drivers/media/platform/vsp1/vsp1_video.c

   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_pipe.h"
  35 #include "vsp1_rwpf.h"
  36 #include "vsp1_uds.h"
  37 #include "vsp1_video.h"
  38
  39 #define VSP1_VIDEO_DEF_FORMAT           V4L2_PIX_FMT_YUYV
  40 #define VSP1_VIDEO_DEF_WIDTH            1024
  41 #define VSP1_VIDEO_DEF_HEIGHT           768
  42
  43 #define VSP1_VIDEO_MIN_WIDTH            2U
  44 #define VSP1_VIDEO_MAX_WIDTH            8190U
  45 #define VSP1_VIDEO_MIN_HEIGHT           2U
  46 #define VSP1_VIDEO_MAX_HEIGHT           8190U
  47
  48 /* -----------------------------------------------------------------------------
  49  * Helper functions
  50  */
  51
  52 static struct v4l2_subdev *
  53 vsp1_video_remote_subdev(struct media_pad *local, u32 *pad)
  54 {
  55         struct media_pad *remote;
  56
  57         remote = media_entity_remote_pad(local);
  58         if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
  59                 return NULL;
  60
  61         if (pad)
  62                 *pad = remote->index;
  63
  64         return media_entity_to_v4l2_subdev(remote->entity);
  65 }
  66
  67 static int vsp1_video_verify_format(struct vsp1_video *video)
  68 {
  69         struct v4l2_subdev_format fmt;
  70         struct v4l2_subdev *subdev;
  71         int ret;
  72
  73         subdev = vsp1_video_remote_subdev(&video->pad, &fmt.pad);
  74         if (subdev == NULL)
  75                 return -EINVAL;
  76
  77         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
  78         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
  79         if (ret < 0)
  80                 return ret == -ENOIOCTLCMD ? -EINVAL : ret;
  81
  82         if (video->rwpf->fmtinfo->mbus != fmt.format.code ||
  83             video->rwpf->format.height != fmt.format.height ||
  84             video->rwpf->format.width != fmt.format.width)
  85                 return -EINVAL;
  86
  87         return 0;
  88 }
  89
  90 static int __vsp1_video_try_format(struct vsp1_video *video,
  91                                    struct v4l2_pix_format_mplane *pix,
  92                                    const struct vsp1_format_info **fmtinfo)
  93 {
  94         static const u32 xrgb_formats[][2] = {
  95                 { V4L2_PIX_FMT_RGB444, V4L2_PIX_FMT_XRGB444 },
  96                 { V4L2_PIX_FMT_RGB555, V4L2_PIX_FMT_XRGB555 },
  97                 { V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_XBGR32 },
  98                 { V4L2_PIX_FMT_RGB32, V4L2_PIX_FMT_XRGB32 },
  99         };
 100
 101         const struct vsp1_format_info *info;
 102         unsigned int width = pix->width;
 103         unsigned int height = pix->height;
 104         unsigned int i;
 105
 106         /* Backward compatibility: replace deprecated RGB formats by their XRGB
 107          * equivalent. This selects the format older userspace applications want
 108          * while still exposing the new format.
 109          */
 110         for (i = 0; i < ARRAY_SIZE(xrgb_formats); ++i) {
 111                 if (xrgb_formats[i][0] == pix->pixelformat) {
 112                         pix->pixelformat = xrgb_formats[i][1];
 113                         break;
 114                 }
 115         }
 116
 117         /* Retrieve format information and select the default format if the
 118          * requested format isn't supported.
 119          */
 120         info = vsp1_get_format_info(pix->pixelformat);
 121         if (info == NULL)
 122                 info = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
 123
 124         pix->pixelformat = info->fourcc;
 125         pix->colorspace = V4L2_COLORSPACE_SRGB;
 126         pix->field = V4L2_FIELD_NONE;
 127         memset(pix->reserved, 0, sizeof(pix->reserved));
 128
 129         /* Align the width and height for YUV 4:2:2 and 4:2:0 formats. */
 130         width = round_down(width, info->hsub);
 131         height = round_down(height, info->vsub);
 132
 133         /* Clamp the width and height. */
 134         pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH);
 135         pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT,
 136                             VSP1_VIDEO_MAX_HEIGHT);
 137
 138         /* Compute and clamp the stride and image size. While not documented in
 139          * the datasheet, strides not aligned to a multiple of 128 bytes result
 140          * in image corruption.
 141          */
 142         for (i = 0; i < min(info->planes, 2U); ++i) {
 143                 unsigned int hsub = i > 0 ? info->hsub : 1;
 144                 unsigned int vsub = i > 0 ? info->vsub : 1;
 145                 unsigned int align = 128;
 146                 unsigned int bpl;
 147
 148                 bpl = clamp_t(unsigned int, pix->plane_fmt[i].bytesperline,
 149                               pix->width / hsub * info->bpp[i] / 8,
 150                               round_down(65535U, align));
 151
 152                 pix->plane_fmt[i].bytesperline = round_up(bpl, align);
 153                 pix->plane_fmt[i].sizeimage = pix->plane_fmt[i].bytesperline
 154                                             * pix->height / vsub;
 155         }
 156
 157         if (info->planes == 3) {
 158                 /* The second and third planes must have the same stride. */
 159                 pix->plane_fmt[2].bytesperline = pix->plane_fmt[1].bytesperline;
 160                 pix->plane_fmt[2].sizeimage = pix->plane_fmt[1].sizeimage;
 161         }
 162
 163         pix->num_planes = info->planes;
 164
 165         if (fmtinfo)
 166                 *fmtinfo = info;
 167
 168         return 0;
 169 }
 170
 171 /* -----------------------------------------------------------------------------
 172  * Pipeline Management
 173  */
 174
 175 static int vsp1_video_pipeline_validate_branch(struct vsp1_pipeline *pipe,
 176                                                struct vsp1_rwpf *input,
 177                                                struct vsp1_rwpf *output)
 178 {
 179         struct media_entity_enum ent_enum;
 180         struct vsp1_entity *entity;
 181         struct media_pad *pad;
 182         bool bru_found = false;
 183         int ret;
 184
 185         ret = media_entity_enum_init(&ent_enum, &input->entity.vsp1->media_dev);
 186         if (ret < 0)
 187                 return ret;
 188
 189         pad = media_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
 190
 191         while (1) {
 192                 if (pad == NULL) {
 193                         ret = -EPIPE;
 194                         goto out;
 195                 }
 196
 197                 /* We've reached a video node, that shouldn't have happened. */
 198                 if (!is_media_entity_v4l2_subdev(pad->entity)) {
 199                         ret = -EPIPE;
 200                         goto out;
 201                 }
 202
 203                 entity = to_vsp1_entity(
 204                         media_entity_to_v4l2_subdev(pad->entity));
 205
 206                 /* A BRU is present in the pipeline, store the BRU input pad
 207                  * number in the input RPF for use when configuring the RPF.
 208                  */
 209                 if (entity->type == VSP1_ENTITY_BRU) {
 210                         struct vsp1_bru *bru = to_bru(&entity->subdev);
 211
 212                         bru->inputs[pad->index].rpf = input;
 213                         input->bru_input = pad->index;
 214
 215                         bru_found = true;
 216                 }
 217
 218                 /* We've reached the WPF, we're done. */
 219                 if (entity->type == VSP1_ENTITY_WPF)
 220                         break;
 221
 222                 /* Ensure the branch has no loop. */
 223                 if (media_entity_enum_test_and_set(&ent_enum,
 224                                                    &entity->subdev.entity)) {
 225                         ret = -EPIPE;
 226                         goto out;
 227                 }
 228
 229                 /* UDS can't be chained. */
 230                 if (entity->type == VSP1_ENTITY_UDS) {
 231                         if (pipe->uds) {
 232                                 ret = -EPIPE;
 233                                 goto out;
 234                         }
 235
 236                         pipe->uds = entity;
 237                         pipe->uds_input = bru_found ? pipe->bru
 238                                         : &input->entity;
 239                 }
 240
 241                 /* Follow the source link. The link setup operations ensure
 242                  * that the output fan-out can't be more than one, there is thus
 243                  * no need to verify here that only a single source link is
 244                  * activated.
 245                  */
 246                 pad = &entity->pads[entity->source_pad];
 247                 pad = media_entity_remote_pad(pad);
 248         }
 249
 250         /* The last entity must be the output WPF. */
 251         if (entity != &output->entity)
 252                 ret = -EPIPE;
 253
 254 out:
 255         media_entity_enum_cleanup(&ent_enum);
 256
 257         return ret;
 258 }
 259
 260 static int vsp1_video_pipeline_validate(struct vsp1_pipeline *pipe,
 261                                         struct vsp1_video *video)
 262 {
 263         struct media_entity_graph graph;
 264         struct media_entity *entity = &video->video.entity;
 265         struct media_device *mdev = entity->graph_obj.mdev;
 266         unsigned int i;
 267         int ret;
 268
 269         mutex_lock(&mdev->graph_mutex);
 270
 271         /* Walk the graph to locate the entities and video nodes. */
 272         ret = media_entity_graph_walk_init(&graph, mdev);
 273         if (ret) {
 274                 mutex_unlock(&mdev->graph_mutex);
 275                 return ret;
 276         }
 277
 278         media_entity_graph_walk_start(&graph, entity);
 279
 280         while ((entity = media_entity_graph_walk_next(&graph))) {
 281                 struct v4l2_subdev *subdev;
 282                 struct vsp1_rwpf *rwpf;
 283                 struct vsp1_entity *e;
 284
 285                 if (!is_media_entity_v4l2_subdev(entity))
 286                         continue;
 287
 288                 subdev = media_entity_to_v4l2_subdev(entity);
 289                 e = to_vsp1_entity(subdev);
 290                 list_add_tail(&e->list_pipe, &pipe->entities);
 291
 292                 if (e->type == VSP1_ENTITY_RPF) {
 293                         rwpf = to_rwpf(subdev);
 294                         pipe->inputs[rwpf->entity.index] = rwpf;
 295                         rwpf->video->pipe_index = ++pipe->num_inputs;
 296                 } else if (e->type == VSP1_ENTITY_WPF) {
 297                         rwpf = to_rwpf(subdev);
 298                         pipe->output = rwpf;
 299                         rwpf->video->pipe_index = 0;
 300                 } else if (e->type == VSP1_ENTITY_LIF) {
 301                         pipe->lif = e;
 302                 } else if (e->type == VSP1_ENTITY_BRU) {
 303                         pipe->bru = e;
 304                 }
 305         }
 306
 307         mutex_unlock(&mdev->graph_mutex);
 308
 309         media_entity_graph_walk_cleanup(&graph);
 310
 311         /* We need one output and at least one input. */
 312         if (pipe->num_inputs == 0 || !pipe->output) {
 313                 ret = -EPIPE;
 314                 goto error;
 315         }
 316
 317         /* Follow links downstream for each input and make sure the graph
 318          * contains no loop and that all branches end at the output WPF.
 319          */
 320         for (i = 0; i < video->vsp1->info->rpf_count; ++i) {
 321                 if (!pipe->inputs[i])
 322                         continue;
 323
 324                 ret = vsp1_video_pipeline_validate_branch(pipe, pipe->inputs[i],
 325                                                           pipe->output);
 326                 if (ret < 0)
 327                         goto error;
 328         }
 329
 330         return 0;
 331
 332 error:
 333         vsp1_pipeline_reset(pipe);
 334         return ret;
 335 }
 336
 337 static int vsp1_video_pipeline_init(struct vsp1_pipeline *pipe,
 338                                     struct vsp1_video *video)
 339 {
 340         int ret;
 341
 342         mutex_lock(&pipe->lock);
 343
 344         /* If we're the first user validate and initialize the pipeline. */
 345         if (pipe->use_count == 0) {
 346                 ret = vsp1_video_pipeline_validate(pipe, video);
 347                 if (ret < 0)
 348                         goto done;
 349         }
 350
 351         pipe->use_count++;
 352         ret = 0;
 353
 354 done:
 355         mutex_unlock(&pipe->lock);
 356         return ret;
 357 }
 358
 359 static void vsp1_video_pipeline_cleanup(struct vsp1_pipeline *pipe)
 360 {
 361         mutex_lock(&pipe->lock);
 362
 363         /* If we're the last user clean up the pipeline. */
 364         if (--pipe->use_count == 0)
 365                 vsp1_pipeline_reset(pipe);
 366
 367         mutex_unlock(&pipe->lock);
 368 }
 369
 370 /*
 371  * vsp1_video_complete_buffer - Complete the current buffer
 372  * @video: the video node
 373  *
 374  * This function completes the current buffer by filling its sequence number,
 375  * time stamp and payload size, and hands it back to the videobuf core.
 376  *
 377  * When operating in DU output mode (deep pipeline to the DU through the LIF),
 378  * the VSP1 needs to constantly supply frames to the display. In that case, if
 379  * no other buffer is queued, reuse the one that has just been processed instead
 380  * of handing it back to the videobuf core.
 381  *
 382  * Return the next queued buffer or NULL if the queue is empty.
 383  */
 384 static struct vsp1_vb2_buffer *
 385 vsp1_video_complete_buffer(struct vsp1_video *video)
 386 {
 387         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 388         struct vsp1_vb2_buffer *next = NULL;
 389         struct vsp1_vb2_buffer *done;
 390         unsigned long flags;
 391         unsigned int i;
 392
 393         spin_lock_irqsave(&video->irqlock, flags);
 394
 395         if (list_empty(&video->irqqueue)) {
 396                 spin_unlock_irqrestore(&video->irqlock, flags);
 397                 return NULL;
 398         }
 399
 400         done = list_first_entry(&video->irqqueue,
 401                                 struct vsp1_vb2_buffer, queue);
 402
 403         /* In DU output mode reuse the buffer if the list is singular. */
 404         if (pipe->lif && list_is_singular(&video->irqqueue)) {
 405                 spin_unlock_irqrestore(&video->irqlock, flags);
 406                 return done;
 407         }
 408
 409         list_del(&done->queue);
 410
 411         if (!list_empty(&video->irqqueue))
 412                 next = list_first_entry(&video->irqqueue,
 413                                         struct vsp1_vb2_buffer, queue);
 414
 415         spin_unlock_irqrestore(&video->irqlock, flags);
 416
 417         done->buf.sequence = video->sequence++;
 418         done->buf.vb2_buf.timestamp = ktime_get_ns();
 419         for (i = 0; i < done->buf.vb2_buf.num_planes; ++i)
 420                 vb2_set_plane_payload(&done->buf.vb2_buf, i,
 421                                       vb2_plane_size(&done->buf.vb2_buf, i));
 422         vb2_buffer_done(&done->buf.vb2_buf, VB2_BUF_STATE_DONE);
 423
 424         return next;
 425 }
 426
 427 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
 428                                  struct vsp1_rwpf *rwpf)
 429 {
 430         struct vsp1_video *video = rwpf->video;
 431         struct vsp1_vb2_buffer *buf;
 432         unsigned long flags;
 433
 434         buf = vsp1_video_complete_buffer(video);
 435         if (buf == NULL)
 436                 return;
 437
 438         spin_lock_irqsave(&pipe->irqlock, flags);
 439
 440         video->rwpf->mem = buf->mem;
 441         pipe->buffers_ready |= 1 << video->pipe_index;
 442
 443         spin_unlock_irqrestore(&pipe->irqlock, flags);
 444 }
 445
 446 static void vsp1_video_pipeline_run(struct vsp1_pipeline *pipe)
 447 {
 448         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 449         unsigned int i;
 450
 451         if (!pipe->dl)
 452                 pipe->dl = vsp1_dl_list_get(pipe->output->dlm);
 453
 454         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 455                 struct vsp1_rwpf *rwpf = pipe->inputs[i];
 456
 457                 if (rwpf)
 458                         vsp1_rwpf_set_memory(rwpf, pipe->dl);
 459         }
 460
 461         if (!pipe->lif)
 462                 vsp1_rwpf_set_memory(pipe->output, pipe->dl);
 463
 464         vsp1_dl_list_commit(pipe->dl);
 465         pipe->dl = NULL;
 466
 467         vsp1_pipeline_run(pipe);
 468 }
 469
 470 static void vsp1_video_pipeline_frame_end(struct vsp1_pipeline *pipe)
 471 {
 472         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 473         enum vsp1_pipeline_state state;
 474         unsigned long flags;
 475         unsigned int i;
 476
 477         /* Complete buffers on all video nodes. */
 478         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 479                 if (!pipe->inputs[i])
 480                         continue;
 481
 482                 vsp1_video_frame_end(pipe, pipe->inputs[i]);
 483         }
 484
 485         vsp1_video_frame_end(pipe, pipe->output);
 486
 487         spin_lock_irqsave(&pipe->irqlock, flags);
 488
 489         state = pipe->state;
 490         pipe->state = VSP1_PIPELINE_STOPPED;
 491
 492         /* If a stop has been requested, mark the pipeline as stopped and
 493          * return. Otherwise restart the pipeline if ready.
 494          */
 495         if (state == VSP1_PIPELINE_STOPPING)
 496                 wake_up(&pipe->wq);
 497         else if (vsp1_pipeline_ready(pipe))
 498                 vsp1_video_pipeline_run(pipe);
 499
 500         spin_unlock_irqrestore(&pipe->irqlock, flags);
 501 }
 502
 503 /* -----------------------------------------------------------------------------
 504  * videobuf2 Queue Operations
 505  */
 506
 507 static int
 508 vsp1_video_queue_setup(struct vb2_queue *vq,
 509                      unsigned int *nbuffers, unsigned int *nplanes,
 510                      unsigned int sizes[], void *alloc_ctxs[])
 511 {
 512         struct vsp1_video *video = vb2_get_drv_priv(vq);
 513         const struct v4l2_pix_format_mplane *format = &video->rwpf->format;
 514         unsigned int i;
 515
 516         if (*nplanes) {
 517                 if (*nplanes != format->num_planes)
 518                         return -EINVAL;
 519
 520                 for (i = 0; i < *nplanes; i++) {
 521                         if (sizes[i] < format->plane_fmt[i].sizeimage)
 522                                 return -EINVAL;
 523                         alloc_ctxs[i] = video->alloc_ctx;
 524                 }
 525                 return 0;
 526         }
 527
 528         *nplanes = format->num_planes;
 529
 530         for (i = 0; i < format->num_planes; ++i) {
 531                 sizes[i] = format->plane_fmt[i].sizeimage;
 532                 alloc_ctxs[i] = video->alloc_ctx;
 533         }
 534
 535         return 0;
 536 }
 537
 538 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
 539 {
 540         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 541         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 542         struct vsp1_vb2_buffer *buf = to_vsp1_vb2_buffer(vbuf);
 543         const struct v4l2_pix_format_mplane *format = &video->rwpf->format;
 544         unsigned int i;
 545
 546         if (vb->num_planes < format->num_planes)
 547                 return -EINVAL;
 548
 549         for (i = 0; i < vb->num_planes; ++i) {
 550                 buf->mem.addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 551
 552                 if (vb2_plane_size(vb, i) < format->plane_fmt[i].sizeimage)
 553                         return -EINVAL;
 554         }
 555
 556         for ( ; i < 3; ++i)
 557                 buf->mem.addr[i] = 0;
 558
 559         return 0;
 560 }
 561
 562 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
 563 {
 564         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 565         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 566         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 567         struct vsp1_vb2_buffer *buf = to_vsp1_vb2_buffer(vbuf);
 568         unsigned long flags;
 569         bool empty;
 570
 571         spin_lock_irqsave(&video->irqlock, flags);
 572         empty = list_empty(&video->irqqueue);
 573         list_add_tail(&buf->queue, &video->irqqueue);
 574         spin_unlock_irqrestore(&video->irqlock, flags);
 575
 576         if (!empty)
 577                 return;
 578
 579         spin_lock_irqsave(&pipe->irqlock, flags);
 580
 581         video->rwpf->mem = buf->mem;
 582         pipe->buffers_ready |= 1 << video->pipe_index;
 583
 584         if (vb2_is_streaming(&video->queue) &&
 585             vsp1_pipeline_ready(pipe))
 586                 vsp1_video_pipeline_run(pipe);
 587
 588         spin_unlock_irqrestore(&pipe->irqlock, flags);
 589 }
 590
 591 static int vsp1_video_setup_pipeline(struct vsp1_pipeline *pipe)
 592 {
 593         struct vsp1_entity *entity;
 594
 595         /* Prepare the display list. */
 596         pipe->dl = vsp1_dl_list_get(pipe->output->dlm);
 597         if (!pipe->dl)
 598                 return -ENOMEM;
 599
 600         if (pipe->uds) {
 601                 struct vsp1_uds *uds = to_uds(&pipe->uds->subdev);
 602
 603                 /* If a BRU is present in the pipeline before the UDS, the alpha
 604                  * component doesn't need to be scaled as the BRU output alpha
 605                  * value is fixed to 255. Otherwise we need to scale the alpha
 606                  * component only when available at the input RPF.
 607                  */
 608                 if (pipe->uds_input->type == VSP1_ENTITY_BRU) {
 609                         uds->scale_alpha = false;
 610                 } else {
 611                         struct vsp1_rwpf *rpf =
 612                                 to_rwpf(&pipe->uds_input->subdev);
 613
 614                         uds->scale_alpha = rpf->fmtinfo->alpha;
 615                 }
 616         }
 617
 618         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 619                 vsp1_entity_route_setup(entity, pipe->dl);
 620
 621                 if (entity->ops->configure)
 622                         entity->ops->configure(entity, pipe->dl);
 623         }
 624
 625         return 0;
 626 }
 627
 628 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 629 {
 630         struct vsp1_video *video = vb2_get_drv_priv(vq);
 631         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 632         unsigned long flags;
 633         int ret;
 634
 635         mutex_lock(&pipe->lock);
 636         if (pipe->stream_count == pipe->num_inputs) {
 637                 ret = vsp1_video_setup_pipeline(pipe);
 638                 if (ret < 0) {
 639                         mutex_unlock(&pipe->lock);
 640                         return ret;
 641                 }
 642         }
 643
 644         pipe->stream_count++;
 645         mutex_unlock(&pipe->lock);
 646
 647         spin_lock_irqsave(&pipe->irqlock, flags);
 648         if (vsp1_pipeline_ready(pipe))
 649                 vsp1_video_pipeline_run(pipe);
 650         spin_unlock_irqrestore(&pipe->irqlock, flags);
 651
 652         return 0;
 653 }
 654
 655 static void vsp1_video_stop_streaming(struct vb2_queue *vq)
 656 {
 657         struct vsp1_video *video = vb2_get_drv_priv(vq);
 658         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 659         struct vsp1_vb2_buffer *buffer;
 660         unsigned long flags;
 661         int ret;
 662
 663         mutex_lock(&pipe->lock);
 664         if (--pipe->stream_count == 0) {
 665                 /* Stop the pipeline. */
 666                 ret = vsp1_pipeline_stop(pipe);
 667                 if (ret == -ETIMEDOUT)
 668                         dev_err(video->vsp1->dev, "pipeline stop timeout\n");
 669
 670                 vsp1_dl_list_put(pipe->dl);
 671                 pipe->dl = NULL;
 672         }
 673         mutex_unlock(&pipe->lock);
 674
 675         vsp1_video_pipeline_cleanup(pipe);
 676         media_entity_pipeline_stop(&video->video.entity);
 677
 678         /* Remove all buffers from the IRQ queue. */
 679         spin_lock_irqsave(&video->irqlock, flags);
 680         list_for_each_entry(buffer, &video->irqqueue, queue)
 681                 vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR);
 682         INIT_LIST_HEAD(&video->irqqueue);
 683         spin_unlock_irqrestore(&video->irqlock, flags);
 684 }
 685
 686 static struct vb2_ops vsp1_video_queue_qops = {
 687         .queue_setup = vsp1_video_queue_setup,
 688         .buf_prepare = vsp1_video_buffer_prepare,
 689         .buf_queue = vsp1_video_buffer_queue,
 690         .wait_prepare = vb2_ops_wait_prepare,
 691         .wait_finish = vb2_ops_wait_finish,
 692         .start_streaming = vsp1_video_start_streaming,
 693         .stop_streaming = vsp1_video_stop_streaming,
 694 };
 695
 696 /* -----------------------------------------------------------------------------
 697  * V4L2 ioctls
 698  */
 699
 700 static int
 701 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 702 {
 703         struct v4l2_fh *vfh = file->private_data;
 704         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 705
 706         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
 707                           | V4L2_CAP_VIDEO_CAPTURE_MPLANE
 708                           | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
 709
 710         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 711                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
 712                                  | V4L2_CAP_STREAMING;
 713         else
 714                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
 715                                  | V4L2_CAP_STREAMING;
 716
 717         strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
 718         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 719         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 720                  dev_name(video->vsp1->dev));
 721
 722         return 0;
 723 }
 724
 725 static int
 726 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 727 {
 728         struct v4l2_fh *vfh = file->private_data;
 729         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 730
 731         if (format->type != video->queue.type)
 732                 return -EINVAL;
 733
 734         mutex_lock(&video->lock);
 735         format->fmt.pix_mp = video->rwpf->format;
 736         mutex_unlock(&video->lock);
 737
 738         return 0;
 739 }
 740
 741 static int
 742 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 743 {
 744         struct v4l2_fh *vfh = file->private_data;
 745         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 746
 747         if (format->type != video->queue.type)
 748                 return -EINVAL;
 749
 750         return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
 751 }
 752
 753 static int
 754 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 755 {
 756         struct v4l2_fh *vfh = file->private_data;
 757         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 758         const struct vsp1_format_info *info;
 759         int ret;
 760
 761         if (format->type != video->queue.type)
 762                 return -EINVAL;
 763
 764         ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
 765         if (ret < 0)
 766                 return ret;
 767
 768         mutex_lock(&video->lock);
 769
 770         if (vb2_is_busy(&video->queue)) {
 771                 ret = -EBUSY;
 772                 goto done;
 773         }
 774
 775         video->rwpf->format = format->fmt.pix_mp;
 776         video->rwpf->fmtinfo = info;
 777
 778 done:
 779         mutex_unlock(&video->lock);
 780         return ret;
 781 }
 782
 783 static int
 784 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 785 {
 786         struct v4l2_fh *vfh = file->private_data;
 787         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 788         struct vsp1_pipeline *pipe;
 789         int ret;
 790
 791         if (video->queue.owner && video->queue.owner != file->private_data)
 792                 return -EBUSY;
 793
 794         video->sequence = 0;
 795
 796         /* Start streaming on the pipeline. No link touching an entity in the
 797          * pipeline can be activated or deactivated once streaming is started.
 798          *
 799          * Use the VSP1 pipeline object embedded in the first video object that
 800          * starts streaming.
 801          *
 802          * FIXME: This is racy, the ioctl is only protected by the video node
 803          * lock.
 804          */
 805         pipe = video->video.entity.pipe
 806              ? to_vsp1_pipeline(&video->video.entity) : &video->pipe;
 807
 808         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
 809         if (ret < 0)
 810                 return ret;
 811
 812         /* Verify that the configured format matches the output of the connected
 813          * subdev.
 814          */
 815         ret = vsp1_video_verify_format(video);
 816         if (ret < 0)
 817                 goto err_stop;
 818
 819         ret = vsp1_video_pipeline_init(pipe, video);
 820         if (ret < 0)
 821                 goto err_stop;
 822
 823         /* Start the queue. */
 824         ret = vb2_streamon(&video->queue, type);
 825         if (ret < 0)
 826                 goto err_cleanup;
 827
 828         return 0;
 829
 830 err_cleanup:
 831         vsp1_video_pipeline_cleanup(pipe);
 832 err_stop:
 833         media_entity_pipeline_stop(&video->video.entity);
 834         return ret;
 835 }
 836
 837 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
 838         .vidioc_querycap                = vsp1_video_querycap,
 839         .vidioc_g_fmt_vid_cap_mplane    = vsp1_video_get_format,
 840         .vidioc_s_fmt_vid_cap_mplane    = vsp1_video_set_format,
 841         .vidioc_try_fmt_vid_cap_mplane  = vsp1_video_try_format,
 842         .vidioc_g_fmt_vid_out_mplane    = vsp1_video_get_format,
 843         .vidioc_s_fmt_vid_out_mplane    = vsp1_video_set_format,
 844         .vidioc_try_fmt_vid_out_mplane  = vsp1_video_try_format,
 845         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 846         .vidioc_querybuf                = vb2_ioctl_querybuf,
 847         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 848         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 849         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 850         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 851         .vidioc_streamon                = vsp1_video_streamon,
 852         .vidioc_streamoff               = vb2_ioctl_streamoff,
 853 };
 854
 855 /* -----------------------------------------------------------------------------
 856  * V4L2 File Operations
 857  */
 858
 859 static int vsp1_video_open(struct file *file)
 860 {
 861         struct vsp1_video *video = video_drvdata(file);
 862         struct v4l2_fh *vfh;
 863         int ret = 0;
 864
 865         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
 866         if (vfh == NULL)
 867                 return -ENOMEM;
 868
 869         v4l2_fh_init(vfh, &video->video);
 870         v4l2_fh_add(vfh);
 871
 872         file->private_data = vfh;
 873
 874         ret = vsp1_device_get(video->vsp1);
 875         if (ret < 0) {
 876                 v4l2_fh_del(vfh);
 877                 kfree(vfh);
 878         }
 879
 880         return ret;
 881 }
 882
 883 static int vsp1_video_release(struct file *file)
 884 {
 885         struct vsp1_video *video = video_drvdata(file);
 886         struct v4l2_fh *vfh = file->private_data;
 887
 888         mutex_lock(&video->lock);
 889         if (video->queue.owner == vfh) {
 890                 vb2_queue_release(&video->queue);
 891                 video->queue.owner = NULL;
 892         }
 893         mutex_unlock(&video->lock);
 894
 895         vsp1_device_put(video->vsp1);
 896
 897         v4l2_fh_release(file);
 898
 899         file->private_data = NULL;
 900
 901         return 0;
 902 }
 903
 904 static struct v4l2_file_operations vsp1_video_fops = {
 905         .owner = THIS_MODULE,
 906         .unlocked_ioctl = video_ioctl2,
 907         .open = vsp1_video_open,
 908         .release = vsp1_video_release,
 909         .poll = vb2_fop_poll,
 910         .mmap = vb2_fop_mmap,
 911 };
 912
 913 /* -----------------------------------------------------------------------------
 914  * Initialization and Cleanup
 915  */
 916
 917 struct vsp1_video *vsp1_video_create(struct vsp1_device *vsp1,
 918                                      struct vsp1_rwpf *rwpf)
 919 {
 920         struct vsp1_video *video;
 921         const char *direction;
 922         int ret;
 923
 924         video = devm_kzalloc(vsp1->dev, sizeof(*video), GFP_KERNEL);
 925         if (!video)
 926                 return ERR_PTR(-ENOMEM);
 927
 928         rwpf->video = video;
 929
 930         video->vsp1 = vsp1;
 931         video->rwpf = rwpf;
 932
 933         if (rwpf->entity.type == VSP1_ENTITY_RPF) {
 934                 direction = "input";
 935                 video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 936                 video->pad.flags = MEDIA_PAD_FL_SOURCE;
 937                 video->video.vfl_dir = VFL_DIR_TX;
 938         } else {
 939                 direction = "output";
 940                 video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 941                 video->pad.flags = MEDIA_PAD_FL_SINK;
 942                 video->video.vfl_dir = VFL_DIR_RX;
 943         }
 944
 945         mutex_init(&video->lock);
 946         spin_lock_init(&video->irqlock);
 947         INIT_LIST_HEAD(&video->irqqueue);
 948
 949         vsp1_pipeline_init(&video->pipe);
 950         video->pipe.frame_end = vsp1_video_pipeline_frame_end;
 951
 952         /* Initialize the media entity... */
 953         ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
 954         if (ret < 0)
 955                 return ERR_PTR(ret);
 956
 957         /* ... and the format ... */
 958         rwpf->format.pixelformat = VSP1_VIDEO_DEF_FORMAT;
 959         rwpf->format.width = VSP1_VIDEO_DEF_WIDTH;
 960         rwpf->format.height = VSP1_VIDEO_DEF_HEIGHT;
 961         __vsp1_video_try_format(video, &rwpf->format, &rwpf->fmtinfo);
 962
 963         /* ... and the video node... */
 964         video->video.v4l2_dev = &video->vsp1->v4l2_dev;
 965         video->video.fops = &vsp1_video_fops;
 966         snprintf(video->video.name, sizeof(video->video.name), "%s %s",
 967                  rwpf->entity.subdev.name, direction);
 968         video->video.vfl_type = VFL_TYPE_GRABBER;
 969         video->video.release = video_device_release_empty;
 970         video->video.ioctl_ops = &vsp1_video_ioctl_ops;
 971
 972         video_set_drvdata(&video->video, video);
 973
 974         /* ... and the buffers queue... */
 975         video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
 976         if (IS_ERR(video->alloc_ctx)) {
 977                 ret = PTR_ERR(video->alloc_ctx);
 978                 goto error;
 979         }
 980
 981         video->queue.type = video->type;
 982         video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
 983         video->queue.lock = &video->lock;
 984         video->queue.drv_priv = video;
 985         video->queue.buf_struct_size = sizeof(struct vsp1_vb2_buffer);
 986         video->queue.ops = &vsp1_video_queue_qops;
 987         video->queue.mem_ops = &vb2_dma_contig_memops;
 988         video->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 989         ret = vb2_queue_init(&video->queue);
 990         if (ret < 0) {
 991                 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
 992                 goto error;
 993         }
 994
 995         /* ... and register the video device. */
 996         video->video.queue = &video->queue;
 997         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
 998         if (ret < 0) {
 999                 dev_err(video->vsp1->dev, "failed to register video device\n");
1000                 goto error;
1001         }
1002
1003         return video;
1004
1005 error:
1006         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1007         vsp1_video_cleanup(video);
1008         return ERR_PTR(ret);
1009 }
1010
1011 void vsp1_video_cleanup(struct vsp1_video *video)
1012 {
1013         if (video_is_registered(&video->video))
1014                 video_unregister_device(&video->video);
1015
1016         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1017         media_entity_cleanup(&video->video.entity);
1018 }