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_crtc_helper.h>
15 #include <drm/drm_modeset_helper_vtables.h>
16 #include <drm/drm_simple_kms_helper.h>
17
18 #include "intel_bios.h"
19 #include "power.h"
20 #include "psb_drv.h"
21 #include "psb_intel_drv.h"
22 #include "psb_intel_reg.h"
23
24 /*
25 * LVDS I2C backlight control macros
26 */
27 #define BRIGHTNESS_MAX_LEVEL 100
28 #define BRIGHTNESS_MASK 0xFF
29 #define BLC_I2C_TYPE 0x01
30 #define BLC_PWM_TYPT 0x02
31
32 #define BLC_POLARITY_NORMAL 0
33 #define BLC_POLARITY_INVERSE 1
34
35 #define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE)
36 #define PSB_BLC_MIN_PWM_REG_FREQ (0x2)
37 #define PSB_BLC_PWM_PRECISION_FACTOR (10)
38 #define PSB_BACKLIGHT_PWM_CTL_SHIFT (16)
39 #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
40
41 struct psb_intel_lvds_priv {
42 /*
43 * Saved LVDO output states
44 */
45 uint32_t savePP_ON;
46 uint32_t savePP_OFF;
47 uint32_t saveLVDS;
48 uint32_t savePP_CONTROL;
49 uint32_t savePP_CYCLE;
50 uint32_t savePFIT_CONTROL;
51 uint32_t savePFIT_PGM_RATIOS;
52 uint32_t saveBLC_PWM_CTL;
53
54 struct gma_i2c_chan *i2c_bus;
55 };
56
57
58 /*
59 * Returns the maximum level of the backlight duty cycle field.
60 */
psb_intel_lvds_get_max_backlight(struct drm_device * dev)61 static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev)
62 {
63 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
64 u32 ret;
65
66 if (gma_power_begin(dev, false)) {
67 ret = REG_READ(BLC_PWM_CTL);
68 gma_power_end(dev);
69 } else /* Powered off, use the saved value */
70 ret = dev_priv->regs.saveBLC_PWM_CTL;
71
72 /* Top 15bits hold the frequency mask */
73 ret = (ret & BACKLIGHT_MODULATION_FREQ_MASK) >>
74 BACKLIGHT_MODULATION_FREQ_SHIFT;
75
76 ret *= 2; /* Return a 16bit range as needed for setting */
77 if (ret == 0)
78 dev_err(dev->dev, "BL bug: Reg %08x save %08X\n",
79 REG_READ(BLC_PWM_CTL), dev_priv->regs.saveBLC_PWM_CTL);
80 return ret;
81 }
82
83 /*
84 * Set LVDS backlight level by I2C command
85 *
86 * FIXME: at some point we need to both track this for PM and also
87 * disable runtime pm on MRST if the brightness is nil (ie blanked)
88 */
psb_lvds_i2c_set_brightness(struct drm_device * dev,unsigned int level)89 static int psb_lvds_i2c_set_brightness(struct drm_device *dev,
90 unsigned int level)
91 {
92 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
93
94 struct gma_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus;
95 u8 out_buf[2];
96 unsigned int blc_i2c_brightness;
97
98 struct i2c_msg msgs[] = {
99 {
100 .addr = lvds_i2c_bus->slave_addr,
101 .flags = 0,
102 .len = 2,
103 .buf = out_buf,
104 }
105 };
106
107 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level *
108 BRIGHTNESS_MASK /
109 BRIGHTNESS_MAX_LEVEL);
110
111 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
112 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness;
113
114 out_buf[0] = dev_priv->lvds_bl->brightnesscmd;
115 out_buf[1] = (u8)blc_i2c_brightness;
116
117 if (i2c_transfer(&lvds_i2c_bus->base, msgs, 1) == 1) {
118 dev_dbg(dev->dev, "I2C set brightness.(command, value) (%d, %d)\n",
119 dev_priv->lvds_bl->brightnesscmd,
120 blc_i2c_brightness);
121 return 0;
122 }
123
124 dev_err(dev->dev, "I2C transfer error\n");
125 return -1;
126 }
127
128
psb_lvds_pwm_set_brightness(struct drm_device * dev,int level)129 static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level)
130 {
131 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
132
133 u32 max_pwm_blc;
134 u32 blc_pwm_duty_cycle;
135
136 max_pwm_blc = psb_intel_lvds_get_max_backlight(dev);
137
138 /*BLC_PWM_CTL Should be initiated while backlight device init*/
139 BUG_ON(max_pwm_blc == 0);
140
141 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL;
142
143 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
144 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle;
145
146 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR;
147 REG_WRITE(BLC_PWM_CTL,
148 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
149 (blc_pwm_duty_cycle));
150
151 dev_info(dev->dev, "Backlight lvds set brightness %08x\n",
152 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
153 (blc_pwm_duty_cycle));
154
155 return 0;
156 }
157
158 /*
159 * Set LVDS backlight level either by I2C or PWM
160 */
psb_intel_lvds_set_brightness(struct drm_device * dev,int level)161 void psb_intel_lvds_set_brightness(struct drm_device *dev, int level)
162 {
163 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
164
165 dev_dbg(dev->dev, "backlight level is %d\n", level);
166
167 if (!dev_priv->lvds_bl) {
168 dev_err(dev->dev, "NO LVDS backlight info\n");
169 return;
170 }
171
172 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE)
173 psb_lvds_i2c_set_brightness(dev, level);
174 else
175 psb_lvds_pwm_set_brightness(dev, level);
176 }
177
178 /*
179 * Sets the backlight level.
180 *
181 * level: backlight level, from 0 to psb_intel_lvds_get_max_backlight().
182 */
psb_intel_lvds_set_backlight(struct drm_device * dev,int level)183 static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level)
184 {
185 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
186 u32 blc_pwm_ctl;
187
188 if (gma_power_begin(dev, false)) {
189 blc_pwm_ctl = REG_READ(BLC_PWM_CTL);
190 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
191 REG_WRITE(BLC_PWM_CTL,
192 (blc_pwm_ctl |
193 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
194 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
195 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
196 gma_power_end(dev);
197 } else {
198 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &
199 ~BACKLIGHT_DUTY_CYCLE_MASK;
200 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
201 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
202 }
203 }
204
205 /*
206 * Sets the power state for the panel.
207 */
psb_intel_lvds_set_power(struct drm_device * dev,bool on)208 static void psb_intel_lvds_set_power(struct drm_device *dev, bool on)
209 {
210 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
211 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
212 u32 pp_status;
213
214 if (!gma_power_begin(dev, true)) {
215 dev_err(dev->dev, "set power, chip off!\n");
216 return;
217 }
218
219 if (on) {
220 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
221 POWER_TARGET_ON);
222 do {
223 pp_status = REG_READ(PP_STATUS);
224 } while ((pp_status & PP_ON) == 0);
225
226 psb_intel_lvds_set_backlight(dev,
227 mode_dev->backlight_duty_cycle);
228 } else {
229 psb_intel_lvds_set_backlight(dev, 0);
230
231 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
232 ~POWER_TARGET_ON);
233 do {
234 pp_status = REG_READ(PP_STATUS);
235 } while (pp_status & PP_ON);
236 }
237
238 gma_power_end(dev);
239 }
240
psb_intel_lvds_encoder_dpms(struct drm_encoder * encoder,int mode)241 static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
242 {
243 struct drm_device *dev = encoder->dev;
244
245 if (mode == DRM_MODE_DPMS_ON)
246 psb_intel_lvds_set_power(dev, true);
247 else
248 psb_intel_lvds_set_power(dev, false);
249
250 /* XXX: We never power down the LVDS pairs. */
251 }
252
psb_intel_lvds_save(struct drm_connector * connector)253 static void psb_intel_lvds_save(struct drm_connector *connector)
254 {
255 struct drm_device *dev = connector->dev;
256 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
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 = to_drm_psb_private(connector->dev);
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 = to_drm_psb_private(dev);
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 = to_drm_psb_private(dev);
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 = to_drm_psb_private(dev);
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 = to_drm_psb_private(dev);
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 = to_drm_psb_private(dev);
495 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
496 int ret = 0;
497
498 if (!IS_MRST(dev))
499 ret = psb_intel_ddc_get_modes(connector, connector->ddc);
500
501 if (ret)
502 return ret;
503
504 if (mode_dev->panel_fixed_mode != NULL) {
505 struct drm_display_mode *mode =
506 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
507 drm_mode_probed_add(connector, mode);
508 return 1;
509 }
510
511 return 0;
512 }
513
psb_intel_lvds_destroy(struct drm_connector * connector)514 void psb_intel_lvds_destroy(struct drm_connector *connector)
515 {
516 struct gma_connector *gma_connector = to_gma_connector(connector);
517 struct gma_i2c_chan *ddc_bus = to_gma_i2c_chan(connector->ddc);
518
519 gma_i2c_destroy(ddc_bus);
520 drm_connector_cleanup(connector);
521 kfree(gma_connector);
522 }
523
psb_intel_lvds_set_property(struct drm_connector * connector,struct drm_property * property,uint64_t value)524 int psb_intel_lvds_set_property(struct drm_connector *connector,
525 struct drm_property *property,
526 uint64_t value)
527 {
528 struct drm_encoder *encoder = connector->encoder;
529
530 if (!encoder)
531 return -1;
532
533 if (!strcmp(property->name, "scaling mode")) {
534 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
535 uint64_t curval;
536
537 if (!crtc)
538 goto set_prop_error;
539
540 switch (value) {
541 case DRM_MODE_SCALE_FULLSCREEN:
542 break;
543 case DRM_MODE_SCALE_NO_SCALE:
544 break;
545 case DRM_MODE_SCALE_ASPECT:
546 break;
547 default:
548 goto set_prop_error;
549 }
550
551 if (drm_object_property_get_value(&connector->base,
552 property,
553 &curval))
554 goto set_prop_error;
555
556 if (curval == value)
557 goto set_prop_done;
558
559 if (drm_object_property_set_value(&connector->base,
560 property,
561 value))
562 goto set_prop_error;
563
564 if (crtc->saved_mode.hdisplay != 0 &&
565 crtc->saved_mode.vdisplay != 0) {
566 if (!drm_crtc_helper_set_mode(encoder->crtc,
567 &crtc->saved_mode,
568 encoder->crtc->x,
569 encoder->crtc->y,
570 encoder->crtc->primary->fb))
571 goto set_prop_error;
572 }
573 } else if (!strcmp(property->name, "backlight")) {
574 if (drm_object_property_set_value(&connector->base,
575 property,
576 value))
577 goto set_prop_error;
578 else
579 gma_backlight_set(encoder->dev, value);
580 } else if (!strcmp(property->name, "DPMS")) {
581 const struct drm_encoder_helper_funcs *hfuncs
582 = encoder->helper_private;
583 hfuncs->dpms(encoder, value);
584 }
585
586 set_prop_done:
587 return 0;
588 set_prop_error:
589 return -1;
590 }
591
592 static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = {
593 .dpms = psb_intel_lvds_encoder_dpms,
594 .mode_fixup = psb_intel_lvds_mode_fixup,
595 .prepare = psb_intel_lvds_prepare,
596 .mode_set = psb_intel_lvds_mode_set,
597 .commit = psb_intel_lvds_commit,
598 };
599
600 const struct drm_connector_helper_funcs
601 psb_intel_lvds_connector_helper_funcs = {
602 .get_modes = psb_intel_lvds_get_modes,
603 .mode_valid = psb_intel_lvds_mode_valid,
604 .best_encoder = gma_best_encoder,
605 };
606
607 const struct drm_connector_funcs psb_intel_lvds_connector_funcs = {
608 .dpms = drm_helper_connector_dpms,
609 .fill_modes = drm_helper_probe_single_connector_modes,
610 .set_property = psb_intel_lvds_set_property,
611 .destroy = psb_intel_lvds_destroy,
612 };
613
614 /**
615 * psb_intel_lvds_init - setup LVDS connectors on this device
616 * @dev: drm device
617 * @mode_dev: mode device
618 *
619 * Create the connector, register the LVDS DDC bus, and try to figure out what
620 * modes we can display on the LVDS panel (if present).
621 */
psb_intel_lvds_init(struct drm_device * dev,struct psb_intel_mode_device * mode_dev)622 void psb_intel_lvds_init(struct drm_device *dev,
623 struct psb_intel_mode_device *mode_dev)
624 {
625 struct gma_encoder *gma_encoder;
626 struct gma_connector *gma_connector;
627 struct psb_intel_lvds_priv *lvds_priv;
628 struct drm_connector *connector;
629 struct drm_encoder *encoder;
630 struct drm_display_mode *scan; /* *modes, *bios_mode; */
631 struct drm_crtc *crtc;
632 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
633 struct gma_i2c_chan *ddc_bus;
634 u32 lvds;
635 int pipe;
636 int ret;
637
638 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
639 if (!gma_encoder) {
640 dev_err(dev->dev, "gma_encoder allocation error\n");
641 return;
642 }
643 encoder = &gma_encoder->base;
644
645 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
646 if (!gma_connector) {
647 dev_err(dev->dev, "gma_connector allocation error\n");
648 goto err_free_encoder;
649 }
650
651 lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL);
652 if (!lvds_priv) {
653 dev_err(dev->dev, "LVDS private allocation error\n");
654 goto err_free_connector;
655 }
656
657 gma_encoder->dev_priv = lvds_priv;
658
659 connector = &gma_connector->base;
660 gma_connector->save = psb_intel_lvds_save;
661 gma_connector->restore = psb_intel_lvds_restore;
662
663 /* Set up the DDC bus. */
664 ddc_bus = gma_i2c_create(dev, GPIOC, "LVDSDDC_C");
665 if (!ddc_bus) {
666 dev_printk(KERN_ERR, dev->dev,
667 "DDC bus registration " "failed.\n");
668 goto err_free_lvds_priv;
669 }
670
671 ret = drm_connector_init_with_ddc(dev, connector,
672 &psb_intel_lvds_connector_funcs,
673 DRM_MODE_CONNECTOR_LVDS,
674 &ddc_bus->base);
675 if (ret)
676 goto err_ddc_destroy;
677
678 ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS);
679 if (ret)
680 goto err_connector_cleanup;
681
682 gma_connector_attach_encoder(gma_connector, gma_encoder);
683 gma_encoder->type = INTEL_OUTPUT_LVDS;
684
685 drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs);
686 drm_connector_helper_add(connector,
687 &psb_intel_lvds_connector_helper_funcs);
688 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
689 connector->interlace_allowed = false;
690 connector->doublescan_allowed = false;
691
692 /*Attach connector properties*/
693 drm_object_attach_property(&connector->base,
694 dev->mode_config.scaling_mode_property,
695 DRM_MODE_SCALE_FULLSCREEN);
696 drm_object_attach_property(&connector->base,
697 dev_priv->backlight_property,
698 BRIGHTNESS_MAX_LEVEL);
699
700 /*
701 * Set up I2C bus
702 * FIXME: distroy i2c_bus when exit
703 */
704 lvds_priv->i2c_bus = gma_i2c_create(dev, GPIOB, "LVDSBLC_B");
705 if (!lvds_priv->i2c_bus) {
706 dev_printk(KERN_ERR,
707 dev->dev, "I2C bus registration failed.\n");
708 goto err_encoder_cleanup;
709 }
710 lvds_priv->i2c_bus->slave_addr = 0x2C;
711 dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus;
712
713 /*
714 * LVDS discovery:
715 * 1) check for EDID on DDC
716 * 2) check for VBT data
717 * 3) check to see if LVDS is already on
718 * if none of the above, no panel
719 * 4) make sure lid is open
720 * if closed, act like it's not there for now
721 */
722
723 /*
724 * Attempt to get the fixed panel mode from DDC. Assume that the
725 * preferred mode is the right one.
726 */
727 mutex_lock(&dev->mode_config.mutex);
728 psb_intel_ddc_get_modes(connector, &ddc_bus->base);
729
730 list_for_each_entry(scan, &connector->probed_modes, head) {
731 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
732 mode_dev->panel_fixed_mode =
733 drm_mode_duplicate(dev, scan);
734 DRM_DEBUG_KMS("Using mode from DDC\n");
735 goto out; /* FIXME: check for quirks */
736 }
737 }
738
739 /* Failed to get EDID, what about VBT? do we need this? */
740 if (dev_priv->lfp_lvds_vbt_mode) {
741 mode_dev->panel_fixed_mode =
742 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
743
744 if (mode_dev->panel_fixed_mode) {
745 mode_dev->panel_fixed_mode->type |=
746 DRM_MODE_TYPE_PREFERRED;
747 DRM_DEBUG_KMS("Using mode from VBT\n");
748 goto out;
749 }
750 }
751
752 /*
753 * If we didn't get EDID, try checking if the panel is already turned
754 * on. If so, assume that whatever is currently programmed is the
755 * correct mode.
756 */
757 lvds = REG_READ(LVDS);
758 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
759 crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
760
761 if (crtc && (lvds & LVDS_PORT_EN)) {
762 mode_dev->panel_fixed_mode =
763 psb_intel_crtc_mode_get(dev, crtc);
764 if (mode_dev->panel_fixed_mode) {
765 mode_dev->panel_fixed_mode->type |=
766 DRM_MODE_TYPE_PREFERRED;
767 DRM_DEBUG_KMS("Using pre-programmed mode\n");
768 goto out; /* FIXME: check for quirks */
769 }
770 }
771
772 /* If we still don't have a mode after all that, give up. */
773 if (!mode_dev->panel_fixed_mode) {
774 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n");
775 goto err_unlock;
776 }
777
778 /*
779 * Blacklist machines with BIOSes that list an LVDS panel without
780 * actually having one.
781 */
782 out:
783 mutex_unlock(&dev->mode_config.mutex);
784 return;
785
786 err_unlock:
787 mutex_unlock(&dev->mode_config.mutex);
788 gma_i2c_destroy(lvds_priv->i2c_bus);
789 err_encoder_cleanup:
790 drm_encoder_cleanup(encoder);
791 err_connector_cleanup:
792 drm_connector_cleanup(connector);
793 err_ddc_destroy:
794 gma_i2c_destroy(ddc_bus);
795 err_free_lvds_priv:
796 kfree(lvds_priv);
797 err_free_connector:
798 kfree(gma_connector);
799 err_free_encoder:
800 kfree(gma_encoder);
801 }
802
803