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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 "intel_drv.h"
32
33#define PCI_LBPC 0xf4 /* legacy/combination backlight modes */
34
35void
36intel_fixed_panel_mode(struct drm_display_mode *fixed_mode,
37 struct drm_display_mode *adjusted_mode)
38{
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;
43
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;
48
49 adjusted_mode->clock = fixed_mode->clock;
50
51 drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
52}
53
54/* adjusted_mode has been preset to be the panel's fixed mode */
55void
56intel_pch_panel_fitting(struct drm_device *dev,
57 int fitting_mode,
58 struct drm_display_mode *mode,
59 struct drm_display_mode *adjusted_mode)
60{
61 struct drm_i915_private *dev_priv = dev->dev_private;
62 int x, y, width, height;
63
64 x = y = width = height = 0;
65
66 /* Native modes don't need fitting */
67 if (adjusted_mode->hdisplay == mode->hdisplay &&
68 adjusted_mode->vdisplay == mode->vdisplay)
69 goto done;
70
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;
77 break;
78
79 case DRM_MODE_SCALE_ASPECT:
80 /* Scale but preserve the aspect ratio */
81 {
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 if (width & 1)
87 width++;
88 x = (adjusted_mode->hdisplay - width + 1) / 2;
89 y = 0;
90 height = adjusted_mode->vdisplay;
91 } else if (scaled_width < scaled_height) { /* letter */
92 height = scaled_width / mode->hdisplay;
93 if (height & 1)
94 height++;
95 y = (adjusted_mode->vdisplay - height + 1) / 2;
96 x = 0;
97 width = adjusted_mode->hdisplay;
98 } else {
99 x = y = 0;
100 width = adjusted_mode->hdisplay;
101 height = adjusted_mode->vdisplay;
102 }
103 }
104 break;
105
106 default:
107 case DRM_MODE_SCALE_FULLSCREEN:
108 x = y = 0;
109 width = adjusted_mode->hdisplay;
110 height = adjusted_mode->vdisplay;
111 break;
112 }
113
114done:
115 dev_priv->pch_pf_pos = (x << 16) | y;
116 dev_priv->pch_pf_size = (width << 16) | height;
117}
118
119static int is_backlight_combination_mode(struct drm_device *dev)
120{
121 struct drm_i915_private *dev_priv = dev->dev_private;
122
123 if (INTEL_INFO(dev)->gen >= 4)
124 return I915_READ(BLC_PWM_CTL2) & BLM_COMBINATION_MODE;
125
126 if (IS_GEN2(dev))
127 return I915_READ(BLC_PWM_CTL) & BLM_LEGACY_MODE;
128
129 return 0;
130}
131
132static u32 i915_read_blc_pwm_ctl(struct drm_i915_private *dev_priv)
133{
134 u32 val;
135
136 /* Restore the CTL value if it lost, e.g. GPU reset */
137
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;
146 }
147 } else {
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;
158 }
159 }
160
161 return val;
162}
163
164u32 intel_panel_get_max_backlight(struct drm_device *dev)
165{
166 struct drm_i915_private *dev_priv = dev->dev_private;
167 u32 max;
168
169 max = i915_read_blc_pwm_ctl(dev_priv);
170 if (max == 0) {
171 /* XXX add code here to query mode clock or hardware clock
172 * and program max PWM appropriately.
173 */
174 printk_once(KERN_WARNING "fixme: max PWM is zero.\n");
175 return 1;
176 }
177
178 if (HAS_PCH_SPLIT(dev)) {
179 max >>= 16;
180 } else {
181 if (IS_PINEVIEW(dev)) {
182 max >>= 17;
183 } else {
184 max >>= 16;
185 if (INTEL_INFO(dev)->gen < 4)
186 max &= ~1;
187 }
188
189 if (is_backlight_combination_mode(dev))
190 max *= 0xff;
191 }
192
193 DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max);
194 return max;
195}
196
197u32 intel_panel_get_backlight(struct drm_device *dev)
198{
199 struct drm_i915_private *dev_priv = dev->dev_private;
200 u32 val;
201
202 if (HAS_PCH_SPLIT(dev)) {
203 val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
204 } else {
205 val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
206 if (IS_PINEVIEW(dev))
207 val >>= 1;
208
209 if (is_backlight_combination_mode(dev)){
210 u8 lbpc;
211
212 val &= ~1;
213 pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc);
214 val *= lbpc;
215 }
216 }
217
218 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
219 return val;
220}
221
222static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level)
223{
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);
227}
228
229void intel_panel_set_backlight(struct drm_device *dev, u32 level)
230{
231 struct drm_i915_private *dev_priv = dev->dev_private;
232 u32 tmp;
233
234 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
235
236 if (HAS_PCH_SPLIT(dev))
237 return intel_pch_panel_set_backlight(dev, level);
238
239 if (is_backlight_combination_mode(dev)){
240 u32 max = intel_panel_get_max_backlight(dev);
241 u8 lbpc;
242
243 lbpc = level * 0xfe / max + 1;
244 level /= lbpc;
245 pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
246 }
247
248 tmp = I915_READ(BLC_PWM_CTL);
249 if (IS_PINEVIEW(dev)) {
250 tmp &= ~(BACKLIGHT_DUTY_CYCLE_MASK - 1);
251 level <<= 1;
252 } else
253 tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK;
254 I915_WRITE(BLC_PWM_CTL, tmp | level);
255}
256
257void intel_panel_disable_backlight(struct drm_device *dev)
258{
259 struct drm_i915_private *dev_priv = dev->dev_private;
260
261 if (dev_priv->backlight_enabled) {
262 dev_priv->backlight_level = intel_panel_get_backlight(dev);
263 dev_priv->backlight_enabled = false;
264 }
265
266 intel_panel_set_backlight(dev, 0);
267}
268
269void intel_panel_enable_backlight(struct drm_device *dev)
270{
271 struct drm_i915_private *dev_priv = dev->dev_private;
272
273 if (dev_priv->backlight_level == 0)
274 dev_priv->backlight_level = intel_panel_get_max_backlight(dev);
275
276 intel_panel_set_backlight(dev, dev_priv->backlight_level);
277 dev_priv->backlight_enabled = true;
278}
279
280static void intel_panel_init_backlight(struct drm_device *dev)
281{
282 struct drm_i915_private *dev_priv = dev->dev_private;
283
284 dev_priv->backlight_level = intel_panel_get_backlight(dev);
285 dev_priv->backlight_enabled = dev_priv->backlight_level != 0;
286}
287
288enum drm_connector_status
289intel_panel_detect(struct drm_device *dev)
290{
291#if 0
292 struct drm_i915_private *dev_priv = dev->dev_private;
293#endif
294
295 if (i915_panel_ignore_lid)
296 return i915_panel_ignore_lid > 0 ?
297 connector_status_connected :
298 connector_status_disconnected;
299
300 /* opregion lid state on HP 2540p is wrong at boot up,
301 * appears to be either the BIOS or Linux ACPI fault */
302#if 0
303 /* Assume that the BIOS does not lie through the OpRegion... */
304 if (dev_priv->opregion.lid_state)
305 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
306 connector_status_connected :
307 connector_status_disconnected;
308#endif
309
310 return connector_status_unknown;
311}
312
313#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
314static int intel_panel_update_status(struct backlight_device *bd)
315{
316 struct drm_device *dev = bl_get_data(bd);
317 intel_panel_set_backlight(dev, bd->props.brightness);
318 return 0;
319}
320
321static int intel_panel_get_brightness(struct backlight_device *bd)
322{
323 struct drm_device *dev = bl_get_data(bd);
324 return intel_panel_get_backlight(dev);
325}
326
327static const struct backlight_ops intel_panel_bl_ops = {
328 .update_status = intel_panel_update_status,
329 .get_brightness = intel_panel_get_brightness,
330};
331
332int intel_panel_setup_backlight(struct drm_device *dev)
333{
334 struct drm_i915_private *dev_priv = dev->dev_private;
335 struct backlight_properties props;
336 struct drm_connector *connector;
337
338 intel_panel_init_backlight(dev);
339
340 if (dev_priv->int_lvds_connector)
341 connector = dev_priv->int_lvds_connector;
342 else if (dev_priv->int_edp_connector)
343 connector = dev_priv->int_edp_connector;
344 else
345 return -ENODEV;
346
347 props.type = BACKLIGHT_RAW;
348 props.max_brightness = intel_panel_get_max_backlight(dev);
349 dev_priv->backlight =
350 backlight_device_register("intel_backlight",
351 &connector->kdev, dev,
352 &intel_panel_bl_ops, &props);
353
354 if (IS_ERR(dev_priv->backlight)) {
355 DRM_ERROR("Failed to register backlight: %ld\n",
356 PTR_ERR(dev_priv->backlight));
357 dev_priv->backlight = NULL;
358 return -ENODEV;
359 }
360 dev_priv->backlight->props.brightness = intel_panel_get_backlight(dev);
361 return 0;
362}
363
364void intel_panel_destroy_backlight(struct drm_device *dev)
365{
366 struct drm_i915_private *dev_priv = dev->dev_private;
367 if (dev_priv->backlight)
368 backlight_device_unregister(dev_priv->backlight);
369}
370#else
371int intel_panel_setup_backlight(struct drm_device *dev)
372{
373 intel_panel_init_backlight(dev);
374 return 0;
375}
376
377void intel_panel_destroy_backlight(struct drm_device *dev)
378{
379 return;
380}
381#endif
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
32
33#include <linux/moduleparam.h>
34#include "intel_drv.h"
35
36void
37intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
38 struct drm_display_mode *adjusted_mode)
39{
40 drm_mode_copy(adjusted_mode, fixed_mode);
41
42 drm_mode_set_crtcinfo(adjusted_mode, 0);
43}
44
45/* adjusted_mode has been preset to be the panel's fixed mode */
46void
47intel_pch_panel_fitting(struct intel_crtc *intel_crtc,
48 struct intel_crtc_config *pipe_config,
49 int fitting_mode)
50{
51 struct drm_display_mode *adjusted_mode;
52 int x, y, width, height;
53
54 adjusted_mode = &pipe_config->adjusted_mode;
55
56 x = y = width = height = 0;
57
58 /* Native modes don't need fitting */
59 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
60 adjusted_mode->vdisplay == pipe_config->pipe_src_h)
61 goto done;
62
63 switch (fitting_mode) {
64 case DRM_MODE_SCALE_CENTER:
65 width = pipe_config->pipe_src_w;
66 height = pipe_config->pipe_src_h;
67 x = (adjusted_mode->hdisplay - width + 1)/2;
68 y = (adjusted_mode->vdisplay - height + 1)/2;
69 break;
70
71 case DRM_MODE_SCALE_ASPECT:
72 /* Scale but preserve the aspect ratio */
73 {
74 u32 scaled_width = adjusted_mode->hdisplay
75 * pipe_config->pipe_src_h;
76 u32 scaled_height = pipe_config->pipe_src_w
77 * adjusted_mode->vdisplay;
78 if (scaled_width > scaled_height) { /* pillar */
79 width = scaled_height / pipe_config->pipe_src_h;
80 if (width & 1)
81 width++;
82 x = (adjusted_mode->hdisplay - width + 1) / 2;
83 y = 0;
84 height = adjusted_mode->vdisplay;
85 } else if (scaled_width < scaled_height) { /* letter */
86 height = scaled_width / pipe_config->pipe_src_w;
87 if (height & 1)
88 height++;
89 y = (adjusted_mode->vdisplay - height + 1) / 2;
90 x = 0;
91 width = adjusted_mode->hdisplay;
92 } else {
93 x = y = 0;
94 width = adjusted_mode->hdisplay;
95 height = adjusted_mode->vdisplay;
96 }
97 }
98 break;
99
100 case DRM_MODE_SCALE_FULLSCREEN:
101 x = y = 0;
102 width = adjusted_mode->hdisplay;
103 height = adjusted_mode->vdisplay;
104 break;
105
106 default:
107 WARN(1, "bad panel fit mode: %d\n", fitting_mode);
108 return;
109 }
110
111done:
112 pipe_config->pch_pfit.pos = (x << 16) | y;
113 pipe_config->pch_pfit.size = (width << 16) | height;
114 pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0;
115}
116
117static void
118centre_horizontally(struct drm_display_mode *mode,
119 int width)
120{
121 u32 border, sync_pos, blank_width, sync_width;
122
123 /* keep the hsync and hblank widths constant */
124 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
125 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
126 sync_pos = (blank_width - sync_width + 1) / 2;
127
128 border = (mode->hdisplay - width + 1) / 2;
129 border += border & 1; /* make the border even */
130
131 mode->crtc_hdisplay = width;
132 mode->crtc_hblank_start = width + border;
133 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
134
135 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
136 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
137}
138
139static void
140centre_vertically(struct drm_display_mode *mode,
141 int height)
142{
143 u32 border, sync_pos, blank_width, sync_width;
144
145 /* keep the vsync and vblank widths constant */
146 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
147 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
148 sync_pos = (blank_width - sync_width + 1) / 2;
149
150 border = (mode->vdisplay - height + 1) / 2;
151
152 mode->crtc_vdisplay = height;
153 mode->crtc_vblank_start = height + border;
154 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
155
156 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
157 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
158}
159
160static inline u32 panel_fitter_scaling(u32 source, u32 target)
161{
162 /*
163 * Floating point operation is not supported. So the FACTOR
164 * is defined, which can avoid the floating point computation
165 * when calculating the panel ratio.
166 */
167#define ACCURACY 12
168#define FACTOR (1 << ACCURACY)
169 u32 ratio = source * FACTOR / target;
170 return (FACTOR * ratio + FACTOR/2) / FACTOR;
171}
172
173static void i965_scale_aspect(struct intel_crtc_config *pipe_config,
174 u32 *pfit_control)
175{
176 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
177 u32 scaled_width = adjusted_mode->hdisplay *
178 pipe_config->pipe_src_h;
179 u32 scaled_height = pipe_config->pipe_src_w *
180 adjusted_mode->vdisplay;
181
182 /* 965+ is easy, it does everything in hw */
183 if (scaled_width > scaled_height)
184 *pfit_control |= PFIT_ENABLE |
185 PFIT_SCALING_PILLAR;
186 else if (scaled_width < scaled_height)
187 *pfit_control |= PFIT_ENABLE |
188 PFIT_SCALING_LETTER;
189 else if (adjusted_mode->hdisplay != pipe_config->pipe_src_w)
190 *pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
191}
192
193static void i9xx_scale_aspect(struct intel_crtc_config *pipe_config,
194 u32 *pfit_control, u32 *pfit_pgm_ratios,
195 u32 *border)
196{
197 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
198 u32 scaled_width = adjusted_mode->hdisplay *
199 pipe_config->pipe_src_h;
200 u32 scaled_height = pipe_config->pipe_src_w *
201 adjusted_mode->vdisplay;
202 u32 bits;
203
204 /*
205 * For earlier chips we have to calculate the scaling
206 * ratio by hand and program it into the
207 * PFIT_PGM_RATIO register
208 */
209 if (scaled_width > scaled_height) { /* pillar */
210 centre_horizontally(adjusted_mode,
211 scaled_height /
212 pipe_config->pipe_src_h);
213
214 *border = LVDS_BORDER_ENABLE;
215 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay) {
216 bits = panel_fitter_scaling(pipe_config->pipe_src_h,
217 adjusted_mode->vdisplay);
218
219 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
220 bits << PFIT_VERT_SCALE_SHIFT);
221 *pfit_control |= (PFIT_ENABLE |
222 VERT_INTERP_BILINEAR |
223 HORIZ_INTERP_BILINEAR);
224 }
225 } else if (scaled_width < scaled_height) { /* letter */
226 centre_vertically(adjusted_mode,
227 scaled_width /
228 pipe_config->pipe_src_w);
229
230 *border = LVDS_BORDER_ENABLE;
231 if (pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
232 bits = panel_fitter_scaling(pipe_config->pipe_src_w,
233 adjusted_mode->hdisplay);
234
235 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
236 bits << PFIT_VERT_SCALE_SHIFT);
237 *pfit_control |= (PFIT_ENABLE |
238 VERT_INTERP_BILINEAR |
239 HORIZ_INTERP_BILINEAR);
240 }
241 } else {
242 /* Aspects match, Let hw scale both directions */
243 *pfit_control |= (PFIT_ENABLE |
244 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
245 VERT_INTERP_BILINEAR |
246 HORIZ_INTERP_BILINEAR);
247 }
248}
249
250void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc,
251 struct intel_crtc_config *pipe_config,
252 int fitting_mode)
253{
254 struct drm_device *dev = intel_crtc->base.dev;
255 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
256 struct drm_display_mode *adjusted_mode;
257
258 adjusted_mode = &pipe_config->adjusted_mode;
259
260 /* Native modes don't need fitting */
261 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
262 adjusted_mode->vdisplay == pipe_config->pipe_src_h)
263 goto out;
264
265 switch (fitting_mode) {
266 case DRM_MODE_SCALE_CENTER:
267 /*
268 * For centered modes, we have to calculate border widths &
269 * heights and modify the values programmed into the CRTC.
270 */
271 centre_horizontally(adjusted_mode, pipe_config->pipe_src_w);
272 centre_vertically(adjusted_mode, pipe_config->pipe_src_h);
273 border = LVDS_BORDER_ENABLE;
274 break;
275 case DRM_MODE_SCALE_ASPECT:
276 /* Scale but preserve the aspect ratio */
277 if (INTEL_INFO(dev)->gen >= 4)
278 i965_scale_aspect(pipe_config, &pfit_control);
279 else
280 i9xx_scale_aspect(pipe_config, &pfit_control,
281 &pfit_pgm_ratios, &border);
282 break;
283 case DRM_MODE_SCALE_FULLSCREEN:
284 /*
285 * Full scaling, even if it changes the aspect ratio.
286 * Fortunately this is all done for us in hw.
287 */
288 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay ||
289 pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
290 pfit_control |= PFIT_ENABLE;
291 if (INTEL_INFO(dev)->gen >= 4)
292 pfit_control |= PFIT_SCALING_AUTO;
293 else
294 pfit_control |= (VERT_AUTO_SCALE |
295 VERT_INTERP_BILINEAR |
296 HORIZ_AUTO_SCALE |
297 HORIZ_INTERP_BILINEAR);
298 }
299 break;
300 default:
301 WARN(1, "bad panel fit mode: %d\n", fitting_mode);
302 return;
303 }
304
305 /* 965+ wants fuzzy fitting */
306 /* FIXME: handle multiple panels by failing gracefully */
307 if (INTEL_INFO(dev)->gen >= 4)
308 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
309 PFIT_FILTER_FUZZY);
310
311out:
312 if ((pfit_control & PFIT_ENABLE) == 0) {
313 pfit_control = 0;
314 pfit_pgm_ratios = 0;
315 }
316
317 /* Make sure pre-965 set dither correctly for 18bpp panels. */
318 if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18)
319 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
320
321 pipe_config->gmch_pfit.control = pfit_control;
322 pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios;
323 pipe_config->gmch_pfit.lvds_border_bits = border;
324}
325
326static u32 intel_panel_compute_brightness(struct intel_connector *connector,
327 u32 val)
328{
329 struct drm_device *dev = connector->base.dev;
330 struct drm_i915_private *dev_priv = dev->dev_private;
331 struct intel_panel *panel = &connector->panel;
332
333 WARN_ON(panel->backlight.max == 0);
334
335 if (i915.invert_brightness < 0)
336 return val;
337
338 if (i915.invert_brightness > 0 ||
339 dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) {
340 return panel->backlight.max - val;
341 }
342
343 return val;
344}
345
346static u32 bdw_get_backlight(struct intel_connector *connector)
347{
348 struct drm_device *dev = connector->base.dev;
349 struct drm_i915_private *dev_priv = dev->dev_private;
350
351 return I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK;
352}
353
354static u32 pch_get_backlight(struct intel_connector *connector)
355{
356 struct drm_device *dev = connector->base.dev;
357 struct drm_i915_private *dev_priv = dev->dev_private;
358
359 return I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
360}
361
362static u32 i9xx_get_backlight(struct intel_connector *connector)
363{
364 struct drm_device *dev = connector->base.dev;
365 struct drm_i915_private *dev_priv = dev->dev_private;
366 struct intel_panel *panel = &connector->panel;
367 u32 val;
368
369 val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
370 if (INTEL_INFO(dev)->gen < 4)
371 val >>= 1;
372
373 if (panel->backlight.combination_mode) {
374 u8 lbpc;
375
376 pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc);
377 val *= lbpc;
378 }
379
380 return val;
381}
382
383static u32 _vlv_get_backlight(struct drm_device *dev, enum pipe pipe)
384{
385 struct drm_i915_private *dev_priv = dev->dev_private;
386
387 return I915_READ(VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK;
388}
389
390static u32 vlv_get_backlight(struct intel_connector *connector)
391{
392 struct drm_device *dev = connector->base.dev;
393 enum pipe pipe = intel_get_pipe_from_connector(connector);
394
395 return _vlv_get_backlight(dev, pipe);
396}
397
398static u32 intel_panel_get_backlight(struct intel_connector *connector)
399{
400 struct drm_device *dev = connector->base.dev;
401 struct drm_i915_private *dev_priv = dev->dev_private;
402 u32 val;
403 unsigned long flags;
404
405 spin_lock_irqsave(&dev_priv->backlight_lock, flags);
406
407 val = dev_priv->display.get_backlight(connector);
408 val = intel_panel_compute_brightness(connector, val);
409
410 spin_unlock_irqrestore(&dev_priv->backlight_lock, flags);
411
412 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
413 return val;
414}
415
416static void bdw_set_backlight(struct intel_connector *connector, u32 level)
417{
418 struct drm_device *dev = connector->base.dev;
419 struct drm_i915_private *dev_priv = dev->dev_private;
420 u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK;
421 I915_WRITE(BLC_PWM_PCH_CTL2, val | level);
422}
423
424static void pch_set_backlight(struct intel_connector *connector, u32 level)
425{
426 struct drm_device *dev = connector->base.dev;
427 struct drm_i915_private *dev_priv = dev->dev_private;
428 u32 tmp;
429
430 tmp = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
431 I915_WRITE(BLC_PWM_CPU_CTL, tmp | level);
432}
433
434static void i9xx_set_backlight(struct intel_connector *connector, u32 level)
435{
436 struct drm_device *dev = connector->base.dev;
437 struct drm_i915_private *dev_priv = dev->dev_private;
438 struct intel_panel *panel = &connector->panel;
439 u32 tmp, mask;
440
441 WARN_ON(panel->backlight.max == 0);
442
443 if (panel->backlight.combination_mode) {
444 u8 lbpc;
445
446 lbpc = level * 0xfe / panel->backlight.max + 1;
447 level /= lbpc;
448 pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
449 }
450
451 if (IS_GEN4(dev)) {
452 mask = BACKLIGHT_DUTY_CYCLE_MASK;
453 } else {
454 level <<= 1;
455 mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV;
456 }
457
458 tmp = I915_READ(BLC_PWM_CTL) & ~mask;
459 I915_WRITE(BLC_PWM_CTL, tmp | level);
460}
461
462static void vlv_set_backlight(struct intel_connector *connector, u32 level)
463{
464 struct drm_device *dev = connector->base.dev;
465 struct drm_i915_private *dev_priv = dev->dev_private;
466 enum pipe pipe = intel_get_pipe_from_connector(connector);
467 u32 tmp;
468
469 tmp = I915_READ(VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK;
470 I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level);
471}
472
473static void
474intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level)
475{
476 struct drm_device *dev = connector->base.dev;
477 struct drm_i915_private *dev_priv = dev->dev_private;
478
479 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
480
481 level = intel_panel_compute_brightness(connector, level);
482 dev_priv->display.set_backlight(connector, level);
483}
484
485/* set backlight brightness to level in range [0..max] */
486void intel_panel_set_backlight(struct intel_connector *connector, u32 level,
487 u32 max)
488{
489 struct drm_device *dev = connector->base.dev;
490 struct drm_i915_private *dev_priv = dev->dev_private;
491 struct intel_panel *panel = &connector->panel;
492 enum pipe pipe = intel_get_pipe_from_connector(connector);
493 u32 freq;
494 unsigned long flags;
495 u64 n;
496
497 if (!panel->backlight.present || pipe == INVALID_PIPE)
498 return;
499
500 spin_lock_irqsave(&dev_priv->backlight_lock, flags);
501
502 WARN_ON(panel->backlight.max == 0);
503
504 /* scale to hardware max, but be careful to not overflow */
505 freq = panel->backlight.max;
506 n = (u64)level * freq;
507 do_div(n, max);
508 level = n;
509
510 panel->backlight.level = level;
511 if (panel->backlight.device)
512 panel->backlight.device->props.brightness = level;
513
514 if (panel->backlight.enabled)
515 intel_panel_actually_set_backlight(connector, level);
516
517 spin_unlock_irqrestore(&dev_priv->backlight_lock, flags);
518}
519
520static void pch_disable_backlight(struct intel_connector *connector)
521{
522 struct drm_device *dev = connector->base.dev;
523 struct drm_i915_private *dev_priv = dev->dev_private;
524 u32 tmp;
525
526 intel_panel_actually_set_backlight(connector, 0);
527
528 tmp = I915_READ(BLC_PWM_CPU_CTL2);
529 I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE);
530
531 tmp = I915_READ(BLC_PWM_PCH_CTL1);
532 I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE);
533}
534
535static void i9xx_disable_backlight(struct intel_connector *connector)
536{
537 intel_panel_actually_set_backlight(connector, 0);
538}
539
540static void i965_disable_backlight(struct intel_connector *connector)
541{
542 struct drm_device *dev = connector->base.dev;
543 struct drm_i915_private *dev_priv = dev->dev_private;
544 u32 tmp;
545
546 intel_panel_actually_set_backlight(connector, 0);
547
548 tmp = I915_READ(BLC_PWM_CTL2);
549 I915_WRITE(BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE);
550}
551
552static void vlv_disable_backlight(struct intel_connector *connector)
553{
554 struct drm_device *dev = connector->base.dev;
555 struct drm_i915_private *dev_priv = dev->dev_private;
556 enum pipe pipe = intel_get_pipe_from_connector(connector);
557 u32 tmp;
558
559 intel_panel_actually_set_backlight(connector, 0);
560
561 tmp = I915_READ(VLV_BLC_PWM_CTL2(pipe));
562 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE);
563}
564
565void intel_panel_disable_backlight(struct intel_connector *connector)
566{
567 struct drm_device *dev = connector->base.dev;
568 struct drm_i915_private *dev_priv = dev->dev_private;
569 struct intel_panel *panel = &connector->panel;
570 enum pipe pipe = intel_get_pipe_from_connector(connector);
571 unsigned long flags;
572
573 if (!panel->backlight.present || pipe == INVALID_PIPE)
574 return;
575
576 /*
577 * Do not disable backlight on the vgaswitcheroo path. When switching
578 * away from i915, the other client may depend on i915 to handle the
579 * backlight. This will leave the backlight on unnecessarily when
580 * another client is not activated.
581 */
582 if (dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) {
583 DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n");
584 return;
585 }
586
587 spin_lock_irqsave(&dev_priv->backlight_lock, flags);
588
589 panel->backlight.enabled = false;
590 dev_priv->display.disable_backlight(connector);
591
592 spin_unlock_irqrestore(&dev_priv->backlight_lock, flags);
593}
594
595static void bdw_enable_backlight(struct intel_connector *connector)
596{
597 struct drm_device *dev = connector->base.dev;
598 struct drm_i915_private *dev_priv = dev->dev_private;
599 struct intel_panel *panel = &connector->panel;
600 u32 pch_ctl1, pch_ctl2;
601
602 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
603 if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
604 DRM_DEBUG_KMS("pch backlight already enabled\n");
605 pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
606 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
607 }
608
609 pch_ctl2 = panel->backlight.max << 16;
610 I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
611
612 pch_ctl1 = 0;
613 if (panel->backlight.active_low_pwm)
614 pch_ctl1 |= BLM_PCH_POLARITY;
615
616 /* BDW always uses the pch pwm controls. */
617 pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE;
618
619 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
620 POSTING_READ(BLC_PWM_PCH_CTL1);
621 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
622
623 /* This won't stick until the above enable. */
624 intel_panel_actually_set_backlight(connector, panel->backlight.level);
625}
626
627static void pch_enable_backlight(struct intel_connector *connector)
628{
629 struct drm_device *dev = connector->base.dev;
630 struct drm_i915_private *dev_priv = dev->dev_private;
631 struct intel_panel *panel = &connector->panel;
632 enum pipe pipe = intel_get_pipe_from_connector(connector);
633 enum transcoder cpu_transcoder =
634 intel_pipe_to_cpu_transcoder(dev_priv, pipe);
635 u32 cpu_ctl2, pch_ctl1, pch_ctl2;
636
637 cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
638 if (cpu_ctl2 & BLM_PWM_ENABLE) {
639 WARN(1, "cpu backlight already enabled\n");
640 cpu_ctl2 &= ~BLM_PWM_ENABLE;
641 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
642 }
643
644 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
645 if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
646 DRM_DEBUG_KMS("pch backlight already enabled\n");
647 pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
648 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
649 }
650
651 if (cpu_transcoder == TRANSCODER_EDP)
652 cpu_ctl2 = BLM_TRANSCODER_EDP;
653 else
654 cpu_ctl2 = BLM_PIPE(cpu_transcoder);
655 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
656 POSTING_READ(BLC_PWM_CPU_CTL2);
657 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE);
658
659 /* This won't stick until the above enable. */
660 intel_panel_actually_set_backlight(connector, panel->backlight.level);
661
662 pch_ctl2 = panel->backlight.max << 16;
663 I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
664
665 pch_ctl1 = 0;
666 if (panel->backlight.active_low_pwm)
667 pch_ctl1 |= BLM_PCH_POLARITY;
668
669 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
670 POSTING_READ(BLC_PWM_PCH_CTL1);
671 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
672}
673
674static void i9xx_enable_backlight(struct intel_connector *connector)
675{
676 struct drm_device *dev = connector->base.dev;
677 struct drm_i915_private *dev_priv = dev->dev_private;
678 struct intel_panel *panel = &connector->panel;
679 u32 ctl, freq;
680
681 ctl = I915_READ(BLC_PWM_CTL);
682 if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) {
683 WARN(1, "backlight already enabled\n");
684 I915_WRITE(BLC_PWM_CTL, 0);
685 }
686
687 freq = panel->backlight.max;
688 if (panel->backlight.combination_mode)
689 freq /= 0xff;
690
691 ctl = freq << 17;
692 if (panel->backlight.combination_mode)
693 ctl |= BLM_LEGACY_MODE;
694 if (IS_PINEVIEW(dev) && panel->backlight.active_low_pwm)
695 ctl |= BLM_POLARITY_PNV;
696
697 I915_WRITE(BLC_PWM_CTL, ctl);
698 POSTING_READ(BLC_PWM_CTL);
699
700 /* XXX: combine this into above write? */
701 intel_panel_actually_set_backlight(connector, panel->backlight.level);
702}
703
704static void i965_enable_backlight(struct intel_connector *connector)
705{
706 struct drm_device *dev = connector->base.dev;
707 struct drm_i915_private *dev_priv = dev->dev_private;
708 struct intel_panel *panel = &connector->panel;
709 enum pipe pipe = intel_get_pipe_from_connector(connector);
710 u32 ctl, ctl2, freq;
711
712 ctl2 = I915_READ(BLC_PWM_CTL2);
713 if (ctl2 & BLM_PWM_ENABLE) {
714 WARN(1, "backlight already enabled\n");
715 ctl2 &= ~BLM_PWM_ENABLE;
716 I915_WRITE(BLC_PWM_CTL2, ctl2);
717 }
718
719 freq = panel->backlight.max;
720 if (panel->backlight.combination_mode)
721 freq /= 0xff;
722
723 ctl = freq << 16;
724 I915_WRITE(BLC_PWM_CTL, ctl);
725
726 /* XXX: combine this into above write? */
727 intel_panel_actually_set_backlight(connector, panel->backlight.level);
728
729 ctl2 = BLM_PIPE(pipe);
730 if (panel->backlight.combination_mode)
731 ctl2 |= BLM_COMBINATION_MODE;
732 if (panel->backlight.active_low_pwm)
733 ctl2 |= BLM_POLARITY_I965;
734 I915_WRITE(BLC_PWM_CTL2, ctl2);
735 POSTING_READ(BLC_PWM_CTL2);
736 I915_WRITE(BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE);
737}
738
739static void vlv_enable_backlight(struct intel_connector *connector)
740{
741 struct drm_device *dev = connector->base.dev;
742 struct drm_i915_private *dev_priv = dev->dev_private;
743 struct intel_panel *panel = &connector->panel;
744 enum pipe pipe = intel_get_pipe_from_connector(connector);
745 u32 ctl, ctl2;
746
747 ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe));
748 if (ctl2 & BLM_PWM_ENABLE) {
749 WARN(1, "backlight already enabled\n");
750 ctl2 &= ~BLM_PWM_ENABLE;
751 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
752 }
753
754 ctl = panel->backlight.max << 16;
755 I915_WRITE(VLV_BLC_PWM_CTL(pipe), ctl);
756
757 /* XXX: combine this into above write? */
758 intel_panel_actually_set_backlight(connector, panel->backlight.level);
759
760 ctl2 = 0;
761 if (panel->backlight.active_low_pwm)
762 ctl2 |= BLM_POLARITY_I965;
763 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
764 POSTING_READ(VLV_BLC_PWM_CTL2(pipe));
765 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE);
766}
767
768void intel_panel_enable_backlight(struct intel_connector *connector)
769{
770 struct drm_device *dev = connector->base.dev;
771 struct drm_i915_private *dev_priv = dev->dev_private;
772 struct intel_panel *panel = &connector->panel;
773 enum pipe pipe = intel_get_pipe_from_connector(connector);
774 unsigned long flags;
775
776 if (!panel->backlight.present || pipe == INVALID_PIPE)
777 return;
778
779 DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));
780
781 spin_lock_irqsave(&dev_priv->backlight_lock, flags);
782
783 WARN_ON(panel->backlight.max == 0);
784
785 if (panel->backlight.level == 0) {
786 panel->backlight.level = panel->backlight.max;
787 if (panel->backlight.device)
788 panel->backlight.device->props.brightness =
789 panel->backlight.level;
790 }
791
792 dev_priv->display.enable_backlight(connector);
793 panel->backlight.enabled = true;
794
795 spin_unlock_irqrestore(&dev_priv->backlight_lock, flags);
796}
797
798enum drm_connector_status
799intel_panel_detect(struct drm_device *dev)
800{
801 struct drm_i915_private *dev_priv = dev->dev_private;
802
803 /* Assume that the BIOS does not lie through the OpRegion... */
804 if (!i915.panel_ignore_lid && dev_priv->opregion.lid_state) {
805 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
806 connector_status_connected :
807 connector_status_disconnected;
808 }
809
810 switch (i915.panel_ignore_lid) {
811 case -2:
812 return connector_status_connected;
813 case -1:
814 return connector_status_disconnected;
815 default:
816 return connector_status_unknown;
817 }
818}
819
820#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
821static int intel_backlight_device_update_status(struct backlight_device *bd)
822{
823 struct intel_connector *connector = bl_get_data(bd);
824 struct drm_device *dev = connector->base.dev;
825
826 mutex_lock(&dev->mode_config.mutex);
827 DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n",
828 bd->props.brightness, bd->props.max_brightness);
829 intel_panel_set_backlight(connector, bd->props.brightness,
830 bd->props.max_brightness);
831 mutex_unlock(&dev->mode_config.mutex);
832 return 0;
833}
834
835static int intel_backlight_device_get_brightness(struct backlight_device *bd)
836{
837 struct intel_connector *connector = bl_get_data(bd);
838 struct drm_device *dev = connector->base.dev;
839 struct drm_i915_private *dev_priv = dev->dev_private;
840 int ret;
841
842 intel_runtime_pm_get(dev_priv);
843 mutex_lock(&dev->mode_config.mutex);
844 ret = intel_panel_get_backlight(connector);
845 mutex_unlock(&dev->mode_config.mutex);
846 intel_runtime_pm_put(dev_priv);
847
848 return ret;
849}
850
851static const struct backlight_ops intel_backlight_device_ops = {
852 .update_status = intel_backlight_device_update_status,
853 .get_brightness = intel_backlight_device_get_brightness,
854};
855
856static int intel_backlight_device_register(struct intel_connector *connector)
857{
858 struct intel_panel *panel = &connector->panel;
859 struct backlight_properties props;
860
861 if (WARN_ON(panel->backlight.device))
862 return -ENODEV;
863
864 BUG_ON(panel->backlight.max == 0);
865
866 memset(&props, 0, sizeof(props));
867 props.type = BACKLIGHT_RAW;
868 props.brightness = panel->backlight.level;
869 props.max_brightness = panel->backlight.max;
870
871 /*
872 * Note: using the same name independent of the connector prevents
873 * registration of multiple backlight devices in the driver.
874 */
875 panel->backlight.device =
876 backlight_device_register("intel_backlight",
877 connector->base.kdev,
878 connector,
879 &intel_backlight_device_ops, &props);
880
881 if (IS_ERR(panel->backlight.device)) {
882 DRM_ERROR("Failed to register backlight: %ld\n",
883 PTR_ERR(panel->backlight.device));
884 panel->backlight.device = NULL;
885 return -ENODEV;
886 }
887 return 0;
888}
889
890static void intel_backlight_device_unregister(struct intel_connector *connector)
891{
892 struct intel_panel *panel = &connector->panel;
893
894 if (panel->backlight.device) {
895 backlight_device_unregister(panel->backlight.device);
896 panel->backlight.device = NULL;
897 }
898}
899#else /* CONFIG_BACKLIGHT_CLASS_DEVICE */
900static int intel_backlight_device_register(struct intel_connector *connector)
901{
902 return 0;
903}
904static void intel_backlight_device_unregister(struct intel_connector *connector)
905{
906}
907#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */
908
909/*
910 * Note: The setup hooks can't assume pipe is set!
911 *
912 * XXX: Query mode clock or hardware clock and program PWM modulation frequency
913 * appropriately when it's 0. Use VBT and/or sane defaults.
914 */
915static int bdw_setup_backlight(struct intel_connector *connector)
916{
917 struct drm_device *dev = connector->base.dev;
918 struct drm_i915_private *dev_priv = dev->dev_private;
919 struct intel_panel *panel = &connector->panel;
920 u32 pch_ctl1, pch_ctl2, val;
921
922 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
923 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;
924
925 pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
926 panel->backlight.max = pch_ctl2 >> 16;
927 if (!panel->backlight.max)
928 return -ENODEV;
929
930 val = bdw_get_backlight(connector);
931 panel->backlight.level = intel_panel_compute_brightness(connector, val);
932
933 panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) &&
934 panel->backlight.level != 0;
935
936 return 0;
937}
938
939static int pch_setup_backlight(struct intel_connector *connector)
940{
941 struct drm_device *dev = connector->base.dev;
942 struct drm_i915_private *dev_priv = dev->dev_private;
943 struct intel_panel *panel = &connector->panel;
944 u32 cpu_ctl2, pch_ctl1, pch_ctl2, val;
945
946 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
947 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;
948
949 pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
950 panel->backlight.max = pch_ctl2 >> 16;
951 if (!panel->backlight.max)
952 return -ENODEV;
953
954 val = pch_get_backlight(connector);
955 panel->backlight.level = intel_panel_compute_brightness(connector, val);
956
957 cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
958 panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) &&
959 (pch_ctl1 & BLM_PCH_PWM_ENABLE) && panel->backlight.level != 0;
960
961 return 0;
962}
963
964static int i9xx_setup_backlight(struct intel_connector *connector)
965{
966 struct drm_device *dev = connector->base.dev;
967 struct drm_i915_private *dev_priv = dev->dev_private;
968 struct intel_panel *panel = &connector->panel;
969 u32 ctl, val;
970
971 ctl = I915_READ(BLC_PWM_CTL);
972
973 if (IS_GEN2(dev) || IS_I915GM(dev) || IS_I945GM(dev))
974 panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE;
975
976 if (IS_PINEVIEW(dev))
977 panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV;
978
979 panel->backlight.max = ctl >> 17;
980 if (panel->backlight.combination_mode)
981 panel->backlight.max *= 0xff;
982
983 if (!panel->backlight.max)
984 return -ENODEV;
985
986 val = i9xx_get_backlight(connector);
987 panel->backlight.level = intel_panel_compute_brightness(connector, val);
988
989 panel->backlight.enabled = panel->backlight.level != 0;
990
991 return 0;
992}
993
994static int i965_setup_backlight(struct intel_connector *connector)
995{
996 struct drm_device *dev = connector->base.dev;
997 struct drm_i915_private *dev_priv = dev->dev_private;
998 struct intel_panel *panel = &connector->panel;
999 u32 ctl, ctl2, val;
1000
1001 ctl2 = I915_READ(BLC_PWM_CTL2);
1002 panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE;
1003 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;
1004
1005 ctl = I915_READ(BLC_PWM_CTL);
1006 panel->backlight.max = ctl >> 16;
1007 if (panel->backlight.combination_mode)
1008 panel->backlight.max *= 0xff;
1009
1010 if (!panel->backlight.max)
1011 return -ENODEV;
1012
1013 val = i9xx_get_backlight(connector);
1014 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1015
1016 panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&
1017 panel->backlight.level != 0;
1018
1019 return 0;
1020}
1021
1022static int vlv_setup_backlight(struct intel_connector *connector)
1023{
1024 struct drm_device *dev = connector->base.dev;
1025 struct drm_i915_private *dev_priv = dev->dev_private;
1026 struct intel_panel *panel = &connector->panel;
1027 enum pipe pipe;
1028 u32 ctl, ctl2, val;
1029
1030 for_each_pipe(pipe) {
1031 u32 cur_val = I915_READ(VLV_BLC_PWM_CTL(pipe));
1032
1033 /* Skip if the modulation freq is already set */
1034 if (cur_val & ~BACKLIGHT_DUTY_CYCLE_MASK)
1035 continue;
1036
1037 cur_val &= BACKLIGHT_DUTY_CYCLE_MASK;
1038 I915_WRITE(VLV_BLC_PWM_CTL(pipe), (0xf42 << 16) |
1039 cur_val);
1040 }
1041
1042 ctl2 = I915_READ(VLV_BLC_PWM_CTL2(PIPE_A));
1043 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;
1044
1045 ctl = I915_READ(VLV_BLC_PWM_CTL(PIPE_A));
1046 panel->backlight.max = ctl >> 16;
1047 if (!panel->backlight.max)
1048 return -ENODEV;
1049
1050 val = _vlv_get_backlight(dev, PIPE_A);
1051 panel->backlight.level = intel_panel_compute_brightness(connector, val);
1052
1053 panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&
1054 panel->backlight.level != 0;
1055
1056 return 0;
1057}
1058
1059int intel_panel_setup_backlight(struct drm_connector *connector)
1060{
1061 struct drm_device *dev = connector->dev;
1062 struct drm_i915_private *dev_priv = dev->dev_private;
1063 struct intel_connector *intel_connector = to_intel_connector(connector);
1064 struct intel_panel *panel = &intel_connector->panel;
1065 unsigned long flags;
1066 int ret;
1067
1068 if (!dev_priv->vbt.backlight.present) {
1069 DRM_DEBUG_KMS("native backlight control not available per VBT\n");
1070 return 0;
1071 }
1072
1073 /* set level and max in panel struct */
1074 spin_lock_irqsave(&dev_priv->backlight_lock, flags);
1075 ret = dev_priv->display.setup_backlight(intel_connector);
1076 spin_unlock_irqrestore(&dev_priv->backlight_lock, flags);
1077
1078 if (ret) {
1079 DRM_DEBUG_KMS("failed to setup backlight for connector %s\n",
1080 drm_get_connector_name(connector));
1081 return ret;
1082 }
1083
1084 intel_backlight_device_register(intel_connector);
1085
1086 panel->backlight.present = true;
1087
1088 DRM_DEBUG_KMS("backlight initialized, %s, brightness %u/%u, "
1089 "sysfs interface %sregistered\n",
1090 panel->backlight.enabled ? "enabled" : "disabled",
1091 panel->backlight.level, panel->backlight.max,
1092 panel->backlight.device ? "" : "not ");
1093
1094 return 0;
1095}
1096
1097void intel_panel_destroy_backlight(struct drm_connector *connector)
1098{
1099 struct intel_connector *intel_connector = to_intel_connector(connector);
1100 struct intel_panel *panel = &intel_connector->panel;
1101
1102 panel->backlight.present = false;
1103 intel_backlight_device_unregister(intel_connector);
1104}
1105
1106/**
1107 * intel_find_panel_downclock - find the reduced downclock for LVDS in EDID
1108 * @dev: drm device
1109 * @fixed_mode : panel native mode
1110 * @connector: LVDS/eDP connector
1111 *
1112 * Return downclock_avail
1113 * Find the reduced downclock for LVDS/eDP in EDID.
1114 */
1115struct drm_display_mode *
1116intel_find_panel_downclock(struct drm_device *dev,
1117 struct drm_display_mode *fixed_mode,
1118 struct drm_connector *connector)
1119{
1120 struct drm_display_mode *scan, *tmp_mode;
1121 int temp_downclock;
1122
1123 temp_downclock = fixed_mode->clock;
1124 tmp_mode = NULL;
1125
1126 list_for_each_entry(scan, &connector->probed_modes, head) {
1127 /*
1128 * If one mode has the same resolution with the fixed_panel
1129 * mode while they have the different refresh rate, it means
1130 * that the reduced downclock is found. In such
1131 * case we can set the different FPx0/1 to dynamically select
1132 * between low and high frequency.
1133 */
1134 if (scan->hdisplay == fixed_mode->hdisplay &&
1135 scan->hsync_start == fixed_mode->hsync_start &&
1136 scan->hsync_end == fixed_mode->hsync_end &&
1137 scan->htotal == fixed_mode->htotal &&
1138 scan->vdisplay == fixed_mode->vdisplay &&
1139 scan->vsync_start == fixed_mode->vsync_start &&
1140 scan->vsync_end == fixed_mode->vsync_end &&
1141 scan->vtotal == fixed_mode->vtotal) {
1142 if (scan->clock < temp_downclock) {
1143 /*
1144 * The downclock is already found. But we
1145 * expect to find the lower downclock.
1146 */
1147 temp_downclock = scan->clock;
1148 tmp_mode = scan;
1149 }
1150 }
1151 }
1152
1153 if (temp_downclock < fixed_mode->clock)
1154 return drm_mode_duplicate(dev, tmp_mode);
1155 else
1156 return NULL;
1157}
1158
1159/* Set up chip specific backlight functions */
1160void intel_panel_init_backlight_funcs(struct drm_device *dev)
1161{
1162 struct drm_i915_private *dev_priv = dev->dev_private;
1163
1164 if (IS_BROADWELL(dev)) {
1165 dev_priv->display.setup_backlight = bdw_setup_backlight;
1166 dev_priv->display.enable_backlight = bdw_enable_backlight;
1167 dev_priv->display.disable_backlight = pch_disable_backlight;
1168 dev_priv->display.set_backlight = bdw_set_backlight;
1169 dev_priv->display.get_backlight = bdw_get_backlight;
1170 } else if (HAS_PCH_SPLIT(dev)) {
1171 dev_priv->display.setup_backlight = pch_setup_backlight;
1172 dev_priv->display.enable_backlight = pch_enable_backlight;
1173 dev_priv->display.disable_backlight = pch_disable_backlight;
1174 dev_priv->display.set_backlight = pch_set_backlight;
1175 dev_priv->display.get_backlight = pch_get_backlight;
1176 } else if (IS_VALLEYVIEW(dev)) {
1177 dev_priv->display.setup_backlight = vlv_setup_backlight;
1178 dev_priv->display.enable_backlight = vlv_enable_backlight;
1179 dev_priv->display.disable_backlight = vlv_disable_backlight;
1180 dev_priv->display.set_backlight = vlv_set_backlight;
1181 dev_priv->display.get_backlight = vlv_get_backlight;
1182 } else if (IS_GEN4(dev)) {
1183 dev_priv->display.setup_backlight = i965_setup_backlight;
1184 dev_priv->display.enable_backlight = i965_enable_backlight;
1185 dev_priv->display.disable_backlight = i965_disable_backlight;
1186 dev_priv->display.set_backlight = i9xx_set_backlight;
1187 dev_priv->display.get_backlight = i9xx_get_backlight;
1188 } else {
1189 dev_priv->display.setup_backlight = i9xx_setup_backlight;
1190 dev_priv->display.enable_backlight = i9xx_enable_backlight;
1191 dev_priv->display.disable_backlight = i9xx_disable_backlight;
1192 dev_priv->display.set_backlight = i9xx_set_backlight;
1193 dev_priv->display.get_backlight = i9xx_get_backlight;
1194 }
1195}
1196
1197int intel_panel_init(struct intel_panel *panel,
1198 struct drm_display_mode *fixed_mode,
1199 struct drm_display_mode *downclock_mode)
1200{
1201 panel->fixed_mode = fixed_mode;
1202 panel->downclock_mode = downclock_mode;
1203
1204 return 0;
1205}
1206
1207void intel_panel_fini(struct intel_panel *panel)
1208{
1209 struct intel_connector *intel_connector =
1210 container_of(panel, struct intel_connector, panel);
1211
1212 if (panel->fixed_mode)
1213 drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);
1214
1215 if (panel->downclock_mode)
1216 drm_mode_destroy(intel_connector->base.dev,
1217 panel->downclock_mode);
1218}