Free Electrons

Embedded Linux Experts

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
/*
 * Copyright (C) 2010 Texas Instruments Inc
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/wait.h>
#include <linux/time.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/err.h>

#include <media/v4l2-device.h>
#include <media/davinci/vpbe_types.h>
#include <media/davinci/vpbe.h>
#include <media/davinci/vpss.h>
#include <media/davinci/vpbe_venc.h>

#define VPBE_DEFAULT_OUTPUT	"Composite"
#define VPBE_DEFAULT_MODE	"ntsc"

static char *def_output = VPBE_DEFAULT_OUTPUT;
static char *def_mode = VPBE_DEFAULT_MODE;
static int debug;

module_param(def_output, charp, S_IRUGO);
module_param(def_mode, charp, S_IRUGO);
module_param(debug, int, 0644);

MODULE_PARM_DESC(def_output, "vpbe output name (default:Composite)");
MODULE_PARM_DESC(def_mode, "vpbe output mode name (default:ntsc");
MODULE_PARM_DESC(debug, "Debug level 0-1");

MODULE_DESCRIPTION("TI DMXXX VPBE Display controller");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Texas Instruments");

/**
 * vpbe_current_encoder_info - Get config info for current encoder
 * @vpbe_dev - vpbe device ptr
 *
 * Return ptr to current encoder config info
 */
static struct encoder_config_info*
vpbe_current_encoder_info(struct vpbe_device *vpbe_dev)
{
	struct vpbe_config *cfg = vpbe_dev->cfg;
	int index = vpbe_dev->current_sd_index;

	return ((index == 0) ? &cfg->venc :
				&cfg->ext_encoders[index-1]);
}

/**
 * vpbe_find_encoder_sd_index - Given a name find encoder sd index
 *
 * @vpbe_config - ptr to vpbe cfg
 * @output_index - index used by application
 *
 * Return sd index of the encoder
 */
static int vpbe_find_encoder_sd_index(struct vpbe_config *cfg,
			     int index)
{
	char *encoder_name = cfg->outputs[index].subdev_name;
	int i;

	/* Venc is always first	*/
	if (!strcmp(encoder_name, cfg->venc.module_name))
		return 0;

	for (i = 0; i < cfg->num_ext_encoders; i++) {
		if (!strcmp(encoder_name,
		     cfg->ext_encoders[i].module_name))
			return i+1;
	}

	return -EINVAL;
}

/**
 * vpbe_g_cropcap - Get crop capabilities of the display
 * @vpbe_dev - vpbe device ptr
 * @cropcap - cropcap is a ptr to struct v4l2_cropcap
 *
 * Update the crop capabilities in crop cap for current
 * mode
 */
static int vpbe_g_cropcap(struct vpbe_device *vpbe_dev,
			  struct v4l2_cropcap *cropcap)
{
	if (!cropcap)
		return -EINVAL;
	cropcap->bounds.left = 0;
	cropcap->bounds.top = 0;
	cropcap->bounds.width = vpbe_dev->current_timings.xres;
	cropcap->bounds.height = vpbe_dev->current_timings.yres;
	cropcap->defrect = cropcap->bounds;

	return 0;
}

/**
 * vpbe_enum_outputs - enumerate outputs
 * @vpbe_dev - vpbe device ptr
 * @output - ptr to v4l2_output structure
 *
 * Enumerates the outputs available at the vpbe display
 * returns the status, -EINVAL if end of output list
 */
static int vpbe_enum_outputs(struct vpbe_device *vpbe_dev,
			     struct v4l2_output *output)
{
	struct vpbe_config *cfg = vpbe_dev->cfg;
	int temp_index = output->index;

	if (temp_index >= cfg->num_outputs)
		return -EINVAL;

	*output = cfg->outputs[temp_index].output;
	output->index = temp_index;

	return 0;
}

static int vpbe_get_mode_info(struct vpbe_device *vpbe_dev, char *mode,
			      int output_index)
{
	struct vpbe_config *cfg = vpbe_dev->cfg;
	struct vpbe_enc_mode_info var;
	int curr_output = output_index;
	int i;

	if (!mode)
		return -EINVAL;

	for (i = 0; i < cfg->outputs[curr_output].num_modes; i++) {
		var = cfg->outputs[curr_output].modes[i];
		if (!strcmp(mode, var.name)) {
			vpbe_dev->current_timings = var;
			return 0;
		}
	}

	return -EINVAL;
}

static int vpbe_get_current_mode_info(struct vpbe_device *vpbe_dev,
				      struct vpbe_enc_mode_info *mode_info)
{
	if (!mode_info)
		return -EINVAL;

	*mode_info = vpbe_dev->current_timings;

	return 0;
}

/* Get std by std id */
static int vpbe_get_std_info(struct vpbe_device *vpbe_dev,
			     v4l2_std_id std_id)
{
	struct vpbe_config *cfg = vpbe_dev->cfg;
	struct vpbe_enc_mode_info var;
	int curr_output = vpbe_dev->current_out_index;
	int i;

	for (i = 0; i < vpbe_dev->cfg->outputs[curr_output].num_modes; i++) {
		var = cfg->outputs[curr_output].modes[i];
		if ((var.timings_type & VPBE_ENC_STD) &&
		  (var.std_id & std_id)) {
			vpbe_dev->current_timings = var;
			return 0;
		}
	}

	return -EINVAL;
}

static int vpbe_get_std_info_by_name(struct vpbe_device *vpbe_dev,
				char *std_name)
{
	struct vpbe_config *cfg = vpbe_dev->cfg;
	struct vpbe_enc_mode_info var;
	int curr_output = vpbe_dev->current_out_index;
	int i;

	for (i = 0; i < vpbe_dev->cfg->outputs[curr_output].num_modes; i++) {
		var = cfg->outputs[curr_output].modes[i];
		if (!strcmp(var.name, std_name)) {
			vpbe_dev->current_timings = var;
			return 0;
		}
	}

	return -EINVAL;
}

/**
 * vpbe_set_output - Set output
 * @vpbe_dev - vpbe device ptr
 * @index - index of output
 *
 * Set vpbe output to the output specified by the index
 */
static int vpbe_set_output(struct vpbe_device *vpbe_dev, int index)
{
	struct encoder_config_info *curr_enc_info =
			vpbe_current_encoder_info(vpbe_dev);
	struct vpbe_config *cfg = vpbe_dev->cfg;
	struct venc_platform_data *venc_device = vpbe_dev->venc_device;
	int enc_out_index;
	int sd_index;
	int ret;

	if (index >= cfg->num_outputs)
		return -EINVAL;

	mutex_lock(&vpbe_dev->lock);

	sd_index = vpbe_dev->current_sd_index;
	enc_out_index = cfg->outputs[index].output.index;
	/*
	 * Currently we switch the encoder based on output selected
	 * by the application. If media controller is implemented later
	 * there is will be an API added to setup_link between venc
	 * and external encoder. So in that case below comparison always
	 * match and encoder will not be switched. But if application
	 * chose not to use media controller, then this provides current
	 * way of switching encoder at the venc output.
	 */
	if (strcmp(curr_enc_info->module_name,
		   cfg->outputs[index].subdev_name)) {
		/* Need to switch the encoder at the output */
		sd_index = vpbe_find_encoder_sd_index(cfg, index);
		if (sd_index < 0) {
			ret = -EINVAL;
			goto unlock;
		}

		ret = venc_device->setup_if_config(cfg->outputs[index].if_params);
		if (ret)
			goto unlock;
	}

	/* Set output at the encoder */
	ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
				       s_routing, 0, enc_out_index, 0);
	if (ret)
		goto unlock;

	/*
	 * It is assumed that venc or extenal encoder will set a default
	 * mode in the sub device. For external encoder or LCD pannel output,
	 * we also need to set up the lcd port for the required mode. So setup
	 * the lcd port for the default mode that is configured in the board
	 * arch/arm/mach-davinci/board-dm355-evm.setup file for the external
	 * encoder.
	 */
	ret = vpbe_get_mode_info(vpbe_dev,
				 cfg->outputs[index].default_mode, index);
	if (!ret) {
		struct osd_state *osd_device = vpbe_dev->osd_device;

		osd_device->ops.set_left_margin(osd_device,
			vpbe_dev->current_timings.left_margin);
		osd_device->ops.set_top_margin(osd_device,
		vpbe_dev->current_timings.upper_margin);
		vpbe_dev->current_sd_index = sd_index;
		vpbe_dev->current_out_index = index;
	}
unlock:
	mutex_unlock(&vpbe_dev->lock);
	return ret;
}

static int vpbe_set_default_output(struct vpbe_device *vpbe_dev)
{
	struct vpbe_config *cfg = vpbe_dev->cfg;
	int i;

	for (i = 0; i < cfg->num_outputs; i++) {
		if (!strcmp(def_output,
			    cfg->outputs[i].output.name)) {
			int ret = vpbe_set_output(vpbe_dev, i);

			if (!ret)
				vpbe_dev->current_out_index = i;
			return ret;
		}
	}
	return 0;
}

/**
 * vpbe_get_output - Get output
 * @vpbe_dev - vpbe device ptr
 *
 * return current vpbe output to the the index
 */
static unsigned int vpbe_get_output(struct vpbe_device *vpbe_dev)
{
	return vpbe_dev->current_out_index;
}

/**
 * vpbe_s_dv_timings - Set the given preset timings in the encoder
 *
 * Sets the timings if supported by the current encoder. Return the status.
 * 0 - success & -EINVAL on error
 */
static int vpbe_s_dv_timings(struct vpbe_device *vpbe_dev,
		    struct v4l2_dv_timings *dv_timings)
{
	struct vpbe_config *cfg = vpbe_dev->cfg;
	int out_index = vpbe_dev->current_out_index;
	struct vpbe_output *output = &cfg->outputs[out_index];
	int sd_index = vpbe_dev->current_sd_index;
	int ret, i;


	if (!(cfg->outputs[out_index].output.capabilities &
	    V4L2_OUT_CAP_DV_TIMINGS))
		return -ENODATA;

	for (i = 0; i < output->num_modes; i++) {
		if (output->modes[i].timings_type == VPBE_ENC_DV_TIMINGS &&
		    !memcmp(&output->modes[i].dv_timings,
				dv_timings, sizeof(*dv_timings)))
			break;
	}
	if (i >= output->num_modes)
		return -EINVAL;
	vpbe_dev->current_timings = output->modes[i];
	mutex_lock(&vpbe_dev->lock);

	ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
					s_dv_timings, dv_timings);
	if (!ret && vpbe_dev->amp) {
		/* Call amplifier subdevice */
		ret = v4l2_subdev_call(vpbe_dev->amp, video,
				s_dv_timings, dv_timings);
	}
	/* set the lcd controller output for the given mode */
	if (!ret) {
		struct osd_state *osd_device = vpbe_dev->osd_device;

		osd_device->ops.set_left_margin(osd_device,
		vpbe_dev->current_timings.left_margin);
		osd_device->ops.set_top_margin(osd_device,
		vpbe_dev->current_timings.upper_margin);
	}
	mutex_unlock(&vpbe_dev->lock);

	return ret;
}

/**
 * vpbe_g_dv_timings - Get the timings in the current encoder
 *
 * Get the timings in the current encoder. Return the status. 0 - success
 * -EINVAL on error
 */
static int vpbe_g_dv_timings(struct vpbe_device *vpbe_dev,
		     struct v4l2_dv_timings *dv_timings)
{
	struct vpbe_config *cfg = vpbe_dev->cfg;
	int out_index = vpbe_dev->current_out_index;

	if (!(cfg->outputs[out_index].output.capabilities &
		V4L2_OUT_CAP_DV_TIMINGS))
		return -ENODATA;

	if (vpbe_dev->current_timings.timings_type &
	  VPBE_ENC_DV_TIMINGS) {
		*dv_timings = vpbe_dev->current_timings.dv_timings;
		return 0;
	}

	return -EINVAL;
}

/**
 * vpbe_enum_dv_timings - Enumerate the dv timings in the current encoder
 *
 * Get the timings in the current encoder. Return the status. 0 - success
 * -EINVAL on error
 */
static int vpbe_enum_dv_timings(struct vpbe_device *vpbe_dev,
			 struct v4l2_enum_dv_timings *timings)
{
	struct vpbe_config *cfg = vpbe_dev->cfg;
	int out_index = vpbe_dev->current_out_index;
	struct vpbe_output *output = &cfg->outputs[out_index];
	int j = 0;
	int i;

	if (!(output->output.capabilities & V4L2_OUT_CAP_DV_TIMINGS))
		return -ENODATA;

	for (i = 0; i < output->num_modes; i++) {
		if (output->modes[i].timings_type == VPBE_ENC_DV_TIMINGS) {
			if (j == timings->index)
				break;
			j++;
		}
	}

	if (i == output->num_modes)
		return -EINVAL;
	timings->timings = output->modes[i].dv_timings;
	return 0;
}

/**
 * vpbe_s_std - Set the given standard in the encoder
 *
 * Sets the standard if supported by the current encoder. Return the status.
 * 0 - success & -EINVAL on error
 */
static int vpbe_s_std(struct vpbe_device *vpbe_dev, v4l2_std_id std_id)
{
	struct vpbe_config *cfg = vpbe_dev->cfg;
	int out_index = vpbe_dev->current_out_index;
	int sd_index = vpbe_dev->current_sd_index;
	int ret;

	if (!(cfg->outputs[out_index].output.capabilities &
		V4L2_OUT_CAP_STD))
		return -ENODATA;

	ret = vpbe_get_std_info(vpbe_dev, std_id);
	if (ret)
		return ret;

	mutex_lock(&vpbe_dev->lock);

	ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
			       s_std_output, std_id);
	/* set the lcd controller output for the given mode */
	if (!ret) {
		struct osd_state *osd_device = vpbe_dev->osd_device;

		osd_device->ops.set_left_margin(osd_device,
		vpbe_dev->current_timings.left_margin);
		osd_device->ops.set_top_margin(osd_device,
		vpbe_dev->current_timings.upper_margin);
	}
	mutex_unlock(&vpbe_dev->lock);

	return ret;
}

/**
 * vpbe_g_std - Get the standard in the current encoder
 *
 * Get the standard in the current encoder. Return the status. 0 - success
 * -EINVAL on error
 */
static int vpbe_g_std(struct vpbe_device *vpbe_dev, v4l2_std_id *std_id)
{
	struct vpbe_enc_mode_info *cur_timings = &vpbe_dev->current_timings;
	struct vpbe_config *cfg = vpbe_dev->cfg;
	int out_index = vpbe_dev->current_out_index;

	if (!(cfg->outputs[out_index].output.capabilities & V4L2_OUT_CAP_STD))
		return -ENODATA;

	if (cur_timings->timings_type & VPBE_ENC_STD) {
		*std_id = cur_timings->std_id;
		return 0;
	}

	return -EINVAL;
}

/**
 * vpbe_set_mode - Set mode in the current encoder using mode info
 *
 * Use the mode string to decide what timings to set in the encoder
 * This is typically useful when fbset command is used to change the current
 * timings by specifying a string to indicate the timings.
 */
static int vpbe_set_mode(struct vpbe_device *vpbe_dev,
			 struct vpbe_enc_mode_info *mode_info)
{
	struct vpbe_enc_mode_info *preset_mode = NULL;
	struct vpbe_config *cfg = vpbe_dev->cfg;
	struct v4l2_dv_timings dv_timings;
	struct osd_state *osd_device;
	int out_index = vpbe_dev->current_out_index;
	int i;

	if (!mode_info || !mode_info->name)
		return -EINVAL;

	for (i = 0; i < cfg->outputs[out_index].num_modes; i++) {
		if (!strcmp(mode_info->name,
		     cfg->outputs[out_index].modes[i].name)) {
			preset_mode = &cfg->outputs[out_index].modes[i];
			/*
			 * it may be one of the 3 timings type. Check and
			 * invoke right API
			 */
			if (preset_mode->timings_type & VPBE_ENC_STD)
				return vpbe_s_std(vpbe_dev,
						 preset_mode->std_id);
			if (preset_mode->timings_type &
						VPBE_ENC_DV_TIMINGS) {
				dv_timings =
					preset_mode->dv_timings;
				return vpbe_s_dv_timings(vpbe_dev, &dv_timings);
			}
		}
	}

	/* Only custom timing should reach here */
	if (!preset_mode)
		return -EINVAL;

	mutex_lock(&vpbe_dev->lock);

	osd_device = vpbe_dev->osd_device;
	vpbe_dev->current_timings = *preset_mode;
	osd_device->ops.set_left_margin(osd_device,
		vpbe_dev->current_timings.left_margin);
	osd_device->ops.set_top_margin(osd_device,
		vpbe_dev->current_timings.upper_margin);

	mutex_unlock(&vpbe_dev->lock);
	return 0;
}

static int vpbe_set_default_mode(struct vpbe_device *vpbe_dev)
{
	int ret;

	ret = vpbe_get_std_info_by_name(vpbe_dev, def_mode);
	if (ret)
		return ret;

	/* set the default mode in the encoder */
	return vpbe_set_mode(vpbe_dev, &vpbe_dev->current_timings);
}

static int platform_device_get(struct device *dev, void *data)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct vpbe_device *vpbe_dev = data;

	if (strstr(pdev->name, "vpbe-osd"))
		vpbe_dev->osd_device = platform_get_drvdata(pdev);
	if (strstr(pdev->name, "vpbe-venc"))
		vpbe_dev->venc_device = dev_get_platdata(&pdev->dev);

	return 0;
}

/**
 * vpbe_initialize() - Initialize the vpbe display controller
 * @vpbe_dev - vpbe device ptr
 *
 * Master frame buffer device drivers calls this to initialize vpbe
 * display controller. This will then registers v4l2 device and the sub
 * devices and sets a current encoder sub device for display. v4l2 display
 * device driver is the master and frame buffer display device driver is
 * the slave. Frame buffer display driver checks the initialized during
 * probe and exit if not initialized. Returns status.
 */
static int vpbe_initialize(struct device *dev, struct vpbe_device *vpbe_dev)
{
	struct encoder_config_info *enc_info;
	struct amp_config_info *amp_info;
	struct v4l2_subdev **enc_subdev;
	struct osd_state *osd_device;
	struct i2c_adapter *i2c_adap;
	int num_encoders;
	int ret = 0;
	int err;
	int i;

	/*
	 * v4l2 abd FBDev frame buffer devices will get the vpbe_dev pointer
	 * from the platform device by iteration of platform drivers and
	 * matching with device name
	 */
	if (!vpbe_dev || !dev) {
		printk(KERN_ERR "Null device pointers.\n");
		return -ENODEV;
	}

	if (vpbe_dev->initialized)
		return 0;

	mutex_lock(&vpbe_dev->lock);

	if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
		/* We have dac clock available for platform */
		vpbe_dev->dac_clk = clk_get(vpbe_dev->pdev, "vpss_dac");
		if (IS_ERR(vpbe_dev->dac_clk)) {
			ret =  PTR_ERR(vpbe_dev->dac_clk);
			goto fail_mutex_unlock;
		}
		if (clk_prepare_enable(vpbe_dev->dac_clk)) {
			ret =  -ENODEV;
			clk_put(vpbe_dev->dac_clk);
			goto fail_mutex_unlock;
		}
	}

	/* first enable vpss clocks */
	vpss_enable_clock(VPSS_VPBE_CLOCK, 1);

	/* First register a v4l2 device */
	ret = v4l2_device_register(dev, &vpbe_dev->v4l2_dev);
	if (ret) {
		v4l2_err(dev->driver,
			"Unable to register v4l2 device.\n");
		goto fail_clk_put;
	}
	v4l2_info(&vpbe_dev->v4l2_dev, "vpbe v4l2 device registered\n");

	err = bus_for_each_dev(&platform_bus_type, NULL, vpbe_dev,
			       platform_device_get);
	if (err < 0) {
		ret = err;
		goto fail_dev_unregister;
	}

	vpbe_dev->venc = venc_sub_dev_init(&vpbe_dev->v4l2_dev,
					   vpbe_dev->cfg->venc.module_name);
	/* register venc sub device */
	if (!vpbe_dev->venc) {
		v4l2_err(&vpbe_dev->v4l2_dev,
			"vpbe unable to init venc sub device\n");
		ret = -ENODEV;
		goto fail_dev_unregister;
	}
	/* initialize osd device */
	osd_device = vpbe_dev->osd_device;
	if (osd_device->ops.initialize) {
		err = osd_device->ops.initialize(osd_device);
		if (err) {
			v4l2_err(&vpbe_dev->v4l2_dev,
				 "unable to initialize the OSD device");
			err = -ENOMEM;
			goto fail_dev_unregister;
		}
	}

	/*
	 * Register any external encoders that are configured. At index 0 we
	 * store venc sd index.
	 */
	num_encoders = vpbe_dev->cfg->num_ext_encoders + 1;
	vpbe_dev->encoders = kmalloc_array(num_encoders,
					   sizeof(*vpbe_dev->encoders),
					   GFP_KERNEL);
	if (!vpbe_dev->encoders) {
		ret = -ENOMEM;
		goto fail_dev_unregister;
	}

	i2c_adap = i2c_get_adapter(vpbe_dev->cfg->i2c_adapter_id);
	for (i = 0; i < (vpbe_dev->cfg->num_ext_encoders + 1); i++) {
		if (i == 0) {
			/* venc is at index 0 */
			enc_subdev = &vpbe_dev->encoders[i];
			*enc_subdev = vpbe_dev->venc;
			continue;
		}
		enc_info = &vpbe_dev->cfg->ext_encoders[i];
		if (enc_info->is_i2c) {
			enc_subdev = &vpbe_dev->encoders[i];
			*enc_subdev = v4l2_i2c_new_subdev_board(
						&vpbe_dev->v4l2_dev, i2c_adap,
						&enc_info->board_info, NULL);
			if (*enc_subdev)
				v4l2_info(&vpbe_dev->v4l2_dev,
					  "v4l2 sub device %s registered\n",
					  enc_info->module_name);
			else {
				v4l2_err(&vpbe_dev->v4l2_dev, "encoder %s failed to register",
					 enc_info->module_name);
				ret = -ENODEV;
				goto fail_kfree_encoders;
			}
		} else
			v4l2_warn(&vpbe_dev->v4l2_dev, "non-i2c encoders currently not supported");
	}
	/* Add amplifier subdevice for dm365 */
	if ((strcmp(vpbe_dev->cfg->module_name, "dm365-vpbe-display") == 0) &&
	   vpbe_dev->cfg->amp) {
		amp_info = vpbe_dev->cfg->amp;
		if (amp_info->is_i2c) {
			vpbe_dev->amp = v4l2_i2c_new_subdev_board(
			&vpbe_dev->v4l2_dev, i2c_adap,
			&amp_info->board_info, NULL);
			if (!vpbe_dev->amp) {
				v4l2_err(&vpbe_dev->v4l2_dev,
					 "amplifier %s failed to register",
					 amp_info->module_name);
				ret = -ENODEV;
				goto fail_kfree_encoders;
			}
			v4l2_info(&vpbe_dev->v4l2_dev,
					  "v4l2 sub device %s registered\n",
					  amp_info->module_name);
		} else {
			    vpbe_dev->amp = NULL;
			    v4l2_warn(&vpbe_dev->v4l2_dev, "non-i2c amplifiers currently not supported");
		}
	} else {
	    vpbe_dev->amp = NULL;
	}

	/* set the current encoder and output to that of venc by default */
	vpbe_dev->current_sd_index = 0;
	vpbe_dev->current_out_index = 0;

	mutex_unlock(&vpbe_dev->lock);

	printk(KERN_NOTICE "Setting default output to %s\n", def_output);
	ret = vpbe_set_default_output(vpbe_dev);
	if (ret) {
		v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default output %s",
			 def_output);
		return ret;
	}

	printk(KERN_NOTICE "Setting default mode to %s\n", def_mode);
	ret = vpbe_set_default_mode(vpbe_dev);
	if (ret) {
		v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default mode %s",
			 def_mode);
		return ret;
	}
	vpbe_dev->initialized = 1;
	/* TBD handling of bootargs for default output and mode */
	return 0;

fail_kfree_encoders:
	kfree(vpbe_dev->encoders);
fail_dev_unregister:
	v4l2_device_unregister(&vpbe_dev->v4l2_dev);
fail_clk_put:
	if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
		clk_disable_unprepare(vpbe_dev->dac_clk);
		clk_put(vpbe_dev->dac_clk);
	}
fail_mutex_unlock:
	mutex_unlock(&vpbe_dev->lock);
	return ret;
}

/**
 * vpbe_deinitialize() - de-initialize the vpbe display controller
 * @dev - Master and slave device ptr
 *
 * vpbe_master and slave frame buffer devices calls this to de-initialize
 * the display controller. It is called when master and slave device
 * driver modules are removed and no longer requires the display controller.
 */
static void vpbe_deinitialize(struct device *dev, struct vpbe_device *vpbe_dev)
{
	v4l2_device_unregister(&vpbe_dev->v4l2_dev);
	if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
		clk_disable_unprepare(vpbe_dev->dac_clk);
		clk_put(vpbe_dev->dac_clk);
	}

	kfree(vpbe_dev->amp);
	kfree(vpbe_dev->encoders);
	vpbe_dev->initialized = 0;
	/* disable vpss clocks */
	vpss_enable_clock(VPSS_VPBE_CLOCK, 0);
}

static const struct vpbe_device_ops vpbe_dev_ops = {
	.g_cropcap = vpbe_g_cropcap,
	.enum_outputs = vpbe_enum_outputs,
	.set_output = vpbe_set_output,
	.get_output = vpbe_get_output,
	.s_dv_timings = vpbe_s_dv_timings,
	.g_dv_timings = vpbe_g_dv_timings,
	.enum_dv_timings = vpbe_enum_dv_timings,
	.s_std = vpbe_s_std,
	.g_std = vpbe_g_std,
	.initialize = vpbe_initialize,
	.deinitialize = vpbe_deinitialize,
	.get_mode_info = vpbe_get_current_mode_info,
	.set_mode = vpbe_set_mode,
};

static int vpbe_probe(struct platform_device *pdev)
{
	struct vpbe_device *vpbe_dev;
	struct vpbe_config *cfg;

	if (!pdev->dev.platform_data) {
		v4l2_err(pdev->dev.driver, "No platform data\n");
		return -ENODEV;
	}
	cfg = pdev->dev.platform_data;

	if (!cfg->module_name[0] ||
	    !cfg->osd.module_name[0] ||
	    !cfg->venc.module_name[0]) {
		v4l2_err(pdev->dev.driver, "vpbe display module names not defined\n");
		return -EINVAL;
	}

	vpbe_dev = kzalloc(sizeof(*vpbe_dev), GFP_KERNEL);
	if (!vpbe_dev)
		return -ENOMEM;

	vpbe_dev->cfg = cfg;
	vpbe_dev->ops = vpbe_dev_ops;
	vpbe_dev->pdev = &pdev->dev;

	if (cfg->outputs->num_modes > 0)
		vpbe_dev->current_timings = vpbe_dev->cfg->outputs[0].modes[0];
	else {
		kfree(vpbe_dev);
		return -ENODEV;
	}

	/* set the driver data in platform device */
	platform_set_drvdata(pdev, vpbe_dev);
	mutex_init(&vpbe_dev->lock);

	return 0;
}

static int vpbe_remove(struct platform_device *device)
{
	struct vpbe_device *vpbe_dev = platform_get_drvdata(device);

	kfree(vpbe_dev);

	return 0;
}

static struct platform_driver vpbe_driver = {
	.driver	= {
		.name	= "vpbe_controller",
	},
	.probe = vpbe_probe,
	.remove = vpbe_remove,
};

module_platform_driver(vpbe_driver);