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1d8e1c75 CW |
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 | ||
a70491cc JP |
31 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
32 | ||
7bd90909 | 33 | #include <linux/moduleparam.h> |
1d8e1c75 CW |
34 | #include "intel_drv.h" |
35 | ||
ba3820ad TI |
36 | #define PCI_LBPC 0xf4 /* legacy/combination backlight modes */ |
37 | ||
1d8e1c75 | 38 | void |
4c6df4b4 | 39 | intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode, |
1d8e1c75 CW |
40 | struct drm_display_mode *adjusted_mode) |
41 | { | |
4c6df4b4 | 42 | drm_mode_copy(adjusted_mode, fixed_mode); |
a52690e4 ID |
43 | |
44 | drm_mode_set_crtcinfo(adjusted_mode, 0); | |
1d8e1c75 CW |
45 | } |
46 | ||
47 | /* adjusted_mode has been preset to be the panel's fixed mode */ | |
48 | void | |
b074cec8 JB |
49 | intel_pch_panel_fitting(struct intel_crtc *intel_crtc, |
50 | struct intel_crtc_config *pipe_config, | |
51 | int fitting_mode) | |
1d8e1c75 | 52 | { |
37327abd | 53 | struct drm_display_mode *adjusted_mode; |
1d8e1c75 CW |
54 | int x, y, width, height; |
55 | ||
b074cec8 JB |
56 | adjusted_mode = &pipe_config->adjusted_mode; |
57 | ||
1d8e1c75 CW |
58 | x = y = width = height = 0; |
59 | ||
60 | /* Native modes don't need fitting */ | |
37327abd VS |
61 | if (adjusted_mode->hdisplay == pipe_config->pipe_src_w && |
62 | adjusted_mode->vdisplay == pipe_config->pipe_src_h) | |
1d8e1c75 CW |
63 | goto done; |
64 | ||
65 | switch (fitting_mode) { | |
66 | case DRM_MODE_SCALE_CENTER: | |
37327abd VS |
67 | width = pipe_config->pipe_src_w; |
68 | height = pipe_config->pipe_src_h; | |
1d8e1c75 CW |
69 | x = (adjusted_mode->hdisplay - width + 1)/2; |
70 | y = (adjusted_mode->vdisplay - height + 1)/2; | |
71 | break; | |
72 | ||
73 | case DRM_MODE_SCALE_ASPECT: | |
74 | /* Scale but preserve the aspect ratio */ | |
75 | { | |
9084e7d2 DV |
76 | u32 scaled_width = adjusted_mode->hdisplay |
77 | * pipe_config->pipe_src_h; | |
78 | u32 scaled_height = pipe_config->pipe_src_w | |
79 | * adjusted_mode->vdisplay; | |
1d8e1c75 | 80 | if (scaled_width > scaled_height) { /* pillar */ |
37327abd | 81 | width = scaled_height / pipe_config->pipe_src_h; |
302983e9 | 82 | if (width & 1) |
0206e353 | 83 | width++; |
1d8e1c75 CW |
84 | x = (adjusted_mode->hdisplay - width + 1) / 2; |
85 | y = 0; | |
86 | height = adjusted_mode->vdisplay; | |
87 | } else if (scaled_width < scaled_height) { /* letter */ | |
37327abd | 88 | height = scaled_width / pipe_config->pipe_src_w; |
302983e9 AJ |
89 | if (height & 1) |
90 | height++; | |
1d8e1c75 CW |
91 | y = (adjusted_mode->vdisplay - height + 1) / 2; |
92 | x = 0; | |
93 | width = adjusted_mode->hdisplay; | |
94 | } else { | |
95 | x = y = 0; | |
96 | width = adjusted_mode->hdisplay; | |
97 | height = adjusted_mode->vdisplay; | |
98 | } | |
99 | } | |
100 | break; | |
101 | ||
1d8e1c75 CW |
102 | case DRM_MODE_SCALE_FULLSCREEN: |
103 | x = y = 0; | |
104 | width = adjusted_mode->hdisplay; | |
105 | height = adjusted_mode->vdisplay; | |
106 | break; | |
ab3e67f4 JB |
107 | |
108 | default: | |
109 | WARN(1, "bad panel fit mode: %d\n", fitting_mode); | |
110 | return; | |
1d8e1c75 CW |
111 | } |
112 | ||
113 | done: | |
b074cec8 JB |
114 | pipe_config->pch_pfit.pos = (x << 16) | y; |
115 | pipe_config->pch_pfit.size = (width << 16) | height; | |
fd4daa9c | 116 | pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0; |
1d8e1c75 | 117 | } |
a9573556 | 118 | |
2dd24552 JB |
119 | static void |
120 | centre_horizontally(struct drm_display_mode *mode, | |
121 | int width) | |
122 | { | |
123 | u32 border, sync_pos, blank_width, sync_width; | |
124 | ||
125 | /* keep the hsync and hblank widths constant */ | |
126 | sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start; | |
127 | blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start; | |
128 | sync_pos = (blank_width - sync_width + 1) / 2; | |
129 | ||
130 | border = (mode->hdisplay - width + 1) / 2; | |
131 | border += border & 1; /* make the border even */ | |
132 | ||
133 | mode->crtc_hdisplay = width; | |
134 | mode->crtc_hblank_start = width + border; | |
135 | mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width; | |
136 | ||
137 | mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos; | |
138 | mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width; | |
139 | } | |
140 | ||
141 | static void | |
142 | centre_vertically(struct drm_display_mode *mode, | |
143 | int height) | |
144 | { | |
145 | u32 border, sync_pos, blank_width, sync_width; | |
146 | ||
147 | /* keep the vsync and vblank widths constant */ | |
148 | sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start; | |
149 | blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start; | |
150 | sync_pos = (blank_width - sync_width + 1) / 2; | |
151 | ||
152 | border = (mode->vdisplay - height + 1) / 2; | |
153 | ||
154 | mode->crtc_vdisplay = height; | |
155 | mode->crtc_vblank_start = height + border; | |
156 | mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width; | |
157 | ||
158 | mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos; | |
159 | mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width; | |
160 | } | |
161 | ||
162 | static inline u32 panel_fitter_scaling(u32 source, u32 target) | |
163 | { | |
164 | /* | |
165 | * Floating point operation is not supported. So the FACTOR | |
166 | * is defined, which can avoid the floating point computation | |
167 | * when calculating the panel ratio. | |
168 | */ | |
169 | #define ACCURACY 12 | |
170 | #define FACTOR (1 << ACCURACY) | |
171 | u32 ratio = source * FACTOR / target; | |
172 | return (FACTOR * ratio + FACTOR/2) / FACTOR; | |
173 | } | |
174 | ||
9084e7d2 DV |
175 | static void i965_scale_aspect(struct intel_crtc_config *pipe_config, |
176 | u32 *pfit_control) | |
177 | { | |
178 | struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode; | |
179 | u32 scaled_width = adjusted_mode->hdisplay * | |
180 | pipe_config->pipe_src_h; | |
181 | u32 scaled_height = pipe_config->pipe_src_w * | |
182 | adjusted_mode->vdisplay; | |
183 | ||
184 | /* 965+ is easy, it does everything in hw */ | |
185 | if (scaled_width > scaled_height) | |
186 | *pfit_control |= PFIT_ENABLE | | |
187 | PFIT_SCALING_PILLAR; | |
188 | else if (scaled_width < scaled_height) | |
189 | *pfit_control |= PFIT_ENABLE | | |
190 | PFIT_SCALING_LETTER; | |
191 | else if (adjusted_mode->hdisplay != pipe_config->pipe_src_w) | |
192 | *pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO; | |
193 | } | |
194 | ||
195 | static void i9xx_scale_aspect(struct intel_crtc_config *pipe_config, | |
196 | u32 *pfit_control, u32 *pfit_pgm_ratios, | |
197 | u32 *border) | |
198 | { | |
199 | struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode; | |
200 | u32 scaled_width = adjusted_mode->hdisplay * | |
201 | pipe_config->pipe_src_h; | |
202 | u32 scaled_height = pipe_config->pipe_src_w * | |
203 | adjusted_mode->vdisplay; | |
204 | u32 bits; | |
205 | ||
206 | /* | |
207 | * For earlier chips we have to calculate the scaling | |
208 | * ratio by hand and program it into the | |
209 | * PFIT_PGM_RATIO register | |
210 | */ | |
211 | if (scaled_width > scaled_height) { /* pillar */ | |
212 | centre_horizontally(adjusted_mode, | |
213 | scaled_height / | |
214 | pipe_config->pipe_src_h); | |
215 | ||
216 | *border = LVDS_BORDER_ENABLE; | |
217 | if (pipe_config->pipe_src_h != adjusted_mode->vdisplay) { | |
218 | bits = panel_fitter_scaling(pipe_config->pipe_src_h, | |
219 | adjusted_mode->vdisplay); | |
220 | ||
221 | *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | | |
222 | bits << PFIT_VERT_SCALE_SHIFT); | |
223 | *pfit_control |= (PFIT_ENABLE | | |
224 | VERT_INTERP_BILINEAR | | |
225 | HORIZ_INTERP_BILINEAR); | |
226 | } | |
227 | } else if (scaled_width < scaled_height) { /* letter */ | |
228 | centre_vertically(adjusted_mode, | |
229 | scaled_width / | |
230 | pipe_config->pipe_src_w); | |
231 | ||
232 | *border = LVDS_BORDER_ENABLE; | |
233 | if (pipe_config->pipe_src_w != adjusted_mode->hdisplay) { | |
234 | bits = panel_fitter_scaling(pipe_config->pipe_src_w, | |
235 | adjusted_mode->hdisplay); | |
236 | ||
237 | *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | | |
238 | bits << PFIT_VERT_SCALE_SHIFT); | |
239 | *pfit_control |= (PFIT_ENABLE | | |
240 | VERT_INTERP_BILINEAR | | |
241 | HORIZ_INTERP_BILINEAR); | |
242 | } | |
243 | } else { | |
244 | /* Aspects match, Let hw scale both directions */ | |
245 | *pfit_control |= (PFIT_ENABLE | | |
246 | VERT_AUTO_SCALE | HORIZ_AUTO_SCALE | | |
247 | VERT_INTERP_BILINEAR | | |
248 | HORIZ_INTERP_BILINEAR); | |
249 | } | |
250 | } | |
251 | ||
2dd24552 JB |
252 | void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc, |
253 | struct intel_crtc_config *pipe_config, | |
254 | int fitting_mode) | |
255 | { | |
256 | struct drm_device *dev = intel_crtc->base.dev; | |
2dd24552 | 257 | u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0; |
37327abd | 258 | struct drm_display_mode *adjusted_mode; |
2dd24552 | 259 | |
2dd24552 JB |
260 | adjusted_mode = &pipe_config->adjusted_mode; |
261 | ||
262 | /* Native modes don't need fitting */ | |
37327abd VS |
263 | if (adjusted_mode->hdisplay == pipe_config->pipe_src_w && |
264 | adjusted_mode->vdisplay == pipe_config->pipe_src_h) | |
2dd24552 JB |
265 | goto out; |
266 | ||
267 | switch (fitting_mode) { | |
268 | case DRM_MODE_SCALE_CENTER: | |
269 | /* | |
270 | * For centered modes, we have to calculate border widths & | |
271 | * heights and modify the values programmed into the CRTC. | |
272 | */ | |
37327abd VS |
273 | centre_horizontally(adjusted_mode, pipe_config->pipe_src_w); |
274 | centre_vertically(adjusted_mode, pipe_config->pipe_src_h); | |
2dd24552 JB |
275 | border = LVDS_BORDER_ENABLE; |
276 | break; | |
277 | case DRM_MODE_SCALE_ASPECT: | |
278 | /* Scale but preserve the aspect ratio */ | |
9084e7d2 DV |
279 | if (INTEL_INFO(dev)->gen >= 4) |
280 | i965_scale_aspect(pipe_config, &pfit_control); | |
281 | else | |
282 | i9xx_scale_aspect(pipe_config, &pfit_control, | |
283 | &pfit_pgm_ratios, &border); | |
2dd24552 | 284 | break; |
2dd24552 JB |
285 | case DRM_MODE_SCALE_FULLSCREEN: |
286 | /* | |
287 | * Full scaling, even if it changes the aspect ratio. | |
288 | * Fortunately this is all done for us in hw. | |
289 | */ | |
37327abd VS |
290 | if (pipe_config->pipe_src_h != adjusted_mode->vdisplay || |
291 | pipe_config->pipe_src_w != adjusted_mode->hdisplay) { | |
2dd24552 JB |
292 | pfit_control |= PFIT_ENABLE; |
293 | if (INTEL_INFO(dev)->gen >= 4) | |
294 | pfit_control |= PFIT_SCALING_AUTO; | |
295 | else | |
296 | pfit_control |= (VERT_AUTO_SCALE | | |
297 | VERT_INTERP_BILINEAR | | |
298 | HORIZ_AUTO_SCALE | | |
299 | HORIZ_INTERP_BILINEAR); | |
300 | } | |
301 | break; | |
ab3e67f4 JB |
302 | default: |
303 | WARN(1, "bad panel fit mode: %d\n", fitting_mode); | |
304 | return; | |
2dd24552 JB |
305 | } |
306 | ||
307 | /* 965+ wants fuzzy fitting */ | |
308 | /* FIXME: handle multiple panels by failing gracefully */ | |
309 | if (INTEL_INFO(dev)->gen >= 4) | |
310 | pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) | | |
311 | PFIT_FILTER_FUZZY); | |
312 | ||
313 | out: | |
314 | if ((pfit_control & PFIT_ENABLE) == 0) { | |
315 | pfit_control = 0; | |
316 | pfit_pgm_ratios = 0; | |
317 | } | |
318 | ||
319 | /* Make sure pre-965 set dither correctly for 18bpp panels. */ | |
320 | if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18) | |
321 | pfit_control |= PANEL_8TO6_DITHER_ENABLE; | |
322 | ||
2deefda5 DV |
323 | pipe_config->gmch_pfit.control = pfit_control; |
324 | pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios; | |
68fc8742 | 325 | pipe_config->gmch_pfit.lvds_border_bits = border; |
2dd24552 JB |
326 | } |
327 | ||
ba3820ad TI |
328 | static int is_backlight_combination_mode(struct drm_device *dev) |
329 | { | |
330 | struct drm_i915_private *dev_priv = dev->dev_private; | |
331 | ||
d9c638d5 | 332 | if (IS_GEN4(dev)) |
ba3820ad TI |
333 | return I915_READ(BLC_PWM_CTL2) & BLM_COMBINATION_MODE; |
334 | ||
335 | if (IS_GEN2(dev)) | |
336 | return I915_READ(BLC_PWM_CTL) & BLM_LEGACY_MODE; | |
337 | ||
338 | return 0; | |
339 | } | |
340 | ||
d6540632 JN |
341 | /* XXX: query mode clock or hardware clock and program max PWM appropriately |
342 | * when it's 0. | |
343 | */ | |
752aa88a | 344 | static u32 i915_read_blc_pwm_ctl(struct drm_device *dev, enum pipe pipe) |
0b0b053a | 345 | { |
bfd7590d | 346 | struct drm_i915_private *dev_priv = dev->dev_private; |
0b0b053a CW |
347 | u32 val; |
348 | ||
df0a6797 | 349 | WARN_ON_SMP(!spin_is_locked(&dev_priv->backlight.lock)); |
8ba2d185 | 350 | |
0b0b053a CW |
351 | /* Restore the CTL value if it lost, e.g. GPU reset */ |
352 | ||
353 | if (HAS_PCH_SPLIT(dev_priv->dev)) { | |
354 | val = I915_READ(BLC_PWM_PCH_CTL2); | |
f4c956ad DV |
355 | if (dev_priv->regfile.saveBLC_PWM_CTL2 == 0) { |
356 | dev_priv->regfile.saveBLC_PWM_CTL2 = val; | |
0b0b053a | 357 | } else if (val == 0) { |
f4c956ad | 358 | val = dev_priv->regfile.saveBLC_PWM_CTL2; |
bfd7590d | 359 | I915_WRITE(BLC_PWM_PCH_CTL2, val); |
0b0b053a | 360 | } |
07bf139b JB |
361 | } else if (IS_VALLEYVIEW(dev)) { |
362 | val = I915_READ(VLV_BLC_PWM_CTL(pipe)); | |
363 | if (dev_priv->regfile.saveBLC_PWM_CTL == 0) { | |
364 | dev_priv->regfile.saveBLC_PWM_CTL = val; | |
365 | dev_priv->regfile.saveBLC_PWM_CTL2 = | |
366 | I915_READ(VLV_BLC_PWM_CTL2(pipe)); | |
367 | } else if (val == 0) { | |
368 | val = dev_priv->regfile.saveBLC_PWM_CTL; | |
369 | I915_WRITE(VLV_BLC_PWM_CTL(pipe), val); | |
370 | I915_WRITE(VLV_BLC_PWM_CTL2(pipe), | |
371 | dev_priv->regfile.saveBLC_PWM_CTL2); | |
372 | } | |
373 | ||
374 | if (!val) | |
375 | val = 0x0f42ffff; | |
0b0b053a CW |
376 | } else { |
377 | val = I915_READ(BLC_PWM_CTL); | |
f4c956ad DV |
378 | if (dev_priv->regfile.saveBLC_PWM_CTL == 0) { |
379 | dev_priv->regfile.saveBLC_PWM_CTL = val; | |
bfd7590d JN |
380 | if (INTEL_INFO(dev)->gen >= 4) |
381 | dev_priv->regfile.saveBLC_PWM_CTL2 = | |
382 | I915_READ(BLC_PWM_CTL2); | |
0b0b053a | 383 | } else if (val == 0) { |
f4c956ad | 384 | val = dev_priv->regfile.saveBLC_PWM_CTL; |
bfd7590d JN |
385 | I915_WRITE(BLC_PWM_CTL, val); |
386 | if (INTEL_INFO(dev)->gen >= 4) | |
387 | I915_WRITE(BLC_PWM_CTL2, | |
388 | dev_priv->regfile.saveBLC_PWM_CTL2); | |
0b0b053a CW |
389 | } |
390 | } | |
391 | ||
392 | return val; | |
393 | } | |
394 | ||
752aa88a JB |
395 | static u32 intel_panel_get_max_backlight(struct drm_device *dev, |
396 | enum pipe pipe) | |
a9573556 | 397 | { |
a9573556 CW |
398 | u32 max; |
399 | ||
752aa88a | 400 | max = i915_read_blc_pwm_ctl(dev, pipe); |
0b0b053a | 401 | |
a9573556 | 402 | if (HAS_PCH_SPLIT(dev)) { |
0b0b053a | 403 | max >>= 16; |
a9573556 | 404 | } else { |
ca88479c | 405 | if (INTEL_INFO(dev)->gen < 4) |
a9573556 | 406 | max >>= 17; |
ca88479c | 407 | else |
a9573556 | 408 | max >>= 16; |
ba3820ad TI |
409 | |
410 | if (is_backlight_combination_mode(dev)) | |
411 | max *= 0xff; | |
a9573556 CW |
412 | } |
413 | ||
a9573556 | 414 | DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max); |
d6540632 | 415 | |
a9573556 CW |
416 | return max; |
417 | } | |
418 | ||
4dca20ef CE |
419 | static int i915_panel_invert_brightness; |
420 | MODULE_PARM_DESC(invert_brightness, "Invert backlight brightness " | |
421 | "(-1 force normal, 0 machine defaults, 1 force inversion), please " | |
7bd90909 CE |
422 | "report PCI device ID, subsystem vendor and subsystem device ID " |
423 | "to dri-devel@lists.freedesktop.org, if your machine needs it. " | |
424 | "It will then be included in an upcoming module version."); | |
4dca20ef | 425 | module_param_named(invert_brightness, i915_panel_invert_brightness, int, 0600); |
752aa88a JB |
426 | static u32 intel_panel_compute_brightness(struct drm_device *dev, |
427 | enum pipe pipe, u32 val) | |
7bd90909 | 428 | { |
4dca20ef CE |
429 | struct drm_i915_private *dev_priv = dev->dev_private; |
430 | ||
431 | if (i915_panel_invert_brightness < 0) | |
432 | return val; | |
433 | ||
434 | if (i915_panel_invert_brightness > 0 || | |
d6540632 | 435 | dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) { |
752aa88a | 436 | u32 max = intel_panel_get_max_backlight(dev, pipe); |
d6540632 JN |
437 | if (max) |
438 | return max - val; | |
439 | } | |
7bd90909 CE |
440 | |
441 | return val; | |
442 | } | |
443 | ||
752aa88a JB |
444 | static u32 intel_panel_get_backlight(struct drm_device *dev, |
445 | enum pipe pipe) | |
a9573556 CW |
446 | { |
447 | struct drm_i915_private *dev_priv = dev->dev_private; | |
448 | u32 val; | |
8ba2d185 | 449 | unsigned long flags; |
07bf139b | 450 | int reg; |
8ba2d185 JN |
451 | |
452 | spin_lock_irqsave(&dev_priv->backlight.lock, flags); | |
a9573556 | 453 | |
f8e10062 BW |
454 | if (IS_BROADWELL(dev)) { |
455 | val = I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK; | |
456 | } else if (HAS_PCH_SPLIT(dev)) { | |
a9573556 CW |
457 | val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; |
458 | } else { | |
07bf139b JB |
459 | if (IS_VALLEYVIEW(dev)) |
460 | reg = VLV_BLC_PWM_CTL(pipe); | |
461 | else | |
462 | reg = BLC_PWM_CTL; | |
463 | ||
464 | val = I915_READ(reg) & BACKLIGHT_DUTY_CYCLE_MASK; | |
ca88479c | 465 | if (INTEL_INFO(dev)->gen < 4) |
a9573556 | 466 | val >>= 1; |
ba3820ad | 467 | |
0206e353 | 468 | if (is_backlight_combination_mode(dev)) { |
ba3820ad TI |
469 | u8 lbpc; |
470 | ||
ba3820ad TI |
471 | pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc); |
472 | val *= lbpc; | |
473 | } | |
a9573556 CW |
474 | } |
475 | ||
752aa88a | 476 | val = intel_panel_compute_brightness(dev, pipe, val); |
8ba2d185 JN |
477 | |
478 | spin_unlock_irqrestore(&dev_priv->backlight.lock, flags); | |
479 | ||
a9573556 CW |
480 | DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val); |
481 | return val; | |
482 | } | |
483 | ||
f8e10062 BW |
484 | static void intel_bdw_panel_set_backlight(struct drm_device *dev, u32 level) |
485 | { | |
486 | struct drm_i915_private *dev_priv = dev->dev_private; | |
487 | u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK; | |
488 | I915_WRITE(BLC_PWM_PCH_CTL2, val | level); | |
489 | } | |
490 | ||
a9573556 CW |
491 | static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level) |
492 | { | |
493 | struct drm_i915_private *dev_priv = dev->dev_private; | |
494 | u32 val = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; | |
495 | I915_WRITE(BLC_PWM_CPU_CTL, val | level); | |
496 | } | |
497 | ||
9084e7d2 | 498 | static void intel_panel_actually_set_backlight(struct drm_device *dev, |
752aa88a | 499 | enum pipe pipe, u32 level) |
a9573556 CW |
500 | { |
501 | struct drm_i915_private *dev_priv = dev->dev_private; | |
502 | u32 tmp; | |
07bf139b | 503 | int reg; |
a9573556 CW |
504 | |
505 | DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level); | |
752aa88a | 506 | level = intel_panel_compute_brightness(dev, pipe, level); |
a9573556 | 507 | |
f8e10062 BW |
508 | if (IS_BROADWELL(dev)) |
509 | return intel_bdw_panel_set_backlight(dev, level); | |
510 | else if (HAS_PCH_SPLIT(dev)) | |
a9573556 | 511 | return intel_pch_panel_set_backlight(dev, level); |
ba3820ad | 512 | |
0206e353 | 513 | if (is_backlight_combination_mode(dev)) { |
752aa88a | 514 | u32 max = intel_panel_get_max_backlight(dev, pipe); |
ba3820ad TI |
515 | u8 lbpc; |
516 | ||
d6540632 JN |
517 | /* we're screwed, but keep behaviour backwards compatible */ |
518 | if (!max) | |
519 | max = 1; | |
520 | ||
ba3820ad TI |
521 | lbpc = level * 0xfe / max + 1; |
522 | level /= lbpc; | |
523 | pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc); | |
524 | } | |
525 | ||
07bf139b JB |
526 | if (IS_VALLEYVIEW(dev)) |
527 | reg = VLV_BLC_PWM_CTL(pipe); | |
528 | else | |
529 | reg = BLC_PWM_CTL; | |
530 | ||
531 | tmp = I915_READ(reg); | |
a726915c | 532 | if (INTEL_INFO(dev)->gen < 4) |
a9573556 | 533 | level <<= 1; |
ca88479c | 534 | tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK; |
07bf139b | 535 | I915_WRITE(reg, tmp | level); |
a9573556 | 536 | } |
47356eb6 | 537 | |
d6540632 | 538 | /* set backlight brightness to level in range [0..max] */ |
752aa88a JB |
539 | void intel_panel_set_backlight(struct intel_connector *connector, u32 level, |
540 | u32 max) | |
47356eb6 | 541 | { |
752aa88a | 542 | struct drm_device *dev = connector->base.dev; |
47356eb6 | 543 | struct drm_i915_private *dev_priv = dev->dev_private; |
752aa88a | 544 | enum pipe pipe = intel_get_pipe_from_connector(connector); |
d6540632 | 545 | u32 freq; |
8ba2d185 JN |
546 | unsigned long flags; |
547 | ||
752aa88a JB |
548 | if (pipe == INVALID_PIPE) |
549 | return; | |
550 | ||
8ba2d185 | 551 | spin_lock_irqsave(&dev_priv->backlight.lock, flags); |
d6540632 | 552 | |
752aa88a | 553 | freq = intel_panel_get_max_backlight(dev, pipe); |
d6540632 JN |
554 | if (!freq) { |
555 | /* we are screwed, bail out */ | |
8ba2d185 | 556 | goto out; |
d6540632 JN |
557 | } |
558 | ||
22505b82 AL |
559 | /* scale to hardware, but be careful to not overflow */ |
560 | if (freq < max) | |
561 | level = level * freq / max; | |
562 | else | |
563 | level = freq / max * level; | |
47356eb6 | 564 | |
31ad8ec6 JN |
565 | dev_priv->backlight.level = level; |
566 | if (dev_priv->backlight.device) | |
567 | dev_priv->backlight.device->props.brightness = level; | |
b6b3ba5b | 568 | |
31ad8ec6 | 569 | if (dev_priv->backlight.enabled) |
752aa88a | 570 | intel_panel_actually_set_backlight(dev, pipe, level); |
8ba2d185 JN |
571 | out: |
572 | spin_unlock_irqrestore(&dev_priv->backlight.lock, flags); | |
f52c619a TI |
573 | } |
574 | ||
752aa88a | 575 | void intel_panel_disable_backlight(struct intel_connector *connector) |
f52c619a | 576 | { |
752aa88a | 577 | struct drm_device *dev = connector->base.dev; |
f52c619a | 578 | struct drm_i915_private *dev_priv = dev->dev_private; |
752aa88a | 579 | enum pipe pipe = intel_get_pipe_from_connector(connector); |
8ba2d185 JN |
580 | unsigned long flags; |
581 | ||
752aa88a JB |
582 | if (pipe == INVALID_PIPE) |
583 | return; | |
584 | ||
3f577573 JN |
585 | /* |
586 | * Do not disable backlight on the vgaswitcheroo path. When switching | |
587 | * away from i915, the other client may depend on i915 to handle the | |
588 | * backlight. This will leave the backlight on unnecessarily when | |
589 | * another client is not activated. | |
590 | */ | |
591 | if (dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) { | |
592 | DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n"); | |
593 | return; | |
594 | } | |
595 | ||
8ba2d185 | 596 | spin_lock_irqsave(&dev_priv->backlight.lock, flags); |
47356eb6 | 597 | |
31ad8ec6 | 598 | dev_priv->backlight.enabled = false; |
752aa88a | 599 | intel_panel_actually_set_backlight(dev, pipe, 0); |
24ded204 DV |
600 | |
601 | if (INTEL_INFO(dev)->gen >= 4) { | |
a4f32fc3 | 602 | uint32_t reg, tmp; |
24ded204 | 603 | |
07bf139b JB |
604 | if (HAS_PCH_SPLIT(dev)) |
605 | reg = BLC_PWM_CPU_CTL2; | |
606 | else if (IS_VALLEYVIEW(dev)) | |
607 | reg = VLV_BLC_PWM_CTL2(pipe); | |
608 | else | |
609 | reg = BLC_PWM_CTL2; | |
24ded204 DV |
610 | |
611 | I915_WRITE(reg, I915_READ(reg) & ~BLM_PWM_ENABLE); | |
a4f32fc3 PZ |
612 | |
613 | if (HAS_PCH_SPLIT(dev)) { | |
614 | tmp = I915_READ(BLC_PWM_PCH_CTL1); | |
615 | tmp &= ~BLM_PCH_PWM_ENABLE; | |
616 | I915_WRITE(BLC_PWM_PCH_CTL1, tmp); | |
617 | } | |
24ded204 | 618 | } |
8ba2d185 JN |
619 | |
620 | spin_unlock_irqrestore(&dev_priv->backlight.lock, flags); | |
47356eb6 CW |
621 | } |
622 | ||
752aa88a | 623 | void intel_panel_enable_backlight(struct intel_connector *connector) |
47356eb6 | 624 | { |
752aa88a | 625 | struct drm_device *dev = connector->base.dev; |
47356eb6 | 626 | struct drm_i915_private *dev_priv = dev->dev_private; |
752aa88a | 627 | enum pipe pipe = intel_get_pipe_from_connector(connector); |
35ffda48 JN |
628 | enum transcoder cpu_transcoder = |
629 | intel_pipe_to_cpu_transcoder(dev_priv, pipe); | |
8ba2d185 JN |
630 | unsigned long flags; |
631 | ||
752aa88a JB |
632 | if (pipe == INVALID_PIPE) |
633 | return; | |
634 | ||
6f2bcceb | 635 | DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe)); |
540b5d02 | 636 | |
8ba2d185 | 637 | spin_lock_irqsave(&dev_priv->backlight.lock, flags); |
47356eb6 | 638 | |
31ad8ec6 | 639 | if (dev_priv->backlight.level == 0) { |
752aa88a JB |
640 | dev_priv->backlight.level = intel_panel_get_max_backlight(dev, |
641 | pipe); | |
31ad8ec6 JN |
642 | if (dev_priv->backlight.device) |
643 | dev_priv->backlight.device->props.brightness = | |
644 | dev_priv->backlight.level; | |
b6b3ba5b | 645 | } |
47356eb6 | 646 | |
24ded204 DV |
647 | if (INTEL_INFO(dev)->gen >= 4) { |
648 | uint32_t reg, tmp; | |
649 | ||
07bf139b JB |
650 | if (HAS_PCH_SPLIT(dev)) |
651 | reg = BLC_PWM_CPU_CTL2; | |
652 | else if (IS_VALLEYVIEW(dev)) | |
653 | reg = VLV_BLC_PWM_CTL2(pipe); | |
654 | else | |
655 | reg = BLC_PWM_CTL2; | |
24ded204 DV |
656 | |
657 | tmp = I915_READ(reg); | |
658 | ||
659 | /* Note that this can also get called through dpms changes. And | |
660 | * we don't track the backlight dpms state, hence check whether | |
661 | * we have to do anything first. */ | |
662 | if (tmp & BLM_PWM_ENABLE) | |
770c1231 | 663 | goto set_level; |
24ded204 | 664 | |
7eb552ae | 665 | if (INTEL_INFO(dev)->num_pipes == 3) |
24ded204 DV |
666 | tmp &= ~BLM_PIPE_SELECT_IVB; |
667 | else | |
668 | tmp &= ~BLM_PIPE_SELECT; | |
669 | ||
35ffda48 JN |
670 | if (cpu_transcoder == TRANSCODER_EDP) |
671 | tmp |= BLM_TRANSCODER_EDP; | |
672 | else | |
673 | tmp |= BLM_PIPE(cpu_transcoder); | |
24ded204 DV |
674 | tmp &= ~BLM_PWM_ENABLE; |
675 | ||
676 | I915_WRITE(reg, tmp); | |
677 | POSTING_READ(reg); | |
678 | I915_WRITE(reg, tmp | BLM_PWM_ENABLE); | |
a4f32fc3 | 679 | |
f8e10062 BW |
680 | if (IS_BROADWELL(dev)) { |
681 | /* | |
682 | * Broadwell requires PCH override to drive the PCH | |
683 | * backlight pin. The above will configure the CPU | |
684 | * backlight pin, which we don't plan to use. | |
685 | */ | |
686 | tmp = I915_READ(BLC_PWM_PCH_CTL1); | |
687 | tmp |= BLM_PCH_OVERRIDE_ENABLE | BLM_PCH_PWM_ENABLE; | |
688 | I915_WRITE(BLC_PWM_PCH_CTL1, tmp); | |
689 | } else if (HAS_PCH_SPLIT(dev) && | |
e85843be | 690 | !(dev_priv->quirks & QUIRK_NO_PCH_PWM_ENABLE)) { |
a4f32fc3 PZ |
691 | tmp = I915_READ(BLC_PWM_PCH_CTL1); |
692 | tmp |= BLM_PCH_PWM_ENABLE; | |
693 | tmp &= ~BLM_PCH_OVERRIDE_ENABLE; | |
694 | I915_WRITE(BLC_PWM_PCH_CTL1, tmp); | |
695 | } | |
24ded204 | 696 | } |
770c1231 TI |
697 | |
698 | set_level: | |
b1289371 DV |
699 | /* Call below after setting BLC_PWM_CPU_CTL2 and BLC_PWM_PCH_CTL1. |
700 | * BLC_PWM_CPU_CTL may be cleared to zero automatically when these | |
701 | * registers are set. | |
770c1231 | 702 | */ |
ecb135a1 | 703 | dev_priv->backlight.enabled = true; |
752aa88a JB |
704 | intel_panel_actually_set_backlight(dev, pipe, |
705 | dev_priv->backlight.level); | |
8ba2d185 JN |
706 | |
707 | spin_unlock_irqrestore(&dev_priv->backlight.lock, flags); | |
47356eb6 CW |
708 | } |
709 | ||
afc85b9d JB |
710 | /* FIXME: use VBT vals to init PWM_CTL and PWM_CTL2 correctly */ |
711 | static void intel_panel_init_backlight_regs(struct drm_device *dev) | |
712 | { | |
713 | struct drm_i915_private *dev_priv = dev->dev_private; | |
714 | ||
715 | if (IS_VALLEYVIEW(dev)) { | |
07bf139b JB |
716 | enum pipe pipe; |
717 | ||
718 | for_each_pipe(pipe) { | |
719 | u32 cur_val = I915_READ(VLV_BLC_PWM_CTL(pipe)); | |
720 | ||
721 | /* Skip if the modulation freq is already set */ | |
722 | if (cur_val & ~BACKLIGHT_DUTY_CYCLE_MASK) | |
723 | continue; | |
724 | ||
725 | cur_val &= BACKLIGHT_DUTY_CYCLE_MASK; | |
726 | I915_WRITE(VLV_BLC_PWM_CTL(pipe), (0xf42 << 16) | | |
727 | cur_val); | |
728 | } | |
afc85b9d JB |
729 | } |
730 | } | |
731 | ||
aaa6fd2a | 732 | static void intel_panel_init_backlight(struct drm_device *dev) |
47356eb6 CW |
733 | { |
734 | struct drm_i915_private *dev_priv = dev->dev_private; | |
735 | ||
afc85b9d JB |
736 | intel_panel_init_backlight_regs(dev); |
737 | ||
752aa88a | 738 | dev_priv->backlight.level = intel_panel_get_backlight(dev, 0); |
31ad8ec6 | 739 | dev_priv->backlight.enabled = dev_priv->backlight.level != 0; |
47356eb6 | 740 | } |
fe16d949 CW |
741 | |
742 | enum drm_connector_status | |
743 | intel_panel_detect(struct drm_device *dev) | |
744 | { | |
745 | struct drm_i915_private *dev_priv = dev->dev_private; | |
746 | ||
747 | /* Assume that the BIOS does not lie through the OpRegion... */ | |
a726915c | 748 | if (!i915_panel_ignore_lid && dev_priv->opregion.lid_state) { |
fe16d949 CW |
749 | return ioread32(dev_priv->opregion.lid_state) & 0x1 ? |
750 | connector_status_connected : | |
751 | connector_status_disconnected; | |
a726915c | 752 | } |
fe16d949 | 753 | |
a726915c DV |
754 | switch (i915_panel_ignore_lid) { |
755 | case -2: | |
756 | return connector_status_connected; | |
757 | case -1: | |
758 | return connector_status_disconnected; | |
759 | default: | |
760 | return connector_status_unknown; | |
761 | } | |
fe16d949 | 762 | } |
aaa6fd2a | 763 | |
912e8b12 | 764 | #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) |
aaa6fd2a MG |
765 | static int intel_panel_update_status(struct backlight_device *bd) |
766 | { | |
752aa88a JB |
767 | struct intel_connector *connector = bl_get_data(bd); |
768 | struct drm_device *dev = connector->base.dev; | |
769 | ||
770 | mutex_lock(&dev->mode_config.mutex); | |
540b5d02 CW |
771 | DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n", |
772 | bd->props.brightness, bd->props.max_brightness); | |
752aa88a | 773 | intel_panel_set_backlight(connector, bd->props.brightness, |
d6540632 | 774 | bd->props.max_brightness); |
752aa88a | 775 | mutex_unlock(&dev->mode_config.mutex); |
aaa6fd2a MG |
776 | return 0; |
777 | } | |
778 | ||
779 | static int intel_panel_get_brightness(struct backlight_device *bd) | |
780 | { | |
752aa88a JB |
781 | struct intel_connector *connector = bl_get_data(bd); |
782 | struct drm_device *dev = connector->base.dev; | |
783 | enum pipe pipe; | |
784 | ||
785 | mutex_lock(&dev->mode_config.mutex); | |
786 | pipe = intel_get_pipe_from_connector(connector); | |
787 | mutex_unlock(&dev->mode_config.mutex); | |
788 | if (pipe == INVALID_PIPE) | |
789 | return 0; | |
790 | ||
791 | return intel_panel_get_backlight(connector->base.dev, pipe); | |
aaa6fd2a MG |
792 | } |
793 | ||
794 | static const struct backlight_ops intel_panel_bl_ops = { | |
795 | .update_status = intel_panel_update_status, | |
796 | .get_brightness = intel_panel_get_brightness, | |
797 | }; | |
798 | ||
0657b6b1 | 799 | int intel_panel_setup_backlight(struct drm_connector *connector) |
aaa6fd2a | 800 | { |
0657b6b1 | 801 | struct drm_device *dev = connector->dev; |
aaa6fd2a MG |
802 | struct drm_i915_private *dev_priv = dev->dev_private; |
803 | struct backlight_properties props; | |
8ba2d185 | 804 | unsigned long flags; |
aaa6fd2a MG |
805 | |
806 | intel_panel_init_backlight(dev); | |
807 | ||
dc652f90 JN |
808 | if (WARN_ON(dev_priv->backlight.device)) |
809 | return -ENODEV; | |
810 | ||
af437cfd | 811 | memset(&props, 0, sizeof(props)); |
aaa6fd2a | 812 | props.type = BACKLIGHT_RAW; |
31ad8ec6 | 813 | props.brightness = dev_priv->backlight.level; |
8ba2d185 JN |
814 | |
815 | spin_lock_irqsave(&dev_priv->backlight.lock, flags); | |
752aa88a | 816 | props.max_brightness = intel_panel_get_max_backlight(dev, 0); |
8ba2d185 JN |
817 | spin_unlock_irqrestore(&dev_priv->backlight.lock, flags); |
818 | ||
28dcc2d6 | 819 | if (props.max_brightness == 0) { |
e86b6185 | 820 | DRM_DEBUG_DRIVER("Failed to get maximum backlight value\n"); |
28dcc2d6 JN |
821 | return -ENODEV; |
822 | } | |
31ad8ec6 | 823 | dev_priv->backlight.device = |
aaa6fd2a | 824 | backlight_device_register("intel_backlight", |
91915260 | 825 | connector->kdev, |
752aa88a | 826 | to_intel_connector(connector), |
aaa6fd2a MG |
827 | &intel_panel_bl_ops, &props); |
828 | ||
31ad8ec6 | 829 | if (IS_ERR(dev_priv->backlight.device)) { |
aaa6fd2a | 830 | DRM_ERROR("Failed to register backlight: %ld\n", |
31ad8ec6 JN |
831 | PTR_ERR(dev_priv->backlight.device)); |
832 | dev_priv->backlight.device = NULL; | |
aaa6fd2a MG |
833 | return -ENODEV; |
834 | } | |
aaa6fd2a MG |
835 | return 0; |
836 | } | |
837 | ||
838 | void intel_panel_destroy_backlight(struct drm_device *dev) | |
839 | { | |
840 | struct drm_i915_private *dev_priv = dev->dev_private; | |
dc652f90 | 841 | if (dev_priv->backlight.device) { |
31ad8ec6 | 842 | backlight_device_unregister(dev_priv->backlight.device); |
dc652f90 JN |
843 | dev_priv->backlight.device = NULL; |
844 | } | |
aaa6fd2a MG |
845 | } |
846 | #else | |
0657b6b1 | 847 | int intel_panel_setup_backlight(struct drm_connector *connector) |
aaa6fd2a | 848 | { |
0657b6b1 | 849 | intel_panel_init_backlight(connector->dev); |
aaa6fd2a MG |
850 | return 0; |
851 | } | |
852 | ||
853 | void intel_panel_destroy_backlight(struct drm_device *dev) | |
854 | { | |
855 | return; | |
856 | } | |
857 | #endif | |
1d508706 | 858 | |
dd06f90e JN |
859 | int intel_panel_init(struct intel_panel *panel, |
860 | struct drm_display_mode *fixed_mode) | |
1d508706 | 861 | { |
dd06f90e JN |
862 | panel->fixed_mode = fixed_mode; |
863 | ||
1d508706 JN |
864 | return 0; |
865 | } | |
866 | ||
867 | void intel_panel_fini(struct intel_panel *panel) | |
868 | { | |
dd06f90e JN |
869 | struct intel_connector *intel_connector = |
870 | container_of(panel, struct intel_connector, panel); | |
871 | ||
872 | if (panel->fixed_mode) | |
873 | drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode); | |
1d508706 | 874 | } |