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_crtc_helper.h>
16 #include <drm/drm_modeset_helper_vtables.h>
17 #include <drm/drm_print.h>
18 #include <drm/drm_simple_kms_helper.h>
19
20 #include "cdv_device.h"
21 #include "intel_bios.h"
22 #include "power.h"
23 #include "psb_drv.h"
24 #include "psb_intel_drv.h"
25 #include "psb_intel_reg.h"
26
27 /*
28 * LVDS I2C backlight control macros
29 */
30 #define BRIGHTNESS_MAX_LEVEL 100
31 #define BRIGHTNESS_MASK 0xFF
32 #define BLC_I2C_TYPE 0x01
33 #define BLC_PWM_TYPT 0x02
34
35 #define BLC_POLARITY_NORMAL 0
36 #define BLC_POLARITY_INVERSE 1
37
38 #define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE)
39 #define PSB_BLC_MIN_PWM_REG_FREQ (0x2)
40 #define PSB_BLC_PWM_PRECISION_FACTOR (10)
41 #define PSB_BACKLIGHT_PWM_CTL_SHIFT (16)
42 #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
43
44 struct cdv_intel_lvds_priv {
45 /**
46 * Saved LVDO output states
47 */
48 uint32_t savePP_ON;
49 uint32_t savePP_OFF;
50 uint32_t saveLVDS;
51 uint32_t savePP_CONTROL;
52 uint32_t savePP_CYCLE;
53 uint32_t savePFIT_CONTROL;
54 uint32_t savePFIT_PGM_RATIOS;
55 uint32_t saveBLC_PWM_CTL;
56 };
57
58 /*
59 * Returns the maximum level of the backlight duty cycle field.
60 */
cdv_intel_lvds_get_max_backlight(struct drm_device * dev)61 static u32 cdv_intel_lvds_get_max_backlight(struct drm_device *dev)
62 {
63 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
64 u32 retval;
65
66 if (gma_power_begin(dev, false)) {
67 retval = ((REG_READ(BLC_PWM_CTL) &
68 BACKLIGHT_MODULATION_FREQ_MASK) >>
69 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
70
71 gma_power_end(dev);
72 } else
73 retval = ((dev_priv->regs.saveBLC_PWM_CTL &
74 BACKLIGHT_MODULATION_FREQ_MASK) >>
75 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
76
77 return retval;
78 }
79
80 /*
81 * Sets the backlight level.
82 *
83 * level backlight level, from 0 to cdv_intel_lvds_get_max_backlight().
84 */
cdv_intel_lvds_set_backlight(struct drm_device * dev,int level)85 static void cdv_intel_lvds_set_backlight(struct drm_device *dev, int level)
86 {
87 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
88 u32 blc_pwm_ctl;
89
90 if (gma_power_begin(dev, false)) {
91 blc_pwm_ctl =
92 REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
93 REG_WRITE(BLC_PWM_CTL,
94 (blc_pwm_ctl |
95 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
96 gma_power_end(dev);
97 } else {
98 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &
99 ~BACKLIGHT_DUTY_CYCLE_MASK;
100 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
101 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
102 }
103 }
104
105 /*
106 * Sets the power state for the panel.
107 */
cdv_intel_lvds_set_power(struct drm_device * dev,struct drm_encoder * encoder,bool on)108 static void cdv_intel_lvds_set_power(struct drm_device *dev,
109 struct drm_encoder *encoder, bool on)
110 {
111 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
112 u32 pp_status;
113
114 if (!gma_power_begin(dev, true))
115 return;
116
117 if (on) {
118 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
119 POWER_TARGET_ON);
120 do {
121 pp_status = REG_READ(PP_STATUS);
122 } while ((pp_status & PP_ON) == 0);
123
124 cdv_intel_lvds_set_backlight(dev,
125 dev_priv->mode_dev.backlight_duty_cycle);
126 } else {
127 cdv_intel_lvds_set_backlight(dev, 0);
128
129 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
130 ~POWER_TARGET_ON);
131 do {
132 pp_status = REG_READ(PP_STATUS);
133 } while (pp_status & PP_ON);
134 }
135 gma_power_end(dev);
136 }
137
cdv_intel_lvds_encoder_dpms(struct drm_encoder * encoder,int mode)138 static void cdv_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
139 {
140 struct drm_device *dev = encoder->dev;
141 if (mode == DRM_MODE_DPMS_ON)
142 cdv_intel_lvds_set_power(dev, encoder, true);
143 else
144 cdv_intel_lvds_set_power(dev, encoder, false);
145 /* XXX: We never power down the LVDS pairs. */
146 }
147
cdv_intel_lvds_save(struct drm_connector * connector)148 static void cdv_intel_lvds_save(struct drm_connector *connector)
149 {
150 }
151
cdv_intel_lvds_restore(struct drm_connector * connector)152 static void cdv_intel_lvds_restore(struct drm_connector *connector)
153 {
154 }
155
cdv_intel_lvds_mode_valid(struct drm_connector * connector,const struct drm_display_mode * mode)156 static enum drm_mode_status cdv_intel_lvds_mode_valid(struct drm_connector *connector,
157 const struct drm_display_mode *mode)
158 {
159 struct drm_device *dev = connector->dev;
160 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
161 struct drm_display_mode *fixed_mode =
162 dev_priv->mode_dev.panel_fixed_mode;
163
164 /* just in case */
165 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
166 return MODE_NO_DBLESCAN;
167
168 /* just in case */
169 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
170 return MODE_NO_INTERLACE;
171
172 if (fixed_mode) {
173 if (mode->hdisplay > fixed_mode->hdisplay)
174 return MODE_PANEL;
175 if (mode->vdisplay > fixed_mode->vdisplay)
176 return MODE_PANEL;
177 }
178 return MODE_OK;
179 }
180
cdv_intel_lvds_mode_fixup(struct drm_encoder * encoder,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)181 static bool cdv_intel_lvds_mode_fixup(struct drm_encoder *encoder,
182 const struct drm_display_mode *mode,
183 struct drm_display_mode *adjusted_mode)
184 {
185 struct drm_device *dev = encoder->dev;
186 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
187 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
188 struct drm_encoder *tmp_encoder;
189 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;
190
191 /* Should never happen!! */
192 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,
193 head) {
194 if (tmp_encoder != encoder
195 && tmp_encoder->crtc == encoder->crtc) {
196 pr_err("Can't enable LVDS and another encoder on the same pipe\n");
197 return false;
198 }
199 }
200
201 /*
202 * If we have timings from the BIOS for the panel, put them in
203 * to the adjusted mode. The CRTC will be set up for this mode,
204 * with the panel scaling set up to source from the H/VDisplay
205 * of the original mode.
206 */
207 if (panel_fixed_mode != NULL) {
208 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;
209 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;
210 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;
211 adjusted_mode->htotal = panel_fixed_mode->htotal;
212 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;
213 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;
214 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;
215 adjusted_mode->vtotal = panel_fixed_mode->vtotal;
216 adjusted_mode->clock = panel_fixed_mode->clock;
217 drm_mode_set_crtcinfo(adjusted_mode,
218 CRTC_INTERLACE_HALVE_V);
219 }
220
221 /*
222 * XXX: It would be nice to support lower refresh rates on the
223 * panels to reduce power consumption, and perhaps match the
224 * user's requested refresh rate.
225 */
226
227 return true;
228 }
229
cdv_intel_lvds_prepare(struct drm_encoder * encoder)230 static void cdv_intel_lvds_prepare(struct drm_encoder *encoder)
231 {
232 struct drm_device *dev = encoder->dev;
233 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
234 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
235
236 if (!gma_power_begin(dev, true))
237 return;
238
239 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
240 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &
241 BACKLIGHT_DUTY_CYCLE_MASK);
242
243 cdv_intel_lvds_set_power(dev, encoder, false);
244
245 gma_power_end(dev);
246 }
247
cdv_intel_lvds_commit(struct drm_encoder * encoder)248 static void cdv_intel_lvds_commit(struct drm_encoder *encoder)
249 {
250 struct drm_device *dev = encoder->dev;
251 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
252 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
253
254 if (mode_dev->backlight_duty_cycle == 0)
255 mode_dev->backlight_duty_cycle =
256 cdv_intel_lvds_get_max_backlight(dev);
257
258 cdv_intel_lvds_set_power(dev, encoder, true);
259 }
260
cdv_intel_lvds_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)261 static void cdv_intel_lvds_mode_set(struct drm_encoder *encoder,
262 struct drm_display_mode *mode,
263 struct drm_display_mode *adjusted_mode)
264 {
265 struct drm_device *dev = encoder->dev;
266 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
267 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc);
268 u32 pfit_control;
269
270 /*
271 * The LVDS pin pair will already have been turned on in the
272 * cdv_intel_crtc_mode_set since it has a large impact on the DPLL
273 * settings.
274 */
275
276 /*
277 * Enable automatic panel scaling so that non-native modes fill the
278 * screen. Should be enabled before the pipe is enabled, according to
279 * register description and PRM.
280 */
281 if (mode->hdisplay != adjusted_mode->hdisplay ||
282 mode->vdisplay != adjusted_mode->vdisplay)
283 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
284 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
285 HORIZ_INTERP_BILINEAR);
286 else
287 pfit_control = 0;
288
289 pfit_control |= gma_crtc->pipe << PFIT_PIPE_SHIFT;
290
291 if (dev_priv->lvds_dither)
292 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
293
294 REG_WRITE(PFIT_CONTROL, pfit_control);
295 }
296
297 /*
298 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
299 */
cdv_intel_lvds_get_modes(struct drm_connector * connector)300 static int cdv_intel_lvds_get_modes(struct drm_connector *connector)
301 {
302 struct drm_device *dev = connector->dev;
303 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
304 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
305 int ret;
306
307 ret = psb_intel_ddc_get_modes(connector, connector->ddc);
308
309 if (ret)
310 return ret;
311
312 if (mode_dev->panel_fixed_mode != NULL) {
313 struct drm_display_mode *mode =
314 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
315 if (!mode)
316 return 0;
317
318 drm_mode_probed_add(connector, mode);
319 return 1;
320 }
321
322 return 0;
323 }
324
cdv_intel_lvds_destroy(struct drm_connector * connector)325 static void cdv_intel_lvds_destroy(struct drm_connector *connector)
326 {
327 struct gma_connector *gma_connector = to_gma_connector(connector);
328 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
329
330 gma_i2c_destroy(to_gma_i2c_chan(connector->ddc));
331 gma_i2c_destroy(gma_encoder->i2c_bus);
332 drm_connector_cleanup(connector);
333 kfree(gma_connector);
334 }
335
cdv_intel_lvds_set_property(struct drm_connector * connector,struct drm_property * property,uint64_t value)336 static int cdv_intel_lvds_set_property(struct drm_connector *connector,
337 struct drm_property *property,
338 uint64_t value)
339 {
340 struct drm_encoder *encoder = connector->encoder;
341
342 if (!strcmp(property->name, "scaling mode") && encoder) {
343 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
344 uint64_t curValue;
345
346 if (!crtc)
347 return -1;
348
349 switch (value) {
350 case DRM_MODE_SCALE_FULLSCREEN:
351 break;
352 case DRM_MODE_SCALE_NO_SCALE:
353 break;
354 case DRM_MODE_SCALE_ASPECT:
355 break;
356 default:
357 return -1;
358 }
359
360 if (drm_object_property_get_value(&connector->base,
361 property,
362 &curValue))
363 return -1;
364
365 if (curValue == value)
366 return 0;
367
368 if (drm_object_property_set_value(&connector->base,
369 property,
370 value))
371 return -1;
372
373 if (crtc->saved_mode.hdisplay != 0 &&
374 crtc->saved_mode.vdisplay != 0) {
375 if (!drm_crtc_helper_set_mode(encoder->crtc,
376 &crtc->saved_mode,
377 encoder->crtc->x,
378 encoder->crtc->y,
379 encoder->crtc->primary->fb))
380 return -1;
381 }
382 } else if (!strcmp(property->name, "backlight") && encoder) {
383 if (drm_object_property_set_value(&connector->base,
384 property,
385 value))
386 return -1;
387 else
388 gma_backlight_set(encoder->dev, value);
389 } else if (!strcmp(property->name, "DPMS") && encoder) {
390 const struct drm_encoder_helper_funcs *helpers =
391 encoder->helper_private;
392 helpers->dpms(encoder, value);
393 }
394 return 0;
395 }
396
397 static const struct drm_encoder_helper_funcs
398 cdv_intel_lvds_helper_funcs = {
399 .dpms = cdv_intel_lvds_encoder_dpms,
400 .mode_fixup = cdv_intel_lvds_mode_fixup,
401 .prepare = cdv_intel_lvds_prepare,
402 .mode_set = cdv_intel_lvds_mode_set,
403 .commit = cdv_intel_lvds_commit,
404 };
405
406 static const struct drm_connector_helper_funcs
407 cdv_intel_lvds_connector_helper_funcs = {
408 .get_modes = cdv_intel_lvds_get_modes,
409 .mode_valid = cdv_intel_lvds_mode_valid,
410 .best_encoder = gma_best_encoder,
411 };
412
413 static const struct drm_connector_funcs cdv_intel_lvds_connector_funcs = {
414 .dpms = drm_helper_connector_dpms,
415 .fill_modes = drm_helper_probe_single_connector_modes,
416 .set_property = cdv_intel_lvds_set_property,
417 .destroy = cdv_intel_lvds_destroy,
418 };
419
420 /*
421 * Enumerate the child dev array parsed from VBT to check whether
422 * the LVDS is present.
423 * If it is present, return 1.
424 * If it is not present, return false.
425 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
426 */
lvds_is_present_in_vbt(struct drm_device * dev,u8 * i2c_pin)427 static bool lvds_is_present_in_vbt(struct drm_device *dev,
428 u8 *i2c_pin)
429 {
430 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
431 int i;
432
433 if (!dev_priv->child_dev_num)
434 return true;
435
436 for (i = 0; i < dev_priv->child_dev_num; i++) {
437 struct child_device_config *child = dev_priv->child_dev + i;
438
439 /* If the device type is not LFP, continue.
440 * We have to check both the new identifiers as well as the
441 * old for compatibility with some BIOSes.
442 */
443 if (child->device_type != DEVICE_TYPE_INT_LFP &&
444 child->device_type != DEVICE_TYPE_LFP)
445 continue;
446
447 if (child->i2c_pin)
448 *i2c_pin = child->i2c_pin;
449
450 /* However, we cannot trust the BIOS writers to populate
451 * the VBT correctly. Since LVDS requires additional
452 * information from AIM blocks, a non-zero addin offset is
453 * a good indicator that the LVDS is actually present.
454 */
455 if (child->addin_offset)
456 return true;
457
458 /* But even then some BIOS writers perform some black magic
459 * and instantiate the device without reference to any
460 * additional data. Trust that if the VBT was written into
461 * the OpRegion then they have validated the LVDS's existence.
462 */
463 if (dev_priv->opregion.vbt)
464 return true;
465 }
466
467 return false;
468 }
469
470 /**
471 * cdv_intel_lvds_init - setup LVDS connectors on this device
472 * @dev: drm device
473 * @mode_dev: PSB mode device
474 *
475 * Create the connector, register the LVDS DDC bus, and try to figure out what
476 * modes we can display on the LVDS panel (if present).
477 */
cdv_intel_lvds_init(struct drm_device * dev,struct psb_intel_mode_device * mode_dev)478 void cdv_intel_lvds_init(struct drm_device *dev,
479 struct psb_intel_mode_device *mode_dev)
480 {
481 struct gma_encoder *gma_encoder;
482 struct gma_connector *gma_connector;
483 struct cdv_intel_lvds_priv *lvds_priv;
484 struct drm_connector *connector;
485 struct drm_encoder *encoder;
486 struct drm_display_mode *scan;
487 struct drm_crtc *crtc;
488 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
489 struct gma_i2c_chan *ddc_bus;
490 u32 lvds;
491 int pipe;
492 int ret;
493 u8 pin;
494
495 if (!dev_priv->lvds_enabled_in_vbt)
496 return;
497
498 pin = GMBUS_PORT_PANEL;
499 if (!lvds_is_present_in_vbt(dev, &pin)) {
500 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
501 return;
502 }
503
504 gma_encoder = kzalloc_obj(struct gma_encoder);
505 if (!gma_encoder)
506 return;
507
508 gma_connector = kzalloc_obj(struct gma_connector);
509 if (!gma_connector)
510 goto err_free_encoder;
511
512 lvds_priv = kzalloc_obj(struct cdv_intel_lvds_priv);
513 if (!lvds_priv)
514 goto err_free_connector;
515
516 gma_encoder->dev_priv = lvds_priv;
517
518 connector = &gma_connector->base;
519 gma_connector->save = cdv_intel_lvds_save;
520 gma_connector->restore = cdv_intel_lvds_restore;
521 encoder = &gma_encoder->base;
522
523 /* Set up the DDC bus. */
524 ddc_bus = gma_i2c_create(dev, GPIOC, "LVDSDDC_C");
525 if (!ddc_bus) {
526 dev_printk(KERN_ERR, dev->dev,
527 "DDC bus registration " "failed.\n");
528 goto err_free_lvds_priv;
529 }
530
531 ret = drm_connector_init_with_ddc(dev, connector,
532 &cdv_intel_lvds_connector_funcs,
533 DRM_MODE_CONNECTOR_LVDS,
534 &ddc_bus->base);
535 if (ret)
536 goto err_destroy_ddc;
537
538 ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS);
539 if (ret)
540 goto err_connector_cleanup;
541
542 gma_connector_attach_encoder(gma_connector, gma_encoder);
543 gma_encoder->type = INTEL_OUTPUT_LVDS;
544
545 drm_encoder_helper_add(encoder, &cdv_intel_lvds_helper_funcs);
546 drm_connector_helper_add(connector,
547 &cdv_intel_lvds_connector_helper_funcs);
548 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
549 connector->interlace_allowed = false;
550 connector->doublescan_allowed = false;
551
552 /*Attach connector properties*/
553 drm_object_attach_property(&connector->base,
554 dev->mode_config.scaling_mode_property,
555 DRM_MODE_SCALE_FULLSCREEN);
556 drm_object_attach_property(&connector->base,
557 dev_priv->backlight_property,
558 BRIGHTNESS_MAX_LEVEL);
559
560 /**
561 * Set up I2C bus
562 * FIXME: distroy i2c_bus when exit
563 */
564 gma_encoder->i2c_bus = gma_i2c_create(dev, GPIOB, "LVDSBLC_B");
565 if (!gma_encoder->i2c_bus) {
566 dev_printk(KERN_ERR,
567 dev->dev, "I2C bus registration failed.\n");
568 goto err_encoder_cleanup;
569 }
570 gma_encoder->i2c_bus->target_addr = 0x2C;
571 dev_priv->lvds_i2c_bus = gma_encoder->i2c_bus;
572
573 /*
574 * LVDS discovery:
575 * 1) check for EDID on DDC
576 * 2) check for VBT data
577 * 3) check to see if LVDS is already on
578 * if none of the above, no panel
579 * 4) make sure lid is open
580 * if closed, act like it's not there for now
581 */
582
583 /*
584 * Attempt to get the fixed panel mode from DDC. Assume that the
585 * preferred mode is the right one.
586 */
587 mutex_lock(&dev->mode_config.mutex);
588 psb_intel_ddc_get_modes(connector, &ddc_bus->base);
589
590 list_for_each_entry(scan, &connector->probed_modes, head) {
591 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
592 mode_dev->panel_fixed_mode =
593 drm_mode_duplicate(dev, scan);
594 goto out; /* FIXME: check for quirks */
595 }
596 }
597
598 /* Failed to get EDID, what about VBT? do we need this?*/
599 if (dev_priv->lfp_lvds_vbt_mode) {
600 mode_dev->panel_fixed_mode =
601 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
602 if (mode_dev->panel_fixed_mode) {
603 mode_dev->panel_fixed_mode->type |=
604 DRM_MODE_TYPE_PREFERRED;
605 goto out; /* FIXME: check for quirks */
606 }
607 }
608 /*
609 * If we didn't get EDID, try checking if the panel is already turned
610 * on. If so, assume that whatever is currently programmed is the
611 * correct mode.
612 */
613 lvds = REG_READ(LVDS);
614 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
615 crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
616
617 if (crtc && (lvds & LVDS_PORT_EN)) {
618 mode_dev->panel_fixed_mode =
619 cdv_intel_crtc_mode_get(dev, crtc);
620 if (mode_dev->panel_fixed_mode) {
621 mode_dev->panel_fixed_mode->type |=
622 DRM_MODE_TYPE_PREFERRED;
623 goto out; /* FIXME: check for quirks */
624 }
625 }
626
627 /* If we still don't have a mode after all that, give up. */
628 if (!mode_dev->panel_fixed_mode) {
629 DRM_DEBUG
630 ("Found no modes on the lvds, ignoring the LVDS\n");
631 goto err_unlock;
632 }
633
634 /* setup PWM */
635 {
636 u32 pwm;
637
638 pwm = REG_READ(BLC_PWM_CTL2);
639 if (pipe == 1)
640 pwm |= PWM_PIPE_B;
641 else
642 pwm &= ~PWM_PIPE_B;
643 pwm |= PWM_ENABLE;
644 REG_WRITE(BLC_PWM_CTL2, pwm);
645 }
646
647 out:
648 mutex_unlock(&dev->mode_config.mutex);
649 return;
650
651 err_unlock:
652 mutex_unlock(&dev->mode_config.mutex);
653 gma_i2c_destroy(gma_encoder->i2c_bus);
654 err_encoder_cleanup:
655 drm_encoder_cleanup(encoder);
656 err_connector_cleanup:
657 drm_connector_cleanup(connector);
658 err_destroy_ddc:
659 gma_i2c_destroy(ddc_bus);
660 err_free_lvds_priv:
661 kfree(lvds_priv);
662 err_free_connector:
663 kfree(gma_connector);
664 err_free_encoder:
665 kfree(gma_encoder);
666 }
667