1 /*
2 * vsp1_video.c -- R-Car VSP1 Video Node
3 *
4 * Copyright (C) 2013-2015 Renesas Electronics Corporation
5 *
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #include <linux/list.h>
15 #include <linux/module.h>
16 #include <linux/mutex.h>
17 #include <linux/slab.h>
18 #include <linux/v4l2-mediabus.h>
19 #include <linux/videodev2.h>
20 #include <linux/wait.h>
21
22 #include <media/media-entity.h>
23 #include <media/v4l2-dev.h>
24 #include <media/v4l2-fh.h>
25 #include <media/v4l2-ioctl.h>
26 #include <media/v4l2-subdev.h>
27 #include <media/videobuf2-v4l2.h>
28 #include <media/videobuf2-dma-contig.h>
29
30 #include "vsp1.h"
31 #include "vsp1_bru.h"
32 #include "vsp1_dl.h"
33 #include "vsp1_entity.h"
34 #include "vsp1_hgo.h"
35 #include "vsp1_hgt.h"
36 #include "vsp1_pipe.h"
37 #include "vsp1_rwpf.h"
38 #include "vsp1_uds.h"
39 #include "vsp1_video.h"
40
41 #define VSP1_VIDEO_DEF_FORMAT V4L2_PIX_FMT_YUYV
42 #define VSP1_VIDEO_DEF_WIDTH 1024
43 #define VSP1_VIDEO_DEF_HEIGHT 768
44
45 #define VSP1_VIDEO_MIN_WIDTH 2U
46 #define VSP1_VIDEO_MAX_WIDTH 8190U
47 #define VSP1_VIDEO_MIN_HEIGHT 2U
48 #define VSP1_VIDEO_MAX_HEIGHT 8190U
49
50 /* -----------------------------------------------------------------------------
51 * Helper functions
52 */
53
54 static struct v4l2_subdev *
vsp1_video_remote_subdev(struct media_pad * local,u32 * pad)55 vsp1_video_remote_subdev(struct media_pad *local, u32 *pad)
56 {
57 struct media_pad *remote;
58
59 remote = media_entity_remote_pad(local);
60 if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
61 return NULL;
62
63 if (pad)
64 *pad = remote->index;
65
66 return media_entity_to_v4l2_subdev(remote->entity);
67 }
68
vsp1_video_verify_format(struct vsp1_video * video)69 static int vsp1_video_verify_format(struct vsp1_video *video)
70 {
71 struct v4l2_subdev_format fmt;
72 struct v4l2_subdev *subdev;
73 int ret;
74
75 subdev = vsp1_video_remote_subdev(&video->pad, &fmt.pad);
76 if (subdev == NULL)
77 return -EINVAL;
78
79 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
80 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
81 if (ret < 0)
82 return ret == -ENOIOCTLCMD ? -EINVAL : ret;
83
84 if (video->rwpf->fmtinfo->mbus != fmt.format.code ||
85 video->rwpf->format.height != fmt.format.height ||
86 video->rwpf->format.width != fmt.format.width)
87 return -EINVAL;
88
89 return 0;
90 }
91
__vsp1_video_try_format(struct vsp1_video * video,struct v4l2_pix_format_mplane * pix,const struct vsp1_format_info ** fmtinfo)92 static int __vsp1_video_try_format(struct vsp1_video *video,
93 struct v4l2_pix_format_mplane *pix,
94 const struct vsp1_format_info **fmtinfo)
95 {
96 static const u32 xrgb_formats[][2] = {
97 { V4L2_PIX_FMT_RGB444, V4L2_PIX_FMT_XRGB444 },
98 { V4L2_PIX_FMT_RGB555, V4L2_PIX_FMT_XRGB555 },
99 { V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_XBGR32 },
100 { V4L2_PIX_FMT_RGB32, V4L2_PIX_FMT_XRGB32 },
101 };
102
103 const struct vsp1_format_info *info;
104 unsigned int width = pix->width;
105 unsigned int height = pix->height;
106 unsigned int i;
107
108 /*
109 * Backward compatibility: replace deprecated RGB formats by their XRGB
110 * equivalent. This selects the format older userspace applications want
111 * while still exposing the new format.
112 */
113 for (i = 0; i < ARRAY_SIZE(xrgb_formats); ++i) {
114 if (xrgb_formats[i][0] == pix->pixelformat) {
115 pix->pixelformat = xrgb_formats[i][1];
116 break;
117 }
118 }
119
120 /*
121 * Retrieve format information and select the default format if the
122 * requested format isn't supported.
123 */
124 info = vsp1_get_format_info(video->vsp1, pix->pixelformat);
125 if (info == NULL)
126 info = vsp1_get_format_info(video->vsp1, VSP1_VIDEO_DEF_FORMAT);
127
128 pix->pixelformat = info->fourcc;
129 pix->colorspace = V4L2_COLORSPACE_SRGB;
130 pix->field = V4L2_FIELD_NONE;
131
132 if (info->fourcc == V4L2_PIX_FMT_HSV24 ||
133 info->fourcc == V4L2_PIX_FMT_HSV32)
134 pix->hsv_enc = V4L2_HSV_ENC_256;
135
136 memset(pix->reserved, 0, sizeof(pix->reserved));
137
138 /* Align the width and height for YUV 4:2:2 and 4:2:0 formats. */
139 width = round_down(width, info->hsub);
140 height = round_down(height, info->vsub);
141
142 /* Clamp the width and height. */
143 pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH);
144 pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT,
145 VSP1_VIDEO_MAX_HEIGHT);
146
147 /*
148 * Compute and clamp the stride and image size. While not documented in
149 * the datasheet, strides not aligned to a multiple of 128 bytes result
150 * in image corruption.
151 */
152 for (i = 0; i < min(info->planes, 2U); ++i) {
153 unsigned int hsub = i > 0 ? info->hsub : 1;
154 unsigned int vsub = i > 0 ? info->vsub : 1;
155 unsigned int align = 128;
156 unsigned int bpl;
157
158 bpl = clamp_t(unsigned int, pix->plane_fmt[i].bytesperline,
159 pix->width / hsub * info->bpp[i] / 8,
160 round_down(65535U, align));
161
162 pix->plane_fmt[i].bytesperline = round_up(bpl, align);
163 pix->plane_fmt[i].sizeimage = pix->plane_fmt[i].bytesperline
164 * pix->height / vsub;
165 }
166
167 if (info->planes == 3) {
168 /* The second and third planes must have the same stride. */
169 pix->plane_fmt[2].bytesperline = pix->plane_fmt[1].bytesperline;
170 pix->plane_fmt[2].sizeimage = pix->plane_fmt[1].sizeimage;
171 }
172
173 pix->num_planes = info->planes;
174
175 if (fmtinfo)
176 *fmtinfo = info;
177
178 return 0;
179 }
180
181 /* -----------------------------------------------------------------------------
182 * VSP1 Partition Algorithm support
183 */
184
185 /**
186 * vsp1_video_calculate_partition - Calculate the active partition output window
187 *
188 * @pipe: the pipeline
189 * @partition: partition that will hold the calculated values
190 * @div_size: pre-determined maximum partition division size
191 * @index: partition index
192 */
vsp1_video_calculate_partition(struct vsp1_pipeline * pipe,struct vsp1_partition * partition,unsigned int div_size,unsigned int index)193 static void vsp1_video_calculate_partition(struct vsp1_pipeline *pipe,
194 struct vsp1_partition *partition,
195 unsigned int div_size,
196 unsigned int index)
197 {
198 const struct v4l2_mbus_framefmt *format;
199 struct vsp1_partition_window window;
200 unsigned int modulus;
201
202 /*
203 * Partitions are computed on the size before rotation, use the format
204 * at the WPF sink.
205 */
206 format = vsp1_entity_get_pad_format(&pipe->output->entity,
207 pipe->output->entity.config,
208 RWPF_PAD_SINK);
209
210 /* A single partition simply processes the output size in full. */
211 if (pipe->partitions <= 1) {
212 window.left = 0;
213 window.width = format->width;
214
215 vsp1_pipeline_propagate_partition(pipe, partition, index,
216 &window);
217 return;
218 }
219
220 /* Initialise the partition with sane starting conditions. */
221 window.left = index * div_size;
222 window.width = div_size;
223
224 modulus = format->width % div_size;
225
226 /*
227 * We need to prevent the last partition from being smaller than the
228 * *minimum* width of the hardware capabilities.
229 *
230 * If the modulus is less than half of the partition size,
231 * the penultimate partition is reduced to half, which is added
232 * to the final partition: |1234|1234|1234|12|341|
233 * to prevents this: |1234|1234|1234|1234|1|.
234 */
235 if (modulus) {
236 /*
237 * pipe->partitions is 1 based, whilst index is a 0 based index.
238 * Normalise this locally.
239 */
240 unsigned int partitions = pipe->partitions - 1;
241
242 if (modulus < div_size / 2) {
243 if (index == partitions - 1) {
244 /* Halve the penultimate partition. */
245 window.width = div_size / 2;
246 } else if (index == partitions) {
247 /* Increase the final partition. */
248 window.width = (div_size / 2) + modulus;
249 window.left -= div_size / 2;
250 }
251 } else if (index == partitions) {
252 window.width = modulus;
253 }
254 }
255
256 vsp1_pipeline_propagate_partition(pipe, partition, index, &window);
257 }
258
vsp1_video_pipeline_setup_partitions(struct vsp1_pipeline * pipe)259 static int vsp1_video_pipeline_setup_partitions(struct vsp1_pipeline *pipe)
260 {
261 struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
262 const struct v4l2_mbus_framefmt *format;
263 struct vsp1_entity *entity;
264 unsigned int div_size;
265 unsigned int i;
266
267 /*
268 * Partitions are computed on the size before rotation, use the format
269 * at the WPF sink.
270 */
271 format = vsp1_entity_get_pad_format(&pipe->output->entity,
272 pipe->output->entity.config,
273 RWPF_PAD_SINK);
274 div_size = format->width;
275
276 /*
277 * Only Gen3 hardware requires image partitioning, Gen2 will operate
278 * with a single partition that covers the whole output.
279 */
280 if (vsp1->info->gen == 3) {
281 list_for_each_entry(entity, &pipe->entities, list_pipe) {
282 unsigned int entity_max;
283
284 if (!entity->ops->max_width)
285 continue;
286
287 entity_max = entity->ops->max_width(entity, pipe);
288 if (entity_max)
289 div_size = min(div_size, entity_max);
290 }
291 }
292
293 pipe->partitions = DIV_ROUND_UP(format->width, div_size);
294 pipe->part_table = kcalloc(pipe->partitions, sizeof(*pipe->part_table),
295 GFP_KERNEL);
296 if (!pipe->part_table)
297 return -ENOMEM;
298
299 for (i = 0; i < pipe->partitions; ++i)
300 vsp1_video_calculate_partition(pipe, &pipe->part_table[i],
301 div_size, i);
302
303 return 0;
304 }
305
306 /* -----------------------------------------------------------------------------
307 * Pipeline Management
308 */
309
310 /*
311 * vsp1_video_complete_buffer - Complete the current buffer
312 * @video: the video node
313 *
314 * This function completes the current buffer by filling its sequence number,
315 * time stamp and payload size, and hands it back to the videobuf core.
316 *
317 * When operating in DU output mode (deep pipeline to the DU through the LIF),
318 * the VSP1 needs to constantly supply frames to the display. In that case, if
319 * no other buffer is queued, reuse the one that has just been processed instead
320 * of handing it back to the videobuf core.
321 *
322 * Return the next queued buffer or NULL if the queue is empty.
323 */
324 static struct vsp1_vb2_buffer *
vsp1_video_complete_buffer(struct vsp1_video * video)325 vsp1_video_complete_buffer(struct vsp1_video *video)
326 {
327 struct vsp1_pipeline *pipe = video->rwpf->pipe;
328 struct vsp1_vb2_buffer *next = NULL;
329 struct vsp1_vb2_buffer *done;
330 unsigned long flags;
331 unsigned int i;
332
333 spin_lock_irqsave(&video->irqlock, flags);
334
335 if (list_empty(&video->irqqueue)) {
336 spin_unlock_irqrestore(&video->irqlock, flags);
337 return NULL;
338 }
339
340 done = list_first_entry(&video->irqqueue,
341 struct vsp1_vb2_buffer, queue);
342
343 /* In DU output mode reuse the buffer if the list is singular. */
344 if (pipe->lif && list_is_singular(&video->irqqueue)) {
345 spin_unlock_irqrestore(&video->irqlock, flags);
346 return done;
347 }
348
349 list_del(&done->queue);
350
351 if (!list_empty(&video->irqqueue))
352 next = list_first_entry(&video->irqqueue,
353 struct vsp1_vb2_buffer, queue);
354
355 spin_unlock_irqrestore(&video->irqlock, flags);
356
357 done->buf.sequence = pipe->sequence;
358 done->buf.vb2_buf.timestamp = ktime_get_ns();
359 for (i = 0; i < done->buf.vb2_buf.num_planes; ++i)
360 vb2_set_plane_payload(&done->buf.vb2_buf, i,
361 vb2_plane_size(&done->buf.vb2_buf, i));
362 vb2_buffer_done(&done->buf.vb2_buf, VB2_BUF_STATE_DONE);
363
364 return next;
365 }
366
vsp1_video_frame_end(struct vsp1_pipeline * pipe,struct vsp1_rwpf * rwpf)367 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
368 struct vsp1_rwpf *rwpf)
369 {
370 struct vsp1_video *video = rwpf->video;
371 struct vsp1_vb2_buffer *buf;
372
373 buf = vsp1_video_complete_buffer(video);
374 if (buf == NULL)
375 return;
376
377 video->rwpf->mem = buf->mem;
378 pipe->buffers_ready |= 1 << video->pipe_index;
379 }
380
vsp1_video_pipeline_run_partition(struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,unsigned int partition)381 static void vsp1_video_pipeline_run_partition(struct vsp1_pipeline *pipe,
382 struct vsp1_dl_list *dl,
383 unsigned int partition)
384 {
385 struct vsp1_entity *entity;
386
387 pipe->partition = &pipe->part_table[partition];
388
389 list_for_each_entry(entity, &pipe->entities, list_pipe) {
390 if (entity->ops->configure)
391 entity->ops->configure(entity, pipe, dl,
392 VSP1_ENTITY_PARAMS_PARTITION);
393 }
394 }
395
vsp1_video_pipeline_run(struct vsp1_pipeline * pipe)396 static void vsp1_video_pipeline_run(struct vsp1_pipeline *pipe)
397 {
398 struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
399 struct vsp1_entity *entity;
400 unsigned int partition;
401
402 if (!pipe->dl)
403 pipe->dl = vsp1_dl_list_get(pipe->output->dlm);
404
405 /*
406 * Start with the runtime parameters as the configure operation can
407 * compute/cache information needed when configuring partitions. This
408 * is the case with flipping in the WPF.
409 */
410 list_for_each_entry(entity, &pipe->entities, list_pipe) {
411 if (entity->ops->configure)
412 entity->ops->configure(entity, pipe, pipe->dl,
413 VSP1_ENTITY_PARAMS_RUNTIME);
414 }
415
416 /* Run the first partition */
417 vsp1_video_pipeline_run_partition(pipe, pipe->dl, 0);
418
419 /* Process consecutive partitions as necessary */
420 for (partition = 1; partition < pipe->partitions; ++partition) {
421 struct vsp1_dl_list *dl;
422
423 dl = vsp1_dl_list_get(pipe->output->dlm);
424
425 /*
426 * An incomplete chain will still function, but output only
427 * the partitions that had a dl available. The frame end
428 * interrupt will be marked on the last dl in the chain.
429 */
430 if (!dl) {
431 dev_err(vsp1->dev, "Failed to obtain a dl list. Frame will be incomplete\n");
432 break;
433 }
434
435 vsp1_video_pipeline_run_partition(pipe, dl, partition);
436 vsp1_dl_list_add_chain(pipe->dl, dl);
437 }
438
439 /* Complete, and commit the head display list. */
440 vsp1_dl_list_commit(pipe->dl);
441 pipe->dl = NULL;
442
443 vsp1_pipeline_run(pipe);
444 }
445
vsp1_video_pipeline_frame_end(struct vsp1_pipeline * pipe,bool completed)446 static void vsp1_video_pipeline_frame_end(struct vsp1_pipeline *pipe,
447 bool completed)
448 {
449 struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
450 enum vsp1_pipeline_state state;
451 unsigned long flags;
452 unsigned int i;
453
454 /* M2M Pipelines should never call here with an incomplete frame. */
455 WARN_ON_ONCE(!completed);
456
457 spin_lock_irqsave(&pipe->irqlock, flags);
458
459 /* Complete buffers on all video nodes. */
460 for (i = 0; i < vsp1->info->rpf_count; ++i) {
461 if (!pipe->inputs[i])
462 continue;
463
464 vsp1_video_frame_end(pipe, pipe->inputs[i]);
465 }
466
467 vsp1_video_frame_end(pipe, pipe->output);
468
469 state = pipe->state;
470 pipe->state = VSP1_PIPELINE_STOPPED;
471
472 /*
473 * If a stop has been requested, mark the pipeline as stopped and
474 * return. Otherwise restart the pipeline if ready.
475 */
476 if (state == VSP1_PIPELINE_STOPPING)
477 wake_up(&pipe->wq);
478 else if (vsp1_pipeline_ready(pipe))
479 vsp1_video_pipeline_run(pipe);
480
481 spin_unlock_irqrestore(&pipe->irqlock, flags);
482 }
483
vsp1_video_pipeline_build_branch(struct vsp1_pipeline * pipe,struct vsp1_rwpf * input,struct vsp1_rwpf * output)484 static int vsp1_video_pipeline_build_branch(struct vsp1_pipeline *pipe,
485 struct vsp1_rwpf *input,
486 struct vsp1_rwpf *output)
487 {
488 struct media_entity_enum ent_enum;
489 struct vsp1_entity *entity;
490 struct media_pad *pad;
491 struct vsp1_bru *bru = NULL;
492 int ret;
493
494 ret = media_entity_enum_init(&ent_enum, &input->entity.vsp1->media_dev);
495 if (ret < 0)
496 return ret;
497
498 /*
499 * The main data path doesn't include the HGO or HGT, use
500 * vsp1_entity_remote_pad() to traverse the graph.
501 */
502
503 pad = vsp1_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
504
505 while (1) {
506 if (pad == NULL) {
507 ret = -EPIPE;
508 goto out;
509 }
510
511 /* We've reached a video node, that shouldn't have happened. */
512 if (!is_media_entity_v4l2_subdev(pad->entity)) {
513 ret = -EPIPE;
514 goto out;
515 }
516
517 entity = to_vsp1_entity(
518 media_entity_to_v4l2_subdev(pad->entity));
519
520 /*
521 * A BRU or BRS is present in the pipeline, store its input pad
522 * number in the input RPF for use when configuring the RPF.
523 */
524 if (entity->type == VSP1_ENTITY_BRU ||
525 entity->type == VSP1_ENTITY_BRS) {
526 /* BRU and BRS can't be chained. */
527 if (bru) {
528 ret = -EPIPE;
529 goto out;
530 }
531
532 bru = to_bru(&entity->subdev);
533 bru->inputs[pad->index].rpf = input;
534 input->bru_input = pad->index;
535 }
536
537 /* We've reached the WPF, we're done. */
538 if (entity->type == VSP1_ENTITY_WPF)
539 break;
540
541 /* Ensure the branch has no loop. */
542 if (media_entity_enum_test_and_set(&ent_enum,
543 &entity->subdev.entity)) {
544 ret = -EPIPE;
545 goto out;
546 }
547
548 /* UDS can't be chained. */
549 if (entity->type == VSP1_ENTITY_UDS) {
550 if (pipe->uds) {
551 ret = -EPIPE;
552 goto out;
553 }
554
555 pipe->uds = entity;
556 pipe->uds_input = bru ? &bru->entity : &input->entity;
557 }
558
559 /* Follow the source link, ignoring any HGO or HGT. */
560 pad = &entity->pads[entity->source_pad];
561 pad = vsp1_entity_remote_pad(pad);
562 }
563
564 /* The last entity must be the output WPF. */
565 if (entity != &output->entity)
566 ret = -EPIPE;
567
568 out:
569 media_entity_enum_cleanup(&ent_enum);
570
571 return ret;
572 }
573
vsp1_video_pipeline_build(struct vsp1_pipeline * pipe,struct vsp1_video * video)574 static int vsp1_video_pipeline_build(struct vsp1_pipeline *pipe,
575 struct vsp1_video *video)
576 {
577 struct media_graph graph;
578 struct media_entity *entity = &video->video.entity;
579 struct media_device *mdev = entity->graph_obj.mdev;
580 unsigned int i;
581 int ret;
582
583 /* Walk the graph to locate the entities and video nodes. */
584 ret = media_graph_walk_init(&graph, mdev);
585 if (ret)
586 return ret;
587
588 media_graph_walk_start(&graph, entity);
589
590 while ((entity = media_graph_walk_next(&graph))) {
591 struct v4l2_subdev *subdev;
592 struct vsp1_rwpf *rwpf;
593 struct vsp1_entity *e;
594
595 if (!is_media_entity_v4l2_subdev(entity))
596 continue;
597
598 subdev = media_entity_to_v4l2_subdev(entity);
599 e = to_vsp1_entity(subdev);
600 list_add_tail(&e->list_pipe, &pipe->entities);
601
602 switch (e->type) {
603 case VSP1_ENTITY_RPF:
604 rwpf = to_rwpf(subdev);
605 pipe->inputs[rwpf->entity.index] = rwpf;
606 rwpf->video->pipe_index = ++pipe->num_inputs;
607 rwpf->pipe = pipe;
608 break;
609
610 case VSP1_ENTITY_WPF:
611 rwpf = to_rwpf(subdev);
612 pipe->output = rwpf;
613 rwpf->video->pipe_index = 0;
614 rwpf->pipe = pipe;
615 break;
616
617 case VSP1_ENTITY_LIF:
618 pipe->lif = e;
619 break;
620
621 case VSP1_ENTITY_BRU:
622 case VSP1_ENTITY_BRS:
623 pipe->bru = e;
624 break;
625
626 case VSP1_ENTITY_HGO:
627 pipe->hgo = e;
628 to_hgo(subdev)->histo.pipe = pipe;
629 break;
630
631 case VSP1_ENTITY_HGT:
632 pipe->hgt = e;
633 to_hgt(subdev)->histo.pipe = pipe;
634 break;
635
636 default:
637 break;
638 }
639 }
640
641 media_graph_walk_cleanup(&graph);
642
643 /* We need one output and at least one input. */
644 if (pipe->num_inputs == 0 || !pipe->output)
645 return -EPIPE;
646
647 /*
648 * Follow links downstream for each input and make sure the graph
649 * contains no loop and that all branches end at the output WPF.
650 */
651 for (i = 0; i < video->vsp1->info->rpf_count; ++i) {
652 if (!pipe->inputs[i])
653 continue;
654
655 ret = vsp1_video_pipeline_build_branch(pipe, pipe->inputs[i],
656 pipe->output);
657 if (ret < 0)
658 return ret;
659 }
660
661 return 0;
662 }
663
vsp1_video_pipeline_init(struct vsp1_pipeline * pipe,struct vsp1_video * video)664 static int vsp1_video_pipeline_init(struct vsp1_pipeline *pipe,
665 struct vsp1_video *video)
666 {
667 vsp1_pipeline_init(pipe);
668
669 pipe->frame_end = vsp1_video_pipeline_frame_end;
670
671 return vsp1_video_pipeline_build(pipe, video);
672 }
673
vsp1_video_pipeline_get(struct vsp1_video * video)674 static struct vsp1_pipeline *vsp1_video_pipeline_get(struct vsp1_video *video)
675 {
676 struct vsp1_pipeline *pipe;
677 int ret;
678
679 /*
680 * Get a pipeline object for the video node. If a pipeline has already
681 * been allocated just increment its reference count and return it.
682 * Otherwise allocate a new pipeline and initialize it, it will be freed
683 * when the last reference is released.
684 */
685 if (!video->rwpf->pipe) {
686 pipe = kzalloc(sizeof(*pipe), GFP_KERNEL);
687 if (!pipe)
688 return ERR_PTR(-ENOMEM);
689
690 ret = vsp1_video_pipeline_init(pipe, video);
691 if (ret < 0) {
692 vsp1_pipeline_reset(pipe);
693 kfree(pipe);
694 return ERR_PTR(ret);
695 }
696 } else {
697 pipe = video->rwpf->pipe;
698 kref_get(&pipe->kref);
699 }
700
701 return pipe;
702 }
703
vsp1_video_pipeline_release(struct kref * kref)704 static void vsp1_video_pipeline_release(struct kref *kref)
705 {
706 struct vsp1_pipeline *pipe = container_of(kref, typeof(*pipe), kref);
707
708 vsp1_pipeline_reset(pipe);
709 kfree(pipe);
710 }
711
vsp1_video_pipeline_put(struct vsp1_pipeline * pipe)712 static void vsp1_video_pipeline_put(struct vsp1_pipeline *pipe)
713 {
714 struct media_device *mdev = &pipe->output->entity.vsp1->media_dev;
715
716 mutex_lock(&mdev->graph_mutex);
717 kref_put(&pipe->kref, vsp1_video_pipeline_release);
718 mutex_unlock(&mdev->graph_mutex);
719 }
720
721 /* -----------------------------------------------------------------------------
722 * videobuf2 Queue Operations
723 */
724
725 static int
vsp1_video_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])726 vsp1_video_queue_setup(struct vb2_queue *vq,
727 unsigned int *nbuffers, unsigned int *nplanes,
728 unsigned int sizes[], struct device *alloc_devs[])
729 {
730 struct vsp1_video *video = vb2_get_drv_priv(vq);
731 const struct v4l2_pix_format_mplane *format = &video->rwpf->format;
732 unsigned int i;
733
734 if (*nplanes) {
735 if (*nplanes != format->num_planes)
736 return -EINVAL;
737
738 for (i = 0; i < *nplanes; i++)
739 if (sizes[i] < format->plane_fmt[i].sizeimage)
740 return -EINVAL;
741 return 0;
742 }
743
744 *nplanes = format->num_planes;
745
746 for (i = 0; i < format->num_planes; ++i)
747 sizes[i] = format->plane_fmt[i].sizeimage;
748
749 return 0;
750 }
751
vsp1_video_buffer_prepare(struct vb2_buffer * vb)752 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
753 {
754 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
755 struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
756 struct vsp1_vb2_buffer *buf = to_vsp1_vb2_buffer(vbuf);
757 const struct v4l2_pix_format_mplane *format = &video->rwpf->format;
758 unsigned int i;
759
760 if (vb->num_planes < format->num_planes)
761 return -EINVAL;
762
763 for (i = 0; i < vb->num_planes; ++i) {
764 buf->mem.addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
765
766 if (vb2_plane_size(vb, i) < format->plane_fmt[i].sizeimage)
767 return -EINVAL;
768 }
769
770 for ( ; i < 3; ++i)
771 buf->mem.addr[i] = 0;
772
773 return 0;
774 }
775
vsp1_video_buffer_queue(struct vb2_buffer * vb)776 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
777 {
778 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
779 struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
780 struct vsp1_pipeline *pipe = video->rwpf->pipe;
781 struct vsp1_vb2_buffer *buf = to_vsp1_vb2_buffer(vbuf);
782 unsigned long flags;
783 bool empty;
784
785 spin_lock_irqsave(&video->irqlock, flags);
786 empty = list_empty(&video->irqqueue);
787 list_add_tail(&buf->queue, &video->irqqueue);
788 spin_unlock_irqrestore(&video->irqlock, flags);
789
790 if (!empty)
791 return;
792
793 spin_lock_irqsave(&pipe->irqlock, flags);
794
795 video->rwpf->mem = buf->mem;
796 pipe->buffers_ready |= 1 << video->pipe_index;
797
798 if (vb2_is_streaming(&video->queue) &&
799 vsp1_pipeline_ready(pipe))
800 vsp1_video_pipeline_run(pipe);
801
802 spin_unlock_irqrestore(&pipe->irqlock, flags);
803 }
804
vsp1_video_setup_pipeline(struct vsp1_pipeline * pipe)805 static int vsp1_video_setup_pipeline(struct vsp1_pipeline *pipe)
806 {
807 struct vsp1_entity *entity;
808 int ret;
809
810 /* Determine this pipelines sizes for image partitioning support. */
811 ret = vsp1_video_pipeline_setup_partitions(pipe);
812 if (ret < 0)
813 return ret;
814
815 /* Prepare the display list. */
816 pipe->dl = vsp1_dl_list_get(pipe->output->dlm);
817 if (!pipe->dl)
818 return -ENOMEM;
819
820 if (pipe->uds) {
821 struct vsp1_uds *uds = to_uds(&pipe->uds->subdev);
822
823 /*
824 * If a BRU or BRS is present in the pipeline before the UDS,
825 * the alpha component doesn't need to be scaled as the BRU and
826 * BRS output alpha value is fixed to 255. Otherwise we need to
827 * scale the alpha component only when available at the input
828 * RPF.
829 */
830 if (pipe->uds_input->type == VSP1_ENTITY_BRU ||
831 pipe->uds_input->type == VSP1_ENTITY_BRS) {
832 uds->scale_alpha = false;
833 } else {
834 struct vsp1_rwpf *rpf =
835 to_rwpf(&pipe->uds_input->subdev);
836
837 uds->scale_alpha = rpf->fmtinfo->alpha;
838 }
839 }
840
841 list_for_each_entry(entity, &pipe->entities, list_pipe) {
842 vsp1_entity_route_setup(entity, pipe, pipe->dl);
843
844 if (entity->ops->configure)
845 entity->ops->configure(entity, pipe, pipe->dl,
846 VSP1_ENTITY_PARAMS_INIT);
847 }
848
849 return 0;
850 }
851
vsp1_video_release_buffers(struct vsp1_video * video)852 static void vsp1_video_release_buffers(struct vsp1_video *video)
853 {
854 struct vsp1_vb2_buffer *buffer;
855 unsigned long flags;
856
857 /* Remove all buffers from the IRQ queue. */
858 spin_lock_irqsave(&video->irqlock, flags);
859 list_for_each_entry(buffer, &video->irqqueue, queue)
860 vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR);
861 INIT_LIST_HEAD(&video->irqqueue);
862 spin_unlock_irqrestore(&video->irqlock, flags);
863 }
864
vsp1_video_cleanup_pipeline(struct vsp1_pipeline * pipe)865 static void vsp1_video_cleanup_pipeline(struct vsp1_pipeline *pipe)
866 {
867 lockdep_assert_held(&pipe->lock);
868
869 /* Release our partition table allocation */
870 kfree(pipe->part_table);
871 pipe->part_table = NULL;
872
873 vsp1_dl_list_put(pipe->dl);
874 pipe->dl = NULL;
875 }
876
vsp1_video_start_streaming(struct vb2_queue * vq,unsigned int count)877 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
878 {
879 struct vsp1_video *video = vb2_get_drv_priv(vq);
880 struct vsp1_pipeline *pipe = video->rwpf->pipe;
881 bool start_pipeline = false;
882 unsigned long flags;
883 int ret;
884
885 mutex_lock(&pipe->lock);
886 if (pipe->stream_count == pipe->num_inputs) {
887 ret = vsp1_video_setup_pipeline(pipe);
888 if (ret < 0) {
889 vsp1_video_release_buffers(video);
890 vsp1_video_cleanup_pipeline(pipe);
891 mutex_unlock(&pipe->lock);
892 return ret;
893 }
894
895 start_pipeline = true;
896 }
897
898 pipe->stream_count++;
899 mutex_unlock(&pipe->lock);
900
901 /*
902 * vsp1_pipeline_ready() is not sufficient to establish that all streams
903 * are prepared and the pipeline is configured, as multiple streams
904 * can race through streamon with buffers already queued; Therefore we
905 * don't even attempt to start the pipeline until the last stream has
906 * called through here.
907 */
908 if (!start_pipeline)
909 return 0;
910
911 spin_lock_irqsave(&pipe->irqlock, flags);
912 if (vsp1_pipeline_ready(pipe))
913 vsp1_video_pipeline_run(pipe);
914 spin_unlock_irqrestore(&pipe->irqlock, flags);
915
916 return 0;
917 }
918
vsp1_video_stop_streaming(struct vb2_queue * vq)919 static void vsp1_video_stop_streaming(struct vb2_queue *vq)
920 {
921 struct vsp1_video *video = vb2_get_drv_priv(vq);
922 struct vsp1_pipeline *pipe = video->rwpf->pipe;
923 unsigned long flags;
924 int ret;
925
926 /*
927 * Clear the buffers ready flag to make sure the device won't be started
928 * by a QBUF on the video node on the other side of the pipeline.
929 */
930 spin_lock_irqsave(&video->irqlock, flags);
931 pipe->buffers_ready &= ~(1 << video->pipe_index);
932 spin_unlock_irqrestore(&video->irqlock, flags);
933
934 mutex_lock(&pipe->lock);
935 if (--pipe->stream_count == pipe->num_inputs) {
936 /* Stop the pipeline. */
937 ret = vsp1_pipeline_stop(pipe);
938 if (ret == -ETIMEDOUT)
939 dev_err(video->vsp1->dev, "pipeline stop timeout\n");
940
941 vsp1_video_cleanup_pipeline(pipe);
942 }
943 mutex_unlock(&pipe->lock);
944
945 media_pipeline_stop(&video->video.entity);
946 vsp1_video_release_buffers(video);
947 vsp1_video_pipeline_put(pipe);
948 }
949
950 static const struct vb2_ops vsp1_video_queue_qops = {
951 .queue_setup = vsp1_video_queue_setup,
952 .buf_prepare = vsp1_video_buffer_prepare,
953 .buf_queue = vsp1_video_buffer_queue,
954 .wait_prepare = vb2_ops_wait_prepare,
955 .wait_finish = vb2_ops_wait_finish,
956 .start_streaming = vsp1_video_start_streaming,
957 .stop_streaming = vsp1_video_stop_streaming,
958 };
959
960 /* -----------------------------------------------------------------------------
961 * V4L2 ioctls
962 */
963
964 static int
vsp1_video_querycap(struct file * file,void * fh,struct v4l2_capability * cap)965 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
966 {
967 struct v4l2_fh *vfh = file->private_data;
968 struct vsp1_video *video = to_vsp1_video(vfh->vdev);
969
970 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
971 | V4L2_CAP_VIDEO_CAPTURE_MPLANE
972 | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
973
974 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
975 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
976 | V4L2_CAP_STREAMING;
977 else
978 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
979 | V4L2_CAP_STREAMING;
980
981 strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
982 strlcpy(cap->card, video->video.name, sizeof(cap->card));
983 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
984 dev_name(video->vsp1->dev));
985
986 return 0;
987 }
988
989 static int
vsp1_video_get_format(struct file * file,void * fh,struct v4l2_format * format)990 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
991 {
992 struct v4l2_fh *vfh = file->private_data;
993 struct vsp1_video *video = to_vsp1_video(vfh->vdev);
994
995 if (format->type != video->queue.type)
996 return -EINVAL;
997
998 mutex_lock(&video->lock);
999 format->fmt.pix_mp = video->rwpf->format;
1000 mutex_unlock(&video->lock);
1001
1002 return 0;
1003 }
1004
1005 static int
vsp1_video_try_format(struct file * file,void * fh,struct v4l2_format * format)1006 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
1007 {
1008 struct v4l2_fh *vfh = file->private_data;
1009 struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1010
1011 if (format->type != video->queue.type)
1012 return -EINVAL;
1013
1014 return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
1015 }
1016
1017 static int
vsp1_video_set_format(struct file * file,void * fh,struct v4l2_format * format)1018 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
1019 {
1020 struct v4l2_fh *vfh = file->private_data;
1021 struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1022 const struct vsp1_format_info *info;
1023 int ret;
1024
1025 if (format->type != video->queue.type)
1026 return -EINVAL;
1027
1028 ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
1029 if (ret < 0)
1030 return ret;
1031
1032 mutex_lock(&video->lock);
1033
1034 if (vb2_is_busy(&video->queue)) {
1035 ret = -EBUSY;
1036 goto done;
1037 }
1038
1039 video->rwpf->format = format->fmt.pix_mp;
1040 video->rwpf->fmtinfo = info;
1041
1042 done:
1043 mutex_unlock(&video->lock);
1044 return ret;
1045 }
1046
1047 static int
vsp1_video_streamon(struct file * file,void * fh,enum v4l2_buf_type type)1048 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1049 {
1050 struct v4l2_fh *vfh = file->private_data;
1051 struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1052 struct media_device *mdev = &video->vsp1->media_dev;
1053 struct vsp1_pipeline *pipe;
1054 int ret;
1055
1056 if (video->queue.owner && video->queue.owner != file->private_data)
1057 return -EBUSY;
1058
1059 /*
1060 * Get a pipeline for the video node and start streaming on it. No link
1061 * touching an entity in the pipeline can be activated or deactivated
1062 * once streaming is started.
1063 */
1064 mutex_lock(&mdev->graph_mutex);
1065
1066 pipe = vsp1_video_pipeline_get(video);
1067 if (IS_ERR(pipe)) {
1068 mutex_unlock(&mdev->graph_mutex);
1069 return PTR_ERR(pipe);
1070 }
1071
1072 ret = __media_pipeline_start(&video->video.entity, &pipe->pipe);
1073 if (ret < 0) {
1074 mutex_unlock(&mdev->graph_mutex);
1075 goto err_pipe;
1076 }
1077
1078 mutex_unlock(&mdev->graph_mutex);
1079
1080 /*
1081 * Verify that the configured format matches the output of the connected
1082 * subdev.
1083 */
1084 ret = vsp1_video_verify_format(video);
1085 if (ret < 0)
1086 goto err_stop;
1087
1088 /* Start the queue. */
1089 ret = vb2_streamon(&video->queue, type);
1090 if (ret < 0)
1091 goto err_stop;
1092
1093 return 0;
1094
1095 err_stop:
1096 media_pipeline_stop(&video->video.entity);
1097 err_pipe:
1098 vsp1_video_pipeline_put(pipe);
1099 return ret;
1100 }
1101
1102 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
1103 .vidioc_querycap = vsp1_video_querycap,
1104 .vidioc_g_fmt_vid_cap_mplane = vsp1_video_get_format,
1105 .vidioc_s_fmt_vid_cap_mplane = vsp1_video_set_format,
1106 .vidioc_try_fmt_vid_cap_mplane = vsp1_video_try_format,
1107 .vidioc_g_fmt_vid_out_mplane = vsp1_video_get_format,
1108 .vidioc_s_fmt_vid_out_mplane = vsp1_video_set_format,
1109 .vidioc_try_fmt_vid_out_mplane = vsp1_video_try_format,
1110 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1111 .vidioc_querybuf = vb2_ioctl_querybuf,
1112 .vidioc_qbuf = vb2_ioctl_qbuf,
1113 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1114 .vidioc_expbuf = vb2_ioctl_expbuf,
1115 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1116 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1117 .vidioc_streamon = vsp1_video_streamon,
1118 .vidioc_streamoff = vb2_ioctl_streamoff,
1119 };
1120
1121 /* -----------------------------------------------------------------------------
1122 * V4L2 File Operations
1123 */
1124
vsp1_video_open(struct file * file)1125 static int vsp1_video_open(struct file *file)
1126 {
1127 struct vsp1_video *video = video_drvdata(file);
1128 struct v4l2_fh *vfh;
1129 int ret = 0;
1130
1131 vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
1132 if (vfh == NULL)
1133 return -ENOMEM;
1134
1135 v4l2_fh_init(vfh, &video->video);
1136 v4l2_fh_add(vfh);
1137
1138 file->private_data = vfh;
1139
1140 ret = vsp1_device_get(video->vsp1);
1141 if (ret < 0) {
1142 v4l2_fh_del(vfh);
1143 v4l2_fh_exit(vfh);
1144 kfree(vfh);
1145 }
1146
1147 return ret;
1148 }
1149
vsp1_video_release(struct file * file)1150 static int vsp1_video_release(struct file *file)
1151 {
1152 struct vsp1_video *video = video_drvdata(file);
1153 struct v4l2_fh *vfh = file->private_data;
1154
1155 mutex_lock(&video->lock);
1156 if (video->queue.owner == vfh) {
1157 vb2_queue_release(&video->queue);
1158 video->queue.owner = NULL;
1159 }
1160 mutex_unlock(&video->lock);
1161
1162 vsp1_device_put(video->vsp1);
1163
1164 v4l2_fh_release(file);
1165
1166 file->private_data = NULL;
1167
1168 return 0;
1169 }
1170
1171 static const struct v4l2_file_operations vsp1_video_fops = {
1172 .owner = THIS_MODULE,
1173 .unlocked_ioctl = video_ioctl2,
1174 .open = vsp1_video_open,
1175 .release = vsp1_video_release,
1176 .poll = vb2_fop_poll,
1177 .mmap = vb2_fop_mmap,
1178 };
1179
1180 /* -----------------------------------------------------------------------------
1181 * Initialization and Cleanup
1182 */
1183
vsp1_video_create(struct vsp1_device * vsp1,struct vsp1_rwpf * rwpf)1184 struct vsp1_video *vsp1_video_create(struct vsp1_device *vsp1,
1185 struct vsp1_rwpf *rwpf)
1186 {
1187 struct vsp1_video *video;
1188 const char *direction;
1189 int ret;
1190
1191 video = devm_kzalloc(vsp1->dev, sizeof(*video), GFP_KERNEL);
1192 if (!video)
1193 return ERR_PTR(-ENOMEM);
1194
1195 rwpf->video = video;
1196
1197 video->vsp1 = vsp1;
1198 video->rwpf = rwpf;
1199
1200 if (rwpf->entity.type == VSP1_ENTITY_RPF) {
1201 direction = "input";
1202 video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
1203 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1204 video->video.vfl_dir = VFL_DIR_TX;
1205 } else {
1206 direction = "output";
1207 video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1208 video->pad.flags = MEDIA_PAD_FL_SINK;
1209 video->video.vfl_dir = VFL_DIR_RX;
1210 }
1211
1212 mutex_init(&video->lock);
1213 spin_lock_init(&video->irqlock);
1214 INIT_LIST_HEAD(&video->irqqueue);
1215
1216 /* Initialize the media entity... */
1217 ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
1218 if (ret < 0)
1219 return ERR_PTR(ret);
1220
1221 /* ... and the format ... */
1222 rwpf->format.pixelformat = VSP1_VIDEO_DEF_FORMAT;
1223 rwpf->format.width = VSP1_VIDEO_DEF_WIDTH;
1224 rwpf->format.height = VSP1_VIDEO_DEF_HEIGHT;
1225 __vsp1_video_try_format(video, &rwpf->format, &rwpf->fmtinfo);
1226
1227 /* ... and the video node... */
1228 video->video.v4l2_dev = &video->vsp1->v4l2_dev;
1229 video->video.fops = &vsp1_video_fops;
1230 snprintf(video->video.name, sizeof(video->video.name), "%s %s",
1231 rwpf->entity.subdev.name, direction);
1232 video->video.vfl_type = VFL_TYPE_GRABBER;
1233 video->video.release = video_device_release_empty;
1234 video->video.ioctl_ops = &vsp1_video_ioctl_ops;
1235
1236 video_set_drvdata(&video->video, video);
1237
1238 video->queue.type = video->type;
1239 video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1240 video->queue.lock = &video->lock;
1241 video->queue.drv_priv = video;
1242 video->queue.buf_struct_size = sizeof(struct vsp1_vb2_buffer);
1243 video->queue.ops = &vsp1_video_queue_qops;
1244 video->queue.mem_ops = &vb2_dma_contig_memops;
1245 video->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1246 video->queue.dev = video->vsp1->bus_master;
1247 ret = vb2_queue_init(&video->queue);
1248 if (ret < 0) {
1249 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
1250 goto error;
1251 }
1252
1253 /* ... and register the video device. */
1254 video->video.queue = &video->queue;
1255 ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1256 if (ret < 0) {
1257 dev_err(video->vsp1->dev, "failed to register video device\n");
1258 goto error;
1259 }
1260
1261 return video;
1262
1263 error:
1264 vsp1_video_cleanup(video);
1265 return ERR_PTR(ret);
1266 }
1267
vsp1_video_cleanup(struct vsp1_video * video)1268 void vsp1_video_cleanup(struct vsp1_video *video)
1269 {
1270 if (video_is_registered(&video->video))
1271 video_unregister_device(&video->video);
1272
1273 media_entity_cleanup(&video->video.entity);
1274 }
1275