtime_pm_put(dev_priv);
1044 static const struct backlight_ops intel_backlight_device_ops = {
1045 .update_status = intel_backlight_device_update_status,
1046 .get_brightness = intel_backlight_device_get_brightness,
1049 static int intel_backlight_device_register(struct intel_connector *connector)
1051 struct intel_panel *panel = &connector->panel;
1052 struct backlight_properties props;
1054 if (WARN_ON(panel->backlight.device))
1057 if (!panel->backlight.present)
1060 WARN_ON(panel->backlight.max == 0);
1062 memset(&props, 0, sizeof(props));
1063 props.type = BACKLIGHT_RAW;
1066 * Note: Everything should work even if the backlight device max
1067 * presented to the userspace is arbitrarily chosen.
1069 props.max_brightness = panel->backlight.max;
1070 props.brightness = scale_hw_to_user(connector,
1071 panel->backlight.level,
1072 props.max_brightness);
1074 if (panel->backlight.enabled)
1075 props.power = FB_BLANK_UNBLANK;
1077 props.power = FB_BLANK_POWERDOWN;
1080 * Note: using the same name independent of the connector prevents
1081 * registration of multiple backlight devices in the driver.
1083 panel->backlight.device =
1084 backlight_device_register("intel_backlight",
1085 connector->base.kdev,
1087 &intel_backlight_device_ops, &props);
1089 if (IS_ERR(panel->backlight.device)) {
1090 DRM_ERROR("Failed to register backlight: %ld\n",
1091 PTR_ERR(panel->backlight.device));
1092 panel->backlight.device = NULL;
1096 DRM_DEBUG_KMS("Connector %s backlight sysfs interface registered\n",
1097 connector->base.name);
1102 static void intel_backlight_device_unregister(struct intel_connector *connector)
1104 struct intel_panel *panel = &connector->panel;
1106 if (panel->backlight.device) {
1107 backlight_device_unregister(panel->backlight.device);
1108 panel->backlight.device = NULL;
1111 #else /* CONFIG_BACKLIGHT_CLASS_DEVICE */
1112 static int intel_backlight_device_register(struct intel_connector *connector)
1116 static void intel_backlight_device_unregister(struct intel_connector *connector)
1119 #endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */
1122 * Note: The setup hooks can't assume pipe is set!
1124 * XXX: Query mode clock or hardware clock and program PWM modulation frequency
1125 * appropriately when it's 0. Use VBT and/or sane defaults.
1127 static u32 get_backlight_min_vbt(struct intel_connector *connector)
1129 struct drm_device *dev = connector->base.dev;
1130 struct drm_i915_private *dev_priv = dev->dev_private;
1131 struct intel_panel *panel = &connector->panel;
1134 WARN_ON(panel->backlight.max == 0);
1137 * XXX: If the vbt value is 255, it makes min equal to max, which leads
1138 * to problems. There are such machines out there. Either our
1139 * interpretation is wrong or the vbt has bogus data. Or both. Safeguard
1140 * against this by letting the minimum be at most (arbitrarily chosen)
1143 min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64);
1144 if (min != dev_priv->vbt.backlight.min_brightness) {
1145 DRM_DEBUG_KMS("clamping VBT min backlight %d/255 to %d/255\n",
1146 dev_priv->vbt.backlight.min_brightness, min);
1149 /* vbt value is a coefficient in range [0..255] */
1150 return scale(min, 0, 255, 0, panel->backlight.max);
1153 static int bdw_setup_backlight(struct intel_connector *connector, enum pipe unused)
1155 struct drm_device *dev = connector->base.dev;
1156 struct drm_i915_private *dev_priv = dev->dev_private;
1157 struct intel_panel *panel = &connector->panel;
1158 u32 pch_ctl1, pch_ctl2, val;
1160 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
1161 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;
1163 pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
1164 panel->backlight.max = pch_ctl2 >> 16;
1165 if (!panel->backlight.max)
1168 panel->backlight.min = get_backlight_min_vbt(connector);
1170 val = bdw_get_backlight(connector);
1171 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1173 panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) &&
1174 panel->backlight.level != 0;
1179 static int pch_setup_backlight(struct intel_connector *connector, enum pipe unused)
1181 struct drm_device *dev = connector->base.dev;
1182 struct drm_i915_private *dev_priv = dev->dev_private;
1183 struct intel_panel *panel = &connector->panel;
1184 u32 cpu_ctl2, pch_ctl1, pch_ctl2, val;
1186 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
1187 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;
1189 pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
1190 panel->backlight.max = pch_ctl2 >> 16;
1191 if (!panel->backlight.max)
1194 panel->backlight.min = get_backlight_min_vbt(connector);
1196 val = pch_get_backlight(connector);
1197 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1199 cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
1200 panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) &&
1201 (pch_ctl1 & BLM_PCH_PWM_ENABLE) && panel->backlight.level != 0;
1206 static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unused)
1208 struct drm_device *dev = connector->base.dev;
1209 struct drm_i915_private *dev_priv = dev->dev_private;
1210 struct intel_panel *panel = &connector->panel;
1213 ctl = I915_READ(BLC_PWM_CTL);
1215 if (IS_GEN2(dev) || IS_I915GM(dev) || IS_I945GM(dev))
1216 panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE;
1218 if (IS_PINEVIEW(dev))
1219 panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV;
1221 panel->backlight.max = ctl >> 17;
1222 if (panel->backlight.combination_mode)
1223 panel->backlight.max *= 0xff;
1225 if (!panel->backlight.max)
1228 panel->backlight.min = get_backlight_min_vbt(connector);
1230 val = i9xx_get_backlight(connector);
1231 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1233 panel->backlight.enabled = panel->backlight.level != 0;
1238 static int i965_setup_backlight(struct intel_connector *connector, enum pipe unused)
1240 struct drm_device *dev = connector->base.dev;
1241 struct drm_i915_private *dev_priv = dev->dev_private;
1242 struct intel_panel *panel = &connector->panel;
1245 ctl2 = I915_READ(BLC_PWM_CTL2);
1246 panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE;
1247 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;
1249 ctl = I915_READ(BLC_PWM_CTL);
1250 panel->backlight.max = ctl >> 16;
1251 if (panel->backlight.combination_mode)
1252 panel->backlight.max *= 0xff;
1254 if (!panel->backlight.max)
1257 panel->backlight.min = get_backlight_min_vbt(connector);
1259 val = i9xx_get_backlight(connector);
1260 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1262 panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&
1263 panel->backlight.level != 0;
1268 static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe)
1270 struct drm_device *dev = connector->base.dev;
1271 struct drm_i915_private *dev_priv = dev->dev_private;
1272 struct intel_panel *panel = &connector->panel;
1276 for_each_pipe(dev_priv, p) {
1277 u32 cur_val = I915_READ(VLV_BLC_PWM_CTL(p));
1279 /* Skip if the modulation freq is already set */
1280 if (cur_val & ~BACKLIGHT_DUTY_CYCLE_MASK)
1283 cur_val &= BACKLIGHT_DUTY_CYCLE_MASK;
1284 I915_WRITE(VLV_BLC_PWM_CTL(p), (0xf42 << 16) |
1288 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
1291 ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe));
1292 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;
1294 ctl = I915_READ(VLV_BLC_PWM_CTL(pipe));
1295 panel->backlight.max = ctl >> 16;
1296 if (!panel->backlight.max)
1299 panel->backlight.min = get_backlight_min_vbt(connector);
1301 val = _vlv_get_backlight(dev, pipe);
1302 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1304 panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&
1305 panel->backlight.level != 0;
1310 int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe)
1312 struct drm_device *dev = connector->dev;
1313 struct drm_i915_private *dev_priv = dev->dev_private;
1314 struct intel_connector *intel_connector = to_intel_connector(connector);
1315 struct intel_panel *panel = &intel_connector->panel;
1318 if (!dev_priv->vbt.backlight.present) {
1319 if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) {
1320 DRM_DEBUG_KMS("no backlight present per VBT, but present per quirk\n");
1322 DRM_DEBUG_KMS("no backlight present per VBT\n");
1327 /* set level and max in panel struct */
1328 mutex_lock(&dev_priv->backlight_lock);
1329 ret = dev_priv->display.setup_backlight(intel_connector, pipe);
1330 mutex_unlock(&dev_priv->backlight_lock);
1333 DRM_DEBUG_KMS("failed to setup backlight for connector %s\n",
1338 panel->backlight.present = true;
1340 DRM_DEBUG_KMS("Connector %s backlight initialized, %s, brightness %u/%u\n",
1342 panel->backlight.enabled ? "enabled" : "disabled",
1343 panel->backlight.level, panel->backlight.max);
1348 void intel_panel_destroy_backlight(struct drm_connector *connector)
1350 struct intel_connector *intel_connector = to_intel_connector(connector);
1351 struct intel_panel *panel = &intel_connector->panel;
1353 panel->backlight.present = false;
1356 /* Set up chip specific backlight functions */
1357 void intel_panel_init_backlight_funcs(struct drm_device *dev)
1359 struct drm_i915_private *dev_priv = dev->dev_private;
1361 if (IS_BROADWELL(dev) || (INTEL_INFO(dev)->gen >= 9)) {
1362 dev_priv->display.setup_backlight = bdw_setup_backlight;
1363 dev_priv->display.enable_backlight = bdw_enable_backlight;
1364 dev_priv->display.disable_backlight = pch_disable_backlight;
1365 dev_priv->display.set_backlight = bdw_set_backlight;
1366 dev_priv->display.get_backlight = bdw_get_backlight;
1367 } else if (HAS_PCH_SPLIT(dev)) {
1368 dev_priv->display.setup_backlight = pch_setup_backlight;
1369 dev_priv->display.enable_backlight = pch_enable_backlight;
1370 dev_priv->display.disable_backlight = pch_disable_backlight;
1371 dev_priv->display.set_backlight = pch_set_backlight;
1372 dev_priv->display.get_backlight = pch_get_backlight;
1373 } else if (IS_VALLEYVIEW(dev)) {
1374 dev_priv->display.setup_backlight = vlv_setup_backlight;
1375 dev_priv->display.enable_backlight = vlv_enable_backlight;
1376 dev_priv->display.disable_backlight = vlv_disable_backlight;
1377 dev_priv->display.set_backlight = vlv_set_backlight;
1378 dev_priv->display.get_backlight = vlv_get_backlight;
1379 } else if (IS_GEN4(dev)) {
1380 dev_priv->display.setup_backlight = i965_setup_backlight;
1381 dev_priv->display.enable_backlight = i965_enable_backlight;
1382 dev_priv->display.disable_backlight = i965_disable_backlight;
1383 dev_priv->display.set_backlight = i9xx_set_backlight;
1384 dev_priv->display.get_backlight = i9xx_get_backlight;
1386 dev_priv->display.setup_backlight = i9xx_setup_backlight;
1387 dev_priv->display.enable_backlight = i9xx_enable_backlight;
1388 dev_priv->display.disable_backlight = i9xx_disable_backlight;
1389 dev_priv->display.set_backlight = i9xx_set_backlight;
1390 dev_priv->display.get_backlight = i9xx_get_backlight;
1394 int intel_panel_init(struct intel_panel *panel,
1395 struct drm_display_mode *fixed_mode,
1396 struct drm_display_mode *downclock_mode)
1398 panel->fixed_mode = fixed_mode;
1399 panel->downclock_mode = downclock_mode;
1404 void intel_panel_fini(struct intel_panel *panel)
1406 struct intel_connector *intel_connector =
1407 container_of(panel, struct intel_connector, panel);
1409 if (panel->fixed_mode)
1410 drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);
1412 if (panel->downclock_mode)
1413 drm_mode_destroy(intel_connector->base.dev,
1414 panel->downclock_mode);
1417 void intel_backlight_register(struct drm_device *dev)
1419 struct intel_connector *connector;
1421 list_for_each_entry(connector, &dev->mode_config.connector_list, base.head)
1422 intel_backlight_device_register(connector);
1425 void intel_backlight_unregister(struct drm_device *dev)
1427 struct intel_connector *connector;
1429 list_for_each_entry(connector, &dev->mode_config.connector_list, base.head)
1430 intel_backlight_device_unregister(connector);