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23#include <linux/i2c.h>
24#include <linux/dmi.h>
25#include <drm/drmP.h>
26
27#include "intel_bios.h"
28#include "psb_drv.h"
29#include "psb_intel_drv.h"
30#include "psb_intel_reg.h"
31#include "power.h"
32#include <linux/pm_runtime.h>
33#include "cdv_device.h"
34
35
36
37
38#define BRIGHTNESS_MAX_LEVEL 100
39#define BRIGHTNESS_MASK 0xFF
40#define BLC_I2C_TYPE 0x01
41#define BLC_PWM_TYPT 0x02
42
43#define BLC_POLARITY_NORMAL 0
44#define BLC_POLARITY_INVERSE 1
45
46#define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE)
47#define PSB_BLC_MIN_PWM_REG_FREQ (0x2)
48#define PSB_BLC_PWM_PRECISION_FACTOR (10)
49#define PSB_BACKLIGHT_PWM_CTL_SHIFT (16)
50#define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
51
52struct cdv_intel_lvds_priv {
53
54
55
56 uint32_t savePP_ON;
57 uint32_t savePP_OFF;
58 uint32_t saveLVDS;
59 uint32_t savePP_CONTROL;
60 uint32_t savePP_CYCLE;
61 uint32_t savePFIT_CONTROL;
62 uint32_t savePFIT_PGM_RATIOS;
63 uint32_t saveBLC_PWM_CTL;
64};
65
66
67
68
69static u32 cdv_intel_lvds_get_max_backlight(struct drm_device *dev)
70{
71 struct drm_psb_private *dev_priv = dev->dev_private;
72 u32 retval;
73
74 if (gma_power_begin(dev, false)) {
75 retval = ((REG_READ(BLC_PWM_CTL) &
76 BACKLIGHT_MODULATION_FREQ_MASK) >>
77 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
78
79 gma_power_end(dev);
80 } else
81 retval = ((dev_priv->regs.saveBLC_PWM_CTL &
82 BACKLIGHT_MODULATION_FREQ_MASK) >>
83 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
84
85 return retval;
86}
87
88#if 0
89
90
91
92static int cdv_lvds_i2c_set_brightness(struct drm_device *dev,
93 unsigned int level)
94{
95 struct drm_psb_private *dev_priv = dev->dev_private;
96 struct psb_intel_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus;
97 u8 out_buf[2];
98 unsigned int blc_i2c_brightness;
99
100 struct i2c_msg msgs[] = {
101 {
102 .addr = lvds_i2c_bus->slave_addr,
103 .flags = 0,
104 .len = 2,
105 .buf = out_buf,
106 }
107 };
108
109 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level *
110 BRIGHTNESS_MASK /
111 BRIGHTNESS_MAX_LEVEL);
112
113 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
114 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness;
115
116 out_buf[0] = dev_priv->lvds_bl->brightnesscmd;
117 out_buf[1] = (u8)blc_i2c_brightness;
118
119 if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1)
120 return 0;
121
122 DRM_ERROR("I2C transfer error\n");
123 return -1;
124}
125
126
127static int cdv_lvds_pwm_set_brightness(struct drm_device *dev, int level)
128{
129 struct drm_psb_private *dev_priv = dev->dev_private;
130
131 u32 max_pwm_blc;
132 u32 blc_pwm_duty_cycle;
133
134 max_pwm_blc = cdv_intel_lvds_get_max_backlight(dev);
135
136
137 BUG_ON((max_pwm_blc & PSB_BLC_MAX_PWM_REG_FREQ) == 0);
138
139 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL;
140
141 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
142 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle;
143
144 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR;
145 REG_WRITE(BLC_PWM_CTL,
146 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
147 (blc_pwm_duty_cycle));
148
149 return 0;
150}
151
152
153
154
155void cdv_intel_lvds_set_brightness(struct drm_device *dev, int level)
156{
157 struct drm_psb_private *dev_priv = dev->dev_private;
158
159 if (!dev_priv->lvds_bl) {
160 DRM_ERROR("NO LVDS Backlight Info\n");
161 return;
162 }
163
164 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE)
165 cdv_lvds_i2c_set_brightness(dev, level);
166 else
167 cdv_lvds_pwm_set_brightness(dev, level);
168}
169#endif
170
171
172
173
174
175
176static void cdv_intel_lvds_set_backlight(struct drm_device *dev, int level)
177{
178 struct drm_psb_private *dev_priv = dev->dev_private;
179 u32 blc_pwm_ctl;
180
181 if (gma_power_begin(dev, false)) {
182 blc_pwm_ctl =
183 REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
184 REG_WRITE(BLC_PWM_CTL,
185 (blc_pwm_ctl |
186 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
187 gma_power_end(dev);
188 } else {
189 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &
190 ~BACKLIGHT_DUTY_CYCLE_MASK;
191 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
192 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
193 }
194}
195
196
197
198
199static void cdv_intel_lvds_set_power(struct drm_device *dev,
200 struct drm_encoder *encoder, bool on)
201{
202 struct drm_psb_private *dev_priv = dev->dev_private;
203 u32 pp_status;
204
205 if (!gma_power_begin(dev, true))
206 return;
207
208 if (on) {
209 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
210 POWER_TARGET_ON);
211 do {
212 pp_status = REG_READ(PP_STATUS);
213 } while ((pp_status & PP_ON) == 0);
214
215 cdv_intel_lvds_set_backlight(dev,
216 dev_priv->mode_dev.backlight_duty_cycle);
217 } else {
218 cdv_intel_lvds_set_backlight(dev, 0);
219
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);
225 }
226 gma_power_end(dev);
227}
228
229static void cdv_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
230{
231 struct drm_device *dev = encoder->dev;
232 if (mode == DRM_MODE_DPMS_ON)
233 cdv_intel_lvds_set_power(dev, encoder, true);
234 else
235 cdv_intel_lvds_set_power(dev, encoder, false);
236
237}
238
239static void cdv_intel_lvds_save(struct drm_connector *connector)
240{
241}
242
243static void cdv_intel_lvds_restore(struct drm_connector *connector)
244{
245}
246
247static int cdv_intel_lvds_mode_valid(struct drm_connector *connector,
248 struct drm_display_mode *mode)
249{
250 struct drm_device *dev = connector->dev;
251 struct drm_psb_private *dev_priv = dev->dev_private;
252 struct drm_display_mode *fixed_mode =
253 dev_priv->mode_dev.panel_fixed_mode;
254
255
256 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
257 return MODE_NO_DBLESCAN;
258
259
260 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
261 return MODE_NO_INTERLACE;
262
263 if (fixed_mode) {
264 if (mode->hdisplay > fixed_mode->hdisplay)
265 return MODE_PANEL;
266 if (mode->vdisplay > fixed_mode->vdisplay)
267 return MODE_PANEL;
268 }
269 return MODE_OK;
270}
271
272static bool cdv_intel_lvds_mode_fixup(struct drm_encoder *encoder,
273 const struct drm_display_mode *mode,
274 struct drm_display_mode *adjusted_mode)
275{
276 struct drm_device *dev = encoder->dev;
277 struct drm_psb_private *dev_priv = dev->dev_private;
278 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
279 struct drm_encoder *tmp_encoder;
280 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;
281
282
283 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,
284 head) {
285 if (tmp_encoder != encoder
286 && tmp_encoder->crtc == encoder->crtc) {
287 printk(KERN_ERR "Can't enable LVDS and another "
288 "encoder on the same pipe\n");
289 return false;
290 }
291 }
292
293
294
295
296
297
298
299 if (panel_fixed_mode != NULL) {
300 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;
301 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;
302 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;
303 adjusted_mode->htotal = panel_fixed_mode->htotal;
304 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;
305 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;
306 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;
307 adjusted_mode->vtotal = panel_fixed_mode->vtotal;
308 adjusted_mode->clock = panel_fixed_mode->clock;
309 drm_mode_set_crtcinfo(adjusted_mode,
310 CRTC_INTERLACE_HALVE_V);
311 }
312
313
314
315
316
317
318
319 return true;
320}
321
322static void cdv_intel_lvds_prepare(struct drm_encoder *encoder)
323{
324 struct drm_device *dev = encoder->dev;
325 struct drm_psb_private *dev_priv = dev->dev_private;
326 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
327
328 if (!gma_power_begin(dev, true))
329 return;
330
331 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
332 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &
333 BACKLIGHT_DUTY_CYCLE_MASK);
334
335 cdv_intel_lvds_set_power(dev, encoder, false);
336
337 gma_power_end(dev);
338}
339
340static void cdv_intel_lvds_commit(struct drm_encoder *encoder)
341{
342 struct drm_device *dev = encoder->dev;
343 struct drm_psb_private *dev_priv = dev->dev_private;
344 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
345
346 if (mode_dev->backlight_duty_cycle == 0)
347 mode_dev->backlight_duty_cycle =
348 cdv_intel_lvds_get_max_backlight(dev);
349
350 cdv_intel_lvds_set_power(dev, encoder, true);
351}
352
353static void cdv_intel_lvds_mode_set(struct drm_encoder *encoder,
354 struct drm_display_mode *mode,
355 struct drm_display_mode *adjusted_mode)
356{
357 struct drm_device *dev = encoder->dev;
358 struct drm_psb_private *dev_priv = dev->dev_private;
359 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc);
360 u32 pfit_control;
361
362
363
364
365
366
367
368
369
370
371
372
373 if (mode->hdisplay != adjusted_mode->hdisplay ||
374 mode->vdisplay != adjusted_mode->vdisplay)
375 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
376 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
377 HORIZ_INTERP_BILINEAR);
378 else
379 pfit_control = 0;
380
381 pfit_control |= gma_crtc->pipe << PFIT_PIPE_SHIFT;
382
383 if (dev_priv->lvds_dither)
384 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
385
386 REG_WRITE(PFIT_CONTROL, pfit_control);
387}
388
389
390
391
392static int cdv_intel_lvds_get_modes(struct drm_connector *connector)
393{
394 struct drm_device *dev = connector->dev;
395 struct drm_psb_private *dev_priv = dev->dev_private;
396 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
397 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
398 int ret;
399
400 ret = psb_intel_ddc_get_modes(connector, &gma_encoder->i2c_bus->adapter);
401
402 if (ret)
403 return ret;
404
405 if (mode_dev->panel_fixed_mode != NULL) {
406 struct drm_display_mode *mode =
407 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
408 drm_mode_probed_add(connector, mode);
409 return 1;
410 }
411
412 return 0;
413}
414
415
416
417
418
419
420
421
422static void cdv_intel_lvds_destroy(struct drm_connector *connector)
423{
424 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
425
426 psb_intel_i2c_destroy(gma_encoder->i2c_bus);
427 drm_connector_unregister(connector);
428 drm_connector_cleanup(connector);
429 kfree(connector);
430}
431
432static int cdv_intel_lvds_set_property(struct drm_connector *connector,
433 struct drm_property *property,
434 uint64_t value)
435{
436 struct drm_encoder *encoder = connector->encoder;
437
438 if (!strcmp(property->name, "scaling mode") && encoder) {
439 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
440 uint64_t curValue;
441
442 if (!crtc)
443 return -1;
444
445 switch (value) {
446 case DRM_MODE_SCALE_FULLSCREEN:
447 break;
448 case DRM_MODE_SCALE_NO_SCALE:
449 break;
450 case DRM_MODE_SCALE_ASPECT:
451 break;
452 default:
453 return -1;
454 }
455
456 if (drm_object_property_get_value(&connector->base,
457 property,
458 &curValue))
459 return -1;
460
461 if (curValue == value)
462 return 0;
463
464 if (drm_object_property_set_value(&connector->base,
465 property,
466 value))
467 return -1;
468
469 if (crtc->saved_mode.hdisplay != 0 &&
470 crtc->saved_mode.vdisplay != 0) {
471 if (!drm_crtc_helper_set_mode(encoder->crtc,
472 &crtc->saved_mode,
473 encoder->crtc->x,
474 encoder->crtc->y,
475 encoder->crtc->primary->fb))
476 return -1;
477 }
478 } else if (!strcmp(property->name, "backlight") && encoder) {
479 if (drm_object_property_set_value(&connector->base,
480 property,
481 value))
482 return -1;
483 else
484 gma_backlight_set(encoder->dev, value);
485 } else if (!strcmp(property->name, "DPMS") && encoder) {
486 const struct drm_encoder_helper_funcs *helpers =
487 encoder->helper_private;
488 helpers->dpms(encoder, value);
489 }
490 return 0;
491}
492
493static const struct drm_encoder_helper_funcs
494 cdv_intel_lvds_helper_funcs = {
495 .dpms = cdv_intel_lvds_encoder_dpms,
496 .mode_fixup = cdv_intel_lvds_mode_fixup,
497 .prepare = cdv_intel_lvds_prepare,
498 .mode_set = cdv_intel_lvds_mode_set,
499 .commit = cdv_intel_lvds_commit,
500};
501
502static const struct drm_connector_helper_funcs
503 cdv_intel_lvds_connector_helper_funcs = {
504 .get_modes = cdv_intel_lvds_get_modes,
505 .mode_valid = cdv_intel_lvds_mode_valid,
506 .best_encoder = gma_best_encoder,
507};
508
509static const struct drm_connector_funcs cdv_intel_lvds_connector_funcs = {
510 .dpms = drm_helper_connector_dpms,
511 .fill_modes = drm_helper_probe_single_connector_modes,
512 .set_property = cdv_intel_lvds_set_property,
513 .destroy = cdv_intel_lvds_destroy,
514};
515
516
517static void cdv_intel_lvds_enc_destroy(struct drm_encoder *encoder)
518{
519 drm_encoder_cleanup(encoder);
520}
521
522static const struct drm_encoder_funcs cdv_intel_lvds_enc_funcs = {
523 .destroy = cdv_intel_lvds_enc_destroy,
524};
525
526
527
528
529
530
531
532
533static bool lvds_is_present_in_vbt(struct drm_device *dev,
534 u8 *i2c_pin)
535{
536 struct drm_psb_private *dev_priv = dev->dev_private;
537 int i;
538
539 if (!dev_priv->child_dev_num)
540 return true;
541
542 for (i = 0; i < dev_priv->child_dev_num; i++) {
543 struct child_device_config *child = dev_priv->child_dev + i;
544
545
546
547
548
549 if (child->device_type != DEVICE_TYPE_INT_LFP &&
550 child->device_type != DEVICE_TYPE_LFP)
551 continue;
552
553 if (child->i2c_pin)
554 *i2c_pin = child->i2c_pin;
555
556
557
558
559
560
561 if (child->addin_offset)
562 return true;
563
564
565
566
567
568
569 if (dev_priv->opregion.vbt)
570 return true;
571 }
572
573 return false;
574}
575
576
577
578
579
580
581
582
583void cdv_intel_lvds_init(struct drm_device *dev,
584 struct psb_intel_mode_device *mode_dev)
585{
586 struct gma_encoder *gma_encoder;
587 struct gma_connector *gma_connector;
588 struct cdv_intel_lvds_priv *lvds_priv;
589 struct drm_connector *connector;
590 struct drm_encoder *encoder;
591 struct drm_display_mode *scan;
592 struct drm_crtc *crtc;
593 struct drm_psb_private *dev_priv = dev->dev_private;
594 u32 lvds;
595 int pipe;
596 u8 pin;
597
598 pin = GMBUS_PORT_PANEL;
599 if (!lvds_is_present_in_vbt(dev, &pin)) {
600 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
601 return;
602 }
603
604 gma_encoder = kzalloc(sizeof(struct gma_encoder),
605 GFP_KERNEL);
606 if (!gma_encoder)
607 return;
608
609 gma_connector = kzalloc(sizeof(struct gma_connector),
610 GFP_KERNEL);
611 if (!gma_connector)
612 goto failed_connector;
613
614 lvds_priv = kzalloc(sizeof(struct cdv_intel_lvds_priv), GFP_KERNEL);
615 if (!lvds_priv)
616 goto failed_lvds_priv;
617
618 gma_encoder->dev_priv = lvds_priv;
619
620 connector = &gma_connector->base;
621 gma_connector->save = cdv_intel_lvds_save;
622 gma_connector->restore = cdv_intel_lvds_restore;
623 encoder = &gma_encoder->base;
624
625
626 drm_connector_init(dev, connector,
627 &cdv_intel_lvds_connector_funcs,
628 DRM_MODE_CONNECTOR_LVDS);
629
630 drm_encoder_init(dev, encoder,
631 &cdv_intel_lvds_enc_funcs,
632 DRM_MODE_ENCODER_LVDS, NULL);
633
634
635 gma_connector_attach_encoder(gma_connector, gma_encoder);
636 gma_encoder->type = INTEL_OUTPUT_LVDS;
637
638 drm_encoder_helper_add(encoder, &cdv_intel_lvds_helper_funcs);
639 drm_connector_helper_add(connector,
640 &cdv_intel_lvds_connector_helper_funcs);
641 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
642 connector->interlace_allowed = false;
643 connector->doublescan_allowed = false;
644
645
646 drm_object_attach_property(&connector->base,
647 dev->mode_config.scaling_mode_property,
648 DRM_MODE_SCALE_FULLSCREEN);
649 drm_object_attach_property(&connector->base,
650 dev_priv->backlight_property,
651 BRIGHTNESS_MAX_LEVEL);
652
653
654
655
656
657 gma_encoder->i2c_bus = psb_intel_i2c_create(dev,
658 GPIOB,
659 "LVDSBLC_B");
660 if (!gma_encoder->i2c_bus) {
661 dev_printk(KERN_ERR,
662 &dev->pdev->dev, "I2C bus registration failed.\n");
663 goto failed_blc_i2c;
664 }
665 gma_encoder->i2c_bus->slave_addr = 0x2C;
666 dev_priv->lvds_i2c_bus = gma_encoder->i2c_bus;
667
668
669
670
671
672
673
674
675
676
677
678
679 gma_encoder->ddc_bus = psb_intel_i2c_create(dev,
680 GPIOC,
681 "LVDSDDC_C");
682 if (!gma_encoder->ddc_bus) {
683 dev_printk(KERN_ERR, &dev->pdev->dev,
684 "DDC bus registration " "failed.\n");
685 goto failed_ddc;
686 }
687
688
689
690
691
692 mutex_lock(&dev->mode_config.mutex);
693 psb_intel_ddc_get_modes(connector,
694 &gma_encoder->ddc_bus->adapter);
695 list_for_each_entry(scan, &connector->probed_modes, head) {
696 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
697 mode_dev->panel_fixed_mode =
698 drm_mode_duplicate(dev, scan);
699 goto out;
700 }
701 }
702
703
704 if (dev_priv->lfp_lvds_vbt_mode) {
705 mode_dev->panel_fixed_mode =
706 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
707 if (mode_dev->panel_fixed_mode) {
708 mode_dev->panel_fixed_mode->type |=
709 DRM_MODE_TYPE_PREFERRED;
710 goto out;
711 }
712 }
713
714
715
716
717
718 lvds = REG_READ(LVDS);
719 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
720 crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
721
722 if (crtc && (lvds & LVDS_PORT_EN)) {
723 mode_dev->panel_fixed_mode =
724 cdv_intel_crtc_mode_get(dev, crtc);
725 if (mode_dev->panel_fixed_mode) {
726 mode_dev->panel_fixed_mode->type |=
727 DRM_MODE_TYPE_PREFERRED;
728 goto out;
729 }
730 }
731
732
733 if (!mode_dev->panel_fixed_mode) {
734 DRM_DEBUG
735 ("Found no modes on the lvds, ignoring the LVDS\n");
736 goto failed_find;
737 }
738
739
740 {
741 u32 pwm;
742
743 pwm = REG_READ(BLC_PWM_CTL2);
744 if (pipe == 1)
745 pwm |= PWM_PIPE_B;
746 else
747 pwm &= ~PWM_PIPE_B;
748 pwm |= PWM_ENABLE;
749 REG_WRITE(BLC_PWM_CTL2, pwm);
750 }
751
752out:
753 mutex_unlock(&dev->mode_config.mutex);
754 drm_connector_register(connector);
755 return;
756
757failed_find:
758 mutex_unlock(&dev->mode_config.mutex);
759 printk(KERN_ERR "Failed find\n");
760 psb_intel_i2c_destroy(gma_encoder->ddc_bus);
761failed_ddc:
762 printk(KERN_ERR "Failed DDC\n");
763 psb_intel_i2c_destroy(gma_encoder->i2c_bus);
764failed_blc_i2c:
765 printk(KERN_ERR "Failed BLC\n");
766 drm_encoder_cleanup(encoder);
767 drm_connector_cleanup(connector);
768 kfree(lvds_priv);
769failed_lvds_priv:
770 kfree(gma_connector);
771failed_connector:
772 kfree(gma_encoder);
773}
774