1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright © 2006-2007 Intel Corporation
4 *
5 * Authors:
6 * Eric Anholt <eric@anholt.net>
7 * Dave Airlie <airlied@linux.ie>
8 * Jesse Barnes <jesse.barnes@intel.com>
9 */
10
11 #include <linux/i2c.h>
12 #include <linux/pm_runtime.h>
13
14 #include "intel_bios.h"
15 #include "power.h"
16 #include "psb_drv.h"
17 #include "psb_intel_drv.h"
18 #include "psb_intel_reg.h"
19
20 /*
21 * LVDS I2C backlight control macros
22 */
23 #define BRIGHTNESS_MAX_LEVEL 100
24 #define BRIGHTNESS_MASK 0xFF
25 #define BLC_I2C_TYPE 0x01
26 #define BLC_PWM_TYPT 0x02
27
28 #define BLC_POLARITY_NORMAL 0
29 #define BLC_POLARITY_INVERSE 1
30
31 #define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE)
32 #define PSB_BLC_MIN_PWM_REG_FREQ (0x2)
33 #define PSB_BLC_PWM_PRECISION_FACTOR (10)
34 #define PSB_BACKLIGHT_PWM_CTL_SHIFT (16)
35 #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
36
37 struct psb_intel_lvds_priv {
38 /*
39 * Saved LVDO output states
40 */
41 uint32_t savePP_ON;
42 uint32_t savePP_OFF;
43 uint32_t saveLVDS;
44 uint32_t savePP_CONTROL;
45 uint32_t savePP_CYCLE;
46 uint32_t savePFIT_CONTROL;
47 uint32_t savePFIT_PGM_RATIOS;
48 uint32_t saveBLC_PWM_CTL;
49
50 struct psb_intel_i2c_chan *i2c_bus;
51 struct psb_intel_i2c_chan *ddc_bus;
52 };
53
54
55 /*
56 * Returns the maximum level of the backlight duty cycle field.
57 */
psb_intel_lvds_get_max_backlight(struct drm_device * dev)58 static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev)
59 {
60 struct drm_psb_private *dev_priv = dev->dev_private;
61 u32 ret;
62
63 if (gma_power_begin(dev, false)) {
64 ret = REG_READ(BLC_PWM_CTL);
65 gma_power_end(dev);
66 } else /* Powered off, use the saved value */
67 ret = dev_priv->regs.saveBLC_PWM_CTL;
68
69 /* Top 15bits hold the frequency mask */
70 ret = (ret & BACKLIGHT_MODULATION_FREQ_MASK) >>
71 BACKLIGHT_MODULATION_FREQ_SHIFT;
72
73 ret *= 2; /* Return a 16bit range as needed for setting */
74 if (ret == 0)
75 dev_err(dev->dev, "BL bug: Reg %08x save %08X\n",
76 REG_READ(BLC_PWM_CTL), dev_priv->regs.saveBLC_PWM_CTL);
77 return ret;
78 }
79
80 /*
81 * Set LVDS backlight level by I2C command
82 *
83 * FIXME: at some point we need to both track this for PM and also
84 * disable runtime pm on MRST if the brightness is nil (ie blanked)
85 */
psb_lvds_i2c_set_brightness(struct drm_device * dev,unsigned int level)86 static int psb_lvds_i2c_set_brightness(struct drm_device *dev,
87 unsigned int level)
88 {
89 struct drm_psb_private *dev_priv =
90 (struct drm_psb_private *)dev->dev_private;
91
92 struct psb_intel_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus;
93 u8 out_buf[2];
94 unsigned int blc_i2c_brightness;
95
96 struct i2c_msg msgs[] = {
97 {
98 .addr = lvds_i2c_bus->slave_addr,
99 .flags = 0,
100 .len = 2,
101 .buf = out_buf,
102 }
103 };
104
105 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level *
106 BRIGHTNESS_MASK /
107 BRIGHTNESS_MAX_LEVEL);
108
109 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
110 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness;
111
112 out_buf[0] = dev_priv->lvds_bl->brightnesscmd;
113 out_buf[1] = (u8)blc_i2c_brightness;
114
115 if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1) {
116 dev_dbg(dev->dev, "I2C set brightness.(command, value) (%d, %d)\n",
117 dev_priv->lvds_bl->brightnesscmd,
118 blc_i2c_brightness);
119 return 0;
120 }
121
122 dev_err(dev->dev, "I2C transfer error\n");
123 return -1;
124 }
125
126
psb_lvds_pwm_set_brightness(struct drm_device * dev,int level)127 static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level)
128 {
129 struct drm_psb_private *dev_priv =
130 (struct drm_psb_private *)dev->dev_private;
131
132 u32 max_pwm_blc;
133 u32 blc_pwm_duty_cycle;
134
135 max_pwm_blc = psb_intel_lvds_get_max_backlight(dev);
136
137 /*BLC_PWM_CTL Should be initiated while backlight device init*/
138 BUG_ON(max_pwm_blc == 0);
139
140 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL;
141
142 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
143 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle;
144
145 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR;
146 REG_WRITE(BLC_PWM_CTL,
147 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
148 (blc_pwm_duty_cycle));
149
150 dev_info(dev->dev, "Backlight lvds set brightness %08x\n",
151 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
152 (blc_pwm_duty_cycle));
153
154 return 0;
155 }
156
157 /*
158 * Set LVDS backlight level either by I2C or PWM
159 */
psb_intel_lvds_set_brightness(struct drm_device * dev,int level)160 void psb_intel_lvds_set_brightness(struct drm_device *dev, int level)
161 {
162 struct drm_psb_private *dev_priv = dev->dev_private;
163
164 dev_dbg(dev->dev, "backlight level is %d\n", level);
165
166 if (!dev_priv->lvds_bl) {
167 dev_err(dev->dev, "NO LVDS backlight info\n");
168 return;
169 }
170
171 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE)
172 psb_lvds_i2c_set_brightness(dev, level);
173 else
174 psb_lvds_pwm_set_brightness(dev, level);
175 }
176
177 /*
178 * Sets the backlight level.
179 *
180 * level: backlight level, from 0 to psb_intel_lvds_get_max_backlight().
181 */
psb_intel_lvds_set_backlight(struct drm_device * dev,int level)182 static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level)
183 {
184 struct drm_psb_private *dev_priv = dev->dev_private;
185 u32 blc_pwm_ctl;
186
187 if (gma_power_begin(dev, false)) {
188 blc_pwm_ctl = REG_READ(BLC_PWM_CTL);
189 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
190 REG_WRITE(BLC_PWM_CTL,
191 (blc_pwm_ctl |
192 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
193 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
194 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
195 gma_power_end(dev);
196 } else {
197 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &
198 ~BACKLIGHT_DUTY_CYCLE_MASK;
199 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
200 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
201 }
202 }
203
204 /*
205 * Sets the power state for the panel.
206 */
psb_intel_lvds_set_power(struct drm_device * dev,bool on)207 static void psb_intel_lvds_set_power(struct drm_device *dev, bool on)
208 {
209 struct drm_psb_private *dev_priv = dev->dev_private;
210 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
211 u32 pp_status;
212
213 if (!gma_power_begin(dev, true)) {
214 dev_err(dev->dev, "set power, chip off!\n");
215 return;
216 }
217
218 if (on) {
219 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
220 POWER_TARGET_ON);
221 do {
222 pp_status = REG_READ(PP_STATUS);
223 } while ((pp_status & PP_ON) == 0);
224
225 psb_intel_lvds_set_backlight(dev,
226 mode_dev->backlight_duty_cycle);
227 } else {
228 psb_intel_lvds_set_backlight(dev, 0);
229
230 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
231 ~POWER_TARGET_ON);
232 do {
233 pp_status = REG_READ(PP_STATUS);
234 } while (pp_status & PP_ON);
235 }
236
237 gma_power_end(dev);
238 }
239
psb_intel_lvds_encoder_dpms(struct drm_encoder * encoder,int mode)240 static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
241 {
242 struct drm_device *dev = encoder->dev;
243
244 if (mode == DRM_MODE_DPMS_ON)
245 psb_intel_lvds_set_power(dev, true);
246 else
247 psb_intel_lvds_set_power(dev, false);
248
249 /* XXX: We never power down the LVDS pairs. */
250 }
251
psb_intel_lvds_save(struct drm_connector * connector)252 static void psb_intel_lvds_save(struct drm_connector *connector)
253 {
254 struct drm_device *dev = connector->dev;
255 struct drm_psb_private *dev_priv =
256 (struct drm_psb_private *)dev->dev_private;
257 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
258 struct psb_intel_lvds_priv *lvds_priv =
259 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv;
260
261 lvds_priv->savePP_ON = REG_READ(LVDSPP_ON);
262 lvds_priv->savePP_OFF = REG_READ(LVDSPP_OFF);
263 lvds_priv->saveLVDS = REG_READ(LVDS);
264 lvds_priv->savePP_CONTROL = REG_READ(PP_CONTROL);
265 lvds_priv->savePP_CYCLE = REG_READ(PP_CYCLE);
266 /*lvds_priv->savePP_DIVISOR = REG_READ(PP_DIVISOR);*/
267 lvds_priv->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
268 lvds_priv->savePFIT_CONTROL = REG_READ(PFIT_CONTROL);
269 lvds_priv->savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS);
270
271 /*TODO: move backlight_duty_cycle to psb_intel_lvds_priv*/
272 dev_priv->backlight_duty_cycle = (dev_priv->regs.saveBLC_PWM_CTL &
273 BACKLIGHT_DUTY_CYCLE_MASK);
274
275 /*
276 * If the light is off at server startup,
277 * just make it full brightness
278 */
279 if (dev_priv->backlight_duty_cycle == 0)
280 dev_priv->backlight_duty_cycle =
281 psb_intel_lvds_get_max_backlight(dev);
282
283 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n",
284 lvds_priv->savePP_ON,
285 lvds_priv->savePP_OFF,
286 lvds_priv->saveLVDS,
287 lvds_priv->savePP_CONTROL,
288 lvds_priv->savePP_CYCLE,
289 lvds_priv->saveBLC_PWM_CTL);
290 }
291
psb_intel_lvds_restore(struct drm_connector * connector)292 static void psb_intel_lvds_restore(struct drm_connector *connector)
293 {
294 struct drm_device *dev = connector->dev;
295 u32 pp_status;
296 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
297 struct psb_intel_lvds_priv *lvds_priv =
298 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv;
299
300 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n",
301 lvds_priv->savePP_ON,
302 lvds_priv->savePP_OFF,
303 lvds_priv->saveLVDS,
304 lvds_priv->savePP_CONTROL,
305 lvds_priv->savePP_CYCLE,
306 lvds_priv->saveBLC_PWM_CTL);
307
308 REG_WRITE(BLC_PWM_CTL, lvds_priv->saveBLC_PWM_CTL);
309 REG_WRITE(PFIT_CONTROL, lvds_priv->savePFIT_CONTROL);
310 REG_WRITE(PFIT_PGM_RATIOS, lvds_priv->savePFIT_PGM_RATIOS);
311 REG_WRITE(LVDSPP_ON, lvds_priv->savePP_ON);
312 REG_WRITE(LVDSPP_OFF, lvds_priv->savePP_OFF);
313 /*REG_WRITE(PP_DIVISOR, lvds_priv->savePP_DIVISOR);*/
314 REG_WRITE(PP_CYCLE, lvds_priv->savePP_CYCLE);
315 REG_WRITE(PP_CONTROL, lvds_priv->savePP_CONTROL);
316 REG_WRITE(LVDS, lvds_priv->saveLVDS);
317
318 if (lvds_priv->savePP_CONTROL & POWER_TARGET_ON) {
319 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
320 POWER_TARGET_ON);
321 do {
322 pp_status = REG_READ(PP_STATUS);
323 } while ((pp_status & PP_ON) == 0);
324 } else {
325 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
326 ~POWER_TARGET_ON);
327 do {
328 pp_status = REG_READ(PP_STATUS);
329 } while (pp_status & PP_ON);
330 }
331 }
332
psb_intel_lvds_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)333 enum drm_mode_status psb_intel_lvds_mode_valid(struct drm_connector *connector,
334 struct drm_display_mode *mode)
335 {
336 struct drm_psb_private *dev_priv = connector->dev->dev_private;
337 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
338 struct drm_display_mode *fixed_mode =
339 dev_priv->mode_dev.panel_fixed_mode;
340
341 if (gma_encoder->type == INTEL_OUTPUT_MIPI2)
342 fixed_mode = dev_priv->mode_dev.panel_fixed_mode2;
343
344 /* just in case */
345 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
346 return MODE_NO_DBLESCAN;
347
348 /* just in case */
349 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
350 return MODE_NO_INTERLACE;
351
352 if (fixed_mode) {
353 if (mode->hdisplay > fixed_mode->hdisplay)
354 return MODE_PANEL;
355 if (mode->vdisplay > fixed_mode->vdisplay)
356 return MODE_PANEL;
357 }
358 return MODE_OK;
359 }
360
psb_intel_lvds_mode_fixup(struct drm_encoder * encoder,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)361 bool psb_intel_lvds_mode_fixup(struct drm_encoder *encoder,
362 const struct drm_display_mode *mode,
363 struct drm_display_mode *adjusted_mode)
364 {
365 struct drm_device *dev = encoder->dev;
366 struct drm_psb_private *dev_priv = dev->dev_private;
367 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
368 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc);
369 struct drm_encoder *tmp_encoder;
370 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;
371 struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
372
373 if (gma_encoder->type == INTEL_OUTPUT_MIPI2)
374 panel_fixed_mode = mode_dev->panel_fixed_mode2;
375
376 /* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */
377 if (!IS_MRST(dev) && gma_crtc->pipe == 0) {
378 pr_err("Can't support LVDS on pipe A\n");
379 return false;
380 }
381 if (IS_MRST(dev) && gma_crtc->pipe != 0) {
382 pr_err("Must use PIPE A\n");
383 return false;
384 }
385 /* Should never happen!! */
386 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,
387 head) {
388 if (tmp_encoder != encoder
389 && tmp_encoder->crtc == encoder->crtc) {
390 pr_err("Can't enable LVDS and another encoder on the same pipe\n");
391 return false;
392 }
393 }
394
395 /*
396 * If we have timings from the BIOS for the panel, put them in
397 * to the adjusted mode. The CRTC will be set up for this mode,
398 * with the panel scaling set up to source from the H/VDisplay
399 * of the original mode.
400 */
401 if (panel_fixed_mode != NULL) {
402 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;
403 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;
404 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;
405 adjusted_mode->htotal = panel_fixed_mode->htotal;
406 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;
407 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;
408 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;
409 adjusted_mode->vtotal = panel_fixed_mode->vtotal;
410 adjusted_mode->clock = panel_fixed_mode->clock;
411 drm_mode_set_crtcinfo(adjusted_mode,
412 CRTC_INTERLACE_HALVE_V);
413 }
414
415 /*
416 * XXX: It would be nice to support lower refresh rates on the
417 * panels to reduce power consumption, and perhaps match the
418 * user's requested refresh rate.
419 */
420
421 return true;
422 }
423
psb_intel_lvds_prepare(struct drm_encoder * encoder)424 static void psb_intel_lvds_prepare(struct drm_encoder *encoder)
425 {
426 struct drm_device *dev = encoder->dev;
427 struct drm_psb_private *dev_priv = dev->dev_private;
428 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
429
430 if (!gma_power_begin(dev, true))
431 return;
432
433 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
434 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &
435 BACKLIGHT_DUTY_CYCLE_MASK);
436
437 psb_intel_lvds_set_power(dev, false);
438
439 gma_power_end(dev);
440 }
441
psb_intel_lvds_commit(struct drm_encoder * encoder)442 static void psb_intel_lvds_commit(struct drm_encoder *encoder)
443 {
444 struct drm_device *dev = encoder->dev;
445 struct drm_psb_private *dev_priv = dev->dev_private;
446 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
447
448 if (mode_dev->backlight_duty_cycle == 0)
449 mode_dev->backlight_duty_cycle =
450 psb_intel_lvds_get_max_backlight(dev);
451
452 psb_intel_lvds_set_power(dev, true);
453 }
454
psb_intel_lvds_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)455 static void psb_intel_lvds_mode_set(struct drm_encoder *encoder,
456 struct drm_display_mode *mode,
457 struct drm_display_mode *adjusted_mode)
458 {
459 struct drm_device *dev = encoder->dev;
460 struct drm_psb_private *dev_priv = dev->dev_private;
461 u32 pfit_control;
462
463 /*
464 * The LVDS pin pair will already have been turned on in the
465 * psb_intel_crtc_mode_set since it has a large impact on the DPLL
466 * settings.
467 */
468
469 /*
470 * Enable automatic panel scaling so that non-native modes fill the
471 * screen. Should be enabled before the pipe is enabled, according to
472 * register description and PRM.
473 */
474 if (mode->hdisplay != adjusted_mode->hdisplay ||
475 mode->vdisplay != adjusted_mode->vdisplay)
476 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
477 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
478 HORIZ_INTERP_BILINEAR);
479 else
480 pfit_control = 0;
481
482 if (dev_priv->lvds_dither)
483 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
484
485 REG_WRITE(PFIT_CONTROL, pfit_control);
486 }
487
488 /*
489 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
490 */
psb_intel_lvds_get_modes(struct drm_connector * connector)491 static int psb_intel_lvds_get_modes(struct drm_connector *connector)
492 {
493 struct drm_device *dev = connector->dev;
494 struct drm_psb_private *dev_priv = dev->dev_private;
495 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
496 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
497 struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv;
498 int ret = 0;
499
500 if (!IS_MRST(dev))
501 ret = psb_intel_ddc_get_modes(connector, &lvds_priv->i2c_bus->adapter);
502
503 if (ret)
504 return ret;
505
506 if (mode_dev->panel_fixed_mode != NULL) {
507 struct drm_display_mode *mode =
508 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
509 drm_mode_probed_add(connector, mode);
510 return 1;
511 }
512
513 return 0;
514 }
515
516 /**
517 * psb_intel_lvds_destroy - unregister and free LVDS structures
518 * @connector: connector to free
519 *
520 * Unregister the DDC bus for this connector then free the driver private
521 * structure.
522 */
psb_intel_lvds_destroy(struct drm_connector * connector)523 void psb_intel_lvds_destroy(struct drm_connector *connector)
524 {
525 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
526 struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv;
527
528 psb_intel_i2c_destroy(lvds_priv->ddc_bus);
529 drm_connector_unregister(connector);
530 drm_connector_cleanup(connector);
531 kfree(connector);
532 }
533
psb_intel_lvds_set_property(struct drm_connector * connector,struct drm_property * property,uint64_t value)534 int psb_intel_lvds_set_property(struct drm_connector *connector,
535 struct drm_property *property,
536 uint64_t value)
537 {
538 struct drm_encoder *encoder = connector->encoder;
539
540 if (!encoder)
541 return -1;
542
543 if (!strcmp(property->name, "scaling mode")) {
544 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
545 uint64_t curval;
546
547 if (!crtc)
548 goto set_prop_error;
549
550 switch (value) {
551 case DRM_MODE_SCALE_FULLSCREEN:
552 break;
553 case DRM_MODE_SCALE_NO_SCALE:
554 break;
555 case DRM_MODE_SCALE_ASPECT:
556 break;
557 default:
558 goto set_prop_error;
559 }
560
561 if (drm_object_property_get_value(&connector->base,
562 property,
563 &curval))
564 goto set_prop_error;
565
566 if (curval == value)
567 goto set_prop_done;
568
569 if (drm_object_property_set_value(&connector->base,
570 property,
571 value))
572 goto set_prop_error;
573
574 if (crtc->saved_mode.hdisplay != 0 &&
575 crtc->saved_mode.vdisplay != 0) {
576 if (!drm_crtc_helper_set_mode(encoder->crtc,
577 &crtc->saved_mode,
578 encoder->crtc->x,
579 encoder->crtc->y,
580 encoder->crtc->primary->fb))
581 goto set_prop_error;
582 }
583 } else if (!strcmp(property->name, "backlight")) {
584 if (drm_object_property_set_value(&connector->base,
585 property,
586 value))
587 goto set_prop_error;
588 else
589 gma_backlight_set(encoder->dev, value);
590 } else if (!strcmp(property->name, "DPMS")) {
591 const struct drm_encoder_helper_funcs *hfuncs
592 = encoder->helper_private;
593 hfuncs->dpms(encoder, value);
594 }
595
596 set_prop_done:
597 return 0;
598 set_prop_error:
599 return -1;
600 }
601
602 static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = {
603 .dpms = psb_intel_lvds_encoder_dpms,
604 .mode_fixup = psb_intel_lvds_mode_fixup,
605 .prepare = psb_intel_lvds_prepare,
606 .mode_set = psb_intel_lvds_mode_set,
607 .commit = psb_intel_lvds_commit,
608 };
609
610 const struct drm_connector_helper_funcs
611 psb_intel_lvds_connector_helper_funcs = {
612 .get_modes = psb_intel_lvds_get_modes,
613 .mode_valid = psb_intel_lvds_mode_valid,
614 .best_encoder = gma_best_encoder,
615 };
616
617 const struct drm_connector_funcs psb_intel_lvds_connector_funcs = {
618 .dpms = drm_helper_connector_dpms,
619 .fill_modes = drm_helper_probe_single_connector_modes,
620 .set_property = psb_intel_lvds_set_property,
621 .destroy = psb_intel_lvds_destroy,
622 };
623
624
psb_intel_lvds_enc_destroy(struct drm_encoder * encoder)625 static void psb_intel_lvds_enc_destroy(struct drm_encoder *encoder)
626 {
627 drm_encoder_cleanup(encoder);
628 }
629
630 const struct drm_encoder_funcs psb_intel_lvds_enc_funcs = {
631 .destroy = psb_intel_lvds_enc_destroy,
632 };
633
634
635
636 /**
637 * psb_intel_lvds_init - setup LVDS connectors on this device
638 * @dev: drm device
639 *
640 * Create the connector, register the LVDS DDC bus, and try to figure out what
641 * modes we can display on the LVDS panel (if present).
642 */
psb_intel_lvds_init(struct drm_device * dev,struct psb_intel_mode_device * mode_dev)643 void psb_intel_lvds_init(struct drm_device *dev,
644 struct psb_intel_mode_device *mode_dev)
645 {
646 struct gma_encoder *gma_encoder;
647 struct gma_connector *gma_connector;
648 struct psb_intel_lvds_priv *lvds_priv;
649 struct drm_connector *connector;
650 struct drm_encoder *encoder;
651 struct drm_display_mode *scan; /* *modes, *bios_mode; */
652 struct drm_crtc *crtc;
653 struct drm_psb_private *dev_priv = dev->dev_private;
654 u32 lvds;
655 int pipe;
656
657 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
658 if (!gma_encoder) {
659 dev_err(dev->dev, "gma_encoder allocation error\n");
660 return;
661 }
662
663 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
664 if (!gma_connector) {
665 dev_err(dev->dev, "gma_connector allocation error\n");
666 goto failed_encoder;
667 }
668
669 lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL);
670 if (!lvds_priv) {
671 dev_err(dev->dev, "LVDS private allocation error\n");
672 goto failed_connector;
673 }
674
675 gma_encoder->dev_priv = lvds_priv;
676
677 connector = &gma_connector->base;
678 gma_connector->save = psb_intel_lvds_save;
679 gma_connector->restore = psb_intel_lvds_restore;
680
681 encoder = &gma_encoder->base;
682 drm_connector_init(dev, connector,
683 &psb_intel_lvds_connector_funcs,
684 DRM_MODE_CONNECTOR_LVDS);
685
686 drm_encoder_init(dev, encoder,
687 &psb_intel_lvds_enc_funcs,
688 DRM_MODE_ENCODER_LVDS, NULL);
689
690 gma_connector_attach_encoder(gma_connector, gma_encoder);
691 gma_encoder->type = INTEL_OUTPUT_LVDS;
692
693 drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs);
694 drm_connector_helper_add(connector,
695 &psb_intel_lvds_connector_helper_funcs);
696 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
697 connector->interlace_allowed = false;
698 connector->doublescan_allowed = false;
699
700 /*Attach connector properties*/
701 drm_object_attach_property(&connector->base,
702 dev->mode_config.scaling_mode_property,
703 DRM_MODE_SCALE_FULLSCREEN);
704 drm_object_attach_property(&connector->base,
705 dev_priv->backlight_property,
706 BRIGHTNESS_MAX_LEVEL);
707
708 /*
709 * Set up I2C bus
710 * FIXME: distroy i2c_bus when exit
711 */
712 lvds_priv->i2c_bus = psb_intel_i2c_create(dev, GPIOB, "LVDSBLC_B");
713 if (!lvds_priv->i2c_bus) {
714 dev_printk(KERN_ERR,
715 &dev->pdev->dev, "I2C bus registration failed.\n");
716 goto failed_blc_i2c;
717 }
718 lvds_priv->i2c_bus->slave_addr = 0x2C;
719 dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus;
720
721 /*
722 * LVDS discovery:
723 * 1) check for EDID on DDC
724 * 2) check for VBT data
725 * 3) check to see if LVDS is already on
726 * if none of the above, no panel
727 * 4) make sure lid is open
728 * if closed, act like it's not there for now
729 */
730
731 /* Set up the DDC bus. */
732 lvds_priv->ddc_bus = psb_intel_i2c_create(dev, GPIOC, "LVDSDDC_C");
733 if (!lvds_priv->ddc_bus) {
734 dev_printk(KERN_ERR, &dev->pdev->dev,
735 "DDC bus registration " "failed.\n");
736 goto failed_ddc;
737 }
738
739 /*
740 * Attempt to get the fixed panel mode from DDC. Assume that the
741 * preferred mode is the right one.
742 */
743 mutex_lock(&dev->mode_config.mutex);
744 psb_intel_ddc_get_modes(connector, &lvds_priv->ddc_bus->adapter);
745 list_for_each_entry(scan, &connector->probed_modes, head) {
746 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
747 mode_dev->panel_fixed_mode =
748 drm_mode_duplicate(dev, scan);
749 DRM_DEBUG_KMS("Using mode from DDC\n");
750 goto out; /* FIXME: check for quirks */
751 }
752 }
753
754 /* Failed to get EDID, what about VBT? do we need this? */
755 if (dev_priv->lfp_lvds_vbt_mode) {
756 mode_dev->panel_fixed_mode =
757 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
758
759 if (mode_dev->panel_fixed_mode) {
760 mode_dev->panel_fixed_mode->type |=
761 DRM_MODE_TYPE_PREFERRED;
762 DRM_DEBUG_KMS("Using mode from VBT\n");
763 goto out;
764 }
765 }
766
767 /*
768 * If we didn't get EDID, try checking if the panel is already turned
769 * on. If so, assume that whatever is currently programmed is the
770 * correct mode.
771 */
772 lvds = REG_READ(LVDS);
773 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
774 crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
775
776 if (crtc && (lvds & LVDS_PORT_EN)) {
777 mode_dev->panel_fixed_mode =
778 psb_intel_crtc_mode_get(dev, crtc);
779 if (mode_dev->panel_fixed_mode) {
780 mode_dev->panel_fixed_mode->type |=
781 DRM_MODE_TYPE_PREFERRED;
782 DRM_DEBUG_KMS("Using pre-programmed mode\n");
783 goto out; /* FIXME: check for quirks */
784 }
785 }
786
787 /* If we still don't have a mode after all that, give up. */
788 if (!mode_dev->panel_fixed_mode) {
789 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n");
790 goto failed_find;
791 }
792
793 /*
794 * Blacklist machines with BIOSes that list an LVDS panel without
795 * actually having one.
796 */
797 out:
798 mutex_unlock(&dev->mode_config.mutex);
799 drm_connector_register(connector);
800 return;
801
802 failed_find:
803 mutex_unlock(&dev->mode_config.mutex);
804 psb_intel_i2c_destroy(lvds_priv->ddc_bus);
805 failed_ddc:
806 psb_intel_i2c_destroy(lvds_priv->i2c_bus);
807 failed_blc_i2c:
808 drm_encoder_cleanup(encoder);
809 drm_connector_cleanup(connector);
810 failed_connector:
811 kfree(gma_connector);
812 failed_encoder:
813 kfree(gma_encoder);
814 }
815
816