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_video = 0;
 407         pipe->num_inputs = 0;
 408         pipe->output = NULL;
 409         pipe->bru = NULL;
 410         pipe->lif = NULL;
 411         pipe->uds = NULL;
 412 }
 413
 414 static int vsp1_pipeline_validate(struct vsp1_pipeline *pipe,
 415                                   struct vsp1_video *video)
 416 {
 417         struct media_entity_graph graph;
 418         struct media_entity *entity = &video->video.entity;
 419         struct media_device *mdev = entity->graph_obj.mdev;
 420         unsigned int i;
 421         int ret;
 422
 423         mutex_lock(&mdev->graph_mutex);
 424
 425         /* Walk the graph to locate the entities and video nodes. */
 426         ret = media_entity_graph_walk_init(&graph, mdev);
 427         if (ret) {
 428                 mutex_unlock(&mdev->graph_mutex);
 429                 return ret;
 430         }
 431
 432         media_entity_graph_walk_start(&graph, entity);
 433
 434         while ((entity = media_entity_graph_walk_next(&graph))) {
 435                 struct v4l2_subdev *subdev;
 436                 struct vsp1_rwpf *rwpf;
 437                 struct vsp1_entity *e;
 438
 439                 if (is_media_entity_v4l2_io(entity)) {
 440                         pipe->num_video++;
 441                         continue;
 442                 }
 443
 444                 subdev = media_entity_to_v4l2_subdev(entity);
 445                 e = to_vsp1_entity(subdev);
 446                 list_add_tail(&e->list_pipe, &pipe->entities);
 447
 448                 if (e->type == VSP1_ENTITY_RPF) {
 449                         rwpf = to_rwpf(subdev);
 450                         pipe->inputs[pipe->num_inputs++] = rwpf;
 451                         rwpf->video.pipe_index = pipe->num_inputs;
 452                 } else if (e->type == VSP1_ENTITY_WPF) {
 453                         rwpf = to_rwpf(subdev);
 454                         pipe->output = to_rwpf(subdev);
 455                         rwpf->video.pipe_index = 0;
 456                 } else if (e->type == VSP1_ENTITY_LIF) {
 457                         pipe->lif = e;
 458                 } else if (e->type == VSP1_ENTITY_BRU) {
 459                         pipe->bru = e;
 460                 }
 461         }
 462
 463         mutex_unlock(&mdev->graph_mutex);
 464
 465         media_entity_graph_walk_cleanup(&graph);
 466
 467         /* We need one output and at least one input. */
 468         if (pipe->num_inputs == 0 || !pipe->output) {
 469                 ret = -EPIPE;
 470                 goto error;
 471         }
 472
 473         /* Follow links downstream for each input and make sure the graph
 474          * contains no loop and that all branches end at the output WPF.
 475          */
 476         for (i = 0; i < pipe->num_inputs; ++i) {
 477                 ret = vsp1_pipeline_validate_branch(pipe, pipe->inputs[i],
 478                                                     pipe->output);
 479                 if (ret < 0)
 480                         goto error;
 481         }
 482
 483         return 0;
 484
 485 error:
 486         __vsp1_pipeline_cleanup(pipe);
 487         return ret;
 488 }
 489
 490 static int vsp1_pipeline_init(struct vsp1_pipeline *pipe,
 491                               struct vsp1_video *video)
 492 {
 493         int ret;
 494
 495         mutex_lock(&pipe->lock);
 496
 497         /* If we're the first user validate and initialize the pipeline. */
 498         if (pipe->use_count == 0) {
 499                 ret = vsp1_pipeline_validate(pipe, video);
 500                 if (ret < 0)
 501                         goto done;
 502         }
 503
 504         pipe->use_count++;
 505         ret = 0;
 506
 507 done:
 508         mutex_unlock(&pipe->lock);
 509         return ret;
 510 }
 511
 512 static void vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
 513 {
 514         mutex_lock(&pipe->lock);
 515
 516         /* If we're the last user clean up the pipeline. */
 517         if (--pipe->use_count == 0)
 518                 __vsp1_pipeline_cleanup(pipe);
 519
 520         mutex_unlock(&pipe->lock);
 521 }
 522
 523 static void vsp1_pipeline_run(struct vsp1_pipeline *pipe)
 524 {
 525         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 526
 527         vsp1_write(vsp1, VI6_CMD(pipe->output->entity.index), VI6_CMD_STRCMD);
 528         pipe->state = VSP1_PIPELINE_RUNNING;
 529         pipe->buffers_ready = 0;
 530 }
 531
 532 static bool vsp1_pipeline_stopped(struct vsp1_pipeline *pipe)
 533 {
 534         unsigned long flags;
 535         bool stopped;
 536
 537         spin_lock_irqsave(&pipe->irqlock, flags);
 538         stopped = pipe->state == VSP1_PIPELINE_STOPPED;
 539         spin_unlock_irqrestore(&pipe->irqlock, flags);
 540
 541         return stopped;
 542 }
 543
 544 static int vsp1_pipeline_stop(struct vsp1_pipeline *pipe)
 545 {
 546         struct vsp1_entity *entity;
 547         unsigned long flags;
 548         int ret;
 549
 550         spin_lock_irqsave(&pipe->irqlock, flags);
 551         if (pipe->state == VSP1_PIPELINE_RUNNING)
 552                 pipe->state = VSP1_PIPELINE_STOPPING;
 553         spin_unlock_irqrestore(&pipe->irqlock, flags);
 554
 555         ret = wait_event_timeout(pipe->wq, vsp1_pipeline_stopped(pipe),
 556                                  msecs_to_jiffies(500));
 557         ret = ret == 0 ? -ETIMEDOUT : 0;
 558
 559         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 560                 if (entity->route && entity->route->reg)
 561                         vsp1_write(entity->vsp1, entity->route->reg,
 562                                    VI6_DPR_NODE_UNUSED);
 563
 564                 v4l2_subdev_call(&entity->subdev, video, s_stream, 0);
 565         }
 566
 567         return ret;
 568 }
 569
 570 static bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe)
 571 {
 572         unsigned int mask;
 573
 574         mask = ((1 << pipe->num_inputs) - 1) << 1;
 575         if (!pipe->lif)
 576                 mask |= 1 << 0;
 577
 578         return pipe->buffers_ready == mask;
 579 }
 580
 581 /*
 582  * vsp1_video_complete_buffer - Complete the current buffer
 583  * @video: the video node
 584  *
 585  * This function completes the current buffer by filling its sequence number,
 586  * time stamp and payload size, and hands it back to the videobuf core.
 587  *
 588  * When operating in DU output mode (deep pipeline to the DU through the LIF),
 589  * the VSP1 needs to constantly supply frames to the display. In that case, if
 590  * no other buffer is queued, reuse the one that has just been processed instead
 591  * of handing it back to the videobuf core.
 592  *
 593  * Return the next queued buffer or NULL if the queue is empty.
 594  */
 595 static struct vsp1_video_buffer *
 596 vsp1_video_complete_buffer(struct vsp1_video *video)
 597 {
 598         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 599         struct vsp1_video_buffer *next = NULL;
 600         struct vsp1_video_buffer *done;
 601         unsigned long flags;
 602         unsigned int i;
 603
 604         spin_lock_irqsave(&video->irqlock, flags);
 605
 606         if (list_empty(&video->irqqueue)) {
 607                 spin_unlock_irqrestore(&video->irqlock, flags);
 608                 return NULL;
 609         }
 610
 611         done = list_first_entry(&video->irqqueue,
 612                                 struct vsp1_video_buffer, queue);
 613
 614         /* In DU output mode reuse the buffer if the list is singular. */
 615         if (pipe->lif && list_is_singular(&video->irqqueue)) {
 616                 spin_unlock_irqrestore(&video->irqlock, flags);
 617                 return done;
 618         }
 619
 620         list_del(&done->queue);
 621
 622         if (!list_empty(&video->irqqueue))
 623                 next = list_first_entry(&video->irqqueue,
 624                                         struct vsp1_video_buffer, queue);
 625
 626         spin_unlock_irqrestore(&video->irqlock, flags);
 627
 628         done->buf.sequence = video->sequence++;
 629         done->buf.vb2_buf.timestamp = ktime_get_ns();
 630         for (i = 0; i < done->buf.vb2_buf.num_planes; ++i)
 631                 vb2_set_plane_payload(&done->buf.vb2_buf, i, done->length[i]);
 632         vb2_buffer_done(&done->buf.vb2_buf, VB2_BUF_STATE_DONE);
 633
 634         return next;
 635 }
 636
 637 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
 638                                  struct vsp1_video *video)
 639 {
 640         struct vsp1_video_buffer *buf;
 641         unsigned long flags;
 642
 643         buf = vsp1_video_complete_buffer(video);
 644         if (buf == NULL)
 645                 return;
 646
 647         spin_lock_irqsave(&pipe->irqlock, flags);
 648
 649         video->rwpf->ops->queue(video->rwpf, buf);
 650         pipe->buffers_ready |= 1 << video->pipe_index;
 651
 652         spin_unlock_irqrestore(&pipe->irqlock, flags);
 653 }
 654
 655 void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
 656 {
 657         enum vsp1_pipeline_state state;
 658         unsigned long flags;
 659         unsigned int i;
 660
 661         if (pipe == NULL)
 662                 return;
 663
 664         /* Complete buffers on all video nodes. */
 665         for (i = 0; i < pipe->num_inputs; ++i)
 666                 vsp1_video_frame_end(pipe, &pipe->inputs[i]->video);
 667
 668         if (!pipe->lif)
 669                 vsp1_video_frame_end(pipe, &pipe->output->video);
 670
 671         spin_lock_irqsave(&pipe->irqlock, flags);
 672
 673         state = pipe->state;
 674         pipe->state = VSP1_PIPELINE_STOPPED;
 675
 676         /* If a stop has been requested, mark the pipeline as stopped and
 677          * return.
 678          */
 679         if (state == VSP1_PIPELINE_STOPPING) {
 680                 wake_up(&pipe->wq);
 681                 goto done;
 682         }
 683
 684         /* Restart the pipeline if ready. */
 685         if (vsp1_pipeline_ready(pipe))
 686                 vsp1_pipeline_run(pipe);
 687
 688 done:
 689         spin_unlock_irqrestore(&pipe->irqlock, flags);
 690 }
 691
 692 /*
 693  * Propagate the alpha value through the pipeline.
 694  *
 695  * As the UDS has restricted scaling capabilities when the alpha component needs
 696  * to be scaled, we disable alpha scaling when the UDS input has a fixed alpha
 697  * value. The UDS then outputs a fixed alpha value which needs to be programmed
 698  * from the input RPF alpha.
 699  */
 700 void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe,
 701                                    struct vsp1_entity *input,
 702                                    unsigned int alpha)
 703 {
 704         struct vsp1_entity *entity;
 705         struct media_pad *pad;
 706
 707         pad = media_entity_remote_pad(&input->pads[RWPF_PAD_SOURCE]);
 708
 709         while (pad) {
 710                 if (!is_media_entity_v4l2_subdev(pad->entity))
 711                         break;
 712
 713                 entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
 714
 715                 /* The BRU background color has a fixed alpha value set to 255,
 716                  * the output alpha value is thus always equal to 255.
 717                  */
 718                 if (entity->type == VSP1_ENTITY_BRU)
 719                         alpha = 255;
 720
 721                 if (entity->type == VSP1_ENTITY_UDS) {
 722                         struct vsp1_uds *uds = to_uds(&entity->subdev);
 723
 724                         vsp1_uds_set_alpha(uds, alpha);
 725                         break;
 726                 }
 727
 728                 pad = &entity->pads[entity->source_pad];
 729                 pad = media_entity_remote_pad(pad);
 730         }
 731 }
 732
 733 void vsp1_pipelines_suspend(struct vsp1_device *vsp1)
 734 {
 735         unsigned long flags;
 736         unsigned int i;
 737         int ret;
 738
 739         /* To avoid increasing the system suspend time needlessly, loop over the
 740          * pipelines twice, first to set them all to the stopping state, and then
 741          * to wait for the stop to complete.
 742          */
 743         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
 744                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 745                 struct vsp1_pipeline *pipe;
 746
 747                 if (wpf == NULL)
 748                         continue;
 749
 750                 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
 751                 if (pipe == NULL)
 752                         continue;
 753
 754                 spin_lock_irqsave(&pipe->irqlock, flags);
 755                 if (pipe->state == VSP1_PIPELINE_RUNNING)
 756                         pipe->state = VSP1_PIPELINE_STOPPING;
 757                 spin_unlock_irqrestore(&pipe->irqlock, flags);
 758         }
 759
 760         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
 761                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 762                 struct vsp1_pipeline *pipe;
 763
 764                 if (wpf == NULL)
 765                         continue;
 766
 767                 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
 768                 if (pipe == NULL)
 769                         continue;
 770
 771                 ret = wait_event_timeout(pipe->wq, vsp1_pipeline_stopped(pipe),
 772                                          msecs_to_jiffies(500));
 773                 if (ret == 0)
 774                         dev_warn(vsp1->dev, "pipeline %u stop timeout\n",
 775                                  wpf->entity.index);
 776         }
 777 }
 778
 779 void vsp1_pipelines_resume(struct vsp1_device *vsp1)
 780 {
 781         unsigned int i;
 782
 783         /* Resume pipeline all running pipelines. */
 784         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
 785                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 786                 struct vsp1_pipeline *pipe;
 787
 788                 if (wpf == NULL)
 789                         continue;
 790
 791                 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
 792                 if (pipe == NULL)
 793                         continue;
 794
 795                 if (vsp1_pipeline_ready(pipe))
 796                         vsp1_pipeline_run(pipe);
 797         }
 798 }
 799
 800 /* -----------------------------------------------------------------------------
 801  * videobuf2 Queue Operations
 802  */
 803
 804 static int
 805 vsp1_video_queue_setup(struct vb2_queue *vq,
 806                      unsigned int *nbuffers, unsigned int *nplanes,
 807                      unsigned int sizes[], void *alloc_ctxs[])
 808 {
 809         struct vsp1_video *video = vb2_get_drv_priv(vq);
 810         const struct v4l2_pix_format_mplane *format = &video->rwpf->format;
 811         unsigned int i;
 812
 813         if (*nplanes) {
 814                 if (*nplanes != format->num_planes)
 815                         return -EINVAL;
 816
 817                 for (i = 0; i < *nplanes; i++) {
 818                         if (sizes[i] < format->plane_fmt[i].sizeimage)
 819                                 return -EINVAL;
 820                         alloc_ctxs[i] = video->alloc_ctx;
 821                 }
 822                 return 0;
 823         }
 824
 825         *nplanes = format->num_planes;
 826
 827         for (i = 0; i < format->num_planes; ++i) {
 828                 sizes[i] = format->plane_fmt[i].sizeimage;
 829                 alloc_ctxs[i] = video->alloc_ctx;
 830         }
 831
 832         return 0;
 833 }
 834
 835 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
 836 {
 837         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 838         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 839         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vbuf);
 840         const struct v4l2_pix_format_mplane *format = &video->rwpf->format;
 841         unsigned int i;
 842
 843         if (vb->num_planes < format->num_planes)
 844                 return -EINVAL;
 845
 846         for (i = 0; i < vb->num_planes; ++i) {
 847                 buf->addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 848                 buf->length[i] = vb2_plane_size(vb, i);
 849
 850                 if (buf->length[i] < format->plane_fmt[i].sizeimage)
 851                         return -EINVAL;
 852         }
 853
 854         return 0;
 855 }
 856
 857 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
 858 {
 859         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 860         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 861         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 862         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vbuf);
 863         unsigned long flags;
 864         bool empty;
 865
 866         spin_lock_irqsave(&video->irqlock, flags);
 867         empty = list_empty(&video->irqqueue);
 868         list_add_tail(&buf->queue, &video->irqqueue);
 869         spin_unlock_irqrestore(&video->irqlock, flags);
 870
 871         if (!empty)
 872                 return;
 873
 874         spin_lock_irqsave(&pipe->irqlock, flags);
 875
 876         video->rwpf->ops->queue(video->rwpf, buf);
 877         pipe->buffers_ready |= 1 << video->pipe_index;
 878
 879         if (vb2_is_streaming(&video->queue) &&
 880             vsp1_pipeline_ready(pipe))
 881                 vsp1_pipeline_run(pipe);
 882
 883         spin_unlock_irqrestore(&pipe->irqlock, flags);
 884 }
 885
 886 static void vsp1_entity_route_setup(struct vsp1_entity *source)
 887 {
 888         struct vsp1_entity *sink;
 889
 890         if (source->route->reg == 0)
 891                 return;
 892
 893         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
 894         vsp1_write(source->vsp1, source->route->reg,
 895                    sink->route->inputs[source->sink_pad]);
 896 }
 897
 898 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 899 {
 900         struct vsp1_video *video = vb2_get_drv_priv(vq);
 901         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 902         struct vsp1_entity *entity;
 903         unsigned long flags;
 904         int ret;
 905
 906         mutex_lock(&pipe->lock);
 907         if (pipe->stream_count == pipe->num_video - 1) {
 908                 if (pipe->uds) {
 909                         struct vsp1_uds *uds = to_uds(&pipe->uds->subdev);
 910
 911                         /* If a BRU is present in the pipeline before the UDS,
 912                          * the alpha component doesn't need to be scaled as the
 913                          * BRU output alpha value is fixed to 255. Otherwise we
 914                          * need to scale the alpha component only when available
 915                          * at the input RPF.
 916                          */
 917                         if (pipe->uds_input->type == VSP1_ENTITY_BRU) {
 918                                 uds->scale_alpha = false;
 919                         } else {
 920                                 struct vsp1_rwpf *rpf =
 921                                         to_rwpf(&pipe->uds_input->subdev);
 922
 923                                 uds->scale_alpha = rpf->fmtinfo->alpha;
 924                         }
 925                 }
 926
 927                 list_for_each_entry(entity, &pipe->entities, list_pipe) {
 928                         vsp1_entity_route_setup(entity);
 929
 930                         ret = v4l2_subdev_call(&entity->subdev, video,
 931                                                s_stream, 1);
 932                         if (ret < 0) {
 933                                 mutex_unlock(&pipe->lock);
 934                                 return ret;
 935                         }
 936                 }
 937         }
 938
 939         pipe->stream_count++;
 940         mutex_unlock(&pipe->lock);
 941
 942         spin_lock_irqsave(&pipe->irqlock, flags);
 943         if (vsp1_pipeline_ready(pipe))
 944                 vsp1_pipeline_run(pipe);
 945         spin_unlock_irqrestore(&pipe->irqlock, flags);
 946
 947         return 0;
 948 }
 949
 950 static void vsp1_video_stop_streaming(struct vb2_queue *vq)
 951 {
 952         struct vsp1_video *video = vb2_get_drv_priv(vq);
 953         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 954         struct vsp1_video_buffer *buffer;
 955         unsigned long flags;
 956         int ret;
 957
 958         mutex_lock(&pipe->lock);
 959         if (--pipe->stream_count == 0) {
 960                 /* Stop the pipeline. */
 961                 ret = vsp1_pipeline_stop(pipe);
 962                 if (ret == -ETIMEDOUT)
 963                         dev_err(video->vsp1->dev, "pipeline stop timeout\n");
 964         }
 965         mutex_unlock(&pipe->lock);
 966
 967         vsp1_pipeline_cleanup(pipe);
 968         media_entity_pipeline_stop(&video->video.entity);
 969
 970         /* Remove all buffers from the IRQ queue. */
 971         spin_lock_irqsave(&video->irqlock, flags);
 972         list_for_each_entry(buffer, &video->irqqueue, queue)
 973                 vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR);
 974         INIT_LIST_HEAD(&video->irqqueue);
 975         spin_unlock_irqrestore(&video->irqlock, flags);
 976 }
 977
 978 static struct vb2_ops vsp1_video_queue_qops = {
 979         .queue_setup = vsp1_video_queue_setup,
 980         .buf_prepare = vsp1_video_buffer_prepare,
 981         .buf_queue = vsp1_video_buffer_queue,
 982         .wait_prepare = vb2_ops_wait_prepare,
 983         .wait_finish = vb2_ops_wait_finish,
 984         .start_streaming = vsp1_video_start_streaming,
 985         .stop_streaming = vsp1_video_stop_streaming,
 986 };
 987
 988 /* -----------------------------------------------------------------------------
 989  * V4L2 ioctls
 990  */
 991
 992 static int
 993 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 994 {
 995         struct v4l2_fh *vfh = file->private_data;
 996         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 997
 998         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
 999                           | V4L2_CAP_VIDEO_CAPTURE_MPLANE
1000                           | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
1001
1002         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1003                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
1004                                  | V4L2_CAP_STREAMING;
1005         else
1006                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
1007                                  | V4L2_CAP_STREAMING;
1008
1009         strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
1010         strlcpy(cap->card, video->video.name, sizeof(cap->card));
1011         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
1012                  dev_name(video->vsp1->dev));
1013
1014         return 0;
1015 }
1016
1017 static int
1018 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
1019 {
1020         struct v4l2_fh *vfh = file->private_data;
1021         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1022
1023         if (format->type != video->queue.type)
1024                 return -EINVAL;
1025
1026         mutex_lock(&video->lock);
1027         format->fmt.pix_mp = video->rwpf->format;
1028         mutex_unlock(&video->lock);
1029
1030         return 0;
1031 }
1032
1033 static int
1034 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
1035 {
1036         struct v4l2_fh *vfh = file->private_data;
1037         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1038
1039         if (format->type != video->queue.type)
1040                 return -EINVAL;
1041
1042         return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
1043 }
1044
1045 static int
1046 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
1047 {
1048         struct v4l2_fh *vfh = file->private_data;
1049         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1050         const struct vsp1_format_info *info;
1051         int ret;
1052
1053         if (format->type != video->queue.type)
1054                 return -EINVAL;
1055
1056         ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
1057         if (ret < 0)
1058                 return ret;
1059
1060         mutex_lock(&video->lock);
1061
1062         if (vb2_is_busy(&video->queue)) {
1063                 ret = -EBUSY;
1064                 goto done;
1065         }
1066
1067         video->rwpf->format = format->fmt.pix_mp;
1068         video->rwpf->fmtinfo = info;
1069
1070 done:
1071         mutex_unlock(&video->lock);
1072         return ret;
1073 }
1074
1075 static int
1076 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1077 {
1078         struct v4l2_fh *vfh = file->private_data;
1079         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1080         struct vsp1_pipeline *pipe;
1081         int ret;
1082
1083         if (video->queue.owner && video->queue.owner != file->private_data)
1084                 return -EBUSY;
1085
1086         video->sequence = 0;
1087
1088         /* Start streaming on the pipeline. No link touching an entity in the
1089          * pipeline can be activated or deactivated once streaming is started.
1090          *
1091          * Use the VSP1 pipeline object embedded in the first video object that
1092          * starts streaming.
1093          */
1094         pipe = video->video.entity.pipe
1095              ? to_vsp1_pipeline(&video->video.entity) : &video->pipe;
1096
1097         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
1098         if (ret < 0)
1099                 return ret;
1100
1101         /* Verify that the configured format matches the output of the connected
1102          * subdev.
1103          */
1104         ret = vsp1_video_verify_format(video);
1105         if (ret < 0)
1106                 goto err_stop;
1107
1108         ret = vsp1_pipeline_init(pipe, video);
1109         if (ret < 0)
1110                 goto err_stop;
1111
1112         /* Start the queue. */
1113         ret = vb2_streamon(&video->queue, type);
1114         if (ret < 0)
1115                 goto err_cleanup;
1116
1117         return 0;
1118
1119 err_cleanup:
1120         vsp1_pipeline_cleanup(pipe);
1121 err_stop:
1122         media_entity_pipeline_stop(&video->video.entity);
1123         return ret;
1124 }
1125
1126 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
1127         .vidioc_querycap                = vsp1_video_querycap,
1128         .vidioc_g_fmt_vid_cap_mplane    = vsp1_video_get_format,
1129         .vidioc_s_fmt_vid_cap_mplane    = vsp1_video_set_format,
1130         .vidioc_try_fmt_vid_cap_mplane  = vsp1_video_try_format,
1131         .vidioc_g_fmt_vid_out_mplane    = vsp1_video_get_format,
1132         .vidioc_s_fmt_vid_out_mplane    = vsp1_video_set_format,
1133         .vidioc_try_fmt_vid_out_mplane  = vsp1_video_try_format,
1134         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1135         .vidioc_querybuf                = vb2_ioctl_querybuf,
1136         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1137         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1138         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1139         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
1140         .vidioc_streamon                = vsp1_video_streamon,
1141         .vidioc_streamoff               = vb2_ioctl_streamoff,
1142 };
1143
1144 /* -----------------------------------------------------------------------------
1145  * V4L2 File Operations
1146  */
1147
1148 static int vsp1_video_open(struct file *file)
1149 {
1150         struct vsp1_video *video = video_drvdata(file);
1151         struct v4l2_fh *vfh;
1152         int ret = 0;
1153
1154         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
1155         if (vfh == NULL)
1156                 return -ENOMEM;
1157
1158         v4l2_fh_init(vfh, &video->video);
1159         v4l2_fh_add(vfh);
1160
1161         file->private_data = vfh;
1162
1163         ret = vsp1_device_get(video->vsp1);
1164         if (ret < 0) {
1165                 v4l2_fh_del(vfh);
1166                 kfree(vfh);
1167         }
1168
1169         return ret;
1170 }
1171
1172 static int vsp1_video_release(struct file *file)
1173 {
1174         struct vsp1_video *video = video_drvdata(file);
1175         struct v4l2_fh *vfh = file->private_data;
1176
1177         mutex_lock(&video->lock);
1178         if (video->queue.owner == vfh) {
1179                 vb2_queue_release(&video->queue);
1180                 video->queue.owner = NULL;
1181         }
1182         mutex_unlock(&video->lock);
1183
1184         vsp1_device_put(video->vsp1);
1185
1186         v4l2_fh_release(file);
1187
1188         file->private_data = NULL;
1189
1190         return 0;
1191 }
1192
1193 static struct v4l2_file_operations vsp1_video_fops = {
1194         .owner = THIS_MODULE,
1195         .unlocked_ioctl = video_ioctl2,
1196         .open = vsp1_video_open,
1197         .release = vsp1_video_release,
1198         .poll = vb2_fop_poll,
1199         .mmap = vb2_fop_mmap,
1200 };
1201
1202 /* -----------------------------------------------------------------------------
1203  * Initialization and Cleanup
1204  */
1205
1206 int vsp1_video_init(struct vsp1_video *video, struct vsp1_rwpf *rwpf)
1207 {
1208         const char *direction;
1209         int ret;
1210
1211         switch (video->type) {
1212         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1213                 direction = "output";
1214                 video->pad.flags = MEDIA_PAD_FL_SINK;
1215                 break;
1216
1217         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1218                 direction = "input";
1219                 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1220                 video->video.vfl_dir = VFL_DIR_TX;
1221                 break;
1222
1223         default:
1224                 return -EINVAL;
1225         }
1226
1227         video->rwpf = rwpf;
1228
1229         mutex_init(&video->lock);
1230         spin_lock_init(&video->irqlock);
1231         INIT_LIST_HEAD(&video->irqqueue);
1232
1233         mutex_init(&video->pipe.lock);
1234         spin_lock_init(&video->pipe.irqlock);
1235         INIT_LIST_HEAD(&video->pipe.entities);
1236         init_waitqueue_head(&video->pipe.wq);
1237         video->pipe.state = VSP1_PIPELINE_STOPPED;
1238
1239         /* Initialize the media entity... */
1240         ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
1241         if (ret < 0)
1242                 return ret;
1243
1244         /* ... and the format ... */
1245         rwpf->fmtinfo = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
1246         rwpf->format.pixelformat = rwpf->fmtinfo->fourcc;
1247         rwpf->format.colorspace = V4L2_COLORSPACE_SRGB;
1248         rwpf->format.field = V4L2_FIELD_NONE;
1249         rwpf->format.width = VSP1_VIDEO_DEF_WIDTH;
1250         rwpf->format.height = VSP1_VIDEO_DEF_HEIGHT;
1251         rwpf->format.num_planes = 1;
1252         rwpf->format.plane_fmt[0].bytesperline =
1253                 rwpf->format.width * rwpf->fmtinfo->bpp[0] / 8;
1254         rwpf->format.plane_fmt[0].sizeimage =
1255                 rwpf->format.plane_fmt[0].bytesperline * rwpf->format.height;
1256
1257         /* ... and the video node... */
1258         video->video.v4l2_dev = &video->vsp1->v4l2_dev;
1259         video->video.fops = &vsp1_video_fops;
1260         snprintf(video->video.name, sizeof(video->video.name), "%s %s",
1261                  rwpf->entity.subdev.name, direction);
1262         video->video.vfl_type = VFL_TYPE_GRABBER;
1263         video->video.release = video_device_release_empty;
1264         video->video.ioctl_ops = &vsp1_video_ioctl_ops;
1265
1266         video_set_drvdata(&video->video, video);
1267
1268         /* ... and the buffers queue... */
1269         video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
1270         if (IS_ERR(video->alloc_ctx)) {
1271                 ret = PTR_ERR(video->alloc_ctx);
1272                 goto error;
1273         }
1274
1275         video->queue.type = video->type;
1276         video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1277         video->queue.lock = &video->lock;
1278         video->queue.drv_priv = video;
1279         video->queue.buf_struct_size = sizeof(struct vsp1_video_buffer);
1280         video->queue.ops = &vsp1_video_queue_qops;
1281         video->queue.mem_ops = &vb2_dma_contig_memops;
1282         video->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1283         ret = vb2_queue_init(&video->queue);
1284         if (ret < 0) {
1285                 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
1286                 goto error;
1287         }
1288
1289         /* ... and register the video device. */
1290         video->video.queue = &video->queue;
1291         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1292         if (ret < 0) {
1293                 dev_err(video->vsp1->dev, "failed to register video device\n");
1294                 goto error;
1295         }
1296
1297         return 0;
1298
1299 error:
1300         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1301         vsp1_video_cleanup(video);
1302         return ret;
1303 }
1304
1305 void vsp1_video_cleanup(struct vsp1_video *video)
1306 {
1307         if (video_is_registered(&video->video))
1308                 video_unregister_device(&video->video);
1309
1310         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1311         media_entity_cleanup(&video->video.entity);
1312 }