drivers/media/platform/vsp1/vsp1_video.c

   1 /*
   2  * vsp1_video.c  --  R-Car VSP1 Video Node
   3  *
   4  * Copyright (C) 2013-2014 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/sched.h>
  18 #include <linux/slab.h>
  19 #include <linux/v4l2-mediabus.h>
  20 #include <linux/videodev2.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-core.h>
  28 #include <media/videobuf2-dma-contig.h>
  29
  30 #include "vsp1.h"
  31 #include "vsp1_bru.h"
  32 #include "vsp1_entity.h"
  33 #include "vsp1_rwpf.h"
  34 #include "vsp1_video.h"
  35
  36 #define VSP1_VIDEO_DEF_FORMAT           V4L2_PIX_FMT_YUYV
  37 #define VSP1_VIDEO_DEF_WIDTH            1024
  38 #define VSP1_VIDEO_DEF_HEIGHT           768
  39
  40 #define VSP1_VIDEO_MIN_WIDTH            2U
  41 #define VSP1_VIDEO_MAX_WIDTH            8190U
  42 #define VSP1_VIDEO_MIN_HEIGHT           2U
  43 #define VSP1_VIDEO_MAX_HEIGHT           8190U
  44
  45 /* -----------------------------------------------------------------------------
  46  * Helper functions
  47  */
  48
  49 static const struct vsp1_format_info vsp1_video_formats[] = {
  50         { V4L2_PIX_FMT_RGB332, V4L2_MBUS_FMT_ARGB8888_1X32,
  51           VI6_FMT_RGB_332, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  52           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  53           1, { 8, 0, 0 }, false, false, 1, 1, false },
  54         { V4L2_PIX_FMT_ARGB444, V4L2_MBUS_FMT_ARGB8888_1X32,
  55           VI6_FMT_ARGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  56           VI6_RPF_DSWAP_P_WDS,
  57           1, { 16, 0, 0 }, false, false, 1, 1, true },
  58         { V4L2_PIX_FMT_XRGB444, V4L2_MBUS_FMT_ARGB8888_1X32,
  59           VI6_FMT_XRGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  60           VI6_RPF_DSWAP_P_WDS,
  61           1, { 16, 0, 0 }, false, false, 1, 1, true },
  62         { V4L2_PIX_FMT_ARGB555, V4L2_MBUS_FMT_ARGB8888_1X32,
  63           VI6_FMT_ARGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  64           VI6_RPF_DSWAP_P_WDS,
  65           1, { 16, 0, 0 }, false, false, 1, 1, true },
  66         { V4L2_PIX_FMT_XRGB555, V4L2_MBUS_FMT_ARGB8888_1X32,
  67           VI6_FMT_XRGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  68           VI6_RPF_DSWAP_P_WDS,
  69           1, { 16, 0, 0 }, false, false, 1, 1, false },
  70         { V4L2_PIX_FMT_RGB565, V4L2_MBUS_FMT_ARGB8888_1X32,
  71           VI6_FMT_RGB_565, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  72           VI6_RPF_DSWAP_P_WDS,
  73           1, { 16, 0, 0 }, false, false, 1, 1, false },
  74         { V4L2_PIX_FMT_BGR24, V4L2_MBUS_FMT_ARGB8888_1X32,
  75           VI6_FMT_BGR_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  76           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  77           1, { 24, 0, 0 }, false, false, 1, 1, false },
  78         { V4L2_PIX_FMT_RGB24, V4L2_MBUS_FMT_ARGB8888_1X32,
  79           VI6_FMT_RGB_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  80           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  81           1, { 24, 0, 0 }, false, false, 1, 1, false },
  82         { V4L2_PIX_FMT_ABGR32, V4L2_MBUS_FMT_ARGB8888_1X32,
  83           VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
  84           1, { 32, 0, 0 }, false, false, 1, 1, true },
  85         { V4L2_PIX_FMT_XBGR32, V4L2_MBUS_FMT_ARGB8888_1X32,
  86           VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
  87           1, { 32, 0, 0 }, false, false, 1, 1, false },
  88         { V4L2_PIX_FMT_ARGB32, V4L2_MBUS_FMT_ARGB8888_1X32,
  89           VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  90           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  91           1, { 32, 0, 0 }, false, false, 1, 1, true },
  92         { V4L2_PIX_FMT_XRGB32, V4L2_MBUS_FMT_ARGB8888_1X32,
  93           VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  94           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  95           1, { 32, 0, 0 }, false, false, 1, 1, false },
  96         { V4L2_PIX_FMT_UYVY, V4L2_MBUS_FMT_AYUV8_1X32,
  97           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  98           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  99           1, { 16, 0, 0 }, false, false, 2, 1, false },
 100         { V4L2_PIX_FMT_VYUY, V4L2_MBUS_FMT_AYUV8_1X32,
 101           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 102           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 103           1, { 16, 0, 0 }, false, true, 2, 1, false },
 104         { V4L2_PIX_FMT_YUYV, V4L2_MBUS_FMT_AYUV8_1X32,
 105           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 106           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 107           1, { 16, 0, 0 }, true, false, 2, 1, false },
 108         { V4L2_PIX_FMT_YVYU, V4L2_MBUS_FMT_AYUV8_1X32,
 109           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 110           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 111           1, { 16, 0, 0 }, true, true, 2, 1, false },
 112         { V4L2_PIX_FMT_NV12M, V4L2_MBUS_FMT_AYUV8_1X32,
 113           VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 114           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 115           2, { 8, 16, 0 }, false, false, 2, 2, false },
 116         { V4L2_PIX_FMT_NV21M, V4L2_MBUS_FMT_AYUV8_1X32,
 117           VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 118           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 119           2, { 8, 16, 0 }, false, true, 2, 2, false },
 120         { V4L2_PIX_FMT_NV16M, V4L2_MBUS_FMT_AYUV8_1X32,
 121           VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 122           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 123           2, { 8, 16, 0 }, false, false, 2, 1, false },
 124         { V4L2_PIX_FMT_NV61M, V4L2_MBUS_FMT_AYUV8_1X32,
 125           VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 126           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 127           2, { 8, 16, 0 }, false, true, 2, 1, false },
 128         { V4L2_PIX_FMT_YUV420M, V4L2_MBUS_FMT_AYUV8_1X32,
 129           VI6_FMT_Y_U_V_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 130           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 131           3, { 8, 8, 8 }, false, false, 2, 2, false },
 132 };
 133
 134 /*
 135  * vsp1_get_format_info - Retrieve format information for a 4CC
 136  * @fourcc: the format 4CC
 137  *
 138  * Return a pointer to the format information structure corresponding to the
 139  * given V4L2 format 4CC, or NULL if no corresponding format can be found.
 140  */
 141 static const struct vsp1_format_info *vsp1_get_format_info(u32 fourcc)
 142 {
 143         unsigned int i;
 144
 145         for (i = 0; i < ARRAY_SIZE(vsp1_video_formats); ++i) {
 146                 const struct vsp1_format_info *info = &vsp1_video_formats[i];
 147
 148                 if (info->fourcc == fourcc)
 149                         return info;
 150         }
 151
 152         return NULL;
 153 }
 154
 155
 156 static struct v4l2_subdev *
 157 vsp1_video_remote_subdev(struct media_pad *local, u32 *pad)
 158 {
 159         struct media_pad *remote;
 160
 161         remote = media_entity_remote_pad(local);
 162         if (remote == NULL ||
 163             media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 164                 return NULL;
 165
 166         if (pad)
 167                 *pad = remote->index;
 168
 169         return media_entity_to_v4l2_subdev(remote->entity);
 170 }
 171
 172 static int vsp1_video_verify_format(struct vsp1_video *video)
 173 {
 174         struct v4l2_subdev_format fmt;
 175         struct v4l2_subdev *subdev;
 176         int ret;
 177
 178         subdev = vsp1_video_remote_subdev(&video->pad, &fmt.pad);
 179         if (subdev == NULL)
 180                 return -EINVAL;
 181
 182         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 183         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 184         if (ret < 0)
 185                 return ret == -ENOIOCTLCMD ? -EINVAL : ret;
 186
 187         if (video->fmtinfo->mbus != fmt.format.code ||
 188             video->format.height != fmt.format.height ||
 189             video->format.width != fmt.format.width)
 190                 return -EINVAL;
 191
 192         return 0;
 193 }
 194
 195 static int __vsp1_video_try_format(struct vsp1_video *video,
 196                                    struct v4l2_pix_format_mplane *pix,
 197                                    const struct vsp1_format_info **fmtinfo)
 198 {
 199         static const u32 xrgb_formats[][2] = {
 200                 { V4L2_PIX_FMT_RGB444, V4L2_PIX_FMT_XRGB444 },
 201                 { V4L2_PIX_FMT_RGB555, V4L2_PIX_FMT_XRGB555 },
 202                 { V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_XBGR32 },
 203                 { V4L2_PIX_FMT_RGB32, V4L2_PIX_FMT_XRGB32 },
 204         };
 205
 206         const struct vsp1_format_info *info;
 207         unsigned int width = pix->width;
 208         unsigned int height = pix->height;
 209         unsigned int i;
 210
 211         /* Backward compatibility: replace deprecated RGB formats by their XRGB
 212          * equivalent. This selects the format older userspace applications want
 213          * while still exposing the new format.
 214          */
 215         for (i = 0; i < ARRAY_SIZE(xrgb_formats); ++i) {
 216                 if (xrgb_formats[i][0] == pix->pixelformat) {
 217                         pix->pixelformat = xrgb_formats[i][1];
 218                         break;
 219                 }
 220         }
 221
 222         /* Retrieve format information and select the default format if the
 223          * requested format isn't supported.
 224          */
 225         info = vsp1_get_format_info(pix->pixelformat);
 226         if (info == NULL)
 227                 info = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
 228
 229         pix->pixelformat = info->fourcc;
 230         pix->colorspace = V4L2_COLORSPACE_SRGB;
 231         pix->field = V4L2_FIELD_NONE;
 232         memset(pix->reserved, 0, sizeof(pix->reserved));
 233
 234         /* Align the width and height for YUV 4:2:2 and 4:2:0 formats. */
 235         width = round_down(width, info->hsub);
 236         height = round_down(height, info->vsub);
 237
 238         /* Clamp the width and height. */
 239         pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH);
 240         pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT,
 241                             VSP1_VIDEO_MAX_HEIGHT);
 242
 243         /* Compute and clamp the stride and image size. While not documented in
 244          * the datasheet, strides not aligned to a multiple of 128 bytes result
 245          * in image corruption.
 246          */
 247         for (i = 0; i < max(info->planes, 2U); ++i) {
 248                 unsigned int hsub = i > 0 ? info->hsub : 1;
 249                 unsigned int vsub = i > 0 ? info->vsub : 1;
 250                 unsigned int align = 128;
 251                 unsigned int bpl;
 252
 253                 bpl = clamp_t(unsigned int, pix->plane_fmt[i].bytesperline,
 254                               pix->width / hsub * info->bpp[i] / 8,
 255                               round_down(65535U, align));
 256
 257                 pix->plane_fmt[i].bytesperline = round_up(bpl, align);
 258                 pix->plane_fmt[i].sizeimage = pix->plane_fmt[i].bytesperline
 259                                             * pix->height / vsub;
 260         }
 261
 262         if (info->planes == 3) {
 263                 /* The second and third planes must have the same stride. */
 264                 pix->plane_fmt[2].bytesperline = pix->plane_fmt[1].bytesperline;
 265                 pix->plane_fmt[2].sizeimage = pix->plane_fmt[1].sizeimage;
 266         }
 267
 268         pix->num_planes = info->planes;
 269
 270         if (fmtinfo)
 271                 *fmtinfo = info;
 272
 273         return 0;
 274 }
 275
 276 static bool
 277 vsp1_video_format_adjust(struct vsp1_video *video,
 278                          const struct v4l2_pix_format_mplane *format,
 279                          struct v4l2_pix_format_mplane *adjust)
 280 {
 281         unsigned int i;
 282
 283         *adjust = *format;
 284         __vsp1_video_try_format(video, adjust, NULL);
 285
 286         if (format->width != adjust->width ||
 287             format->height != adjust->height ||
 288             format->pixelformat != adjust->pixelformat ||
 289             format->num_planes != adjust->num_planes)
 290                 return false;
 291
 292         for (i = 0; i < format->num_planes; ++i) {
 293                 if (format->plane_fmt[i].bytesperline !=
 294                     adjust->plane_fmt[i].bytesperline)
 295                         return false;
 296
 297                 adjust->plane_fmt[i].sizeimage =
 298                         max(adjust->plane_fmt[i].sizeimage,
 299                             format->plane_fmt[i].sizeimage);
 300         }
 301
 302         return true;
 303 }
 304
 305 /* -----------------------------------------------------------------------------
 306  * Pipeline Management
 307  */
 308
 309 static int vsp1_pipeline_validate_branch(struct vsp1_rwpf *input,
 310                                          struct vsp1_rwpf *output)
 311 {
 312         struct vsp1_entity *entity;
 313         unsigned int entities = 0;
 314         struct media_pad *pad;
 315         bool uds_found = false;
 316
 317         input->location.left = 0;
 318         input->location.top = 0;
 319
 320         pad = media_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
 321
 322         while (1) {
 323                 if (pad == NULL)
 324                         return -EPIPE;
 325
 326                 /* We've reached a video node, that shouldn't have happened. */
 327                 if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 328                         return -EPIPE;
 329
 330                 entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
 331
 332                 /* A BRU is present in the pipeline, store the compose rectangle
 333                  * location in the input RPF for use when configuring the RPF.
 334                  */
 335                 if (entity->type == VSP1_ENTITY_BRU) {
 336                         struct vsp1_bru *bru = to_bru(&entity->subdev);
 337                         struct v4l2_rect *rect =
 338                                 &bru->inputs[pad->index].compose;
 339
 340                         bru->inputs[pad->index].rpf = input;
 341
 342                         input->location.left = rect->left;
 343                         input->location.top = rect->top;
 344                 }
 345
 346                 /* We've reached the WPF, we're done. */
 347                 if (entity->type == VSP1_ENTITY_WPF)
 348                         break;
 349
 350                 /* Ensure the branch has no loop. */
 351                 if (entities & (1 << entity->subdev.entity.id))
 352                         return -EPIPE;
 353
 354                 entities |= 1 << entity->subdev.entity.id;
 355
 356                 /* UDS can't be chained. */
 357                 if (entity->type == VSP1_ENTITY_UDS) {
 358                         if (uds_found)
 359                                 return -EPIPE;
 360                         uds_found = true;
 361                 }
 362
 363                 /* Follow the source link. The link setup operations ensure
 364                  * that the output fan-out can't be more than one, there is thus
 365                  * no need to verify here that only a single source link is
 366                  * activated.
 367                  */
 368                 pad = &entity->pads[entity->source_pad];
 369                 pad = media_entity_remote_pad(pad);
 370         }
 371
 372         /* The last entity must be the output WPF. */
 373         if (entity != &output->entity)
 374                 return -EPIPE;
 375
 376         return 0;
 377 }
 378
 379 static void __vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
 380 {
 381         if (pipe->bru) {
 382                 struct vsp1_bru *bru = to_bru(&pipe->bru->subdev);
 383                 unsigned int i;
 384
 385                 for (i = 0; i < ARRAY_SIZE(bru->inputs); ++i)
 386                         bru->inputs[i].rpf = NULL;
 387         }
 388
 389         INIT_LIST_HEAD(&pipe->entities);
 390         pipe->state = VSP1_PIPELINE_STOPPED;
 391         pipe->buffers_ready = 0;
 392         pipe->num_video = 0;
 393         pipe->num_inputs = 0;
 394         pipe->output = NULL;
 395         pipe->bru = NULL;
 396         pipe->lif = NULL;
 397 }
 398
 399 static int vsp1_pipeline_validate(struct vsp1_pipeline *pipe,
 400                                   struct vsp1_video *video)
 401 {
 402         struct media_entity_graph graph;
 403         struct media_entity *entity = &video->video.entity;
 404         struct media_device *mdev = entity->parent;
 405         unsigned int i;
 406         int ret;
 407
 408         mutex_lock(&mdev->graph_mutex);
 409
 410         /* Walk the graph to locate the entities and video nodes. */
 411         media_entity_graph_walk_start(&graph, entity);
 412
 413         while ((entity = media_entity_graph_walk_next(&graph))) {
 414                 struct v4l2_subdev *subdev;
 415                 struct vsp1_rwpf *rwpf;
 416                 struct vsp1_entity *e;
 417
 418                 if (media_entity_type(entity) != MEDIA_ENT_T_V4L2_SUBDEV) {
 419                         pipe->num_video++;
 420                         continue;
 421                 }
 422
 423                 subdev = media_entity_to_v4l2_subdev(entity);
 424                 e = to_vsp1_entity(subdev);
 425                 list_add_tail(&e->list_pipe, &pipe->entities);
 426
 427                 if (e->type == VSP1_ENTITY_RPF) {
 428                         rwpf = to_rwpf(subdev);
 429                         pipe->inputs[pipe->num_inputs++] = rwpf;
 430                         rwpf->video.pipe_index = pipe->num_inputs;
 431                 } else if (e->type == VSP1_ENTITY_WPF) {
 432                         rwpf = to_rwpf(subdev);
 433                         pipe->output = to_rwpf(subdev);
 434                         rwpf->video.pipe_index = 0;
 435                 } else if (e->type == VSP1_ENTITY_LIF) {
 436                         pipe->lif = e;
 437                 } else if (e->type == VSP1_ENTITY_BRU) {
 438                         pipe->bru = e;
 439                 }
 440         }
 441
 442         mutex_unlock(&mdev->graph_mutex);
 443
 444         /* We need one output and at least one input. */
 445         if (pipe->num_inputs == 0 || !pipe->output) {
 446                 ret = -EPIPE;
 447                 goto error;
 448         }
 449
 450         /* Follow links downstream for each input and make sure the graph
 451          * contains no loop and that all branches end at the output WPF.
 452          */
 453         for (i = 0; i < pipe->num_inputs; ++i) {
 454                 ret = vsp1_pipeline_validate_branch(pipe->inputs[i],
 455                                                     pipe->output);
 456                 if (ret < 0)
 457                         goto error;
 458         }
 459
 460         return 0;
 461
 462 error:
 463         __vsp1_pipeline_cleanup(pipe);
 464         return ret;
 465 }
 466
 467 static int vsp1_pipeline_init(struct vsp1_pipeline *pipe,
 468                               struct vsp1_video *video)
 469 {
 470         int ret;
 471
 472         mutex_lock(&pipe->lock);
 473
 474         /* If we're the first user validate and initialize the pipeline. */
 475         if (pipe->use_count == 0) {
 476                 ret = vsp1_pipeline_validate(pipe, video);
 477                 if (ret < 0)
 478                         goto done;
 479         }
 480
 481         pipe->use_count++;
 482         ret = 0;
 483
 484 done:
 485         mutex_unlock(&pipe->lock);
 486         return ret;
 487 }
 488
 489 static void vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
 490 {
 491         mutex_lock(&pipe->lock);
 492
 493         /* If we're the last user clean up the pipeline. */
 494         if (--pipe->use_count == 0)
 495                 __vsp1_pipeline_cleanup(pipe);
 496
 497         mutex_unlock(&pipe->lock);
 498 }
 499
 500 static void vsp1_pipeline_run(struct vsp1_pipeline *pipe)
 501 {
 502         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 503
 504         vsp1_write(vsp1, VI6_CMD(pipe->output->entity.index), VI6_CMD_STRCMD);
 505         pipe->state = VSP1_PIPELINE_RUNNING;
 506         pipe->buffers_ready = 0;
 507 }
 508
 509 static int vsp1_pipeline_stop(struct vsp1_pipeline *pipe)
 510 {
 511         struct vsp1_entity *entity;
 512         unsigned long flags;
 513         int ret;
 514
 515         spin_lock_irqsave(&pipe->irqlock, flags);
 516         if (pipe->state == VSP1_PIPELINE_RUNNING)
 517                 pipe->state = VSP1_PIPELINE_STOPPING;
 518         spin_unlock_irqrestore(&pipe->irqlock, flags);
 519
 520         ret = wait_event_timeout(pipe->wq, pipe->state == VSP1_PIPELINE_STOPPED,
 521                                  msecs_to_jiffies(500));
 522         ret = ret == 0 ? -ETIMEDOUT : 0;
 523
 524         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 525                 if (entity->route && entity->route->reg)
 526                         vsp1_write(entity->vsp1, entity->route->reg,
 527                                    VI6_DPR_NODE_UNUSED);
 528
 529                 v4l2_subdev_call(&entity->subdev, video, s_stream, 0);
 530         }
 531
 532         return ret;
 533 }
 534
 535 static bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe)
 536 {
 537         unsigned int mask;
 538
 539         mask = ((1 << pipe->num_inputs) - 1) << 1;
 540         if (!pipe->lif)
 541                 mask |= 1 << 0;
 542
 543         return pipe->buffers_ready == mask;
 544 }
 545
 546 /*
 547  * vsp1_video_complete_buffer - Complete the current buffer
 548  * @video: the video node
 549  *
 550  * This function completes the current buffer by filling its sequence number,
 551  * time stamp and payload size, and hands it back to the videobuf core.
 552  *
 553  * When operating in DU output mode (deep pipeline to the DU through the LIF),
 554  * the VSP1 needs to constantly supply frames to the display. In that case, if
 555  * no other buffer is queued, reuse the one that has just been processed instead
 556  * of handing it back to the videobuf core.
 557  *
 558  * Return the next queued buffer or NULL if the queue is empty.
 559  */
 560 static struct vsp1_video_buffer *
 561 vsp1_video_complete_buffer(struct vsp1_video *video)
 562 {
 563         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 564         struct vsp1_video_buffer *next = NULL;
 565         struct vsp1_video_buffer *done;
 566         unsigned long flags;
 567         unsigned int i;
 568
 569         spin_lock_irqsave(&video->irqlock, flags);
 570
 571         if (list_empty(&video->irqqueue)) {
 572                 spin_unlock_irqrestore(&video->irqlock, flags);
 573                 return NULL;
 574         }
 575
 576         done = list_first_entry(&video->irqqueue,
 577                                 struct vsp1_video_buffer, queue);
 578
 579         /* In DU output mode reuse the buffer if the list is singular. */
 580         if (pipe->lif && list_is_singular(&video->irqqueue)) {
 581                 spin_unlock_irqrestore(&video->irqlock, flags);
 582                 return done;
 583         }
 584
 585         list_del(&done->queue);
 586
 587         if (!list_empty(&video->irqqueue))
 588                 next = list_first_entry(&video->irqqueue,
 589                                         struct vsp1_video_buffer, queue);
 590
 591         spin_unlock_irqrestore(&video->irqlock, flags);
 592
 593         done->buf.v4l2_buf.sequence = video->sequence++;
 594         v4l2_get_timestamp(&done->buf.v4l2_buf.timestamp);
 595         for (i = 0; i < done->buf.num_planes; ++i)
 596                 vb2_set_plane_payload(&done->buf, i, done->length[i]);
 597         vb2_buffer_done(&done->buf, VB2_BUF_STATE_DONE);
 598
 599         return next;
 600 }
 601
 602 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
 603                                  struct vsp1_video *video)
 604 {
 605         struct vsp1_video_buffer *buf;
 606         unsigned long flags;
 607
 608         buf = vsp1_video_complete_buffer(video);
 609         if (buf == NULL)
 610                 return;
 611
 612         spin_lock_irqsave(&pipe->irqlock, flags);
 613
 614         video->ops->queue(video, buf);
 615         pipe->buffers_ready |= 1 << video->pipe_index;
 616
 617         spin_unlock_irqrestore(&pipe->irqlock, flags);
 618 }
 619
 620 void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
 621 {
 622         enum vsp1_pipeline_state state;
 623         unsigned long flags;
 624         unsigned int i;
 625
 626         if (pipe == NULL)
 627                 return;
 628
 629         /* Complete buffers on all video nodes. */
 630         for (i = 0; i < pipe->num_inputs; ++i)
 631                 vsp1_video_frame_end(pipe, &pipe->inputs[i]->video);
 632
 633         if (!pipe->lif)
 634                 vsp1_video_frame_end(pipe, &pipe->output->video);
 635
 636         spin_lock_irqsave(&pipe->irqlock, flags);
 637
 638         state = pipe->state;
 639         pipe->state = VSP1_PIPELINE_STOPPED;
 640
 641         /* If a stop has been requested, mark the pipeline as stopped and
 642          * return.
 643          */
 644         if (state == VSP1_PIPELINE_STOPPING) {
 645                 wake_up(&pipe->wq);
 646                 goto done;
 647         }
 648
 649         /* Restart the pipeline if ready. */
 650         if (vsp1_pipeline_ready(pipe))
 651                 vsp1_pipeline_run(pipe);
 652
 653 done:
 654         spin_unlock_irqrestore(&pipe->irqlock, flags);
 655 }
 656
 657 /* -----------------------------------------------------------------------------
 658  * videobuf2 Queue Operations
 659  */
 660
 661 static int
 662 vsp1_video_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 663                      unsigned int *nbuffers, unsigned int *nplanes,
 664                      unsigned int sizes[], void *alloc_ctxs[])
 665 {
 666         struct vsp1_video *video = vb2_get_drv_priv(vq);
 667         const struct v4l2_pix_format_mplane *format;
 668         struct v4l2_pix_format_mplane pix_mp;
 669         unsigned int i;
 670
 671         if (fmt) {
 672                 /* Make sure the format is valid and adjust the sizeimage field
 673                  * if needed.
 674                  */
 675                 if (!vsp1_video_format_adjust(video, &fmt->fmt.pix_mp, &pix_mp))
 676                         return -EINVAL;
 677
 678                 format = &pix_mp;
 679         } else {
 680                 format = &video->format;
 681         }
 682
 683         *nplanes = format->num_planes;
 684
 685         for (i = 0; i < format->num_planes; ++i) {
 686                 sizes[i] = format->plane_fmt[i].sizeimage;
 687                 alloc_ctxs[i] = video->alloc_ctx;
 688         }
 689
 690         return 0;
 691 }
 692
 693 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
 694 {
 695         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 696         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
 697         const struct v4l2_pix_format_mplane *format = &video->format;
 698         unsigned int i;
 699
 700         if (vb->num_planes < format->num_planes)
 701                 return -EINVAL;
 702
 703         for (i = 0; i < vb->num_planes; ++i) {
 704                 buf->addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 705                 buf->length[i] = vb2_plane_size(vb, i);
 706
 707                 if (buf->length[i] < format->plane_fmt[i].sizeimage)
 708                         return -EINVAL;
 709         }
 710
 711         return 0;
 712 }
 713
 714 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
 715 {
 716         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 717         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 718         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
 719         unsigned long flags;
 720         bool empty;
 721
 722         spin_lock_irqsave(&video->irqlock, flags);
 723         empty = list_empty(&video->irqqueue);
 724         list_add_tail(&buf->queue, &video->irqqueue);
 725         spin_unlock_irqrestore(&video->irqlock, flags);
 726
 727         if (!empty)
 728                 return;
 729
 730         spin_lock_irqsave(&pipe->irqlock, flags);
 731
 732         video->ops->queue(video, buf);
 733         pipe->buffers_ready |= 1 << video->pipe_index;
 734
 735         if (vb2_is_streaming(&video->queue) &&
 736             vsp1_pipeline_ready(pipe))
 737                 vsp1_pipeline_run(pipe);
 738
 739         spin_unlock_irqrestore(&pipe->irqlock, flags);
 740 }
 741
 742 static void vsp1_entity_route_setup(struct vsp1_entity *source)
 743 {
 744         struct vsp1_entity *sink;
 745
 746         if (source->route->reg == 0)
 747                 return;
 748
 749         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
 750         vsp1_write(source->vsp1, source->route->reg,
 751                    sink->route->inputs[source->sink_pad]);
 752 }
 753
 754 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 755 {
 756         struct vsp1_video *video = vb2_get_drv_priv(vq);
 757         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 758         struct vsp1_entity *entity;
 759         unsigned long flags;
 760         int ret;
 761
 762         mutex_lock(&pipe->lock);
 763         if (pipe->stream_count == pipe->num_video - 1) {
 764                 list_for_each_entry(entity, &pipe->entities, list_pipe) {
 765                         vsp1_entity_route_setup(entity);
 766
 767                         ret = v4l2_subdev_call(&entity->subdev, video,
 768                                                s_stream, 1);
 769                         if (ret < 0) {
 770                                 mutex_unlock(&pipe->lock);
 771                                 return ret;
 772                         }
 773                 }
 774         }
 775
 776         pipe->stream_count++;
 777         mutex_unlock(&pipe->lock);
 778
 779         spin_lock_irqsave(&pipe->irqlock, flags);
 780         if (vsp1_pipeline_ready(pipe))
 781                 vsp1_pipeline_run(pipe);
 782         spin_unlock_irqrestore(&pipe->irqlock, flags);
 783
 784         return 0;
 785 }
 786
 787 static int vsp1_video_stop_streaming(struct vb2_queue *vq)
 788 {
 789         struct vsp1_video *video = vb2_get_drv_priv(vq);
 790         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 791         struct vsp1_video_buffer *buffer;
 792         unsigned long flags;
 793         int ret;
 794
 795         mutex_lock(&pipe->lock);
 796         if (--pipe->stream_count == 0) {
 797                 /* Stop the pipeline. */
 798                 ret = vsp1_pipeline_stop(pipe);
 799                 if (ret == -ETIMEDOUT)
 800                         dev_err(video->vsp1->dev, "pipeline stop timeout\n");
 801         }
 802         mutex_unlock(&pipe->lock);
 803
 804         vsp1_pipeline_cleanup(pipe);
 805         media_entity_pipeline_stop(&video->video.entity);
 806
 807         /* Remove all buffers from the IRQ queue. */
 808         spin_lock_irqsave(&video->irqlock, flags);
 809         list_for_each_entry(buffer, &video->irqqueue, queue)
 810                 vb2_buffer_done(&buffer->buf, VB2_BUF_STATE_ERROR);
 811         INIT_LIST_HEAD(&video->irqqueue);
 812         spin_unlock_irqrestore(&video->irqlock, flags);
 813
 814         return 0;
 815 }
 816
 817 static struct vb2_ops vsp1_video_queue_qops = {
 818         .queue_setup = vsp1_video_queue_setup,
 819         .buf_prepare = vsp1_video_buffer_prepare,
 820         .buf_queue = vsp1_video_buffer_queue,
 821         .wait_prepare = vb2_ops_wait_prepare,
 822         .wait_finish = vb2_ops_wait_finish,
 823         .start_streaming = vsp1_video_start_streaming,
 824         .stop_streaming = vsp1_video_stop_streaming,
 825 };
 826
 827 /* -----------------------------------------------------------------------------
 828  * V4L2 ioctls
 829  */
 830
 831 static int
 832 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 833 {
 834         struct v4l2_fh *vfh = file->private_data;
 835         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 836
 837         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
 838                           | V4L2_CAP_VIDEO_CAPTURE_MPLANE
 839                           | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
 840
 841         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 842                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
 843                                  | V4L2_CAP_STREAMING;
 844         else
 845                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
 846                                  | V4L2_CAP_STREAMING;
 847
 848         strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
 849         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 850         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 851                  dev_name(video->vsp1->dev));
 852
 853         return 0;
 854 }
 855
 856 static int
 857 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 858 {
 859         struct v4l2_fh *vfh = file->private_data;
 860         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 861
 862         if (format->type != video->queue.type)
 863                 return -EINVAL;
 864
 865         mutex_lock(&video->lock);
 866         format->fmt.pix_mp = video->format;
 867         mutex_unlock(&video->lock);
 868
 869         return 0;
 870 }
 871
 872 static int
 873 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 874 {
 875         struct v4l2_fh *vfh = file->private_data;
 876         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 877
 878         if (format->type != video->queue.type)
 879                 return -EINVAL;
 880
 881         return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
 882 }
 883
 884 static int
 885 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 886 {
 887         struct v4l2_fh *vfh = file->private_data;
 888         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 889         const struct vsp1_format_info *info;
 890         int ret;
 891
 892         if (format->type != video->queue.type)
 893                 return -EINVAL;
 894
 895         ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
 896         if (ret < 0)
 897                 return ret;
 898
 899         mutex_lock(&video->lock);
 900
 901         if (vb2_is_busy(&video->queue)) {
 902                 ret = -EBUSY;
 903                 goto done;
 904         }
 905
 906         video->format = format->fmt.pix_mp;
 907         video->fmtinfo = info;
 908
 909 done:
 910         mutex_unlock(&video->lock);
 911         return ret;
 912 }
 913
 914 static int
 915 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 916 {
 917         struct v4l2_fh *vfh = file->private_data;
 918         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 919         struct vsp1_pipeline *pipe;
 920         int ret;
 921
 922         if (video->queue.owner && video->queue.owner != file->private_data)
 923                 return -EBUSY;
 924
 925         video->sequence = 0;
 926
 927         /* Start streaming on the pipeline. No link touching an entity in the
 928          * pipeline can be activated or deactivated once streaming is started.
 929          *
 930          * Use the VSP1 pipeline object embedded in the first video object that
 931          * starts streaming.
 932          */
 933         pipe = video->video.entity.pipe
 934              ? to_vsp1_pipeline(&video->video.entity) : &video->pipe;
 935
 936         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
 937         if (ret < 0)
 938                 return ret;
 939
 940         /* Verify that the configured format matches the output of the connected
 941          * subdev.
 942          */
 943         ret = vsp1_video_verify_format(video);
 944         if (ret < 0)
 945                 goto err_stop;
 946
 947         ret = vsp1_pipeline_init(pipe, video);
 948         if (ret < 0)
 949                 goto err_stop;
 950
 951         /* Start the queue. */
 952         ret = vb2_streamon(&video->queue, type);
 953         if (ret < 0)
 954                 goto err_cleanup;
 955
 956         return 0;
 957
 958 err_cleanup:
 959         vsp1_pipeline_cleanup(pipe);
 960 err_stop:
 961         media_entity_pipeline_stop(&video->video.entity);
 962         return ret;
 963 }
 964
 965 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
 966         .vidioc_querycap                = vsp1_video_querycap,
 967         .vidioc_g_fmt_vid_cap_mplane    = vsp1_video_get_format,
 968         .vidioc_s_fmt_vid_cap_mplane    = vsp1_video_set_format,
 969         .vidioc_try_fmt_vid_cap_mplane  = vsp1_video_try_format,
 970         .vidioc_g_fmt_vid_out_mplane    = vsp1_video_get_format,
 971         .vidioc_s_fmt_vid_out_mplane    = vsp1_video_set_format,
 972         .vidioc_try_fmt_vid_out_mplane  = vsp1_video_try_format,
 973         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 974         .vidioc_querybuf                = vb2_ioctl_querybuf,
 975         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 976         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 977         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 978         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 979         .vidioc_streamon                = vsp1_video_streamon,
 980         .vidioc_streamoff               = vb2_ioctl_streamoff,
 981 };
 982
 983 /* -----------------------------------------------------------------------------
 984  * V4L2 File Operations
 985  */
 986
 987 static int vsp1_video_open(struct file *file)
 988 {
 989         struct vsp1_video *video = video_drvdata(file);
 990         struct v4l2_fh *vfh;
 991         int ret = 0;
 992
 993         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
 994         if (vfh == NULL)
 995                 return -ENOMEM;
 996
 997         v4l2_fh_init(vfh, &video->video);
 998         v4l2_fh_add(vfh);
 999
1000         file->private_data = vfh;
1001
1002         ret = vsp1_device_get(video->vsp1);
1003         if (ret < 0) {
1004                 v4l2_fh_del(vfh);
1005                 kfree(vfh);
1006         }
1007
1008         return ret;
1009 }
1010
1011 static int vsp1_video_release(struct file *file)
1012 {
1013         struct vsp1_video *video = video_drvdata(file);
1014         struct v4l2_fh *vfh = file->private_data;
1015
1016         mutex_lock(&video->lock);
1017         if (video->queue.owner == vfh) {
1018                 vb2_queue_release(&video->queue);
1019                 video->queue.owner = NULL;
1020         }
1021         mutex_unlock(&video->lock);
1022
1023         vsp1_device_put(video->vsp1);
1024
1025         v4l2_fh_release(file);
1026
1027         file->private_data = NULL;
1028
1029         return 0;
1030 }
1031
1032 static struct v4l2_file_operations vsp1_video_fops = {
1033         .owner = THIS_MODULE,
1034         .unlocked_ioctl = video_ioctl2,
1035         .open = vsp1_video_open,
1036         .release = vsp1_video_release,
1037         .poll = vb2_fop_poll,
1038         .mmap = vb2_fop_mmap,
1039 };
1040
1041 /* -----------------------------------------------------------------------------
1042  * Initialization and Cleanup
1043  */
1044
1045 int vsp1_video_init(struct vsp1_video *video, struct vsp1_entity *rwpf)
1046 {
1047         const char *direction;
1048         int ret;
1049
1050         switch (video->type) {
1051         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1052                 direction = "output";
1053                 video->pad.flags = MEDIA_PAD_FL_SINK;
1054                 break;
1055
1056         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1057                 direction = "input";
1058                 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1059                 video->video.vfl_dir = VFL_DIR_TX;
1060                 break;
1061
1062         default:
1063                 return -EINVAL;
1064         }
1065
1066         video->rwpf = rwpf;
1067
1068         mutex_init(&video->lock);
1069         spin_lock_init(&video->irqlock);
1070         INIT_LIST_HEAD(&video->irqqueue);
1071
1072         mutex_init(&video->pipe.lock);
1073         spin_lock_init(&video->pipe.irqlock);
1074         INIT_LIST_HEAD(&video->pipe.entities);
1075         init_waitqueue_head(&video->pipe.wq);
1076         video->pipe.state = VSP1_PIPELINE_STOPPED;
1077
1078         /* Initialize the media entity... */
1079         ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1080         if (ret < 0)
1081                 return ret;
1082
1083         /* ... and the format ... */
1084         video->fmtinfo = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
1085         video->format.pixelformat = video->fmtinfo->fourcc;
1086         video->format.colorspace = V4L2_COLORSPACE_SRGB;
1087         video->format.field = V4L2_FIELD_NONE;
1088         video->format.width = VSP1_VIDEO_DEF_WIDTH;
1089         video->format.height = VSP1_VIDEO_DEF_HEIGHT;
1090         video->format.num_planes = 1;
1091         video->format.plane_fmt[0].bytesperline =
1092                 video->format.width * video->fmtinfo->bpp[0] / 8;
1093         video->format.plane_fmt[0].sizeimage =
1094                 video->format.plane_fmt[0].bytesperline * video->format.height;
1095
1096         /* ... and the video node... */
1097         video->video.v4l2_dev = &video->vsp1->v4l2_dev;
1098         video->video.fops = &vsp1_video_fops;
1099         snprintf(video->video.name, sizeof(video->video.name), "%s %s",
1100                  rwpf->subdev.name, direction);
1101         video->video.vfl_type = VFL_TYPE_GRABBER;
1102         video->video.release = video_device_release_empty;
1103         video->video.ioctl_ops = &vsp1_video_ioctl_ops;
1104
1105         video_set_drvdata(&video->video, video);
1106
1107         /* ... and the buffers queue... */
1108         video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
1109         if (IS_ERR(video->alloc_ctx)) {
1110                 ret = PTR_ERR(video->alloc_ctx);
1111                 goto error;
1112         }
1113
1114         video->queue.type = video->type;
1115         video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1116         video->queue.lock = &video->lock;
1117         video->queue.drv_priv = video;
1118         video->queue.buf_struct_size = sizeof(struct vsp1_video_buffer);
1119         video->queue.ops = &vsp1_video_queue_qops;
1120         video->queue.mem_ops = &vb2_dma_contig_memops;
1121         video->queue.timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1122         ret = vb2_queue_init(&video->queue);
1123         if (ret < 0) {
1124                 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
1125                 goto error;
1126         }
1127
1128         /* ... and register the video device. */
1129         video->video.queue = &video->queue;
1130         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1131         if (ret < 0) {
1132                 dev_err(video->vsp1->dev, "failed to register video device\n");
1133                 goto error;
1134         }
1135
1136         return 0;
1137
1138 error:
1139         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1140         vsp1_video_cleanup(video);
1141         return ret;
1142 }
1143
1144 void vsp1_video_cleanup(struct vsp1_video *video)
1145 {
1146         if (video_is_registered(&video->video))
1147                 video_unregister_device(&video->video);
1148
1149         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1150         media_entity_cleanup(&video->video.entity);
1151 }