2 * Copyright © 2006-2010 Intel Corporation
3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Eric Anholt <eric@anholt.net>
26 * Dave Airlie <airlied@linux.ie>
27 * Jesse Barnes <jesse.barnes@intel.com>
28 * Chris Wilson <chris@chris-wilson.co.uk>
31 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
33 #include <linux/moduleparam.h>
34 #include "intel_drv.h"
37 intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
38 struct drm_display_mode *adjusted_mode)
40 drm_mode_copy(adjusted_mode, fixed_mode);
42 drm_mode_set_crtcinfo(adjusted_mode, 0);
45 /* adjusted_mode has been preset to be the panel's fixed mode */
47 intel_pch_panel_fitting(struct intel_crtc *intel_crtc,
48 struct intel_crtc_config *pipe_config,
51 struct drm_display_mode *adjusted_mode;
52 int x, y, width, height;
54 adjusted_mode = &pipe_config->adjusted_mode;
56 x = y = width = height = 0;
58 /* Native modes don't need fitting */
59 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
60 adjusted_mode->vdisplay == pipe_config->pipe_src_h)
63 switch (fitting_mode) {
64 case DRM_MODE_SCALE_CENTER:
65 width = pipe_config->pipe_src_w;
66 height = pipe_config->pipe_src_h;
67 x = (adjusted_mode->hdisplay - width + 1)/2;
68 y = (adjusted_mode->vdisplay - height + 1)/2;
71 case DRM_MODE_SCALE_ASPECT:
72 /* Scale but preserve the aspect ratio */
74 u32 scaled_width = adjusted_mode->hdisplay
75 * pipe_config->pipe_src_h;
76 u32 scaled_height = pipe_config->pipe_src_w
77 * adjusted_mode->vdisplay;
78 if (scaled_width > scaled_height) { /* pillar */
79 width = scaled_height / pipe_config->pipe_src_h;
82 x = (adjusted_mode->hdisplay - width + 1) / 2;
84 height = adjusted_mode->vdisplay;
85 } else if (scaled_width < scaled_height) { /* letter */
86 height = scaled_width / pipe_config->pipe_src_w;
89 y = (adjusted_mode->vdisplay - height + 1) / 2;
91 width = adjusted_mode->hdisplay;
94 width = adjusted_mode->hdisplay;
95 height = adjusted_mode->vdisplay;
100 case DRM_MODE_SCALE_FULLSCREEN:
102 width = adjusted_mode->hdisplay;
103 height = adjusted_mode->vdisplay;
107 WARN(1, "bad panel fit mode: %d\n", fitting_mode);
112 pipe_config->pch_pfit.pos = (x << 16) | y;
113 pipe_config->pch_pfit.size = (width << 16) | height;
114 pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0;
118 centre_horizontally(struct drm_display_mode *mode,
121 u32 border, sync_pos, blank_width, sync_width;
123 /* keep the hsync and hblank widths constant */
124 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
125 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
126 sync_pos = (blank_width - sync_width + 1) / 2;
128 border = (mode->hdisplay - width + 1) / 2;
129 border += border & 1; /* make the border even */
131 mode->crtc_hdisplay = width;
132 mode->crtc_hblank_start = width + border;
133 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
135 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
136 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
140 centre_vertically(struct drm_display_mode *mode,
143 u32 border, sync_pos, blank_width, sync_width;
145 /* keep the vsync and vblank widths constant */
146 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
147 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
148 sync_pos = (blank_width - sync_width + 1) / 2;
150 border = (mode->vdisplay - height + 1) / 2;
152 mode->crtc_vdisplay = height;
153 mode->crtc_vblank_start = height + border;
154 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
156 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
157 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
160 static inline u32 panel_fitter_scaling(u32 source, u32 target)
163 * Floating point operation is not supported. So the FACTOR
164 * is defined, which can avoid the floating point computation
165 * when calculating the panel ratio.
168 #define FACTOR (1 << ACCURACY)
169 u32 ratio = source * FACTOR / target;
170 return (FACTOR * ratio + FACTOR/2) / FACTOR;
173 static void i965_scale_aspect(struct intel_crtc_config *pipe_config,
176 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
177 u32 scaled_width = adjusted_mode->hdisplay *
178 pipe_config->pipe_src_h;
179 u32 scaled_height = pipe_config->pipe_src_w *
180 adjusted_mode->vdisplay;
182 /* 965+ is easy, it does everything in hw */
183 if (scaled_width > scaled_height)
184 *pfit_control |= PFIT_ENABLE |
186 else if (scaled_width < scaled_height)
187 *pfit_control |= PFIT_ENABLE |
189 else if (adjusted_mode->hdisplay != pipe_config->pipe_src_w)
190 *pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
193 static void i9xx_scale_aspect(struct intel_crtc_config *pipe_config,
194 u32 *pfit_control, u32 *pfit_pgm_ratios,
197 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
198 u32 scaled_width = adjusted_mode->hdisplay *
199 pipe_config->pipe_src_h;
200 u32 scaled_height = pipe_config->pipe_src_w *
201 adjusted_mode->vdisplay;
205 * For earlier chips we have to calculate the scaling
206 * ratio by hand and program it into the
207 * PFIT_PGM_RATIO register
209 if (scaled_width > scaled_height) { /* pillar */
210 centre_horizontally(adjusted_mode,
212 pipe_config->pipe_src_h);
214 *border = LVDS_BORDER_ENABLE;
215 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay) {
216 bits = panel_fitter_scaling(pipe_config->pipe_src_h,
217 adjusted_mode->vdisplay);
219 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
220 bits << PFIT_VERT_SCALE_SHIFT);
221 *pfit_control |= (PFIT_ENABLE |
222 VERT_INTERP_BILINEAR |
223 HORIZ_INTERP_BILINEAR);
225 } else if (scaled_width < scaled_height) { /* letter */
226 centre_vertically(adjusted_mode,
228 pipe_config->pipe_src_w);
230 *border = LVDS_BORDER_ENABLE;
231 if (pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
232 bits = panel_fitter_scaling(pipe_config->pipe_src_w,
233 adjusted_mode->hdisplay);
235 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
236 bits << PFIT_VERT_SCALE_SHIFT);
237 *pfit_control |= (PFIT_ENABLE |
238 VERT_INTERP_BILINEAR |
239 HORIZ_INTERP_BILINEAR);
242 /* Aspects match, Let hw scale both directions */
243 *pfit_control |= (PFIT_ENABLE |
244 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
245 VERT_INTERP_BILINEAR |
246 HORIZ_INTERP_BILINEAR);
250 void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc,
251 struct intel_crtc_config *pipe_config,
254 struct drm_device *dev = intel_crtc->base.dev;
255 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
256 struct drm_display_mode *adjusted_mode;
258 adjusted_mode = &pipe_config->adjusted_mode;
260 /* Native modes don't need fitting */
261 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
262 adjusted_mode->vdisplay == pipe_config->pipe_src_h)
265 switch (fitting_mode) {
266 case DRM_MODE_SCALE_CENTER:
268 * For centered modes, we have to calculate border widths &
269 * heights and modify the values programmed into the CRTC.
271 centre_horizontally(adjusted_mode, pipe_config->pipe_src_w);
272 centre_vertically(adjusted_mode, pipe_config->pipe_src_h);
273 border = LVDS_BORDER_ENABLE;
275 case DRM_MODE_SCALE_ASPECT:
276 /* Scale but preserve the aspect ratio */
277 if (INTEL_INFO(dev)->gen >= 4)
278 i965_scale_aspect(pipe_config, &pfit_control);
280 i9xx_scale_aspect(pipe_config, &pfit_control,
281 &pfit_pgm_ratios, &border);
283 case DRM_MODE_SCALE_FULLSCREEN:
285 * Full scaling, even if it changes the aspect ratio.
286 * Fortunately this is all done for us in hw.
288 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay ||
289 pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
290 pfit_control |= PFIT_ENABLE;
291 if (INTEL_INFO(dev)->gen >= 4)
292 pfit_control |= PFIT_SCALING_AUTO;
294 pfit_control |= (VERT_AUTO_SCALE |
295 VERT_INTERP_BILINEAR |
297 HORIZ_INTERP_BILINEAR);
301 WARN(1, "bad panel fit mode: %d\n", fitting_mode);
305 /* 965+ wants fuzzy fitting */
306 /* FIXME: handle multiple panels by failing gracefully */
307 if (INTEL_INFO(dev)->gen >= 4)
308 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
312 if ((pfit_control & PFIT_ENABLE) == 0) {
317 /* Make sure pre-965 set dither correctly for 18bpp panels. */
318 if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18)
319 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
321 pipe_config->gmch_pfit.control = pfit_control;
322 pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios;
323 pipe_config->gmch_pfit.lvds_border_bits = border;
326 static u32 intel_panel_compute_brightness(struct intel_connector *connector,
329 struct drm_device *dev = connector->base.dev;
330 struct drm_i915_private *dev_priv = dev->dev_private;
331 struct intel_panel *panel = &connector->panel;
333 WARN_ON(panel->backlight.max == 0);
335 if (i915.invert_brightness < 0)
338 if (i915.invert_brightness > 0 ||
339 dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) {
340 return panel->backlight.max - val;
346 static u32 bdw_get_backlight(struct intel_connector *connector)
348 struct drm_device *dev = connector->base.dev;
349 struct drm_i915_private *dev_priv = dev->dev_private;
351 return I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK;
354 static u32 pch_get_backlight(struct intel_connector *connector)
356 struct drm_device *dev = connector->base.dev;
357 struct drm_i915_private *dev_priv = dev->dev_private;
359 return I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
362 static u32 i9xx_get_backlight(struct intel_connector *connector)
364 struct drm_device *dev = connector->base.dev;
365 struct drm_i915_private *dev_priv = dev->dev_private;
366 struct intel_panel *panel = &connector->panel;
369 val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
370 if (INTEL_INFO(dev)->gen < 4)
373 if (panel->backlight.combination_mode) {
376 pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc);
383 static u32 _vlv_get_backlight(struct drm_device *dev, enum pipe pipe)
385 struct drm_i915_private *dev_priv = dev->dev_private;
387 return I915_READ(VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK;
390 static u32 vlv_get_backlight(struct intel_connector *connector)
392 struct drm_device *dev = connector->base.dev;
393 enum pipe pipe = intel_get_pipe_from_connector(connector);
395 return _vlv_get_backlight(dev, pipe);
398 static u32 intel_panel_get_backlight(struct intel_connector *connector)
400 struct drm_device *dev = connector->base.dev;
401 struct drm_i915_private *dev_priv = dev->dev_private;
405 spin_lock_irqsave(&dev_priv->backlight_lock, flags);
407 val = dev_priv->display.get_backlight(connector);
408 val = intel_panel_compute_brightness(connector, val);
410 spin_unlock_irqrestore(&dev_priv->backlight_lock, flags);
412 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
416 static void bdw_set_backlight(struct intel_connector *connector, u32 level)
418 struct drm_device *dev = connector->base.dev;
419 struct drm_i915_private *dev_priv = dev->dev_private;
420 u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK;
421 I915_WRITE(BLC_PWM_PCH_CTL2, val | level);
424 static void pch_set_backlight(struct intel_connector *connector, u32 level)
426 struct drm_device *dev = connector->base.dev;
427 struct drm_i915_private *dev_priv = dev->dev_private;
430 tmp = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
431 I915_WRITE(BLC_PWM_CPU_CTL, tmp | level);
434 static void i9xx_set_backlight(struct intel_connector *connector, u32 level)
436 struct drm_device *dev = connector->base.dev;
437 struct drm_i915_private *dev_priv = dev->dev_private;
438 struct intel_panel *panel = &connector->panel;
441 WARN_ON(panel->backlight.max == 0);
443 if (panel->backlight.combination_mode) {
446 lbpc = level * 0xfe / panel->backlight.max + 1;
448 pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
452 mask = BACKLIGHT_DUTY_CYCLE_MASK;
455 mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV;
458 tmp = I915_READ(BLC_PWM_CTL) & ~mask;
459 I915_WRITE(BLC_PWM_CTL, tmp | level);
462 static void vlv_set_backlight(struct intel_connector *connector, u32 level)
464 struct drm_device *dev = connector->base.dev;
465 struct drm_i915_private *dev_priv = dev->dev_private;
466 enum pipe pipe = intel_get_pipe_from_connector(connector);
469 tmp = I915_READ(VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK;
470 I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level);
474 intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level)
476 struct drm_device *dev = connector->base.dev;
477 struct drm_i915_private *dev_priv = dev->dev_private;
479 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
481 level = intel_panel_compute_brightness(connector, level);
482 dev_priv->display.set_backlight(connector, level);
485 /* set backlight brightness to level in range [0..max] */
486 void intel_panel_set_backlight(struct intel_connector *connector, u32 level,
489 struct drm_device *dev = connector->base.dev;
490 struct drm_i915_private *dev_priv = dev->dev_private;
491 struct intel_panel *panel = &connector->panel;
492 enum pipe pipe = intel_get_pipe_from_connector(connector);
496 if (!panel->backlight.present || pipe == INVALID_PIPE)
499 spin_lock_irqsave(&dev_priv->backlight_lock, flags);
501 WARN_ON(panel->backlight.max == 0);
503 /* scale to hardware max, but be careful to not overflow */
504 freq = panel->backlight.max;
506 level = level * freq / max;
508 level = freq / max * level;
510 panel->backlight.level = level;
511 if (panel->backlight.device)
512 panel->backlight.device->props.brightness = level;
514 if (panel->backlight.enabled)
515 intel_panel_actually_set_backlight(connector, level);
517 spin_unlock_irqrestore(&dev_priv->backlight_lock, flags);
520 static void pch_disable_backlight(struct intel_connector *connector)
522 struct drm_device *dev = connector->base.dev;
523 struct drm_i915_private *dev_priv = dev->dev_private;
526 intel_panel_actually_set_backlight(connector, 0);
528 tmp = I915_READ(BLC_PWM_CPU_CTL2);
529 I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE);
531 tmp = I915_READ(BLC_PWM_PCH_CTL1);
532 I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE);
535 static void i9xx_disable_backlight(struct intel_connector *connector)
537 intel_panel_actually_set_backlight(connector, 0);
540 static void i965_disable_backlight(struct intel_connector *connector)
542 struct drm_device *dev = connector->base.dev;
543 struct drm_i915_private *dev_priv = dev->dev_private;
546 intel_panel_actually_set_backlight(connector, 0);
548 tmp = I915_READ(BLC_PWM_CTL2);
549 I915_WRITE(BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE);
552 static void vlv_disable_backlight(struct intel_connector *connector)
554 struct drm_device *dev = connector->base.dev;
555 struct drm_i915_private *dev_priv = dev->dev_private;
556 enum pipe pipe = intel_get_pipe_from_connector(connector);
559 intel_panel_actually_set_backlight(connector, 0);
561 tmp = I915_READ(VLV_BLC_PWM_CTL2(pipe));
562 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE);
565 void intel_panel_disable_backlight(struct intel_connector *connector)
567 struct drm_device *dev = connector->base.dev;
568 struct drm_i915_private *dev_priv = dev->dev_private;
569 struct intel_panel *panel = &connector->panel;
570 enum pipe pipe = intel_get_pipe_from_connector(connector);
573 if (!panel->backlight.present || pipe == INVALID_PIPE)
577 * Do not disable backlight on the vgaswitcheroo path. When switching
578 * away from i915, the other client may depend on i915 to handle the
579 * backlight. This will leave the backlight on unnecessarily when
580 * another client is not activated.
582 if (dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) {
583 DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n");
587 spin_lock_irqsave(&dev_priv->backlight_lock, flags);
589 panel->backlight.enabled = false;
590 dev_priv->display.disable_backlight(connector);
592 spin_unlock_irqrestore(&dev_priv->backlight_lock, flags);
595 static void bdw_enable_backlight(struct intel_connector *connector)
597 struct drm_device *dev = connector->base.dev;
598 struct drm_i915_private *dev_priv = dev->dev_private;
599 struct intel_panel *panel = &connector->panel;
600 u32 pch_ctl1, pch_ctl2;
602 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
603 if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
604 DRM_DEBUG_KMS("pch backlight already enabled\n");
605 pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
606 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
609 pch_ctl2 = panel->backlight.max << 16;
610 I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
613 if (panel->backlight.active_low_pwm)
614 pch_ctl1 |= BLM_PCH_POLARITY;
616 /* BDW always uses the pch pwm controls. */
617 pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE;
619 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
620 POSTING_READ(BLC_PWM_PCH_CTL1);
621 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
623 /* This won't stick until the above enable. */
624 intel_panel_actually_set_backlight(connector, panel->backlight.level);
627 static void pch_enable_backlight(struct intel_connector *connector)
629 struct drm_device *dev = connector->base.dev;
630 struct drm_i915_private *dev_priv = dev->dev_private;
631 struct intel_panel *panel = &connector->panel;
632 enum pipe pipe = intel_get_pipe_from_connector(connector);
633 enum transcoder cpu_transcoder =
634 intel_pipe_to_cpu_transcoder(dev_priv, pipe);
635 u32 cpu_ctl2, pch_ctl1, pch_ctl2;
637 cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
638 if (cpu_ctl2 & BLM_PWM_ENABLE) {
639 WARN(1, "cpu backlight already enabled\n");
640 cpu_ctl2 &= ~BLM_PWM_ENABLE;
641 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
644 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
645 if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
646 DRM_DEBUG_KMS("pch backlight already enabled\n");
647 pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
648 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
651 if (cpu_transcoder == TRANSCODER_EDP)
652 cpu_ctl2 = BLM_TRANSCODER_EDP;
654 cpu_ctl2 = BLM_PIPE(cpu_transcoder);
655 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
656 POSTING_READ(BLC_PWM_CPU_CTL2);
657 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE);
659 /* This won't stick until the above enable. */
660 intel_panel_actually_set_backlight(connector, panel->backlight.level);
662 pch_ctl2 = panel->backlight.max << 16;
663 I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
666 if (panel->backlight.active_low_pwm)
667 pch_ctl1 |= BLM_PCH_POLARITY;
669 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
670 POSTING_READ(BLC_PWM_PCH_CTL1);
671 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
674 static void i9xx_enable_backlight(struct intel_connector *connector)
676 struct drm_device *dev = connector->base.dev;
677 struct drm_i915_private *dev_priv = dev->dev_private;
678 struct intel_panel *panel = &connector->panel;
681 ctl = I915_READ(BLC_PWM_CTL);
682 if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) {
683 WARN(1, "backlight already enabled\n");
684 I915_WRITE(BLC_PWM_CTL, 0);
687 freq = panel->backlight.max;
688 if (panel->backlight.combination_mode)
692 if (panel->backlight.combination_mode)
693 ctl |= BLM_LEGACY_MODE;
694 if (IS_PINEVIEW(dev) && panel->backlight.active_low_pwm)
695 ctl |= BLM_POLARITY_PNV;
697 I915_WRITE(BLC_PWM_CTL, ctl);
698 POSTING_READ(BLC_PWM_CTL);
700 /* XXX: combine this into above write? */
701 intel_panel_actually_set_backlight(connector, panel->backlight.level);
704 static void i965_enable_backlight(struct intel_connector *connector)
706 struct drm_device *dev = connector->base.dev;
707 struct drm_i915_private *dev_priv = dev->dev_private;
708 struct intel_panel *panel = &connector->panel;
709 enum pipe pipe = intel_get_pipe_from_connector(connector);
712 ctl2 = I915_READ(BLC_PWM_CTL2);
713 if (ctl2 & BLM_PWM_ENABLE) {
714 WARN(1, "backlight already enabled\n");
715 ctl2 &= ~BLM_PWM_ENABLE;
716 I915_WRITE(BLC_PWM_CTL2, ctl2);
719 freq = panel->backlight.max;
720 if (panel->backlight.combination_mode)
724 I915_WRITE(BLC_PWM_CTL, ctl);
726 /* XXX: combine this into above write? */
727 intel_panel_actually_set_backlight(connector, panel->backlight.level);
729 ctl2 = BLM_PIPE(pipe);
730 if (panel->backlight.combination_mode)
731 ctl2 |= BLM_COMBINATION_MODE;
732 if (panel->backlight.active_low_pwm)
733 ctl2 |= BLM_POLARITY_I965;
734 I915_WRITE(BLC_PWM_CTL2, ctl2);
735 POSTING_READ(BLC_PWM_CTL2);
736 I915_WRITE(BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE);
739 static void vlv_enable_backlight(struct intel_connector *connector)
741 struct drm_device *dev = connector->base.dev;
742 struct drm_i915_private *dev_priv = dev->dev_private;
743 struct intel_panel *panel = &connector->panel;
744 enum pipe pipe = intel_get_pipe_from_connector(connector);
747 ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe));
748 if (ctl2 & BLM_PWM_ENABLE) {
749 WARN(1, "backlight already enabled\n");
750 ctl2 &= ~BLM_PWM_ENABLE;
751 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
754 ctl = panel->backlight.max << 16;
755 I915_WRITE(VLV_BLC_PWM_CTL(pipe), ctl);
757 /* XXX: combine this into above write? */
758 intel_panel_actually_set_backlight(connector, panel->backlight.level);
761 if (panel->backlight.active_low_pwm)
762 ctl2 |= BLM_POLARITY_I965;
763 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
764 POSTING_READ(VLV_BLC_PWM_CTL2(pipe));
765 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE);
768 void intel_panel_enable_backlight(struct intel_connector *connector)
770 struct drm_device *dev = connector->base.dev;
771 struct drm_i915_private *dev_priv = dev->dev_private;
772 struct intel_panel *panel = &connector->panel;
773 enum pipe pipe = intel_get_pipe_from_connector(connector);
776 if (!panel->backlight.present || pipe == INVALID_PIPE)
779 DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));
781 spin_lock_irqsave(&dev_priv->backlight_lock, flags);
783 WARN_ON(panel->backlight.max == 0);
785 if (panel->backlight.level == 0) {
786 panel->backlight.level = panel->backlight.max;
787 if (panel->backlight.device)
788 panel->backlight.device->props.brightness =
789 panel->backlight.level;
792 dev_priv->display.enable_backlight(connector);
793 panel->backlight.enabled = true;
795 spin_unlock_irqrestore(&dev_priv->backlight_lock, flags);
798 enum drm_connector_status
799 intel_panel_detect(struct drm_device *dev)
801 struct drm_i915_private *dev_priv = dev->dev_private;
803 /* Assume that the BIOS does not lie through the OpRegion... */
804 if (!i915.panel_ignore_lid && dev_priv->opregion.lid_state) {
805 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
806 connector_status_connected :
807 connector_status_disconnected;
810 switch (i915.panel_ignore_lid) {
812 return connector_status_connected;
814 return connector_status_disconnected;
816 return connector_status_unknown;
820 #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
821 static int intel_backlight_device_update_status(struct backlight_device *bd)
823 struct intel_connector *connector = bl_get_data(bd);
824 struct drm_device *dev = connector->base.dev;
826 mutex_lock(&dev->mode_config.mutex);
827 DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n",
828 bd->props.brightness, bd->props.max_brightness);
829 intel_panel_set_backlight(connector, bd->props.brightness,
830 bd->props.max_brightness);
831 mutex_unlock(&dev->mode_config.mutex);
835 static int intel_backlight_device_get_brightness(struct backlight_device *bd)
837 struct intel_connector *connector = bl_get_data(bd);
838 struct drm_device *dev = connector->base.dev;
839 struct drm_i915_private *dev_priv = dev->dev_private;
842 intel_runtime_pm_get(dev_priv);
843 mutex_lock(&dev->mode_config.mutex);
844 ret = intel_panel_get_backlight(connector);
845 mutex_unlock(&dev->mode_config.mutex);
846 intel_runtime_pm_put(dev_priv);
851 static const struct backlight_ops intel_backlight_device_ops = {
852 .update_status = intel_backlight_device_update_status,
853 .get_brightness = intel_backlight_device_get_brightness,
856 static int intel_backlight_device_register(struct intel_connector *connector)
858 struct intel_panel *panel = &connector->panel;
859 struct backlight_properties props;
861 if (WARN_ON(panel->backlight.device))
864 BUG_ON(panel->backlight.max == 0);
866 memset(&props, 0, sizeof(props));
867 props.type = BACKLIGHT_RAW;
868 props.brightness = panel->backlight.level;
869 props.max_brightness = panel->backlight.max;
872 * Note: using the same name independent of the connector prevents
873 * registration of multiple backlight devices in the driver.
875 panel->backlight.device =
876 backlight_device_register("intel_backlight",
877 connector->base.kdev,
879 &intel_backlight_device_ops, &props);
881 if (IS_ERR(panel->backlight.device)) {
882 DRM_ERROR("Failed to register backlight: %ld\n",
883 PTR_ERR(panel->backlight.device));
884 panel->backlight.device = NULL;
890 static void intel_backlight_device_unregister(struct intel_connector *connector)
892 struct intel_panel *panel = &connector->panel;
894 if (panel->backlight.device) {
895 backlight_device_unregister(panel->backlight.device);
896 panel->backlight.device = NULL;
899 #else /* CONFIG_BACKLIGHT_CLASS_DEVICE */
900 static int intel_backlight_device_register(struct intel_connector *connector)
904 static void intel_backlight_device_unregister(struct intel_connector *connector)
907 #endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */
910 * Note: The setup hooks can't assume pipe is set!
912 * XXX: Query mode clock or hardware clock and program PWM modulation frequency
913 * appropriately when it's 0. Use VBT and/or sane defaults.
915 static int bdw_setup_backlight(struct intel_connector *connector)
917 struct drm_device *dev = connector->base.dev;
918 struct drm_i915_private *dev_priv = dev->dev_private;
919 struct intel_panel *panel = &connector->panel;
920 u32 pch_ctl1, pch_ctl2, val;
922 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
923 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;
925 pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
926 panel->backlight.max = pch_ctl2 >> 16;
927 if (!panel->backlight.max)
930 val = bdw_get_backlight(connector);
931 panel->backlight.level = intel_panel_compute_brightness(connector, val);
933 panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) &&
934 panel->backlight.level != 0;
939 static int pch_setup_backlight(struct intel_connector *connector)
941 struct drm_device *dev = connector->base.dev;
942 struct drm_i915_private *dev_priv = dev->dev_private;
943 struct intel_panel *panel = &connector->panel;
944 u32 cpu_ctl2, pch_ctl1, pch_ctl2, val;
946 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
947 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;
949 pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
950 panel->backlight.max = pch_ctl2 >> 16;
951 if (!panel->backlight.max)
954 val = pch_get_backlight(connector);
955 panel->backlight.level = intel_panel_compute_brightness(connector, val);
957 cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
958 panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) &&
959 (pch_ctl1 & BLM_PCH_PWM_ENABLE) && panel->backlight.level != 0;
964 static int i9xx_setup_backlight(struct intel_connector *connector)
966 struct drm_device *dev = connector->base.dev;
967 struct drm_i915_private *dev_priv = dev->dev_private;
968 struct intel_panel *panel = &connector->panel;
971 ctl = I915_READ(BLC_PWM_CTL);
973 if (IS_GEN2(dev) || IS_I915GM(dev) || IS_I945GM(dev))
974 panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE;
976 if (IS_PINEVIEW(dev))
977 panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV;
979 panel->backlight.max = ctl >> 17;
980 if (panel->backlight.combination_mode)
981 panel->backlight.max *= 0xff;
983 if (!panel->backlight.max)
986 val = i9xx_get_backlight(connector);
987 panel->backlight.level = intel_panel_compute_brightness(connector, val);
989 panel->backlight.enabled = panel->backlight.level != 0;
994 static int i965_setup_backlight(struct intel_connector *connector)
996 struct drm_device *dev = connector->base.dev;
997 struct drm_i915_private *dev_priv = dev->dev_private;
998 struct intel_panel *panel = &connector->panel;
1001 ctl2 = I915_READ(BLC_PWM_CTL2);
1002 panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE;
1003 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;
1005 ctl = I915_READ(BLC_PWM_CTL);
1006 panel->backlight.max = ctl >> 16;
1007 if (panel->backlight.combination_mode)
1008 panel->backlight.max *= 0xff;
1010 if (!panel->backlight.max)
1013 val = i9xx_get_backlight(connector);
1014 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1016 panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&
1017 panel->backlight.level != 0;
1022 static int vlv_setup_backlight(struct intel_connector *connector)
1024 struct drm_device *dev = connector->base.dev;
1025 struct drm_i915_private *dev_priv = dev->dev_private;
1026 struct intel_panel *panel = &connector->panel;
1030 for_each_pipe(pipe) {
1031 u32 cur_val = I915_READ(VLV_BLC_PWM_CTL(pipe));
1033 /* Skip if the modulation freq is already set */
1034 if (cur_val & ~BACKLIGHT_DUTY_CYCLE_MASK)
1037 cur_val &= BACKLIGHT_DUTY_CYCLE_MASK;
1038 I915_WRITE(VLV_BLC_PWM_CTL(pipe), (0xf42 << 16) |
1042 ctl2 = I915_READ(VLV_BLC_PWM_CTL2(PIPE_A));
1043 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;
1045 ctl = I915_READ(VLV_BLC_PWM_CTL(PIPE_A));
1046 panel->backlight.max = ctl >> 16;
1047 if (!panel->backlight.max)
1050 val = _vlv_get_backlight(dev, PIPE_A);
1051 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1053 panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&
1054 panel->backlight.level != 0;
1059 int intel_panel_setup_backlight(struct drm_connector *connector)
1061 struct drm_device *dev = connector->dev;
1062 struct drm_i915_private *dev_priv = dev->dev_private;
1063 struct intel_connector *intel_connector = to_intel_connector(connector);
1064 struct intel_panel *panel = &intel_connector->panel;
1065 unsigned long flags;
1068 /* set level and max in panel struct */
1069 spin_lock_irqsave(&dev_priv->backlight_lock, flags);
1070 ret = dev_priv->display.setup_backlight(intel_connector);
1071 spin_unlock_irqrestore(&dev_priv->backlight_lock, flags);
1074 DRM_DEBUG_KMS("failed to setup backlight for connector %s\n",
1075 drm_get_connector_name(connector));
1079 intel_backlight_device_register(intel_connector);
1081 panel->backlight.present = true;
1083 DRM_DEBUG_KMS("backlight initialized, %s, brightness %u/%u, "
1084 "sysfs interface %sregistered\n",
1085 panel->backlight.enabled ? "enabled" : "disabled",
1086 panel->backlight.level, panel->backlight.max,
1087 panel->backlight.device ? "" : "not ");
1092 void intel_panel_destroy_backlight(struct drm_connector *connector)
1094 struct intel_connector *intel_connector = to_intel_connector(connector);
1095 struct intel_panel *panel = &intel_connector->panel;
1097 panel->backlight.present = false;
1098 intel_backlight_device_unregister(intel_connector);
1102 * intel_find_panel_downclock - find the reduced downclock for LVDS in EDID
1104 * @fixed_mode : panel native mode
1105 * @connector: LVDS/eDP connector
1107 * Return downclock_avail
1108 * Find the reduced downclock for LVDS/eDP in EDID.
1110 struct drm_display_mode *
1111 intel_find_panel_downclock(struct drm_device *dev,
1112 struct drm_display_mode *fixed_mode,
1113 struct drm_connector *connector)
1115 struct drm_display_mode *scan, *tmp_mode;
1118 temp_downclock = fixed_mode->clock;
1121 list_for_each_entry(scan, &connector->probed_modes, head) {
1123 * If one mode has the same resolution with the fixed_panel
1124 * mode while they have the different refresh rate, it means
1125 * that the reduced downclock is found. In such
1126 * case we can set the different FPx0/1 to dynamically select
1127 * between low and high frequency.
1129 if (scan->hdisplay == fixed_mode->hdisplay &&
1130 scan->hsync_start == fixed_mode->hsync_start &&
1131 scan->hsync_end == fixed_mode->hsync_end &&
1132 scan->htotal == fixed_mode->htotal &&
1133 scan->vdisplay == fixed_mode->vdisplay &&
1134 scan->vsync_start == fixed_mode->vsync_start &&
1135 scan->vsync_end == fixed_mode->vsync_end &&
1136 scan->vtotal == fixed_mode->vtotal) {
1137 if (scan->clock < temp_downclock) {
1139 * The downclock is already found. But we
1140 * expect to find the lower downclock.
1142 temp_downclock = scan->clock;
1148 if (temp_downclock < fixed_mode->clock)
1149 return drm_mode_duplicate(dev, tmp_mode);
1154 /* Set up chip specific backlight functions */
1155 void intel_panel_init_backlight_funcs(struct drm_device *dev)
1157 struct drm_i915_private *dev_priv = dev->dev_private;
1159 if (IS_BROADWELL(dev)) {
1160 dev_priv->display.setup_backlight = bdw_setup_backlight;
1161 dev_priv->display.enable_backlight = bdw_enable_backlight;
1162 dev_priv->display.disable_backlight = pch_disable_backlight;
1163 dev_priv->display.set_backlight = bdw_set_backlight;
1164 dev_priv->display.get_backlight = bdw_get_backlight;
1165 } else if (HAS_PCH_SPLIT(dev)) {
1166 dev_priv->display.setup_backlight = pch_setup_backlight;
1167 dev_priv->display.enable_backlight = pch_enable_backlight;
1168 dev_priv->display.disable_backlight = pch_disable_backlight;
1169 dev_priv->display.set_backlight = pch_set_backlight;
1170 dev_priv->display.get_backlight = pch_get_backlight;
1171 } else if (IS_VALLEYVIEW(dev)) {
1172 dev_priv->display.setup_backlight = vlv_setup_backlight;
1173 dev_priv->display.enable_backlight = vlv_enable_backlight;
1174 dev_priv->display.disable_backlight = vlv_disable_backlight;
1175 dev_priv->display.set_backlight = vlv_set_backlight;
1176 dev_priv->display.get_backlight = vlv_get_backlight;
1177 } else if (IS_GEN4(dev)) {
1178 dev_priv->display.setup_backlight = i965_setup_backlight;
1179 dev_priv->display.enable_backlight = i965_enable_backlight;
1180 dev_priv->display.disable_backlight = i965_disable_backlight;
1181 dev_priv->display.set_backlight = i9xx_set_backlight;
1182 dev_priv->display.get_backlight = i9xx_get_backlight;
1184 dev_priv->display.setup_backlight = i9xx_setup_backlight;
1185 dev_priv->display.enable_backlight = i9xx_enable_backlight;
1186 dev_priv->display.disable_backlight = i9xx_disable_backlight;
1187 dev_priv->display.set_backlight = i9xx_set_backlight;
1188 dev_priv->display.get_backlight = i9xx_get_backlight;
1192 int intel_panel_init(struct intel_panel *panel,
1193 struct drm_display_mode *fixed_mode,
1194 struct drm_display_mode *downclock_mode)
1196 panel->fixed_mode = fixed_mode;
1197 panel->downclock_mode = downclock_mode;
1202 void intel_panel_fini(struct intel_panel *panel)
1204 struct intel_connector *intel_connector =
1205 container_of(panel, struct intel_connector, panel);
1207 if (panel->fixed_mode)
1208 drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);
1210 if (panel->downclock_mode)
1211 drm_mode_destroy(intel_connector->base.dev,
1212 panel->downclock_mode);