1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright © 2006-2011 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/dmi.h>
12 #include <linux/i2c.h>
13 #include <linux/pm_runtime.h>
14
15 #include <drm/drm_simple_kms_helper.h>
16
17 #include "cdv_device.h"
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 cdv_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
55 /*
56 * Returns the maximum level of the backlight duty cycle field.
57 */
cdv_intel_lvds_get_max_backlight(struct drm_device * dev)58 static u32 cdv_intel_lvds_get_max_backlight(struct drm_device *dev)
59 {
60 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
61 u32 retval;
62
63 if (gma_power_begin(dev, false)) {
64 retval = ((REG_READ(BLC_PWM_CTL) &
65 BACKLIGHT_MODULATION_FREQ_MASK) >>
66 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
67
68 gma_power_end(dev);
69 } else
70 retval = ((dev_priv->regs.saveBLC_PWM_CTL &
71 BACKLIGHT_MODULATION_FREQ_MASK) >>
72 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
73
74 return retval;
75 }
76
77 /*
78 * Sets the backlight level.
79 *
80 * level backlight level, from 0 to cdv_intel_lvds_get_max_backlight().
81 */
cdv_intel_lvds_set_backlight(struct drm_device * dev,int level)82 static void cdv_intel_lvds_set_backlight(struct drm_device *dev, int level)
83 {
84 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
85 u32 blc_pwm_ctl;
86
87 if (gma_power_begin(dev, false)) {
88 blc_pwm_ctl =
89 REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
90 REG_WRITE(BLC_PWM_CTL,
91 (blc_pwm_ctl |
92 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
93 gma_power_end(dev);
94 } else {
95 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &
96 ~BACKLIGHT_DUTY_CYCLE_MASK;
97 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
98 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
99 }
100 }
101
102 /*
103 * Sets the power state for the panel.
104 */
cdv_intel_lvds_set_power(struct drm_device * dev,struct drm_encoder * encoder,bool on)105 static void cdv_intel_lvds_set_power(struct drm_device *dev,
106 struct drm_encoder *encoder, bool on)
107 {
108 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
109 u32 pp_status;
110
111 if (!gma_power_begin(dev, true))
112 return;
113
114 if (on) {
115 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
116 POWER_TARGET_ON);
117 do {
118 pp_status = REG_READ(PP_STATUS);
119 } while ((pp_status & PP_ON) == 0);
120
121 cdv_intel_lvds_set_backlight(dev,
122 dev_priv->mode_dev.backlight_duty_cycle);
123 } else {
124 cdv_intel_lvds_set_backlight(dev, 0);
125
126 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
127 ~POWER_TARGET_ON);
128 do {
129 pp_status = REG_READ(PP_STATUS);
130 } while (pp_status & PP_ON);
131 }
132 gma_power_end(dev);
133 }
134
cdv_intel_lvds_encoder_dpms(struct drm_encoder * encoder,int mode)135 static void cdv_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
136 {
137 struct drm_device *dev = encoder->dev;
138 if (mode == DRM_MODE_DPMS_ON)
139 cdv_intel_lvds_set_power(dev, encoder, true);
140 else
141 cdv_intel_lvds_set_power(dev, encoder, false);
142 /* XXX: We never power down the LVDS pairs. */
143 }
144
cdv_intel_lvds_save(struct drm_connector * connector)145 static void cdv_intel_lvds_save(struct drm_connector *connector)
146 {
147 }
148
cdv_intel_lvds_restore(struct drm_connector * connector)149 static void cdv_intel_lvds_restore(struct drm_connector *connector)
150 {
151 }
152
cdv_intel_lvds_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)153 static enum drm_mode_status cdv_intel_lvds_mode_valid(struct drm_connector *connector,
154 struct drm_display_mode *mode)
155 {
156 struct drm_device *dev = connector->dev;
157 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
158 struct drm_display_mode *fixed_mode =
159 dev_priv->mode_dev.panel_fixed_mode;
160
161 /* just in case */
162 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
163 return MODE_NO_DBLESCAN;
164
165 /* just in case */
166 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
167 return MODE_NO_INTERLACE;
168
169 if (fixed_mode) {
170 if (mode->hdisplay > fixed_mode->hdisplay)
171 return MODE_PANEL;
172 if (mode->vdisplay > fixed_mode->vdisplay)
173 return MODE_PANEL;
174 }
175 return MODE_OK;
176 }
177
cdv_intel_lvds_mode_fixup(struct drm_encoder * encoder,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)178 static bool cdv_intel_lvds_mode_fixup(struct drm_encoder *encoder,
179 const struct drm_display_mode *mode,
180 struct drm_display_mode *adjusted_mode)
181 {
182 struct drm_device *dev = encoder->dev;
183 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
184 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
185 struct drm_encoder *tmp_encoder;
186 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;
187
188 /* Should never happen!! */
189 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,
190 head) {
191 if (tmp_encoder != encoder
192 && tmp_encoder->crtc == encoder->crtc) {
193 pr_err("Can't enable LVDS and another encoder on the same pipe\n");
194 return false;
195 }
196 }
197
198 /*
199 * If we have timings from the BIOS for the panel, put them in
200 * to the adjusted mode. The CRTC will be set up for this mode,
201 * with the panel scaling set up to source from the H/VDisplay
202 * of the original mode.
203 */
204 if (panel_fixed_mode != NULL) {
205 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;
206 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;
207 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;
208 adjusted_mode->htotal = panel_fixed_mode->htotal;
209 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;
210 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;
211 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;
212 adjusted_mode->vtotal = panel_fixed_mode->vtotal;
213 adjusted_mode->clock = panel_fixed_mode->clock;
214 drm_mode_set_crtcinfo(adjusted_mode,
215 CRTC_INTERLACE_HALVE_V);
216 }
217
218 /*
219 * XXX: It would be nice to support lower refresh rates on the
220 * panels to reduce power consumption, and perhaps match the
221 * user's requested refresh rate.
222 */
223
224 return true;
225 }
226
cdv_intel_lvds_prepare(struct drm_encoder * encoder)227 static void cdv_intel_lvds_prepare(struct drm_encoder *encoder)
228 {
229 struct drm_device *dev = encoder->dev;
230 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
231 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
232
233 if (!gma_power_begin(dev, true))
234 return;
235
236 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
237 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &
238 BACKLIGHT_DUTY_CYCLE_MASK);
239
240 cdv_intel_lvds_set_power(dev, encoder, false);
241
242 gma_power_end(dev);
243 }
244
cdv_intel_lvds_commit(struct drm_encoder * encoder)245 static void cdv_intel_lvds_commit(struct drm_encoder *encoder)
246 {
247 struct drm_device *dev = encoder->dev;
248 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
249 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
250
251 if (mode_dev->backlight_duty_cycle == 0)
252 mode_dev->backlight_duty_cycle =
253 cdv_intel_lvds_get_max_backlight(dev);
254
255 cdv_intel_lvds_set_power(dev, encoder, true);
256 }
257
cdv_intel_lvds_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)258 static void cdv_intel_lvds_mode_set(struct drm_encoder *encoder,
259 struct drm_display_mode *mode,
260 struct drm_display_mode *adjusted_mode)
261 {
262 struct drm_device *dev = encoder->dev;
263 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
264 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc);
265 u32 pfit_control;
266
267 /*
268 * The LVDS pin pair will already have been turned on in the
269 * cdv_intel_crtc_mode_set since it has a large impact on the DPLL
270 * settings.
271 */
272
273 /*
274 * Enable automatic panel scaling so that non-native modes fill the
275 * screen. Should be enabled before the pipe is enabled, according to
276 * register description and PRM.
277 */
278 if (mode->hdisplay != adjusted_mode->hdisplay ||
279 mode->vdisplay != adjusted_mode->vdisplay)
280 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
281 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
282 HORIZ_INTERP_BILINEAR);
283 else
284 pfit_control = 0;
285
286 pfit_control |= gma_crtc->pipe << PFIT_PIPE_SHIFT;
287
288 if (dev_priv->lvds_dither)
289 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
290
291 REG_WRITE(PFIT_CONTROL, pfit_control);
292 }
293
294 /*
295 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
296 */
cdv_intel_lvds_get_modes(struct drm_connector * connector)297 static int cdv_intel_lvds_get_modes(struct drm_connector *connector)
298 {
299 struct drm_device *dev = connector->dev;
300 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
301 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
302 int ret;
303
304 ret = psb_intel_ddc_get_modes(connector, connector->ddc);
305
306 if (ret)
307 return ret;
308
309 if (mode_dev->panel_fixed_mode != NULL) {
310 struct drm_display_mode *mode =
311 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
312 drm_mode_probed_add(connector, mode);
313 return 1;
314 }
315
316 return 0;
317 }
318
cdv_intel_lvds_destroy(struct drm_connector * connector)319 static void cdv_intel_lvds_destroy(struct drm_connector *connector)
320 {
321 struct gma_connector *gma_connector = to_gma_connector(connector);
322 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
323
324 gma_i2c_destroy(to_gma_i2c_chan(connector->ddc));
325 gma_i2c_destroy(gma_encoder->i2c_bus);
326 drm_connector_cleanup(connector);
327 kfree(gma_connector);
328 }
329
cdv_intel_lvds_set_property(struct drm_connector * connector,struct drm_property * property,uint64_t value)330 static int cdv_intel_lvds_set_property(struct drm_connector *connector,
331 struct drm_property *property,
332 uint64_t value)
333 {
334 struct drm_encoder *encoder = connector->encoder;
335
336 if (!strcmp(property->name, "scaling mode") && encoder) {
337 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
338 uint64_t curValue;
339
340 if (!crtc)
341 return -1;
342
343 switch (value) {
344 case DRM_MODE_SCALE_FULLSCREEN:
345 break;
346 case DRM_MODE_SCALE_NO_SCALE:
347 break;
348 case DRM_MODE_SCALE_ASPECT:
349 break;
350 default:
351 return -1;
352 }
353
354 if (drm_object_property_get_value(&connector->base,
355 property,
356 &curValue))
357 return -1;
358
359 if (curValue == value)
360 return 0;
361
362 if (drm_object_property_set_value(&connector->base,
363 property,
364 value))
365 return -1;
366
367 if (crtc->saved_mode.hdisplay != 0 &&
368 crtc->saved_mode.vdisplay != 0) {
369 if (!drm_crtc_helper_set_mode(encoder->crtc,
370 &crtc->saved_mode,
371 encoder->crtc->x,
372 encoder->crtc->y,
373 encoder->crtc->primary->fb))
374 return -1;
375 }
376 } else if (!strcmp(property->name, "backlight") && encoder) {
377 if (drm_object_property_set_value(&connector->base,
378 property,
379 value))
380 return -1;
381 else
382 gma_backlight_set(encoder->dev, value);
383 } else if (!strcmp(property->name, "DPMS") && encoder) {
384 const struct drm_encoder_helper_funcs *helpers =
385 encoder->helper_private;
386 helpers->dpms(encoder, value);
387 }
388 return 0;
389 }
390
391 static const struct drm_encoder_helper_funcs
392 cdv_intel_lvds_helper_funcs = {
393 .dpms = cdv_intel_lvds_encoder_dpms,
394 .mode_fixup = cdv_intel_lvds_mode_fixup,
395 .prepare = cdv_intel_lvds_prepare,
396 .mode_set = cdv_intel_lvds_mode_set,
397 .commit = cdv_intel_lvds_commit,
398 };
399
400 static const struct drm_connector_helper_funcs
401 cdv_intel_lvds_connector_helper_funcs = {
402 .get_modes = cdv_intel_lvds_get_modes,
403 .mode_valid = cdv_intel_lvds_mode_valid,
404 .best_encoder = gma_best_encoder,
405 };
406
407 static const struct drm_connector_funcs cdv_intel_lvds_connector_funcs = {
408 .dpms = drm_helper_connector_dpms,
409 .fill_modes = drm_helper_probe_single_connector_modes,
410 .set_property = cdv_intel_lvds_set_property,
411 .destroy = cdv_intel_lvds_destroy,
412 };
413
414 /*
415 * Enumerate the child dev array parsed from VBT to check whether
416 * the LVDS is present.
417 * If it is present, return 1.
418 * If it is not present, return false.
419 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
420 */
lvds_is_present_in_vbt(struct drm_device * dev,u8 * i2c_pin)421 static bool lvds_is_present_in_vbt(struct drm_device *dev,
422 u8 *i2c_pin)
423 {
424 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
425 int i;
426
427 if (!dev_priv->child_dev_num)
428 return true;
429
430 for (i = 0; i < dev_priv->child_dev_num; i++) {
431 struct child_device_config *child = dev_priv->child_dev + i;
432
433 /* If the device type is not LFP, continue.
434 * We have to check both the new identifiers as well as the
435 * old for compatibility with some BIOSes.
436 */
437 if (child->device_type != DEVICE_TYPE_INT_LFP &&
438 child->device_type != DEVICE_TYPE_LFP)
439 continue;
440
441 if (child->i2c_pin)
442 *i2c_pin = child->i2c_pin;
443
444 /* However, we cannot trust the BIOS writers to populate
445 * the VBT correctly. Since LVDS requires additional
446 * information from AIM blocks, a non-zero addin offset is
447 * a good indicator that the LVDS is actually present.
448 */
449 if (child->addin_offset)
450 return true;
451
452 /* But even then some BIOS writers perform some black magic
453 * and instantiate the device without reference to any
454 * additional data. Trust that if the VBT was written into
455 * the OpRegion then they have validated the LVDS's existence.
456 */
457 if (dev_priv->opregion.vbt)
458 return true;
459 }
460
461 return false;
462 }
463
464 /**
465 * cdv_intel_lvds_init - setup LVDS connectors on this device
466 * @dev: drm device
467 * @mode_dev: PSB mode device
468 *
469 * Create the connector, register the LVDS DDC bus, and try to figure out what
470 * modes we can display on the LVDS panel (if present).
471 */
cdv_intel_lvds_init(struct drm_device * dev,struct psb_intel_mode_device * mode_dev)472 void cdv_intel_lvds_init(struct drm_device *dev,
473 struct psb_intel_mode_device *mode_dev)
474 {
475 struct gma_encoder *gma_encoder;
476 struct gma_connector *gma_connector;
477 struct cdv_intel_lvds_priv *lvds_priv;
478 struct drm_connector *connector;
479 struct drm_encoder *encoder;
480 struct drm_display_mode *scan;
481 struct drm_crtc *crtc;
482 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
483 struct gma_i2c_chan *ddc_bus;
484 u32 lvds;
485 int pipe;
486 int ret;
487 u8 pin;
488
489 if (!dev_priv->lvds_enabled_in_vbt)
490 return;
491
492 pin = GMBUS_PORT_PANEL;
493 if (!lvds_is_present_in_vbt(dev, &pin)) {
494 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
495 return;
496 }
497
498 gma_encoder = kzalloc(sizeof(struct gma_encoder),
499 GFP_KERNEL);
500 if (!gma_encoder)
501 return;
502
503 gma_connector = kzalloc(sizeof(struct gma_connector),
504 GFP_KERNEL);
505 if (!gma_connector)
506 goto err_free_encoder;
507
508 lvds_priv = kzalloc(sizeof(struct cdv_intel_lvds_priv), GFP_KERNEL);
509 if (!lvds_priv)
510 goto err_free_connector;
511
512 gma_encoder->dev_priv = lvds_priv;
513
514 connector = &gma_connector->base;
515 gma_connector->save = cdv_intel_lvds_save;
516 gma_connector->restore = cdv_intel_lvds_restore;
517 encoder = &gma_encoder->base;
518
519 /* Set up the DDC bus. */
520 ddc_bus = gma_i2c_create(dev, GPIOC, "LVDSDDC_C");
521 if (!ddc_bus) {
522 dev_printk(KERN_ERR, dev->dev,
523 "DDC bus registration " "failed.\n");
524 goto err_free_lvds_priv;
525 }
526
527 ret = drm_connector_init_with_ddc(dev, connector,
528 &cdv_intel_lvds_connector_funcs,
529 DRM_MODE_CONNECTOR_LVDS,
530 &ddc_bus->base);
531 if (ret)
532 goto err_destroy_ddc;
533
534 ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS);
535 if (ret)
536 goto err_connector_cleanup;
537
538 gma_connector_attach_encoder(gma_connector, gma_encoder);
539 gma_encoder->type = INTEL_OUTPUT_LVDS;
540
541 drm_encoder_helper_add(encoder, &cdv_intel_lvds_helper_funcs);
542 drm_connector_helper_add(connector,
543 &cdv_intel_lvds_connector_helper_funcs);
544 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
545 connector->interlace_allowed = false;
546 connector->doublescan_allowed = false;
547
548 /*Attach connector properties*/
549 drm_object_attach_property(&connector->base,
550 dev->mode_config.scaling_mode_property,
551 DRM_MODE_SCALE_FULLSCREEN);
552 drm_object_attach_property(&connector->base,
553 dev_priv->backlight_property,
554 BRIGHTNESS_MAX_LEVEL);
555
556 /**
557 * Set up I2C bus
558 * FIXME: distroy i2c_bus when exit
559 */
560 gma_encoder->i2c_bus = gma_i2c_create(dev, GPIOB, "LVDSBLC_B");
561 if (!gma_encoder->i2c_bus) {
562 dev_printk(KERN_ERR,
563 dev->dev, "I2C bus registration failed.\n");
564 goto err_encoder_cleanup;
565 }
566 gma_encoder->i2c_bus->slave_addr = 0x2C;
567 dev_priv->lvds_i2c_bus = gma_encoder->i2c_bus;
568
569 /*
570 * LVDS discovery:
571 * 1) check for EDID on DDC
572 * 2) check for VBT data
573 * 3) check to see if LVDS is already on
574 * if none of the above, no panel
575 * 4) make sure lid is open
576 * if closed, act like it's not there for now
577 */
578
579 /*
580 * Attempt to get the fixed panel mode from DDC. Assume that the
581 * preferred mode is the right one.
582 */
583 mutex_lock(&dev->mode_config.mutex);
584 psb_intel_ddc_get_modes(connector, &ddc_bus->base);
585
586 list_for_each_entry(scan, &connector->probed_modes, head) {
587 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
588 mode_dev->panel_fixed_mode =
589 drm_mode_duplicate(dev, scan);
590 goto out; /* FIXME: check for quirks */
591 }
592 }
593
594 /* Failed to get EDID, what about VBT? do we need this?*/
595 if (dev_priv->lfp_lvds_vbt_mode) {
596 mode_dev->panel_fixed_mode =
597 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
598 if (mode_dev->panel_fixed_mode) {
599 mode_dev->panel_fixed_mode->type |=
600 DRM_MODE_TYPE_PREFERRED;
601 goto out; /* FIXME: check for quirks */
602 }
603 }
604 /*
605 * If we didn't get EDID, try checking if the panel is already turned
606 * on. If so, assume that whatever is currently programmed is the
607 * correct mode.
608 */
609 lvds = REG_READ(LVDS);
610 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
611 crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
612
613 if (crtc && (lvds & LVDS_PORT_EN)) {
614 mode_dev->panel_fixed_mode =
615 cdv_intel_crtc_mode_get(dev, crtc);
616 if (mode_dev->panel_fixed_mode) {
617 mode_dev->panel_fixed_mode->type |=
618 DRM_MODE_TYPE_PREFERRED;
619 goto out; /* FIXME: check for quirks */
620 }
621 }
622
623 /* If we still don't have a mode after all that, give up. */
624 if (!mode_dev->panel_fixed_mode) {
625 DRM_DEBUG
626 ("Found no modes on the lvds, ignoring the LVDS\n");
627 goto err_unlock;
628 }
629
630 /* setup PWM */
631 {
632 u32 pwm;
633
634 pwm = REG_READ(BLC_PWM_CTL2);
635 if (pipe == 1)
636 pwm |= PWM_PIPE_B;
637 else
638 pwm &= ~PWM_PIPE_B;
639 pwm |= PWM_ENABLE;
640 REG_WRITE(BLC_PWM_CTL2, pwm);
641 }
642
643 out:
644 mutex_unlock(&dev->mode_config.mutex);
645 return;
646
647 err_unlock:
648 mutex_unlock(&dev->mode_config.mutex);
649 gma_i2c_destroy(gma_encoder->i2c_bus);
650 err_encoder_cleanup:
651 drm_encoder_cleanup(encoder);
652 err_connector_cleanup:
653 drm_connector_cleanup(connector);
654 err_destroy_ddc:
655 gma_i2c_destroy(ddc_bus);
656 err_free_lvds_priv:
657 kfree(lvds_priv);
658 err_free_connector:
659 kfree(gma_connector);
660 err_free_encoder:
661 kfree(gma_encoder);
662 }
663
