1 /*
2 * Copyright © 2006-2010 Intel Corporation
3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
4 *
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:
11 *
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
14 * Software.
15 *
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.
23 *
24 * Authors:
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>
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 #include <dev/drm2/drmP.h>
35 #include <dev/drm2/drm.h>
36 #include <dev/drm2/i915/i915_drm.h>
37 #include <dev/drm2/i915/intel_drv.h>
38
39 #define PCI_LBPC 0xf4 /* legacy/combination backlight modes */
40
41 void
intel_fixed_panel_mode(struct drm_display_mode * fixed_mode,struct drm_display_mode * adjusted_mode)42 intel_fixed_panel_mode(struct drm_display_mode *fixed_mode,
43 struct drm_display_mode *adjusted_mode)
44 {
45 adjusted_mode->hdisplay = fixed_mode->hdisplay;
46 adjusted_mode->hsync_start = fixed_mode->hsync_start;
47 adjusted_mode->hsync_end = fixed_mode->hsync_end;
48 adjusted_mode->htotal = fixed_mode->htotal;
49
50 adjusted_mode->vdisplay = fixed_mode->vdisplay;
51 adjusted_mode->vsync_start = fixed_mode->vsync_start;
52 adjusted_mode->vsync_end = fixed_mode->vsync_end;
53 adjusted_mode->vtotal = fixed_mode->vtotal;
54
55 adjusted_mode->clock = fixed_mode->clock;
56 }
57
58 /* adjusted_mode has been preset to be the panel's fixed mode */
59 void
intel_pch_panel_fitting(struct drm_device * dev,int fitting_mode,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)60 intel_pch_panel_fitting(struct drm_device *dev,
61 int fitting_mode,
62 const struct drm_display_mode *mode,
63 struct drm_display_mode *adjusted_mode)
64 {
65 struct drm_i915_private *dev_priv = dev->dev_private;
66 int x, y, width, height;
67
68 x = y = width = height = 0;
69
70 /* Native modes don't need fitting */
71 if (adjusted_mode->hdisplay == mode->hdisplay &&
72 adjusted_mode->vdisplay == mode->vdisplay)
73 goto done;
74
75 switch (fitting_mode) {
76 case DRM_MODE_SCALE_CENTER:
77 width = mode->hdisplay;
78 height = mode->vdisplay;
79 x = (adjusted_mode->hdisplay - width + 1)/2;
80 y = (adjusted_mode->vdisplay - height + 1)/2;
81 break;
82
83 case DRM_MODE_SCALE_ASPECT:
84 /* Scale but preserve the aspect ratio */
85 {
86 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
87 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
88 if (scaled_width > scaled_height) { /* pillar */
89 width = scaled_height / mode->vdisplay;
90 if (width & 1)
91 width++;
92 x = (adjusted_mode->hdisplay - width + 1) / 2;
93 y = 0;
94 height = adjusted_mode->vdisplay;
95 } else if (scaled_width < scaled_height) { /* letter */
96 height = scaled_width / mode->hdisplay;
97 if (height & 1)
98 height++;
99 y = (adjusted_mode->vdisplay - height + 1) / 2;
100 x = 0;
101 width = adjusted_mode->hdisplay;
102 } else {
103 x = y = 0;
104 width = adjusted_mode->hdisplay;
105 height = adjusted_mode->vdisplay;
106 }
107 }
108 break;
109
110 default:
111 case DRM_MODE_SCALE_FULLSCREEN:
112 x = y = 0;
113 width = adjusted_mode->hdisplay;
114 height = adjusted_mode->vdisplay;
115 break;
116 }
117
118 done:
119 dev_priv->pch_pf_pos = (x << 16) | y;
120 dev_priv->pch_pf_size = (width << 16) | height;
121 }
122
is_backlight_combination_mode(struct drm_device * dev)123 static int is_backlight_combination_mode(struct drm_device *dev)
124 {
125 struct drm_i915_private *dev_priv = dev->dev_private;
126
127 if (INTEL_INFO(dev)->gen >= 4)
128 return I915_READ(BLC_PWM_CTL2) & BLM_COMBINATION_MODE;
129
130 if (IS_GEN2(dev))
131 return I915_READ(BLC_PWM_CTL) & BLM_LEGACY_MODE;
132
133 return 0;
134 }
135
i915_read_blc_pwm_ctl(struct drm_i915_private * dev_priv)136 static u32 i915_read_blc_pwm_ctl(struct drm_i915_private *dev_priv)
137 {
138 u32 val;
139
140 /* Restore the CTL value if it lost, e.g. GPU reset */
141
142 if (HAS_PCH_SPLIT(dev_priv->dev)) {
143 val = I915_READ(BLC_PWM_PCH_CTL2);
144 if (dev_priv->saveBLC_PWM_CTL2 == 0) {
145 dev_priv->saveBLC_PWM_CTL2 = val;
146 } else if (val == 0) {
147 I915_WRITE(BLC_PWM_PCH_CTL2,
148 dev_priv->saveBLC_PWM_CTL2);
149 val = dev_priv->saveBLC_PWM_CTL2;
150 }
151 } else {
152 val = I915_READ(BLC_PWM_CTL);
153 if (dev_priv->saveBLC_PWM_CTL == 0) {
154 dev_priv->saveBLC_PWM_CTL = val;
155 dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
156 } else if (val == 0) {
157 I915_WRITE(BLC_PWM_CTL,
158 dev_priv->saveBLC_PWM_CTL);
159 I915_WRITE(BLC_PWM_CTL2,
160 dev_priv->saveBLC_PWM_CTL2);
161 val = dev_priv->saveBLC_PWM_CTL;
162 }
163 }
164
165 return val;
166 }
167
intel_panel_get_max_backlight(struct drm_device * dev)168 u32 intel_panel_get_max_backlight(struct drm_device *dev)
169 {
170 struct drm_i915_private *dev_priv = dev->dev_private;
171 u32 max;
172
173 max = i915_read_blc_pwm_ctl(dev_priv);
174 if (max == 0) {
175 /* XXX add code here to query mode clock or hardware clock
176 * and program max PWM appropriately.
177 */
178 #if 0
179 printf("fixme: max PWM is zero.\n");
180 #endif
181 return 1;
182 }
183
184 if (HAS_PCH_SPLIT(dev)) {
185 max >>= 16;
186 } else {
187 if (INTEL_INFO(dev)->gen < 4)
188 max >>= 17;
189 else
190 max >>= 16;
191
192 if (is_backlight_combination_mode(dev))
193 max *= 0xff;
194 }
195
196 DRM_DEBUG("max backlight PWM = %d\n", max);
197 return max;
198 }
199
intel_panel_compute_brightness(struct drm_device * dev,u32 val)200 static u32 intel_panel_compute_brightness(struct drm_device *dev, u32 val)
201 {
202 struct drm_i915_private *dev_priv = dev->dev_private;
203
204 if (i915_panel_invert_brightness < 0)
205 return val;
206
207 if (i915_panel_invert_brightness > 0 ||
208 dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS)
209 return intel_panel_get_max_backlight(dev) - val;
210
211 return val;
212 }
213
intel_panel_get_backlight(struct drm_device * dev)214 u32 intel_panel_get_backlight(struct drm_device *dev)
215 {
216 struct drm_i915_private *dev_priv = dev->dev_private;
217 u32 val;
218
219 if (HAS_PCH_SPLIT(dev)) {
220 val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
221 } else {
222 val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
223 if (INTEL_INFO(dev)->gen < 4)
224 val >>= 1;
225
226 if (is_backlight_combination_mode(dev)) {
227 u8 lbpc;
228
229 lbpc = pci_read_config(dev->dev, PCI_LBPC, 1);
230 val *= lbpc;
231 }
232 }
233
234 val = intel_panel_compute_brightness(dev, val);
235 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
236 return val;
237 }
238
intel_pch_panel_set_backlight(struct drm_device * dev,u32 level)239 static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level)
240 {
241 struct drm_i915_private *dev_priv = dev->dev_private;
242 u32 val = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
243 I915_WRITE(BLC_PWM_CPU_CTL, val | level);
244 }
245
intel_panel_actually_set_backlight(struct drm_device * dev,u32 level)246 static void intel_panel_actually_set_backlight(struct drm_device *dev, u32 level)
247 {
248 struct drm_i915_private *dev_priv = dev->dev_private;
249 u32 tmp;
250
251 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
252 level = intel_panel_compute_brightness(dev, level);
253
254 if (HAS_PCH_SPLIT(dev))
255 return intel_pch_panel_set_backlight(dev, level);
256
257 if (is_backlight_combination_mode(dev)) {
258 u32 max = intel_panel_get_max_backlight(dev);
259 u8 lbpc;
260
261 lbpc = level * 0xfe / max + 1;
262 level /= lbpc;
263 pci_write_config(dev->dev, PCI_LBPC, lbpc, 4);
264 }
265
266 tmp = I915_READ(BLC_PWM_CTL);
267 if (INTEL_INFO(dev)->gen < 4)
268 level <<= 1;
269 tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK;
270 I915_WRITE(BLC_PWM_CTL, tmp | level);
271 }
272
intel_panel_set_backlight(struct drm_device * dev,u32 level)273 void intel_panel_set_backlight(struct drm_device *dev, u32 level)
274 {
275 struct drm_i915_private *dev_priv = dev->dev_private;
276
277 dev_priv->backlight_level = level;
278 if (dev_priv->backlight_enabled)
279 intel_panel_actually_set_backlight(dev, level);
280 }
281
intel_panel_disable_backlight(struct drm_device * dev)282 void intel_panel_disable_backlight(struct drm_device *dev)
283 {
284 struct drm_i915_private *dev_priv = dev->dev_private;
285
286 dev_priv->backlight_enabled = false;
287 intel_panel_actually_set_backlight(dev, 0);
288 }
289
intel_panel_enable_backlight(struct drm_device * dev)290 void intel_panel_enable_backlight(struct drm_device *dev)
291 {
292 struct drm_i915_private *dev_priv = dev->dev_private;
293
294 if (dev_priv->backlight_level == 0)
295 dev_priv->backlight_level = intel_panel_get_max_backlight(dev);
296
297 dev_priv->backlight_enabled = true;
298 intel_panel_actually_set_backlight(dev, dev_priv->backlight_level);
299 }
300
intel_panel_init_backlight(struct drm_device * dev)301 static void intel_panel_init_backlight(struct drm_device *dev)
302 {
303 struct drm_i915_private *dev_priv = dev->dev_private;
304
305 dev_priv->backlight_level = intel_panel_get_backlight(dev);
306 dev_priv->backlight_enabled = dev_priv->backlight_level != 0;
307 }
308
309 enum drm_connector_status
intel_panel_detect(struct drm_device * dev)310 intel_panel_detect(struct drm_device *dev)
311 {
312 #if 0
313 struct drm_i915_private *dev_priv = dev->dev_private;
314 #endif
315
316 if (i915_panel_ignore_lid)
317 return i915_panel_ignore_lid > 0 ?
318 connector_status_connected :
319 connector_status_disconnected;
320
321 /* opregion lid state on HP 2540p is wrong at boot up,
322 * appears to be either the BIOS or Linux ACPI fault */
323 #if 0
324 /* Assume that the BIOS does not lie through the OpRegion... */
325 if (dev_priv->opregion.lid_state)
326 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
327 connector_status_connected :
328 connector_status_disconnected;
329 #endif
330
331 return connector_status_unknown;
332 }
333
intel_panel_setup_backlight(struct drm_device * dev)334 int intel_panel_setup_backlight(struct drm_device *dev)
335 {
336 intel_panel_init_backlight(dev);
337 return 0;
338 }
339
intel_panel_destroy_backlight(struct drm_device * dev)340 void intel_panel_destroy_backlight(struct drm_device *dev)
341 {
342 return;
343 }
344