kernel/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_uds.h"
  35 #include "vsp1_video.h"
  36
  37 #define VSP1_VIDEO_DEF_FORMAT           V4L2_PIX_FMT_YUYV
  38 #define VSP1_VIDEO_DEF_WIDTH            1024
  39 #define VSP1_VIDEO_DEF_HEIGHT           768
  40
  41 #define VSP1_VIDEO_MIN_WIDTH            2U
  42 #define VSP1_VIDEO_MAX_WIDTH            8190U
  43 #define VSP1_VIDEO_MIN_HEIGHT           2U
  44 #define VSP1_VIDEO_MAX_HEIGHT           8190U
  45
  46 /* -----------------------------------------------------------------------------
  47  * Helper functions
  48  */
  49
  50 static const struct vsp1_format_info vsp1_video_formats[] = {
  51         { V4L2_PIX_FMT_RGB332, MEDIA_BUS_FMT_ARGB8888_1X32,
  52           VI6_FMT_RGB_332, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  53           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  54           1, { 8, 0, 0 }, false, false, 1, 1, false },
  55         { V4L2_PIX_FMT_ARGB444, MEDIA_BUS_FMT_ARGB8888_1X32,
  56           VI6_FMT_ARGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  57           VI6_RPF_DSWAP_P_WDS,
  58           1, { 16, 0, 0 }, false, false, 1, 1, true },
  59         { V4L2_PIX_FMT_XRGB444, MEDIA_BUS_FMT_ARGB8888_1X32,
  60           VI6_FMT_XRGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  61           VI6_RPF_DSWAP_P_WDS,
  62           1, { 16, 0, 0 }, false, false, 1, 1, true },
  63         { V4L2_PIX_FMT_ARGB555, MEDIA_BUS_FMT_ARGB8888_1X32,
  64           VI6_FMT_ARGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  65           VI6_RPF_DSWAP_P_WDS,
  66           1, { 16, 0, 0 }, false, false, 1, 1, true },
  67         { V4L2_PIX_FMT_XRGB555, MEDIA_BUS_FMT_ARGB8888_1X32,
  68           VI6_FMT_XRGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  69           VI6_RPF_DSWAP_P_WDS,
  70           1, { 16, 0, 0 }, false, false, 1, 1, false },
  71         { V4L2_PIX_FMT_RGB565, MEDIA_BUS_FMT_ARGB8888_1X32,
  72           VI6_FMT_RGB_565, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  73           VI6_RPF_DSWAP_P_WDS,
  74           1, { 16, 0, 0 }, false, false, 1, 1, false },
  75         { V4L2_PIX_FMT_BGR24, MEDIA_BUS_FMT_ARGB8888_1X32,
  76           VI6_FMT_BGR_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  77           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  78           1, { 24, 0, 0 }, false, false, 1, 1, false },
  79         { V4L2_PIX_FMT_RGB24, MEDIA_BUS_FMT_ARGB8888_1X32,
  80           VI6_FMT_RGB_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  81           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  82           1, { 24, 0, 0 }, false, false, 1, 1, false },
  83         { V4L2_PIX_FMT_ABGR32, MEDIA_BUS_FMT_ARGB8888_1X32,
  84           VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
  85           1, { 32, 0, 0 }, false, false, 1, 1, true },
  86         { V4L2_PIX_FMT_XBGR32, MEDIA_BUS_FMT_ARGB8888_1X32,
  87           VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
  88           1, { 32, 0, 0 }, false, false, 1, 1, false },
  89         { V4L2_PIX_FMT_ARGB32, MEDIA_BUS_FMT_ARGB8888_1X32,
  90           VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  91           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  92           1, { 32, 0, 0 }, false, false, 1, 1, true },
  93         { V4L2_PIX_FMT_XRGB32, MEDIA_BUS_FMT_ARGB8888_1X32,
  94           VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  95           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  96           1, { 32, 0, 0 }, false, false, 1, 1, false },
  97         { V4L2_PIX_FMT_UYVY, MEDIA_BUS_FMT_AYUV8_1X32,
  98           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  99           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 100           1, { 16, 0, 0 }, false, false, 2, 1, false },
 101         { V4L2_PIX_FMT_VYUY, MEDIA_BUS_FMT_AYUV8_1X32,
 102           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 103           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 104           1, { 16, 0, 0 }, false, true, 2, 1, false },
 105         { V4L2_PIX_FMT_YUYV, MEDIA_BUS_FMT_AYUV8_1X32,
 106           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 107           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 108           1, { 16, 0, 0 }, true, false, 2, 1, false },
 109         { V4L2_PIX_FMT_YVYU, MEDIA_BUS_FMT_AYUV8_1X32,
 110           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 111           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 112           1, { 16, 0, 0 }, true, true, 2, 1, false },
 113         { V4L2_PIX_FMT_NV12M, MEDIA_BUS_FMT_AYUV8_1X32,
 114           VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 115           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 116           2, { 8, 16, 0 }, false, false, 2, 2, false },
 117         { V4L2_PIX_FMT_NV21M, MEDIA_BUS_FMT_AYUV8_1X32,
 118           VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 119           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 120           2, { 8, 16, 0 }, false, true, 2, 2, false },
 121         { V4L2_PIX_FMT_NV16M, MEDIA_BUS_FMT_AYUV8_1X32,
 122           VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 123           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 124           2, { 8, 16, 0 }, false, false, 2, 1, false },
 125         { V4L2_PIX_FMT_NV61M, MEDIA_BUS_FMT_AYUV8_1X32,
 126           VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 127           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 128           2, { 8, 16, 0 }, false, true, 2, 1, false },
 129         { V4L2_PIX_FMT_YUV420M, MEDIA_BUS_FMT_AYUV8_1X32,
 130           VI6_FMT_Y_U_V_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 131           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 132           3, { 8, 8, 8 }, false, false, 2, 2, false },
 133 };
 134
 135 /*
 136  * vsp1_get_format_info - Retrieve format information for a 4CC
 137  * @fourcc: the format 4CC
 138  *
 139  * Return a pointer to the format information structure corresponding to the
 140  * given V4L2 format 4CC, or NULL if no corresponding format can be found.
 141  */
 142 static const struct vsp1_format_info *vsp1_get_format_info(u32 fourcc)
 143 {
 144         unsigned int i;
 145
 146         for (i = 0; i < ARRAY_SIZE(vsp1_video_formats); ++i) {
 147                 const struct vsp1_format_info *info = &vsp1_video_formats[i];
 148
 149                 if (info->fourcc == fourcc)
 150                         return info;
 151         }
 152
 153         return NULL;
 154 }
 155
 156
 157 static struct v4l2_subdev *
 158 vsp1_video_remote_subdev(struct media_pad *local, u32 *pad)
 159 {
 160         struct media_pad *remote;
 161
 162         remote = media_entity_remote_pad(local);
 163         if (remote == NULL ||
 164             media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 165                 return NULL;
 166
 167         if (pad)
 168                 *pad = remote->index;
 169
 170         return media_entity_to_v4l2_subdev(remote->entity);
 171 }
 172
 173 static int vsp1_video_verify_format(struct vsp1_video *video)
 174 {
 175         struct v4l2_subdev_format fmt;
 176         struct v4l2_subdev *subdev;
 177         int ret;
 178
 179         subdev = vsp1_video_remote_subdev(&video->pad, &fmt.pad);
 180         if (subdev == NULL)
 181                 return -EINVAL;
 182
 183         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 184         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 185         if (ret < 0)
 186                 return ret == -ENOIOCTLCMD ? -EINVAL : ret;
 187
 188         if (video->fmtinfo->mbus != fmt.format.code ||
 189             video->format.height != fmt.format.height ||
 190             video->format.width != fmt.format.width)
 191                 return -EINVAL;
 192
 193         return 0;
 194 }
 195
 196 static int __vsp1_video_try_format(struct vsp1_video *video,
 197                                    struct v4l2_pix_format_mplane *pix,
 198                                    const struct vsp1_format_info **fmtinfo)
 199 {
 200         static const u32 xrgb_formats[][2] = {
 201                 { V4L2_PIX_FMT_RGB444, V4L2_PIX_FMT_XRGB444 },
 202                 { V4L2_PIX_FMT_RGB555, V4L2_PIX_FMT_XRGB555 },
 203                 { V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_XBGR32 },
 204                 { V4L2_PIX_FMT_RGB32, V4L2_PIX_FMT_XRGB32 },
 205         };
 206
 207         const struct vsp1_format_info *info;
 208         unsigned int width = pix->width;
 209         unsigned int height = pix->height;
 210         unsigned int i;
 211
 212         /* Backward compatibility: replace deprecated RGB formats by their XRGB
 213          * equivalent. This selects the format older userspace applications want
 214          * while still exposing the new format.
 215          */
 216         for (i = 0; i < ARRAY_SIZE(xrgb_formats); ++i) {
 217                 if (xrgb_formats[i][0] == pix->pixelformat) {
 218                         pix->pixelformat = xrgb_formats[i][1];
 219                         break;
 220                 }
 221         }
 222
 223         /* Retrieve format information and select the default format if the
 224          * requested format isn't supported.
 225          */
 226         info = vsp1_get_format_info(pix->pixelformat);
 227         if (info == NULL)
 228                 info = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
 229
 230         pix->pixelformat = info->fourcc;
 231         pix->colorspace = V4L2_COLORSPACE_SRGB;
 232         pix->field = V4L2_FIELD_NONE;
 233         memset(pix->reserved, 0, sizeof(pix->reserved));
 234
 235         /* Align the width and height for YUV 4:2:2 and 4:2:0 formats. */
 236         width = round_down(width, info->hsub);
 237         height = round_down(height, info->vsub);
 238
 239         /* Clamp the width and height. */
 240         pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH);
 241         pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT,
 242                             VSP1_VIDEO_MAX_HEIGHT);
 243
 244         /* Compute and clamp the stride and image size. While not documented in
 245          * the datasheet, strides not aligned to a multiple of 128 bytes result
 246          * in image corruption.
 247          */
 248         for (i = 0; i < max(info->planes, 2U); ++i) {
 249                 unsigned int hsub = i > 0 ? info->hsub : 1;
 250                 unsigned int vsub = i > 0 ? info->vsub : 1;
 251                 unsigned int align = 128;
 252                 unsigned int bpl;
 253
 254                 bpl = clamp_t(unsigned int, pix->plane_fmt[i].bytesperline,
 255                               pix->width / hsub * info->bpp[i] / 8,
 256                               round_down(65535U, align));
 257
 258                 pix->plane_fmt[i].bytesperline = round_up(bpl, align);
 259                 pix->plane_fmt[i].sizeimage = pix->plane_fmt[i].bytesperline
 260                                             * pix->height / vsub;
 261         }
 262
 263         if (info->planes == 3) {
 264                 /* The second and third planes must have the same stride. */
 265                 pix->plane_fmt[2].bytesperline = pix->plane_fmt[1].bytesperline;
 266                 pix->plane_fmt[2].sizeimage = pix->plane_fmt[1].sizeimage;
 267         }
 268
 269         pix->num_planes = info->planes;
 270
 271         if (fmtinfo)
 272                 *fmtinfo = info;
 273
 274         return 0;
 275 }
 276
 277 static bool
 278 vsp1_video_format_adjust(struct vsp1_video *video,
 279                          const struct v4l2_pix_format_mplane *format,
 280                          struct v4l2_pix_format_mplane *adjust)
 281 {
 282         unsigned int i;
 283
 284         *adjust = *format;
 285         __vsp1_video_try_format(video, adjust, NULL);
 286
 287         if (format->width != adjust->width ||
 288             format->height != adjust->height ||
 289             format->pixelformat != adjust->pixelformat ||
 290             format->num_planes != adjust->num_planes)
 291                 return false;
 292
 293         for (i = 0; i < format->num_planes; ++i) {
 294                 if (format->plane_fmt[i].bytesperline !=
 295                     adjust->plane_fmt[i].bytesperline)
 296                         return false;
 297
 298                 adjust->plane_fmt[i].sizeimage =
 299                         max(adjust->plane_fmt[i].sizeimage,
 300                             format->plane_fmt[i].sizeimage);
 301         }
 302
 303         return true;
 304 }
 305
 306 /* -----------------------------------------------------------------------------
 307  * Pipeline Management
 308  */
 309
 310 static int vsp1_pipeline_validate_branch(struct vsp1_pipeline *pipe,
 311                                          struct vsp1_rwpf *input,
 312                                          struct vsp1_rwpf *output)
 313 {
 314         struct vsp1_entity *entity;
 315         unsigned int entities = 0;
 316         struct media_pad *pad;
 317         bool bru_found = false;
 318
 319         input->location.left = 0;
 320         input->location.top = 0;
 321
 322         pad = media_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
 323
 324         while (1) {
 325                 if (pad == NULL)
 326                         return -EPIPE;
 327
 328                 /* We've reached a video node, that shouldn't have happened. */
 329                 if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 330                         return -EPIPE;
 331
 332                 entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
 333
 334                 /* A BRU is present in the pipeline, store the compose rectangle
 335                  * location in the input RPF for use when configuring the RPF.
 336                  */
 337                 if (entity->type == VSP1_ENTITY_BRU) {
 338                         struct vsp1_bru *bru = to_bru(&entity->subdev);
 339                         struct v4l2_rect *rect =
 340                                 &bru->inputs[pad->index].compose;
 341
 342                         bru->inputs[pad->index].rpf = input;
 343
 344                         input->location.left = rect->left;
 345                         input->location.top = rect->top;
 346
 347                         bru_found = true;
 348                 }
 349
 350                 /* We've reached the WPF, we're done. */
 351                 if (entity->type == VSP1_ENTITY_WPF)
 352                         break;
 353
 354                 /* Ensure the branch has no loop. */
 355                 if (entities & (1 << entity->subdev.entity.id))
 356                         return -EPIPE;
 357
 358                 entities |= 1 << entity->subdev.entity.id;
 359
 360                 /* UDS can't be chained. */
 361                 if (entity->type == VSP1_ENTITY_UDS) {
 362                         if (pipe->uds)
 363                                 return -EPIPE;
 364
 365                         pipe->uds = entity;
 366                         pipe->uds_input = bru_found ? pipe->bru
 367                                         : &input->entity;
 368                 }
 369
 370                 /* Follow the source link. The link setup operations ensure
 371                  * that the output fan-out can't be more than one, there is thus
 372                  * no need to verify here that only a single source link is
 373                  * activated.
 374                  */
 375                 pad = &entity->pads[entity->source_pad];
 376                 pad = media_entity_remote_pad(pad);
 377         }
 378
 379         /* The last entity must be the output WPF. */
 380         if (entity != &output->entity)
 381                 return -EPIPE;
 382
 383         return 0;
 384 }
 385
 386 static void __vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
 387 {
 388         if (pipe->bru) {
 389                 struct vsp1_bru *bru = to_bru(&pipe->bru->subdev);
 390                 unsigned int i;
 391
 392                 for (i = 0; i < ARRAY_SIZE(bru->inputs); ++i)
 393                         bru->inputs[i].rpf = NULL;
 394         }
 395
 396         INIT_LIST_HEAD(&pipe->entities);
 397         pipe->state = VSP1_PIPELINE_STOPPED;
 398         pipe->buffers_ready = 0;
 399         pipe->num_video = 0;
 400         pipe->num_inputs = 0;
 401         pipe->output = NULL;
 402         pipe->bru = NULL;
 403         pipe->lif = NULL;
 404         pipe->uds = NULL;
 405 }
 406
 407 static int vsp1_pipeline_validate(struct vsp1_pipeline *pipe,
 408                                   struct vsp1_video *video)
 409 {
 410         struct media_entity_graph graph;
 411         struct media_entity *entity = &video->video.entity;
 412         struct media_device *mdev = entity->parent;
 413         unsigned int i;
 414         int ret;
 415
 416         mutex_lock(&mdev->graph_mutex);
 417
 418         /* Walk the graph to locate the entities and video nodes. */
 419         media_entity_graph_walk_start(&graph, entity);
 420
 421         while ((entity = media_entity_graph_walk_next(&graph))) {
 422                 struct v4l2_subdev *subdev;
 423                 struct vsp1_rwpf *rwpf;
 424                 struct vsp1_entity *e;
 425
 426                 if (media_entity_type(entity) != MEDIA_ENT_T_V4L2_SUBDEV) {
 427                         pipe->num_video++;
 428                         continue;
 429                 }
 430
 431                 subdev = media_entity_to_v4l2_subdev(entity);
 432                 e = to_vsp1_entity(subdev);
 433                 list_add_tail(&e->list_pipe, &pipe->entities);
 434
 435                 if (e->type == VSP1_ENTITY_RPF) {
 436                         rwpf = to_rwpf(subdev);
 437                         pipe->inputs[pipe->num_inputs++] = rwpf;
 438                         rwpf->video.pipe_index = pipe->num_inputs;
 439                 } else if (e->type == VSP1_ENTITY_WPF) {
 440                         rwpf = to_rwpf(subdev);
 441                         pipe->output = to_rwpf(subdev);
 442                         rwpf->video.pipe_index = 0;
 443                 } else if (e->type == VSP1_ENTITY_LIF) {
 444                         pipe->lif = e;
 445                 } else if (e->type == VSP1_ENTITY_BRU) {
 446                         pipe->bru = e;
 447                 }
 448         }
 449
 450         mutex_unlock(&mdev->graph_mutex);
 451
 452         /* We need one output and at least one input. */
 453         if (pipe->num_inputs == 0 || !pipe->output) {
 454                 ret = -EPIPE;
 455                 goto error;
 456         }
 457
 458         /* Follow links downstream for each input and make sure the graph
 459          * contains no loop and that all branches end at the output WPF.
 460          */
 461         for (i = 0; i < pipe->num_inputs; ++i) {
 462                 ret = vsp1_pipeline_validate_branch(pipe, pipe->inputs[i],
 463                                                     pipe->output);
 464                 if (ret < 0)
 465                         goto error;
 466         }
 467
 468         return 0;
 469
 470 error:
 471         __vsp1_pipeline_cleanup(pipe);
 472         return ret;
 473 }
 474
 475 static int vsp1_pipeline_init(struct vsp1_pipeline *pipe,
 476                               struct vsp1_video *video)
 477 {
 478         int ret;
 479
 480         mutex_lock(&pipe->lock);
 481
 482         /* If we're the first user validate and initialize the pipeline. */
 483         if (pipe->use_count == 0) {
 484                 ret = vsp1_pipeline_validate(pipe, video);
 485                 if (ret < 0)
 486                         goto done;
 487         }
 488
 489         pipe->use_count++;
 490         ret = 0;
 491
 492 done:
 493         mutex_unlock(&pipe->lock);
 494         return ret;
 495 }
 496
 497 static void vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
 498 {
 499         mutex_lock(&pipe->lock);
 500
 501         /* If we're the last user clean up the pipeline. */
 502         if (--pipe->use_count == 0)
 503                 __vsp1_pipeline_cleanup(pipe);
 504
 505         mutex_unlock(&pipe->lock);
 506 }
 507
 508 static void vsp1_pipeline_run(struct vsp1_pipeline *pipe)
 509 {
 510         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 511
 512         vsp1_write(vsp1, VI6_CMD(pipe->output->entity.index), VI6_CMD_STRCMD);
 513         pipe->state = VSP1_PIPELINE_RUNNING;
 514         pipe->buffers_ready = 0;
 515 }
 516
 517 static int vsp1_pipeline_stop(struct vsp1_pipeline *pipe)
 518 {
 519         struct vsp1_entity *entity;
 520         unsigned long flags;
 521         int ret;
 522
 523         spin_lock_irqsave(&pipe->irqlock, flags);
 524         if (pipe->state == VSP1_PIPELINE_RUNNING)
 525                 pipe->state = VSP1_PIPELINE_STOPPING;
 526         spin_unlock_irqrestore(&pipe->irqlock, flags);
 527
 528         ret = wait_event_timeout(pipe->wq, pipe->state == VSP1_PIPELINE_STOPPED,
 529                                  msecs_to_jiffies(500));
 530         ret = ret == 0 ? -ETIMEDOUT : 0;
 531
 532         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 533                 if (entity->route && entity->route->reg)
 534                         vsp1_write(entity->vsp1, entity->route->reg,
 535                                    VI6_DPR_NODE_UNUSED);
 536
 537                 v4l2_subdev_call(&entity->subdev, video, s_stream, 0);
 538         }
 539
 540         return ret;
 541 }
 542
 543 static bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe)
 544 {
 545         unsigned int mask;
 546
 547         mask = ((1 << pipe->num_inputs) - 1) << 1;
 548         if (!pipe->lif)
 549                 mask |= 1 << 0;
 550
 551         return pipe->buffers_ready == mask;
 552 }
 553
 554 /*
 555  * vsp1_video_complete_buffer - Complete the current buffer
 556  * @video: the video node
 557  *
 558  * This function completes the current buffer by filling its sequence number,
 559  * time stamp and payload size, and hands it back to the videobuf core.
 560  *
 561  * When operating in DU output mode (deep pipeline to the DU through the LIF),
 562  * the VSP1 needs to constantly supply frames to the display. In that case, if
 563  * no other buffer is queued, reuse the one that has just been processed instead
 564  * of handing it back to the videobuf core.
 565  *
 566  * Return the next queued buffer or NULL if the queue is empty.
 567  */
 568 static struct vsp1_video_buffer *
 569 vsp1_video_complete_buffer(struct vsp1_video *video)
 570 {
 571         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 572         struct vsp1_video_buffer *next = NULL;
 573         struct vsp1_video_buffer *done;
 574         unsigned long flags;
 575         unsigned int i;
 576
 577         spin_lock_irqsave(&video->irqlock, flags);
 578
 579         if (list_empty(&video->irqqueue)) {
 580                 spin_unlock_irqrestore(&video->irqlock, flags);
 581                 return NULL;
 582         }
 583
 584         done = list_first_entry(&video->irqqueue,
 585                                 struct vsp1_video_buffer, queue);
 586
 587         /* In DU output mode reuse the buffer if the list is singular. */
 588         if (pipe->lif && list_is_singular(&video->irqqueue)) {
 589                 spin_unlock_irqrestore(&video->irqlock, flags);
 590                 return done;
 591         }
 592
 593         list_del(&done->queue);
 594
 595         if (!list_empty(&video->irqqueue))
 596                 next = list_first_entry(&video->irqqueue,
 597                                         struct vsp1_video_buffer, queue);
 598
 599         spin_unlock_irqrestore(&video->irqlock, flags);
 600
 601         done->buf.v4l2_buf.sequence = video->sequence++;
 602         v4l2_get_timestamp(&done->buf.v4l2_buf.timestamp);
 603         for (i = 0; i < done->buf.num_planes; ++i)
 604                 vb2_set_plane_payload(&done->buf, i, done->length[i]);
 605         vb2_buffer_done(&done->buf, VB2_BUF_STATE_DONE);
 606
 607         return next;
 608 }
 609
 610 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
 611                                  struct vsp1_video *video)
 612 {
 613         struct vsp1_video_buffer *buf;
 614         unsigned long flags;
 615
 616         buf = vsp1_video_complete_buffer(video);
 617         if (buf == NULL)
 618                 return;
 619
 620         spin_lock_irqsave(&pipe->irqlock, flags);
 621
 622         video->ops->queue(video, buf);
 623         pipe->buffers_ready |= 1 << video->pipe_index;
 624
 625         spin_unlock_irqrestore(&pipe->irqlock, flags);
 626 }
 627
 628 void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
 629 {
 630         enum vsp1_pipeline_state state;
 631         unsigned long flags;
 632         unsigned int i;
 633
 634         if (pipe == NULL)
 635                 return;
 636
 637         /* Complete buffers on all video nodes. */
 638         for (i = 0; i < pipe->num_inputs; ++i)
 639                 vsp1_video_frame_end(pipe, &pipe->inputs[i]->video);
 640
 641         if (!pipe->lif)
 642                 vsp1_video_frame_end(pipe, &pipe->output->video);
 643
 644         spin_lock_irqsave(&pipe->irqlock, flags);
 645
 646         state = pipe->state;
 647         pipe->state = VSP1_PIPELINE_STOPPED;
 648
 649         /* If a stop has been requested, mark the pipeline as stopped and
 650          * return.
 651          */
 652         if (state == VSP1_PIPELINE_STOPPING) {
 653                 wake_up(&pipe->wq);
 654                 goto done;
 655         }
 656
 657         /* Restart the pipeline if ready. */
 658         if (vsp1_pipeline_ready(pipe))
 659                 vsp1_pipeline_run(pipe);
 660
 661 done:
 662         spin_unlock_irqrestore(&pipe->irqlock, flags);
 663 }
 664
 665 /*
 666  * Propagate the alpha value through the pipeline.
 667  *
 668  * As the UDS has restricted scaling capabilities when the alpha component needs
 669  * to be scaled, we disable alpha scaling when the UDS input has a fixed alpha
 670  * value. The UDS then outputs a fixed alpha value which needs to be programmed
 671  * from the input RPF alpha.
 672  */
 673 void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe,
 674                                    struct vsp1_entity *input,
 675                                    unsigned int alpha)
 676 {
 677         struct vsp1_entity *entity;
 678         struct media_pad *pad;
 679
 680         pad = media_entity_remote_pad(&input->pads[RWPF_PAD_SOURCE]);
 681
 682         while (pad) {
 683                 if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 684                         break;
 685
 686                 entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
 687
 688                 /* The BRU background color has a fixed alpha value set to 255,
 689                  * the output alpha value is thus always equal to 255.
 690                  */
 691                 if (entity->type == VSP1_ENTITY_BRU)
 692                         alpha = 255;
 693
 694                 if (entity->type == VSP1_ENTITY_UDS) {
 695                         struct vsp1_uds *uds = to_uds(&entity->subdev);
 696
 697                         vsp1_uds_set_alpha(uds, alpha);
 698                         break;
 699                 }
 700
 701                 pad = &entity->pads[entity->source_pad];
 702                 pad = media_entity_remote_pad(pad);
 703         }
 704 }
 705
 706 /* -----------------------------------------------------------------------------
 707  * videobuf2 Queue Operations
 708  */
 709
 710 static int
 711 vsp1_video_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 712                      unsigned int *nbuffers, unsigned int *nplanes,
 713                      unsigned int sizes[], void *alloc_ctxs[])
 714 {
 715         struct vsp1_video *video = vb2_get_drv_priv(vq);
 716         const struct v4l2_pix_format_mplane *format;
 717         struct v4l2_pix_format_mplane pix_mp;
 718         unsigned int i;
 719
 720         if (fmt) {
 721                 /* Make sure the format is valid and adjust the sizeimage field
 722                  * if needed.
 723                  */
 724                 if (!vsp1_video_format_adjust(video, &fmt->fmt.pix_mp, &pix_mp))
 725                         return -EINVAL;
 726
 727                 format = &pix_mp;
 728         } else {
 729                 format = &video->format;
 730         }
 731
 732         *nplanes = format->num_planes;
 733
 734         for (i = 0; i < format->num_planes; ++i) {
 735                 sizes[i] = format->plane_fmt[i].sizeimage;
 736                 alloc_ctxs[i] = video->alloc_ctx;
 737         }
 738
 739         return 0;
 740 }
 741
 742 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
 743 {
 744         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 745         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
 746         const struct v4l2_pix_format_mplane *format = &video->format;
 747         unsigned int i;
 748
 749         if (vb->num_planes < format->num_planes)
 750                 return -EINVAL;
 751
 752         for (i = 0; i < vb->num_planes; ++i) {
 753                 buf->addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 754                 buf->length[i] = vb2_plane_size(vb, i);
 755
 756                 if (buf->length[i] < format->plane_fmt[i].sizeimage)
 757                         return -EINVAL;
 758         }
 759
 760         return 0;
 761 }
 762
 763 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
 764 {
 765         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 766         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 767         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
 768         unsigned long flags;
 769         bool empty;
 770
 771         spin_lock_irqsave(&video->irqlock, flags);
 772         empty = list_empty(&video->irqqueue);
 773         list_add_tail(&buf->queue, &video->irqqueue);
 774         spin_unlock_irqrestore(&video->irqlock, flags);
 775
 776         if (!empty)
 777                 return;
 778
 779         spin_lock_irqsave(&pipe->irqlock, flags);
 780
 781         video->ops->queue(video, buf);
 782         pipe->buffers_ready |= 1 << video->pipe_index;
 783
 784         if (vb2_is_streaming(&video->queue) &&
 785             vsp1_pipeline_ready(pipe))
 786                 vsp1_pipeline_run(pipe);
 787
 788         spin_unlock_irqrestore(&pipe->irqlock, flags);
 789 }
 790
 791 static void vsp1_entity_route_setup(struct vsp1_entity *source)
 792 {
 793         struct vsp1_entity *sink;
 794
 795         if (source->route->reg == 0)
 796                 return;
 797
 798         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
 799         vsp1_write(source->vsp1, source->route->reg,
 800                    sink->route->inputs[source->sink_pad]);
 801 }
 802
 803 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 804 {
 805         struct vsp1_video *video = vb2_get_drv_priv(vq);
 806         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 807         struct vsp1_entity *entity;
 808         unsigned long flags;
 809         int ret;
 810
 811         mutex_lock(&pipe->lock);
 812         if (pipe->stream_count == pipe->num_video - 1) {
 813                 if (pipe->uds) {
 814                         struct vsp1_uds *uds = to_uds(&pipe->uds->subdev);
 815
 816                         /* If a BRU is present in the pipeline before the UDS,
 817                          * the alpha component doesn't need to be scaled as the
 818                          * BRU output alpha value is fixed to 255. Otherwise we
 819                          * need to scale the alpha component only when available
 820                          * at the input RPF.
 821                          */
 822                         if (pipe->uds_input->type == VSP1_ENTITY_BRU) {
 823                                 uds->scale_alpha = false;
 824                         } else {
 825                                 struct vsp1_rwpf *rpf =
 826                                         to_rwpf(&pipe->uds_input->subdev);
 827
 828                                 uds->scale_alpha = rpf->video.fmtinfo->alpha;
 829                         }
 830                 }
 831
 832                 list_for_each_entry(entity, &pipe->entities, list_pipe) {
 833                         vsp1_entity_route_setup(entity);
 834
 835                         ret = v4l2_subdev_call(&entity->subdev, video,
 836                                                s_stream, 1);
 837                         if (ret < 0) {
 838                                 mutex_unlock(&pipe->lock);
 839                                 return ret;
 840                         }
 841                 }
 842         }
 843
 844         pipe->stream_count++;
 845         mutex_unlock(&pipe->lock);
 846
 847         spin_lock_irqsave(&pipe->irqlock, flags);
 848         if (vsp1_pipeline_ready(pipe))
 849                 vsp1_pipeline_run(pipe);
 850         spin_unlock_irqrestore(&pipe->irqlock, flags);
 851
 852         return 0;
 853 }
 854
 855 static void vsp1_video_stop_streaming(struct vb2_queue *vq)
 856 {
 857         struct vsp1_video *video = vb2_get_drv_priv(vq);
 858         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 859         struct vsp1_video_buffer *buffer;
 860         unsigned long flags;
 861         int ret;
 862
 863         mutex_lock(&pipe->lock);
 864         if (--pipe->stream_count == 0) {
 865                 /* Stop the pipeline. */
 866                 ret = vsp1_pipeline_stop(pipe);
 867                 if (ret == -ETIMEDOUT)
 868                         dev_err(video->vsp1->dev, "pipeline stop timeout\n");
 869         }
 870         mutex_unlock(&pipe->lock);
 871
 872         vsp1_pipeline_cleanup(pipe);
 873         media_entity_pipeline_stop(&video->video.entity);
 874
 875         /* Remove all buffers from the IRQ queue. */
 876         spin_lock_irqsave(&video->irqlock, flags);
 877         list_for_each_entry(buffer, &video->irqqueue, queue)
 878                 vb2_buffer_done(&buffer->buf, VB2_BUF_STATE_ERROR);
 879         INIT_LIST_HEAD(&video->irqqueue);
 880         spin_unlock_irqrestore(&video->irqlock, flags);
 881 }
 882
 883 static struct vb2_ops vsp1_video_queue_qops = {
 884         .queue_setup = vsp1_video_queue_setup,
 885         .buf_prepare = vsp1_video_buffer_prepare,
 886         .buf_queue = vsp1_video_buffer_queue,
 887         .wait_prepare = vb2_ops_wait_prepare,
 888         .wait_finish = vb2_ops_wait_finish,
 889         .start_streaming = vsp1_video_start_streaming,
 890         .stop_streaming = vsp1_video_stop_streaming,
 891 };
 892
 893 /* -----------------------------------------------------------------------------
 894  * V4L2 ioctls
 895  */
 896
 897 static int
 898 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 899 {
 900         struct v4l2_fh *vfh = file->private_data;
 901         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 902
 903         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
 904                           | V4L2_CAP_VIDEO_CAPTURE_MPLANE
 905                           | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
 906
 907         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 908                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
 909                                  | V4L2_CAP_STREAMING;
 910         else
 911                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
 912                                  | V4L2_CAP_STREAMING;
 913
 914         strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
 915         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 916         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 917                  dev_name(video->vsp1->dev));
 918
 919         return 0;
 920 }
 921
 922 static int
 923 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 924 {
 925         struct v4l2_fh *vfh = file->private_data;
 926         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 927
 928         if (format->type != video->queue.type)
 929                 return -EINVAL;
 930
 931         mutex_lock(&video->lock);
 932         format->fmt.pix_mp = video->format;
 933         mutex_unlock(&video->lock);
 934
 935         return 0;
 936 }
 937
 938 static int
 939 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 940 {
 941         struct v4l2_fh *vfh = file->private_data;
 942         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 943
 944         if (format->type != video->queue.type)
 945                 return -EINVAL;
 946
 947         return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
 948 }
 949
 950 static int
 951 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 952 {
 953         struct v4l2_fh *vfh = file->private_data;
 954         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 955         const struct vsp1_format_info *info;
 956         int ret;
 957
 958         if (format->type != video->queue.type)
 959                 return -EINVAL;
 960
 961         ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
 962         if (ret < 0)
 963                 return ret;
 964
 965         mutex_lock(&video->lock);
 966
 967         if (vb2_is_busy(&video->queue)) {
 968                 ret = -EBUSY;
 969                 goto done;
 970         }
 971
 972         video->format = format->fmt.pix_mp;
 973         video->fmtinfo = info;
 974
 975 done:
 976         mutex_unlock(&video->lock);
 977         return ret;
 978 }
 979
 980 static int
 981 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 982 {
 983         struct v4l2_fh *vfh = file->private_data;
 984         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 985         struct vsp1_pipeline *pipe;
 986         int ret;
 987
 988         if (video->queue.owner && video->queue.owner != file->private_data)
 989                 return -EBUSY;
 990
 991         video->sequence = 0;
 992
 993         /* Start streaming on the pipeline. No link touching an entity in the
 994          * pipeline can be activated or deactivated once streaming is started.
 995          *
 996          * Use the VSP1 pipeline object embedded in the first video object that
 997          * starts streaming.
 998          */
 999         pipe = video->video.entity.pipe
1000              ? to_vsp1_pipeline(&video->video.entity) : &video->pipe;
1001
1002         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
1003         if (ret < 0)
1004                 return ret;
1005
1006         /* Verify that the configured format matches the output of the connected
1007          * subdev.
1008          */
1009         ret = vsp1_video_verify_format(video);
1010         if (ret < 0)
1011                 goto err_stop;
1012
1013         ret = vsp1_pipeline_init(pipe, video);
1014         if (ret < 0)
1015                 goto err_stop;
1016
1017         /* Start the queue. */
1018         ret = vb2_streamon(&video->queue, type);
1019         if (ret < 0)
1020                 goto err_cleanup;
1021
1022         return 0;
1023
1024 err_cleanup:
1025         vsp1_pipeline_cleanup(pipe);
1026 err_stop:
1027         media_entity_pipeline_stop(&video->video.entity);
1028         return ret;
1029 }
1030
1031 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
1032         .vidioc_querycap                = vsp1_video_querycap,
1033         .vidioc_g_fmt_vid_cap_mplane    = vsp1_video_get_format,
1034         .vidioc_s_fmt_vid_cap_mplane    = vsp1_video_set_format,
1035         .vidioc_try_fmt_vid_cap_mplane  = vsp1_video_try_format,
1036         .vidioc_g_fmt_vid_out_mplane    = vsp1_video_get_format,
1037         .vidioc_s_fmt_vid_out_mplane    = vsp1_video_set_format,
1038         .vidioc_try_fmt_vid_out_mplane  = vsp1_video_try_format,
1039         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1040         .vidioc_querybuf                = vb2_ioctl_querybuf,
1041         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1042         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1043         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1044         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
1045         .vidioc_streamon                = vsp1_video_streamon,
1046         .vidioc_streamoff               = vb2_ioctl_streamoff,
1047 };
1048
1049 /* -----------------------------------------------------------------------------
1050  * V4L2 File Operations
1051  */
1052
1053 static int vsp1_video_open(struct file *file)
1054 {
1055         struct vsp1_video *video = video_drvdata(file);
1056         struct v4l2_fh *vfh;
1057         int ret = 0;
1058
1059         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
1060         if (vfh == NULL)
1061                 return -ENOMEM;
1062
1063         v4l2_fh_init(vfh, &video->video);
1064         v4l2_fh_add(vfh);
1065
1066         file->private_data = vfh;
1067
1068         ret = vsp1_device_get(video->vsp1);
1069         if (ret < 0) {
1070                 v4l2_fh_del(vfh);
1071                 kfree(vfh);
1072         }
1073
1074         return ret;
1075 }
1076
1077 static int vsp1_video_release(struct file *file)
1078 {
1079         struct vsp1_video *video = video_drvdata(file);
1080         struct v4l2_fh *vfh = file->private_data;
1081
1082         mutex_lock(&video->lock);
1083         if (video->queue.owner == vfh) {
1084                 vb2_queue_release(&video->queue);
1085                 video->queue.owner = NULL;
1086         }
1087         mutex_unlock(&video->lock);
1088
1089         vsp1_device_put(video->vsp1);
1090
1091         v4l2_fh_release(file);
1092
1093         file->private_data = NULL;
1094
1095         return 0;
1096 }
1097
1098 static struct v4l2_file_operations vsp1_video_fops = {
1099         .owner = THIS_MODULE,
1100         .unlocked_ioctl = video_ioctl2,
1101         .open = vsp1_video_open,
1102         .release = vsp1_video_release,
1103         .poll = vb2_fop_poll,
1104         .mmap = vb2_fop_mmap,
1105 };
1106
1107 /* -----------------------------------------------------------------------------
1108  * Initialization and Cleanup
1109  */
1110
1111 int vsp1_video_init(struct vsp1_video *video, struct vsp1_entity *rwpf)
1112 {
1113         const char *direction;
1114         int ret;
1115
1116         switch (video->type) {
1117         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1118                 direction = "output";
1119                 video->pad.flags = MEDIA_PAD_FL_SINK;
1120                 break;
1121
1122         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1123                 direction = "input";
1124                 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1125                 video->video.vfl_dir = VFL_DIR_TX;
1126                 break;
1127
1128         default:
1129                 return -EINVAL;
1130         }
1131
1132         video->rwpf = rwpf;
1133
1134         mutex_init(&video->lock);
1135         spin_lock_init(&video->irqlock);
1136         INIT_LIST_HEAD(&video->irqqueue);
1137
1138         mutex_init(&video->pipe.lock);
1139         spin_lock_init(&video->pipe.irqlock);
1140         INIT_LIST_HEAD(&video->pipe.entities);
1141         init_waitqueue_head(&video->pipe.wq);
1142         video->pipe.state = VSP1_PIPELINE_STOPPED;
1143
1144         /* Initialize the media entity... */
1145         ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1146         if (ret < 0)
1147                 return ret;
1148
1149         /* ... and the format ... */
1150         video->fmtinfo = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
1151         video->format.pixelformat = video->fmtinfo->fourcc;
1152         video->format.colorspace = V4L2_COLORSPACE_SRGB;
1153         video->format.field = V4L2_FIELD_NONE;
1154         video->format.width = VSP1_VIDEO_DEF_WIDTH;
1155         video->format.height = VSP1_VIDEO_DEF_HEIGHT;
1156         video->format.num_planes = 1;
1157         video->format.plane_fmt[0].bytesperline =
1158                 video->format.width * video->fmtinfo->bpp[0] / 8;
1159         video->format.plane_fmt[0].sizeimage =
1160                 video->format.plane_fmt[0].bytesperline * video->format.height;
1161
1162         /* ... and the video node... */
1163         video->video.v4l2_dev = &video->vsp1->v4l2_dev;
1164         video->video.fops = &vsp1_video_fops;
1165         snprintf(video->video.name, sizeof(video->video.name), "%s %s",
1166                  rwpf->subdev.name, direction);
1167         video->video.vfl_type = VFL_TYPE_GRABBER;
1168         video->video.release = video_device_release_empty;
1169         video->video.ioctl_ops = &vsp1_video_ioctl_ops;
1170
1171         video_set_drvdata(&video->video, video);
1172
1173         /* ... and the buffers queue... */
1174         video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
1175         if (IS_ERR(video->alloc_ctx)) {
1176                 ret = PTR_ERR(video->alloc_ctx);
1177                 goto error;
1178         }
1179
1180         video->queue.type = video->type;
1181         video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1182         video->queue.lock = &video->lock;
1183         video->queue.drv_priv = video;
1184         video->queue.buf_struct_size = sizeof(struct vsp1_video_buffer);
1185         video->queue.ops = &vsp1_video_queue_qops;
1186         video->queue.mem_ops = &vb2_dma_contig_memops;
1187         video->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1188         ret = vb2_queue_init(&video->queue);
1189         if (ret < 0) {
1190                 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
1191                 goto error;
1192         }
1193
1194         /* ... and register the video device. */
1195         video->video.queue = &video->queue;
1196         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1197         if (ret < 0) {
1198                 dev_err(video->vsp1->dev, "failed to register video device\n");
1199                 goto error;
1200         }
1201
1202         return 0;
1203
1204 error:
1205         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1206         vsp1_video_cleanup(video);
1207         return ret;
1208 }
1209
1210 void vsp1_video_cleanup(struct vsp1_video *video)
1211 {
1212         if (video_is_registered(&video->video))
1213                 video_unregister_device(&video->video);
1214
1215         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1216         media_entity_cleanup(&video->video.entity);
1217 }