2 * Copyright © 2006-2010 Intel Corporation
3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Eric Anholt <eric@anholt.net>
26 * Dave Airlie <airlied@linux.ie>
27 * Jesse Barnes <jesse.barnes@intel.com>
28 * Chris Wilson <chris@chris-wilson.co.uk>
31 #include "intel_drv.h"
33 #define PCI_LBPC 0xf4 /* legacy/combination backlight modes */
36 intel_fixed_panel_mode(struct drm_display_mode
*fixed_mode
,
37 struct drm_display_mode
*adjusted_mode
)
39 adjusted_mode
->hdisplay
= fixed_mode
->hdisplay
;
40 adjusted_mode
->hsync_start
= fixed_mode
->hsync_start
;
41 adjusted_mode
->hsync_end
= fixed_mode
->hsync_end
;
42 adjusted_mode
->htotal
= fixed_mode
->htotal
;
44 adjusted_mode
->vdisplay
= fixed_mode
->vdisplay
;
45 adjusted_mode
->vsync_start
= fixed_mode
->vsync_start
;
46 adjusted_mode
->vsync_end
= fixed_mode
->vsync_end
;
47 adjusted_mode
->vtotal
= fixed_mode
->vtotal
;
49 adjusted_mode
->clock
= fixed_mode
->clock
;
51 drm_mode_set_crtcinfo(adjusted_mode
, CRTC_INTERLACE_HALVE_V
);
54 /* adjusted_mode has been preset to be the panel's fixed mode */
56 intel_pch_panel_fitting(struct drm_device
*dev
,
58 struct drm_display_mode
*mode
,
59 struct drm_display_mode
*adjusted_mode
)
61 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
62 int x
, y
, width
, height
;
64 x
= y
= width
= height
= 0;
66 /* Native modes don't need fitting */
67 if (adjusted_mode
->hdisplay
== mode
->hdisplay
&&
68 adjusted_mode
->vdisplay
== mode
->vdisplay
)
71 switch (fitting_mode
) {
72 case DRM_MODE_SCALE_CENTER
:
73 width
= mode
->hdisplay
;
74 height
= mode
->vdisplay
;
75 x
= (adjusted_mode
->hdisplay
- width
+ 1)/2;
76 y
= (adjusted_mode
->vdisplay
- height
+ 1)/2;
79 case DRM_MODE_SCALE_ASPECT
:
80 /* Scale but preserve the aspect ratio */
82 u32 scaled_width
= adjusted_mode
->hdisplay
* mode
->vdisplay
;
83 u32 scaled_height
= mode
->hdisplay
* adjusted_mode
->vdisplay
;
84 if (scaled_width
> scaled_height
) { /* pillar */
85 width
= scaled_height
/ mode
->vdisplay
;
88 x
= (adjusted_mode
->hdisplay
- width
+ 1) / 2;
90 height
= adjusted_mode
->vdisplay
;
91 } else if (scaled_width
< scaled_height
) { /* letter */
92 height
= scaled_width
/ mode
->hdisplay
;
95 y
= (adjusted_mode
->vdisplay
- height
+ 1) / 2;
97 width
= adjusted_mode
->hdisplay
;
100 width
= adjusted_mode
->hdisplay
;
101 height
= adjusted_mode
->vdisplay
;
107 case DRM_MODE_SCALE_FULLSCREEN
:
109 width
= adjusted_mode
->hdisplay
;
110 height
= adjusted_mode
->vdisplay
;
115 dev_priv
->pch_pf_pos
= (x
<< 16) | y
;
116 dev_priv
->pch_pf_size
= (width
<< 16) | height
;
119 static int is_backlight_combination_mode(struct drm_device
*dev
)
121 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
123 if (INTEL_INFO(dev
)->gen
>= 4)
124 return I915_READ(BLC_PWM_CTL2
) & BLM_COMBINATION_MODE
;
127 return I915_READ(BLC_PWM_CTL
) & BLM_LEGACY_MODE
;
132 static u32
i915_read_blc_pwm_ctl(struct drm_i915_private
*dev_priv
)
136 /* Restore the CTL value if it lost, e.g. GPU reset */
138 if (HAS_PCH_SPLIT(dev_priv
->dev
)) {
139 val
= I915_READ(BLC_PWM_PCH_CTL2
);
140 if (dev_priv
->saveBLC_PWM_CTL2
== 0) {
141 dev_priv
->saveBLC_PWM_CTL2
= val
;
142 } else if (val
== 0) {
143 I915_WRITE(BLC_PWM_PCH_CTL2
,
144 dev_priv
->saveBLC_PWM_CTL
);
145 val
= dev_priv
->saveBLC_PWM_CTL
;
148 val
= I915_READ(BLC_PWM_CTL
);
149 if (dev_priv
->saveBLC_PWM_CTL
== 0) {
150 dev_priv
->saveBLC_PWM_CTL
= val
;
151 dev_priv
->saveBLC_PWM_CTL2
= I915_READ(BLC_PWM_CTL2
);
152 } else if (val
== 0) {
153 I915_WRITE(BLC_PWM_CTL
,
154 dev_priv
->saveBLC_PWM_CTL
);
155 I915_WRITE(BLC_PWM_CTL2
,
156 dev_priv
->saveBLC_PWM_CTL2
);
157 val
= dev_priv
->saveBLC_PWM_CTL
;
164 u32
intel_panel_get_max_backlight(struct drm_device
*dev
)
166 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
169 max
= i915_read_blc_pwm_ctl(dev_priv
);
171 /* XXX add code here to query mode clock or hardware clock
172 * and program max PWM appropriately.
174 printk_once(KERN_WARNING
"fixme: max PWM is zero.\n");
178 if (HAS_PCH_SPLIT(dev
)) {
181 if (IS_PINEVIEW(dev
)) {
185 if (INTEL_INFO(dev
)->gen
< 4)
189 if (is_backlight_combination_mode(dev
))
193 DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max
);
197 u32
intel_panel_get_backlight(struct drm_device
*dev
)
199 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
202 if (HAS_PCH_SPLIT(dev
)) {
203 val
= I915_READ(BLC_PWM_CPU_CTL
) & BACKLIGHT_DUTY_CYCLE_MASK
;
205 val
= I915_READ(BLC_PWM_CTL
) & BACKLIGHT_DUTY_CYCLE_MASK
;
206 if (IS_PINEVIEW(dev
))
209 if (is_backlight_combination_mode(dev
)){
213 pci_read_config_byte(dev
->pdev
, PCI_LBPC
, &lbpc
);
218 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val
);
222 static void intel_pch_panel_set_backlight(struct drm_device
*dev
, u32 level
)
224 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
225 u32 val
= I915_READ(BLC_PWM_CPU_CTL
) & ~BACKLIGHT_DUTY_CYCLE_MASK
;
226 I915_WRITE(BLC_PWM_CPU_CTL
, val
| level
);
229 static void intel_panel_actually_set_backlight(struct drm_device
*dev
, u32 level
)
231 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
234 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level
);
236 if (HAS_PCH_SPLIT(dev
))
237 return intel_pch_panel_set_backlight(dev
, level
);
239 if (is_backlight_combination_mode(dev
)){
240 u32 max
= intel_panel_get_max_backlight(dev
);
243 lbpc
= level
* 0xfe / max
+ 1;
245 pci_write_config_byte(dev
->pdev
, PCI_LBPC
, lbpc
);
248 tmp
= I915_READ(BLC_PWM_CTL
);
249 if (IS_PINEVIEW(dev
)) {
250 tmp
&= ~(BACKLIGHT_DUTY_CYCLE_MASK
- 1);
253 tmp
&= ~BACKLIGHT_DUTY_CYCLE_MASK
;
254 I915_WRITE(BLC_PWM_CTL
, tmp
| level
);
257 void intel_panel_set_backlight(struct drm_device
*dev
, u32 level
)
259 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
261 dev_priv
->backlight_level
= level
;
262 if (dev_priv
->backlight_enabled
)
263 intel_panel_actually_set_backlight(dev
, level
);
266 void intel_panel_disable_backlight(struct drm_device
*dev
)
268 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
270 dev_priv
->backlight_enabled
= false;
271 intel_panel_actually_set_backlight(dev
, 0);
274 void intel_panel_enable_backlight(struct drm_device
*dev
)
276 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
278 if (dev_priv
->backlight_level
== 0)
279 dev_priv
->backlight_level
= intel_panel_get_max_backlight(dev
);
281 dev_priv
->backlight_enabled
= true;
282 intel_panel_actually_set_backlight(dev
, dev_priv
->backlight_level
);
285 static void intel_panel_init_backlight(struct drm_device
*dev
)
287 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
289 dev_priv
->backlight_level
= intel_panel_get_backlight(dev
);
290 dev_priv
->backlight_enabled
= dev_priv
->backlight_level
!= 0;
293 enum drm_connector_status
294 intel_panel_detect(struct drm_device
*dev
)
297 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
300 if (i915_panel_ignore_lid
)
301 return i915_panel_ignore_lid
> 0 ?
302 connector_status_connected
:
303 connector_status_disconnected
;
305 /* opregion lid state on HP 2540p is wrong at boot up,
306 * appears to be either the BIOS or Linux ACPI fault */
308 /* Assume that the BIOS does not lie through the OpRegion... */
309 if (dev_priv
->opregion
.lid_state
)
310 return ioread32(dev_priv
->opregion
.lid_state
) & 0x1 ?
311 connector_status_connected
:
312 connector_status_disconnected
;
315 return connector_status_unknown
;
318 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
319 static int intel_panel_update_status(struct backlight_device
*bd
)
321 struct drm_device
*dev
= bl_get_data(bd
);
322 intel_panel_set_backlight(dev
, bd
->props
.brightness
);
326 static int intel_panel_get_brightness(struct backlight_device
*bd
)
328 struct drm_device
*dev
= bl_get_data(bd
);
329 return intel_panel_get_backlight(dev
);
332 static const struct backlight_ops intel_panel_bl_ops
= {
333 .update_status
= intel_panel_update_status
,
334 .get_brightness
= intel_panel_get_brightness
,
337 int intel_panel_setup_backlight(struct drm_device
*dev
)
339 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
340 struct backlight_properties props
;
341 struct drm_connector
*connector
;
343 intel_panel_init_backlight(dev
);
345 if (dev_priv
->int_lvds_connector
)
346 connector
= dev_priv
->int_lvds_connector
;
347 else if (dev_priv
->int_edp_connector
)
348 connector
= dev_priv
->int_edp_connector
;
352 props
.type
= BACKLIGHT_RAW
;
353 props
.max_brightness
= intel_panel_get_max_backlight(dev
);
354 dev_priv
->backlight
=
355 backlight_device_register("intel_backlight",
356 &connector
->kdev
, dev
,
357 &intel_panel_bl_ops
, &props
);
359 if (IS_ERR(dev_priv
->backlight
)) {
360 DRM_ERROR("Failed to register backlight: %ld\n",
361 PTR_ERR(dev_priv
->backlight
));
362 dev_priv
->backlight
= NULL
;
365 dev_priv
->backlight
->props
.brightness
= intel_panel_get_backlight(dev
);
369 void intel_panel_destroy_backlight(struct drm_device
*dev
)
371 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
372 if (dev_priv
->backlight
)
373 backlight_device_unregister(dev_priv
->backlight
);
376 int intel_panel_setup_backlight(struct drm_device
*dev
)
378 intel_panel_init_backlight(dev
);
382 void intel_panel_destroy_backlight(struct drm_device
*dev
)