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 /*
 176  * vsp1_video_complete_buffer - Complete the current buffer
 177  * @video: the video node
 178  *
 179  * This function completes the current buffer by filling its sequence number,
 180  * time stamp and payload size, and hands it back to the videobuf core.
 181  *
 182  * When operating in DU output mode (deep pipeline to the DU through the LIF),
 183  * the VSP1 needs to constantly supply frames to the display. In that case, if
 184  * no other buffer is queued, reuse the one that has just been processed instead
 185  * of handing it back to the videobuf core.
 186  *
 187  * Return the next queued buffer or NULL if the queue is empty.
 188  */
 189 static struct vsp1_vb2_buffer *
 190 vsp1_video_complete_buffer(struct vsp1_video *video)
 191 {
 192         struct vsp1_pipeline *pipe = video->rwpf->pipe;
 193         struct vsp1_vb2_buffer *next = NULL;
 194         struct vsp1_vb2_buffer *done;
 195         unsigned long flags;
 196         unsigned int i;
 197
 198         spin_lock_irqsave(&video->irqlock, flags);
 199
 200         if (list_empty(&video->irqqueue)) {
 201                 spin_unlock_irqrestore(&video->irqlock, flags);
 202                 return NULL;
 203         }
 204
 205         done = list_first_entry(&video->irqqueue,
 206                                 struct vsp1_vb2_buffer, queue);
 207
 208         /* In DU output mode reuse the buffer if the list is singular. */
 209         if (pipe->lif && list_is_singular(&video->irqqueue)) {
 210                 spin_unlock_irqrestore(&video->irqlock, flags);
 211                 return done;
 212         }
 213
 214         list_del(&done->queue);
 215
 216         if (!list_empty(&video->irqqueue))
 217                 next = list_first_entry(&video->irqqueue,
 218                                         struct vsp1_vb2_buffer, queue);
 219
 220         spin_unlock_irqrestore(&video->irqlock, flags);
 221
 222         done->buf.sequence = video->sequence++;
 223         done->buf.vb2_buf.timestamp = ktime_get_ns();
 224         for (i = 0; i < done->buf.vb2_buf.num_planes; ++i)
 225                 vb2_set_plane_payload(&done->buf.vb2_buf, i,
 226                                       vb2_plane_size(&done->buf.vb2_buf, i));
 227         vb2_buffer_done(&done->buf.vb2_buf, VB2_BUF_STATE_DONE);
 228
 229         return next;
 230 }
 231
 232 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
 233                                  struct vsp1_rwpf *rwpf)
 234 {
 235         struct vsp1_video *video = rwpf->video;
 236         struct vsp1_vb2_buffer *buf;
 237         unsigned long flags;
 238
 239         buf = vsp1_video_complete_buffer(video);
 240         if (buf == NULL)
 241                 return;
 242
 243         spin_lock_irqsave(&pipe->irqlock, flags);
 244
 245         video->rwpf->mem = buf->mem;
 246         pipe->buffers_ready |= 1 << video->pipe_index;
 247
 248         spin_unlock_irqrestore(&pipe->irqlock, flags);
 249 }
 250
 251 static void vsp1_video_pipeline_run(struct vsp1_pipeline *pipe)
 252 {
 253         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 254         unsigned int i;
 255
 256         if (!pipe->dl)
 257                 pipe->dl = vsp1_dl_list_get(pipe->output->dlm);
 258
 259         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 260                 struct vsp1_rwpf *rwpf = pipe->inputs[i];
 261
 262                 if (rwpf)
 263                         vsp1_rwpf_set_memory(rwpf, pipe->dl);
 264         }
 265
 266         if (!pipe->lif)
 267                 vsp1_rwpf_set_memory(pipe->output, pipe->dl);
 268
 269         vsp1_dl_list_commit(pipe->dl);
 270         pipe->dl = NULL;
 271
 272         vsp1_pipeline_run(pipe);
 273 }
 274
 275 static void vsp1_video_pipeline_frame_end(struct vsp1_pipeline *pipe)
 276 {
 277         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 278         enum vsp1_pipeline_state state;
 279         unsigned long flags;
 280         unsigned int i;
 281
 282         /* Complete buffers on all video nodes. */
 283         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 284                 if (!pipe->inputs[i])
 285                         continue;
 286
 287                 vsp1_video_frame_end(pipe, pipe->inputs[i]);
 288         }
 289
 290         vsp1_video_frame_end(pipe, pipe->output);
 291
 292         spin_lock_irqsave(&pipe->irqlock, flags);
 293
 294         state = pipe->state;
 295         pipe->state = VSP1_PIPELINE_STOPPED;
 296
 297         /* If a stop has been requested, mark the pipeline as stopped and
 298          * return. Otherwise restart the pipeline if ready.
 299          */
 300         if (state == VSP1_PIPELINE_STOPPING)
 301                 wake_up(&pipe->wq);
 302         else if (vsp1_pipeline_ready(pipe))
 303                 vsp1_video_pipeline_run(pipe);
 304
 305         spin_unlock_irqrestore(&pipe->irqlock, flags);
 306 }
 307
 308 static int vsp1_video_pipeline_build_branch(struct vsp1_pipeline *pipe,
 309                                             struct vsp1_rwpf *input,
 310                                             struct vsp1_rwpf *output)
 311 {
 312         struct media_entity_enum ent_enum;
 313         struct vsp1_entity *entity;
 314         struct media_pad *pad;
 315         bool bru_found = false;
 316         int ret;
 317
 318         ret = media_entity_enum_init(&ent_enum, &input->entity.vsp1->media_dev);
 319         if (ret < 0)
 320                 return ret;
 321
 322         pad = media_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
 323
 324         while (1) {
 325                 if (pad == NULL) {
 326                         ret = -EPIPE;
 327                         goto out;
 328                 }
 329
 330                 /* We've reached a video node, that shouldn't have happened. */
 331                 if (!is_media_entity_v4l2_subdev(pad->entity)) {
 332                         ret = -EPIPE;
 333                         goto out;
 334                 }
 335
 336                 entity = to_vsp1_entity(
 337                         media_entity_to_v4l2_subdev(pad->entity));
 338
 339                 /* A BRU is present in the pipeline, store the BRU input pad
 340                  * number in the input RPF for use when configuring the RPF.
 341                  */
 342                 if (entity->type == VSP1_ENTITY_BRU) {
 343                         struct vsp1_bru *bru = to_bru(&entity->subdev);
 344
 345                         bru->inputs[pad->index].rpf = input;
 346                         input->bru_input = pad->index;
 347
 348                         bru_found = true;
 349                 }
 350
 351                 /* We've reached the WPF, we're done. */
 352                 if (entity->type == VSP1_ENTITY_WPF)
 353                         break;
 354
 355                 /* Ensure the branch has no loop. */
 356                 if (media_entity_enum_test_and_set(&ent_enum,
 357                                                    &entity->subdev.entity)) {
 358                         ret = -EPIPE;
 359                         goto out;
 360                 }
 361
 362                 /* UDS can't be chained. */
 363                 if (entity->type == VSP1_ENTITY_UDS) {
 364                         if (pipe->uds) {
 365                                 ret = -EPIPE;
 366                                 goto out;
 367                         }
 368
 369                         pipe->uds = entity;
 370                         pipe->uds_input = bru_found ? pipe->bru
 371                                         : &input->entity;
 372                 }
 373
 374                 /* Follow the source link. The link setup operations ensure
 375                  * that the output fan-out can't be more than one, there is thus
 376                  * no need to verify here that only a single source link is
 377                  * activated.
 378                  */
 379                 pad = &entity->pads[entity->source_pad];
 380                 pad = media_entity_remote_pad(pad);
 381         }
 382
 383         /* The last entity must be the output WPF. */
 384         if (entity != &output->entity)
 385                 ret = -EPIPE;
 386
 387 out:
 388         media_entity_enum_cleanup(&ent_enum);
 389
 390         return ret;
 391 }
 392
 393 static int vsp1_video_pipeline_build(struct vsp1_pipeline *pipe,
 394                                      struct vsp1_video *video)
 395 {
 396         struct media_entity_graph graph;
 397         struct media_entity *entity = &video->video.entity;
 398         struct media_device *mdev = entity->graph_obj.mdev;
 399         unsigned int i;
 400         int ret;
 401
 402         /* Walk the graph to locate the entities and video nodes. */
 403         ret = media_entity_graph_walk_init(&graph, mdev);
 404         if (ret)
 405                 return ret;
 406
 407         media_entity_graph_walk_start(&graph, entity);
 408
 409         while ((entity = media_entity_graph_walk_next(&graph))) {
 410                 struct v4l2_subdev *subdev;
 411                 struct vsp1_rwpf *rwpf;
 412                 struct vsp1_entity *e;
 413
 414                 if (!is_media_entity_v4l2_subdev(entity))
 415                         continue;
 416
 417                 subdev = media_entity_to_v4l2_subdev(entity);
 418                 e = to_vsp1_entity(subdev);
 419                 list_add_tail(&e->list_pipe, &pipe->entities);
 420
 421                 if (e->type == VSP1_ENTITY_RPF) {
 422                         rwpf = to_rwpf(subdev);
 423                         pipe->inputs[rwpf->entity.index] = rwpf;
 424                         rwpf->video->pipe_index = ++pipe->num_inputs;
 425                         rwpf->pipe = pipe;
 426                 } else if (e->type == VSP1_ENTITY_WPF) {
 427                         rwpf = to_rwpf(subdev);
 428                         pipe->output = rwpf;
 429                         rwpf->video->pipe_index = 0;
 430                         rwpf->pipe = pipe;
 431                 } else if (e->type == VSP1_ENTITY_LIF) {
 432                         pipe->lif = e;
 433                 } else if (e->type == VSP1_ENTITY_BRU) {
 434                         pipe->bru = e;
 435                 }
 436         }
 437
 438         media_entity_graph_walk_cleanup(&graph);
 439
 440         /* We need one output and at least one input. */
 441         if (pipe->num_inputs == 0 || !pipe->output)
 442                 return -EPIPE;
 443
 444         /* Follow links downstream for each input and make sure the graph
 445          * contains no loop and that all branches end at the output WPF.
 446          */
 447         for (i = 0; i < video->vsp1->info->rpf_count; ++i) {
 448                 if (!pipe->inputs[i])
 449                         continue;
 450
 451                 ret = vsp1_video_pipeline_build_branch(pipe, pipe->inputs[i],
 452                                                        pipe->output);
 453                 if (ret < 0)
 454                         return ret;
 455         }
 456
 457         return 0;
 458 }
 459
 460 static int vsp1_video_pipeline_init(struct vsp1_pipeline *pipe,
 461                                     struct vsp1_video *video)
 462 {
 463         vsp1_pipeline_init(pipe);
 464
 465         pipe->frame_end = vsp1_video_pipeline_frame_end;
 466
 467         return vsp1_video_pipeline_build(pipe, video);
 468 }
 469
 470 static struct vsp1_pipeline *vsp1_video_pipeline_get(struct vsp1_video *video)
 471 {
 472         struct vsp1_pipeline *pipe;
 473         int ret;
 474
 475         /* Get a pipeline object for the video node. If a pipeline has already
 476          * been allocated just increment its reference count and return it.
 477          * Otherwise allocate a new pipeline and initialize it, it will be freed
 478          * when the last reference is released.
 479          */
 480         if (!video->rwpf->pipe) {
 481                 pipe = kzalloc(sizeof(*pipe), GFP_KERNEL);
 482                 if (!pipe)
 483                         return ERR_PTR(-ENOMEM);
 484
 485                 ret = vsp1_video_pipeline_init(pipe, video);
 486                 if (ret < 0) {
 487                         vsp1_pipeline_reset(pipe);
 488                         kfree(pipe);
 489                         return ERR_PTR(ret);
 490                 }
 491         } else {
 492                 pipe = video->rwpf->pipe;
 493                 kref_get(&pipe->kref);
 494         }
 495
 496         return pipe;
 497 }
 498
 499 static void vsp1_video_pipeline_release(struct kref *kref)
 500 {
 501         struct vsp1_pipeline *pipe = container_of(kref, typeof(*pipe), kref);
 502
 503         vsp1_pipeline_reset(pipe);
 504         kfree(pipe);
 505 }
 506
 507 static void vsp1_video_pipeline_put(struct vsp1_pipeline *pipe)
 508 {
 509         struct media_device *mdev = &pipe->output->entity.vsp1->media_dev;
 510
 511         mutex_lock(&mdev->graph_mutex);
 512         kref_put(&pipe->kref, vsp1_video_pipeline_release);
 513         mutex_unlock(&mdev->graph_mutex);
 514 }
 515
 516 /* -----------------------------------------------------------------------------
 517  * videobuf2 Queue Operations
 518  */
 519
 520 static int
 521 vsp1_video_queue_setup(struct vb2_queue *vq,
 522                        unsigned int *nbuffers, unsigned int *nplanes,
 523                        unsigned int sizes[], struct device *alloc_devs[])
 524 {
 525         struct vsp1_video *video = vb2_get_drv_priv(vq);
 526         const struct v4l2_pix_format_mplane *format = &video->rwpf->format;
 527         unsigned int i;
 528
 529         if (*nplanes) {
 530                 if (*nplanes != format->num_planes)
 531                         return -EINVAL;
 532
 533                 for (i = 0; i < *nplanes; i++)
 534                         if (sizes[i] < format->plane_fmt[i].sizeimage)
 535                                 return -EINVAL;
 536                 return 0;
 537         }
 538
 539         *nplanes = format->num_planes;
 540
 541         for (i = 0; i < format->num_planes; ++i)
 542                 sizes[i] = format->plane_fmt[i].sizeimage;
 543
 544         return 0;
 545 }
 546
 547 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
 548 {
 549         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 550         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 551         struct vsp1_vb2_buffer *buf = to_vsp1_vb2_buffer(vbuf);
 552         const struct v4l2_pix_format_mplane *format = &video->rwpf->format;
 553         unsigned int i;
 554
 555         if (vb->num_planes < format->num_planes)
 556                 return -EINVAL;
 557
 558         for (i = 0; i < vb->num_planes; ++i) {
 559                 buf->mem.addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 560
 561                 if (vb2_plane_size(vb, i) < format->plane_fmt[i].sizeimage)
 562                         return -EINVAL;
 563         }
 564
 565         for ( ; i < 3; ++i)
 566                 buf->mem.addr[i] = 0;
 567
 568         return 0;
 569 }
 570
 571 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
 572 {
 573         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 574         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 575         struct vsp1_pipeline *pipe = video->rwpf->pipe;
 576         struct vsp1_vb2_buffer *buf = to_vsp1_vb2_buffer(vbuf);
 577         unsigned long flags;
 578         bool empty;
 579
 580         spin_lock_irqsave(&video->irqlock, flags);
 581         empty = list_empty(&video->irqqueue);
 582         list_add_tail(&buf->queue, &video->irqqueue);
 583         spin_unlock_irqrestore(&video->irqlock, flags);
 584
 585         if (!empty)
 586                 return;
 587
 588         spin_lock_irqsave(&pipe->irqlock, flags);
 589
 590         video->rwpf->mem = buf->mem;
 591         pipe->buffers_ready |= 1 << video->pipe_index;
 592
 593         if (vb2_is_streaming(&video->queue) &&
 594             vsp1_pipeline_ready(pipe))
 595                 vsp1_video_pipeline_run(pipe);
 596
 597         spin_unlock_irqrestore(&pipe->irqlock, flags);
 598 }
 599
 600 static int vsp1_video_setup_pipeline(struct vsp1_pipeline *pipe)
 601 {
 602         struct vsp1_entity *entity;
 603
 604         /* Prepare the display list. */
 605         pipe->dl = vsp1_dl_list_get(pipe->output->dlm);
 606         if (!pipe->dl)
 607                 return -ENOMEM;
 608
 609         if (pipe->uds) {
 610                 struct vsp1_uds *uds = to_uds(&pipe->uds->subdev);
 611
 612                 /* If a BRU is present in the pipeline before the UDS, the alpha
 613                  * component doesn't need to be scaled as the BRU output alpha
 614                  * value is fixed to 255. Otherwise we need to scale the alpha
 615                  * component only when available at the input RPF.
 616                  */
 617                 if (pipe->uds_input->type == VSP1_ENTITY_BRU) {
 618                         uds->scale_alpha = false;
 619                 } else {
 620                         struct vsp1_rwpf *rpf =
 621                                 to_rwpf(&pipe->uds_input->subdev);
 622
 623                         uds->scale_alpha = rpf->fmtinfo->alpha;
 624                 }
 625         }
 626
 627         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 628                 vsp1_entity_route_setup(entity, pipe->dl);
 629
 630                 if (entity->ops->configure)
 631                         entity->ops->configure(entity, pipe, pipe->dl);
 632         }
 633
 634         return 0;
 635 }
 636
 637 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 638 {
 639         struct vsp1_video *video = vb2_get_drv_priv(vq);
 640         struct vsp1_pipeline *pipe = video->rwpf->pipe;
 641         unsigned long flags;
 642         int ret;
 643
 644         mutex_lock(&pipe->lock);
 645         if (pipe->stream_count == pipe->num_inputs) {
 646                 ret = vsp1_video_setup_pipeline(pipe);
 647                 if (ret < 0) {
 648                         mutex_unlock(&pipe->lock);
 649                         return ret;
 650                 }
 651         }
 652
 653         pipe->stream_count++;
 654         mutex_unlock(&pipe->lock);
 655
 656         spin_lock_irqsave(&pipe->irqlock, flags);
 657         if (vsp1_pipeline_ready(pipe))
 658                 vsp1_video_pipeline_run(pipe);
 659         spin_unlock_irqrestore(&pipe->irqlock, flags);
 660
 661         return 0;
 662 }
 663
 664 static void vsp1_video_stop_streaming(struct vb2_queue *vq)
 665 {
 666         struct vsp1_video *video = vb2_get_drv_priv(vq);
 667         struct vsp1_pipeline *pipe = video->rwpf->pipe;
 668         struct vsp1_vb2_buffer *buffer;
 669         unsigned long flags;
 670         int ret;
 671
 672         mutex_lock(&pipe->lock);
 673         if (--pipe->stream_count == 0) {
 674                 /* Stop the pipeline. */
 675                 ret = vsp1_pipeline_stop(pipe);
 676                 if (ret == -ETIMEDOUT)
 677                         dev_err(video->vsp1->dev, "pipeline stop timeout\n");
 678
 679                 vsp1_dl_list_put(pipe->dl);
 680                 pipe->dl = NULL;
 681         }
 682         mutex_unlock(&pipe->lock);
 683
 684         media_entity_pipeline_stop(&video->video.entity);
 685         vsp1_video_pipeline_put(pipe);
 686
 687         /* Remove all buffers from the IRQ queue. */
 688         spin_lock_irqsave(&video->irqlock, flags);
 689         list_for_each_entry(buffer, &video->irqqueue, queue)
 690                 vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR);
 691         INIT_LIST_HEAD(&video->irqqueue);
 692         spin_unlock_irqrestore(&video->irqlock, flags);
 693 }
 694
 695 static struct vb2_ops vsp1_video_queue_qops = {
 696         .queue_setup = vsp1_video_queue_setup,
 697         .buf_prepare = vsp1_video_buffer_prepare,
 698         .buf_queue = vsp1_video_buffer_queue,
 699         .wait_prepare = vb2_ops_wait_prepare,
 700         .wait_finish = vb2_ops_wait_finish,
 701         .start_streaming = vsp1_video_start_streaming,
 702         .stop_streaming = vsp1_video_stop_streaming,
 703 };
 704
 705 /* -----------------------------------------------------------------------------
 706  * V4L2 ioctls
 707  */
 708
 709 static int
 710 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 711 {
 712         struct v4l2_fh *vfh = file->private_data;
 713         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 714
 715         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
 716                           | V4L2_CAP_VIDEO_CAPTURE_MPLANE
 717                           | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
 718
 719         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 720                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
 721                                  | V4L2_CAP_STREAMING;
 722         else
 723                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
 724                                  | V4L2_CAP_STREAMING;
 725
 726         strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
 727         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 728         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 729                  dev_name(video->vsp1->dev));
 730
 731         return 0;
 732 }
 733
 734 static int
 735 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 736 {
 737         struct v4l2_fh *vfh = file->private_data;
 738         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 739
 740         if (format->type != video->queue.type)
 741                 return -EINVAL;
 742
 743         mutex_lock(&video->lock);
 744         format->fmt.pix_mp = video->rwpf->format;
 745         mutex_unlock(&video->lock);
 746
 747         return 0;
 748 }
 749
 750 static int
 751 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 752 {
 753         struct v4l2_fh *vfh = file->private_data;
 754         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 755
 756         if (format->type != video->queue.type)
 757                 return -EINVAL;
 758
 759         return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
 760 }
 761
 762 static int
 763 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 764 {
 765         struct v4l2_fh *vfh = file->private_data;
 766         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 767         const struct vsp1_format_info *info;
 768         int ret;
 769
 770         if (format->type != video->queue.type)
 771                 return -EINVAL;
 772
 773         ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
 774         if (ret < 0)
 775                 return ret;
 776
 777         mutex_lock(&video->lock);
 778
 779         if (vb2_is_busy(&video->queue)) {
 780                 ret = -EBUSY;
 781                 goto done;
 782         }
 783
 784         video->rwpf->format = format->fmt.pix_mp;
 785         video->rwpf->fmtinfo = info;
 786
 787 done:
 788         mutex_unlock(&video->lock);
 789         return ret;
 790 }
 791
 792 static int
 793 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 794 {
 795         struct v4l2_fh *vfh = file->private_data;
 796         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 797         struct media_device *mdev = &video->vsp1->media_dev;
 798         struct vsp1_pipeline *pipe;
 799         int ret;
 800
 801         if (video->queue.owner && video->queue.owner != file->private_data)
 802                 return -EBUSY;
 803
 804         video->sequence = 0;
 805
 806         /* Get a pipeline for the video node and start streaming on it. No link
 807          * touching an entity in the pipeline can be activated or deactivated
 808          * once streaming is started.
 809          */
 810         mutex_lock(&mdev->graph_mutex);
 811
 812         pipe = vsp1_video_pipeline_get(video);
 813         if (IS_ERR(pipe)) {
 814                 mutex_unlock(&mdev->graph_mutex);
 815                 return PTR_ERR(pipe);
 816         }
 817
 818         ret = __media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
 819         if (ret < 0) {
 820                 mutex_unlock(&mdev->graph_mutex);
 821                 goto err_pipe;
 822         }
 823
 824         mutex_unlock(&mdev->graph_mutex);
 825
 826         /* Verify that the configured format matches the output of the connected
 827          * subdev.
 828          */
 829         ret = vsp1_video_verify_format(video);
 830         if (ret < 0)
 831                 goto err_stop;
 832
 833         /* Start the queue. */
 834         ret = vb2_streamon(&video->queue, type);
 835         if (ret < 0)
 836                 goto err_stop;
 837
 838         return 0;
 839
 840 err_stop:
 841         media_entity_pipeline_stop(&video->video.entity);
 842 err_pipe:
 843         vsp1_video_pipeline_put(pipe);
 844         return ret;
 845 }
 846
 847 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
 848         .vidioc_querycap                = vsp1_video_querycap,
 849         .vidioc_g_fmt_vid_cap_mplane    = vsp1_video_get_format,
 850         .vidioc_s_fmt_vid_cap_mplane    = vsp1_video_set_format,
 851         .vidioc_try_fmt_vid_cap_mplane  = vsp1_video_try_format,
 852         .vidioc_g_fmt_vid_out_mplane    = vsp1_video_get_format,
 853         .vidioc_s_fmt_vid_out_mplane    = vsp1_video_set_format,
 854         .vidioc_try_fmt_vid_out_mplane  = vsp1_video_try_format,
 855         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 856         .vidioc_querybuf                = vb2_ioctl_querybuf,
 857         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 858         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 859         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 860         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 861         .vidioc_streamon                = vsp1_video_streamon,
 862         .vidioc_streamoff               = vb2_ioctl_streamoff,
 863 };
 864
 865 /* -----------------------------------------------------------------------------
 866  * V4L2 File Operations
 867  */
 868
 869 static int vsp1_video_open(struct file *file)
 870 {
 871         struct vsp1_video *video = video_drvdata(file);
 872         struct v4l2_fh *vfh;
 873         int ret = 0;
 874
 875         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
 876         if (vfh == NULL)
 877                 return -ENOMEM;
 878
 879         v4l2_fh_init(vfh, &video->video);
 880         v4l2_fh_add(vfh);
 881
 882         file->private_data = vfh;
 883
 884         ret = vsp1_device_get(video->vsp1);
 885         if (ret < 0) {
 886                 v4l2_fh_del(vfh);
 887                 kfree(vfh);
 888         }
 889
 890         return ret;
 891 }
 892
 893 static int vsp1_video_release(struct file *file)
 894 {
 895         struct vsp1_video *video = video_drvdata(file);
 896         struct v4l2_fh *vfh = file->private_data;
 897
 898         mutex_lock(&video->lock);
 899         if (video->queue.owner == vfh) {
 900                 vb2_queue_release(&video->queue);
 901                 video->queue.owner = NULL;
 902         }
 903         mutex_unlock(&video->lock);
 904
 905         vsp1_device_put(video->vsp1);
 906
 907         v4l2_fh_release(file);
 908
 909         file->private_data = NULL;
 910
 911         return 0;
 912 }
 913
 914 static struct v4l2_file_operations vsp1_video_fops = {
 915         .owner = THIS_MODULE,
 916         .unlocked_ioctl = video_ioctl2,
 917         .open = vsp1_video_open,
 918         .release = vsp1_video_release,
 919         .poll = vb2_fop_poll,
 920         .mmap = vb2_fop_mmap,
 921 };
 922
 923 /* -----------------------------------------------------------------------------
 924  * Initialization and Cleanup
 925  */
 926
 927 struct vsp1_video *vsp1_video_create(struct vsp1_device *vsp1,
 928                                      struct vsp1_rwpf *rwpf)
 929 {
 930         struct vsp1_video *video;
 931         const char *direction;
 932         int ret;
 933
 934         video = devm_kzalloc(vsp1->dev, sizeof(*video), GFP_KERNEL);
 935         if (!video)
 936                 return ERR_PTR(-ENOMEM);
 937
 938         rwpf->video = video;
 939
 940         video->vsp1 = vsp1;
 941         video->rwpf = rwpf;
 942
 943         if (rwpf->entity.type == VSP1_ENTITY_RPF) {
 944                 direction = "input";
 945                 video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 946                 video->pad.flags = MEDIA_PAD_FL_SOURCE;
 947                 video->video.vfl_dir = VFL_DIR_TX;
 948         } else {
 949                 direction = "output";
 950                 video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 951                 video->pad.flags = MEDIA_PAD_FL_SINK;
 952                 video->video.vfl_dir = VFL_DIR_RX;
 953         }
 954
 955         mutex_init(&video->lock);
 956         spin_lock_init(&video->irqlock);
 957         INIT_LIST_HEAD(&video->irqqueue);
 958
 959         /* Initialize the media entity... */
 960         ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
 961         if (ret < 0)
 962                 return ERR_PTR(ret);
 963
 964         /* ... and the format ... */
 965         rwpf->format.pixelformat = VSP1_VIDEO_DEF_FORMAT;
 966         rwpf->format.width = VSP1_VIDEO_DEF_WIDTH;
 967         rwpf->format.height = VSP1_VIDEO_DEF_HEIGHT;
 968         __vsp1_video_try_format(video, &rwpf->format, &rwpf->fmtinfo);
 969
 970         /* ... and the video node... */
 971         video->video.v4l2_dev = &video->vsp1->v4l2_dev;
 972         video->video.fops = &vsp1_video_fops;
 973         snprintf(video->video.name, sizeof(video->video.name), "%s %s",
 974                  rwpf->entity.subdev.name, direction);
 975         video->video.vfl_type = VFL_TYPE_GRABBER;
 976         video->video.release = video_device_release_empty;
 977         video->video.ioctl_ops = &vsp1_video_ioctl_ops;
 978
 979         video_set_drvdata(&video->video, video);
 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         video->queue.dev = video->vsp1->dev;
 990         ret = vb2_queue_init(&video->queue);
 991         if (ret < 0) {
 992                 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
 993                 goto error;
 994         }
 995
 996         /* ... and register the video device. */
 997         video->video.queue = &video->queue;
 998         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
 999         if (ret < 0) {
1000                 dev_err(video->vsp1->dev, "failed to register video device\n");
1001                 goto error;
1002         }
1003
1004         return video;
1005
1006 error:
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         media_entity_cleanup(&video->video.entity);
1017 }