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 };
 134
 135 /*
 136  * vsp1_get_format_info - Retrieve format information for a 4CC
 137  * @fourcc: the format 4CC
 138  *
 139  * Return a pointer to the format information structure corresponding to the
 140  * given V4L2 format 4CC, or NULL if no corresponding format can be found.
 141  */
 142 static const struct vsp1_format_info *vsp1_get_format_info(u32 fourcc)
 143 {
 144         unsigned int i;
 145
 146         for (i = 0; i < ARRAY_SIZE(vsp1_video_formats); ++i) {
 147                 const struct vsp1_format_info *info = &vsp1_video_formats[i];
 148
 149                 if (info->fourcc == fourcc)
 150                         return info;
 151         }
 152
 153         return NULL;
 154 }
 155
 156
 157 static struct v4l2_subdev *
 158 vsp1_video_remote_subdev(struct media_pad *local, u32 *pad)
 159 {
 160         struct media_pad *remote;
 161
 162         remote = media_entity_remote_pad(local);
 163         if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
 164                 return NULL;
 165
 166         if (pad)
 167                 *pad = remote->index;
 168
 169         return media_entity_to_v4l2_subdev(remote->entity);
 170 }
 171
 172 static int vsp1_video_verify_format(struct vsp1_video *video)
 173 {
 174         struct v4l2_subdev_format fmt;
 175         struct v4l2_subdev *subdev;
 176         int ret;
 177
 178         subdev = vsp1_video_remote_subdev(&video->pad, &fmt.pad);
 179         if (subdev == NULL)
 180                 return -EINVAL;
 181
 182         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 183         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 184         if (ret < 0)
 185                 return ret == -ENOIOCTLCMD ? -EINVAL : ret;
 186
 187         if (video->fmtinfo->mbus != fmt.format.code ||
 188             video->format.height != fmt.format.height ||
 189             video->format.width != fmt.format.width)
 190                 return -EINVAL;
 191
 192         return 0;
 193 }
 194
 195 static int __vsp1_video_try_format(struct vsp1_video *video,
 196                                    struct v4l2_pix_format_mplane *pix,
 197                                    const struct vsp1_format_info **fmtinfo)
 198 {
 199         static const u32 xrgb_formats[][2] = {
 200                 { V4L2_PIX_FMT_RGB444, V4L2_PIX_FMT_XRGB444 },
 201                 { V4L2_PIX_FMT_RGB555, V4L2_PIX_FMT_XRGB555 },
 202                 { V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_XBGR32 },
 203                 { V4L2_PIX_FMT_RGB32, V4L2_PIX_FMT_XRGB32 },
 204         };
 205
 206         const struct vsp1_format_info *info;
 207         unsigned int width = pix->width;
 208         unsigned int height = pix->height;
 209         unsigned int i;
 210
 211         /* Backward compatibility: replace deprecated RGB formats by their XRGB
 212          * equivalent. This selects the format older userspace applications want
 213          * while still exposing the new format.
 214          */
 215         for (i = 0; i < ARRAY_SIZE(xrgb_formats); ++i) {
 216                 if (xrgb_formats[i][0] == pix->pixelformat) {
 217                         pix->pixelformat = xrgb_formats[i][1];
 218                         break;
 219                 }
 220         }
 221
 222         /* Retrieve format information and select the default format if the
 223          * requested format isn't supported.
 224          */
 225         info = vsp1_get_format_info(pix->pixelformat);
 226         if (info == NULL)
 227                 info = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
 228
 229         pix->pixelformat = info->fourcc;
 230         pix->colorspace = V4L2_COLORSPACE_SRGB;
 231         pix->field = V4L2_FIELD_NONE;
 232         memset(pix->reserved, 0, sizeof(pix->reserved));
 233
 234         /* Align the width and height for YUV 4:2:2 and 4:2:0 formats. */
 235         width = round_down(width, info->hsub);
 236         height = round_down(height, info->vsub);
 237
 238         /* Clamp the width and height. */
 239         pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH);
 240         pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT,
 241                             VSP1_VIDEO_MAX_HEIGHT);
 242
 243         /* Compute and clamp the stride and image size. While not documented in
 244          * the datasheet, strides not aligned to a multiple of 128 bytes result
 245          * in image corruption.
 246          */
 247         for (i = 0; i < min(info->planes, 2U); ++i) {
 248                 unsigned int hsub = i > 0 ? info->hsub : 1;
 249                 unsigned int vsub = i > 0 ? info->vsub : 1;
 250                 unsigned int align = 128;
 251                 unsigned int bpl;
 252
 253                 bpl = clamp_t(unsigned int, pix->plane_fmt[i].bytesperline,
 254                               pix->width / hsub * info->bpp[i] / 8,
 255                               round_down(65535U, align));
 256
 257                 pix->plane_fmt[i].bytesperline = round_up(bpl, align);
 258                 pix->plane_fmt[i].sizeimage = pix->plane_fmt[i].bytesperline
 259                                             * pix->height / vsub;
 260         }
 261
 262         if (info->planes == 3) {
 263                 /* The second and third planes must have the same stride. */
 264                 pix->plane_fmt[2].bytesperline = pix->plane_fmt[1].bytesperline;
 265                 pix->plane_fmt[2].sizeimage = pix->plane_fmt[1].sizeimage;
 266         }
 267
 268         pix->num_planes = info->planes;
 269
 270         if (fmtinfo)
 271                 *fmtinfo = info;
 272
 273         return 0;
 274 }
 275
 276 /* -----------------------------------------------------------------------------
 277  * Pipeline Management
 278  */
 279
 280 static int vsp1_pipeline_validate_branch(struct vsp1_pipeline *pipe,
 281                                          struct vsp1_rwpf *input,
 282                                          struct vsp1_rwpf *output)
 283 {
 284         struct vsp1_entity *entity;
 285         struct media_entity_enum ent_enum;
 286         struct media_pad *pad;
 287         int rval;
 288         bool bru_found = false;
 289
 290         input->location.left = 0;
 291         input->location.top = 0;
 292
 293         rval = media_entity_enum_init(
 294                 &ent_enum, input->entity.pads[RWPF_PAD_SOURCE].graph_obj.mdev);
 295         if (rval)
 296                 return rval;
 297
 298         pad = media_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
 299
 300         while (1) {
 301                 if (pad == NULL) {
 302                         rval = -EPIPE;
 303                         goto out;
 304                 }
 305
 306                 /* We've reached a video node, that shouldn't have happened. */
 307                 if (!is_media_entity_v4l2_subdev(pad->entity)) {
 308                         rval = -EPIPE;
 309                         goto out;
 310                 }
 311
 312                 entity = to_vsp1_entity(
 313                         media_entity_to_v4l2_subdev(pad->entity));
 314
 315                 /* A BRU is present in the pipeline, store the compose rectangle
 316                  * location in the input RPF for use when configuring the RPF.
 317                  */
 318                 if (entity->type == VSP1_ENTITY_BRU) {
 319                         struct vsp1_bru *bru = to_bru(&entity->subdev);
 320                         struct v4l2_rect *rect =
 321                                 &bru->inputs[pad->index].compose;
 322
 323                         bru->inputs[pad->index].rpf = input;
 324
 325                         input->location.left = rect->left;
 326                         input->location.top = rect->top;
 327
 328                         bru_found = true;
 329                 }
 330
 331                 /* We've reached the WPF, we're done. */
 332                 if (entity->type == VSP1_ENTITY_WPF)
 333                         break;
 334
 335                 /* Ensure the branch has no loop. */
 336                 if (media_entity_enum_test_and_set(&ent_enum,
 337                                                    &entity->subdev.entity)) {
 338                         rval = -EPIPE;
 339                         goto out;
 340                 }
 341
 342                 /* UDS can't be chained. */
 343                 if (entity->type == VSP1_ENTITY_UDS) {
 344                         if (pipe->uds) {
 345                                 rval = -EPIPE;
 346                                 goto out;
 347                         }
 348
 349                         pipe->uds = entity;
 350                         pipe->uds_input = bru_found ? pipe->bru
 351                                         : &input->entity;
 352                 }
 353
 354                 /* Follow the source link. The link setup operations ensure
 355                  * that the output fan-out can't be more than one, there is thus
 356                  * no need to verify here that only a single source link is
 357                  * activated.
 358                  */
 359                 pad = &entity->pads[entity->source_pad];
 360                 pad = media_entity_remote_pad(pad);
 361         }
 362
 363         /* The last entity must be the output WPF. */
 364         if (entity != &output->entity)
 365                 rval = -EPIPE;
 366
 367 out:
 368         media_entity_enum_cleanup(&ent_enum);
 369
 370         return rval;
 371 }
 372
 373 static void __vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
 374 {
 375         if (pipe->bru) {
 376                 struct vsp1_bru *bru = to_bru(&pipe->bru->subdev);
 377                 unsigned int i;
 378
 379                 for (i = 0; i < ARRAY_SIZE(bru->inputs); ++i)
 380                         bru->inputs[i].rpf = NULL;
 381         }
 382
 383         INIT_LIST_HEAD(&pipe->entities);
 384         pipe->state = VSP1_PIPELINE_STOPPED;
 385         pipe->buffers_ready = 0;
 386         pipe->num_video = 0;
 387         pipe->num_inputs = 0;
 388         pipe->output = NULL;
 389         pipe->bru = NULL;
 390         pipe->lif = NULL;
 391         pipe->uds = NULL;
 392 }
 393
 394 static int vsp1_pipeline_validate(struct vsp1_pipeline *pipe,
 395                                   struct vsp1_video *video)
 396 {
 397         struct media_entity_graph graph;
 398         struct media_entity *entity = &video->video.entity;
 399         struct media_device *mdev = entity->graph_obj.mdev;
 400         unsigned int i;
 401         int ret;
 402
 403         mutex_lock(&mdev->graph_mutex);
 404
 405         /* Walk the graph to locate the entities and video nodes. */
 406         ret = media_entity_graph_walk_init(&graph, mdev);
 407         if (ret) {
 408                 mutex_unlock(&mdev->graph_mutex);
 409                 return ret;
 410         }
 411
 412         media_entity_graph_walk_start(&graph, entity);
 413
 414         while ((entity = media_entity_graph_walk_next(&graph))) {
 415                 struct v4l2_subdev *subdev;
 416                 struct vsp1_rwpf *rwpf;
 417                 struct vsp1_entity *e;
 418
 419                 if (is_media_entity_v4l2_io(entity)) {
 420                         pipe->num_video++;
 421                         continue;
 422                 }
 423
 424                 subdev = media_entity_to_v4l2_subdev(entity);
 425                 e = to_vsp1_entity(subdev);
 426                 list_add_tail(&e->list_pipe, &pipe->entities);
 427
 428                 if (e->type == VSP1_ENTITY_RPF) {
 429                         rwpf = to_rwpf(subdev);
 430                         pipe->inputs[pipe->num_inputs++] = rwpf;
 431                         rwpf->video.pipe_index = pipe->num_inputs;
 432                 } else if (e->type == VSP1_ENTITY_WPF) {
 433                         rwpf = to_rwpf(subdev);
 434                         pipe->output = to_rwpf(subdev);
 435                         rwpf->video.pipe_index = 0;
 436                 } else if (e->type == VSP1_ENTITY_LIF) {
 437                         pipe->lif = e;
 438                 } else if (e->type == VSP1_ENTITY_BRU) {
 439                         pipe->bru = e;
 440                 }
 441         }
 442
 443         mutex_unlock(&mdev->graph_mutex);
 444
 445         media_entity_graph_walk_cleanup(&graph);
 446
 447         /* We need one output and at least one input. */
 448         if (pipe->num_inputs == 0 || !pipe->output) {
 449                 ret = -EPIPE;
 450                 goto error;
 451         }
 452
 453         /* Follow links downstream for each input and make sure the graph
 454          * contains no loop and that all branches end at the output WPF.
 455          */
 456         for (i = 0; i < pipe->num_inputs; ++i) {
 457                 ret = vsp1_pipeline_validate_branch(pipe, pipe->inputs[i],
 458                                                     pipe->output);
 459                 if (ret < 0)
 460                         goto error;
 461         }
 462
 463         return 0;
 464
 465 error:
 466         __vsp1_pipeline_cleanup(pipe);
 467         return ret;
 468 }
 469
 470 static int vsp1_pipeline_init(struct vsp1_pipeline *pipe,
 471                               struct vsp1_video *video)
 472 {
 473         int ret;
 474
 475         mutex_lock(&pipe->lock);
 476
 477         /* If we're the first user validate and initialize the pipeline. */
 478         if (pipe->use_count == 0) {
 479                 ret = vsp1_pipeline_validate(pipe, video);
 480                 if (ret < 0)
 481                         goto done;
 482         }
 483
 484         pipe->use_count++;
 485         ret = 0;
 486
 487 done:
 488         mutex_unlock(&pipe->lock);
 489         return ret;
 490 }
 491
 492 static void vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
 493 {
 494         mutex_lock(&pipe->lock);
 495
 496         /* If we're the last user clean up the pipeline. */
 497         if (--pipe->use_count == 0)
 498                 __vsp1_pipeline_cleanup(pipe);
 499
 500         mutex_unlock(&pipe->lock);
 501 }
 502
 503 static void vsp1_pipeline_run(struct vsp1_pipeline *pipe)
 504 {
 505         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 506
 507         vsp1_write(vsp1, VI6_CMD(pipe->output->entity.index), VI6_CMD_STRCMD);
 508         pipe->state = VSP1_PIPELINE_RUNNING;
 509         pipe->buffers_ready = 0;
 510 }
 511
 512 static bool vsp1_pipeline_stopped(struct vsp1_pipeline *pipe)
 513 {
 514         unsigned long flags;
 515         bool stopped;
 516
 517         spin_lock_irqsave(&pipe->irqlock, flags);
 518         stopped = pipe->state == VSP1_PIPELINE_STOPPED;
 519         spin_unlock_irqrestore(&pipe->irqlock, flags);
 520
 521         return stopped;
 522 }
 523
 524 static int vsp1_pipeline_stop(struct vsp1_pipeline *pipe)
 525 {
 526         struct vsp1_entity *entity;
 527         unsigned long flags;
 528         int ret;
 529
 530         spin_lock_irqsave(&pipe->irqlock, flags);
 531         if (pipe->state == VSP1_PIPELINE_RUNNING)
 532                 pipe->state = VSP1_PIPELINE_STOPPING;
 533         spin_unlock_irqrestore(&pipe->irqlock, flags);
 534
 535         ret = wait_event_timeout(pipe->wq, vsp1_pipeline_stopped(pipe),
 536                                  msecs_to_jiffies(500));
 537         ret = ret == 0 ? -ETIMEDOUT : 0;
 538
 539         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 540                 if (entity->route && entity->route->reg)
 541                         vsp1_write(entity->vsp1, entity->route->reg,
 542                                    VI6_DPR_NODE_UNUSED);
 543
 544                 v4l2_subdev_call(&entity->subdev, video, s_stream, 0);
 545         }
 546
 547         return ret;
 548 }
 549
 550 static bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe)
 551 {
 552         unsigned int mask;
 553
 554         mask = ((1 << pipe->num_inputs) - 1) << 1;
 555         if (!pipe->lif)
 556                 mask |= 1 << 0;
 557
 558         return pipe->buffers_ready == mask;
 559 }
 560
 561 /*
 562  * vsp1_video_complete_buffer - Complete the current buffer
 563  * @video: the video node
 564  *
 565  * This function completes the current buffer by filling its sequence number,
 566  * time stamp and payload size, and hands it back to the videobuf core.
 567  *
 568  * When operating in DU output mode (deep pipeline to the DU through the LIF),
 569  * the VSP1 needs to constantly supply frames to the display. In that case, if
 570  * no other buffer is queued, reuse the one that has just been processed instead
 571  * of handing it back to the videobuf core.
 572  *
 573  * Return the next queued buffer or NULL if the queue is empty.
 574  */
 575 static struct vsp1_video_buffer *
 576 vsp1_video_complete_buffer(struct vsp1_video *video)
 577 {
 578         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 579         struct vsp1_video_buffer *next = NULL;
 580         struct vsp1_video_buffer *done;
 581         unsigned long flags;
 582         unsigned int i;
 583
 584         spin_lock_irqsave(&video->irqlock, flags);
 585
 586         if (list_empty(&video->irqqueue)) {
 587                 spin_unlock_irqrestore(&video->irqlock, flags);
 588                 return NULL;
 589         }
 590
 591         done = list_first_entry(&video->irqqueue,
 592                                 struct vsp1_video_buffer, queue);
 593
 594         /* In DU output mode reuse the buffer if the list is singular. */
 595         if (pipe->lif && list_is_singular(&video->irqqueue)) {
 596                 spin_unlock_irqrestore(&video->irqlock, flags);
 597                 return done;
 598         }
 599
 600         list_del(&done->queue);
 601
 602         if (!list_empty(&video->irqqueue))
 603                 next = list_first_entry(&video->irqqueue,
 604                                         struct vsp1_video_buffer, queue);
 605
 606         spin_unlock_irqrestore(&video->irqlock, flags);
 607
 608         done->buf.sequence = video->sequence++;
 609         done->buf.vb2_buf.timestamp = ktime_get_ns();
 610         for (i = 0; i < done->buf.vb2_buf.num_planes; ++i)
 611                 vb2_set_plane_payload(&done->buf.vb2_buf, i, done->length[i]);
 612         vb2_buffer_done(&done->buf.vb2_buf, VB2_BUF_STATE_DONE);
 613
 614         return next;
 615 }
 616
 617 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
 618                                  struct vsp1_video *video)
 619 {
 620         struct vsp1_video_buffer *buf;
 621         unsigned long flags;
 622
 623         buf = vsp1_video_complete_buffer(video);
 624         if (buf == NULL)
 625                 return;
 626
 627         spin_lock_irqsave(&pipe->irqlock, flags);
 628
 629         video->ops->queue(video, buf);
 630         pipe->buffers_ready |= 1 << video->pipe_index;
 631
 632         spin_unlock_irqrestore(&pipe->irqlock, flags);
 633 }
 634
 635 void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
 636 {
 637         enum vsp1_pipeline_state state;
 638         unsigned long flags;
 639         unsigned int i;
 640
 641         if (pipe == NULL)
 642                 return;
 643
 644         /* Complete buffers on all video nodes. */
 645         for (i = 0; i < pipe->num_inputs; ++i)
 646                 vsp1_video_frame_end(pipe, &pipe->inputs[i]->video);
 647
 648         if (!pipe->lif)
 649                 vsp1_video_frame_end(pipe, &pipe->output->video);
 650
 651         spin_lock_irqsave(&pipe->irqlock, flags);
 652
 653         state = pipe->state;
 654         pipe->state = VSP1_PIPELINE_STOPPED;
 655
 656         /* If a stop has been requested, mark the pipeline as stopped and
 657          * return.
 658          */
 659         if (state == VSP1_PIPELINE_STOPPING) {
 660                 wake_up(&pipe->wq);
 661                 goto done;
 662         }
 663
 664         /* Restart the pipeline if ready. */
 665         if (vsp1_pipeline_ready(pipe))
 666                 vsp1_pipeline_run(pipe);
 667
 668 done:
 669         spin_unlock_irqrestore(&pipe->irqlock, flags);
 670 }
 671
 672 /*
 673  * Propagate the alpha value through the pipeline.
 674  *
 675  * As the UDS has restricted scaling capabilities when the alpha component needs
 676  * to be scaled, we disable alpha scaling when the UDS input has a fixed alpha
 677  * value. The UDS then outputs a fixed alpha value which needs to be programmed
 678  * from the input RPF alpha.
 679  */
 680 void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe,
 681                                    struct vsp1_entity *input,
 682                                    unsigned int alpha)
 683 {
 684         struct vsp1_entity *entity;
 685         struct media_pad *pad;
 686
 687         pad = media_entity_remote_pad(&input->pads[RWPF_PAD_SOURCE]);
 688
 689         while (pad) {
 690                 if (!is_media_entity_v4l2_subdev(pad->entity))
 691                         break;
 692
 693                 entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
 694
 695                 /* The BRU background color has a fixed alpha value set to 255,
 696                  * the output alpha value is thus always equal to 255.
 697                  */
 698                 if (entity->type == VSP1_ENTITY_BRU)
 699                         alpha = 255;
 700
 701                 if (entity->type == VSP1_ENTITY_UDS) {
 702                         struct vsp1_uds *uds = to_uds(&entity->subdev);
 703
 704                         vsp1_uds_set_alpha(uds, alpha);
 705                         break;
 706                 }
 707
 708                 pad = &entity->pads[entity->source_pad];
 709                 pad = media_entity_remote_pad(pad);
 710         }
 711 }
 712
 713 void vsp1_pipelines_suspend(struct vsp1_device *vsp1)
 714 {
 715         unsigned long flags;
 716         unsigned int i;
 717         int ret;
 718
 719         /* To avoid increasing the system suspend time needlessly, loop over the
 720          * pipelines twice, first to set them all to the stopping state, and then
 721          * to wait for the stop to complete.
 722          */
 723         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
 724                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 725                 struct vsp1_pipeline *pipe;
 726
 727                 if (wpf == NULL)
 728                         continue;
 729
 730                 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
 731                 if (pipe == NULL)
 732                         continue;
 733
 734                 spin_lock_irqsave(&pipe->irqlock, flags);
 735                 if (pipe->state == VSP1_PIPELINE_RUNNING)
 736                         pipe->state = VSP1_PIPELINE_STOPPING;
 737                 spin_unlock_irqrestore(&pipe->irqlock, flags);
 738         }
 739
 740         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
 741                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 742                 struct vsp1_pipeline *pipe;
 743
 744                 if (wpf == NULL)
 745                         continue;
 746
 747                 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
 748                 if (pipe == NULL)
 749                         continue;
 750
 751                 ret = wait_event_timeout(pipe->wq, vsp1_pipeline_stopped(pipe),
 752                                          msecs_to_jiffies(500));
 753                 if (ret == 0)
 754                         dev_warn(vsp1->dev, "pipeline %u stop timeout\n",
 755                                  wpf->entity.index);
 756         }
 757 }
 758
 759 void vsp1_pipelines_resume(struct vsp1_device *vsp1)
 760 {
 761         unsigned int i;
 762
 763         /* Resume pipeline all running pipelines. */
 764         for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
 765                 struct vsp1_rwpf *wpf = vsp1->wpf[i];
 766                 struct vsp1_pipeline *pipe;
 767
 768                 if (wpf == NULL)
 769                         continue;
 770
 771                 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
 772                 if (pipe == NULL)
 773                         continue;
 774
 775                 if (vsp1_pipeline_ready(pipe))
 776                         vsp1_pipeline_run(pipe);
 777         }
 778 }
 779
 780 /* -----------------------------------------------------------------------------
 781  * videobuf2 Queue Operations
 782  */
 783
 784 static int
 785 vsp1_video_queue_setup(struct vb2_queue *vq,
 786                      unsigned int *nbuffers, unsigned int *nplanes,
 787                      unsigned int sizes[], void *alloc_ctxs[])
 788 {
 789         struct vsp1_video *video = vb2_get_drv_priv(vq);
 790         const struct v4l2_pix_format_mplane *format = &video->format;
 791         unsigned int i;
 792
 793         if (*nplanes) {
 794                 if (*nplanes != format->num_planes)
 795                         return -EINVAL;
 796
 797                 for (i = 0; i < *nplanes; i++) {
 798                         if (sizes[i] < format->plane_fmt[i].sizeimage)
 799                                 return -EINVAL;
 800                         alloc_ctxs[i] = video->alloc_ctx;
 801                 }
 802                 return 0;
 803         }
 804
 805         *nplanes = format->num_planes;
 806
 807         for (i = 0; i < format->num_planes; ++i) {
 808                 sizes[i] = format->plane_fmt[i].sizeimage;
 809                 alloc_ctxs[i] = video->alloc_ctx;
 810         }
 811
 812         return 0;
 813 }
 814
 815 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
 816 {
 817         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 818         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 819         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vbuf);
 820         const struct v4l2_pix_format_mplane *format = &video->format;
 821         unsigned int i;
 822
 823         if (vb->num_planes < format->num_planes)
 824                 return -EINVAL;
 825
 826         for (i = 0; i < vb->num_planes; ++i) {
 827                 buf->addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 828                 buf->length[i] = vb2_plane_size(vb, i);
 829
 830                 if (buf->length[i] < format->plane_fmt[i].sizeimage)
 831                         return -EINVAL;
 832         }
 833
 834         return 0;
 835 }
 836
 837 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
 838 {
 839         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 840         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 841         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 842         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vbuf);
 843         unsigned long flags;
 844         bool empty;
 845
 846         spin_lock_irqsave(&video->irqlock, flags);
 847         empty = list_empty(&video->irqqueue);
 848         list_add_tail(&buf->queue, &video->irqqueue);
 849         spin_unlock_irqrestore(&video->irqlock, flags);
 850
 851         if (!empty)
 852                 return;
 853
 854         spin_lock_irqsave(&pipe->irqlock, flags);
 855
 856         video->ops->queue(video, buf);
 857         pipe->buffers_ready |= 1 << video->pipe_index;
 858
 859         if (vb2_is_streaming(&video->queue) &&
 860             vsp1_pipeline_ready(pipe))
 861                 vsp1_pipeline_run(pipe);
 862
 863         spin_unlock_irqrestore(&pipe->irqlock, flags);
 864 }
 865
 866 static void vsp1_entity_route_setup(struct vsp1_entity *source)
 867 {
 868         struct vsp1_entity *sink;
 869
 870         if (source->route->reg == 0)
 871                 return;
 872
 873         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
 874         vsp1_write(source->vsp1, source->route->reg,
 875                    sink->route->inputs[source->sink_pad]);
 876 }
 877
 878 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 879 {
 880         struct vsp1_video *video = vb2_get_drv_priv(vq);
 881         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 882         struct vsp1_entity *entity;
 883         unsigned long flags;
 884         int ret;
 885
 886         mutex_lock(&pipe->lock);
 887         if (pipe->stream_count == pipe->num_video - 1) {
 888                 if (pipe->uds) {
 889                         struct vsp1_uds *uds = to_uds(&pipe->uds->subdev);
 890
 891                         /* If a BRU is present in the pipeline before the UDS,
 892                          * the alpha component doesn't need to be scaled as the
 893                          * BRU output alpha value is fixed to 255. Otherwise we
 894                          * need to scale the alpha component only when available
 895                          * at the input RPF.
 896                          */
 897                         if (pipe->uds_input->type == VSP1_ENTITY_BRU) {
 898                                 uds->scale_alpha = false;
 899                         } else {
 900                                 struct vsp1_rwpf *rpf =
 901                                         to_rwpf(&pipe->uds_input->subdev);
 902
 903                                 uds->scale_alpha = rpf->video.fmtinfo->alpha;
 904                         }
 905                 }
 906
 907                 list_for_each_entry(entity, &pipe->entities, list_pipe) {
 908                         vsp1_entity_route_setup(entity);
 909
 910                         ret = v4l2_subdev_call(&entity->subdev, video,
 911                                                s_stream, 1);
 912                         if (ret < 0) {
 913                                 mutex_unlock(&pipe->lock);
 914                                 return ret;
 915                         }
 916                 }
 917         }
 918
 919         pipe->stream_count++;
 920         mutex_unlock(&pipe->lock);
 921
 922         spin_lock_irqsave(&pipe->irqlock, flags);
 923         if (vsp1_pipeline_ready(pipe))
 924                 vsp1_pipeline_run(pipe);
 925         spin_unlock_irqrestore(&pipe->irqlock, flags);
 926
 927         return 0;
 928 }
 929
 930 static void vsp1_video_stop_streaming(struct vb2_queue *vq)
 931 {
 932         struct vsp1_video *video = vb2_get_drv_priv(vq);
 933         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 934         struct vsp1_video_buffer *buffer;
 935         unsigned long flags;
 936         int ret;
 937
 938         mutex_lock(&pipe->lock);
 939         if (--pipe->stream_count == 0) {
 940                 /* Stop the pipeline. */
 941                 ret = vsp1_pipeline_stop(pipe);
 942                 if (ret == -ETIMEDOUT)
 943                         dev_err(video->vsp1->dev, "pipeline stop timeout\n");
 944         }
 945         mutex_unlock(&pipe->lock);
 946
 947         vsp1_pipeline_cleanup(pipe);
 948         media_entity_pipeline_stop(&video->video.entity);
 949
 950         /* Remove all buffers from the IRQ queue. */
 951         spin_lock_irqsave(&video->irqlock, flags);
 952         list_for_each_entry(buffer, &video->irqqueue, queue)
 953                 vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR);
 954         INIT_LIST_HEAD(&video->irqqueue);
 955         spin_unlock_irqrestore(&video->irqlock, flags);
 956 }
 957
 958 static struct vb2_ops vsp1_video_queue_qops = {
 959         .queue_setup = vsp1_video_queue_setup,
 960         .buf_prepare = vsp1_video_buffer_prepare,
 961         .buf_queue = vsp1_video_buffer_queue,
 962         .wait_prepare = vb2_ops_wait_prepare,
 963         .wait_finish = vb2_ops_wait_finish,
 964         .start_streaming = vsp1_video_start_streaming,
 965         .stop_streaming = vsp1_video_stop_streaming,
 966 };
 967
 968 /* -----------------------------------------------------------------------------
 969  * V4L2 ioctls
 970  */
 971
 972 static int
 973 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 974 {
 975         struct v4l2_fh *vfh = file->private_data;
 976         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 977
 978         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
 979                           | V4L2_CAP_VIDEO_CAPTURE_MPLANE
 980                           | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
 981
 982         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 983                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
 984                                  | V4L2_CAP_STREAMING;
 985         else
 986                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
 987                                  | V4L2_CAP_STREAMING;
 988
 989         strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
 990         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 991         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 992                  dev_name(video->vsp1->dev));
 993
 994         return 0;
 995 }
 996
 997 static int
 998 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 999 {
1000         struct v4l2_fh *vfh = file->private_data;
1001         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1002
1003         if (format->type != video->queue.type)
1004                 return -EINVAL;
1005
1006         mutex_lock(&video->lock);
1007         format->fmt.pix_mp = video->format;
1008         mutex_unlock(&video->lock);
1009
1010         return 0;
1011 }
1012
1013 static int
1014 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
1015 {
1016         struct v4l2_fh *vfh = file->private_data;
1017         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1018
1019         if (format->type != video->queue.type)
1020                 return -EINVAL;
1021
1022         return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
1023 }
1024
1025 static int
1026 vsp1_video_set_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         const struct vsp1_format_info *info;
1031         int ret;
1032
1033         if (format->type != video->queue.type)
1034                 return -EINVAL;
1035
1036         ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
1037         if (ret < 0)
1038                 return ret;
1039
1040         mutex_lock(&video->lock);
1041
1042         if (vb2_is_busy(&video->queue)) {
1043                 ret = -EBUSY;
1044                 goto done;
1045         }
1046
1047         video->format = format->fmt.pix_mp;
1048         video->fmtinfo = info;
1049
1050 done:
1051         mutex_unlock(&video->lock);
1052         return ret;
1053 }
1054
1055 static int
1056 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1057 {
1058         struct v4l2_fh *vfh = file->private_data;
1059         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1060         struct vsp1_pipeline *pipe;
1061         int ret;
1062
1063         if (video->queue.owner && video->queue.owner != file->private_data)
1064                 return -EBUSY;
1065
1066         video->sequence = 0;
1067
1068         /* Start streaming on the pipeline. No link touching an entity in the
1069          * pipeline can be activated or deactivated once streaming is started.
1070          *
1071          * Use the VSP1 pipeline object embedded in the first video object that
1072          * starts streaming.
1073          */
1074         pipe = video->video.entity.pipe
1075              ? to_vsp1_pipeline(&video->video.entity) : &video->pipe;
1076
1077         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
1078         if (ret < 0)
1079                 return ret;
1080
1081         /* Verify that the configured format matches the output of the connected
1082          * subdev.
1083          */
1084         ret = vsp1_video_verify_format(video);
1085         if (ret < 0)
1086                 goto err_stop;
1087
1088         ret = vsp1_pipeline_init(pipe, video);
1089         if (ret < 0)
1090                 goto err_stop;
1091
1092         /* Start the queue. */
1093         ret = vb2_streamon(&video->queue, type);
1094         if (ret < 0)
1095                 goto err_cleanup;
1096
1097         return 0;
1098
1099 err_cleanup:
1100         vsp1_pipeline_cleanup(pipe);
1101 err_stop:
1102         media_entity_pipeline_stop(&video->video.entity);
1103         return ret;
1104 }
1105
1106 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
1107         .vidioc_querycap                = vsp1_video_querycap,
1108         .vidioc_g_fmt_vid_cap_mplane    = vsp1_video_get_format,
1109         .vidioc_s_fmt_vid_cap_mplane    = vsp1_video_set_format,
1110         .vidioc_try_fmt_vid_cap_mplane  = vsp1_video_try_format,
1111         .vidioc_g_fmt_vid_out_mplane    = vsp1_video_get_format,
1112         .vidioc_s_fmt_vid_out_mplane    = vsp1_video_set_format,
1113         .vidioc_try_fmt_vid_out_mplane  = vsp1_video_try_format,
1114         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1115         .vidioc_querybuf                = vb2_ioctl_querybuf,
1116         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1117         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1118         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1119         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
1120         .vidioc_streamon                = vsp1_video_streamon,
1121         .vidioc_streamoff               = vb2_ioctl_streamoff,
1122 };
1123
1124 /* -----------------------------------------------------------------------------
1125  * V4L2 File Operations
1126  */
1127
1128 static int vsp1_video_open(struct file *file)
1129 {
1130         struct vsp1_video *video = video_drvdata(file);
1131         struct v4l2_fh *vfh;
1132         int ret = 0;
1133
1134         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
1135         if (vfh == NULL)
1136                 return -ENOMEM;
1137
1138         v4l2_fh_init(vfh, &video->video);
1139         v4l2_fh_add(vfh);
1140
1141         file->private_data = vfh;
1142
1143         ret = vsp1_device_get(video->vsp1);
1144         if (ret < 0) {
1145                 v4l2_fh_del(vfh);
1146                 kfree(vfh);
1147         }
1148
1149         return ret;
1150 }
1151
1152 static int vsp1_video_release(struct file *file)
1153 {
1154         struct vsp1_video *video = video_drvdata(file);
1155         struct v4l2_fh *vfh = file->private_data;
1156
1157         mutex_lock(&video->lock);
1158         if (video->queue.owner == vfh) {
1159                 vb2_queue_release(&video->queue);
1160                 video->queue.owner = NULL;
1161         }
1162         mutex_unlock(&video->lock);
1163
1164         vsp1_device_put(video->vsp1);
1165
1166         v4l2_fh_release(file);
1167
1168         file->private_data = NULL;
1169
1170         return 0;
1171 }
1172
1173 static struct v4l2_file_operations vsp1_video_fops = {
1174         .owner = THIS_MODULE,
1175         .unlocked_ioctl = video_ioctl2,
1176         .open = vsp1_video_open,
1177         .release = vsp1_video_release,
1178         .poll = vb2_fop_poll,
1179         .mmap = vb2_fop_mmap,
1180 };
1181
1182 /* -----------------------------------------------------------------------------
1183  * Initialization and Cleanup
1184  */
1185
1186 int vsp1_video_init(struct vsp1_video *video, struct vsp1_entity *rwpf)
1187 {
1188         const char *direction;
1189         int ret;
1190
1191         switch (video->type) {
1192         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1193                 direction = "output";
1194                 video->pad.flags = MEDIA_PAD_FL_SINK;
1195                 break;
1196
1197         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1198                 direction = "input";
1199                 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1200                 video->video.vfl_dir = VFL_DIR_TX;
1201                 break;
1202
1203         default:
1204                 return -EINVAL;
1205         }
1206
1207         video->rwpf = rwpf;
1208
1209         mutex_init(&video->lock);
1210         spin_lock_init(&video->irqlock);
1211         INIT_LIST_HEAD(&video->irqqueue);
1212
1213         mutex_init(&video->pipe.lock);
1214         spin_lock_init(&video->pipe.irqlock);
1215         INIT_LIST_HEAD(&video->pipe.entities);
1216         init_waitqueue_head(&video->pipe.wq);
1217         video->pipe.state = VSP1_PIPELINE_STOPPED;
1218
1219         /* Initialize the media entity... */
1220         ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
1221         if (ret < 0)
1222                 return ret;
1223
1224         /* ... and the format ... */
1225         video->fmtinfo = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
1226         video->format.pixelformat = video->fmtinfo->fourcc;
1227         video->format.colorspace = V4L2_COLORSPACE_SRGB;
1228         video->format.field = V4L2_FIELD_NONE;
1229         video->format.width = VSP1_VIDEO_DEF_WIDTH;
1230         video->format.height = VSP1_VIDEO_DEF_HEIGHT;
1231         video->format.num_planes = 1;
1232         video->format.plane_fmt[0].bytesperline =
1233                 video->format.width * video->fmtinfo->bpp[0] / 8;
1234         video->format.plane_fmt[0].sizeimage =
1235                 video->format.plane_fmt[0].bytesperline * video->format.height;
1236
1237         /* ... and the video node... */
1238         video->video.v4l2_dev = &video->vsp1->v4l2_dev;
1239         video->video.fops = &vsp1_video_fops;
1240         snprintf(video->video.name, sizeof(video->video.name), "%s %s",
1241                  rwpf->subdev.name, direction);
1242         video->video.vfl_type = VFL_TYPE_GRABBER;
1243         video->video.release = video_device_release_empty;
1244         video->video.ioctl_ops = &vsp1_video_ioctl_ops;
1245
1246         video_set_drvdata(&video->video, video);
1247
1248         /* ... and the buffers queue... */
1249         video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
1250         if (IS_ERR(video->alloc_ctx)) {
1251                 ret = PTR_ERR(video->alloc_ctx);
1252                 goto error;
1253         }
1254
1255         video->queue.type = video->type;
1256         video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1257         video->queue.lock = &video->lock;
1258         video->queue.drv_priv = video;
1259         video->queue.buf_struct_size = sizeof(struct vsp1_video_buffer);
1260         video->queue.ops = &vsp1_video_queue_qops;
1261         video->queue.mem_ops = &vb2_dma_contig_memops;
1262         video->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1263         ret = vb2_queue_init(&video->queue);
1264         if (ret < 0) {
1265                 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
1266                 goto error;
1267         }
1268
1269         /* ... and register the video device. */
1270         video->video.queue = &video->queue;
1271         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1272         if (ret < 0) {
1273                 dev_err(video->vsp1->dev, "failed to register video device\n");
1274                 goto error;
1275         }
1276
1277         return 0;
1278
1279 error:
1280         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1281         vsp1_video_cleanup(video);
1282         return ret;
1283 }
1284
1285 void vsp1_video_cleanup(struct vsp1_video *video)
1286 {
1287         if (video_is_registered(&video->video))
1288                 video_unregister_device(&video->video);
1289
1290         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1291         media_entity_cleanup(&video->video.entity);
1292 }