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
;
86 x
= (adjusted_mode
->hdisplay
- width
+ 1) / 2;
88 height
= adjusted_mode
->vdisplay
;
89 } else if (scaled_width
< scaled_height
) { /* letter */
90 height
= scaled_width
/ mode
->hdisplay
;
91 y
= (adjusted_mode
->vdisplay
- height
+ 1) / 2;
93 width
= adjusted_mode
->hdisplay
;
96 width
= adjusted_mode
->hdisplay
;
97 height
= adjusted_mode
->vdisplay
;
103 case DRM_MODE_SCALE_FULLSCREEN
:
105 width
= adjusted_mode
->hdisplay
;
106 height
= adjusted_mode
->vdisplay
;
111 dev_priv
->pch_pf_pos
= (x
<< 16) | y
;
112 dev_priv
->pch_pf_size
= (width
<< 16) | height
;
115 static int is_backlight_combination_mode(struct drm_device
*dev
)
117 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
119 if (INTEL_INFO(dev
)->gen
>= 4)
120 return I915_READ(BLC_PWM_CTL2
) & BLM_COMBINATION_MODE
;
123 return I915_READ(BLC_PWM_CTL
) & BLM_LEGACY_MODE
;
128 static u32
i915_read_blc_pwm_ctl(struct drm_i915_private
*dev_priv
)
132 /* Restore the CTL value if it lost, e.g. GPU reset */
134 if (HAS_PCH_SPLIT(dev_priv
->dev
)) {
135 val
= I915_READ(BLC_PWM_PCH_CTL2
);
136 if (dev_priv
->saveBLC_PWM_CTL2
== 0) {
137 dev_priv
->saveBLC_PWM_CTL2
= val
;
138 } else if (val
== 0) {
139 I915_WRITE(BLC_PWM_PCH_CTL2
,
140 dev_priv
->saveBLC_PWM_CTL
);
141 val
= dev_priv
->saveBLC_PWM_CTL
;
144 val
= I915_READ(BLC_PWM_CTL
);
145 if (dev_priv
->saveBLC_PWM_CTL
== 0) {
146 dev_priv
->saveBLC_PWM_CTL
= val
;
147 dev_priv
->saveBLC_PWM_CTL2
= I915_READ(BLC_PWM_CTL2
);
148 } else if (val
== 0) {
149 I915_WRITE(BLC_PWM_CTL
,
150 dev_priv
->saveBLC_PWM_CTL
);
151 I915_WRITE(BLC_PWM_CTL2
,
152 dev_priv
->saveBLC_PWM_CTL2
);
153 val
= dev_priv
->saveBLC_PWM_CTL
;
160 u32
intel_panel_get_max_backlight(struct drm_device
*dev
)
162 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
165 max
= i915_read_blc_pwm_ctl(dev_priv
);
167 /* XXX add code here to query mode clock or hardware clock
168 * and program max PWM appropriately.
170 printk_once(KERN_WARNING
"fixme: max PWM is zero.\n");
174 if (HAS_PCH_SPLIT(dev
)) {
177 if (IS_PINEVIEW(dev
)) {
181 if (INTEL_INFO(dev
)->gen
< 4)
185 if (is_backlight_combination_mode(dev
))
189 DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max
);
193 u32
intel_panel_get_backlight(struct drm_device
*dev
)
195 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
198 if (HAS_PCH_SPLIT(dev
)) {
199 val
= I915_READ(BLC_PWM_CPU_CTL
) & BACKLIGHT_DUTY_CYCLE_MASK
;
201 val
= I915_READ(BLC_PWM_CTL
) & BACKLIGHT_DUTY_CYCLE_MASK
;
202 if (IS_PINEVIEW(dev
))
205 if (is_backlight_combination_mode(dev
)){
209 pci_read_config_byte(dev
->pdev
, PCI_LBPC
, &lbpc
);
214 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val
);
218 static void intel_pch_panel_set_backlight(struct drm_device
*dev
, u32 level
)
220 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
221 u32 val
= I915_READ(BLC_PWM_CPU_CTL
) & ~BACKLIGHT_DUTY_CYCLE_MASK
;
222 I915_WRITE(BLC_PWM_CPU_CTL
, val
| level
);
225 void intel_panel_set_backlight(struct drm_device
*dev
, u32 level
)
227 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
230 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level
);
232 if (HAS_PCH_SPLIT(dev
))
233 return intel_pch_panel_set_backlight(dev
, level
);
235 if (is_backlight_combination_mode(dev
)){
236 u32 max
= intel_panel_get_max_backlight(dev
);
239 lbpc
= level
* 0xfe / max
+ 1;
241 pci_write_config_byte(dev
->pdev
, PCI_LBPC
, lbpc
);
244 tmp
= I915_READ(BLC_PWM_CTL
);
245 if (IS_PINEVIEW(dev
)) {
246 tmp
&= ~(BACKLIGHT_DUTY_CYCLE_MASK
- 1);
249 tmp
&= ~BACKLIGHT_DUTY_CYCLE_MASK
;
250 I915_WRITE(BLC_PWM_CTL
, tmp
| level
);
253 void intel_panel_disable_backlight(struct drm_device
*dev
)
255 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
257 if (dev_priv
->backlight_enabled
) {
258 dev_priv
->backlight_level
= intel_panel_get_backlight(dev
);
259 dev_priv
->backlight_enabled
= false;
262 intel_panel_set_backlight(dev
, 0);
265 void intel_panel_enable_backlight(struct drm_device
*dev
)
267 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
269 if (dev_priv
->backlight_level
== 0)
270 dev_priv
->backlight_level
= intel_panel_get_max_backlight(dev
);
272 intel_panel_set_backlight(dev
, dev_priv
->backlight_level
);
273 dev_priv
->backlight_enabled
= true;
276 void intel_panel_setup_backlight(struct drm_device
*dev
)
278 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
280 dev_priv
->backlight_level
= intel_panel_get_backlight(dev
);
281 dev_priv
->backlight_enabled
= dev_priv
->backlight_level
!= 0;
284 enum drm_connector_status
285 intel_panel_detect(struct drm_device
*dev
)
288 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
291 if (i915_panel_ignore_lid
)
292 return i915_panel_ignore_lid
> 0 ?
293 connector_status_connected
:
294 connector_status_disconnected
;
296 /* opregion lid state on HP 2540p is wrong at boot up,
297 * appears to be either the BIOS or Linux ACPI fault */
299 /* Assume that the BIOS does not lie through the OpRegion... */
300 if (dev_priv
->opregion
.lid_state
)
301 return ioread32(dev_priv
->opregion
.lid_state
) & 0x1 ?
302 connector_status_connected
:
303 connector_status_disconnected
;
306 return connector_status_unknown
;