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 <linux/pwm.h>
36 #include "intel_drv.h"
38 #define CRC_PMIC_PWM_PERIOD_NS 21333
41 intel_fixed_panel_mode(const struct drm_display_mode
*fixed_mode
,
42 struct drm_display_mode
*adjusted_mode
)
44 drm_mode_copy(adjusted_mode
, fixed_mode
);
46 drm_mode_set_crtcinfo(adjusted_mode
, 0);
50 * intel_find_panel_downclock - find the reduced downclock for LVDS in EDID
51 * @dev_priv: i915 device instance
52 * @fixed_mode : panel native mode
53 * @connector: LVDS/eDP connector
55 * Return downclock_avail
56 * Find the reduced downclock for LVDS/eDP in EDID.
58 struct drm_display_mode
*
59 intel_find_panel_downclock(struct drm_i915_private
*dev_priv
,
60 struct drm_display_mode
*fixed_mode
,
61 struct drm_connector
*connector
)
63 struct drm_display_mode
*scan
, *tmp_mode
;
66 temp_downclock
= fixed_mode
->clock
;
69 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
71 * If one mode has the same resolution with the fixed_panel
72 * mode while they have the different refresh rate, it means
73 * that the reduced downclock is found. In such
74 * case we can set the different FPx0/1 to dynamically select
75 * between low and high frequency.
77 if (scan
->hdisplay
== fixed_mode
->hdisplay
&&
78 scan
->hsync_start
== fixed_mode
->hsync_start
&&
79 scan
->hsync_end
== fixed_mode
->hsync_end
&&
80 scan
->htotal
== fixed_mode
->htotal
&&
81 scan
->vdisplay
== fixed_mode
->vdisplay
&&
82 scan
->vsync_start
== fixed_mode
->vsync_start
&&
83 scan
->vsync_end
== fixed_mode
->vsync_end
&&
84 scan
->vtotal
== fixed_mode
->vtotal
) {
85 if (scan
->clock
< temp_downclock
) {
87 * The downclock is already found. But we
88 * expect to find the lower downclock.
90 temp_downclock
= scan
->clock
;
96 if (temp_downclock
< fixed_mode
->clock
)
97 return drm_mode_duplicate(&dev_priv
->drm
, tmp_mode
);
102 /* adjusted_mode has been preset to be the panel's fixed mode */
104 intel_pch_panel_fitting(struct intel_crtc
*intel_crtc
,
105 struct intel_crtc_state
*pipe_config
,
108 const struct drm_display_mode
*adjusted_mode
= &pipe_config
->base
.adjusted_mode
;
109 int x
= 0, y
= 0, width
= 0, height
= 0;
111 /* Native modes don't need fitting */
112 if (adjusted_mode
->crtc_hdisplay
== pipe_config
->pipe_src_w
&&
113 adjusted_mode
->crtc_vdisplay
== pipe_config
->pipe_src_h
)
116 switch (fitting_mode
) {
117 case DRM_MODE_SCALE_CENTER
:
118 width
= pipe_config
->pipe_src_w
;
119 height
= pipe_config
->pipe_src_h
;
120 x
= (adjusted_mode
->crtc_hdisplay
- width
+ 1)/2;
121 y
= (adjusted_mode
->crtc_vdisplay
- height
+ 1)/2;
124 case DRM_MODE_SCALE_ASPECT
:
125 /* Scale but preserve the aspect ratio */
127 u32 scaled_width
= adjusted_mode
->crtc_hdisplay
128 * pipe_config
->pipe_src_h
;
129 u32 scaled_height
= pipe_config
->pipe_src_w
130 * adjusted_mode
->crtc_vdisplay
;
131 if (scaled_width
> scaled_height
) { /* pillar */
132 width
= scaled_height
/ pipe_config
->pipe_src_h
;
135 x
= (adjusted_mode
->crtc_hdisplay
- width
+ 1) / 2;
137 height
= adjusted_mode
->crtc_vdisplay
;
138 } else if (scaled_width
< scaled_height
) { /* letter */
139 height
= scaled_width
/ pipe_config
->pipe_src_w
;
142 y
= (adjusted_mode
->crtc_vdisplay
- height
+ 1) / 2;
144 width
= adjusted_mode
->crtc_hdisplay
;
147 width
= adjusted_mode
->crtc_hdisplay
;
148 height
= adjusted_mode
->crtc_vdisplay
;
153 case DRM_MODE_SCALE_FULLSCREEN
:
155 width
= adjusted_mode
->crtc_hdisplay
;
156 height
= adjusted_mode
->crtc_vdisplay
;
160 WARN(1, "bad panel fit mode: %d\n", fitting_mode
);
165 pipe_config
->pch_pfit
.pos
= (x
<< 16) | y
;
166 pipe_config
->pch_pfit
.size
= (width
<< 16) | height
;
167 pipe_config
->pch_pfit
.enabled
= pipe_config
->pch_pfit
.size
!= 0;
171 centre_horizontally(struct drm_display_mode
*adjusted_mode
,
174 u32 border
, sync_pos
, blank_width
, sync_width
;
176 /* keep the hsync and hblank widths constant */
177 sync_width
= adjusted_mode
->crtc_hsync_end
- adjusted_mode
->crtc_hsync_start
;
178 blank_width
= adjusted_mode
->crtc_hblank_end
- adjusted_mode
->crtc_hblank_start
;
179 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
181 border
= (adjusted_mode
->crtc_hdisplay
- width
+ 1) / 2;
182 border
+= border
& 1; /* make the border even */
184 adjusted_mode
->crtc_hdisplay
= width
;
185 adjusted_mode
->crtc_hblank_start
= width
+ border
;
186 adjusted_mode
->crtc_hblank_end
= adjusted_mode
->crtc_hblank_start
+ blank_width
;
188 adjusted_mode
->crtc_hsync_start
= adjusted_mode
->crtc_hblank_start
+ sync_pos
;
189 adjusted_mode
->crtc_hsync_end
= adjusted_mode
->crtc_hsync_start
+ sync_width
;
193 centre_vertically(struct drm_display_mode
*adjusted_mode
,
196 u32 border
, sync_pos
, blank_width
, sync_width
;
198 /* keep the vsync and vblank widths constant */
199 sync_width
= adjusted_mode
->crtc_vsync_end
- adjusted_mode
->crtc_vsync_start
;
200 blank_width
= adjusted_mode
->crtc_vblank_end
- adjusted_mode
->crtc_vblank_start
;
201 sync_pos
= (blank_width
- sync_width
+ 1) / 2;
203 border
= (adjusted_mode
->crtc_vdisplay
- height
+ 1) / 2;
205 adjusted_mode
->crtc_vdisplay
= height
;
206 adjusted_mode
->crtc_vblank_start
= height
+ border
;
207 adjusted_mode
->crtc_vblank_end
= adjusted_mode
->crtc_vblank_start
+ blank_width
;
209 adjusted_mode
->crtc_vsync_start
= adjusted_mode
->crtc_vblank_start
+ sync_pos
;
210 adjusted_mode
->crtc_vsync_end
= adjusted_mode
->crtc_vsync_start
+ sync_width
;
213 static inline u32
panel_fitter_scaling(u32 source
, u32 target
)
216 * Floating point operation is not supported. So the FACTOR
217 * is defined, which can avoid the floating point computation
218 * when calculating the panel ratio.
221 #define FACTOR (1 << ACCURACY)
222 u32 ratio
= source
* FACTOR
/ target
;
223 return (FACTOR
* ratio
+ FACTOR
/2) / FACTOR
;
226 static void i965_scale_aspect(struct intel_crtc_state
*pipe_config
,
229 const struct drm_display_mode
*adjusted_mode
= &pipe_config
->base
.adjusted_mode
;
230 u32 scaled_width
= adjusted_mode
->crtc_hdisplay
*
231 pipe_config
->pipe_src_h
;
232 u32 scaled_height
= pipe_config
->pipe_src_w
*
233 adjusted_mode
->crtc_vdisplay
;
235 /* 965+ is easy, it does everything in hw */
236 if (scaled_width
> scaled_height
)
237 *pfit_control
|= PFIT_ENABLE
|
239 else if (scaled_width
< scaled_height
)
240 *pfit_control
|= PFIT_ENABLE
|
242 else if (adjusted_mode
->crtc_hdisplay
!= pipe_config
->pipe_src_w
)
243 *pfit_control
|= PFIT_ENABLE
| PFIT_SCALING_AUTO
;
246 static void i9xx_scale_aspect(struct intel_crtc_state
*pipe_config
,
247 u32
*pfit_control
, u32
*pfit_pgm_ratios
,
250 struct drm_display_mode
*adjusted_mode
= &pipe_config
->base
.adjusted_mode
;
251 u32 scaled_width
= adjusted_mode
->crtc_hdisplay
*
252 pipe_config
->pipe_src_h
;
253 u32 scaled_height
= pipe_config
->pipe_src_w
*
254 adjusted_mode
->crtc_vdisplay
;
258 * For earlier chips we have to calculate the scaling
259 * ratio by hand and program it into the
260 * PFIT_PGM_RATIO register
262 if (scaled_width
> scaled_height
) { /* pillar */
263 centre_horizontally(adjusted_mode
,
265 pipe_config
->pipe_src_h
);
267 *border
= LVDS_BORDER_ENABLE
;
268 if (pipe_config
->pipe_src_h
!= adjusted_mode
->crtc_vdisplay
) {
269 bits
= panel_fitter_scaling(pipe_config
->pipe_src_h
,
270 adjusted_mode
->crtc_vdisplay
);
272 *pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
273 bits
<< PFIT_VERT_SCALE_SHIFT
);
274 *pfit_control
|= (PFIT_ENABLE
|
275 VERT_INTERP_BILINEAR
|
276 HORIZ_INTERP_BILINEAR
);
278 } else if (scaled_width
< scaled_height
) { /* letter */
279 centre_vertically(adjusted_mode
,
281 pipe_config
->pipe_src_w
);
283 *border
= LVDS_BORDER_ENABLE
;
284 if (pipe_config
->pipe_src_w
!= adjusted_mode
->crtc_hdisplay
) {
285 bits
= panel_fitter_scaling(pipe_config
->pipe_src_w
,
286 adjusted_mode
->crtc_hdisplay
);
288 *pfit_pgm_ratios
|= (bits
<< PFIT_HORIZ_SCALE_SHIFT
|
289 bits
<< PFIT_VERT_SCALE_SHIFT
);
290 *pfit_control
|= (PFIT_ENABLE
|
291 VERT_INTERP_BILINEAR
|
292 HORIZ_INTERP_BILINEAR
);
295 /* Aspects match, Let hw scale both directions */
296 *pfit_control
|= (PFIT_ENABLE
|
297 VERT_AUTO_SCALE
| HORIZ_AUTO_SCALE
|
298 VERT_INTERP_BILINEAR
|
299 HORIZ_INTERP_BILINEAR
);
303 void intel_gmch_panel_fitting(struct intel_crtc
*intel_crtc
,
304 struct intel_crtc_state
*pipe_config
,
307 struct drm_i915_private
*dev_priv
= to_i915(intel_crtc
->base
.dev
);
308 u32 pfit_control
= 0, pfit_pgm_ratios
= 0, border
= 0;
309 struct drm_display_mode
*adjusted_mode
= &pipe_config
->base
.adjusted_mode
;
311 /* Native modes don't need fitting */
312 if (adjusted_mode
->crtc_hdisplay
== pipe_config
->pipe_src_w
&&
313 adjusted_mode
->crtc_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_GEN(dev_priv
) >= 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
->crtc_vdisplay
||
340 pipe_config
->pipe_src_w
!= adjusted_mode
->crtc_hdisplay
) {
341 pfit_control
|= PFIT_ENABLE
;
342 if (INTEL_GEN(dev_priv
) >= 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_GEN(dev_priv
) >= 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_GEN(dev_priv
) < 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_i915_private
*dev_priv
)
380 /* Assume that the BIOS does not lie through the OpRegion... */
381 if (!i915
.panel_ignore_lid
&& dev_priv
->opregion
.lid_state
) {
382 return *dev_priv
->opregion
.lid_state
& 0x1 ?
383 connector_status_connected
:
384 connector_status_disconnected
;
387 switch (i915
.panel_ignore_lid
) {
389 return connector_status_connected
;
391 return connector_status_disconnected
;
393 return connector_status_unknown
;
398 * scale - scale values from one range to another
400 * @source_val: value in range [@source_min..@source_max]
402 * Return @source_val in range [@source_min..@source_max] scaled to range
403 * [@target_min..@target_max].
405 static uint32_t scale(uint32_t source_val
,
406 uint32_t source_min
, uint32_t source_max
,
407 uint32_t target_min
, uint32_t target_max
)
411 WARN_ON(source_min
> source_max
);
412 WARN_ON(target_min
> target_max
);
415 source_val
= clamp(source_val
, source_min
, source_max
);
417 /* avoid overflows */
418 target_val
= DIV_ROUND_CLOSEST_ULL((uint64_t)(source_val
- source_min
) *
419 (target_max
- target_min
), source_max
- source_min
);
420 target_val
+= target_min
;
425 /* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */
426 static inline u32
scale_user_to_hw(struct intel_connector
*connector
,
427 u32 user_level
, u32 user_max
)
429 struct intel_panel
*panel
= &connector
->panel
;
431 return scale(user_level
, 0, user_max
,
432 panel
->backlight
.min
, panel
->backlight
.max
);
435 /* Scale user_level in range [0..user_max] to [0..hw_max], clamping the result
436 * to [hw_min..hw_max]. */
437 static inline u32
clamp_user_to_hw(struct intel_connector
*connector
,
438 u32 user_level
, u32 user_max
)
440 struct intel_panel
*panel
= &connector
->panel
;
443 hw_level
= scale(user_level
, 0, user_max
, 0, panel
->backlight
.max
);
444 hw_level
= clamp(hw_level
, panel
->backlight
.min
, panel
->backlight
.max
);
449 /* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */
450 static inline u32
scale_hw_to_user(struct intel_connector
*connector
,
451 u32 hw_level
, u32 user_max
)
453 struct intel_panel
*panel
= &connector
->panel
;
455 return scale(hw_level
, panel
->backlight
.min
, panel
->backlight
.max
,
459 static u32
intel_panel_compute_brightness(struct intel_connector
*connector
,
462 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
463 struct intel_panel
*panel
= &connector
->panel
;
465 WARN_ON(panel
->backlight
.max
== 0);
467 if (i915
.invert_brightness
< 0)
470 if (i915
.invert_brightness
> 0 ||
471 dev_priv
->quirks
& QUIRK_INVERT_BRIGHTNESS
) {
472 return panel
->backlight
.max
- val
;
478 static u32
lpt_get_backlight(struct intel_connector
*connector
)
480 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
482 return I915_READ(BLC_PWM_PCH_CTL2
) & BACKLIGHT_DUTY_CYCLE_MASK
;
485 static u32
pch_get_backlight(struct intel_connector
*connector
)
487 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
489 return I915_READ(BLC_PWM_CPU_CTL
) & BACKLIGHT_DUTY_CYCLE_MASK
;
492 static u32
i9xx_get_backlight(struct intel_connector
*connector
)
494 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
495 struct intel_panel
*panel
= &connector
->panel
;
498 val
= I915_READ(BLC_PWM_CTL
) & BACKLIGHT_DUTY_CYCLE_MASK
;
499 if (INTEL_INFO(dev_priv
)->gen
< 4)
502 if (panel
->backlight
.combination_mode
) {
505 pci_read_config_byte(dev_priv
->drm
.pdev
, LBPC
, &lbpc
);
512 static u32
_vlv_get_backlight(struct drm_i915_private
*dev_priv
, enum pipe pipe
)
514 if (WARN_ON(pipe
!= PIPE_A
&& pipe
!= PIPE_B
))
517 return I915_READ(VLV_BLC_PWM_CTL(pipe
)) & BACKLIGHT_DUTY_CYCLE_MASK
;
520 static u32
vlv_get_backlight(struct intel_connector
*connector
)
522 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
523 enum pipe pipe
= intel_get_pipe_from_connector(connector
);
525 return _vlv_get_backlight(dev_priv
, pipe
);
528 static u32
bxt_get_backlight(struct intel_connector
*connector
)
530 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
531 struct intel_panel
*panel
= &connector
->panel
;
533 return I915_READ(BXT_BLC_PWM_DUTY(panel
->backlight
.controller
));
536 static u32
pwm_get_backlight(struct intel_connector
*connector
)
538 struct intel_panel
*panel
= &connector
->panel
;
541 duty_ns
= pwm_get_duty_cycle(panel
->backlight
.pwm
);
542 return DIV_ROUND_UP(duty_ns
* 100, CRC_PMIC_PWM_PERIOD_NS
);
545 static u32
intel_panel_get_backlight(struct intel_connector
*connector
)
547 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
548 struct intel_panel
*panel
= &connector
->panel
;
551 mutex_lock(&dev_priv
->backlight_lock
);
553 if (panel
->backlight
.enabled
) {
554 val
= panel
->backlight
.get(connector
);
555 val
= intel_panel_compute_brightness(connector
, val
);
558 mutex_unlock(&dev_priv
->backlight_lock
);
560 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val
);
564 static void lpt_set_backlight(const struct drm_connector_state
*conn_state
, u32 level
)
566 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
567 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
569 u32 val
= I915_READ(BLC_PWM_PCH_CTL2
) & ~BACKLIGHT_DUTY_CYCLE_MASK
;
570 I915_WRITE(BLC_PWM_PCH_CTL2
, val
| level
);
573 static void pch_set_backlight(const struct drm_connector_state
*conn_state
, u32 level
)
575 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
576 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
579 tmp
= I915_READ(BLC_PWM_CPU_CTL
) & ~BACKLIGHT_DUTY_CYCLE_MASK
;
580 I915_WRITE(BLC_PWM_CPU_CTL
, tmp
| level
);
583 static void i9xx_set_backlight(const struct drm_connector_state
*conn_state
, u32 level
)
585 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
586 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
587 struct intel_panel
*panel
= &connector
->panel
;
590 WARN_ON(panel
->backlight
.max
== 0);
592 if (panel
->backlight
.combination_mode
) {
595 lbpc
= level
* 0xfe / panel
->backlight
.max
+ 1;
597 pci_write_config_byte(dev_priv
->drm
.pdev
, LBPC
, lbpc
);
600 if (IS_GEN4(dev_priv
)) {
601 mask
= BACKLIGHT_DUTY_CYCLE_MASK
;
604 mask
= BACKLIGHT_DUTY_CYCLE_MASK_PNV
;
607 tmp
= I915_READ(BLC_PWM_CTL
) & ~mask
;
608 I915_WRITE(BLC_PWM_CTL
, tmp
| level
);
611 static void vlv_set_backlight(const struct drm_connector_state
*conn_state
, u32 level
)
613 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
614 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
615 enum pipe pipe
= to_intel_crtc(conn_state
->crtc
)->pipe
;
618 tmp
= I915_READ(VLV_BLC_PWM_CTL(pipe
)) & ~BACKLIGHT_DUTY_CYCLE_MASK
;
619 I915_WRITE(VLV_BLC_PWM_CTL(pipe
), tmp
| level
);
622 static void bxt_set_backlight(const struct drm_connector_state
*conn_state
, u32 level
)
624 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
625 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
626 struct intel_panel
*panel
= &connector
->panel
;
628 I915_WRITE(BXT_BLC_PWM_DUTY(panel
->backlight
.controller
), level
);
631 static void pwm_set_backlight(const struct drm_connector_state
*conn_state
, u32 level
)
633 struct intel_panel
*panel
= &to_intel_connector(conn_state
->connector
)->panel
;
634 int duty_ns
= DIV_ROUND_UP(level
* CRC_PMIC_PWM_PERIOD_NS
, 100);
636 pwm_config(panel
->backlight
.pwm
, duty_ns
, CRC_PMIC_PWM_PERIOD_NS
);
640 intel_panel_actually_set_backlight(const struct drm_connector_state
*conn_state
, u32 level
)
642 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
643 struct intel_panel
*panel
= &connector
->panel
;
645 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level
);
647 level
= intel_panel_compute_brightness(connector
, level
);
648 panel
->backlight
.set(conn_state
, level
);
651 /* set backlight brightness to level in range [0..max], scaling wrt hw min */
652 static void intel_panel_set_backlight(const struct drm_connector_state
*conn_state
,
653 u32 user_level
, u32 user_max
)
655 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
656 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
657 struct intel_panel
*panel
= &connector
->panel
;
660 if (!panel
->backlight
.present
)
663 mutex_lock(&dev_priv
->backlight_lock
);
665 WARN_ON(panel
->backlight
.max
== 0);
667 hw_level
= scale_user_to_hw(connector
, user_level
, user_max
);
668 panel
->backlight
.level
= hw_level
;
670 if (panel
->backlight
.enabled
)
671 intel_panel_actually_set_backlight(conn_state
, hw_level
);
673 mutex_unlock(&dev_priv
->backlight_lock
);
676 /* set backlight brightness to level in range [0..max], assuming hw min is
679 void intel_panel_set_backlight_acpi(const struct drm_connector_state
*conn_state
,
680 u32 user_level
, u32 user_max
)
682 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
683 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
684 struct intel_panel
*panel
= &connector
->panel
;
688 * Lack of crtc may occur during driver init because
689 * connection_mutex isn't held across the entire backlight
690 * setup + modeset readout, and the BIOS can issue the
691 * requests at any time.
693 if (!panel
->backlight
.present
|| !conn_state
->crtc
)
696 mutex_lock(&dev_priv
->backlight_lock
);
698 WARN_ON(panel
->backlight
.max
== 0);
700 hw_level
= clamp_user_to_hw(connector
, user_level
, user_max
);
701 panel
->backlight
.level
= hw_level
;
703 if (panel
->backlight
.device
)
704 panel
->backlight
.device
->props
.brightness
=
705 scale_hw_to_user(connector
,
706 panel
->backlight
.level
,
707 panel
->backlight
.device
->props
.max_brightness
);
709 if (panel
->backlight
.enabled
)
710 intel_panel_actually_set_backlight(conn_state
, hw_level
);
712 mutex_unlock(&dev_priv
->backlight_lock
);
715 static void lpt_disable_backlight(const struct drm_connector_state
*old_conn_state
)
717 struct intel_connector
*connector
= to_intel_connector(old_conn_state
->connector
);
718 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
721 intel_panel_actually_set_backlight(old_conn_state
, 0);
724 * Although we don't support or enable CPU PWM with LPT/SPT based
725 * systems, it may have been enabled prior to loading the
726 * driver. Disable to avoid warnings on LCPLL disable.
728 * This needs rework if we need to add support for CPU PWM on PCH split
731 tmp
= I915_READ(BLC_PWM_CPU_CTL2
);
732 if (tmp
& BLM_PWM_ENABLE
) {
733 DRM_DEBUG_KMS("cpu backlight was enabled, disabling\n");
734 I915_WRITE(BLC_PWM_CPU_CTL2
, tmp
& ~BLM_PWM_ENABLE
);
737 tmp
= I915_READ(BLC_PWM_PCH_CTL1
);
738 I915_WRITE(BLC_PWM_PCH_CTL1
, tmp
& ~BLM_PCH_PWM_ENABLE
);
741 static void pch_disable_backlight(const struct drm_connector_state
*old_conn_state
)
743 struct intel_connector
*connector
= to_intel_connector(old_conn_state
->connector
);
744 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
747 intel_panel_actually_set_backlight(old_conn_state
, 0);
749 tmp
= I915_READ(BLC_PWM_CPU_CTL2
);
750 I915_WRITE(BLC_PWM_CPU_CTL2
, tmp
& ~BLM_PWM_ENABLE
);
752 tmp
= I915_READ(BLC_PWM_PCH_CTL1
);
753 I915_WRITE(BLC_PWM_PCH_CTL1
, tmp
& ~BLM_PCH_PWM_ENABLE
);
756 static void i9xx_disable_backlight(const struct drm_connector_state
*old_conn_state
)
758 intel_panel_actually_set_backlight(old_conn_state
, 0);
761 static void i965_disable_backlight(const struct drm_connector_state
*old_conn_state
)
763 struct drm_i915_private
*dev_priv
= to_i915(old_conn_state
->connector
->dev
);
766 intel_panel_actually_set_backlight(old_conn_state
, 0);
768 tmp
= I915_READ(BLC_PWM_CTL2
);
769 I915_WRITE(BLC_PWM_CTL2
, tmp
& ~BLM_PWM_ENABLE
);
772 static void vlv_disable_backlight(const struct drm_connector_state
*old_conn_state
)
774 struct intel_connector
*connector
= to_intel_connector(old_conn_state
->connector
);
775 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
776 enum pipe pipe
= to_intel_crtc(old_conn_state
->crtc
)->pipe
;
779 intel_panel_actually_set_backlight(old_conn_state
, 0);
781 tmp
= I915_READ(VLV_BLC_PWM_CTL2(pipe
));
782 I915_WRITE(VLV_BLC_PWM_CTL2(pipe
), tmp
& ~BLM_PWM_ENABLE
);
785 static void bxt_disable_backlight(const struct drm_connector_state
*old_conn_state
)
787 struct intel_connector
*connector
= to_intel_connector(old_conn_state
->connector
);
788 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
789 struct intel_panel
*panel
= &connector
->panel
;
792 intel_panel_actually_set_backlight(old_conn_state
, 0);
794 tmp
= I915_READ(BXT_BLC_PWM_CTL(panel
->backlight
.controller
));
795 I915_WRITE(BXT_BLC_PWM_CTL(panel
->backlight
.controller
),
796 tmp
& ~BXT_BLC_PWM_ENABLE
);
798 if (panel
->backlight
.controller
== 1) {
799 val
= I915_READ(UTIL_PIN_CTL
);
800 val
&= ~UTIL_PIN_ENABLE
;
801 I915_WRITE(UTIL_PIN_CTL
, val
);
805 static void cnp_disable_backlight(const struct drm_connector_state
*old_conn_state
)
807 struct intel_connector
*connector
= to_intel_connector(old_conn_state
->connector
);
808 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
809 struct intel_panel
*panel
= &connector
->panel
;
812 intel_panel_actually_set_backlight(old_conn_state
, 0);
814 tmp
= I915_READ(BXT_BLC_PWM_CTL(panel
->backlight
.controller
));
815 I915_WRITE(BXT_BLC_PWM_CTL(panel
->backlight
.controller
),
816 tmp
& ~BXT_BLC_PWM_ENABLE
);
819 static void pwm_disable_backlight(const struct drm_connector_state
*old_conn_state
)
821 struct intel_connector
*connector
= to_intel_connector(old_conn_state
->connector
);
822 struct intel_panel
*panel
= &connector
->panel
;
824 /* Disable the backlight */
825 pwm_config(panel
->backlight
.pwm
, 0, CRC_PMIC_PWM_PERIOD_NS
);
826 usleep_range(2000, 3000);
827 pwm_disable(panel
->backlight
.pwm
);
830 void intel_panel_disable_backlight(const struct drm_connector_state
*old_conn_state
)
832 struct intel_connector
*connector
= to_intel_connector(old_conn_state
->connector
);
833 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
834 struct intel_panel
*panel
= &connector
->panel
;
836 if (!panel
->backlight
.present
)
840 * Do not disable backlight on the vga_switcheroo path. When switching
841 * away from i915, the other client may depend on i915 to handle the
842 * backlight. This will leave the backlight on unnecessarily when
843 * another client is not activated.
845 if (dev_priv
->drm
.switch_power_state
== DRM_SWITCH_POWER_CHANGING
) {
846 DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n");
850 mutex_lock(&dev_priv
->backlight_lock
);
852 if (panel
->backlight
.device
)
853 panel
->backlight
.device
->props
.power
= FB_BLANK_POWERDOWN
;
854 panel
->backlight
.enabled
= false;
855 panel
->backlight
.disable(old_conn_state
);
857 mutex_unlock(&dev_priv
->backlight_lock
);
860 static void lpt_enable_backlight(const struct intel_crtc_state
*crtc_state
,
861 const struct drm_connector_state
*conn_state
)
863 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
864 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
865 struct intel_panel
*panel
= &connector
->panel
;
866 u32 pch_ctl1
, pch_ctl2
, schicken
;
868 pch_ctl1
= I915_READ(BLC_PWM_PCH_CTL1
);
869 if (pch_ctl1
& BLM_PCH_PWM_ENABLE
) {
870 DRM_DEBUG_KMS("pch backlight already enabled\n");
871 pch_ctl1
&= ~BLM_PCH_PWM_ENABLE
;
872 I915_WRITE(BLC_PWM_PCH_CTL1
, pch_ctl1
);
875 if (HAS_PCH_LPT(dev_priv
)) {
876 schicken
= I915_READ(SOUTH_CHICKEN2
);
877 if (panel
->backlight
.alternate_pwm_increment
)
878 schicken
|= LPT_PWM_GRANULARITY
;
880 schicken
&= ~LPT_PWM_GRANULARITY
;
881 I915_WRITE(SOUTH_CHICKEN2
, schicken
);
883 schicken
= I915_READ(SOUTH_CHICKEN1
);
884 if (panel
->backlight
.alternate_pwm_increment
)
885 schicken
|= SPT_PWM_GRANULARITY
;
887 schicken
&= ~SPT_PWM_GRANULARITY
;
888 I915_WRITE(SOUTH_CHICKEN1
, schicken
);
891 pch_ctl2
= panel
->backlight
.max
<< 16;
892 I915_WRITE(BLC_PWM_PCH_CTL2
, pch_ctl2
);
895 if (panel
->backlight
.active_low_pwm
)
896 pch_ctl1
|= BLM_PCH_POLARITY
;
898 /* After LPT, override is the default. */
899 if (HAS_PCH_LPT(dev_priv
))
900 pch_ctl1
|= BLM_PCH_OVERRIDE_ENABLE
;
902 I915_WRITE(BLC_PWM_PCH_CTL1
, pch_ctl1
);
903 POSTING_READ(BLC_PWM_PCH_CTL1
);
904 I915_WRITE(BLC_PWM_PCH_CTL1
, pch_ctl1
| BLM_PCH_PWM_ENABLE
);
906 /* This won't stick until the above enable. */
907 intel_panel_actually_set_backlight(conn_state
, panel
->backlight
.level
);
910 static void pch_enable_backlight(const struct intel_crtc_state
*crtc_state
,
911 const struct drm_connector_state
*conn_state
)
913 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
914 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
915 struct intel_panel
*panel
= &connector
->panel
;
916 enum transcoder cpu_transcoder
= crtc_state
->cpu_transcoder
;
917 u32 cpu_ctl2
, pch_ctl1
, pch_ctl2
;
919 cpu_ctl2
= I915_READ(BLC_PWM_CPU_CTL2
);
920 if (cpu_ctl2
& BLM_PWM_ENABLE
) {
921 DRM_DEBUG_KMS("cpu backlight already enabled\n");
922 cpu_ctl2
&= ~BLM_PWM_ENABLE
;
923 I915_WRITE(BLC_PWM_CPU_CTL2
, cpu_ctl2
);
926 pch_ctl1
= I915_READ(BLC_PWM_PCH_CTL1
);
927 if (pch_ctl1
& BLM_PCH_PWM_ENABLE
) {
928 DRM_DEBUG_KMS("pch backlight already enabled\n");
929 pch_ctl1
&= ~BLM_PCH_PWM_ENABLE
;
930 I915_WRITE(BLC_PWM_PCH_CTL1
, pch_ctl1
);
933 if (cpu_transcoder
== TRANSCODER_EDP
)
934 cpu_ctl2
= BLM_TRANSCODER_EDP
;
936 cpu_ctl2
= BLM_PIPE(cpu_transcoder
);
937 I915_WRITE(BLC_PWM_CPU_CTL2
, cpu_ctl2
);
938 POSTING_READ(BLC_PWM_CPU_CTL2
);
939 I915_WRITE(BLC_PWM_CPU_CTL2
, cpu_ctl2
| BLM_PWM_ENABLE
);
941 /* This won't stick until the above enable. */
942 intel_panel_actually_set_backlight(conn_state
, panel
->backlight
.level
);
944 pch_ctl2
= panel
->backlight
.max
<< 16;
945 I915_WRITE(BLC_PWM_PCH_CTL2
, pch_ctl2
);
948 if (panel
->backlight
.active_low_pwm
)
949 pch_ctl1
|= BLM_PCH_POLARITY
;
951 I915_WRITE(BLC_PWM_PCH_CTL1
, pch_ctl1
);
952 POSTING_READ(BLC_PWM_PCH_CTL1
);
953 I915_WRITE(BLC_PWM_PCH_CTL1
, pch_ctl1
| BLM_PCH_PWM_ENABLE
);
956 static void i9xx_enable_backlight(const struct intel_crtc_state
*crtc_state
,
957 const struct drm_connector_state
*conn_state
)
959 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
960 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
961 struct intel_panel
*panel
= &connector
->panel
;
964 ctl
= I915_READ(BLC_PWM_CTL
);
965 if (ctl
& BACKLIGHT_DUTY_CYCLE_MASK_PNV
) {
966 DRM_DEBUG_KMS("backlight already enabled\n");
967 I915_WRITE(BLC_PWM_CTL
, 0);
970 freq
= panel
->backlight
.max
;
971 if (panel
->backlight
.combination_mode
)
975 if (panel
->backlight
.combination_mode
)
976 ctl
|= BLM_LEGACY_MODE
;
977 if (IS_PINEVIEW(dev_priv
) && panel
->backlight
.active_low_pwm
)
978 ctl
|= BLM_POLARITY_PNV
;
980 I915_WRITE(BLC_PWM_CTL
, ctl
);
981 POSTING_READ(BLC_PWM_CTL
);
983 /* XXX: combine this into above write? */
984 intel_panel_actually_set_backlight(conn_state
, panel
->backlight
.level
);
987 * Needed to enable backlight on some 855gm models. BLC_HIST_CTL is
988 * 855gm only, but checking for gen2 is safe, as 855gm is the only gen2
989 * that has backlight.
991 if (IS_GEN2(dev_priv
))
992 I915_WRITE(BLC_HIST_CTL
, BLM_HISTOGRAM_ENABLE
);
995 static void i965_enable_backlight(const struct intel_crtc_state
*crtc_state
,
996 const struct drm_connector_state
*conn_state
)
998 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
999 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1000 struct intel_panel
*panel
= &connector
->panel
;
1001 enum pipe pipe
= to_intel_crtc(conn_state
->crtc
)->pipe
;
1002 u32 ctl
, ctl2
, freq
;
1004 ctl2
= I915_READ(BLC_PWM_CTL2
);
1005 if (ctl2
& BLM_PWM_ENABLE
) {
1006 DRM_DEBUG_KMS("backlight already enabled\n");
1007 ctl2
&= ~BLM_PWM_ENABLE
;
1008 I915_WRITE(BLC_PWM_CTL2
, ctl2
);
1011 freq
= panel
->backlight
.max
;
1012 if (panel
->backlight
.combination_mode
)
1016 I915_WRITE(BLC_PWM_CTL
, ctl
);
1018 ctl2
= BLM_PIPE(pipe
);
1019 if (panel
->backlight
.combination_mode
)
1020 ctl2
|= BLM_COMBINATION_MODE
;
1021 if (panel
->backlight
.active_low_pwm
)
1022 ctl2
|= BLM_POLARITY_I965
;
1023 I915_WRITE(BLC_PWM_CTL2
, ctl2
);
1024 POSTING_READ(BLC_PWM_CTL2
);
1025 I915_WRITE(BLC_PWM_CTL2
, ctl2
| BLM_PWM_ENABLE
);
1027 intel_panel_actually_set_backlight(conn_state
, panel
->backlight
.level
);
1030 static void vlv_enable_backlight(const struct intel_crtc_state
*crtc_state
,
1031 const struct drm_connector_state
*conn_state
)
1033 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
1034 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1035 struct intel_panel
*panel
= &connector
->panel
;
1036 enum pipe pipe
= to_intel_crtc(crtc_state
->base
.crtc
)->pipe
;
1039 ctl2
= I915_READ(VLV_BLC_PWM_CTL2(pipe
));
1040 if (ctl2
& BLM_PWM_ENABLE
) {
1041 DRM_DEBUG_KMS("backlight already enabled\n");
1042 ctl2
&= ~BLM_PWM_ENABLE
;
1043 I915_WRITE(VLV_BLC_PWM_CTL2(pipe
), ctl2
);
1046 ctl
= panel
->backlight
.max
<< 16;
1047 I915_WRITE(VLV_BLC_PWM_CTL(pipe
), ctl
);
1049 /* XXX: combine this into above write? */
1050 intel_panel_actually_set_backlight(conn_state
, panel
->backlight
.level
);
1053 if (panel
->backlight
.active_low_pwm
)
1054 ctl2
|= BLM_POLARITY_I965
;
1055 I915_WRITE(VLV_BLC_PWM_CTL2(pipe
), ctl2
);
1056 POSTING_READ(VLV_BLC_PWM_CTL2(pipe
));
1057 I915_WRITE(VLV_BLC_PWM_CTL2(pipe
), ctl2
| BLM_PWM_ENABLE
);
1060 static void bxt_enable_backlight(const struct intel_crtc_state
*crtc_state
,
1061 const struct drm_connector_state
*conn_state
)
1063 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
1064 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1065 struct intel_panel
*panel
= &connector
->panel
;
1066 enum pipe pipe
= to_intel_crtc(crtc_state
->base
.crtc
)->pipe
;
1069 /* Controller 1 uses the utility pin. */
1070 if (panel
->backlight
.controller
== 1) {
1071 val
= I915_READ(UTIL_PIN_CTL
);
1072 if (val
& UTIL_PIN_ENABLE
) {
1073 DRM_DEBUG_KMS("util pin already enabled\n");
1074 val
&= ~UTIL_PIN_ENABLE
;
1075 I915_WRITE(UTIL_PIN_CTL
, val
);
1079 if (panel
->backlight
.util_pin_active_low
)
1080 val
|= UTIL_PIN_POLARITY
;
1081 I915_WRITE(UTIL_PIN_CTL
, val
| UTIL_PIN_PIPE(pipe
) |
1082 UTIL_PIN_MODE_PWM
| UTIL_PIN_ENABLE
);
1085 pwm_ctl
= I915_READ(BXT_BLC_PWM_CTL(panel
->backlight
.controller
));
1086 if (pwm_ctl
& BXT_BLC_PWM_ENABLE
) {
1087 DRM_DEBUG_KMS("backlight already enabled\n");
1088 pwm_ctl
&= ~BXT_BLC_PWM_ENABLE
;
1089 I915_WRITE(BXT_BLC_PWM_CTL(panel
->backlight
.controller
),
1093 I915_WRITE(BXT_BLC_PWM_FREQ(panel
->backlight
.controller
),
1094 panel
->backlight
.max
);
1096 intel_panel_actually_set_backlight(conn_state
, panel
->backlight
.level
);
1099 if (panel
->backlight
.active_low_pwm
)
1100 pwm_ctl
|= BXT_BLC_PWM_POLARITY
;
1102 I915_WRITE(BXT_BLC_PWM_CTL(panel
->backlight
.controller
), pwm_ctl
);
1103 POSTING_READ(BXT_BLC_PWM_CTL(panel
->backlight
.controller
));
1104 I915_WRITE(BXT_BLC_PWM_CTL(panel
->backlight
.controller
),
1105 pwm_ctl
| BXT_BLC_PWM_ENABLE
);
1108 static void cnp_enable_backlight(const struct intel_crtc_state
*crtc_state
,
1109 const struct drm_connector_state
*conn_state
)
1111 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
1112 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1113 struct intel_panel
*panel
= &connector
->panel
;
1116 pwm_ctl
= I915_READ(BXT_BLC_PWM_CTL(panel
->backlight
.controller
));
1117 if (pwm_ctl
& BXT_BLC_PWM_ENABLE
) {
1118 DRM_DEBUG_KMS("backlight already enabled\n");
1119 pwm_ctl
&= ~BXT_BLC_PWM_ENABLE
;
1120 I915_WRITE(BXT_BLC_PWM_CTL(panel
->backlight
.controller
),
1124 I915_WRITE(BXT_BLC_PWM_FREQ(panel
->backlight
.controller
),
1125 panel
->backlight
.max
);
1127 intel_panel_actually_set_backlight(conn_state
, panel
->backlight
.level
);
1130 if (panel
->backlight
.active_low_pwm
)
1131 pwm_ctl
|= BXT_BLC_PWM_POLARITY
;
1133 I915_WRITE(BXT_BLC_PWM_CTL(panel
->backlight
.controller
), pwm_ctl
);
1134 POSTING_READ(BXT_BLC_PWM_CTL(panel
->backlight
.controller
));
1135 I915_WRITE(BXT_BLC_PWM_CTL(panel
->backlight
.controller
),
1136 pwm_ctl
| BXT_BLC_PWM_ENABLE
);
1139 static void pwm_enable_backlight(const struct intel_crtc_state
*crtc_state
,
1140 const struct drm_connector_state
*conn_state
)
1142 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
1143 struct intel_panel
*panel
= &connector
->panel
;
1145 pwm_enable(panel
->backlight
.pwm
);
1146 intel_panel_actually_set_backlight(conn_state
, panel
->backlight
.level
);
1149 void intel_panel_enable_backlight(const struct intel_crtc_state
*crtc_state
,
1150 const struct drm_connector_state
*conn_state
)
1152 struct intel_connector
*connector
= to_intel_connector(conn_state
->connector
);
1153 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1154 struct intel_panel
*panel
= &connector
->panel
;
1155 enum pipe pipe
= to_intel_crtc(crtc_state
->base
.crtc
)->pipe
;
1157 if (!panel
->backlight
.present
)
1160 DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe
));
1162 mutex_lock(&dev_priv
->backlight_lock
);
1164 WARN_ON(panel
->backlight
.max
== 0);
1166 if (panel
->backlight
.level
<= panel
->backlight
.min
) {
1167 panel
->backlight
.level
= panel
->backlight
.max
;
1168 if (panel
->backlight
.device
)
1169 panel
->backlight
.device
->props
.brightness
=
1170 scale_hw_to_user(connector
,
1171 panel
->backlight
.level
,
1172 panel
->backlight
.device
->props
.max_brightness
);
1175 panel
->backlight
.enable(crtc_state
, conn_state
);
1176 panel
->backlight
.enabled
= true;
1177 if (panel
->backlight
.device
)
1178 panel
->backlight
.device
->props
.power
= FB_BLANK_UNBLANK
;
1180 mutex_unlock(&dev_priv
->backlight_lock
);
1183 #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
1184 static int intel_backlight_device_update_status(struct backlight_device
*bd
)
1186 struct intel_connector
*connector
= bl_get_data(bd
);
1187 struct intel_panel
*panel
= &connector
->panel
;
1188 struct drm_device
*dev
= connector
->base
.dev
;
1190 drm_modeset_lock(&dev
->mode_config
.connection_mutex
, NULL
);
1191 DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n",
1192 bd
->props
.brightness
, bd
->props
.max_brightness
);
1193 intel_panel_set_backlight(connector
->base
.state
, bd
->props
.brightness
,
1194 bd
->props
.max_brightness
);
1197 * Allow flipping bl_power as a sub-state of enabled. Sadly the
1198 * backlight class device does not make it easy to to differentiate
1199 * between callbacks for brightness and bl_power, so our backlight_power
1200 * callback needs to take this into account.
1202 if (panel
->backlight
.enabled
) {
1203 if (panel
->backlight
.power
) {
1204 bool enable
= bd
->props
.power
== FB_BLANK_UNBLANK
&&
1205 bd
->props
.brightness
!= 0;
1206 panel
->backlight
.power(connector
, enable
);
1209 bd
->props
.power
= FB_BLANK_POWERDOWN
;
1212 drm_modeset_unlock(&dev
->mode_config
.connection_mutex
);
1216 static int intel_backlight_device_get_brightness(struct backlight_device
*bd
)
1218 struct intel_connector
*connector
= bl_get_data(bd
);
1219 struct drm_device
*dev
= connector
->base
.dev
;
1220 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1224 intel_runtime_pm_get(dev_priv
);
1225 drm_modeset_lock(&dev
->mode_config
.connection_mutex
, NULL
);
1227 hw_level
= intel_panel_get_backlight(connector
);
1228 ret
= scale_hw_to_user(connector
, hw_level
, bd
->props
.max_brightness
);
1230 drm_modeset_unlock(&dev
->mode_config
.connection_mutex
);
1231 intel_runtime_pm_put(dev_priv
);
1236 static const struct backlight_ops intel_backlight_device_ops
= {
1237 .update_status
= intel_backlight_device_update_status
,
1238 .get_brightness
= intel_backlight_device_get_brightness
,
1241 int intel_backlight_device_register(struct intel_connector
*connector
)
1243 struct intel_panel
*panel
= &connector
->panel
;
1244 struct backlight_properties props
;
1246 if (WARN_ON(panel
->backlight
.device
))
1249 if (!panel
->backlight
.present
)
1252 WARN_ON(panel
->backlight
.max
== 0);
1254 memset(&props
, 0, sizeof(props
));
1255 props
.type
= BACKLIGHT_RAW
;
1258 * Note: Everything should work even if the backlight device max
1259 * presented to the userspace is arbitrarily chosen.
1261 props
.max_brightness
= panel
->backlight
.max
;
1262 props
.brightness
= scale_hw_to_user(connector
,
1263 panel
->backlight
.level
,
1264 props
.max_brightness
);
1266 if (panel
->backlight
.enabled
)
1267 props
.power
= FB_BLANK_UNBLANK
;
1269 props
.power
= FB_BLANK_POWERDOWN
;
1272 * Note: using the same name independent of the connector prevents
1273 * registration of multiple backlight devices in the driver.
1275 panel
->backlight
.device
=
1276 backlight_device_register("intel_backlight",
1277 connector
->base
.kdev
,
1279 &intel_backlight_device_ops
, &props
);
1281 if (IS_ERR(panel
->backlight
.device
)) {
1282 DRM_ERROR("Failed to register backlight: %ld\n",
1283 PTR_ERR(panel
->backlight
.device
));
1284 panel
->backlight
.device
= NULL
;
1288 DRM_DEBUG_KMS("Connector %s backlight sysfs interface registered\n",
1289 connector
->base
.name
);
1294 void intel_backlight_device_unregister(struct intel_connector
*connector
)
1296 struct intel_panel
*panel
= &connector
->panel
;
1298 if (panel
->backlight
.device
) {
1299 backlight_device_unregister(panel
->backlight
.device
);
1300 panel
->backlight
.device
= NULL
;
1303 #endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */
1306 * CNP: PWM clock frequency is 19.2 MHz or 24 MHz.
1309 static u32
cnp_hz_to_pwm(struct intel_connector
*connector
, u32 pwm_freq_hz
)
1311 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1313 return DIV_ROUND_CLOSEST(KHz(dev_priv
->rawclk_freq
), pwm_freq_hz
);
1317 * BXT: PWM clock frequency = 19.2 MHz.
1319 static u32
bxt_hz_to_pwm(struct intel_connector
*connector
, u32 pwm_freq_hz
)
1321 return DIV_ROUND_CLOSEST(KHz(19200), pwm_freq_hz
);
1325 * SPT: This value represents the period of the PWM stream in clock periods
1326 * multiplied by 16 (default increment) or 128 (alternate increment selected in
1327 * SCHICKEN_1 bit 0). PWM clock is 24 MHz.
1329 static u32
spt_hz_to_pwm(struct intel_connector
*connector
, u32 pwm_freq_hz
)
1331 struct intel_panel
*panel
= &connector
->panel
;
1334 if (panel
->backlight
.alternate_pwm_increment
)
1339 return DIV_ROUND_CLOSEST(MHz(24), pwm_freq_hz
* mul
);
1343 * LPT: This value represents the period of the PWM stream in clock periods
1344 * multiplied by 128 (default increment) or 16 (alternate increment, selected in
1345 * LPT SOUTH_CHICKEN2 register bit 5).
1347 static u32
lpt_hz_to_pwm(struct intel_connector
*connector
, u32 pwm_freq_hz
)
1349 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1350 struct intel_panel
*panel
= &connector
->panel
;
1353 if (panel
->backlight
.alternate_pwm_increment
)
1358 if (HAS_PCH_LPT_H(dev_priv
))
1359 clock
= MHz(135); /* LPT:H */
1361 clock
= MHz(24); /* LPT:LP */
1363 return DIV_ROUND_CLOSEST(clock
, pwm_freq_hz
* mul
);
1367 * ILK/SNB/IVB: This value represents the period of the PWM stream in PCH
1368 * display raw clocks multiplied by 128.
1370 static u32
pch_hz_to_pwm(struct intel_connector
*connector
, u32 pwm_freq_hz
)
1372 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1374 return DIV_ROUND_CLOSEST(KHz(dev_priv
->rawclk_freq
), pwm_freq_hz
* 128);
1378 * Gen2: This field determines the number of time base events (display core
1379 * clock frequency/32) in total for a complete cycle of modulated backlight
1382 * Gen3: A time base event equals the display core clock ([DevPNV] HRAW clock)
1385 static u32
i9xx_hz_to_pwm(struct intel_connector
*connector
, u32 pwm_freq_hz
)
1387 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1390 if (IS_PINEVIEW(dev_priv
))
1391 clock
= KHz(dev_priv
->rawclk_freq
);
1393 clock
= KHz(dev_priv
->cdclk
.hw
.cdclk
);
1395 return DIV_ROUND_CLOSEST(clock
, pwm_freq_hz
* 32);
1399 * Gen4: This value represents the period of the PWM stream in display core
1400 * clocks ([DevCTG] HRAW clocks) multiplied by 128.
1403 static u32
i965_hz_to_pwm(struct intel_connector
*connector
, u32 pwm_freq_hz
)
1405 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1408 if (IS_G4X(dev_priv
))
1409 clock
= KHz(dev_priv
->rawclk_freq
);
1411 clock
= KHz(dev_priv
->cdclk
.hw
.cdclk
);
1413 return DIV_ROUND_CLOSEST(clock
, pwm_freq_hz
* 128);
1417 * VLV: This value represents the period of the PWM stream in display core
1418 * clocks ([DevCTG] 200MHz HRAW clocks) multiplied by 128 or 25MHz S0IX clocks
1419 * multiplied by 16. CHV uses a 19.2MHz S0IX clock.
1421 static u32
vlv_hz_to_pwm(struct intel_connector
*connector
, u32 pwm_freq_hz
)
1423 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1426 if ((I915_READ(CBR1_VLV
) & CBR_PWM_CLOCK_MUX_SELECT
) == 0) {
1427 if (IS_CHERRYVIEW(dev_priv
))
1433 clock
= KHz(dev_priv
->rawclk_freq
);
1437 return DIV_ROUND_CLOSEST(clock
, pwm_freq_hz
* mul
);
1440 static u32
get_backlight_max_vbt(struct intel_connector
*connector
)
1442 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1443 struct intel_panel
*panel
= &connector
->panel
;
1444 u16 pwm_freq_hz
= dev_priv
->vbt
.backlight
.pwm_freq_hz
;
1447 if (!panel
->backlight
.hz_to_pwm
) {
1448 DRM_DEBUG_KMS("backlight frequency conversion not supported\n");
1453 DRM_DEBUG_KMS("VBT defined backlight frequency %u Hz\n",
1457 DRM_DEBUG_KMS("default backlight frequency %u Hz\n",
1461 pwm
= panel
->backlight
.hz_to_pwm(connector
, pwm_freq_hz
);
1463 DRM_DEBUG_KMS("backlight frequency conversion failed\n");
1471 * Note: The setup hooks can't assume pipe is set!
1473 static u32
get_backlight_min_vbt(struct intel_connector
*connector
)
1475 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1476 struct intel_panel
*panel
= &connector
->panel
;
1479 WARN_ON(panel
->backlight
.max
== 0);
1482 * XXX: If the vbt value is 255, it makes min equal to max, which leads
1483 * to problems. There are such machines out there. Either our
1484 * interpretation is wrong or the vbt has bogus data. Or both. Safeguard
1485 * against this by letting the minimum be at most (arbitrarily chosen)
1488 min
= clamp_t(int, dev_priv
->vbt
.backlight
.min_brightness
, 0, 64);
1489 if (min
!= dev_priv
->vbt
.backlight
.min_brightness
) {
1490 DRM_DEBUG_KMS("clamping VBT min backlight %d/255 to %d/255\n",
1491 dev_priv
->vbt
.backlight
.min_brightness
, min
);
1494 /* vbt value is a coefficient in range [0..255] */
1495 return scale(min
, 0, 255, 0, panel
->backlight
.max
);
1498 static int lpt_setup_backlight(struct intel_connector
*connector
, enum pipe unused
)
1500 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1501 struct intel_panel
*panel
= &connector
->panel
;
1502 u32 pch_ctl1
, pch_ctl2
, val
;
1505 if (HAS_PCH_LPT(dev_priv
))
1506 alt
= I915_READ(SOUTH_CHICKEN2
) & LPT_PWM_GRANULARITY
;
1508 alt
= I915_READ(SOUTH_CHICKEN1
) & SPT_PWM_GRANULARITY
;
1509 panel
->backlight
.alternate_pwm_increment
= alt
;
1511 pch_ctl1
= I915_READ(BLC_PWM_PCH_CTL1
);
1512 panel
->backlight
.active_low_pwm
= pch_ctl1
& BLM_PCH_POLARITY
;
1514 pch_ctl2
= I915_READ(BLC_PWM_PCH_CTL2
);
1515 panel
->backlight
.max
= pch_ctl2
>> 16;
1517 if (!panel
->backlight
.max
)
1518 panel
->backlight
.max
= get_backlight_max_vbt(connector
);
1520 if (!panel
->backlight
.max
)
1523 panel
->backlight
.min
= get_backlight_min_vbt(connector
);
1525 val
= lpt_get_backlight(connector
);
1526 val
= intel_panel_compute_brightness(connector
, val
);
1527 panel
->backlight
.level
= clamp(val
, panel
->backlight
.min
,
1528 panel
->backlight
.max
);
1530 panel
->backlight
.enabled
= pch_ctl1
& BLM_PCH_PWM_ENABLE
;
1535 static int pch_setup_backlight(struct intel_connector
*connector
, enum pipe unused
)
1537 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1538 struct intel_panel
*panel
= &connector
->panel
;
1539 u32 cpu_ctl2
, pch_ctl1
, pch_ctl2
, val
;
1541 pch_ctl1
= I915_READ(BLC_PWM_PCH_CTL1
);
1542 panel
->backlight
.active_low_pwm
= pch_ctl1
& BLM_PCH_POLARITY
;
1544 pch_ctl2
= I915_READ(BLC_PWM_PCH_CTL2
);
1545 panel
->backlight
.max
= pch_ctl2
>> 16;
1547 if (!panel
->backlight
.max
)
1548 panel
->backlight
.max
= get_backlight_max_vbt(connector
);
1550 if (!panel
->backlight
.max
)
1553 panel
->backlight
.min
= get_backlight_min_vbt(connector
);
1555 val
= pch_get_backlight(connector
);
1556 val
= intel_panel_compute_brightness(connector
, val
);
1557 panel
->backlight
.level
= clamp(val
, panel
->backlight
.min
,
1558 panel
->backlight
.max
);
1560 cpu_ctl2
= I915_READ(BLC_PWM_CPU_CTL2
);
1561 panel
->backlight
.enabled
= (cpu_ctl2
& BLM_PWM_ENABLE
) &&
1562 (pch_ctl1
& BLM_PCH_PWM_ENABLE
);
1567 static int i9xx_setup_backlight(struct intel_connector
*connector
, enum pipe unused
)
1569 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1570 struct intel_panel
*panel
= &connector
->panel
;
1573 ctl
= I915_READ(BLC_PWM_CTL
);
1575 if (IS_GEN2(dev_priv
) || IS_I915GM(dev_priv
) || IS_I945GM(dev_priv
))
1576 panel
->backlight
.combination_mode
= ctl
& BLM_LEGACY_MODE
;
1578 if (IS_PINEVIEW(dev_priv
))
1579 panel
->backlight
.active_low_pwm
= ctl
& BLM_POLARITY_PNV
;
1581 panel
->backlight
.max
= ctl
>> 17;
1583 if (!panel
->backlight
.max
) {
1584 panel
->backlight
.max
= get_backlight_max_vbt(connector
);
1585 panel
->backlight
.max
>>= 1;
1588 if (!panel
->backlight
.max
)
1591 if (panel
->backlight
.combination_mode
)
1592 panel
->backlight
.max
*= 0xff;
1594 panel
->backlight
.min
= get_backlight_min_vbt(connector
);
1596 val
= i9xx_get_backlight(connector
);
1597 val
= intel_panel_compute_brightness(connector
, val
);
1598 panel
->backlight
.level
= clamp(val
, panel
->backlight
.min
,
1599 panel
->backlight
.max
);
1601 panel
->backlight
.enabled
= val
!= 0;
1606 static int i965_setup_backlight(struct intel_connector
*connector
, enum pipe unused
)
1608 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1609 struct intel_panel
*panel
= &connector
->panel
;
1612 ctl2
= I915_READ(BLC_PWM_CTL2
);
1613 panel
->backlight
.combination_mode
= ctl2
& BLM_COMBINATION_MODE
;
1614 panel
->backlight
.active_low_pwm
= ctl2
& BLM_POLARITY_I965
;
1616 ctl
= I915_READ(BLC_PWM_CTL
);
1617 panel
->backlight
.max
= ctl
>> 16;
1619 if (!panel
->backlight
.max
)
1620 panel
->backlight
.max
= get_backlight_max_vbt(connector
);
1622 if (!panel
->backlight
.max
)
1625 if (panel
->backlight
.combination_mode
)
1626 panel
->backlight
.max
*= 0xff;
1628 panel
->backlight
.min
= get_backlight_min_vbt(connector
);
1630 val
= i9xx_get_backlight(connector
);
1631 val
= intel_panel_compute_brightness(connector
, val
);
1632 panel
->backlight
.level
= clamp(val
, panel
->backlight
.min
,
1633 panel
->backlight
.max
);
1635 panel
->backlight
.enabled
= ctl2
& BLM_PWM_ENABLE
;
1640 static int vlv_setup_backlight(struct intel_connector
*connector
, enum pipe pipe
)
1642 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1643 struct intel_panel
*panel
= &connector
->panel
;
1646 if (WARN_ON(pipe
!= PIPE_A
&& pipe
!= PIPE_B
))
1649 ctl2
= I915_READ(VLV_BLC_PWM_CTL2(pipe
));
1650 panel
->backlight
.active_low_pwm
= ctl2
& BLM_POLARITY_I965
;
1652 ctl
= I915_READ(VLV_BLC_PWM_CTL(pipe
));
1653 panel
->backlight
.max
= ctl
>> 16;
1655 if (!panel
->backlight
.max
)
1656 panel
->backlight
.max
= get_backlight_max_vbt(connector
);
1658 if (!panel
->backlight
.max
)
1661 panel
->backlight
.min
= get_backlight_min_vbt(connector
);
1663 val
= _vlv_get_backlight(dev_priv
, pipe
);
1664 val
= intel_panel_compute_brightness(connector
, val
);
1665 panel
->backlight
.level
= clamp(val
, panel
->backlight
.min
,
1666 panel
->backlight
.max
);
1668 panel
->backlight
.enabled
= ctl2
& BLM_PWM_ENABLE
;
1674 bxt_setup_backlight(struct intel_connector
*connector
, enum pipe unused
)
1676 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1677 struct intel_panel
*panel
= &connector
->panel
;
1680 panel
->backlight
.controller
= dev_priv
->vbt
.backlight
.controller
;
1682 pwm_ctl
= I915_READ(BXT_BLC_PWM_CTL(panel
->backlight
.controller
));
1684 /* Controller 1 uses the utility pin. */
1685 if (panel
->backlight
.controller
== 1) {
1686 val
= I915_READ(UTIL_PIN_CTL
);
1687 panel
->backlight
.util_pin_active_low
=
1688 val
& UTIL_PIN_POLARITY
;
1691 panel
->backlight
.active_low_pwm
= pwm_ctl
& BXT_BLC_PWM_POLARITY
;
1692 panel
->backlight
.max
=
1693 I915_READ(BXT_BLC_PWM_FREQ(panel
->backlight
.controller
));
1695 if (!panel
->backlight
.max
)
1696 panel
->backlight
.max
= get_backlight_max_vbt(connector
);
1698 if (!panel
->backlight
.max
)
1701 val
= bxt_get_backlight(connector
);
1702 val
= intel_panel_compute_brightness(connector
, val
);
1703 panel
->backlight
.level
= clamp(val
, panel
->backlight
.min
,
1704 panel
->backlight
.max
);
1706 panel
->backlight
.enabled
= pwm_ctl
& BXT_BLC_PWM_ENABLE
;
1712 cnp_setup_backlight(struct intel_connector
*connector
, enum pipe unused
)
1714 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1715 struct intel_panel
*panel
= &connector
->panel
;
1719 * CNP has the BXT implementation of backlight, but with only
1720 * one controller. Future platforms could have multiple controllers
1721 * so let's make this extensible and prepared for the future.
1723 panel
->backlight
.controller
= 0;
1725 pwm_ctl
= I915_READ(BXT_BLC_PWM_CTL(panel
->backlight
.controller
));
1727 panel
->backlight
.active_low_pwm
= pwm_ctl
& BXT_BLC_PWM_POLARITY
;
1728 panel
->backlight
.max
=
1729 I915_READ(BXT_BLC_PWM_FREQ(panel
->backlight
.controller
));
1731 if (!panel
->backlight
.max
)
1732 panel
->backlight
.max
= get_backlight_max_vbt(connector
);
1734 if (!panel
->backlight
.max
)
1737 val
= bxt_get_backlight(connector
);
1738 val
= intel_panel_compute_brightness(connector
, val
);
1739 panel
->backlight
.level
= clamp(val
, panel
->backlight
.min
,
1740 panel
->backlight
.max
);
1742 panel
->backlight
.enabled
= pwm_ctl
& BXT_BLC_PWM_ENABLE
;
1747 static int pwm_setup_backlight(struct intel_connector
*connector
,
1750 struct drm_device
*dev
= connector
->base
.dev
;
1751 struct intel_panel
*panel
= &connector
->panel
;
1754 /* Get the PWM chip for backlight control */
1755 panel
->backlight
.pwm
= pwm_get(dev
->dev
, "pwm_backlight");
1756 if (IS_ERR(panel
->backlight
.pwm
)) {
1757 DRM_ERROR("Failed to own the pwm chip\n");
1758 panel
->backlight
.pwm
= NULL
;
1763 * FIXME: pwm_apply_args() should be removed when switching to
1764 * the atomic PWM API.
1766 pwm_apply_args(panel
->backlight
.pwm
);
1768 retval
= pwm_config(panel
->backlight
.pwm
, CRC_PMIC_PWM_PERIOD_NS
,
1769 CRC_PMIC_PWM_PERIOD_NS
);
1771 DRM_ERROR("Failed to configure the pwm chip\n");
1772 pwm_put(panel
->backlight
.pwm
);
1773 panel
->backlight
.pwm
= NULL
;
1777 panel
->backlight
.min
= 0; /* 0% */
1778 panel
->backlight
.max
= 100; /* 100% */
1779 panel
->backlight
.level
= DIV_ROUND_UP(
1780 pwm_get_duty_cycle(panel
->backlight
.pwm
) * 100,
1781 CRC_PMIC_PWM_PERIOD_NS
);
1782 panel
->backlight
.enabled
= panel
->backlight
.level
!= 0;
1787 int intel_panel_setup_backlight(struct drm_connector
*connector
, enum pipe pipe
)
1789 struct drm_i915_private
*dev_priv
= to_i915(connector
->dev
);
1790 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
1791 struct intel_panel
*panel
= &intel_connector
->panel
;
1794 if (!dev_priv
->vbt
.backlight
.present
) {
1795 if (dev_priv
->quirks
& QUIRK_BACKLIGHT_PRESENT
) {
1796 DRM_DEBUG_KMS("no backlight present per VBT, but present per quirk\n");
1798 DRM_DEBUG_KMS("no backlight present per VBT\n");
1803 /* ensure intel_panel has been initialized first */
1804 if (WARN_ON(!panel
->backlight
.setup
))
1807 /* set level and max in panel struct */
1808 mutex_lock(&dev_priv
->backlight_lock
);
1809 ret
= panel
->backlight
.setup(intel_connector
, pipe
);
1810 mutex_unlock(&dev_priv
->backlight_lock
);
1813 DRM_DEBUG_KMS("failed to setup backlight for connector %s\n",
1818 panel
->backlight
.present
= true;
1820 DRM_DEBUG_KMS("Connector %s backlight initialized, %s, brightness %u/%u\n",
1822 enableddisabled(panel
->backlight
.enabled
),
1823 panel
->backlight
.level
, panel
->backlight
.max
);
1828 void intel_panel_destroy_backlight(struct drm_connector
*connector
)
1830 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
1831 struct intel_panel
*panel
= &intel_connector
->panel
;
1833 /* dispose of the pwm */
1834 if (panel
->backlight
.pwm
)
1835 pwm_put(panel
->backlight
.pwm
);
1837 panel
->backlight
.present
= false;
1840 /* Set up chip specific backlight functions */
1842 intel_panel_init_backlight_funcs(struct intel_panel
*panel
)
1844 struct intel_connector
*connector
=
1845 container_of(panel
, struct intel_connector
, panel
);
1846 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
1848 if (connector
->base
.connector_type
== DRM_MODE_CONNECTOR_eDP
&&
1849 intel_dp_aux_init_backlight_funcs(connector
) == 0)
1852 if (connector
->base
.connector_type
== DRM_MODE_CONNECTOR_DSI
&&
1853 intel_dsi_dcs_init_backlight_funcs(connector
) == 0)
1856 if (IS_GEN9_LP(dev_priv
)) {
1857 panel
->backlight
.setup
= bxt_setup_backlight
;
1858 panel
->backlight
.enable
= bxt_enable_backlight
;
1859 panel
->backlight
.disable
= bxt_disable_backlight
;
1860 panel
->backlight
.set
= bxt_set_backlight
;
1861 panel
->backlight
.get
= bxt_get_backlight
;
1862 panel
->backlight
.hz_to_pwm
= bxt_hz_to_pwm
;
1863 } else if (HAS_PCH_CNP(dev_priv
)) {
1864 panel
->backlight
.setup
= cnp_setup_backlight
;
1865 panel
->backlight
.enable
= cnp_enable_backlight
;
1866 panel
->backlight
.disable
= cnp_disable_backlight
;
1867 panel
->backlight
.set
= bxt_set_backlight
;
1868 panel
->backlight
.get
= bxt_get_backlight
;
1869 panel
->backlight
.hz_to_pwm
= cnp_hz_to_pwm
;
1870 } else if (HAS_PCH_LPT(dev_priv
) || HAS_PCH_SPT(dev_priv
) ||
1871 HAS_PCH_KBP(dev_priv
)) {
1872 panel
->backlight
.setup
= lpt_setup_backlight
;
1873 panel
->backlight
.enable
= lpt_enable_backlight
;
1874 panel
->backlight
.disable
= lpt_disable_backlight
;
1875 panel
->backlight
.set
= lpt_set_backlight
;
1876 panel
->backlight
.get
= lpt_get_backlight
;
1877 if (HAS_PCH_LPT(dev_priv
))
1878 panel
->backlight
.hz_to_pwm
= lpt_hz_to_pwm
;
1880 panel
->backlight
.hz_to_pwm
= spt_hz_to_pwm
;
1881 } else if (HAS_PCH_SPLIT(dev_priv
)) {
1882 panel
->backlight
.setup
= pch_setup_backlight
;
1883 panel
->backlight
.enable
= pch_enable_backlight
;
1884 panel
->backlight
.disable
= pch_disable_backlight
;
1885 panel
->backlight
.set
= pch_set_backlight
;
1886 panel
->backlight
.get
= pch_get_backlight
;
1887 panel
->backlight
.hz_to_pwm
= pch_hz_to_pwm
;
1888 } else if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) {
1889 if (connector
->base
.connector_type
== DRM_MODE_CONNECTOR_DSI
) {
1890 panel
->backlight
.setup
= pwm_setup_backlight
;
1891 panel
->backlight
.enable
= pwm_enable_backlight
;
1892 panel
->backlight
.disable
= pwm_disable_backlight
;
1893 panel
->backlight
.set
= pwm_set_backlight
;
1894 panel
->backlight
.get
= pwm_get_backlight
;
1896 panel
->backlight
.setup
= vlv_setup_backlight
;
1897 panel
->backlight
.enable
= vlv_enable_backlight
;
1898 panel
->backlight
.disable
= vlv_disable_backlight
;
1899 panel
->backlight
.set
= vlv_set_backlight
;
1900 panel
->backlight
.get
= vlv_get_backlight
;
1901 panel
->backlight
.hz_to_pwm
= vlv_hz_to_pwm
;
1903 } else if (IS_GEN4(dev_priv
)) {
1904 panel
->backlight
.setup
= i965_setup_backlight
;
1905 panel
->backlight
.enable
= i965_enable_backlight
;
1906 panel
->backlight
.disable
= i965_disable_backlight
;
1907 panel
->backlight
.set
= i9xx_set_backlight
;
1908 panel
->backlight
.get
= i9xx_get_backlight
;
1909 panel
->backlight
.hz_to_pwm
= i965_hz_to_pwm
;
1911 panel
->backlight
.setup
= i9xx_setup_backlight
;
1912 panel
->backlight
.enable
= i9xx_enable_backlight
;
1913 panel
->backlight
.disable
= i9xx_disable_backlight
;
1914 panel
->backlight
.set
= i9xx_set_backlight
;
1915 panel
->backlight
.get
= i9xx_get_backlight
;
1916 panel
->backlight
.hz_to_pwm
= i9xx_hz_to_pwm
;
1920 int intel_panel_init(struct intel_panel
*panel
,
1921 struct drm_display_mode
*fixed_mode
,
1922 struct drm_display_mode
*downclock_mode
)
1924 intel_panel_init_backlight_funcs(panel
);
1926 panel
->fixed_mode
= fixed_mode
;
1927 panel
->downclock_mode
= downclock_mode
;
1932 void intel_panel_fini(struct intel_panel
*panel
)
1934 struct intel_connector
*intel_connector
=
1935 container_of(panel
, struct intel_connector
, panel
);
1937 if (panel
->fixed_mode
)
1938 drm_mode_destroy(intel_connector
->base
.dev
, panel
->fixed_mode
);
1940 if (panel
->downclock_mode
)
1941 drm_mode_destroy(intel_connector
->base
.dev
,
1942 panel
->downclock_mode
);