summaryrefslogtreecommitdiffstats
path: root/drivers/media/platform/renesas/vsp1/vsp1_entity.c
blob: c31f05a80bb5679a80e27ac84dc1b11bf952aad1 (plain)
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
// SPDX-License-Identifier: GPL-2.0+
/*
 * vsp1_entity.c  --  R-Car VSP1 Base Entity
 *
 * Copyright (C) 2013-2014 Renesas Electronics Corporation
 *
 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 */

#include <linux/device.h>
#include <linux/gfp.h>

#include <media/media-entity.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-subdev.h>

#include "vsp1.h"
#include "vsp1_dl.h"
#include "vsp1_entity.h"
#include "vsp1_pipe.h"
#include "vsp1_rwpf.h"

void vsp1_entity_route_setup(struct vsp1_entity *entity,
			     struct vsp1_pipeline *pipe,
			     struct vsp1_dl_body *dlb)
{
	struct vsp1_entity *source;
	u32 route;

	if (entity->type == VSP1_ENTITY_HGO) {
		u32 smppt;

		/*
		 * The HGO is a special case, its routing is configured on the
		 * sink pad.
		 */
		source = entity->sources[0];
		smppt = (pipe->output->entity.index << VI6_DPR_SMPPT_TGW_SHIFT)
		      | (source->route->output << VI6_DPR_SMPPT_PT_SHIFT);

		vsp1_dl_body_write(dlb, VI6_DPR_HGO_SMPPT, smppt);
		return;
	} else if (entity->type == VSP1_ENTITY_HGT) {
		u32 smppt;

		/*
		 * The HGT is a special case, its routing is configured on the
		 * sink pad.
		 */
		source = entity->sources[0];
		smppt = (pipe->output->entity.index << VI6_DPR_SMPPT_TGW_SHIFT)
		      | (source->route->output << VI6_DPR_SMPPT_PT_SHIFT);

		vsp1_dl_body_write(dlb, VI6_DPR_HGT_SMPPT, smppt);
		return;
	}

	source = entity;
	if (source->route->reg == 0)
		return;

	route = source->sink->route->inputs[source->sink_pad];
	/*
	 * The ILV and BRS share the same data path route. The extra BRSSEL bit
	 * selects between the ILV and BRS.
	 */
	if (source->type == VSP1_ENTITY_BRS)
		route |= VI6_DPR_ROUTE_BRSSEL;
	vsp1_dl_body_write(dlb, source->route->reg, route);
}

void vsp1_entity_configure_stream(struct vsp1_entity *entity,
				  struct vsp1_pipeline *pipe,
				  struct vsp1_dl_list *dl,
				  struct vsp1_dl_body *dlb)
{
	if (entity->ops->configure_stream)
		entity->ops->configure_stream(entity, pipe, dl, dlb);
}

void vsp1_entity_configure_frame(struct vsp1_entity *entity,
				 struct vsp1_pipeline *pipe,
				 struct vsp1_dl_list *dl,
				 struct vsp1_dl_body *dlb)
{
	if (entity->ops->configure_frame)
		entity->ops->configure_frame(entity, pipe, dl, dlb);
}

void vsp1_entity_configure_partition(struct vsp1_entity *entity,
				     struct vsp1_pipeline *pipe,
				     struct vsp1_dl_list *dl,
				     struct vsp1_dl_body *dlb)
{
	if (entity->ops->configure_partition)
		entity->ops->configure_partition(entity, pipe, dl, dlb);
}

/* -----------------------------------------------------------------------------
 * V4L2 Subdevice Operations
 */

/**
 * vsp1_entity_get_pad_config - Get the pad configuration for an entity
 * @entity: the entity
 * @sd_state: the TRY state
 * @which: configuration selector (ACTIVE or TRY)
 *
 * When called with which set to V4L2_SUBDEV_FORMAT_ACTIVE the caller must hold
 * the entity lock to access the returned configuration.
 *
 * Return the pad configuration requested by the which argument. The TRY
 * configuration is passed explicitly to the function through the cfg argument
 * and simply returned when requested. The ACTIVE configuration comes from the
 * entity structure.
 */
struct v4l2_subdev_state *
vsp1_entity_get_pad_config(struct vsp1_entity *entity,
			   struct v4l2_subdev_state *sd_state,
			   enum v4l2_subdev_format_whence which)
{
	switch (which) {
	case V4L2_SUBDEV_FORMAT_ACTIVE:
		return entity->config;
	case V4L2_SUBDEV_FORMAT_TRY:
	default:
		return sd_state;
	}
}

/**
 * vsp1_entity_get_pad_format - Get a pad format from storage for an entity
 * @entity: the entity
 * @sd_state: the state storage
 * @pad: the pad number
 *
 * Return the format stored in the given configuration for an entity's pad. The
 * configuration can be an ACTIVE or TRY configuration.
 */
struct v4l2_mbus_framefmt *
vsp1_entity_get_pad_format(struct vsp1_entity *entity,
			   struct v4l2_subdev_state *sd_state,
			   unsigned int pad)
{
	return v4l2_subdev_get_try_format(&entity->subdev, sd_state, pad);
}

/**
 * vsp1_entity_get_pad_selection - Get a pad selection from storage for entity
 * @entity: the entity
 * @sd_state: the state storage
 * @pad: the pad number
 * @target: the selection target
 *
 * Return the selection rectangle stored in the given configuration for an
 * entity's pad. The configuration can be an ACTIVE or TRY configuration. The
 * selection target can be COMPOSE or CROP.
 */
struct v4l2_rect *
vsp1_entity_get_pad_selection(struct vsp1_entity *entity,
			      struct v4l2_subdev_state *sd_state,
			      unsigned int pad, unsigned int target)
{
	switch (target) {
	case V4L2_SEL_TGT_COMPOSE:
		return v4l2_subdev_get_try_compose(&entity->subdev, sd_state,
						   pad);
	case V4L2_SEL_TGT_CROP:
		return v4l2_subdev_get_try_crop(&entity->subdev, sd_state,
						pad);
	default:
		return NULL;
	}
}

/*
 * vsp1_entity_init_cfg - Initialize formats on all pads
 * @subdev: V4L2 subdevice
 * @cfg: V4L2 subdev pad configuration
 *
 * Initialize all pad formats with default values in the given pad config. This
 * function can be used as a handler for the subdev pad::init_cfg operation.
 */
int vsp1_entity_init_cfg(struct v4l2_subdev *subdev,
			 struct v4l2_subdev_state *sd_state)
{
	unsigned int pad;

	for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) {
		struct v4l2_subdev_format format = {
			.pad = pad,
			.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY
			       : V4L2_SUBDEV_FORMAT_ACTIVE,
		};

		v4l2_subdev_call(subdev, pad, set_fmt, sd_state, &format);
	}

	return 0;
}

/*
 * vsp1_subdev_get_pad_format - Subdev pad get_fmt handler
 * @subdev: V4L2 subdevice
 * @cfg: V4L2 subdev pad configuration
 * @fmt: V4L2 subdev format
 *
 * This function implements the subdev get_fmt pad operation. It can be used as
 * a direct drop-in for the operation handler.
 */
int vsp1_subdev_get_pad_format(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_state *sd_state,
			       struct v4l2_subdev_format *fmt)
{
	struct vsp1_entity *entity = to_vsp1_entity(subdev);
	struct v4l2_subdev_state *config;

	config = vsp1_entity_get_pad_config(entity, sd_state, fmt->which);
	if (!config)
		return -EINVAL;

	mutex_lock(&entity->lock);
	fmt->format = *vsp1_entity_get_pad_format(entity, config, fmt->pad);
	mutex_unlock(&entity->lock);

	return 0;
}

/*
 * vsp1_subdev_enum_mbus_code - Subdev pad enum_mbus_code handler
 * @subdev: V4L2 subdevice
 * @cfg: V4L2 subdev pad configuration
 * @code: Media bus code enumeration
 * @codes: Array of supported media bus codes
 * @ncodes: Number of supported media bus codes
 *
 * This function implements the subdev enum_mbus_code pad operation for entities
 * that do not support format conversion. It enumerates the given supported
 * media bus codes on the sink pad and reports a source pad format identical to
 * the sink pad.
 */
int vsp1_subdev_enum_mbus_code(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_state *sd_state,
			       struct v4l2_subdev_mbus_code_enum *code,
			       const unsigned int *codes, unsigned int ncodes)
{
	struct vsp1_entity *entity = to_vsp1_entity(subdev);

	if (code->pad == 0) {
		if (code->index >= ncodes)
			return -EINVAL;

		code->code = codes[code->index];
	} else {
		struct v4l2_subdev_state *config;
		struct v4l2_mbus_framefmt *format;

		/*
		 * The entity can't perform format conversion, the sink format
		 * is always identical to the source format.
		 */
		if (code->index)
			return -EINVAL;

		config = vsp1_entity_get_pad_config(entity, sd_state,
						    code->which);
		if (!config)
			return -EINVAL;

		mutex_lock(&entity->lock);
		format = vsp1_entity_get_pad_format(entity, config, 0);
		code->code = format->code;
		mutex_unlock(&entity->lock);
	}

	return 0;
}

/*
 * vsp1_subdev_enum_frame_size - Subdev pad enum_frame_size handler
 * @subdev: V4L2 subdevice
 * @cfg: V4L2 subdev pad configuration
 * @fse: Frame size enumeration
 * @min_width: Minimum image width
 * @min_height: Minimum image height
 * @max_width: Maximum image width
 * @max_height: Maximum image height
 *
 * This function implements the subdev enum_frame_size pad operation for
 * entities that do not support scaling or cropping. It reports the given
 * minimum and maximum frame width and height on the sink pad, and a fixed
 * source pad size identical to the sink pad.
 */
int vsp1_subdev_enum_frame_size(struct v4l2_subdev *subdev,
				struct v4l2_subdev_state *sd_state,
				struct v4l2_subdev_frame_size_enum *fse,
				unsigned int min_width, unsigned int min_height,
				unsigned int max_width, unsigned int max_height)
{
	struct vsp1_entity *entity = to_vsp1_entity(subdev);
	struct v4l2_subdev_state *config;
	struct v4l2_mbus_framefmt *format;
	int ret = 0;

	config = vsp1_entity_get_pad_config(entity, sd_state, fse->which);
	if (!config)
		return -EINVAL;

	format = vsp1_entity_get_pad_format(entity, config, fse->pad);

	mutex_lock(&entity->lock);

	if (fse->index || fse->code != format->code) {
		ret = -EINVAL;
		goto done;
	}

	if (fse->pad == 0) {
		fse->min_width = min_width;
		fse->max_width = max_width;
		fse->min_height = min_height;
		fse->max_height = max_height;
	} else {
		/*
		 * The size on the source pad are fixed and always identical to
		 * the size on the sink pad.
		 */
		fse->min_width = format->width;
		fse->max_width = format->width;
		fse->min_height = format->height;
		fse->max_height = format->height;
	}

done:
	mutex_unlock(&entity->lock);
	return ret;
}

/*
 * vsp1_subdev_set_pad_format - Subdev pad set_fmt handler
 * @subdev: V4L2 subdevice
 * @cfg: V4L2 subdev pad configuration
 * @fmt: V4L2 subdev format
 * @codes: Array of supported media bus codes
 * @ncodes: Number of supported media bus codes
 * @min_width: Minimum image width
 * @min_height: Minimum image height
 * @max_width: Maximum image width
 * @max_height: Maximum image height
 *
 * This function implements the subdev set_fmt pad operation for entities that
 * do not support scaling or cropping. It defaults to the first supplied media
 * bus code if the requested code isn't supported, clamps the size to the
 * supplied minimum and maximum, and propagates the sink pad format to the
 * source pad.
 */
int vsp1_subdev_set_pad_format(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_state *sd_state,
			       struct v4l2_subdev_format *fmt,
			       const unsigned int *codes, unsigned int ncodes,
			       unsigned int min_width, unsigned int min_height,
			       unsigned int max_width, unsigned int max_height)
{
	struct vsp1_entity *entity = to_vsp1_entity(subdev);
	struct v4l2_subdev_state *config;
	struct v4l2_mbus_framefmt *format;
	struct v4l2_rect *selection;
	unsigned int i;
	int ret = 0;

	mutex_lock(&entity->lock);

	config = vsp1_entity_get_pad_config(entity, sd_state, fmt->which);
	if (!config) {
		ret = -EINVAL;
		goto done;
	}

	format = vsp1_entity_get_pad_format(entity, config, fmt->pad);

	if (fmt->pad == entity->source_pad) {
		/* The output format can't be modified. */
		fmt->format = *format;
		goto done;
	}

	/*
	 * Default to the first media bus code if the requested format is not
	 * supported.
	 */
	for (i = 0; i < ncodes; ++i) {
		if (fmt->format.code == codes[i])
			break;
	}

	format->code = i < ncodes ? codes[i] : codes[0];
	format->width = clamp_t(unsigned int, fmt->format.width,
				min_width, max_width);
	format->height = clamp_t(unsigned int, fmt->format.height,
				 min_height, max_height);
	format->field = V4L2_FIELD_NONE;
	format->colorspace = V4L2_COLORSPACE_SRGB;

	fmt->format = *format;

	/* Propagate the format to the source pad. */
	format = vsp1_entity_get_pad_format(entity, config, entity->source_pad);
	*format = fmt->format;

	/* Reset the crop and compose rectangles. */
	selection = vsp1_entity_get_pad_selection(entity, config, fmt->pad,
						  V4L2_SEL_TGT_CROP);
	selection->left = 0;
	selection->top = 0;
	selection->width = format->width;
	selection->height = format->height;

	selection = vsp1_entity_get_pad_selection(entity, config, fmt->pad,
						  V4L2_SEL_TGT_COMPOSE);
	selection->left = 0;
	selection->top = 0;
	selection->width = format->width;
	selection->height = format->height;

done:
	mutex_unlock(&entity->lock);
	return ret;
}

/* -----------------------------------------------------------------------------
 * Media Operations
 */

static inline struct vsp1_entity *
media_entity_to_vsp1_entity(struct media_entity *entity)
{
	return container_of(entity, struct vsp1_entity, subdev.entity);
}

static int vsp1_entity_link_setup_source(const struct media_pad *source_pad,
					 const struct media_pad *sink_pad,
					 u32 flags)
{
	struct vsp1_entity *source;

	source = media_entity_to_vsp1_entity(source_pad->entity);

	if (!source->route)
		return 0;

	if (flags & MEDIA_LNK_FL_ENABLED) {
		struct vsp1_entity *sink
			= media_entity_to_vsp1_entity(sink_pad->entity);

		/*
		 * Fan-out is limited to one for the normal data path plus
		 * optional HGO and HGT. We ignore the HGO and HGT here.
		 */
		if (sink->type != VSP1_ENTITY_HGO &&
		    sink->type != VSP1_ENTITY_HGT) {
			if (source->sink)
				return -EBUSY;
			source->sink = sink;
			source->sink_pad = sink_pad->index;
		}
	} else {
		source->sink = NULL;
		source->sink_pad = 0;
	}

	return 0;
}

static int vsp1_entity_link_setup_sink(const struct media_pad *source_pad,
				       const struct media_pad *sink_pad,
				       u32 flags)
{
	struct vsp1_entity *sink;
	struct vsp1_entity *source;

	sink = media_entity_to_vsp1_entity(sink_pad->entity);
	source = media_entity_to_vsp1_entity(source_pad->entity);

	if (flags & MEDIA_LNK_FL_ENABLED) {
		/* Fan-in is limited to one. */
		if (sink->sources[sink_pad->index])
			return -EBUSY;

		sink->sources[sink_pad->index] = source;
	} else {
		sink->sources[sink_pad->index] = NULL;
	}

	return 0;
}

int vsp1_entity_link_setup(struct media_entity *entity,
			   const struct media_pad *local,
			   const struct media_pad *remote, u32 flags)
{
	if (local->flags & MEDIA_PAD_FL_SOURCE)
		return vsp1_entity_link_setup_source(local, remote, flags);
	else
		return vsp1_entity_link_setup_sink(remote, local, flags);
}

/**
 * vsp1_entity_remote_pad - Find the pad at the remote end of a link
 * @pad: Pad at the local end of the link
 *
 * Search for a remote pad connected to the given pad by iterating over all
 * links originating or terminating at that pad until an enabled link is found.
 *
 * Our link setup implementation guarantees that the output fan-out will not be
 * higher than one for the data pipelines, except for the links to the HGO and
 * HGT that can be enabled in addition to a regular data link. When traversing
 * outgoing links this function ignores HGO and HGT entities and should thus be
 * used in place of the generic media_pad_remote_pad_first() function to
 * traverse data pipelines.
 *
 * Return a pointer to the pad at the remote end of the first found enabled
 * link, or NULL if no enabled link has been found.
 */
struct media_pad *vsp1_entity_remote_pad(struct media_pad *pad)
{
	struct media_link *link;

	list_for_each_entry(link, &pad->entity->links, list) {
		struct vsp1_entity *entity;

		if (!(link->flags & MEDIA_LNK_FL_ENABLED))
			continue;

		/* If we're the sink the source will never be an HGO or HGT. */
		if (link->sink == pad)
			return link->source;

		if (link->source != pad)
			continue;

		/* If the sink isn't a subdevice it can't be an HGO or HGT. */
		if (!is_media_entity_v4l2_subdev(link->sink->entity))
			return link->sink;

		entity = media_entity_to_vsp1_entity(link->sink->entity);
		if (entity->type != VSP1_ENTITY_HGO &&
		    entity->type != VSP1_ENTITY_HGT)
			return link->sink;
	}

	return NULL;

}

/* -----------------------------------------------------------------------------
 * Initialization
 */

#define VSP1_ENTITY_ROUTE(ent)						\
	{ VSP1_ENTITY_##ent, 0, VI6_DPR_##ent##_ROUTE,			\
	  { VI6_DPR_NODE_##ent }, VI6_DPR_NODE_##ent }

#define VSP1_ENTITY_ROUTE_RPF(idx)					\
	{ VSP1_ENTITY_RPF, idx, VI6_DPR_RPF_ROUTE(idx),			\
	  { 0, }, VI6_DPR_NODE_RPF(idx) }

#define VSP1_ENTITY_ROUTE_UDS(idx)					\
	{ VSP1_ENTITY_UDS, idx, VI6_DPR_UDS_ROUTE(idx),			\
	  { VI6_DPR_NODE_UDS(idx) }, VI6_DPR_NODE_UDS(idx) }

#define VSP1_ENTITY_ROUTE_UIF(idx)					\
	{ VSP1_ENTITY_UIF, idx, VI6_DPR_UIF_ROUTE(idx),			\
	  { VI6_DPR_NODE_UIF(idx) }, VI6_DPR_NODE_UIF(idx) }

#define VSP1_ENTITY_ROUTE_WPF(idx)					\
	{ VSP1_ENTITY_WPF, idx, 0,					\
	  { VI6_DPR_NODE_WPF(idx) }, VI6_DPR_NODE_WPF(idx) }

static const struct vsp1_route vsp1_routes[] = {
	{ VSP1_ENTITY_BRS, 0, VI6_DPR_ILV_BRS_ROUTE,
	  { VI6_DPR_NODE_BRS_IN(0), VI6_DPR_NODE_BRS_IN(1) }, 0 },
	{ VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
	  { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
	    VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3),
	    VI6_DPR_NODE_BRU_IN(4) }, VI6_DPR_NODE_BRU_OUT },
	VSP1_ENTITY_ROUTE(CLU),
	{ VSP1_ENTITY_HGO, 0, 0, { 0, }, 0 },
	{ VSP1_ENTITY_HGT, 0, 0, { 0, }, 0 },
	VSP1_ENTITY_ROUTE(HSI),
	VSP1_ENTITY_ROUTE(HST),
	{ VSP1_ENTITY_LIF, 0, 0, { 0, }, 0 },
	{ VSP1_ENTITY_LIF, 1, 0, { 0, }, 0 },
	VSP1_ENTITY_ROUTE(LUT),
	VSP1_ENTITY_ROUTE_RPF(0),
	VSP1_ENTITY_ROUTE_RPF(1),
	VSP1_ENTITY_ROUTE_RPF(2),
	VSP1_ENTITY_ROUTE_RPF(3),
	VSP1_ENTITY_ROUTE_RPF(4),
	VSP1_ENTITY_ROUTE(SRU),
	VSP1_ENTITY_ROUTE_UDS(0),
	VSP1_ENTITY_ROUTE_UDS(1),
	VSP1_ENTITY_ROUTE_UDS(2),
	VSP1_ENTITY_ROUTE_UIF(0),	/* Named UIF4 in the documentation */
	VSP1_ENTITY_ROUTE_UIF(1),	/* Named UIF5 in the documentation */
	VSP1_ENTITY_ROUTE_WPF(0),
	VSP1_ENTITY_ROUTE_WPF(1),
	VSP1_ENTITY_ROUTE_WPF(2),
	VSP1_ENTITY_ROUTE_WPF(3),
};

int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
		     const char *name, unsigned int num_pads,
		     const struct v4l2_subdev_ops *ops, u32 function)
{
	static struct lock_class_key key;
	struct v4l2_subdev *subdev;
	unsigned int i;
	int ret;

	for (i = 0; i < ARRAY_SIZE(vsp1_routes); ++i) {
		if (vsp1_routes[i].type == entity->type &&
		    vsp1_routes[i].index == entity->index) {
			entity->route = &vsp1_routes[i];
			break;
		}
	}

	if (i == ARRAY_SIZE(vsp1_routes))
		return -EINVAL;

	mutex_init(&entity->lock);

	entity->vsp1 = vsp1;
	entity->source_pad = num_pads - 1;

	/* Allocate and initialize pads. */
	entity->pads = devm_kcalloc(vsp1->dev,
				    num_pads, sizeof(*entity->pads),
				    GFP_KERNEL);
	if (entity->pads == NULL)
		return -ENOMEM;

	for (i = 0; i < num_pads - 1; ++i)
		entity->pads[i].flags = MEDIA_PAD_FL_SINK;

	entity->sources = devm_kcalloc(vsp1->dev, max(num_pads - 1, 1U),
				       sizeof(*entity->sources), GFP_KERNEL);
	if (entity->sources == NULL)
		return -ENOMEM;

	/* Single-pad entities only have a sink. */
	entity->pads[num_pads - 1].flags = num_pads > 1 ? MEDIA_PAD_FL_SOURCE
					 : MEDIA_PAD_FL_SINK;

	/* Initialize the media entity. */
	ret = media_entity_pads_init(&entity->subdev.entity, num_pads,
				     entity->pads);
	if (ret < 0)
		return ret;

	/* Initialize the V4L2 subdev. */
	subdev = &entity->subdev;
	v4l2_subdev_init(subdev, ops);

	subdev->entity.function = function;
	subdev->entity.ops = &vsp1->media_ops;
	subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;

	snprintf(subdev->name, sizeof(subdev->name), "%s %s",
		 dev_name(vsp1->dev), name);

	vsp1_entity_init_cfg(subdev, NULL);

	/*
	 * Allocate the pad configuration to store formats and selection
	 * rectangles.
	 */
	/*
	 * FIXME: Drop this call, drivers are not supposed to use
	 * __v4l2_subdev_state_alloc().
	 */
	entity->config = __v4l2_subdev_state_alloc(&entity->subdev,
						   "vsp1:config->lock", &key);
	if (IS_ERR(entity->config)) {
		media_entity_cleanup(&entity->subdev.entity);
		return PTR_ERR(entity->config);
	}

	return 0;
}

void vsp1_entity_destroy(struct vsp1_entity *entity)
{
	if (entity->ops && entity->ops->destroy)
		entity->ops->destroy(entity);
	if (entity->subdev.ctrl_handler)
		v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
	__v4l2_subdev_state_free(entity->config);
	media_entity_cleanup(&entity->subdev.entity);
}