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_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 *
  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
  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
  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 static void vsp1_video_pipeline_setup_partitions(struct vsp1_pipeline *pipe)
 186 {
 187         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 188         const struct v4l2_mbus_framefmt *format;
 189         struct vsp1_entity *entity;
 190         unsigned int div_size;
 191
 192         /*
 193          * Partitions are computed on the size before rotation, use the format
 194          * at the WPF sink.
 195          */
 196         format = vsp1_entity_get_pad_format(&pipe->output->entity,
 197                                             pipe->output->entity.config,
 198                                             RWPF_PAD_SINK);
 199         div_size = format->width;
 200
 201         /* Gen2 hardware doesn't require image partitioning. */
 202         if (vsp1->info->gen == 2) {
 203                 pipe->div_size = div_size;
 204                 pipe->partitions = 1;
 205                 return;
 206         }
 207
 208         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 209                 unsigned int entity_max = VSP1_VIDEO_MAX_WIDTH;
 210
 211                 if (entity->ops->max_width) {
 212                         entity_max = entity->ops->max_width(entity, pipe);
 213                         if (entity_max)
 214                                 div_size = min(div_size, entity_max);
 215                 }
 216         }
 217
 218         pipe->div_size = div_size;
 219         pipe->partitions = DIV_ROUND_UP(format->width, div_size);
 220 }
 221
 222 /**
 223  * vsp1_video_partition - Calculate the active partition output window
 224  *
 225  * @div_size: pre-determined maximum partition division size
 226  * @index: partition index
 227  *
 228  * Returns a v4l2_rect describing the partition window.
 229  */
 230 static struct v4l2_rect vsp1_video_partition(struct vsp1_pipeline *pipe,
 231                                              unsigned int div_size,
 232                                              unsigned int index)
 233 {
 234         const struct v4l2_mbus_framefmt *format;
 235         struct v4l2_rect partition;
 236         unsigned int modulus;
 237
 238         /*
 239          * Partitions are computed on the size before rotation, use the format
 240          * at the WPF sink.
 241          */
 242         format = vsp1_entity_get_pad_format(&pipe->output->entity,
 243                                             pipe->output->entity.config,
 244                                             RWPF_PAD_SINK);
 245
 246         /* A single partition simply processes the output size in full. */
 247         if (pipe->partitions <= 1) {
 248                 partition.left = 0;
 249                 partition.top = 0;
 250                 partition.width = format->width;
 251                 partition.height = format->height;
 252                 return partition;
 253         }
 254
 255         /* Initialise the partition with sane starting conditions. */
 256         partition.left = index * div_size;
 257         partition.top = 0;
 258         partition.width = div_size;
 259         partition.height = format->height;
 260
 261         modulus = format->width % div_size;
 262
 263         /*
 264          * We need to prevent the last partition from being smaller than the
 265          * *minimum* width of the hardware capabilities.
 266          *
 267          * If the modulus is less than half of the partition size,
 268          * the penultimate partition is reduced to half, which is added
 269          * to the final partition: |1234|1234|1234|12|341|
 270          * to prevents this:       |1234|1234|1234|1234|1|.
 271          */
 272         if (modulus) {
 273                 /*
 274                  * pipe->partitions is 1 based, whilst index is a 0 based index.
 275                  * Normalise this locally.
 276                  */
 277                 unsigned int partitions = pipe->partitions - 1;
 278
 279                 if (modulus < div_size / 2) {
 280                         if (index == partitions - 1) {
 281                                 /* Halve the penultimate partition. */
 282                                 partition.width = div_size / 2;
 283                         } else if (index == partitions) {
 284                                 /* Increase the final partition. */
 285                                 partition.width = (div_size / 2) + modulus;
 286                                 partition.left -= div_size / 2;
 287                         }
 288                 } else if (index == partitions) {
 289                         partition.width = modulus;
 290                 }
 291         }
 292
 293         return partition;
 294 }
 295
 296 /* -----------------------------------------------------------------------------
 297  * Pipeline Management
 298  */
 299
 300 /*
 301  * vsp1_video_complete_buffer - Complete the current buffer
 302  * @video: the video node
 303  *
 304  * This function completes the current buffer by filling its sequence number,
 305  * time stamp and payload size, and hands it back to the videobuf core.
 306  *
 307  * When operating in DU output mode (deep pipeline to the DU through the LIF),
 308  * the VSP1 needs to constantly supply frames to the display. In that case, if
 309  * no other buffer is queued, reuse the one that has just been processed instead
 310  * of handing it back to the videobuf core.
 311  *
 312  * Return the next queued buffer or NULL if the queue is empty.
 313  */
 314 static struct vsp1_vb2_buffer *
 315 vsp1_video_complete_buffer(struct vsp1_video *video)
 316 {
 317         struct vsp1_pipeline *pipe = video->rwpf->pipe;
 318         struct vsp1_vb2_buffer *next = NULL;
 319         struct vsp1_vb2_buffer *done;
 320         unsigned long flags;
 321         unsigned int i;
 322
 323         spin_lock_irqsave(&video->irqlock, flags);
 324
 325         if (list_empty(&video->irqqueue)) {
 326                 spin_unlock_irqrestore(&video->irqlock, flags);
 327                 return NULL;
 328         }
 329
 330         done = list_first_entry(&video->irqqueue,
 331                                 struct vsp1_vb2_buffer, queue);
 332
 333         /* In DU output mode reuse the buffer if the list is singular. */
 334         if (pipe->lif && list_is_singular(&video->irqqueue)) {
 335                 spin_unlock_irqrestore(&video->irqlock, flags);
 336                 return done;
 337         }
 338
 339         list_del(&done->queue);
 340
 341         if (!list_empty(&video->irqqueue))
 342                 next = list_first_entry(&video->irqqueue,
 343                                         struct vsp1_vb2_buffer, queue);
 344
 345         spin_unlock_irqrestore(&video->irqlock, flags);
 346
 347         done->buf.sequence = pipe->sequence;
 348         done->buf.vb2_buf.timestamp = ktime_get_ns();
 349         for (i = 0; i < done->buf.vb2_buf.num_planes; ++i)
 350                 vb2_set_plane_payload(&done->buf.vb2_buf, i,
 351                                       vb2_plane_size(&done->buf.vb2_buf, i));
 352         vb2_buffer_done(&done->buf.vb2_buf, VB2_BUF_STATE_DONE);
 353
 354         return next;
 355 }
 356
 357 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
 358                                  struct vsp1_rwpf *rwpf)
 359 {
 360         struct vsp1_video *video = rwpf->video;
 361         struct vsp1_vb2_buffer *buf;
 362
 363         buf = vsp1_video_complete_buffer(video);
 364         if (buf == NULL)
 365                 return;
 366
 367         video->rwpf->mem = buf->mem;
 368         pipe->buffers_ready |= 1 << video->pipe_index;
 369 }
 370
 371 static void vsp1_video_pipeline_run_partition(struct vsp1_pipeline *pipe,
 372                                               struct vsp1_dl_list *dl)
 373 {
 374         struct vsp1_entity *entity;
 375
 376         pipe->partition = vsp1_video_partition(pipe, pipe->div_size,
 377                                                pipe->current_partition);
 378
 379         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 380                 if (entity->ops->configure)
 381                         entity->ops->configure(entity, pipe, dl,
 382                                                VSP1_ENTITY_PARAMS_PARTITION);
 383         }
 384 }
 385
 386 static void vsp1_video_pipeline_run(struct vsp1_pipeline *pipe)
 387 {
 388         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 389         struct vsp1_entity *entity;
 390
 391         if (!pipe->dl)
 392                 pipe->dl = vsp1_dl_list_get(pipe->output->dlm);
 393
 394         /*
 395          * Start with the runtime parameters as the configure operation can
 396          * compute/cache information needed when configuring partitions. This
 397          * is the case with flipping in the WPF.
 398          */
 399         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 400                 if (entity->ops->configure)
 401                         entity->ops->configure(entity, pipe, pipe->dl,
 402                                                VSP1_ENTITY_PARAMS_RUNTIME);
 403         }
 404
 405         /* Run the first partition */
 406         pipe->current_partition = 0;
 407         vsp1_video_pipeline_run_partition(pipe, pipe->dl);
 408
 409         /* Process consecutive partitions as necessary */
 410         for (pipe->current_partition = 1;
 411              pipe->current_partition < pipe->partitions;
 412              pipe->current_partition++) {
 413                 struct vsp1_dl_list *dl;
 414
 415                 /*
 416                  * Partition configuration operations will utilise
 417                  * the pipe->current_partition variable to determine
 418                  * the work they should complete.
 419                  */
 420                 dl = vsp1_dl_list_get(pipe->output->dlm);
 421
 422                 /*
 423                  * An incomplete chain will still function, but output only
 424                  * the partitions that had a dl available. The frame end
 425                  * interrupt will be marked on the last dl in the chain.
 426                  */
 427                 if (!dl) {
 428                         dev_err(vsp1->dev, "Failed to obtain a dl list. Frame will be incomplete\n");
 429                         break;
 430                 }
 431
 432                 vsp1_video_pipeline_run_partition(pipe, dl);
 433                 vsp1_dl_list_add_chain(pipe->dl, dl);
 434         }
 435
 436         /* Complete, and commit the head display list. */
 437         vsp1_dl_list_commit(pipe->dl);
 438         pipe->dl = NULL;
 439
 440         vsp1_pipeline_run(pipe);
 441 }
 442
 443 static void vsp1_video_pipeline_frame_end(struct vsp1_pipeline *pipe)
 444 {
 445         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 446         enum vsp1_pipeline_state state;
 447         unsigned long flags;
 448         unsigned int i;
 449
 450         spin_lock_irqsave(&pipe->irqlock, flags);
 451
 452         /* Complete buffers on all video nodes. */
 453         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 454                 if (!pipe->inputs[i])
 455                         continue;
 456
 457                 vsp1_video_frame_end(pipe, pipe->inputs[i]);
 458         }
 459
 460         vsp1_video_frame_end(pipe, pipe->output);
 461
 462         state = pipe->state;
 463         pipe->state = VSP1_PIPELINE_STOPPED;
 464
 465         /*
 466          * If a stop has been requested, mark the pipeline as stopped and
 467          * return. Otherwise restart the pipeline if ready.
 468          */
 469         if (state == VSP1_PIPELINE_STOPPING)
 470                 wake_up(&pipe->wq);
 471         else if (vsp1_pipeline_ready(pipe))
 472                 vsp1_video_pipeline_run(pipe);
 473
 474         spin_unlock_irqrestore(&pipe->irqlock, flags);
 475 }
 476
 477 static int vsp1_video_pipeline_build_branch(struct vsp1_pipeline *pipe,
 478                                             struct vsp1_rwpf *input,
 479                                             struct vsp1_rwpf *output)
 480 {
 481         struct media_entity_enum ent_enum;
 482         struct vsp1_entity *entity;
 483         struct media_pad *pad;
 484         bool bru_found = false;
 485         int ret;
 486
 487         ret = media_entity_enum_init(&ent_enum, &input->entity.vsp1->media_dev);
 488         if (ret < 0)
 489                 return ret;
 490
 491         /*
 492          * The main data path doesn't include the HGO or HGT, use
 493          * vsp1_entity_remote_pad() to traverse the graph.
 494          */
 495
 496         pad = vsp1_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
 497
 498         while (1) {
 499                 if (pad == NULL) {
 500                         ret = -EPIPE;
 501                         goto out;
 502                 }
 503
 504                 /* We've reached a video node, that shouldn't have happened. */
 505                 if (!is_media_entity_v4l2_subdev(pad->entity)) {
 506                         ret = -EPIPE;
 507                         goto out;
 508                 }
 509
 510                 entity = to_vsp1_entity(
 511                         media_entity_to_v4l2_subdev(pad->entity));
 512
 513                 /*
 514                  * A BRU is present in the pipeline, store the BRU input pad
 515                  * number in the input RPF for use when configuring the RPF.
 516                  */
 517                 if (entity->type == VSP1_ENTITY_BRU) {
 518                         struct vsp1_bru *bru = to_bru(&entity->subdev);
 519
 520                         bru->inputs[pad->index].rpf = input;
 521                         input->bru_input = pad->index;
 522
 523                         bru_found = true;
 524                 }
 525
 526                 /* We've reached the WPF, we're done. */
 527                 if (entity->type == VSP1_ENTITY_WPF)
 528                         break;
 529
 530                 /* Ensure the branch has no loop. */
 531                 if (media_entity_enum_test_and_set(&ent_enum,
 532                                                    &entity->subdev.entity)) {
 533                         ret = -EPIPE;
 534                         goto out;
 535                 }
 536
 537                 /* UDS can't be chained. */
 538                 if (entity->type == VSP1_ENTITY_UDS) {
 539                         if (pipe->uds) {
 540                                 ret = -EPIPE;
 541                                 goto out;
 542                         }
 543
 544                         pipe->uds = entity;
 545                         pipe->uds_input = bru_found ? pipe->bru
 546                                         : &input->entity;
 547                 }
 548
 549                 /* Follow the source link, ignoring any HGO or HGT. */
 550                 pad = &entity->pads[entity->source_pad];
 551                 pad = vsp1_entity_remote_pad(pad);
 552         }
 553
 554         /* The last entity must be the output WPF. */
 555         if (entity != &output->entity)
 556                 ret = -EPIPE;
 557
 558 out:
 559         media_entity_enum_cleanup(&ent_enum);
 560
 561         return ret;
 562 }
 563
 564 static int vsp1_video_pipeline_build(struct vsp1_pipeline *pipe,
 565                                      struct vsp1_video *video)
 566 {
 567         struct media_graph graph;
 568         struct media_entity *entity = &video->video.entity;
 569         struct media_device *mdev = entity->graph_obj.mdev;
 570         unsigned int i;
 571         int ret;
 572
 573         /* Walk the graph to locate the entities and video nodes. */
 574         ret = media_graph_walk_init(&graph, mdev);
 575         if (ret)
 576                 return ret;
 577
 578         media_graph_walk_start(&graph, entity);
 579
 580         while ((entity = media_graph_walk_next(&graph))) {
 581                 struct v4l2_subdev *subdev;
 582                 struct vsp1_rwpf *rwpf;
 583                 struct vsp1_entity *e;
 584
 585                 if (!is_media_entity_v4l2_subdev(entity))
 586                         continue;
 587
 588                 subdev = media_entity_to_v4l2_subdev(entity);
 589                 e = to_vsp1_entity(subdev);
 590                 list_add_tail(&e->list_pipe, &pipe->entities);
 591
 592                 if (e->type == VSP1_ENTITY_RPF) {
 593                         rwpf = to_rwpf(subdev);
 594                         pipe->inputs[rwpf->entity.index] = rwpf;
 595                         rwpf->video->pipe_index = ++pipe->num_inputs;
 596                         rwpf->pipe = pipe;
 597                 } else if (e->type == VSP1_ENTITY_WPF) {
 598                         rwpf = to_rwpf(subdev);
 599                         pipe->output = rwpf;
 600                         rwpf->video->pipe_index = 0;
 601                         rwpf->pipe = pipe;
 602                 } else if (e->type == VSP1_ENTITY_LIF) {
 603                         pipe->lif = e;
 604                 } else if (e->type == VSP1_ENTITY_BRU) {
 605                         pipe->bru = e;
 606                 } else if (e->type == VSP1_ENTITY_HGO) {
 607                         struct vsp1_hgo *hgo = to_hgo(subdev);
 608
 609                         pipe->hgo = e;
 610                         hgo->histo.pipe = pipe;
 611                 } else if (e->type == VSP1_ENTITY_HGT) {
 612                         struct vsp1_hgt *hgt = to_hgt(subdev);
 613
 614                         pipe->hgt = e;
 615                         hgt->histo.pipe = pipe;
 616                 }
 617         }
 618
 619         media_graph_walk_cleanup(&graph);
 620
 621         /* We need one output and at least one input. */
 622         if (pipe->num_inputs == 0 || !pipe->output)
 623                 return -EPIPE;
 624
 625         /*
 626          * Follow links downstream for each input and make sure the graph
 627          * contains no loop and that all branches end at the output WPF.
 628          */
 629         for (i = 0; i < video->vsp1->info->rpf_count; ++i) {
 630                 if (!pipe->inputs[i])
 631                         continue;
 632
 633                 ret = vsp1_video_pipeline_build_branch(pipe, pipe->inputs[i],
 634                                                        pipe->output);
 635                 if (ret < 0)
 636                         return ret;
 637         }
 638
 639         return 0;
 640 }
 641
 642 static int vsp1_video_pipeline_init(struct vsp1_pipeline *pipe,
 643                                     struct vsp1_video *video)
 644 {
 645         vsp1_pipeline_init(pipe);
 646
 647         pipe->frame_end = vsp1_video_pipeline_frame_end;
 648
 649         return vsp1_video_pipeline_build(pipe, video);
 650 }
 651
 652 static struct vsp1_pipeline *vsp1_video_pipeline_get(struct vsp1_video *video)
 653 {
 654         struct vsp1_pipeline *pipe;
 655         int ret;
 656
 657         /*
 658          * Get a pipeline object for the video node. If a pipeline has already
 659          * been allocated just increment its reference count and return it.
 660          * Otherwise allocate a new pipeline and initialize it, it will be freed
 661          * when the last reference is released.
 662          */
 663         if (!video->rwpf->pipe) {
 664                 pipe = kzalloc(sizeof(*pipe), GFP_KERNEL);
 665                 if (!pipe)
 666                         return ERR_PTR(-ENOMEM);
 667
 668                 ret = vsp1_video_pipeline_init(pipe, video);
 669                 if (ret < 0) {
 670                         vsp1_pipeline_reset(pipe);
 671                         kfree(pipe);
 672                         return ERR_PTR(ret);
 673                 }
 674         } else {
 675                 pipe = video->rwpf->pipe;
 676                 kref_get(&pipe->kref);
 677         }
 678
 679         return pipe;
 680 }
 681
 682 static void vsp1_video_pipeline_release(struct kref *kref)
 683 {
 684         struct vsp1_pipeline *pipe = container_of(kref, typeof(*pipe), kref);
 685
 686         vsp1_pipeline_reset(pipe);
 687         kfree(pipe);
 688 }
 689
 690 static void vsp1_video_pipeline_put(struct vsp1_pipeline *pipe)
 691 {
 692         struct media_device *mdev = &pipe->output->entity.vsp1->media_dev;
 693
 694         mutex_lock(&mdev->graph_mutex);
 695         kref_put(&pipe->kref, vsp1_video_pipeline_release);
 696         mutex_unlock(&mdev->graph_mutex);
 697 }
 698
 699 /* -----------------------------------------------------------------------------
 700  * videobuf2 Queue Operations
 701  */
 702
 703 static int
 704 vsp1_video_queue_setup(struct vb2_queue *vq,
 705                        unsigned int *nbuffers, unsigned int *nplanes,
 706                        unsigned int sizes[], struct device *alloc_devs[])
 707 {
 708         struct vsp1_video *video = vb2_get_drv_priv(vq);
 709         const struct v4l2_pix_format_mplane *format = &video->rwpf->format;
 710         unsigned int i;
 711
 712         if (*nplanes) {
 713                 if (*nplanes != format->num_planes)
 714                         return -EINVAL;
 715
 716                 for (i = 0; i < *nplanes; i++)
 717                         if (sizes[i] < format->plane_fmt[i].sizeimage)
 718                                 return -EINVAL;
 719                 return 0;
 720         }
 721
 722         *nplanes = format->num_planes;
 723
 724         for (i = 0; i < format->num_planes; ++i)
 725                 sizes[i] = format->plane_fmt[i].sizeimage;
 726
 727         return 0;
 728 }
 729
 730 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
 731 {
 732         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 733         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 734         struct vsp1_vb2_buffer *buf = to_vsp1_vb2_buffer(vbuf);
 735         const struct v4l2_pix_format_mplane *format = &video->rwpf->format;
 736         unsigned int i;
 737
 738         if (vb->num_planes < format->num_planes)
 739                 return -EINVAL;
 740
 741         for (i = 0; i < vb->num_planes; ++i) {
 742                 buf->mem.addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 743
 744                 if (vb2_plane_size(vb, i) < format->plane_fmt[i].sizeimage)
 745                         return -EINVAL;
 746         }
 747
 748         for ( ; i < 3; ++i)
 749                 buf->mem.addr[i] = 0;
 750
 751         return 0;
 752 }
 753
 754 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
 755 {
 756         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 757         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 758         struct vsp1_pipeline *pipe = video->rwpf->pipe;
 759         struct vsp1_vb2_buffer *buf = to_vsp1_vb2_buffer(vbuf);
 760         unsigned long flags;
 761         bool empty;
 762
 763         spin_lock_irqsave(&video->irqlock, flags);
 764         empty = list_empty(&video->irqqueue);
 765         list_add_tail(&buf->queue, &video->irqqueue);
 766         spin_unlock_irqrestore(&video->irqlock, flags);
 767
 768         if (!empty)
 769                 return;
 770
 771         spin_lock_irqsave(&pipe->irqlock, flags);
 772
 773         video->rwpf->mem = buf->mem;
 774         pipe->buffers_ready |= 1 << video->pipe_index;
 775
 776         if (vb2_is_streaming(&video->queue) &&
 777             vsp1_pipeline_ready(pipe))
 778                 vsp1_video_pipeline_run(pipe);
 779
 780         spin_unlock_irqrestore(&pipe->irqlock, flags);
 781 }
 782
 783 static int vsp1_video_setup_pipeline(struct vsp1_pipeline *pipe)
 784 {
 785         struct vsp1_entity *entity;
 786
 787         /* Determine this pipelines sizes for image partitioning support. */
 788         vsp1_video_pipeline_setup_partitions(pipe);
 789
 790         /* Prepare the display list. */
 791         pipe->dl = vsp1_dl_list_get(pipe->output->dlm);
 792         if (!pipe->dl)
 793                 return -ENOMEM;
 794
 795         if (pipe->uds) {
 796                 struct vsp1_uds *uds = to_uds(&pipe->uds->subdev);
 797
 798                 /*
 799                  * If a BRU is present in the pipeline before the UDS, the alpha
 800                  * component doesn't need to be scaled as the BRU output alpha
 801                  * value is fixed to 255. Otherwise we need to scale the alpha
 802                  * component only when available at the input RPF.
 803                  */
 804                 if (pipe->uds_input->type == VSP1_ENTITY_BRU) {
 805                         uds->scale_alpha = false;
 806                 } else {
 807                         struct vsp1_rwpf *rpf =
 808                                 to_rwpf(&pipe->uds_input->subdev);
 809
 810                         uds->scale_alpha = rpf->fmtinfo->alpha;
 811                 }
 812         }
 813
 814         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 815                 vsp1_entity_route_setup(entity, pipe, pipe->dl);
 816
 817                 if (entity->ops->configure)
 818                         entity->ops->configure(entity, pipe, pipe->dl,
 819                                                VSP1_ENTITY_PARAMS_INIT);
 820         }
 821
 822         return 0;
 823 }
 824
 825 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 826 {
 827         struct vsp1_video *video = vb2_get_drv_priv(vq);
 828         struct vsp1_pipeline *pipe = video->rwpf->pipe;
 829         bool start_pipeline = false;
 830         unsigned long flags;
 831         int ret;
 832
 833         mutex_lock(&pipe->lock);
 834         if (pipe->stream_count == pipe->num_inputs) {
 835                 ret = vsp1_video_setup_pipeline(pipe);
 836                 if (ret < 0) {
 837                         mutex_unlock(&pipe->lock);
 838                         return ret;
 839                 }
 840
 841                 start_pipeline = true;
 842         }
 843
 844         pipe->stream_count++;
 845         mutex_unlock(&pipe->lock);
 846
 847         /*
 848          * vsp1_pipeline_ready() is not sufficient to establish that all streams
 849          * are prepared and the pipeline is configured, as multiple streams
 850          * can race through streamon with buffers already queued; Therefore we
 851          * don't even attempt to start the pipeline until the last stream has
 852          * called through here.
 853          */
 854         if (!start_pipeline)
 855                 return 0;
 856
 857         spin_lock_irqsave(&pipe->irqlock, flags);
 858         if (vsp1_pipeline_ready(pipe))
 859                 vsp1_video_pipeline_run(pipe);
 860         spin_unlock_irqrestore(&pipe->irqlock, flags);
 861
 862         return 0;
 863 }
 864
 865 static void vsp1_video_stop_streaming(struct vb2_queue *vq)
 866 {
 867         struct vsp1_video *video = vb2_get_drv_priv(vq);
 868         struct vsp1_pipeline *pipe = video->rwpf->pipe;
 869         struct vsp1_vb2_buffer *buffer;
 870         unsigned long flags;
 871         int ret;
 872
 873         /*
 874          * Clear the buffers ready flag to make sure the device won't be started
 875          * by a QBUF on the video node on the other side of the pipeline.
 876          */
 877         spin_lock_irqsave(&video->irqlock, flags);
 878         pipe->buffers_ready &= ~(1 << video->pipe_index);
 879         spin_unlock_irqrestore(&video->irqlock, flags);
 880
 881         mutex_lock(&pipe->lock);
 882         if (--pipe->stream_count == pipe->num_inputs) {
 883                 /* Stop the pipeline. */
 884                 ret = vsp1_pipeline_stop(pipe);
 885                 if (ret == -ETIMEDOUT)
 886                         dev_err(video->vsp1->dev, "pipeline stop timeout\n");
 887
 888                 vsp1_dl_list_put(pipe->dl);
 889                 pipe->dl = NULL;
 890         }
 891         mutex_unlock(&pipe->lock);
 892
 893         media_pipeline_stop(&video->video.entity);
 894         vsp1_video_pipeline_put(pipe);
 895
 896         /* Remove all buffers from the IRQ queue. */
 897         spin_lock_irqsave(&video->irqlock, flags);
 898         list_for_each_entry(buffer, &video->irqqueue, queue)
 899                 vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR);
 900         INIT_LIST_HEAD(&video->irqqueue);
 901         spin_unlock_irqrestore(&video->irqlock, flags);
 902 }
 903
 904 static const struct vb2_ops vsp1_video_queue_qops = {
 905         .queue_setup = vsp1_video_queue_setup,
 906         .buf_prepare = vsp1_video_buffer_prepare,
 907         .buf_queue = vsp1_video_buffer_queue,
 908         .wait_prepare = vb2_ops_wait_prepare,
 909         .wait_finish = vb2_ops_wait_finish,
 910         .start_streaming = vsp1_video_start_streaming,
 911         .stop_streaming = vsp1_video_stop_streaming,
 912 };
 913
 914 /* -----------------------------------------------------------------------------
 915  * V4L2 ioctls
 916  */
 917
 918 static int
 919 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 920 {
 921         struct v4l2_fh *vfh = file->private_data;
 922         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 923
 924         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
 925                           | V4L2_CAP_VIDEO_CAPTURE_MPLANE
 926                           | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
 927
 928         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 929                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
 930                                  | V4L2_CAP_STREAMING;
 931         else
 932                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
 933                                  | V4L2_CAP_STREAMING;
 934
 935         strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
 936         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 937         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 938                  dev_name(video->vsp1->dev));
 939
 940         return 0;
 941 }
 942
 943 static int
 944 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 945 {
 946         struct v4l2_fh *vfh = file->private_data;
 947         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 948
 949         if (format->type != video->queue.type)
 950                 return -EINVAL;
 951
 952         mutex_lock(&video->lock);
 953         format->fmt.pix_mp = video->rwpf->format;
 954         mutex_unlock(&video->lock);
 955
 956         return 0;
 957 }
 958
 959 static int
 960 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 961 {
 962         struct v4l2_fh *vfh = file->private_data;
 963         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 964
 965         if (format->type != video->queue.type)
 966                 return -EINVAL;
 967
 968         return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
 969 }
 970
 971 static int
 972 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 973 {
 974         struct v4l2_fh *vfh = file->private_data;
 975         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 976         const struct vsp1_format_info *info;
 977         int ret;
 978
 979         if (format->type != video->queue.type)
 980                 return -EINVAL;
 981
 982         ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
 983         if (ret < 0)
 984                 return ret;
 985
 986         mutex_lock(&video->lock);
 987
 988         if (vb2_is_busy(&video->queue)) {
 989                 ret = -EBUSY;
 990                 goto done;
 991         }
 992
 993         video->rwpf->format = format->fmt.pix_mp;
 994         video->rwpf->fmtinfo = info;
 995
 996 done:
 997         mutex_unlock(&video->lock);
 998         return ret;
 999 }
1000
1001 static int
1002 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1003 {
1004         struct v4l2_fh *vfh = file->private_data;
1005         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1006         struct media_device *mdev = &video->vsp1->media_dev;
1007         struct vsp1_pipeline *pipe;
1008         int ret;
1009
1010         if (video->queue.owner && video->queue.owner != file->private_data)
1011                 return -EBUSY;
1012
1013         /*
1014          * Get a pipeline for the video node and start streaming on it. No link
1015          * touching an entity in the pipeline can be activated or deactivated
1016          * once streaming is started.
1017          */
1018         mutex_lock(&mdev->graph_mutex);
1019
1020         pipe = vsp1_video_pipeline_get(video);
1021         if (IS_ERR(pipe)) {
1022                 mutex_unlock(&mdev->graph_mutex);
1023                 return PTR_ERR(pipe);
1024         }
1025
1026         ret = __media_pipeline_start(&video->video.entity, &pipe->pipe);
1027         if (ret < 0) {
1028                 mutex_unlock(&mdev->graph_mutex);
1029                 goto err_pipe;
1030         }
1031
1032         mutex_unlock(&mdev->graph_mutex);
1033
1034         /*
1035          * Verify that the configured format matches the output of the connected
1036          * subdev.
1037          */
1038         ret = vsp1_video_verify_format(video);
1039         if (ret < 0)
1040                 goto err_stop;
1041
1042         /* Start the queue. */
1043         ret = vb2_streamon(&video->queue, type);
1044         if (ret < 0)
1045                 goto err_stop;
1046
1047         return 0;
1048
1049 err_stop:
1050         media_pipeline_stop(&video->video.entity);
1051 err_pipe:
1052         vsp1_video_pipeline_put(pipe);
1053         return ret;
1054 }
1055
1056 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
1057         .vidioc_querycap                = vsp1_video_querycap,
1058         .vidioc_g_fmt_vid_cap_mplane    = vsp1_video_get_format,
1059         .vidioc_s_fmt_vid_cap_mplane    = vsp1_video_set_format,
1060         .vidioc_try_fmt_vid_cap_mplane  = vsp1_video_try_format,
1061         .vidioc_g_fmt_vid_out_mplane    = vsp1_video_get_format,
1062         .vidioc_s_fmt_vid_out_mplane    = vsp1_video_set_format,
1063         .vidioc_try_fmt_vid_out_mplane  = vsp1_video_try_format,
1064         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1065         .vidioc_querybuf                = vb2_ioctl_querybuf,
1066         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1067         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1068         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1069         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1070         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
1071         .vidioc_streamon                = vsp1_video_streamon,
1072         .vidioc_streamoff               = vb2_ioctl_streamoff,
1073 };
1074
1075 /* -----------------------------------------------------------------------------
1076  * V4L2 File Operations
1077  */
1078
1079 static int vsp1_video_open(struct file *file)
1080 {
1081         struct vsp1_video *video = video_drvdata(file);
1082         struct v4l2_fh *vfh;
1083         int ret = 0;
1084
1085         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
1086         if (vfh == NULL)
1087                 return -ENOMEM;
1088
1089         v4l2_fh_init(vfh, &video->video);
1090         v4l2_fh_add(vfh);
1091
1092         file->private_data = vfh;
1093
1094         ret = vsp1_device_get(video->vsp1);
1095         if (ret < 0) {
1096                 v4l2_fh_del(vfh);
1097                 v4l2_fh_exit(vfh);
1098                 kfree(vfh);
1099         }
1100
1101         return ret;
1102 }
1103
1104 static int vsp1_video_release(struct file *file)
1105 {
1106         struct vsp1_video *video = video_drvdata(file);
1107         struct v4l2_fh *vfh = file->private_data;
1108
1109         mutex_lock(&video->lock);
1110         if (video->queue.owner == vfh) {
1111                 vb2_queue_release(&video->queue);
1112                 video->queue.owner = NULL;
1113         }
1114         mutex_unlock(&video->lock);
1115
1116         vsp1_device_put(video->vsp1);
1117
1118         v4l2_fh_release(file);
1119
1120         file->private_data = NULL;
1121
1122         return 0;
1123 }
1124
1125 static const struct v4l2_file_operations vsp1_video_fops = {
1126         .owner = THIS_MODULE,
1127         .unlocked_ioctl = video_ioctl2,
1128         .open = vsp1_video_open,
1129         .release = vsp1_video_release,
1130         .poll = vb2_fop_poll,
1131         .mmap = vb2_fop_mmap,
1132 };
1133
1134 /* -----------------------------------------------------------------------------
1135  * Initialization and Cleanup
1136  */
1137
1138 struct vsp1_video *vsp1_video_create(struct vsp1_device *vsp1,
1139                                      struct vsp1_rwpf *rwpf)
1140 {
1141         struct vsp1_video *video;
1142         const char *direction;
1143         int ret;
1144
1145         video = devm_kzalloc(vsp1->dev, sizeof(*video), GFP_KERNEL);
1146         if (!video)
1147                 return ERR_PTR(-ENOMEM);
1148
1149         rwpf->video = video;
1150
1151         video->vsp1 = vsp1;
1152         video->rwpf = rwpf;
1153
1154         if (rwpf->entity.type == VSP1_ENTITY_RPF) {
1155                 direction = "input";
1156                 video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
1157                 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1158                 video->video.vfl_dir = VFL_DIR_TX;
1159         } else {
1160                 direction = "output";
1161                 video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1162                 video->pad.flags = MEDIA_PAD_FL_SINK;
1163                 video->video.vfl_dir = VFL_DIR_RX;
1164         }
1165
1166         mutex_init(&video->lock);
1167         spin_lock_init(&video->irqlock);
1168         INIT_LIST_HEAD(&video->irqqueue);
1169
1170         /* Initialize the media entity... */
1171         ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
1172         if (ret < 0)
1173                 return ERR_PTR(ret);
1174
1175         /* ... and the format ... */
1176         rwpf->format.pixelformat = VSP1_VIDEO_DEF_FORMAT;
1177         rwpf->format.width = VSP1_VIDEO_DEF_WIDTH;
1178         rwpf->format.height = VSP1_VIDEO_DEF_HEIGHT;
1179         __vsp1_video_try_format(video, &rwpf->format, &rwpf->fmtinfo);
1180
1181         /* ... and the video node... */
1182         video->video.v4l2_dev = &video->vsp1->v4l2_dev;
1183         video->video.fops = &vsp1_video_fops;
1184         snprintf(video->video.name, sizeof(video->video.name), "%s %s",
1185                  rwpf->entity.subdev.name, direction);
1186         video->video.vfl_type = VFL_TYPE_GRABBER;
1187         video->video.release = video_device_release_empty;
1188         video->video.ioctl_ops = &vsp1_video_ioctl_ops;
1189
1190         video_set_drvdata(&video->video, video);
1191
1192         video->queue.type = video->type;
1193         video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1194         video->queue.lock = &video->lock;
1195         video->queue.drv_priv = video;
1196         video->queue.buf_struct_size = sizeof(struct vsp1_vb2_buffer);
1197         video->queue.ops = &vsp1_video_queue_qops;
1198         video->queue.mem_ops = &vb2_dma_contig_memops;
1199         video->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1200         video->queue.dev = video->vsp1->bus_master;
1201         ret = vb2_queue_init(&video->queue);
1202         if (ret < 0) {
1203                 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
1204                 goto error;
1205         }
1206
1207         /* ... and register the video device. */
1208         video->video.queue = &video->queue;
1209         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1210         if (ret < 0) {
1211                 dev_err(video->vsp1->dev, "failed to register video device\n");
1212                 goto error;
1213         }
1214
1215         return video;
1216
1217 error:
1218         vsp1_video_cleanup(video);
1219         return ERR_PTR(ret);
1220 }
1221
1222 void vsp1_video_cleanup(struct vsp1_video *video)
1223 {
1224         if (video_is_registered(&video->video))
1225                 video_unregister_device(&video->video);
1226
1227         media_entity_cleanup(&video->video.entity);
1228 }