drivers/media/platform/vsp1/vsp1_video.c

   1 /*
   2  * vsp1_video.c  --  R-Car VSP1 Video Node
   3  *
   4  * Copyright (C) 2013-2015 Renesas Electronics Corporation
   5  *
   6  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/list.h>
  15 #include <linux/module.h>
  16 #include <linux/mutex.h>
  17 #include <linux/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-v4l2.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         { V4L2_PIX_FMT_YVU420M, MEDIA_BUS_FMT_AYUV8_1X32,
 134           VI6_FMT_Y_U_V_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 135           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 136           3, { 8, 8, 8 }, false, true, 2, 2, false },
 137         { V4L2_PIX_FMT_YUV422M, MEDIA_BUS_FMT_AYUV8_1X32,
 138           VI6_FMT_Y_U_V_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 139           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 140           3, { 8, 8, 8 }, false, false, 2, 1, false },
 141         { V4L2_PIX_FMT_YVU422M, MEDIA_BUS_FMT_AYUV8_1X32,
 142           VI6_FMT_Y_U_V_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 143           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 144           3, { 8, 8, 8 }, false, true, 2, 1, false },
 145         { V4L2_PIX_FMT_YUV444M, MEDIA_BUS_FMT_AYUV8_1X32,
 146           VI6_FMT_Y_U_V_444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 147           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 148           3, { 8, 8, 8 }, false, false, 1, 1, false },
 149         { V4L2_PIX_FMT_YVU444M, MEDIA_BUS_FMT_AYUV8_1X32,
 150           VI6_FMT_Y_U_V_444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 151           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 152           3, { 8, 8, 8 }, false, true, 1, 1, false },
 153 };
 154
 155 /*
 156  * vsp1_get_format_info - Retrieve format information for a 4CC
 157  * @fourcc: the format 4CC
 158  *
 159  * Return a pointer to the format information structure corresponding to the
 160  * given V4L2 format 4CC, or NULL if no corresponding format can be found.
 161  */
 162 static const struct vsp1_format_info *vsp1_get_format_info(u32 fourcc)
 163 {
 164         unsigned int i;
 165
 166         for (i = 0; i < ARRAY_SIZE(vsp1_video_formats); ++i) {
 167                 const struct vsp1_format_info *info = &vsp1_video_formats[i];
 168
 169                 if (info->fourcc == fourcc)
 170                         return info;
 171         }
 172
 173         return NULL;
 174 }
 175
 176
 177 static struct v4l2_subdev *
 178 vsp1_video_remote_subdev(struct media_pad *local, u32 *pad)
 179 {
 180         struct media_pad *remote;
 181
 182         remote = media_entity_remote_pad(local);
 183         if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
 184                 return NULL;
 185
 186         if (pad)
 187                 *pad = remote->index;
 188
 189         return media_entity_to_v4l2_subdev(remote->entity);
 190 }
 191
 192 static int vsp1_video_verify_format(struct vsp1_video *video)
 193 {
 194         struct v4l2_subdev_format fmt;
 195         struct v4l2_subdev *subdev;
 196         int ret;
 197
 198         subdev = vsp1_video_remote_subdev(&video->pad, &fmt.pad);
 199         if (subdev == NULL)
 200                 return -EINVAL;
 201
 202         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 203         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 204         if (ret < 0)
 205                 return ret == -ENOIOCTLCMD ? -EINVAL : ret;
 206
 207         if (video->rwpf->fmtinfo->mbus != fmt.format.code ||
 208             video->rwpf->format.height != fmt.format.height ||
 209             video->rwpf->format.width != fmt.format.width)
 210                 return -EINVAL;
 211
 212         return 0;
 213 }
 214
 215 static int __vsp1_video_try_format(struct vsp1_video *video,
 216                                    struct v4l2_pix_format_mplane *pix,
 217                                    const struct vsp1_format_info **fmtinfo)
 218 {
 219         static const u32 xrgb_formats[][2] = {
 220                 { V4L2_PIX_FMT_RGB444, V4L2_PIX_FMT_XRGB444 },
 221                 { V4L2_PIX_FMT_RGB555, V4L2_PIX_FMT_XRGB555 },
 222                 { V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_XBGR32 },
 223                 { V4L2_PIX_FMT_RGB32, V4L2_PIX_FMT_XRGB32 },
 224         };
 225
 226         const struct vsp1_format_info *info;
 227         unsigned int width = pix->width;
 228         unsigned int height = pix->height;
 229         unsigned int i;
 230
 231         /* Backward compatibility: replace deprecated RGB formats by their XRGB
 232          * equivalent. This selects the format older userspace applications want
 233          * while still exposing the new format.
 234          */
 235         for (i = 0; i < ARRAY_SIZE(xrgb_formats); ++i) {
 236                 if (xrgb_formats[i][0] == pix->pixelformat) {
 237                         pix->pixelformat = xrgb_formats[i][1];
 238                         break;
 239                 }
 240         }
 241
 242         /* Retrieve format information and select the default format if the
 243          * requested format isn't supported.
 244          */
 245         info = vsp1_get_format_info(pix->pixelformat);
 246         if (info == NULL)
 247                 info = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
 248
 249         pix->pixelformat = info->fourcc;
 250         pix->colorspace = V4L2_COLORSPACE_SRGB;
 251         pix->field = V4L2_FIELD_NONE;
 252         memset(pix->reserved, 0, sizeof(pix->reserved));
 253
 254         /* Align the width and height for YUV 4:2:2 and 4:2:0 formats. */
 255         width = round_down(width, info->hsub);
 256         height = round_down(height, info->vsub);
 257
 258         /* Clamp the width and height. */
 259         pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH);
 260         pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT,
 261                             VSP1_VIDEO_MAX_HEIGHT);
 262
 263         /* Compute and clamp the stride and image size. While not documented in
 264          * the datasheet, strides not aligned to a multiple of 128 bytes result
 265          * in image corruption.
 266          */
 267         for (i = 0; i < min(info->planes, 2U); ++i) {
 268                 unsigned int hsub = i > 0 ? info->hsub : 1;
 269                 unsigned int vsub = i > 0 ? info->vsub : 1;
 270                 unsigned int align = 128;
 271                 unsigned int bpl;
 272
 273                 bpl = clamp_t(unsigned int, pix->plane_fmt[i].bytesperline,
 274                               pix->width / hsub * info->bpp[i] / 8,
 275                               round_down(65535U, align));
 276
 277                 pix->plane_fmt[i].bytesperline = round_up(bpl, align);
 278                 pix->plane_fmt[i].sizeimage = pix->plane_fmt[i].bytesperline
 279                                             * pix->height / vsub;
 280         }
 281
 282         if (info->planes == 3) {
 283                 /* The second and third planes must have the same stride. */
 284                 pix->plane_fmt[2].bytesperline = pix->plane_fmt[1].bytesperline;
 285                 pix->plane_fmt[2].sizeimage = pix->plane_fmt[1].sizeimage;
 286         }
 287
 288         pix->num_planes = info->planes;
 289
 290         if (fmtinfo)
 291                 *fmtinfo = info;
 292
 293         return 0;
 294 }
 295
 296 /* -----------------------------------------------------------------------------
 297  * Pipeline Management
 298  */
 299
 300 static int vsp1_pipeline_validate_branch(struct vsp1_pipeline *pipe,
 301                                          struct vsp1_rwpf *input,
 302                                          struct vsp1_rwpf *output)
 303 {
 304         struct vsp1_entity *entity;
 305         struct media_entity_enum ent_enum;
 306         struct media_pad *pad;
 307         int rval;
 308         bool bru_found = false;
 309
 310         input->location.left = 0;
 311         input->location.top = 0;
 312
 313         rval = media_entity_enum_init(
 314                 &ent_enum, input->entity.pads[RWPF_PAD_SOURCE].graph_obj.mdev);
 315         if (rval)
 316                 return rval;
 317
 318         pad = media_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
 319
 320         while (1) {
 321                 if (pad == NULL) {
 322                         rval = -EPIPE;
 323                         goto out;
 324                 }
 325
 326                 /* We've reached a video node, that shouldn't have happened. */
 327                 if (!is_media_entity_v4l2_subdev(pad->entity)) {
 328                         rval = -EPIPE;
 329                         goto out;
 330                 }
 331
 332                 entity = to_vsp1_entity(
 333                         media_entity_to_v4l2_subdev(pad->entity));
 334
 335                 /* A BRU is present in the pipeline, store the compose rectangle
 336                  * location in the input RPF for use when configuring the RPF.
 337                  */
 338                 if (entity->type == VSP1_ENTITY_BRU) {
 339                         struct vsp1_bru *bru = to_bru(&entity->subdev);
 340                         struct v4l2_rect *rect =
 341                                 &bru->inputs[pad->index].compose;
 342
 343                         bru->inputs[pad->index].rpf = input;
 344
 345                         input->location.left = rect->left;
 346                         input->location.top = rect->top;
 347
 348                         bru_found = true;
 349                 }
 350
 351                 /* We've reached the WPF, we're done. */
 352                 if (entity->type == VSP1_ENTITY_WPF)
 353                         break;
 354
 355                 /* Ensure the branch has no loop. */
 356                 if (media_entity_enum_test_and_set(&ent_enum,
 357                                                    &entity->subdev.entity)) {
 358                         rval = -EPIPE;
 359                         goto out;
 360                 }
 361
 362                 /* UDS can't be chained. */
 363                 if (entity->type == VSP1_ENTITY_UDS) {
 364                         if (pipe->uds) {
 365                                 rval = -EPIPE;
 366                                 goto out;
 367                         }
 368
 369                         pipe->uds = entity;
 370                         pipe->uds_input = bru_found ? pipe->bru
 371                                         : &input->entity;
 372                 }
 373
 374                 /* Follow the source link. The link setup operations ensure
 375                  * that the output fan-out can't be more than one, there is thus
 376                  * no need to verify here that only a single source link is
 377                  * activated.
 378                  */
 379                 pad = &entity->pads[entity->source_pad];
 380                 pad = media_entity_remote_pad(pad);
 381         }
 382
 383         /* The last entity must be the output WPF. */
 384         if (entity != &output->entity)
 385                 rval = -EPIPE;
 386
 387 out:
 388         media_entity_enum_cleanup(&ent_enum);
 389
 390         return rval;
 391 }
 392
 393 static void __vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
 394 {
 395         if (pipe->bru) {
 396                 struct vsp1_bru *bru = to_bru(&pipe->bru->subdev);
 397                 unsigned int i;
 398
 399                 for (i = 0; i < ARRAY_SIZE(bru->inputs); ++i)
 400                         bru->inputs[i].rpf = NULL;
 401         }
 402
 403         INIT_LIST_HEAD(&pipe->entities);
 404         pipe->state = VSP1_PIPELINE_STOPPED;
 405         pipe->buffers_ready = 0;
 406         pipe->num_inputs = 0;
 407         pipe->output = NULL;
 408         pipe->bru = NULL;
 409         pipe->lif = NULL;
 410         pipe->uds = NULL;
 411 }
 412
 413 static int vsp1_pipeline_validate(struct vsp1_pipeline *pipe,
 414                                   struct vsp1_video *video)
 415 {
 416         struct media_entity_graph graph;
 417         struct media_entity *entity = &video->video.entity;
 418         struct media_device *mdev = entity->graph_obj.mdev;
 419         unsigned int i;
 420         int ret;
 421
 422         mutex_lock(&mdev->graph_mutex);
 423
 424         /* Walk the graph to locate the entities and video nodes. */
 425         ret = media_entity_graph_walk_init(&graph, mdev);
 426         if (ret) {
 427                 mutex_unlock(&mdev->graph_mutex);
 428                 return ret;
 429         }
 430
 431         media_entity_graph_walk_start(&graph, entity);
 432
 433         while ((entity = media_entity_graph_walk_next(&graph))) {
 434                 struct v4l2_subdev *subdev;
 435                 struct vsp1_rwpf *rwpf;
 436                 struct vsp1_entity *e;
 437
 438                 if (is_media_entity_v4l2_io(entity))
 439                         continue;
 440
 441                 subdev = media_entity_to_v4l2_subdev(entity);
 442                 e = to_vsp1_entity(subdev);
 443                 list_add_tail(&e->list_pipe, &pipe->entities);
 444
 445                 if (e->type == VSP1_ENTITY_RPF) {
 446                         rwpf = to_rwpf(subdev);
 447                         pipe->inputs[pipe->num_inputs++] = rwpf;
 448                         rwpf->video->pipe_index = pipe->num_inputs;
 449                 } else if (e->type == VSP1_ENTITY_WPF) {
 450                         rwpf = to_rwpf(subdev);
 451                         pipe->output = to_rwpf(subdev);
 452                         rwpf->video->pipe_index = 0;
 453                 } else if (e->type == VSP1_ENTITY_LIF) {
 454                         pipe->lif = e;
 455                 } else if (e->type == VSP1_ENTITY_BRU) {
 456                         pipe->bru = e;
 457                 }
 458         }
 459
 460         mutex_unlock(&mdev->graph_mutex);
 461
 462         media_entity_graph_walk_cleanup(&graph);
 463
 464         /* We need one output and at least one input. */
 465         if (pipe->num_inputs == 0 || !pipe->output) {
 466                 ret = -EPIPE;
 467                 goto error;
 468         }
 469
 470         /* Follow links downstream for each input and make sure the graph
 471          * contains no loop and that all branches end at the output WPF.
 472          */
 473         for (i = 0; i < pipe->num_inputs; ++i) {
 474                 ret = vsp1_pipeline_validate_branch(pipe, pipe->inputs[i],
 475                                                     pipe->output);
 476                 if (ret < 0)
 477                         goto error;
 478         }
 479
 480         return 0;
 481
 482 error:
 483         __vsp1_pipeline_cleanup(pipe);
 484         return ret;
 485 }
 486
 487 static int vsp1_pipeline_init(struct vsp1_pipeline *pipe,
 488                               struct vsp1_video *video)
 489 {
 490         int ret;
 491
 492         mutex_lock(&pipe->lock);
 493
 494         /* If we're the first user validate and initialize the pipeline. */
 495         if (pipe->use_count == 0) {
 496                 ret = vsp1_pipeline_validate(pipe, video);
 497                 if (ret < 0)
 498                         goto done;
 499         }
 500
 501         pipe->use_count++;
 502         ret = 0;
 503
 504 done:
 505         mutex_unlock(&pipe->lock);
 506         return ret;
 507 }
 508
 509 static void vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
 510 {
 511         mutex_lock(&pipe->lock);
 512
 513         /* If we're the last user clean up the pipeline. */
 514         if (--pipe->use_count == 0)
 515                 __vsp1_pipeline_cleanup(pipe);
 516
 517         mutex_unlock(&pipe->lock);
 518 }
 519
 520 static void vsp1_pipeline_run(struct vsp1_pipeline *pipe)
 521 {
 522         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 523
 524         vsp1_write(vsp1, VI6_CMD(pipe->output->entity.index), VI6_CMD_STRCMD);
 525         pipe->state = VSP1_PIPELINE_RUNNING;
 526         pipe->buffers_ready = 0;
 527 }
 528
 529 static bool vsp1_pipeline_stopped(struct vsp1_pipeline *pipe)
 530 {
 531         unsigned long flags;
 532         bool stopped;
 533
 534         spin_lock_irqsave(&pipe->irqlock, flags);
 535         stopped = pipe->state == VSP1_PIPELINE_STOPPED;
 536         spin_unlock_irqrestore(&pipe->irqlock, flags);
 537
 538         return stopped;
 539 }
 540
 541 static int vsp1_pipeline_stop(struct vsp1_pipeline *pipe)
 542 {
 543         struct vsp1_entity *entity;
 544         unsigned long flags;
 545         int ret;
 546
 547         spin_lock_irqsave(&pipe->irqlock, flags);
 548         if (pipe->state == VSP1_PIPELINE_RUNNING)
 549                 pipe->state = VSP1_PIPELINE_STOPPING;
 550         spin_unlock_irqrestore(&pipe->irqlock, flags);
 551
 552         ret = wait_event_timeout(pipe->wq, vsp1_pipeline_stopped(pipe),
 553                                  msecs_to_jiffies(500));
 554         ret = ret == 0 ? -ETIMEDOUT : 0;
 555
 556         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 557                 if (entity->route && entity->route->reg)
 558                         vsp1_write(entity->vsp1, entity->route->reg,
 559                                    VI6_DPR_NODE_UNUSED);
 560
 561                 v4l2_subdev_call(&entity->subdev, video, s_stream, 0);
 562         }
 563
 564         return ret;
 565 }
 566
 567 static bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe)
 568 {
 569         unsigned int mask;
 570
 571         mask = ((1 << pipe->num_inputs) - 1) << 1;
 572         if (!pipe->lif)
 573                 mask |= 1 << 0;
 574
 575         return pipe->buffers_ready == mask;
 576 }
 577
 578 /*
 579  * vsp1_video_complete_buffer - Complete the current buffer
 580  * @video: the video node
 581  *
 582  * This function completes the current buffer by filling its sequence number,
 583  * time stamp and payload size, and hands it back to the videobuf core.
 584  *
 585  * When operating in DU output mode (deep pipeline to the DU through the LIF),
 586  * the VSP1 needs to constantly supply frames to the display. In that case, if
 587  * no other buffer is queued, reuse the one that has just been processed instead
 588  * of handing it back to the videobuf core.
 589  *
 590  * Return the next queued buffer or NULL if the queue is empty.
 591  */
 592 static struct vsp1_vb2_buffer *
 593 vsp1_video_complete_buffer(struct vsp1_video *video)
 594 {
 595         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 596         struct vsp1_vb2_buffer *next = NULL;
 597         struct vsp1_vb2_buffer *done;
 598         unsigned long flags;
 599         unsigned int i;
 600
 601         spin_lock_irqsave(&video->irqlock, flags);
 602
 603         if (list_empty(&video->irqqueue)) {
 604                 spin_unlock_irqrestore(&video->irqlock, flags);
 605                 return NULL;
 606         }
 607
 608         done = list_first_entry(&video->irqqueue,
 609                                 struct vsp1_vb2_buffer, queue);
 610
 611         /* In DU output mode reuse the buffer if the list is singular. */
 612         if (pipe->lif && list_is_singular(&video->irqqueue)) {
 613                 spin_unlock_irqrestore(&video->irqlock, flags);
 614                 return done;
 615         }
 616
 617         list_del(&done->queue);
 618
 619         if (!list_empty(&video->irqqueue))
 620                 next = list_first_entry(&video->irqqueue,
 621                                         struct vsp1_vb2_buffer, queue);
 622
 623         spin_unlock_irqrestore(&video->irqlock, flags);
 624
 625         done->buf.sequence = video->sequence++;
 626         done->buf.vb2_buf.timestamp = ktime_get_ns();
 627         for (i = 0; i < done->buf.vb2_buf.num_planes; ++i)
 628                 vb2_set_plane_payload(&done->buf.vb2_buf, i,
 629                                       done->mem.length[i]);
 630         vb2_buffer_done(&done->buf.vb2_buf, VB2_BUF_STATE_DONE);
 631
 632         return next;
 633 }
 634
 635 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
 636                                  struct vsp1_rwpf *rwpf)
 637 {
 638         struct vsp1_video *video = rwpf->video;
 639         struct vsp1_vb2_buffer *buf;
 640         unsigned long flags;
 641
 642         buf = vsp1_video_complete_buffer(video);
 643         if (buf == NULL)
 644                 return;
 645
 646         spin_lock_irqsave(&pipe->irqlock, flags);
 647
 648         video->rwpf->ops->set_memory(video->rwpf, &buf->mem);
 649         pipe->buffers_ready |= 1 << video->pipe_index;
 650
 651         spin_unlock_irqrestore(&pipe->irqlock, flags);
 652 }
 653
 654 static void vsp1_video_pipeline_frame_end(struct vsp1_pipeline *pipe)
 655 {
 656         unsigned int i;
 657
 658         /* Complete buffers on all video nodes. */
 659         for (i = 0; i < pipe->num_inputs; ++i)
 660                 vsp1_video_frame_end(pipe, pipe->inputs[i]);
 661
 662         if (!pipe->lif)
 663                 vsp1_video_frame_end(pipe, pipe->output);
 664 }
 665
 666 void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
 667 {
 668         enum vsp1_pipeline_state state;
 669         unsigned long flags;
 670
 671         if (pipe == NULL)
 672                 return;
 673
 674         /* Signal frame end to the pipeline handler. */
 675         pipe->frame_end(pipe);
 676
 677         spin_lock_irqsave(&pipe->irqlock, flags);
 678
 679         state = pipe->state;
 680         pipe->state = VSP1_PIPELINE_STOPPED;
 681
 682         /* If a stop has been requested, mark the pipeline as stopped and
 683          * return.
 684          */
 685         if (state == VSP1_PIPELINE_STOPPING) {
 686                 wake_up(&pipe->wq);
 687                 goto done;
 688         }
 689
 690         /* Restart the pipeline if ready. */
 691         if (vsp1_pipeline_ready(pipe))
 692                 vsp1_pipeline_run(pipe);
 693
 694 done:
 695         spin_unlock_irqrestore(&pipe->irqlock, flags);
 696 }
 697
 698 /*
 699  * Propagate the alpha value through the pipeline.
 700  *
 701  * As the UDS has restricted scaling capabilities when the alpha component needs
 702  * to be scaled, we disable alpha scaling when the UDS input has a fixed alpha
 703  * value. The UDS then outputs a fixed alpha value which needs to be programmed
 704  * from the input RPF alpha.
 705  */
 706 void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe,
 707                                    struct vsp1_entity *input,
 708                                    unsigned int alpha)
 709 {
 710         struct vsp1_entity *entity;
 711         struct media_pad *pad;
 712
 713         pad = media_entity_remote_pad(&input->pads[RWPF_PAD_SOURCE]);
 714
 715         while (pad) {
 716                 if (!is_media_entity_v4l2_subdev(pad->entity))
 717                         break;
 718
 719                 entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
 720
 721                 /* The BRU background color has a fixed alpha value set to 255,
 722                  * the output alpha value is thus always equal to 255.
 723                  */
 724                 if (entity->type == VSP1_ENTITY_BRU)
 725                         alpha = 255;
 726
 727                 if (entity->type == VSP1_ENTITY_UDS) {
 728                         struct vsp1_uds *uds = to_uds(&entity->subdev);
 729
 730                         vsp1_uds_set_alpha(uds, alpha);
 731                         break;
 732                 }
 733
 734                 pad = &entity->pads[entity->source_pad];
 735                 pad = media_entity_remote_pad(pad);
 736         }
 737 }
 738
 739 void vsp1_pipelines_suspend(struct vsp1_device *vsp1)
 740 {
 741         unsigned long flags;
 742         unsigned int i;
 743         int ret;
 744
 745         /* To avoid increasing the system suspend time needlessly, loop over the
 746          * pipelines twice, first to set them all to the stopping state, and then
 747          * to wait for the stop to complete.
 748          */
 749         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
 750                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 751                 struct vsp1_pipeline *pipe;
 752
 753                 if (wpf == NULL)
 754                         continue;
 755
 756                 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
 757                 if (pipe == NULL)
 758                         continue;
 759
 760                 spin_lock_irqsave(&pipe->irqlock, flags);
 761                 if (pipe->state == VSP1_PIPELINE_RUNNING)
 762                         pipe->state = VSP1_PIPELINE_STOPPING;
 763                 spin_unlock_irqrestore(&pipe->irqlock, flags);
 764         }
 765
 766         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
 767                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 768                 struct vsp1_pipeline *pipe;
 769
 770                 if (wpf == NULL)
 771                         continue;
 772
 773                 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
 774                 if (pipe == NULL)
 775                         continue;
 776
 777                 ret = wait_event_timeout(pipe->wq, vsp1_pipeline_stopped(pipe),
 778                                          msecs_to_jiffies(500));
 779                 if (ret == 0)
 780                         dev_warn(vsp1->dev, "pipeline %u stop timeout\n",
 781                                  wpf->entity.index);
 782         }
 783 }
 784
 785 void vsp1_pipelines_resume(struct vsp1_device *vsp1)
 786 {
 787         unsigned int i;
 788
 789         /* Resume pipeline all running pipelines. */
 790         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
 791                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 792                 struct vsp1_pipeline *pipe;
 793
 794                 if (wpf == NULL)
 795                         continue;
 796
 797                 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
 798                 if (pipe == NULL)
 799                         continue;
 800
 801                 if (vsp1_pipeline_ready(pipe))
 802                         vsp1_pipeline_run(pipe);
 803         }
 804 }
 805
 806 /* -----------------------------------------------------------------------------
 807  * videobuf2 Queue Operations
 808  */
 809
 810 static int
 811 vsp1_video_queue_setup(struct vb2_queue *vq,
 812                      unsigned int *nbuffers, unsigned int *nplanes,
 813                      unsigned int sizes[], void *alloc_ctxs[])
 814 {
 815         struct vsp1_video *video = vb2_get_drv_priv(vq);
 816         const struct v4l2_pix_format_mplane *format = &video->rwpf->format;
 817         unsigned int i;
 818
 819         if (*nplanes) {
 820                 if (*nplanes != format->num_planes)
 821                         return -EINVAL;
 822
 823                 for (i = 0; i < *nplanes; i++) {
 824                         if (sizes[i] < format->plane_fmt[i].sizeimage)
 825                                 return -EINVAL;
 826                         alloc_ctxs[i] = video->alloc_ctx;
 827                 }
 828                 return 0;
 829         }
 830
 831         *nplanes = format->num_planes;
 832
 833         for (i = 0; i < format->num_planes; ++i) {
 834                 sizes[i] = format->plane_fmt[i].sizeimage;
 835                 alloc_ctxs[i] = video->alloc_ctx;
 836         }
 837
 838         return 0;
 839 }
 840
 841 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
 842 {
 843         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 844         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 845         struct vsp1_vb2_buffer *buf = to_vsp1_vb2_buffer(vbuf);
 846         const struct v4l2_pix_format_mplane *format = &video->rwpf->format;
 847         unsigned int i;
 848
 849         if (vb->num_planes < format->num_planes)
 850                 return -EINVAL;
 851
 852         buf->mem.num_planes = vb->num_planes;
 853
 854         for (i = 0; i < vb->num_planes; ++i) {
 855                 buf->mem.addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 856                 buf->mem.length[i] = vb2_plane_size(vb, i);
 857
 858                 if (buf->mem.length[i] < format->plane_fmt[i].sizeimage)
 859                         return -EINVAL;
 860         }
 861
 862         return 0;
 863 }
 864
 865 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
 866 {
 867         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 868         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 869         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 870         struct vsp1_vb2_buffer *buf = to_vsp1_vb2_buffer(vbuf);
 871         unsigned long flags;
 872         bool empty;
 873
 874         spin_lock_irqsave(&video->irqlock, flags);
 875         empty = list_empty(&video->irqqueue);
 876         list_add_tail(&buf->queue, &video->irqqueue);
 877         spin_unlock_irqrestore(&video->irqlock, flags);
 878
 879         if (!empty)
 880                 return;
 881
 882         spin_lock_irqsave(&pipe->irqlock, flags);
 883
 884         video->rwpf->ops->set_memory(video->rwpf, &buf->mem);
 885         pipe->buffers_ready |= 1 << video->pipe_index;
 886
 887         if (vb2_is_streaming(&video->queue) &&
 888             vsp1_pipeline_ready(pipe))
 889                 vsp1_pipeline_run(pipe);
 890
 891         spin_unlock_irqrestore(&pipe->irqlock, flags);
 892 }
 893
 894 static void vsp1_entity_route_setup(struct vsp1_entity *source)
 895 {
 896         struct vsp1_entity *sink;
 897
 898         if (source->route->reg == 0)
 899                 return;
 900
 901         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
 902         vsp1_write(source->vsp1, source->route->reg,
 903                    sink->route->inputs[source->sink_pad]);
 904 }
 905
 906 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 907 {
 908         struct vsp1_video *video = vb2_get_drv_priv(vq);
 909         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 910         struct vsp1_entity *entity;
 911         unsigned long flags;
 912         int ret;
 913
 914         mutex_lock(&pipe->lock);
 915         if (pipe->stream_count == pipe->num_inputs) {
 916                 if (pipe->uds) {
 917                         struct vsp1_uds *uds = to_uds(&pipe->uds->subdev);
 918
 919                         /* If a BRU is present in the pipeline before the UDS,
 920                          * the alpha component doesn't need to be scaled as the
 921                          * BRU output alpha value is fixed to 255. Otherwise we
 922                          * need to scale the alpha component only when available
 923                          * at the input RPF.
 924                          */
 925                         if (pipe->uds_input->type == VSP1_ENTITY_BRU) {
 926                                 uds->scale_alpha = false;
 927                         } else {
 928                                 struct vsp1_rwpf *rpf =
 929                                         to_rwpf(&pipe->uds_input->subdev);
 930
 931                                 uds->scale_alpha = rpf->fmtinfo->alpha;
 932                         }
 933                 }
 934
 935                 list_for_each_entry(entity, &pipe->entities, list_pipe) {
 936                         vsp1_entity_route_setup(entity);
 937
 938                         ret = v4l2_subdev_call(&entity->subdev, video,
 939                                                s_stream, 1);
 940                         if (ret < 0) {
 941                                 mutex_unlock(&pipe->lock);
 942                                 return ret;
 943                         }
 944                 }
 945         }
 946
 947         pipe->stream_count++;
 948         mutex_unlock(&pipe->lock);
 949
 950         spin_lock_irqsave(&pipe->irqlock, flags);
 951         if (vsp1_pipeline_ready(pipe))
 952                 vsp1_pipeline_run(pipe);
 953         spin_unlock_irqrestore(&pipe->irqlock, flags);
 954
 955         return 0;
 956 }
 957
 958 static void vsp1_video_stop_streaming(struct vb2_queue *vq)
 959 {
 960         struct vsp1_video *video = vb2_get_drv_priv(vq);
 961         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 962         struct vsp1_vb2_buffer *buffer;
 963         unsigned long flags;
 964         int ret;
 965
 966         mutex_lock(&pipe->lock);
 967         if (--pipe->stream_count == 0) {
 968                 /* Stop the pipeline. */
 969                 ret = vsp1_pipeline_stop(pipe);
 970                 if (ret == -ETIMEDOUT)
 971                         dev_err(video->vsp1->dev, "pipeline stop timeout\n");
 972         }
 973         mutex_unlock(&pipe->lock);
 974
 975         vsp1_pipeline_cleanup(pipe);
 976         media_entity_pipeline_stop(&video->video.entity);
 977
 978         /* Remove all buffers from the IRQ queue. */
 979         spin_lock_irqsave(&video->irqlock, flags);
 980         list_for_each_entry(buffer, &video->irqqueue, queue)
 981                 vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR);
 982         INIT_LIST_HEAD(&video->irqqueue);
 983         spin_unlock_irqrestore(&video->irqlock, flags);
 984 }
 985
 986 static struct vb2_ops vsp1_video_queue_qops = {
 987         .queue_setup = vsp1_video_queue_setup,
 988         .buf_prepare = vsp1_video_buffer_prepare,
 989         .buf_queue = vsp1_video_buffer_queue,
 990         .wait_prepare = vb2_ops_wait_prepare,
 991         .wait_finish = vb2_ops_wait_finish,
 992         .start_streaming = vsp1_video_start_streaming,
 993         .stop_streaming = vsp1_video_stop_streaming,
 994 };
 995
 996 /* -----------------------------------------------------------------------------
 997  * V4L2 ioctls
 998  */
 999
1000 static int
1001 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
1002 {
1003         struct v4l2_fh *vfh = file->private_data;
1004         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1005
1006         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
1007                           | V4L2_CAP_VIDEO_CAPTURE_MPLANE
1008                           | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
1009
1010         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1011                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
1012                                  | V4L2_CAP_STREAMING;
1013         else
1014                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
1015                                  | V4L2_CAP_STREAMING;
1016
1017         strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
1018         strlcpy(cap->card, video->video.name, sizeof(cap->card));
1019         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
1020                  dev_name(video->vsp1->dev));
1021
1022         return 0;
1023 }
1024
1025 static int
1026 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
1027 {
1028         struct v4l2_fh *vfh = file->private_data;
1029         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1030
1031         if (format->type != video->queue.type)
1032                 return -EINVAL;
1033
1034         mutex_lock(&video->lock);
1035         format->fmt.pix_mp = video->rwpf->format;
1036         mutex_unlock(&video->lock);
1037
1038         return 0;
1039 }
1040
1041 static int
1042 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
1043 {
1044         struct v4l2_fh *vfh = file->private_data;
1045         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1046
1047         if (format->type != video->queue.type)
1048                 return -EINVAL;
1049
1050         return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
1051 }
1052
1053 static int
1054 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
1055 {
1056         struct v4l2_fh *vfh = file->private_data;
1057         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1058         const struct vsp1_format_info *info;
1059         int ret;
1060
1061         if (format->type != video->queue.type)
1062                 return -EINVAL;
1063
1064         ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
1065         if (ret < 0)
1066                 return ret;
1067
1068         mutex_lock(&video->lock);
1069
1070         if (vb2_is_busy(&video->queue)) {
1071                 ret = -EBUSY;
1072                 goto done;
1073         }
1074
1075         video->rwpf->format = format->fmt.pix_mp;
1076         video->rwpf->fmtinfo = info;
1077
1078 done:
1079         mutex_unlock(&video->lock);
1080         return ret;
1081 }
1082
1083 static int
1084 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1085 {
1086         struct v4l2_fh *vfh = file->private_data;
1087         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1088         struct vsp1_pipeline *pipe;
1089         int ret;
1090
1091         if (video->queue.owner && video->queue.owner != file->private_data)
1092                 return -EBUSY;
1093
1094         video->sequence = 0;
1095
1096         /* Start streaming on the pipeline. No link touching an entity in the
1097          * pipeline can be activated or deactivated once streaming is started.
1098          *
1099          * Use the VSP1 pipeline object embedded in the first video object that
1100          * starts streaming.
1101          */
1102         pipe = video->video.entity.pipe
1103              ? to_vsp1_pipeline(&video->video.entity) : &video->pipe;
1104
1105         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
1106         if (ret < 0)
1107                 return ret;
1108
1109         /* Verify that the configured format matches the output of the connected
1110          * subdev.
1111          */
1112         ret = vsp1_video_verify_format(video);
1113         if (ret < 0)
1114                 goto err_stop;
1115
1116         ret = vsp1_pipeline_init(pipe, video);
1117         if (ret < 0)
1118                 goto err_stop;
1119
1120         /* Start the queue. */
1121         ret = vb2_streamon(&video->queue, type);
1122         if (ret < 0)
1123                 goto err_cleanup;
1124
1125         return 0;
1126
1127 err_cleanup:
1128         vsp1_pipeline_cleanup(pipe);
1129 err_stop:
1130         media_entity_pipeline_stop(&video->video.entity);
1131         return ret;
1132 }
1133
1134 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
1135         .vidioc_querycap                = vsp1_video_querycap,
1136         .vidioc_g_fmt_vid_cap_mplane    = vsp1_video_get_format,
1137         .vidioc_s_fmt_vid_cap_mplane    = vsp1_video_set_format,
1138         .vidioc_try_fmt_vid_cap_mplane  = vsp1_video_try_format,
1139         .vidioc_g_fmt_vid_out_mplane    = vsp1_video_get_format,
1140         .vidioc_s_fmt_vid_out_mplane    = vsp1_video_set_format,
1141         .vidioc_try_fmt_vid_out_mplane  = vsp1_video_try_format,
1142         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1143         .vidioc_querybuf                = vb2_ioctl_querybuf,
1144         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1145         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1146         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1147         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
1148         .vidioc_streamon                = vsp1_video_streamon,
1149         .vidioc_streamoff               = vb2_ioctl_streamoff,
1150 };
1151
1152 /* -----------------------------------------------------------------------------
1153  * V4L2 File Operations
1154  */
1155
1156 static int vsp1_video_open(struct file *file)
1157 {
1158         struct vsp1_video *video = video_drvdata(file);
1159         struct v4l2_fh *vfh;
1160         int ret = 0;
1161
1162         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
1163         if (vfh == NULL)
1164                 return -ENOMEM;
1165
1166         v4l2_fh_init(vfh, &video->video);
1167         v4l2_fh_add(vfh);
1168
1169         file->private_data = vfh;
1170
1171         ret = vsp1_device_get(video->vsp1);
1172         if (ret < 0) {
1173                 v4l2_fh_del(vfh);
1174                 kfree(vfh);
1175         }
1176
1177         return ret;
1178 }
1179
1180 static int vsp1_video_release(struct file *file)
1181 {
1182         struct vsp1_video *video = video_drvdata(file);
1183         struct v4l2_fh *vfh = file->private_data;
1184
1185         mutex_lock(&video->lock);
1186         if (video->queue.owner == vfh) {
1187                 vb2_queue_release(&video->queue);
1188                 video->queue.owner = NULL;
1189         }
1190         mutex_unlock(&video->lock);
1191
1192         vsp1_device_put(video->vsp1);
1193
1194         v4l2_fh_release(file);
1195
1196         file->private_data = NULL;
1197
1198         return 0;
1199 }
1200
1201 static struct v4l2_file_operations vsp1_video_fops = {
1202         .owner = THIS_MODULE,
1203         .unlocked_ioctl = video_ioctl2,
1204         .open = vsp1_video_open,
1205         .release = vsp1_video_release,
1206         .poll = vb2_fop_poll,
1207         .mmap = vb2_fop_mmap,
1208 };
1209
1210 /* -----------------------------------------------------------------------------
1211  * Initialization and Cleanup
1212  */
1213
1214 struct vsp1_video *vsp1_video_create(struct vsp1_device *vsp1,
1215                                      struct vsp1_rwpf *rwpf)
1216 {
1217         struct vsp1_video *video;
1218         const char *direction;
1219         int ret;
1220
1221         video = devm_kzalloc(vsp1->dev, sizeof(*video), GFP_KERNEL);
1222         if (!video)
1223                 return ERR_PTR(-ENOMEM);
1224
1225         rwpf->video = video;
1226
1227         video->vsp1 = vsp1;
1228         video->rwpf = rwpf;
1229
1230         if (rwpf->entity.type == VSP1_ENTITY_RPF) {
1231                 direction = "input";
1232                 video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
1233                 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1234                 video->video.vfl_dir = VFL_DIR_TX;
1235         } else {
1236                 direction = "output";
1237                 video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1238                 video->pad.flags = MEDIA_PAD_FL_SINK;
1239                 video->video.vfl_dir = VFL_DIR_RX;
1240         }
1241
1242         mutex_init(&video->lock);
1243         spin_lock_init(&video->irqlock);
1244         INIT_LIST_HEAD(&video->irqqueue);
1245
1246         mutex_init(&video->pipe.lock);
1247         spin_lock_init(&video->pipe.irqlock);
1248         INIT_LIST_HEAD(&video->pipe.entities);
1249         init_waitqueue_head(&video->pipe.wq);
1250         video->pipe.state = VSP1_PIPELINE_STOPPED;
1251         video->pipe.frame_end = vsp1_video_pipeline_frame_end;
1252
1253         /* Initialize the media entity... */
1254         ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
1255         if (ret < 0)
1256                 return ERR_PTR(ret);
1257
1258         /* ... and the format ... */
1259         rwpf->fmtinfo = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
1260         rwpf->format.pixelformat = rwpf->fmtinfo->fourcc;
1261         rwpf->format.colorspace = V4L2_COLORSPACE_SRGB;
1262         rwpf->format.field = V4L2_FIELD_NONE;
1263         rwpf->format.width = VSP1_VIDEO_DEF_WIDTH;
1264         rwpf->format.height = VSP1_VIDEO_DEF_HEIGHT;
1265         rwpf->format.num_planes = 1;
1266         rwpf->format.plane_fmt[0].bytesperline =
1267                 rwpf->format.width * rwpf->fmtinfo->bpp[0] / 8;
1268         rwpf->format.plane_fmt[0].sizeimage =
1269                 rwpf->format.plane_fmt[0].bytesperline * rwpf->format.height;
1270
1271         /* ... and the video node... */
1272         video->video.v4l2_dev = &video->vsp1->v4l2_dev;
1273         video->video.fops = &vsp1_video_fops;
1274         snprintf(video->video.name, sizeof(video->video.name), "%s %s",
1275                  rwpf->entity.subdev.name, direction);
1276         video->video.vfl_type = VFL_TYPE_GRABBER;
1277         video->video.release = video_device_release_empty;
1278         video->video.ioctl_ops = &vsp1_video_ioctl_ops;
1279
1280         video_set_drvdata(&video->video, video);
1281
1282         /* ... and the buffers queue... */
1283         video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
1284         if (IS_ERR(video->alloc_ctx)) {
1285                 ret = PTR_ERR(video->alloc_ctx);
1286                 goto error;
1287         }
1288
1289         video->queue.type = video->type;
1290         video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1291         video->queue.lock = &video->lock;
1292         video->queue.drv_priv = video;
1293         video->queue.buf_struct_size = sizeof(struct vsp1_vb2_buffer);
1294         video->queue.ops = &vsp1_video_queue_qops;
1295         video->queue.mem_ops = &vb2_dma_contig_memops;
1296         video->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1297         ret = vb2_queue_init(&video->queue);
1298         if (ret < 0) {
1299                 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
1300                 goto error;
1301         }
1302
1303         /* ... and register the video device. */
1304         video->video.queue = &video->queue;
1305         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1306         if (ret < 0) {
1307                 dev_err(video->vsp1->dev, "failed to register video device\n");
1308                 goto error;
1309         }
1310
1311         return video;
1312
1313 error:
1314         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1315         vsp1_video_cleanup(video);
1316         return ERR_PTR(ret);
1317 }
1318
1319 void vsp1_video_cleanup(struct vsp1_video *video)
1320 {
1321         if (video_is_registered(&video->video))
1322                 video_unregister_device(&video->video);
1323
1324         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1325         media_entity_cleanup(&video->video.entity);
1326 }