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