2 * Copyright © 2006-2010 Intel Corporation
3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Eric Anholt <eric@anholt.net>
26 * Dave Airlie <airlied@linux.ie>
27 * Jesse Barnes <jesse.barnes@intel.com>
28 * Chris Wilson <chris@chris-wilson.co.uk>
31 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
33 #include <linux/moduleparam.h>
34 #include "intel_drv.h"
36 #define PCI_LBPC 0xf4 /* legacy/combination backlight modes */
39 intel_fixed_panel_mode(struct drm_display_mode
*fixed_mode
,
40 struct drm_display_mode
*adjusted_mode
)
42 adjusted_mode
->hdisplay
= fixed_mode
->hdisplay
;
43 adjusted_mode
->hsync_start
= fixed_mode
->hsync_start
;
44 adjusted_mode
->hsync_end
= fixed_mode
->hsync_end
;
45 adjusted_mode
->htotal
= fixed_mode
->htotal
;
47 adjusted_mode
->vdisplay
= fixed_mode
->vdisplay
;
48 adjusted_mode
->vsync_start
= fixed_mode
->vsync_start
;
49 adjusted_mode
->vsync_end
= fixed_mode
->vsync_end
;
50 adjusted_mode
->vtotal
= fixed_mode
->vtotal
;
52 adjusted_mode
->clock
= fixed_mode
->clock
;
55 /* adjusted_mode has been preset to be the panel's fixed mode */
57 intel_pch_panel_fitting(struct drm_device
*dev
,
59 const struct drm_display_mode
*mode
,
60 struct drm_display_mode
*adjusted_mode
)
62 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
63 int x
, y
, width
, height
;
65 x
= y
= width
= height
= 0;
67 /* Native modes don't need fitting */
68 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
69 adjusted_mode
->vdisplay
== mode
->vdisplay
)
72 switch (fitting_mode
) {
73 case DRM_MODE_SCALE_CENTER
:
74 width
= mode
->hdisplay
;
75 height
= mode
->vdisplay
;
76 x
= (adjusted_mode
->hdisplay
- width
+ 1)/2;
77 y
= (adjusted_mode
->vdisplay
- height
+ 1)/2;
80 case DRM_MODE_SCALE_ASPECT
:
81 /* Scale but preserve the aspect ratio */
83 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
84 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
85 if (scaled_width
> scaled_height
) { /* pillar */
86 width
= scaled_height
/ mode
->vdisplay
;
89 x
= (adjusted_mode
->hdisplay
- width
+ 1) / 2;
91 height
= adjusted_mode
->vdisplay
;
92 } else if (scaled_width
< scaled_height
) { /* letter */
93 height
= scaled_width
/ mode
->hdisplay
;
96 y
= (adjusted_mode
->vdisplay
- height
+ 1) / 2;
98 width
= adjusted_mode
->hdisplay
;
101 width
= adjusted_mode
->hdisplay
;
102 height
= adjusted_mode
->vdisplay
;
108 case DRM_MODE_SCALE_FULLSCREEN
:
110 width
= adjusted_mode
->hdisplay
;
111 height
= adjusted_mode
->vdisplay
;
116 dev_priv
->pch_pf_pos
= (x
<< 16) | y
;
117 dev_priv
->pch_pf_size
= (width
<< 16) | height
;
120 static int is_backlight_combination_mode(struct drm_device
*dev
)
122 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
124 if (INTEL_INFO(dev
)->gen
>= 4)
125 return I915_READ(BLC_PWM_CTL2
) & BLM_COMBINATION_MODE
;
128 return I915_READ(BLC_PWM_CTL
) & BLM_LEGACY_MODE
;
133 static u32
i915_read_blc_pwm_ctl(struct drm_i915_private
*dev_priv
)
137 /* Restore the CTL value if it lost, e.g. GPU reset */
139 if (HAS_PCH_SPLIT(dev_priv
->dev
)) {
140 val
= I915_READ(BLC_PWM_PCH_CTL2
);
141 if (dev_priv
->regfile
.saveBLC_PWM_CTL2
== 0) {
142 dev_priv
->regfile
.saveBLC_PWM_CTL2
= val
;
143 } else if (val
== 0) {
144 I915_WRITE(BLC_PWM_PCH_CTL2
,
145 dev_priv
->regfile
.saveBLC_PWM_CTL2
);
146 val
= dev_priv
->regfile
.saveBLC_PWM_CTL2
;
149 val
= I915_READ(BLC_PWM_CTL
);
150 if (dev_priv
->regfile
.saveBLC_PWM_CTL
== 0) {
151 dev_priv
->regfile
.saveBLC_PWM_CTL
= val
;
152 dev_priv
->regfile
.saveBLC_PWM_CTL2
= I915_READ(BLC_PWM_CTL2
);
153 } else if (val
== 0) {
154 I915_WRITE(BLC_PWM_CTL
,
155 dev_priv
->regfile
.saveBLC_PWM_CTL
);
156 I915_WRITE(BLC_PWM_CTL2
,
157 dev_priv
->regfile
.saveBLC_PWM_CTL2
);
158 val
= dev_priv
->regfile
.saveBLC_PWM_CTL
;
165 static u32
_intel_panel_get_max_backlight(struct drm_device
*dev
)
167 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
170 max
= i915_read_blc_pwm_ctl(dev_priv
);
172 if (HAS_PCH_SPLIT(dev
)) {
175 if (INTEL_INFO(dev
)->gen
< 4)
180 if (is_backlight_combination_mode(dev
))
187 u32
intel_panel_get_max_backlight(struct drm_device
*dev
)
191 max
= _intel_panel_get_max_backlight(dev
);
193 /* XXX add code here to query mode clock or hardware clock
194 * and program max PWM appropriately.
196 pr_warn_once("fixme: max PWM is zero\n");
200 DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max
);
204 static int i915_panel_invert_brightness
;
205 MODULE_PARM_DESC(invert_brightness
, "Invert backlight brightness "
206 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
207 "report PCI device ID, subsystem vendor and subsystem device ID "
208 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
209 "It will then be included in an upcoming module version.");
210 module_param_named(invert_brightness
, i915_panel_invert_brightness
, int, 0600);
211 static u32
intel_panel_compute_brightness(struct drm_device
*dev
, u32 val
)
213 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
215 if (i915_panel_invert_brightness
< 0)
218 if (i915_panel_invert_brightness
> 0 ||
219 dev_priv
->quirks
& QUIRK_INVERT_BRIGHTNESS
)
220 return intel_panel_get_max_backlight(dev
) - val
;
225 static u32
intel_panel_get_backlight(struct drm_device
*dev
)
227 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
230 if (HAS_PCH_SPLIT(dev
)) {
231 val
= I915_READ(BLC_PWM_CPU_CTL
) & BACKLIGHT_DUTY_CYCLE_MASK
;
233 val
= I915_READ(BLC_PWM_CTL
) & BACKLIGHT_DUTY_CYCLE_MASK
;
234 if (INTEL_INFO(dev
)->gen
< 4)
237 if (is_backlight_combination_mode(dev
)) {
240 pci_read_config_byte(dev
->pdev
, PCI_LBPC
, &lbpc
);
245 val
= intel_panel_compute_brightness(dev
, val
);
246 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val
);
250 static void intel_pch_panel_set_backlight(struct drm_device
*dev
, u32 level
)
252 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
253 u32 val
= I915_READ(BLC_PWM_CPU_CTL
) & ~BACKLIGHT_DUTY_CYCLE_MASK
;
254 I915_WRITE(BLC_PWM_CPU_CTL
, val
| level
);
257 static void intel_panel_actually_set_backlight(struct drm_device
*dev
, u32 level
)
259 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
262 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level
);
263 level
= intel_panel_compute_brightness(dev
, level
);
265 if (HAS_PCH_SPLIT(dev
))
266 return intel_pch_panel_set_backlight(dev
, level
);
268 if (is_backlight_combination_mode(dev
)) {
269 u32 max
= intel_panel_get_max_backlight(dev
);
272 lbpc
= level
* 0xfe / max
+ 1;
274 pci_write_config_byte(dev
->pdev
, PCI_LBPC
, lbpc
);
277 tmp
= I915_READ(BLC_PWM_CTL
);
278 if (INTEL_INFO(dev
)->gen
< 4)
280 tmp
&= ~BACKLIGHT_DUTY_CYCLE_MASK
;
281 I915_WRITE(BLC_PWM_CTL
, tmp
| level
);
284 void intel_panel_set_backlight(struct drm_device
*dev
, u32 level
)
286 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
288 dev_priv
->backlight_level
= level
;
289 if (dev_priv
->backlight_enabled
)
290 intel_panel_actually_set_backlight(dev
, level
);
293 void intel_panel_disable_backlight(struct drm_device
*dev
)
295 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
297 dev_priv
->backlight_enabled
= false;
298 intel_panel_actually_set_backlight(dev
, 0);
300 if (INTEL_INFO(dev
)->gen
>= 4) {
303 reg
= HAS_PCH_SPLIT(dev
) ? BLC_PWM_CPU_CTL2
: BLC_PWM_CTL2
;
305 I915_WRITE(reg
, I915_READ(reg
) & ~BLM_PWM_ENABLE
);
307 if (HAS_PCH_SPLIT(dev
)) {
308 tmp
= I915_READ(BLC_PWM_PCH_CTL1
);
309 tmp
&= ~BLM_PCH_PWM_ENABLE
;
310 I915_WRITE(BLC_PWM_PCH_CTL1
, tmp
);
315 void intel_panel_enable_backlight(struct drm_device
*dev
,
318 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
320 if (dev_priv
->backlight_level
== 0)
321 dev_priv
->backlight_level
= intel_panel_get_max_backlight(dev
);
323 if (INTEL_INFO(dev
)->gen
>= 4) {
326 reg
= HAS_PCH_SPLIT(dev
) ? BLC_PWM_CPU_CTL2
: BLC_PWM_CTL2
;
329 tmp
= I915_READ(reg
);
331 /* Note that this can also get called through dpms changes. And
332 * we don't track the backlight dpms state, hence check whether
333 * we have to do anything first. */
334 if (tmp
& BLM_PWM_ENABLE
)
337 if (dev_priv
->num_pipe
== 3)
338 tmp
&= ~BLM_PIPE_SELECT_IVB
;
340 tmp
&= ~BLM_PIPE_SELECT
;
342 tmp
|= BLM_PIPE(pipe
);
343 tmp
&= ~BLM_PWM_ENABLE
;
345 I915_WRITE(reg
, tmp
);
347 I915_WRITE(reg
, tmp
| BLM_PWM_ENABLE
);
349 if (HAS_PCH_SPLIT(dev
)) {
350 tmp
= I915_READ(BLC_PWM_PCH_CTL1
);
351 tmp
|= BLM_PCH_PWM_ENABLE
;
352 tmp
&= ~BLM_PCH_OVERRIDE_ENABLE
;
353 I915_WRITE(BLC_PWM_PCH_CTL1
, tmp
);
358 /* Call below after setting BLC_PWM_CPU_CTL2 and BLC_PWM_PCH_CTL1.
359 * BLC_PWM_CPU_CTL may be cleared to zero automatically when these
362 dev_priv
->backlight_enabled
= true;
363 intel_panel_actually_set_backlight(dev
, dev_priv
->backlight_level
);
366 static void intel_panel_init_backlight(struct drm_device
*dev
)
368 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
370 dev_priv
->backlight_level
= intel_panel_get_backlight(dev
);
371 dev_priv
->backlight_enabled
= dev_priv
->backlight_level
!= 0;
374 enum drm_connector_status
375 intel_panel_detect(struct drm_device
*dev
)
378 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
381 if (i915_panel_ignore_lid
)
382 return i915_panel_ignore_lid
> 0 ?
383 connector_status_connected
:
384 connector_status_disconnected
;
386 /* opregion lid state on HP 2540p is wrong at boot up,
387 * appears to be either the BIOS or Linux ACPI fault */
389 /* Assume that the BIOS does not lie through the OpRegion... */
390 if (dev_priv
->opregion
.lid_state
)
391 return ioread32(dev_priv
->opregion
.lid_state
) & 0x1 ?
392 connector_status_connected
:
393 connector_status_disconnected
;
396 return connector_status_unknown
;
399 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
400 static int intel_panel_update_status(struct backlight_device
*bd
)
402 struct drm_device
*dev
= bl_get_data(bd
);
403 intel_panel_set_backlight(dev
, bd
->props
.brightness
);
407 static int intel_panel_get_brightness(struct backlight_device
*bd
)
409 struct drm_device
*dev
= bl_get_data(bd
);
410 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
411 return dev_priv
->backlight_level
;
414 static const struct backlight_ops intel_panel_bl_ops
= {
415 .update_status
= intel_panel_update_status
,
416 .get_brightness
= intel_panel_get_brightness
,
419 int intel_panel_setup_backlight(struct drm_connector
*connector
)
421 struct drm_device
*dev
= connector
->dev
;
422 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
423 struct backlight_properties props
;
425 intel_panel_init_backlight(dev
);
427 memset(&props
, 0, sizeof(props
));
428 props
.type
= BACKLIGHT_RAW
;
429 props
.max_brightness
= _intel_panel_get_max_backlight(dev
);
430 if (props
.max_brightness
== 0) {
431 DRM_DEBUG_DRIVER("Failed to get maximum backlight value\n");
434 dev_priv
->backlight
=
435 backlight_device_register("intel_backlight",
436 &connector
->kdev
, dev
,
437 &intel_panel_bl_ops
, &props
);
439 if (IS_ERR(dev_priv
->backlight
)) {
440 DRM_ERROR("Failed to register backlight: %ld\n",
441 PTR_ERR(dev_priv
->backlight
));
442 dev_priv
->backlight
= NULL
;
445 dev_priv
->backlight
->props
.brightness
= intel_panel_get_backlight(dev
);
449 void intel_panel_destroy_backlight(struct drm_device
*dev
)
451 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
452 if (dev_priv
->backlight
)
453 backlight_device_unregister(dev_priv
->backlight
);
456 int intel_panel_setup_backlight(struct drm_connector
*connector
)
458 intel_panel_init_backlight(connector
->dev
);
462 void intel_panel_destroy_backlight(struct drm_device
*dev
)
468 int intel_panel_init(struct intel_panel
*panel
,
469 struct drm_display_mode
*fixed_mode
)
471 panel
->fixed_mode
= fixed_mode
;
476 void intel_panel_fini(struct intel_panel
*panel
)
478 struct intel_connector
*intel_connector
=
479 container_of(panel
, struct intel_connector
, panel
);
481 if (panel
->fixed_mode
)
482 drm_mode_destroy(intel_connector
->base
.dev
, panel
->fixed_mode
);