1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * vsp1_entity.c -- R-Car VSP1 Base Entity
4 *
5 * Copyright (C) 2013-2014 Renesas Electronics Corporation
6 *
7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 */
9
10 #include <linux/cleanup.h>
11 #include <linux/device.h>
12 #include <linux/gfp.h>
13 #include <linux/mutex.h>
14
15 #include <media/media-entity.h>
16 #include <media/v4l2-ctrls.h>
17 #include <media/v4l2-event.h>
18 #include <media/v4l2-subdev.h>
19
20 #include "vsp1.h"
21 #include "vsp1_dl.h"
22 #include "vsp1_entity.h"
23 #include "vsp1_pipe.h"
24 #include "vsp1_rwpf.h"
25
vsp1_entity_route_setup(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_dl_body * dlb)26 void vsp1_entity_route_setup(struct vsp1_entity *entity,
27 struct vsp1_pipeline *pipe,
28 struct vsp1_dl_body *dlb)
29 {
30 struct vsp1_entity *source;
31 u32 route;
32
33 if (entity->type == VSP1_ENTITY_HGO) {
34 u32 smppt;
35
36 /*
37 * The HGO is a special case, its routing is configured on the
38 * sink pad.
39 */
40 source = entity->sources[0];
41 smppt = (pipe->output->entity.index << VI6_DPR_SMPPT_TGW_SHIFT)
42 | (source->route->output << VI6_DPR_SMPPT_PT_SHIFT);
43
44 vsp1_dl_body_write(dlb, VI6_DPR_HGO_SMPPT, smppt);
45 return;
46 } else if (entity->type == VSP1_ENTITY_HGT) {
47 u32 smppt;
48
49 /*
50 * The HGT is a special case, its routing is configured on the
51 * sink pad.
52 */
53 source = entity->sources[0];
54 smppt = (pipe->output->entity.index << VI6_DPR_SMPPT_TGW_SHIFT)
55 | (source->route->output << VI6_DPR_SMPPT_PT_SHIFT);
56
57 vsp1_dl_body_write(dlb, VI6_DPR_HGT_SMPPT, smppt);
58 return;
59 }
60
61 source = entity;
62 if (source->route->reg == 0)
63 return;
64
65 route = source->sink->route->inputs[source->sink_pad];
66 /*
67 * The ILV and BRS share the same data path route. The extra BRSSEL bit
68 * selects between the ILV and BRS.
69 *
70 * The BRU and IIF share the same data path route. The extra IIFSEL bit
71 * selects between the IIF and BRU.
72 */
73 if (source->type == VSP1_ENTITY_BRS)
74 route |= VI6_DPR_ROUTE_BRSSEL;
75 else if (source->type == VSP1_ENTITY_IIF)
76 route |= VI6_DPR_ROUTE_IIFSEL;
77 vsp1_dl_body_write(dlb, source->route->reg, route);
78 }
79
vsp1_entity_configure_stream(struct vsp1_entity * entity,struct v4l2_subdev_state * state,struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,struct vsp1_dl_body * dlb)80 void vsp1_entity_configure_stream(struct vsp1_entity *entity,
81 struct v4l2_subdev_state *state,
82 struct vsp1_pipeline *pipe,
83 struct vsp1_dl_list *dl,
84 struct vsp1_dl_body *dlb)
85 {
86 if (entity->ops->configure_stream)
87 entity->ops->configure_stream(entity, state, pipe, dl, dlb);
88 }
89
vsp1_entity_configure_frame(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,struct vsp1_dl_body * dlb)90 void vsp1_entity_configure_frame(struct vsp1_entity *entity,
91 struct vsp1_pipeline *pipe,
92 struct vsp1_dl_list *dl,
93 struct vsp1_dl_body *dlb)
94 {
95 if (entity->ops->configure_frame)
96 entity->ops->configure_frame(entity, pipe, dl, dlb);
97 }
98
vsp1_entity_configure_partition(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,const struct vsp1_partition * partition,struct vsp1_dl_list * dl,struct vsp1_dl_body * dlb)99 void vsp1_entity_configure_partition(struct vsp1_entity *entity,
100 struct vsp1_pipeline *pipe,
101 const struct vsp1_partition *partition,
102 struct vsp1_dl_list *dl,
103 struct vsp1_dl_body *dlb)
104 {
105 if (entity->ops->configure_partition)
106 entity->ops->configure_partition(entity, pipe, partition,
107 dl, dlb);
108 }
109
vsp1_entity_adjust_color_space(struct v4l2_mbus_framefmt * format)110 void vsp1_entity_adjust_color_space(struct v4l2_mbus_framefmt *format)
111 {
112 u8 xfer_func = format->xfer_func;
113 u8 ycbcr_enc = format->ycbcr_enc;
114 u8 quantization = format->quantization;
115
116 vsp1_adjust_color_space(format->code, &format->colorspace, &xfer_func,
117 &ycbcr_enc, &quantization);
118
119 format->xfer_func = xfer_func;
120 format->ycbcr_enc = ycbcr_enc;
121 format->quantization = quantization;
122 }
123
124 /* -----------------------------------------------------------------------------
125 * V4L2 Subdevice Operations
126 */
127
128 /**
129 * vsp1_entity_get_state - Get the subdev state for an entity
130 * @entity: the entity
131 * @sd_state: the TRY state
132 * @which: state selector (ACTIVE or TRY)
133 *
134 * When called with which set to V4L2_SUBDEV_FORMAT_ACTIVE the caller must hold
135 * the entity lock to access the returned configuration.
136 *
137 * Return the subdev state requested by the which argument. The TRY state is
138 * passed explicitly to the function through the sd_state argument and simply
139 * returned when requested. The ACTIVE state comes from the entity structure.
140 */
141 struct v4l2_subdev_state *
vsp1_entity_get_state(struct vsp1_entity * entity,struct v4l2_subdev_state * sd_state,enum v4l2_subdev_format_whence which)142 vsp1_entity_get_state(struct vsp1_entity *entity,
143 struct v4l2_subdev_state *sd_state,
144 enum v4l2_subdev_format_whence which)
145 {
146 switch (which) {
147 case V4L2_SUBDEV_FORMAT_ACTIVE:
148 return entity->state;
149 case V4L2_SUBDEV_FORMAT_TRY:
150 default:
151 return sd_state;
152 }
153 }
154
155 /*
156 * vsp1_subdev_get_pad_format - Subdev pad get_fmt handler
157 * @subdev: V4L2 subdevice
158 * @sd_state: V4L2 subdev state
159 * @fmt: V4L2 subdev format
160 *
161 * This function implements the subdev get_fmt pad operation. It can be used as
162 * a direct drop-in for the operation handler.
163 */
vsp1_subdev_get_pad_format(struct v4l2_subdev * subdev,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)164 int vsp1_subdev_get_pad_format(struct v4l2_subdev *subdev,
165 struct v4l2_subdev_state *sd_state,
166 struct v4l2_subdev_format *fmt)
167 {
168 struct vsp1_entity *entity = to_vsp1_entity(subdev);
169 struct v4l2_subdev_state *state;
170
171 state = vsp1_entity_get_state(entity, sd_state, fmt->which);
172 if (!state)
173 return -EINVAL;
174
175 mutex_lock(&entity->lock);
176 fmt->format = *v4l2_subdev_state_get_format(state, fmt->pad);
177 mutex_unlock(&entity->lock);
178
179 return 0;
180 }
181
182 /*
183 * vsp1_subdev_enum_mbus_code - Subdev pad enum_mbus_code handler
184 * @subdev: V4L2 subdevice
185 * @sd_state: V4L2 subdev state
186 * @code: Media bus code enumeration
187 *
188 * This function implements the subdev enum_mbus_code pad operation for entities
189 * that do not support format conversion. It enumerates the given supported
190 * media bus codes on the sink pad and reports a source pad format identical to
191 * the sink pad.
192 */
vsp1_subdev_enum_mbus_code(struct v4l2_subdev * subdev,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)193 int vsp1_subdev_enum_mbus_code(struct v4l2_subdev *subdev,
194 struct v4l2_subdev_state *sd_state,
195 struct v4l2_subdev_mbus_code_enum *code)
196 {
197 struct vsp1_entity *entity = to_vsp1_entity(subdev);
198
199 if (code->pad == 0) {
200 if (code->index >= entity->num_codes)
201 return -EINVAL;
202
203 code->code = entity->codes[code->index];
204 } else {
205 struct v4l2_subdev_state *state;
206 struct v4l2_mbus_framefmt *format;
207
208 /*
209 * The entity can't perform format conversion, the sink format
210 * is always identical to the source format.
211 */
212 if (code->index)
213 return -EINVAL;
214
215 state = vsp1_entity_get_state(entity, sd_state, code->which);
216 if (!state)
217 return -EINVAL;
218
219 mutex_lock(&entity->lock);
220 format = v4l2_subdev_state_get_format(state, 0);
221 code->code = format->code;
222 mutex_unlock(&entity->lock);
223 }
224
225 return 0;
226 }
227
228 /*
229 * vsp1_subdev_enum_frame_size - Subdev pad enum_frame_size handler
230 * @subdev: V4L2 subdevice
231 * @sd_state: V4L2 subdev state
232 * @fse: Frame size enumeration
233 *
234 * This function implements the subdev enum_frame_size pad operation for
235 * entities that do not support scaling or cropping. It reports the given
236 * minimum and maximum frame width and height on the sink pad, and a fixed
237 * source pad size identical to the sink pad.
238 */
vsp1_subdev_enum_frame_size(struct v4l2_subdev * subdev,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)239 int vsp1_subdev_enum_frame_size(struct v4l2_subdev *subdev,
240 struct v4l2_subdev_state *sd_state,
241 struct v4l2_subdev_frame_size_enum *fse)
242 {
243 struct vsp1_entity *entity = to_vsp1_entity(subdev);
244
245 if (fse->index)
246 return -EINVAL;
247
248 if (fse->pad == 0) {
249 unsigned int i;
250
251 for (i = 0; i < entity->num_codes; ++i) {
252 if (fse->code == entity->codes[i])
253 break;
254 }
255
256 if (i == entity->num_codes)
257 return -EINVAL;
258
259 fse->min_width = entity->min_width;
260 fse->max_width = entity->max_width;
261 fse->min_height = entity->min_height;
262 fse->max_height = entity->max_height;
263 } else {
264 struct v4l2_subdev_state *state;
265 struct v4l2_mbus_framefmt *format;
266
267 state = vsp1_entity_get_state(entity, sd_state, fse->which);
268 if (!state)
269 return -EINVAL;
270
271 /*
272 * The media bus code and size on the source pad are fixed and
273 * always identical to the sink pad.
274 */
275 format = v4l2_subdev_state_get_format(state, 0);
276
277 guard(mutex)(&entity->lock);
278
279 if (fse->code != format->code)
280 return -EINVAL;
281
282 fse->min_width = format->width;
283 fse->max_width = format->width;
284 fse->min_height = format->height;
285 fse->max_height = format->height;
286 }
287
288 return 0;
289 }
290
291 /*
292 * vsp1_subdev_set_pad_format - Subdev pad set_fmt handler
293 * @subdev: V4L2 subdevice
294 * @sd_state: V4L2 subdev state
295 * @fmt: V4L2 subdev format
296 *
297 * This function implements the subdev set_fmt pad operation for entities that
298 * do not support scaling or cropping. It defaults to the first supported media
299 * bus code if the requested code isn't supported, clamps the size to the
300 * entity's limits, and propagates the sink pad format to the source pad.
301 */
vsp1_subdev_set_pad_format(struct v4l2_subdev * subdev,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)302 int vsp1_subdev_set_pad_format(struct v4l2_subdev *subdev,
303 struct v4l2_subdev_state *sd_state,
304 struct v4l2_subdev_format *fmt)
305 {
306 struct vsp1_entity *entity = to_vsp1_entity(subdev);
307 struct v4l2_subdev_state *state;
308 struct v4l2_mbus_framefmt *format;
309 struct v4l2_rect *selection;
310 unsigned int i;
311 int ret = 0;
312
313 mutex_lock(&entity->lock);
314
315 state = vsp1_entity_get_state(entity, sd_state, fmt->which);
316 if (!state) {
317 ret = -EINVAL;
318 goto done;
319 }
320
321 format = v4l2_subdev_state_get_format(state, fmt->pad);
322
323 if (fmt->pad == entity->source_pad) {
324 /* The output format can't be modified. */
325 fmt->format = *format;
326 goto done;
327 }
328
329 /*
330 * Default to the first media bus code if the requested format is not
331 * supported.
332 */
333 for (i = 0; i < entity->num_codes; ++i) {
334 if (fmt->format.code == entity->codes[i])
335 break;
336 }
337
338 format->code = i < entity->num_codes
339 ? entity->codes[i] : entity->codes[0];
340 format->width = clamp_t(unsigned int, fmt->format.width,
341 entity->min_width, entity->max_width);
342 format->height = clamp_t(unsigned int, fmt->format.height,
343 entity->min_height, entity->max_height);
344 format->field = V4L2_FIELD_NONE;
345
346 format->colorspace = fmt->format.colorspace;
347 format->xfer_func = fmt->format.xfer_func;
348 format->ycbcr_enc = fmt->format.ycbcr_enc;
349 format->quantization = fmt->format.quantization;
350
351 vsp1_entity_adjust_color_space(format);
352
353 fmt->format = *format;
354
355 /* Propagate the format to the source pad. */
356 format = v4l2_subdev_state_get_format(state, entity->source_pad);
357 *format = fmt->format;
358
359 /* Reset the crop and compose rectangles. */
360 selection = v4l2_subdev_state_get_crop(state, fmt->pad);
361 selection->left = 0;
362 selection->top = 0;
363 selection->width = format->width;
364 selection->height = format->height;
365
366 selection = v4l2_subdev_state_get_compose(state, fmt->pad);
367 selection->left = 0;
368 selection->top = 0;
369 selection->width = format->width;
370 selection->height = format->height;
371
372 done:
373 mutex_unlock(&entity->lock);
374 return ret;
375 }
376
vsp1_entity_init_state(struct v4l2_subdev * subdev,struct v4l2_subdev_state * sd_state)377 static int vsp1_entity_init_state(struct v4l2_subdev *subdev,
378 struct v4l2_subdev_state *sd_state)
379 {
380 unsigned int pad;
381
382 /* Initialize all pad formats with default values. */
383 for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) {
384 struct v4l2_subdev_format format = {
385 .pad = pad,
386 .which = sd_state ? V4L2_SUBDEV_FORMAT_TRY
387 : V4L2_SUBDEV_FORMAT_ACTIVE,
388 };
389
390 v4l2_subdev_call(subdev, pad, set_fmt, sd_state, &format);
391 }
392
393 return 0;
394 }
395
396 static const struct v4l2_subdev_internal_ops vsp1_entity_internal_ops = {
397 .init_state = vsp1_entity_init_state,
398 };
399
400 const struct v4l2_subdev_core_ops vsp1_entity_core_ops = {
401 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
402 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
403 };
404
405 /* -----------------------------------------------------------------------------
406 * Media Operations
407 */
408
409 static inline struct vsp1_entity *
media_entity_to_vsp1_entity(struct media_entity * entity)410 media_entity_to_vsp1_entity(struct media_entity *entity)
411 {
412 return container_of(entity, struct vsp1_entity, subdev.entity);
413 }
414
vsp1_entity_link_setup_source(const struct media_pad * source_pad,const struct media_pad * sink_pad,u32 flags)415 static int vsp1_entity_link_setup_source(const struct media_pad *source_pad,
416 const struct media_pad *sink_pad,
417 u32 flags)
418 {
419 struct vsp1_entity *source;
420
421 source = media_entity_to_vsp1_entity(source_pad->entity);
422
423 if (!source->route)
424 return 0;
425
426 if (flags & MEDIA_LNK_FL_ENABLED) {
427 struct vsp1_entity *sink
428 = media_entity_to_vsp1_entity(sink_pad->entity);
429
430 /*
431 * Fan-out is limited to one for the normal data path plus
432 * optional HGO and HGT. We ignore the HGO and HGT here.
433 */
434 if (sink->type != VSP1_ENTITY_HGO &&
435 sink->type != VSP1_ENTITY_HGT) {
436 if (source->sink)
437 return -EBUSY;
438 source->sink = sink;
439 source->sink_pad = sink_pad->index;
440 }
441 } else {
442 source->sink = NULL;
443 source->sink_pad = 0;
444 }
445
446 return 0;
447 }
448
vsp1_entity_link_setup_sink(const struct media_pad * source_pad,const struct media_pad * sink_pad,u32 flags)449 static int vsp1_entity_link_setup_sink(const struct media_pad *source_pad,
450 const struct media_pad *sink_pad,
451 u32 flags)
452 {
453 struct vsp1_entity *sink;
454 struct vsp1_entity *source;
455
456 sink = media_entity_to_vsp1_entity(sink_pad->entity);
457 source = media_entity_to_vsp1_entity(source_pad->entity);
458
459 if (flags & MEDIA_LNK_FL_ENABLED) {
460 /* Fan-in is limited to one. */
461 if (sink->sources[sink_pad->index])
462 return -EBUSY;
463
464 sink->sources[sink_pad->index] = source;
465 } else {
466 sink->sources[sink_pad->index] = NULL;
467 }
468
469 return 0;
470 }
471
vsp1_entity_link_setup(struct media_entity * entity,const struct media_pad * local,const struct media_pad * remote,u32 flags)472 int vsp1_entity_link_setup(struct media_entity *entity,
473 const struct media_pad *local,
474 const struct media_pad *remote, u32 flags)
475 {
476 if (local->flags & MEDIA_PAD_FL_SOURCE)
477 return vsp1_entity_link_setup_source(local, remote, flags);
478 else
479 return vsp1_entity_link_setup_sink(remote, local, flags);
480 }
481
482 /**
483 * vsp1_entity_remote_pad - Find the pad at the remote end of a link
484 * @pad: Pad at the local end of the link
485 *
486 * Search for a remote pad connected to the given pad by iterating over all
487 * links originating or terminating at that pad until an enabled link is found.
488 *
489 * Our link setup implementation guarantees that the output fan-out will not be
490 * higher than one for the data pipelines, except for the links to the HGO and
491 * HGT that can be enabled in addition to a regular data link. When traversing
492 * outgoing links this function ignores HGO and HGT entities and should thus be
493 * used in place of the generic media_pad_remote_pad_first() function to
494 * traverse data pipelines.
495 *
496 * Return a pointer to the pad at the remote end of the first found enabled
497 * link, or NULL if no enabled link has been found.
498 */
vsp1_entity_remote_pad(struct media_pad * pad)499 struct media_pad *vsp1_entity_remote_pad(struct media_pad *pad)
500 {
501 struct media_link *link;
502
503 list_for_each_entry(link, &pad->entity->links, list) {
504 struct vsp1_entity *entity;
505
506 if (!(link->flags & MEDIA_LNK_FL_ENABLED))
507 continue;
508
509 /* If we're the sink the source will never be an HGO or HGT. */
510 if (link->sink == pad)
511 return link->source;
512
513 if (link->source != pad)
514 continue;
515
516 /* If the sink isn't a subdevice it can't be an HGO or HGT. */
517 if (!is_media_entity_v4l2_subdev(link->sink->entity))
518 return link->sink;
519
520 entity = media_entity_to_vsp1_entity(link->sink->entity);
521 if (entity->type != VSP1_ENTITY_HGO &&
522 entity->type != VSP1_ENTITY_HGT)
523 return link->sink;
524 }
525
526 return NULL;
527
528 }
529
530 /* -----------------------------------------------------------------------------
531 * Initialization
532 */
533
534 #define VSP1_ENTITY_ROUTE(ent) \
535 { VSP1_ENTITY_##ent, 0, VI6_DPR_##ent##_ROUTE, \
536 { VI6_DPR_NODE_##ent }, VI6_DPR_NODE_##ent }
537
538 #define VSP1_ENTITY_ROUTE_RPF(idx) \
539 { VSP1_ENTITY_RPF, idx, VI6_DPR_RPF_ROUTE(idx), \
540 { 0, }, VI6_DPR_NODE_RPF(idx) }
541
542 #define VSP1_ENTITY_ROUTE_UDS(idx) \
543 { VSP1_ENTITY_UDS, idx, VI6_DPR_UDS_ROUTE(idx), \
544 { VI6_DPR_NODE_UDS(idx) }, VI6_DPR_NODE_UDS(idx) }
545
546 #define VSP1_ENTITY_ROUTE_UIF(idx) \
547 { VSP1_ENTITY_UIF, idx, VI6_DPR_UIF_ROUTE(idx), \
548 { VI6_DPR_NODE_UIF(idx) }, VI6_DPR_NODE_UIF(idx) }
549
550 #define VSP1_ENTITY_ROUTE_WPF(idx) \
551 { VSP1_ENTITY_WPF, idx, 0, \
552 { VI6_DPR_NODE_WPF(idx) }, VI6_DPR_NODE_WPF(idx) }
553
554 static const struct vsp1_route vsp1_routes[] = {
555 { VSP1_ENTITY_IIF, 0, VI6_DPR_BRU_ROUTE,
556 { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
557 VI6_DPR_NODE_BRU_IN(3) }, VI6_DPR_NODE_WPF(0) },
558 { VSP1_ENTITY_BRS, 0, VI6_DPR_ILV_BRS_ROUTE,
559 { VI6_DPR_NODE_BRS_IN(0), VI6_DPR_NODE_BRS_IN(1) }, 0 },
560 { VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
561 { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
562 VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3),
563 VI6_DPR_NODE_BRU_IN(4) }, VI6_DPR_NODE_BRU_OUT },
564 VSP1_ENTITY_ROUTE(CLU),
565 { VSP1_ENTITY_HGO, 0, 0, { 0, }, 0 },
566 { VSP1_ENTITY_HGT, 0, 0, { 0, }, 0 },
567 VSP1_ENTITY_ROUTE(HSI),
568 VSP1_ENTITY_ROUTE(HST),
569 { VSP1_ENTITY_LIF, 0, 0, { 0, }, 0 },
570 { VSP1_ENTITY_LIF, 1, 0, { 0, }, 0 },
571 VSP1_ENTITY_ROUTE(LUT),
572 VSP1_ENTITY_ROUTE_RPF(0),
573 VSP1_ENTITY_ROUTE_RPF(1),
574 VSP1_ENTITY_ROUTE_RPF(2),
575 VSP1_ENTITY_ROUTE_RPF(3),
576 VSP1_ENTITY_ROUTE_RPF(4),
577 VSP1_ENTITY_ROUTE(SRU),
578 VSP1_ENTITY_ROUTE_UDS(0),
579 VSP1_ENTITY_ROUTE_UDS(1),
580 VSP1_ENTITY_ROUTE_UDS(2),
581 VSP1_ENTITY_ROUTE_UIF(0), /* Named UIF4 in the documentation */
582 VSP1_ENTITY_ROUTE_UIF(1), /* Named UIF5 in the documentation */
583 VSP1_ENTITY_ROUTE_WPF(0),
584 VSP1_ENTITY_ROUTE_WPF(1),
585 VSP1_ENTITY_ROUTE_WPF(2),
586 VSP1_ENTITY_ROUTE_WPF(3),
587 };
588
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)589 int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
590 const char *name, unsigned int num_pads,
591 const struct v4l2_subdev_ops *ops, u32 function)
592 {
593 static struct lock_class_key key;
594 struct v4l2_subdev *subdev;
595 unsigned int i;
596 int ret;
597
598 for (i = 0; i < ARRAY_SIZE(vsp1_routes); ++i) {
599 if (vsp1_routes[i].type == entity->type &&
600 vsp1_routes[i].index == entity->index) {
601 entity->route = &vsp1_routes[i];
602 break;
603 }
604 }
605
606 if (i == ARRAY_SIZE(vsp1_routes))
607 return -EINVAL;
608
609 mutex_init(&entity->lock);
610
611 entity->vsp1 = vsp1;
612 entity->source_pad = num_pads - 1;
613
614 /* Allocate and initialize pads. */
615 entity->pads = devm_kcalloc(vsp1->dev,
616 num_pads, sizeof(*entity->pads),
617 GFP_KERNEL);
618 if (entity->pads == NULL)
619 return -ENOMEM;
620
621 for (i = 0; i < num_pads - 1; ++i)
622 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
623
624 entity->sources = devm_kcalloc(vsp1->dev, max(num_pads - 1, 1U),
625 sizeof(*entity->sources), GFP_KERNEL);
626 if (entity->sources == NULL)
627 return -ENOMEM;
628
629 /* Single-pad entities only have a sink. */
630 entity->pads[num_pads - 1].flags = num_pads > 1 ? MEDIA_PAD_FL_SOURCE
631 : MEDIA_PAD_FL_SINK;
632
633 /* Initialize the media entity. */
634 ret = media_entity_pads_init(&entity->subdev.entity, num_pads,
635 entity->pads);
636 if (ret < 0)
637 return ret;
638
639 /* Initialize the V4L2 subdev. */
640 subdev = &entity->subdev;
641 v4l2_subdev_init(subdev, ops);
642 subdev->internal_ops = &vsp1_entity_internal_ops;
643
644 subdev->entity.function = function;
645 subdev->entity.ops = &vsp1->media_ops;
646 subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
647
648 if (ops->core == &vsp1_entity_core_ops)
649 subdev->flags |= V4L2_SUBDEV_FL_HAS_EVENTS;
650
651 snprintf(subdev->name, sizeof(subdev->name), "%s %s",
652 dev_name(vsp1->dev), name);
653
654 vsp1_entity_init_state(subdev, NULL);
655
656 /*
657 * Allocate the subdev state to store formats and selection
658 * rectangles.
659 */
660 /*
661 * FIXME: Drop this call, drivers are not supposed to use
662 * __v4l2_subdev_state_alloc().
663 */
664 entity->state = __v4l2_subdev_state_alloc(&entity->subdev,
665 "vsp1:state->lock", &key);
666 if (IS_ERR(entity->state)) {
667 media_entity_cleanup(&entity->subdev.entity);
668 return PTR_ERR(entity->state);
669 }
670
671 return 0;
672 }
673
vsp1_entity_destroy(struct vsp1_entity * entity)674 void vsp1_entity_destroy(struct vsp1_entity *entity)
675 {
676 if (entity->ops && entity->ops->destroy)
677 entity->ops->destroy(entity);
678 if (entity->subdev.ctrl_handler)
679 v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
680 __v4l2_subdev_state_free(entity->state);
681 media_entity_cleanup(&entity->subdev.entity);
682 }
683