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 #include <linux/moduleparam.h>
32 #include "intel_drv.h"
35 intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
36 struct drm_display_mode *adjusted_mode)
38 drm_mode_copy(adjusted_mode, fixed_mode);
40 drm_mode_set_crtcinfo(adjusted_mode, 0);
44 * intel_find_panel_downclock - find the reduced downclock for LVDS in EDID
46 * @fixed_mode : panel native mode
47 * @connector: LVDS/eDP connector
49 * Return downclock_avail
50 * Find the reduced downclock for LVDS/eDP in EDID.
52 struct drm_display_mode *
53 intel_find_panel_downclock(struct drm_device *dev,
54 struct drm_display_mode *fixed_mode,
55 struct drm_connector *connector)
57 struct drm_display_mode *scan, *tmp_mode;
60 temp_downclock = fixed_mode->clock;
63 list_for_each_entry(scan, &connector->probed_modes, head) {
65 * If one mode has the same resolution with the fixed_panel
66 * mode while they have the different refresh rate, it means
67 * that the reduced downclock is found. In such
68 * case we can set the different FPx0/1 to dynamically select
69 * between low and high frequency.
71 if (scan->hdisplay == fixed_mode->hdisplay &&
72 scan->hsync_start == fixed_mode->hsync_start &&
73 scan->hsync_end == fixed_mode->hsync_end &&
74 scan->htotal == fixed_mode->htotal &&
75 scan->vdisplay == fixed_mode->vdisplay &&
76 scan->vsync_start == fixed_mode->vsync_start &&
77 scan->vsync_end == fixed_mode->vsync_end &&
78 scan->vtotal == fixed_mode->vtotal) {
79 if (scan->clock < temp_downclock) {
81 * The downclock is already found. But we
82 * expect to find the lower downclock.
84 temp_downclock = scan->clock;
90 if (temp_downclock < fixed_mode->clock)
91 return drm_mode_duplicate(dev, tmp_mode);
96 /* adjusted_mode has been preset to be the panel's fixed mode */
98 intel_pch_panel_fitting(struct intel_crtc *intel_crtc,
99 struct intel_crtc_config *pipe_config,
102 struct drm_display_mode *adjusted_mode;
103 int x, y, width, height;
105 adjusted_mode = &pipe_config->adjusted_mode;
107 x = y = width = height = 0;
109 /* Native modes don't need fitting */
110 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
111 adjusted_mode->vdisplay == pipe_config->pipe_src_h)
114 switch (fitting_mode) {
115 case DRM_MODE_SCALE_CENTER:
116 width = pipe_config->pipe_src_w;
117 height = pipe_config->pipe_src_h;
118 x = (adjusted_mode->hdisplay - width + 1)/2;
119 y = (adjusted_mode->vdisplay - height + 1)/2;
122 case DRM_MODE_SCALE_ASPECT:
123 /* Scale but preserve the aspect ratio */
125 u32 scaled_width = adjusted_mode->hdisplay
126 * pipe_config->pipe_src_h;
127 u32 scaled_height = pipe_config->pipe_src_w
128 * adjusted_mode->vdisplay;
129 if (scaled_width > scaled_height) { /* pillar */
130 width = scaled_height / pipe_config->pipe_src_h;
133 x = (adjusted_mode->hdisplay - width + 1) / 2;
135 height = adjusted_mode->vdisplay;
136 } else if (scaled_width < scaled_height) { /* letter */
137 height = scaled_width / pipe_config->pipe_src_w;
140 y = (adjusted_mode->vdisplay - height + 1) / 2;
142 width = adjusted_mode->hdisplay;
145 width = adjusted_mode->hdisplay;
146 height = adjusted_mode->vdisplay;
151 case DRM_MODE_SCALE_FULLSCREEN:
153 width = adjusted_mode->hdisplay;
154 height = adjusted_mode->vdisplay;
158 WARN(1, "bad panel fit mode: %d\n", fitting_mode);
163 pipe_config->pch_pfit.pos = (x << 16) | y;
164 pipe_config->pch_pfit.size = (width << 16) | height;
165 pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0;
169 centre_horizontally(struct drm_display_mode *mode,
172 u32 border, sync_pos, blank_width, sync_width;
174 /* keep the hsync and hblank widths constant */
175 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
176 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
177 sync_pos = (blank_width - sync_width + 1) / 2;
179 border = (mode->hdisplay - width + 1) / 2;
180 border += border & 1; /* make the border even */
182 mode->crtc_hdisplay = width;
183 mode->crtc_hblank_start = width + border;
184 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
186 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
187 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
191 centre_vertically(struct drm_display_mode *mode,
194 u32 border, sync_pos, blank_width, sync_width;
196 /* keep the vsync and vblank widths constant */
197 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
198 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
199 sync_pos = (blank_width - sync_width + 1) / 2;
201 border = (mode->vdisplay - height + 1) / 2;
203 mode->crtc_vdisplay = height;
204 mode->crtc_vblank_start = height + border;
205 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
207 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
208 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
211 static inline u32 panel_fitter_scaling(u32 source, u32 target)
214 * Floating point operation is not supported. So the FACTOR
215 * is defined, which can avoid the floating point computation
216 * when calculating the panel ratio.
219 #define FACTOR (1 << ACCURACY)
220 u32 ratio = source * FACTOR / target;
221 return (FACTOR * ratio + FACTOR/2) / FACTOR;
224 static void i965_scale_aspect(struct intel_crtc_config *pipe_config,
227 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
228 u32 scaled_width = adjusted_mode->hdisplay *
229 pipe_config->pipe_src_h;
230 u32 scaled_height = pipe_config->pipe_src_w *
231 adjusted_mode->vdisplay;
233 /* 965+ is easy, it does everything in hw */
234 if (scaled_width > scaled_height)
235 *pfit_control |= PFIT_ENABLE |
237 else if (scaled_width < scaled_height)
238 *pfit_control |= PFIT_ENABLE |
240 else if (adjusted_mode->hdisplay != pipe_config->pipe_src_w)
241 *pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
244 static void i9xx_scale_aspect(struct intel_crtc_config *pipe_config,
245 u32 *pfit_control, u32 *pfit_pgm_ratios,
248 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
249 u32 scaled_width = adjusted_mode->hdisplay *
250 pipe_config->pipe_src_h;
251 u32 scaled_height = pipe_config->pipe_src_w *
252 adjusted_mode->vdisplay;
256 * For earlier chips we have to calculate the scaling
257 * ratio by hand and program it into the
258 * PFIT_PGM_RATIO register
260 if (scaled_width > scaled_height) { /* pillar */
261 centre_horizontally(adjusted_mode,
263 pipe_config->pipe_src_h);
265 *border = LVDS_BORDER_ENABLE;
266 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay) {
267 bits = panel_fitter_scaling(pipe_config->pipe_src_h,
268 adjusted_mode->vdisplay);
270 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
271 bits << PFIT_VERT_SCALE_SHIFT);
272 *pfit_control |= (PFIT_ENABLE |
273 VERT_INTERP_BILINEAR |
274 HORIZ_INTERP_BILINEAR);
276 } else if (scaled_width < scaled_height) { /* letter */
277 centre_vertically(adjusted_mode,
279 pipe_config->pipe_src_w);
281 *border = LVDS_BORDER_ENABLE;
282 if (pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
283 bits = panel_fitter_scaling(pipe_config->pipe_src_w,
284 adjusted_mode->hdisplay);
286 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
287 bits << PFIT_VERT_SCALE_SHIFT);
288 *pfit_control |= (PFIT_ENABLE |
289 VERT_INTERP_BILINEAR |
290 HORIZ_INTERP_BILINEAR);
293 /* Aspects match, Let hw scale both directions */
294 *pfit_control |= (PFIT_ENABLE |
295 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
296 VERT_INTERP_BILINEAR |
297 HORIZ_INTERP_BILINEAR);
301 void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc,
302 struct intel_crtc_config *pipe_config,
305 struct drm_device *dev = intel_crtc->base.dev;
306 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
307 struct drm_display_mode *adjusted_mode;
309 adjusted_mode = &pipe_config->adjusted_mode;
311 /* Native modes don't need fitting */
312 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
313 adjusted_mode->vdisplay == pipe_config->pipe_src_h)
316 switch (fitting_mode) {
317 case DRM_MODE_SCALE_CENTER:
319 * For centered modes, we have to calculate border widths &
320 * heights and modify the values programmed into the CRTC.
322 centre_horizontally(adjusted_mode, pipe_config->pipe_src_w);
323 centre_vertically(adjusted_mode, pipe_config->pipe_src_h);
324 border = LVDS_BORDER_ENABLE;
326 case DRM_MODE_SCALE_ASPECT:
327 /* Scale but preserve the aspect ratio */
328 if (INTEL_INFO(dev)->gen >= 4)
329 i965_scale_aspect(pipe_config, &pfit_control);
331 i9xx_scale_aspect(pipe_config, &pfit_control,
332 &pfit_pgm_ratios, &border);
334 case DRM_MODE_SCALE_FULLSCREEN:
336 * Full scaling, even if it changes the aspect ratio.
337 * Fortunately this is all done for us in hw.
339 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay ||
340 pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
341 pfit_control |= PFIT_ENABLE;
342 if (INTEL_INFO(dev)->gen >= 4)
343 pfit_control |= PFIT_SCALING_AUTO;
345 pfit_control |= (VERT_AUTO_SCALE |
346 VERT_INTERP_BILINEAR |
348 HORIZ_INTERP_BILINEAR);
352 WARN(1, "bad panel fit mode: %d\n", fitting_mode);
356 /* 965+ wants fuzzy fitting */
357 /* FIXME: handle multiple panels by failing gracefully */
358 if (INTEL_INFO(dev)->gen >= 4)
359 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
363 if ((pfit_control & PFIT_ENABLE) == 0) {
368 /* Make sure pre-965 set dither correctly for 18bpp panels. */
369 if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18)
370 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
372 pipe_config->gmch_pfit.control = pfit_control;
373 pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios;
374 pipe_config->gmch_pfit.lvds_border_bits = border;
377 enum drm_connector_status
378 intel_panel_detect(struct drm_device *dev)
380 struct drm_i915_private *dev_priv = dev->dev_private;
382 /* Assume that the BIOS does not lie through the OpRegion... */
383 if (!i915.panel_ignore_lid && dev_priv->opregion.lid_state) {
384 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
385 connector_status_connected :
386 connector_status_disconnected;
389 switch (i915.panel_ignore_lid) {
391 return connector_status_connected;
393 return connector_status_disconnected;
395 return connector_status_unknown;
400 * scale - scale values from one range to another
402 * @source_val: value in range [@source_min..@source_max]
404 * Return @source_val in range [@source_min..@source_max] scaled to range
405 * [@target_min..@target_max].
407 static uint32_t scale(uint32_t source_val,
408 uint32_t source_min, uint32_t source_max,
409 uint32_t target_min, uint32_t target_max)
413 WARN_ON(source_min > source_max);
414 WARN_ON(target_min > target_max);
417 source_val = clamp(source_val, source_min, source_max);
419 /* avoid overflows */
420 target_val = DIV_ROUND_CLOSEST_ULL((uint64_t)(source_val - source_min) *
421 (target_max - target_min), source_max - source_min);
422 target_val += target_min;
427 /* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */
428 static inline u32 scale_user_to_hw(struct intel_connector *connector,
429 u32 user_level, u32 user_max)
431 struct intel_panel *panel = &connector->panel;
433 return scale(user_level, 0, user_max,
434 panel->backlight.min, panel->backlight.max);
437 /* Scale user_level in range [0..user_max] to [0..hw_max], clamping the result
438 * to [hw_min..hw_max]. */
439 static inline u32 clamp_user_to_hw(struct intel_connector *connector,
440 u32 user_level, u32 user_max)
442 struct intel_panel *panel = &connector->panel;
445 hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max);
446 hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max);
451 /* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */
452 static inline u32 scale_hw_to_user(struct intel_connector *connector,
453 u32 hw_level, u32 user_max)
455 struct intel_panel *panel = &connector->panel;
457 return scale(hw_level, panel->backlight.min, panel->backlight.max,
461 static u32 intel_panel_compute_brightness(struct intel_connector *connector,
464 struct drm_device *dev = connector->base.dev;
465 struct drm_i915_private *dev_priv = dev->dev_private;
466 struct intel_panel *panel = &connector->panel;
468 WARN_ON(panel->backlight.max == 0);
470 if (i915.invert_brightness < 0)
473 if (i915.invert_brightness > 0 ||
474 dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) {
475 return panel->backlight.max - val;
481 static u32 bdw_get_backlight(struct intel_connector *connector)
483 struct drm_device *dev = connector->base.dev;
484 struct drm_i915_private *dev_priv = dev->dev_private;
486 return I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK;
489 static u32 pch_get_backlight(struct intel_connector *connector)
491 struct drm_device *dev = connector->base.dev;
492 struct drm_i915_private *dev_priv = dev->dev_private;
494 return I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
497 static u32 i9xx_get_backlight(struct intel_connector *connector)
499 struct drm_device *dev = connector->base.dev;
500 struct drm_i915_private *dev_priv = dev->dev_private;
501 struct intel_panel *panel = &connector->panel;
504 val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
505 if (INTEL_INFO(dev)->gen < 4)
508 if (panel->backlight.combination_mode) {
511 pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc);
518 static u32 _vlv_get_backlight(struct drm_device *dev, enum i915_pipe pipe)
520 struct drm_i915_private *dev_priv = dev->dev_private;
522 return I915_READ(VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK;
525 static u32 vlv_get_backlight(struct intel_connector *connector)
527 struct drm_device *dev = connector->base.dev;
528 enum i915_pipe pipe = intel_get_pipe_from_connector(connector);
530 return _vlv_get_backlight(dev, pipe);
534 static u32 intel_panel_get_backlight(struct intel_connector *connector)
536 struct drm_device *dev = connector->base.dev;
537 struct drm_i915_private *dev_priv = dev->dev_private;
541 spin_lock_irqsave(&dev_priv->backlight_lock, flags);
543 val = dev_priv->display.get_backlight(connector);
544 val = intel_panel_compute_brightness(connector, val);
546 spin_unlock_irqrestore(&dev_priv->backlight_lock, flags);
548 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
553 static void bdw_set_backlight(struct intel_connector *connector, u32 level)
555 struct drm_device *dev = connector->base.dev;
556 struct drm_i915_private *dev_priv = dev->dev_private;
557 u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK;
558 I915_WRITE(BLC_PWM_PCH_CTL2, val | level);
561 static void pch_set_backlight(struct intel_connector *connector, u32 level)
563 struct drm_device *dev = connector->base.dev;
564 struct drm_i915_private *dev_priv = dev->dev_private;
567 tmp = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
568 I915_WRITE(BLC_PWM_CPU_CTL, tmp | level);
571 static void i9xx_set_backlight(struct intel_connector *connector, u32 level)
573 struct drm_device *dev = connector->base.dev;
574 struct drm_i915_private *dev_priv = dev->dev_private;
575 struct intel_panel *panel = &connector->panel;
578 WARN_ON(panel->backlight.max == 0);
580 if (panel->backlight.combination_mode) {
583 lbpc = level * 0xfe / panel->backlight.max + 1;
585 pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
589 mask = BACKLIGHT_DUTY_CYCLE_MASK;
592 mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV;
595 tmp = I915_READ(BLC_PWM_CTL) & ~mask;
596 I915_WRITE(BLC_PWM_CTL, tmp | level);
599 static void vlv_set_backlight(struct intel_connector *connector, u32 level)
601 struct drm_device *dev = connector->base.dev;
602 struct drm_i915_private *dev_priv = dev->dev_private;
603 enum i915_pipe pipe = intel_get_pipe_from_connector(connector);
606 tmp = I915_READ(VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK;
607 I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level);
611 intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level)
613 struct drm_device *dev = connector->base.dev;
614 struct drm_i915_private *dev_priv = dev->dev_private;
616 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
618 level = intel_panel_compute_brightness(connector, level);
619 dev_priv->display.set_backlight(connector, level);
622 /* set backlight brightness to level in range [0..max], scaling wrt hw min */
623 static void intel_panel_set_backlight(struct intel_connector *connector,
624 u32 user_level, u32 user_max)
626 struct drm_device *dev = connector->base.dev;
627 struct drm_i915_private *dev_priv = dev->dev_private;
628 struct intel_panel *panel = &connector->panel;
629 enum i915_pipe pipe = intel_get_pipe_from_connector(connector);
632 if (!panel->backlight.present || pipe == INVALID_PIPE)
635 spin_lock(&dev_priv->backlight_lock);
637 WARN_ON(panel->backlight.max == 0);
639 hw_level = scale_user_to_hw(connector, user_level, user_max);
640 panel->backlight.level = hw_level;
642 if (panel->backlight.enabled)
643 intel_panel_actually_set_backlight(connector, hw_level);
645 spin_unlock(&dev_priv->backlight_lock);
648 /* set backlight brightness to level in range [0..max], assuming hw min is
651 void intel_panel_set_backlight_acpi(struct intel_connector *connector,
652 u32 user_level, u32 user_max)
654 struct drm_device *dev = connector->base.dev;
655 struct drm_i915_private *dev_priv = dev->dev_private;
656 struct intel_panel *panel = &connector->panel;
657 enum i915_pipe pipe = intel_get_pipe_from_connector(connector);
660 if (!panel->backlight.present || pipe == INVALID_PIPE)
663 spin_lock(&dev_priv->backlight_lock);
665 WARN_ON(panel->backlight.max == 0);
667 hw_level = clamp_user_to_hw(connector, user_level, user_max);
668 panel->backlight.level = hw_level;
670 if (panel->backlight.device)
671 panel->backlight.device->props.brightness =
672 scale_hw_to_user(connector,
673 panel->backlight.level,
674 panel->backlight.device->props.max_brightness);
676 if (panel->backlight.enabled)
677 intel_panel_actually_set_backlight(connector, hw_level);
679 spin_unlock(&dev_priv->backlight_lock);
682 static void pch_disable_backlight(struct intel_connector *connector)
684 struct drm_device *dev = connector->base.dev;
685 struct drm_i915_private *dev_priv = dev->dev_private;
688 intel_panel_actually_set_backlight(connector, 0);
690 tmp = I915_READ(BLC_PWM_CPU_CTL2);
691 I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE);
693 tmp = I915_READ(BLC_PWM_PCH_CTL1);
694 I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE);
697 static void i9xx_disable_backlight(struct intel_connector *connector)
699 intel_panel_actually_set_backlight(connector, 0);
702 static void i965_disable_backlight(struct intel_connector *connector)
704 struct drm_device *dev = connector->base.dev;
705 struct drm_i915_private *dev_priv = dev->dev_private;
708 intel_panel_actually_set_backlight(connector, 0);
710 tmp = I915_READ(BLC_PWM_CTL2);
711 I915_WRITE(BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE);
714 static void vlv_disable_backlight(struct intel_connector *connector)
716 struct drm_device *dev = connector->base.dev;
717 struct drm_i915_private *dev_priv = dev->dev_private;
718 enum i915_pipe pipe = intel_get_pipe_from_connector(connector);
721 intel_panel_actually_set_backlight(connector, 0);
723 tmp = I915_READ(VLV_BLC_PWM_CTL2(pipe));
724 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE);
727 void intel_panel_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 struct intel_panel *panel = &connector->panel;
732 enum i915_pipe pipe = intel_get_pipe_from_connector(connector);
734 if (!panel->backlight.present || pipe == INVALID_PIPE)
738 * Do not disable backlight on the vgaswitcheroo path. When switching
739 * away from i915, the other client may depend on i915 to handle the
740 * backlight. This will leave the backlight on unnecessarily when
741 * another client is not activated.
743 if (dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) {
744 DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n");
748 spin_lock(&dev_priv->backlight_lock);
750 if (panel->backlight.device)
751 panel->backlight.device->props.power = FB_BLANK_POWERDOWN;
752 panel->backlight.enabled = false;
753 dev_priv->display.disable_backlight(connector);
755 spin_unlock(&dev_priv->backlight_lock);
758 static void bdw_enable_backlight(struct intel_connector *connector)
760 struct drm_device *dev = connector->base.dev;
761 struct drm_i915_private *dev_priv = dev->dev_private;
762 struct intel_panel *panel = &connector->panel;
763 u32 pch_ctl1, pch_ctl2;
765 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
766 if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
767 DRM_DEBUG_KMS("pch backlight already enabled\n");
768 pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
769 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
772 pch_ctl2 = panel->backlight.max << 16;
773 I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
776 if (panel->backlight.active_low_pwm)
777 pch_ctl1 |= BLM_PCH_POLARITY;
779 /* BDW always uses the pch pwm controls. */
780 pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE;
782 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
783 POSTING_READ(BLC_PWM_PCH_CTL1);
784 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
786 /* This won't stick until the above enable. */
787 intel_panel_actually_set_backlight(connector, panel->backlight.level);
790 static void pch_enable_backlight(struct intel_connector *connector)
792 struct drm_device *dev = connector->base.dev;
793 struct drm_i915_private *dev_priv = dev->dev_private;
794 struct intel_panel *panel = &connector->panel;
795 enum i915_pipe pipe = intel_get_pipe_from_connector(connector);
796 enum transcoder cpu_transcoder =
797 intel_pipe_to_cpu_transcoder(dev_priv, pipe);
798 u32 cpu_ctl2, pch_ctl1, pch_ctl2;
800 cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
801 if (cpu_ctl2 & BLM_PWM_ENABLE) {
802 DRM_DEBUG_KMS("cpu backlight already enabled\n");
803 cpu_ctl2 &= ~BLM_PWM_ENABLE;
804 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
807 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
808 if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
809 DRM_DEBUG_KMS("pch backlight already enabled\n");
810 pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
811 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
814 if (cpu_transcoder == TRANSCODER_EDP)
815 cpu_ctl2 = BLM_TRANSCODER_EDP;
817 cpu_ctl2 = BLM_PIPE(cpu_transcoder);
818 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
819 POSTING_READ(BLC_PWM_CPU_CTL2);
820 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE);
822 /* This won't stick until the above enable. */
823 intel_panel_actually_set_backlight(connector, panel->backlight.level);
825 pch_ctl2 = panel->backlight.max << 16;
826 I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
829 if (panel->backlight.active_low_pwm)
830 pch_ctl1 |= BLM_PCH_POLARITY;
832 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
833 POSTING_READ(BLC_PWM_PCH_CTL1);
834 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
837 static void i9xx_enable_backlight(struct intel_connector *connector)
839 struct drm_device *dev = connector->base.dev;
840 struct drm_i915_private *dev_priv = dev->dev_private;
841 struct intel_panel *panel = &connector->panel;
844 ctl = I915_READ(BLC_PWM_CTL);
845 if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) {
846 DRM_DEBUG_KMS("backlight already enabled\n");
847 I915_WRITE(BLC_PWM_CTL, 0);
850 freq = panel->backlight.max;
851 if (panel->backlight.combination_mode)
855 if (panel->backlight.combination_mode)
856 ctl |= BLM_LEGACY_MODE;
857 if (IS_PINEVIEW(dev) && panel->backlight.active_low_pwm)
858 ctl |= BLM_POLARITY_PNV;
860 I915_WRITE(BLC_PWM_CTL, ctl);
861 POSTING_READ(BLC_PWM_CTL);
863 /* XXX: combine this into above write? */
864 intel_panel_actually_set_backlight(connector, panel->backlight.level);
867 static void i965_enable_backlight(struct intel_connector *connector)
869 struct drm_device *dev = connector->base.dev;
870 struct drm_i915_private *dev_priv = dev->dev_private;
871 struct intel_panel *panel = &connector->panel;
872 enum i915_pipe pipe = intel_get_pipe_from_connector(connector);
875 ctl2 = I915_READ(BLC_PWM_CTL2);
876 if (ctl2 & BLM_PWM_ENABLE) {
877 DRM_DEBUG_KMS("backlight already enabled\n");
878 ctl2 &= ~BLM_PWM_ENABLE;
879 I915_WRITE(BLC_PWM_CTL2, ctl2);
882 freq = panel->backlight.max;
883 if (panel->backlight.combination_mode)
887 I915_WRITE(BLC_PWM_CTL, ctl);
889 ctl2 = BLM_PIPE(pipe);
890 if (panel->backlight.combination_mode)
891 ctl2 |= BLM_COMBINATION_MODE;
892 if (panel->backlight.active_low_pwm)
893 ctl2 |= BLM_POLARITY_I965;
894 I915_WRITE(BLC_PWM_CTL2, ctl2);
895 POSTING_READ(BLC_PWM_CTL2);
896 I915_WRITE(BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE);
898 intel_panel_actually_set_backlight(connector, panel->backlight.level);
901 static void vlv_enable_backlight(struct intel_connector *connector)
903 struct drm_device *dev = connector->base.dev;
904 struct drm_i915_private *dev_priv = dev->dev_private;
905 struct intel_panel *panel = &connector->panel;
906 enum i915_pipe pipe = intel_get_pipe_from_connector(connector);
909 ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe));
910 if (ctl2 & BLM_PWM_ENABLE) {
911 DRM_DEBUG_KMS("backlight already enabled\n");
912 ctl2 &= ~BLM_PWM_ENABLE;
913 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
916 ctl = panel->backlight.max << 16;
917 I915_WRITE(VLV_BLC_PWM_CTL(pipe), ctl);
919 /* XXX: combine this into above write? */
920 intel_panel_actually_set_backlight(connector, panel->backlight.level);
923 if (panel->backlight.active_low_pwm)
924 ctl2 |= BLM_POLARITY_I965;
925 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
926 POSTING_READ(VLV_BLC_PWM_CTL2(pipe));
927 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE);
930 void intel_panel_enable_backlight(struct intel_connector *connector)
932 struct drm_device *dev = connector->base.dev;
933 struct drm_i915_private *dev_priv = dev->dev_private;
934 struct intel_panel *panel = &connector->panel;
935 enum i915_pipe pipe = intel_get_pipe_from_connector(connector);
937 if (!panel->backlight.present || pipe == INVALID_PIPE)
940 DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));
942 spin_lock(&dev_priv->backlight_lock);
944 WARN_ON(panel->backlight.max == 0);
946 if (panel->backlight.level == 0) {
947 panel->backlight.level = panel->backlight.max;
948 if (panel->backlight.device)
949 panel->backlight.device->props.brightness =
950 scale_hw_to_user(connector,
951 panel->backlight.level,
952 panel->backlight.device->props.max_brightness);
955 dev_priv->display.enable_backlight(connector);
956 panel->backlight.enabled = true;
957 if (panel->backlight.device)
958 panel->backlight.device->props.power = FB_BLANK_UNBLANK;
960 spin_unlock(&dev_priv->backlight_lock);
963 #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
964 static int intel_backlight_device_update_status(struct backlight_device *bd)
966 struct intel_connector *connector = bl_get_data(bd);
967 struct intel_panel *panel = &connector->panel;
968 struct drm_device *dev = connector->base.dev;
970 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
971 DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n",
972 bd->props.brightness, bd->props.max_brightness);
973 intel_panel_set_backlight(connector, bd->props.brightness,
974 bd->props.max_brightness);
977 * Allow flipping bl_power as a sub-state of enabled. Sadly the
978 * backlight class device does not make it easy to to differentiate
979 * between callbacks for brightness and bl_power, so our backlight_power
980 * callback needs to take this into account.
982 if (panel->backlight.enabled) {
983 if (panel->backlight_power) {
984 bool enable = bd->props.power == FB_BLANK_UNBLANK &&
985 bd->props.brightness != 0;
986 panel->backlight_power(connector, enable);
989 bd->props.power = FB_BLANK_POWERDOWN;
992 drm_modeset_unlock(&dev->mode_config.connection_mutex);
996 static int intel_backlight_device_get_brightness(struct backlight_device *bd)
998 struct intel_connector *connector = bl_get_data(bd);
999 struct drm_device *dev = connector->base.dev;
1000 struct drm_i915_private *dev_priv = dev->dev_private;
1004 intel_runtime_pm_get(dev_priv);
1005 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1007 hw_level = intel_panel_get_backlight(connector);
1008 ret = scale_hw_to_user(connector, hw_level, bd->props.max_brightness);
1010 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1011 intel_runtime_pm_put(dev_priv);
1016 static const struct backlight_ops intel_backlight_device_ops = {
1017 .update_status = intel_backlight_device_update_status,
1018 .get_brightness = intel_backlight_device_get_brightness,
1021 static int intel_backlight_device_register(struct intel_connector *connector)
1023 struct intel_panel *panel = &connector->panel;
1024 struct backlight_properties props;
1026 if (WARN_ON(panel->backlight.device))
1029 WARN_ON(panel->backlight.max == 0);
1031 memset(&props, 0, sizeof(props));
1032 props.type = BACKLIGHT_RAW;
1035 * Note: Everything should work even if the backlight device max
1036 * presented to the userspace is arbitrarily chosen.
1038 props.max_brightness = panel->backlight.max;
1039 props.brightness = scale_hw_to_user(connector,
1040 panel->backlight.level,
1041 props.max_brightness);
1043 if (panel->backlight.enabled)
1044 props.power = FB_BLANK_UNBLANK;
1046 props.power = FB_BLANK_POWERDOWN;
1049 * Note: using the same name independent of the connector prevents
1050 * registration of multiple backlight devices in the driver.
1052 panel->backlight.device =
1053 backlight_device_register("intel_backlight",
1054 connector->base.kdev,
1056 &intel_backlight_device_ops, &props);
1058 if (IS_ERR(panel->backlight.device)) {
1059 DRM_ERROR("Failed to register backlight: %ld\n",
1060 PTR_ERR(panel->backlight.device));
1061 panel->backlight.device = NULL;
1067 static void intel_backlight_device_unregister(struct intel_connector *connector)
1069 struct intel_panel *panel = &connector->panel;
1071 if (panel->backlight.device) {
1072 backlight_device_unregister(panel->backlight.device);
1073 panel->backlight.device = NULL;
1076 #else /* CONFIG_BACKLIGHT_CLASS_DEVICE */
1077 static int intel_backlight_device_register(struct intel_connector *connector)
1081 static void intel_backlight_device_unregister(struct intel_connector *connector)
1084 #endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */
1087 * Note: The setup hooks can't assume pipe is set!
1089 * XXX: Query mode clock or hardware clock and program PWM modulation frequency
1090 * appropriately when it's 0. Use VBT and/or sane defaults.
1092 static u32 get_backlight_min_vbt(struct intel_connector *connector)
1094 struct drm_device *dev = connector->base.dev;
1095 struct drm_i915_private *dev_priv = dev->dev_private;
1096 struct intel_panel *panel = &connector->panel;
1099 WARN_ON(panel->backlight.max == 0);
1102 * XXX: If the vbt value is 255, it makes min equal to max, which leads
1103 * to problems. There are such machines out there. Either our
1104 * interpretation is wrong or the vbt has bogus data. Or both. Safeguard
1105 * against this by letting the minimum be at most (arbitrarily chosen)
1108 min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64);
1109 if (min != dev_priv->vbt.backlight.min_brightness) {
1110 DRM_DEBUG_KMS("clamping VBT min backlight %d/255 to %d/255\n",
1111 dev_priv->vbt.backlight.min_brightness, min);
1114 /* vbt value is a coefficient in range [0..255] */
1115 return scale(min, 0, 255, 0, panel->backlight.max);
1118 static int bdw_setup_backlight(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;
1123 u32 pch_ctl1, pch_ctl2, val;
1125 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
1126 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;
1128 pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
1129 panel->backlight.max = pch_ctl2 >> 16;
1130 if (!panel->backlight.max)
1133 panel->backlight.min = get_backlight_min_vbt(connector);
1135 val = bdw_get_backlight(connector);
1136 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1138 panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) &&
1139 panel->backlight.level != 0;
1144 static int pch_setup_backlight(struct intel_connector *connector)
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 cpu_ctl2, 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 = pch_get_backlight(connector);
1162 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1164 cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
1165 panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) &&
1166 (pch_ctl1 & BLM_PCH_PWM_ENABLE) && panel->backlight.level != 0;
1171 static int i9xx_setup_backlight(struct intel_connector *connector)
1173 struct drm_device *dev = connector->base.dev;
1174 struct drm_i915_private *dev_priv = dev->dev_private;
1175 struct intel_panel *panel = &connector->panel;
1178 ctl = I915_READ(BLC_PWM_CTL);
1180 if (IS_GEN2(dev) || IS_I915GM(dev) || IS_I945GM(dev))
1181 panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE;
1183 if (IS_PINEVIEW(dev))
1184 panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV;
1186 panel->backlight.max = ctl >> 17;
1187 if (panel->backlight.combination_mode)
1188 panel->backlight.max *= 0xff;
1190 if (!panel->backlight.max)
1193 panel->backlight.min = get_backlight_min_vbt(connector);
1195 val = i9xx_get_backlight(connector);
1196 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1198 panel->backlight.enabled = panel->backlight.level != 0;
1203 static int i965_setup_backlight(struct intel_connector *connector)
1205 struct drm_device *dev = connector->base.dev;
1206 struct drm_i915_private *dev_priv = dev->dev_private;
1207 struct intel_panel *panel = &connector->panel;
1210 ctl2 = I915_READ(BLC_PWM_CTL2);
1211 panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE;
1212 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;
1214 ctl = I915_READ(BLC_PWM_CTL);
1215 panel->backlight.max = ctl >> 16;
1216 if (panel->backlight.combination_mode)
1217 panel->backlight.max *= 0xff;
1219 if (!panel->backlight.max)
1222 panel->backlight.min = get_backlight_min_vbt(connector);
1224 val = i9xx_get_backlight(connector);
1225 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1227 panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&
1228 panel->backlight.level != 0;
1233 static int vlv_setup_backlight(struct intel_connector *connector)
1235 struct drm_device *dev = connector->base.dev;
1236 struct drm_i915_private *dev_priv = dev->dev_private;
1237 struct intel_panel *panel = &connector->panel;
1238 enum i915_pipe pipe;
1241 for_each_pipe(dev_priv, pipe) {
1242 u32 cur_val = I915_READ(VLV_BLC_PWM_CTL(pipe));
1244 /* Skip if the modulation freq is already set */
1245 if (cur_val & ~BACKLIGHT_DUTY_CYCLE_MASK)
1248 cur_val &= BACKLIGHT_DUTY_CYCLE_MASK;
1249 I915_WRITE(VLV_BLC_PWM_CTL(pipe), (0xf42 << 16) |
1253 ctl2 = I915_READ(VLV_BLC_PWM_CTL2(PIPE_A));
1254 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;
1256 ctl = I915_READ(VLV_BLC_PWM_CTL(PIPE_A));
1257 panel->backlight.max = ctl >> 16;
1258 if (!panel->backlight.max)
1261 panel->backlight.min = get_backlight_min_vbt(connector);
1263 val = _vlv_get_backlight(dev, PIPE_A);
1264 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1266 panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&
1267 panel->backlight.level != 0;
1272 #ifdef __DragonFly__
1274 * Read max backlight level
1277 sysctl_backlight_max(SYSCTL_HANDLER_ARGS)
1280 struct intel_connector *connector = arg1;
1281 struct drm_device *dev = connector->base.dev;
1282 struct drm_i915_private *dev_priv = dev->dev_private;
1283 struct intel_panel *panel = &connector->panel;
1285 spin_lock(&dev_priv->backlight_lock);
1286 val = panel->backlight.max;
1287 spin_unlock(&dev_priv->backlight_lock);
1289 err = sysctl_handle_int(oidp, &val, 0, req);
1294 * Read/write backlight level
1297 sysctl_backlight_handler(SYSCTL_HANDLER_ARGS)
1299 struct intel_connector *connector = arg1;
1300 struct drm_device *dev = connector->base.dev;
1301 struct drm_i915_private *dev_priv = dev->dev_private;
1302 struct intel_panel *panel = &connector->panel;
1306 val = panel->backlight.level;
1308 spin_lock(&dev_priv->backlight_lock);
1309 max_brightness = panel->backlight.max;
1310 spin_unlock(&dev_priv->backlight_lock);
1312 err = sysctl_handle_int(oidp, &val, 0, req);
1313 if (err != 0 || req->newptr == NULL) {
1317 if (val != panel->backlight.level && val >=0 &&
1318 val <= max_brightness) {
1319 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1320 intel_panel_set_backlight(arg1, val, max_brightness);
1321 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1326 #endif /* __DragonFly__ */
1328 int intel_panel_setup_backlight(struct drm_connector *connector)
1330 struct drm_device *dev = connector->dev;
1331 struct drm_i915_private *dev_priv = dev->dev_private;
1332 struct intel_connector *intel_connector = to_intel_connector(connector);
1333 struct intel_panel *panel = &intel_connector->panel;
1336 if (!dev_priv->vbt.backlight.present) {
1337 if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) {
1338 DRM_DEBUG_KMS("no backlight present per VBT, but present per quirk\n");
1340 DRM_DEBUG_KMS("no backlight present per VBT\n");
1345 /* set level and max in panel struct */
1346 spin_lock(&dev_priv->backlight_lock);
1347 ret = dev_priv->display.setup_backlight(intel_connector);
1348 spin_unlock(&dev_priv->backlight_lock);
1351 DRM_DEBUG_KMS("failed to setup backlight for connector %s\n",
1356 intel_backlight_device_register(intel_connector);
1358 panel->backlight.present = true;
1360 #ifdef __DragonFly__
1361 SYSCTL_ADD_PROC(&connector->dev->sysctl->ctx, &sysctl__hw_children,
1362 OID_AUTO, "backlight_max",
1363 CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_ANYBODY,
1364 connector, sizeof(int),
1365 sysctl_backlight_max,
1366 "I", "Max backlight level");
1367 SYSCTL_ADD_PROC(&connector->dev->sysctl->ctx, &sysctl__hw_children,
1368 OID_AUTO, "backlight_level",
1369 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY,
1370 connector, sizeof(int),
1371 sysctl_backlight_handler,
1372 "I", "Backlight level");
1375 DRM_DEBUG_KMS("backlight initialized, %s, brightness %u/%u, "
1376 "sysfs interface %sregistered\n",
1377 panel->backlight.enabled ? "enabled" : "disabled",
1378 panel->backlight.level, panel->backlight.max,
1379 panel->backlight.device ? "" : "not ");
1384 void intel_panel_destroy_backlight(struct drm_connector *connector)
1386 struct intel_connector *intel_connector = to_intel_connector(connector);
1387 struct intel_panel *panel = &intel_connector->panel;
1389 panel->backlight.present = false;
1390 intel_backlight_device_unregister(intel_connector);
1393 /* Set up chip specific backlight functions */
1394 void intel_panel_init_backlight_funcs(struct drm_device *dev)
1396 struct drm_i915_private *dev_priv = dev->dev_private;
1398 if (IS_BROADWELL(dev)) {
1399 dev_priv->display.setup_backlight = bdw_setup_backlight;
1400 dev_priv->display.enable_backlight = bdw_enable_backlight;
1401 dev_priv->display.disable_backlight = pch_disable_backlight;
1402 dev_priv->display.set_backlight = bdw_set_backlight;
1403 dev_priv->display.get_backlight = bdw_get_backlight;
1404 } else if (HAS_PCH_SPLIT(dev)) {
1405 dev_priv->display.setup_backlight = pch_setup_backlight;
1406 dev_priv->display.enable_backlight = pch_enable_backlight;
1407 dev_priv->display.disable_backlight = pch_disable_backlight;
1408 dev_priv->display.set_backlight = pch_set_backlight;
1409 dev_priv->display.get_backlight = pch_get_backlight;
1410 } else if (IS_VALLEYVIEW(dev)) {
1411 dev_priv->display.setup_backlight = vlv_setup_backlight;
1412 dev_priv->display.enable_backlight = vlv_enable_backlight;
1413 dev_priv->display.disable_backlight = vlv_disable_backlight;
1414 dev_priv->display.set_backlight = vlv_set_backlight;
1415 dev_priv->display.get_backlight = vlv_get_backlight;
1416 } else if (IS_GEN4(dev)) {
1417 dev_priv->display.setup_backlight = i965_setup_backlight;
1418 dev_priv->display.enable_backlight = i965_enable_backlight;
1419 dev_priv->display.disable_backlight = i965_disable_backlight;
1420 dev_priv->display.set_backlight = i9xx_set_backlight;
1421 dev_priv->display.get_backlight = i9xx_get_backlight;
1423 dev_priv->display.setup_backlight = i9xx_setup_backlight;
1424 dev_priv->display.enable_backlight = i9xx_enable_backlight;
1425 dev_priv->display.disable_backlight = i9xx_disable_backlight;
1426 dev_priv->display.set_backlight = i9xx_set_backlight;
1427 dev_priv->display.get_backlight = i9xx_get_backlight;
1431 int intel_panel_init(struct intel_panel *panel,
1432 struct drm_display_mode *fixed_mode,
1433 struct drm_display_mode *downclock_mode)
1435 panel->fixed_mode = fixed_mode;
1436 panel->downclock_mode = downclock_mode;
1441 void intel_panel_fini(struct intel_panel *panel)
1443 struct intel_connector *intel_connector =
1444 container_of(panel, struct intel_connector, panel);
1446 if (panel->fixed_mode)
1447 drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);
1449 if (panel->downclock_mode)
1450 drm_mode_destroy(intel_connector->base.dev,
1451 panel->downclock_mode);