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1 | /* |
1 | /* |
2 | * Copyright © 2006-2010 Intel Corporation |
2 | * Copyright © 2006-2010 Intel Corporation |
3 | * Copyright (c) 2006 Dave Airlie |
3 | * Copyright (c) 2006 Dave Airlie |
4 | * |
4 | * |
5 | * Permission is hereby granted, free of charge, to any person obtaining a |
5 | * Permission is hereby granted, free of charge, to any person obtaining a |
6 | * copy of this software and associated documentation files (the "Software"), |
6 | * copy of this software and associated documentation files (the "Software"), |
7 | * to deal in the Software without restriction, including without limitation |
7 | * to deal in the Software without restriction, including without limitation |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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 |
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: |
10 | * Software is furnished to do so, subject to the following conditions: |
11 | * |
11 | * |
12 | * The above copyright notice and this permission notice (including the next |
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 |
13 | * paragraph) shall be included in all copies or substantial portions of the |
14 | * Software. |
14 | * Software. |
15 | * |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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, |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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 |
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 |
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 |
21 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
22 | * DEALINGS IN THE SOFTWARE. |
22 | * DEALINGS IN THE SOFTWARE. |
23 | * |
23 | * |
24 | * Authors: |
24 | * Authors: |
25 | * Eric Anholt |
25 | * Eric Anholt |
26 | * Dave Airlie |
26 | * Dave Airlie |
27 | * Jesse Barnes |
27 | * Jesse Barnes |
28 | * Chris Wilson |
28 | * Chris Wilson |
29 | */ |
29 | */ |
30 | 30 | ||
31 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
31 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
32 | 32 | ||
33 | #include |
33 | #include |
34 | #include "intel_drv.h" |
34 | #include "intel_drv.h" |
35 | - | ||
36 | 35 | ||
37 | #define PCI_LBPC 0xf4 /* legacy/combination backlight modes */ |
36 | #define PCI_LBPC 0xf4 /* legacy/combination backlight modes */ |
38 | 37 | ||
39 | void |
38 | void |
40 | intel_fixed_panel_mode(struct drm_display_mode *fixed_mode, |
39 | intel_fixed_panel_mode(struct drm_display_mode *fixed_mode, |
41 | struct drm_display_mode *adjusted_mode) |
40 | struct drm_display_mode *adjusted_mode) |
42 | { |
41 | { |
43 | adjusted_mode->hdisplay = fixed_mode->hdisplay; |
42 | adjusted_mode->hdisplay = fixed_mode->hdisplay; |
44 | adjusted_mode->hsync_start = fixed_mode->hsync_start; |
43 | adjusted_mode->hsync_start = fixed_mode->hsync_start; |
45 | adjusted_mode->hsync_end = fixed_mode->hsync_end; |
44 | adjusted_mode->hsync_end = fixed_mode->hsync_end; |
46 | adjusted_mode->htotal = fixed_mode->htotal; |
45 | adjusted_mode->htotal = fixed_mode->htotal; |
47 | 46 | ||
48 | adjusted_mode->vdisplay = fixed_mode->vdisplay; |
47 | adjusted_mode->vdisplay = fixed_mode->vdisplay; |
49 | adjusted_mode->vsync_start = fixed_mode->vsync_start; |
48 | adjusted_mode->vsync_start = fixed_mode->vsync_start; |
50 | adjusted_mode->vsync_end = fixed_mode->vsync_end; |
49 | adjusted_mode->vsync_end = fixed_mode->vsync_end; |
51 | adjusted_mode->vtotal = fixed_mode->vtotal; |
50 | adjusted_mode->vtotal = fixed_mode->vtotal; |
52 | 51 | ||
53 | adjusted_mode->clock = fixed_mode->clock; |
52 | adjusted_mode->clock = fixed_mode->clock; |
54 | } |
53 | } |
55 | 54 | ||
56 | /* adjusted_mode has been preset to be the panel's fixed mode */ |
55 | /* adjusted_mode has been preset to be the panel's fixed mode */ |
57 | void |
56 | void |
58 | intel_pch_panel_fitting(struct drm_device *dev, |
57 | intel_pch_panel_fitting(struct drm_device *dev, |
59 | int fitting_mode, |
58 | int fitting_mode, |
60 | const struct drm_display_mode *mode, |
59 | const struct drm_display_mode *mode, |
61 | struct drm_display_mode *adjusted_mode) |
60 | struct drm_display_mode *adjusted_mode) |
62 | { |
61 | { |
63 | struct drm_i915_private *dev_priv = dev->dev_private; |
62 | struct drm_i915_private *dev_priv = dev->dev_private; |
64 | int x, y, width, height; |
63 | int x, y, width, height; |
65 | 64 | ||
66 | x = y = width = height = 0; |
65 | x = y = width = height = 0; |
67 | 66 | ||
68 | /* Native modes don't need fitting */ |
67 | /* Native modes don't need fitting */ |
69 | if (adjusted_mode->hdisplay == mode->hdisplay && |
68 | if (adjusted_mode->hdisplay == mode->hdisplay && |
70 | adjusted_mode->vdisplay == mode->vdisplay) |
69 | adjusted_mode->vdisplay == mode->vdisplay) |
71 | goto done; |
70 | goto done; |
72 | 71 | ||
73 | switch (fitting_mode) { |
72 | switch (fitting_mode) { |
74 | case DRM_MODE_SCALE_CENTER: |
73 | case DRM_MODE_SCALE_CENTER: |
75 | width = mode->hdisplay; |
74 | width = mode->hdisplay; |
76 | height = mode->vdisplay; |
75 | height = mode->vdisplay; |
77 | x = (adjusted_mode->hdisplay - width + 1)/2; |
76 | x = (adjusted_mode->hdisplay - width + 1)/2; |
78 | y = (adjusted_mode->vdisplay - height + 1)/2; |
77 | y = (adjusted_mode->vdisplay - height + 1)/2; |
79 | break; |
78 | break; |
80 | 79 | ||
81 | case DRM_MODE_SCALE_ASPECT: |
80 | case DRM_MODE_SCALE_ASPECT: |
82 | /* Scale but preserve the aspect ratio */ |
81 | /* Scale but preserve the aspect ratio */ |
83 | { |
82 | { |
84 | u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay; |
83 | u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay; |
85 | u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay; |
84 | u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay; |
86 | if (scaled_width > scaled_height) { /* pillar */ |
85 | if (scaled_width > scaled_height) { /* pillar */ |
87 | width = scaled_height / mode->vdisplay; |
86 | width = scaled_height / mode->vdisplay; |
88 | if (width & 1) |
87 | if (width & 1) |
89 | width++; |
88 | width++; |
90 | x = (adjusted_mode->hdisplay - width + 1) / 2; |
89 | x = (adjusted_mode->hdisplay - width + 1) / 2; |
91 | y = 0; |
90 | y = 0; |
92 | height = adjusted_mode->vdisplay; |
91 | height = adjusted_mode->vdisplay; |
93 | } else if (scaled_width < scaled_height) { /* letter */ |
92 | } else if (scaled_width < scaled_height) { /* letter */ |
94 | height = scaled_width / mode->hdisplay; |
93 | height = scaled_width / mode->hdisplay; |
95 | if (height & 1) |
94 | if (height & 1) |
96 | height++; |
95 | height++; |
97 | y = (adjusted_mode->vdisplay - height + 1) / 2; |
96 | y = (adjusted_mode->vdisplay - height + 1) / 2; |
98 | x = 0; |
97 | x = 0; |
99 | width = adjusted_mode->hdisplay; |
98 | width = adjusted_mode->hdisplay; |
100 | } else { |
99 | } else { |
101 | x = y = 0; |
100 | x = y = 0; |
102 | width = adjusted_mode->hdisplay; |
101 | width = adjusted_mode->hdisplay; |
103 | height = adjusted_mode->vdisplay; |
102 | height = adjusted_mode->vdisplay; |
104 | } |
103 | } |
105 | } |
104 | } |
106 | break; |
105 | break; |
107 | 106 | ||
108 | default: |
107 | default: |
109 | case DRM_MODE_SCALE_FULLSCREEN: |
108 | case DRM_MODE_SCALE_FULLSCREEN: |
110 | x = y = 0; |
109 | x = y = 0; |
111 | width = adjusted_mode->hdisplay; |
110 | width = adjusted_mode->hdisplay; |
112 | height = adjusted_mode->vdisplay; |
111 | height = adjusted_mode->vdisplay; |
113 | break; |
112 | break; |
114 | } |
113 | } |
115 | 114 | ||
116 | done: |
115 | done: |
117 | dev_priv->pch_pf_pos = (x << 16) | y; |
116 | dev_priv->pch_pf_pos = (x << 16) | y; |
118 | dev_priv->pch_pf_size = (width << 16) | height; |
117 | dev_priv->pch_pf_size = (width << 16) | height; |
119 | } |
118 | } |
120 | 119 | ||
121 | static int is_backlight_combination_mode(struct drm_device *dev) |
120 | static int is_backlight_combination_mode(struct drm_device *dev) |
122 | { |
121 | { |
123 | struct drm_i915_private *dev_priv = dev->dev_private; |
122 | struct drm_i915_private *dev_priv = dev->dev_private; |
124 | 123 | ||
125 | if (INTEL_INFO(dev)->gen >= 4) |
124 | if (INTEL_INFO(dev)->gen >= 4) |
126 | return I915_READ(BLC_PWM_CTL2) & BLM_COMBINATION_MODE; |
125 | return I915_READ(BLC_PWM_CTL2) & BLM_COMBINATION_MODE; |
127 | 126 | ||
128 | if (IS_GEN2(dev)) |
127 | if (IS_GEN2(dev)) |
129 | return I915_READ(BLC_PWM_CTL) & BLM_LEGACY_MODE; |
128 | return I915_READ(BLC_PWM_CTL) & BLM_LEGACY_MODE; |
130 | 129 | ||
131 | return 0; |
130 | return 0; |
132 | } |
131 | } |
133 | 132 | ||
134 | static u32 i915_read_blc_pwm_ctl(struct drm_i915_private *dev_priv) |
133 | static u32 i915_read_blc_pwm_ctl(struct drm_i915_private *dev_priv) |
135 | { |
134 | { |
136 | u32 val; |
135 | u32 val; |
137 | 136 | ||
138 | /* Restore the CTL value if it lost, e.g. GPU reset */ |
137 | /* Restore the CTL value if it lost, e.g. GPU reset */ |
139 | 138 | ||
140 | if (HAS_PCH_SPLIT(dev_priv->dev)) { |
139 | if (HAS_PCH_SPLIT(dev_priv->dev)) { |
141 | val = I915_READ(BLC_PWM_PCH_CTL2); |
140 | val = I915_READ(BLC_PWM_PCH_CTL2); |
142 | if (dev_priv->saveBLC_PWM_CTL2 == 0) { |
141 | if (dev_priv->saveBLC_PWM_CTL2 == 0) { |
143 | dev_priv->saveBLC_PWM_CTL2 = val; |
142 | dev_priv->saveBLC_PWM_CTL2 = val; |
144 | } else if (val == 0) { |
143 | } else if (val == 0) { |
145 | I915_WRITE(BLC_PWM_PCH_CTL2, |
144 | I915_WRITE(BLC_PWM_PCH_CTL2, |
146 | dev_priv->saveBLC_PWM_CTL2); |
145 | dev_priv->saveBLC_PWM_CTL2); |
147 | val = dev_priv->saveBLC_PWM_CTL2; |
146 | val = dev_priv->saveBLC_PWM_CTL2; |
148 | } |
147 | } |
149 | } else { |
148 | } else { |
150 | val = I915_READ(BLC_PWM_CTL); |
149 | val = I915_READ(BLC_PWM_CTL); |
151 | if (dev_priv->saveBLC_PWM_CTL == 0) { |
150 | if (dev_priv->saveBLC_PWM_CTL == 0) { |
152 | dev_priv->saveBLC_PWM_CTL = val; |
151 | dev_priv->saveBLC_PWM_CTL = val; |
153 | dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2); |
152 | dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2); |
154 | } else if (val == 0) { |
153 | } else if (val == 0) { |
155 | I915_WRITE(BLC_PWM_CTL, |
154 | I915_WRITE(BLC_PWM_CTL, |
156 | dev_priv->saveBLC_PWM_CTL); |
155 | dev_priv->saveBLC_PWM_CTL); |
157 | I915_WRITE(BLC_PWM_CTL2, |
156 | I915_WRITE(BLC_PWM_CTL2, |
158 | dev_priv->saveBLC_PWM_CTL2); |
157 | dev_priv->saveBLC_PWM_CTL2); |
159 | val = dev_priv->saveBLC_PWM_CTL; |
158 | val = dev_priv->saveBLC_PWM_CTL; |
160 | } |
159 | } |
161 | } |
160 | } |
162 | 161 | ||
163 | return val; |
162 | return val; |
164 | } |
163 | } |
165 | 164 | ||
166 | static u32 _intel_panel_get_max_backlight(struct drm_device *dev) |
165 | static u32 _intel_panel_get_max_backlight(struct drm_device *dev) |
167 | { |
166 | { |
168 | struct drm_i915_private *dev_priv = dev->dev_private; |
167 | struct drm_i915_private *dev_priv = dev->dev_private; |
169 | u32 max; |
168 | u32 max; |
170 | 169 | ||
171 | max = i915_read_blc_pwm_ctl(dev_priv); |
170 | max = i915_read_blc_pwm_ctl(dev_priv); |
172 | 171 | ||
173 | if (HAS_PCH_SPLIT(dev)) { |
172 | if (HAS_PCH_SPLIT(dev)) { |
174 | max >>= 16; |
173 | max >>= 16; |
175 | } else { |
174 | } else { |
176 | if (INTEL_INFO(dev)->gen < 4) |
175 | if (INTEL_INFO(dev)->gen < 4) |
177 | max >>= 17; |
176 | max >>= 17; |
178 | else |
177 | else |
179 | max >>= 16; |
178 | max >>= 16; |
180 | 179 | ||
181 | if (is_backlight_combination_mode(dev)) |
180 | if (is_backlight_combination_mode(dev)) |
182 | max *= 0xff; |
181 | max *= 0xff; |
183 | } |
182 | } |
184 | 183 | ||
185 | return max; |
184 | return max; |
186 | } |
185 | } |
187 | 186 | ||
188 | u32 intel_panel_get_max_backlight(struct drm_device *dev) |
187 | u32 intel_panel_get_max_backlight(struct drm_device *dev) |
189 | { |
188 | { |
190 | u32 max; |
189 | u32 max; |
191 | 190 | ||
192 | max = _intel_panel_get_max_backlight(dev); |
191 | max = _intel_panel_get_max_backlight(dev); |
193 | if (max == 0) { |
192 | if (max == 0) { |
194 | /* XXX add code here to query mode clock or hardware clock |
193 | /* XXX add code here to query mode clock or hardware clock |
195 | * and program max PWM appropriately. |
194 | * and program max PWM appropriately. |
196 | */ |
195 | */ |
197 | printk("fixme: max PWM is zero\n"); |
196 | printk("fixme: max PWM is zero\n"); |
198 | return 1; |
197 | return 1; |
199 | } |
198 | } |
200 | 199 | ||
201 | DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max); |
200 | DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max); |
202 | return max; |
201 | return max; |
203 | } |
202 | } |
204 | 203 | ||
205 | static int i915_panel_invert_brightness; |
204 | static int i915_panel_invert_brightness; |
206 | MODULE_PARM_DESC(invert_brightness, "Invert backlight brightness " |
205 | MODULE_PARM_DESC(invert_brightness, "Invert backlight brightness " |
207 | "(-1 force normal, 0 machine defaults, 1 force inversion), please " |
206 | "(-1 force normal, 0 machine defaults, 1 force inversion), please " |
208 | "report PCI device ID, subsystem vendor and subsystem device ID " |
207 | "report PCI device ID, subsystem vendor and subsystem device ID " |
209 | "to dri-devel@lists.freedesktop.org, if your machine needs it. " |
208 | "to dri-devel@lists.freedesktop.org, if your machine needs it. " |
210 | "It will then be included in an upcoming module version."); |
209 | "It will then be included in an upcoming module version."); |
211 | module_param_named(invert_brightness, i915_panel_invert_brightness, int, 0600); |
210 | module_param_named(invert_brightness, i915_panel_invert_brightness, int, 0600); |
212 | static u32 intel_panel_compute_brightness(struct drm_device *dev, u32 val) |
211 | static u32 intel_panel_compute_brightness(struct drm_device *dev, u32 val) |
213 | { |
212 | { |
214 | struct drm_i915_private *dev_priv = dev->dev_private; |
213 | struct drm_i915_private *dev_priv = dev->dev_private; |
215 | 214 | ||
216 | if (i915_panel_invert_brightness < 0) |
215 | if (i915_panel_invert_brightness < 0) |
217 | return val; |
216 | return val; |
218 | 217 | ||
219 | if (i915_panel_invert_brightness > 0 || |
218 | if (i915_panel_invert_brightness > 0 || |
220 | dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) |
219 | dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) |
221 | return intel_panel_get_max_backlight(dev) - val; |
220 | return intel_panel_get_max_backlight(dev) - val; |
222 | 221 | ||
223 | return val; |
222 | return val; |
224 | } |
223 | } |
225 | 224 | ||
226 | static u32 intel_panel_get_backlight(struct drm_device *dev) |
225 | static u32 intel_panel_get_backlight(struct drm_device *dev) |
227 | { |
226 | { |
228 | struct drm_i915_private *dev_priv = dev->dev_private; |
227 | struct drm_i915_private *dev_priv = dev->dev_private; |
229 | u32 val; |
228 | u32 val; |
230 | 229 | ||
231 | if (HAS_PCH_SPLIT(dev)) { |
230 | if (HAS_PCH_SPLIT(dev)) { |
232 | val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; |
231 | val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; |
233 | } else { |
232 | } else { |
234 | val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; |
233 | val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; |
235 | if (INTEL_INFO(dev)->gen < 4) |
234 | if (INTEL_INFO(dev)->gen < 4) |
236 | val >>= 1; |
235 | val >>= 1; |
237 | 236 | ||
238 | if (is_backlight_combination_mode(dev)) { |
237 | if (is_backlight_combination_mode(dev)) { |
239 | u8 lbpc; |
238 | u8 lbpc; |
240 | 239 | ||
241 | pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc); |
240 | pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc); |
242 | val *= lbpc; |
241 | val *= lbpc; |
243 | } |
242 | } |
244 | } |
243 | } |
245 | 244 | ||
246 | val = intel_panel_compute_brightness(dev, val); |
245 | val = intel_panel_compute_brightness(dev, val); |
247 | DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val); |
246 | DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val); |
248 | return val; |
247 | return val; |
249 | } |
248 | } |
250 | 249 | ||
251 | static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level) |
250 | static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level) |
252 | { |
251 | { |
253 | struct drm_i915_private *dev_priv = dev->dev_private; |
252 | struct drm_i915_private *dev_priv = dev->dev_private; |
254 | u32 val = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; |
253 | u32 val = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; |
255 | I915_WRITE(BLC_PWM_CPU_CTL, val | level); |
254 | I915_WRITE(BLC_PWM_CPU_CTL, val | level); |
256 | } |
255 | } |
257 | 256 | ||
258 | static void intel_panel_actually_set_backlight(struct drm_device *dev, u32 level) |
257 | static void intel_panel_actually_set_backlight(struct drm_device *dev, u32 level) |
259 | { |
258 | { |
260 | struct drm_i915_private *dev_priv = dev->dev_private; |
259 | struct drm_i915_private *dev_priv = dev->dev_private; |
261 | u32 tmp; |
260 | u32 tmp; |
262 | 261 | ||
263 | DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level); |
262 | DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level); |
264 | level = intel_panel_compute_brightness(dev, level); |
263 | level = intel_panel_compute_brightness(dev, level); |
265 | 264 | ||
266 | if (HAS_PCH_SPLIT(dev)) |
265 | if (HAS_PCH_SPLIT(dev)) |
267 | return intel_pch_panel_set_backlight(dev, level); |
266 | return intel_pch_panel_set_backlight(dev, level); |
268 | 267 | ||
269 | if (is_backlight_combination_mode(dev)) { |
268 | if (is_backlight_combination_mode(dev)) { |
270 | u32 max = intel_panel_get_max_backlight(dev); |
269 | u32 max = intel_panel_get_max_backlight(dev); |
271 | u8 lbpc; |
270 | u8 lbpc; |
272 | 271 | ||
273 | lbpc = level * 0xfe / max + 1; |
272 | lbpc = level * 0xfe / max + 1; |
274 | level /= lbpc; |
273 | level /= lbpc; |
275 | pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc); |
274 | pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc); |
276 | } |
275 | } |
277 | 276 | ||
278 | tmp = I915_READ(BLC_PWM_CTL); |
277 | tmp = I915_READ(BLC_PWM_CTL); |
279 | if (INTEL_INFO(dev)->gen < 4) |
278 | if (INTEL_INFO(dev)->gen < 4) |
280 | level <<= 1; |
279 | level <<= 1; |
281 | tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK; |
280 | tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK; |
282 | I915_WRITE(BLC_PWM_CTL, tmp | level); |
281 | I915_WRITE(BLC_PWM_CTL, tmp | level); |
283 | } |
282 | } |
284 | 283 | ||
285 | void intel_panel_set_backlight(struct drm_device *dev, u32 level) |
284 | void intel_panel_set_backlight(struct drm_device *dev, u32 level) |
286 | { |
285 | { |
287 | struct drm_i915_private *dev_priv = dev->dev_private; |
286 | struct drm_i915_private *dev_priv = dev->dev_private; |
288 | 287 | ||
289 | dev_priv->backlight_level = level; |
288 | dev_priv->backlight_level = level; |
290 | if (dev_priv->backlight_enabled) |
289 | if (dev_priv->backlight_enabled) |
291 | intel_panel_actually_set_backlight(dev, level); |
290 | intel_panel_actually_set_backlight(dev, level); |
292 | } |
291 | } |
293 | 292 | ||
294 | void intel_panel_disable_backlight(struct drm_device *dev) |
293 | void intel_panel_disable_backlight(struct drm_device *dev) |
295 | { |
294 | { |
296 | struct drm_i915_private *dev_priv = dev->dev_private; |
295 | struct drm_i915_private *dev_priv = dev->dev_private; |
297 | 296 | ||
298 | dev_priv->backlight_enabled = false; |
297 | dev_priv->backlight_enabled = false; |
299 | intel_panel_actually_set_backlight(dev, 0); |
298 | intel_panel_actually_set_backlight(dev, 0); |
300 | 299 | ||
301 | if (INTEL_INFO(dev)->gen >= 4) { |
300 | if (INTEL_INFO(dev)->gen >= 4) { |
302 | uint32_t reg, tmp; |
301 | uint32_t reg, tmp; |
303 | 302 | ||
304 | reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2; |
303 | reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2; |
305 | 304 | ||
306 | I915_WRITE(reg, I915_READ(reg) & ~BLM_PWM_ENABLE); |
305 | I915_WRITE(reg, I915_READ(reg) & ~BLM_PWM_ENABLE); |
307 | 306 | ||
308 | if (HAS_PCH_SPLIT(dev)) { |
307 | if (HAS_PCH_SPLIT(dev)) { |
309 | tmp = I915_READ(BLC_PWM_PCH_CTL1); |
308 | tmp = I915_READ(BLC_PWM_PCH_CTL1); |
310 | tmp &= ~BLM_PCH_PWM_ENABLE; |
309 | tmp &= ~BLM_PCH_PWM_ENABLE; |
311 | I915_WRITE(BLC_PWM_PCH_CTL1, tmp); |
310 | I915_WRITE(BLC_PWM_PCH_CTL1, tmp); |
312 | } |
311 | } |
313 | } |
312 | } |
314 | } |
313 | } |
315 | 314 | ||
316 | void intel_panel_enable_backlight(struct drm_device *dev, |
315 | void intel_panel_enable_backlight(struct drm_device *dev, |
317 | enum pipe pipe) |
316 | enum pipe pipe) |
318 | { |
317 | { |
319 | struct drm_i915_private *dev_priv = dev->dev_private; |
318 | struct drm_i915_private *dev_priv = dev->dev_private; |
320 | 319 | ||
321 | if (dev_priv->backlight_level == 0) |
320 | if (dev_priv->backlight_level == 0) |
322 | dev_priv->backlight_level = intel_panel_get_max_backlight(dev); |
321 | dev_priv->backlight_level = intel_panel_get_max_backlight(dev); |
323 | 322 | ||
324 | if (INTEL_INFO(dev)->gen >= 4) { |
323 | if (INTEL_INFO(dev)->gen >= 4) { |
325 | uint32_t reg, tmp; |
324 | uint32_t reg, tmp; |
326 | 325 | ||
327 | reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2; |
326 | reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2; |
328 | 327 | ||
329 | 328 | ||
330 | tmp = I915_READ(reg); |
329 | tmp = I915_READ(reg); |
331 | 330 | ||
332 | /* Note that this can also get called through dpms changes. And |
331 | /* Note that this can also get called through dpms changes. And |
333 | * we don't track the backlight dpms state, hence check whether |
332 | * we don't track the backlight dpms state, hence check whether |
334 | * we have to do anything first. */ |
333 | * we have to do anything first. */ |
335 | if (tmp & BLM_PWM_ENABLE) |
334 | if (tmp & BLM_PWM_ENABLE) |
336 | goto set_level; |
335 | goto set_level; |
337 | 336 | ||
338 | if (dev_priv->num_pipe == 3) |
337 | if (dev_priv->num_pipe == 3) |
339 | tmp &= ~BLM_PIPE_SELECT_IVB; |
338 | tmp &= ~BLM_PIPE_SELECT_IVB; |
340 | else |
339 | else |
341 | tmp &= ~BLM_PIPE_SELECT; |
340 | tmp &= ~BLM_PIPE_SELECT; |
342 | 341 | ||
343 | tmp |= BLM_PIPE(pipe); |
342 | tmp |= BLM_PIPE(pipe); |
344 | tmp &= ~BLM_PWM_ENABLE; |
343 | tmp &= ~BLM_PWM_ENABLE; |
345 | 344 | ||
346 | I915_WRITE(reg, tmp); |
345 | I915_WRITE(reg, tmp); |
347 | POSTING_READ(reg); |
346 | POSTING_READ(reg); |
348 | I915_WRITE(reg, tmp | BLM_PWM_ENABLE); |
347 | I915_WRITE(reg, tmp | BLM_PWM_ENABLE); |
349 | 348 | ||
350 | if (HAS_PCH_SPLIT(dev)) { |
349 | if (HAS_PCH_SPLIT(dev)) { |
351 | tmp = I915_READ(BLC_PWM_PCH_CTL1); |
350 | tmp = I915_READ(BLC_PWM_PCH_CTL1); |
352 | tmp |= BLM_PCH_PWM_ENABLE; |
351 | tmp |= BLM_PCH_PWM_ENABLE; |
353 | tmp &= ~BLM_PCH_OVERRIDE_ENABLE; |
352 | tmp &= ~BLM_PCH_OVERRIDE_ENABLE; |
354 | I915_WRITE(BLC_PWM_PCH_CTL1, tmp); |
353 | I915_WRITE(BLC_PWM_PCH_CTL1, tmp); |
355 | } |
354 | } |
356 | } |
355 | } |
357 | 356 | ||
358 | set_level: |
357 | set_level: |
359 | /* Call below after setting BLC_PWM_CPU_CTL2 and BLC_PWM_PCH_CTL1. |
358 | /* Call below after setting BLC_PWM_CPU_CTL2 and BLC_PWM_PCH_CTL1. |
360 | * BLC_PWM_CPU_CTL may be cleared to zero automatically when these |
359 | * BLC_PWM_CPU_CTL may be cleared to zero automatically when these |
361 | * registers are set. |
360 | * registers are set. |
362 | */ |
361 | */ |
363 | dev_priv->backlight_enabled = true; |
362 | dev_priv->backlight_enabled = true; |
364 | intel_panel_actually_set_backlight(dev, dev_priv->backlight_level); |
363 | intel_panel_actually_set_backlight(dev, dev_priv->backlight_level); |
365 | } |
364 | } |
366 | 365 | ||
367 | static void intel_panel_init_backlight(struct drm_device *dev) |
366 | static void intel_panel_init_backlight(struct drm_device *dev) |
368 | { |
367 | { |
369 | struct drm_i915_private *dev_priv = dev->dev_private; |
368 | struct drm_i915_private *dev_priv = dev->dev_private; |
370 | 369 | ||
371 | dev_priv->backlight_level = intel_panel_get_backlight(dev); |
370 | dev_priv->backlight_level = intel_panel_get_backlight(dev); |
372 | dev_priv->backlight_enabled = dev_priv->backlight_level != 0; |
371 | dev_priv->backlight_enabled = dev_priv->backlight_level != 0; |
373 | } |
372 | } |
374 | 373 | ||
375 | enum drm_connector_status |
374 | enum drm_connector_status |
376 | intel_panel_detect(struct drm_device *dev) |
375 | intel_panel_detect(struct drm_device *dev) |
377 | { |
376 | { |
378 | #if 0 |
377 | #if 0 |
379 | struct drm_i915_private *dev_priv = dev->dev_private; |
378 | struct drm_i915_private *dev_priv = dev->dev_private; |
380 | #endif |
379 | #endif |
381 | 380 | ||
382 | if (i915_panel_ignore_lid) |
381 | if (i915_panel_ignore_lid) |
383 | return i915_panel_ignore_lid > 0 ? |
382 | return i915_panel_ignore_lid > 0 ? |
384 | connector_status_connected : |
383 | connector_status_connected : |
385 | connector_status_disconnected; |
384 | connector_status_disconnected; |
386 | 385 | ||
387 | /* opregion lid state on HP 2540p is wrong at boot up, |
386 | /* opregion lid state on HP 2540p is wrong at boot up, |
388 | * appears to be either the BIOS or Linux ACPI fault */ |
387 | * appears to be either the BIOS or Linux ACPI fault */ |
389 | #if 0 |
388 | #if 0 |
390 | /* Assume that the BIOS does not lie through the OpRegion... */ |
389 | /* Assume that the BIOS does not lie through the OpRegion... */ |
391 | if (dev_priv->opregion.lid_state) |
390 | if (dev_priv->opregion.lid_state) |
392 | return ioread32(dev_priv->opregion.lid_state) & 0x1 ? |
391 | return ioread32(dev_priv->opregion.lid_state) & 0x1 ? |
393 | connector_status_connected : |
392 | connector_status_connected : |
394 | connector_status_disconnected; |
393 | connector_status_disconnected; |
395 | #endif |
394 | #endif |
396 | 395 | ||
397 | return connector_status_unknown; |
396 | return connector_status_unknown; |
398 | } |
397 | } |
399 | 398 | ||
400 | #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE |
399 | #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE |
401 | static int intel_panel_update_status(struct backlight_device *bd) |
400 | static int intel_panel_update_status(struct backlight_device *bd) |
402 | { |
401 | { |
403 | struct drm_device *dev = bl_get_data(bd); |
402 | struct drm_device *dev = bl_get_data(bd); |
404 | intel_panel_set_backlight(dev, bd->props.brightness); |
403 | intel_panel_set_backlight(dev, bd->props.brightness); |
405 | return 0; |
404 | return 0; |
406 | } |
405 | } |
407 | 406 | ||
408 | static int intel_panel_get_brightness(struct backlight_device *bd) |
407 | static int intel_panel_get_brightness(struct backlight_device *bd) |
409 | { |
408 | { |
410 | struct drm_device *dev = bl_get_data(bd); |
409 | struct drm_device *dev = bl_get_data(bd); |
411 | struct drm_i915_private *dev_priv = dev->dev_private; |
410 | struct drm_i915_private *dev_priv = dev->dev_private; |
412 | return dev_priv->backlight_level; |
411 | return dev_priv->backlight_level; |
413 | } |
412 | } |
414 | 413 | ||
415 | static const struct backlight_ops intel_panel_bl_ops = { |
414 | static const struct backlight_ops intel_panel_bl_ops = { |
416 | .update_status = intel_panel_update_status, |
415 | .update_status = intel_panel_update_status, |
417 | .get_brightness = intel_panel_get_brightness, |
416 | .get_brightness = intel_panel_get_brightness, |
418 | }; |
417 | }; |
419 | 418 | ||
420 | int intel_panel_setup_backlight(struct drm_device *dev) |
419 | int intel_panel_setup_backlight(struct drm_device *dev) |
421 | { |
420 | { |
422 | struct drm_i915_private *dev_priv = dev->dev_private; |
421 | struct drm_i915_private *dev_priv = dev->dev_private; |
423 | struct backlight_properties props; |
422 | struct backlight_properties props; |
424 | struct drm_connector *connector; |
423 | struct drm_connector *connector; |
425 | 424 | ||
426 | intel_panel_init_backlight(dev); |
425 | intel_panel_init_backlight(dev); |
427 | 426 | ||
428 | if (dev_priv->int_lvds_connector) |
427 | if (dev_priv->int_lvds_connector) |
429 | connector = dev_priv->int_lvds_connector; |
428 | connector = dev_priv->int_lvds_connector; |
430 | else if (dev_priv->int_edp_connector) |
429 | else if (dev_priv->int_edp_connector) |
431 | connector = dev_priv->int_edp_connector; |
430 | connector = dev_priv->int_edp_connector; |
432 | else |
431 | else |
433 | return -ENODEV; |
432 | return -ENODEV; |
434 | 433 | ||
435 | memset(&props, 0, sizeof(props)); |
434 | memset(&props, 0, sizeof(props)); |
436 | props.type = BACKLIGHT_RAW; |
435 | props.type = BACKLIGHT_RAW; |
437 | props.max_brightness = _intel_panel_get_max_backlight(dev); |
436 | props.max_brightness = _intel_panel_get_max_backlight(dev); |
438 | if (props.max_brightness == 0) { |
437 | if (props.max_brightness == 0) { |
439 | DRM_DEBUG_DRIVER("Failed to get maximum backlight value\n"); |
438 | DRM_DEBUG_DRIVER("Failed to get maximum backlight value\n"); |
440 | return -ENODEV; |
439 | return -ENODEV; |
441 | } |
440 | } |
442 | dev_priv->backlight = |
441 | dev_priv->backlight = |
443 | backlight_device_register("intel_backlight", |
442 | backlight_device_register("intel_backlight", |
444 | &connector->kdev, dev, |
443 | &connector->kdev, dev, |
445 | &intel_panel_bl_ops, &props); |
444 | &intel_panel_bl_ops, &props); |
446 | 445 | ||
447 | if (IS_ERR(dev_priv->backlight)) { |
446 | if (IS_ERR(dev_priv->backlight)) { |
448 | DRM_ERROR("Failed to register backlight: %ld\n", |
447 | DRM_ERROR("Failed to register backlight: %ld\n", |
449 | PTR_ERR(dev_priv->backlight)); |
448 | PTR_ERR(dev_priv->backlight)); |
450 | dev_priv->backlight = NULL; |
449 | dev_priv->backlight = NULL; |
451 | return -ENODEV; |
450 | return -ENODEV; |
452 | } |
451 | } |
453 | dev_priv->backlight->props.brightness = intel_panel_get_backlight(dev); |
452 | dev_priv->backlight->props.brightness = intel_panel_get_backlight(dev); |
454 | return 0; |
453 | return 0; |
455 | } |
454 | } |
456 | 455 | ||
457 | void intel_panel_destroy_backlight(struct drm_device *dev) |
456 | void intel_panel_destroy_backlight(struct drm_device *dev) |
458 | { |
457 | { |
459 | struct drm_i915_private *dev_priv = dev->dev_private; |
458 | struct drm_i915_private *dev_priv = dev->dev_private; |
460 | if (dev_priv->backlight) |
459 | if (dev_priv->backlight) |
461 | backlight_device_unregister(dev_priv->backlight); |
460 | backlight_device_unregister(dev_priv->backlight); |
462 | } |
461 | } |
463 | #else |
462 | #else |
464 | int intel_panel_setup_backlight(struct drm_device *dev) |
463 | int intel_panel_setup_backlight(struct drm_device *dev) |
465 | { |
464 | { |
466 | intel_panel_init_backlight(dev); |
465 | intel_panel_init_backlight(dev); |
467 | return 0; |
466 | return 0; |
468 | } |
467 | } |
469 | 468 | ||
470 | void intel_panel_destroy_backlight(struct drm_device *dev) |
469 | void intel_panel_destroy_backlight(struct drm_device *dev) |
471 | { |
470 | { |
472 | return; |
471 | return; |
473 | } |
472 | } |
474 | #endif=><=>>>>>><>><>> |
473 | #endif=><=>>>>>><>><>> |