drivers/media/platform/vsp1/vsp1_video.c

   1 /*
   2  * vsp1_video.c  --  R-Car VSP1 Video Node
   3  *
   4  * Copyright (C) 2013 Renesas Corporation
   5  *
   6  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/list.h>
  15 #include <linux/module.h>
  16 #include <linux/mutex.h>
  17 #include <linux/sched.h>
  18 #include <linux/slab.h>
  19 #include <linux/v4l2-mediabus.h>
  20 #include <linux/videodev2.h>
  21
  22 #include <media/media-entity.h>
  23 #include <media/v4l2-dev.h>
  24 #include <media/v4l2-fh.h>
  25 #include <media/v4l2-ioctl.h>
  26 #include <media/v4l2-subdev.h>
  27 #include <media/videobuf2-core.h>
  28 #include <media/videobuf2-dma-contig.h>
  29
  30 #include "vsp1.h"
  31 #include "vsp1_entity.h"
  32 #include "vsp1_rwpf.h"
  33 #include "vsp1_video.h"
  34
  35 #define VSP1_VIDEO_DEF_FORMAT           V4L2_PIX_FMT_YUYV
  36 #define VSP1_VIDEO_DEF_WIDTH            1024
  37 #define VSP1_VIDEO_DEF_HEIGHT           768
  38
  39 #define VSP1_VIDEO_MIN_WIDTH            2U
  40 #define VSP1_VIDEO_MAX_WIDTH            8190U
  41 #define VSP1_VIDEO_MIN_HEIGHT           2U
  42 #define VSP1_VIDEO_MAX_HEIGHT           8190U
  43
  44 /* -----------------------------------------------------------------------------
  45  * Helper functions
  46  */
  47
  48 static const struct vsp1_format_info vsp1_video_formats[] = {
  49         { V4L2_PIX_FMT_RGB332, V4L2_MBUS_FMT_ARGB8888_1X32,
  50           VI6_FMT_RGB_332, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  51           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  52           1, { 8, 0, 0 }, false, false, 1, 1 },
  53         { V4L2_PIX_FMT_RGB444, V4L2_MBUS_FMT_ARGB8888_1X32,
  54           VI6_FMT_XRGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  55           VI6_RPF_DSWAP_P_WDS,
  56           1, { 16, 0, 0 }, false, false, 1, 1 },
  57         { V4L2_PIX_FMT_RGB555, V4L2_MBUS_FMT_ARGB8888_1X32,
  58           VI6_FMT_XRGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  59           VI6_RPF_DSWAP_P_WDS,
  60           1, { 16, 0, 0 }, false, false, 1, 1 },
  61         { V4L2_PIX_FMT_RGB565, V4L2_MBUS_FMT_ARGB8888_1X32,
  62           VI6_FMT_RGB_565, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  63           VI6_RPF_DSWAP_P_WDS,
  64           1, { 16, 0, 0 }, false, false, 1, 1 },
  65         { V4L2_PIX_FMT_BGR24, V4L2_MBUS_FMT_ARGB8888_1X32,
  66           VI6_FMT_BGR_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  67           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  68           1, { 24, 0, 0 }, false, false, 1, 1 },
  69         { V4L2_PIX_FMT_RGB24, V4L2_MBUS_FMT_ARGB8888_1X32,
  70           VI6_FMT_RGB_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  71           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  72           1, { 24, 0, 0 }, false, false, 1, 1 },
  73         { V4L2_PIX_FMT_BGR32, V4L2_MBUS_FMT_ARGB8888_1X32,
  74           VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
  75           1, { 32, 0, 0 }, false, false, 1, 1 },
  76         { V4L2_PIX_FMT_RGB32, V4L2_MBUS_FMT_ARGB8888_1X32,
  77           VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  78           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  79           1, { 32, 0, 0 }, false, false, 1, 1 },
  80         { V4L2_PIX_FMT_UYVY, V4L2_MBUS_FMT_AYUV8_1X32,
  81           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  82           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  83           1, { 16, 0, 0 }, false, false, 2, 1 },
  84         { V4L2_PIX_FMT_VYUY, V4L2_MBUS_FMT_AYUV8_1X32,
  85           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  86           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  87           1, { 16, 0, 0 }, false, true, 2, 1 },
  88         { V4L2_PIX_FMT_YUYV, V4L2_MBUS_FMT_AYUV8_1X32,
  89           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  90           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  91           1, { 16, 0, 0 }, true, false, 2, 1 },
  92         { V4L2_PIX_FMT_YVYU, V4L2_MBUS_FMT_AYUV8_1X32,
  93           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  94           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  95           1, { 16, 0, 0 }, true, true, 2, 1 },
  96         { V4L2_PIX_FMT_NV12M, V4L2_MBUS_FMT_AYUV8_1X32,
  97           VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  98           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  99           2, { 8, 16, 0 }, false, false, 2, 2 },
 100         { V4L2_PIX_FMT_NV21M, V4L2_MBUS_FMT_AYUV8_1X32,
 101           VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 102           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 103           2, { 8, 16, 0 }, false, true, 2, 2 },
 104         { V4L2_PIX_FMT_NV16M, V4L2_MBUS_FMT_AYUV8_1X32,
 105           VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 106           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 107           2, { 8, 16, 0 }, false, false, 2, 1 },
 108         { V4L2_PIX_FMT_NV61M, V4L2_MBUS_FMT_AYUV8_1X32,
 109           VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 110           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 111           2, { 8, 16, 0 }, false, true, 2, 1 },
 112         { V4L2_PIX_FMT_YUV420M, V4L2_MBUS_FMT_AYUV8_1X32,
 113           VI6_FMT_Y_U_V_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 114           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 115           3, { 8, 8, 8 }, false, false, 2, 2 },
 116 };
 117
 118 /*
 119  * vsp1_get_format_info - Retrieve format information for a 4CC
 120  * @fourcc: the format 4CC
 121  *
 122  * Return a pointer to the format information structure corresponding to the
 123  * given V4L2 format 4CC, or NULL if no corresponding format can be found.
 124  */
 125 static const struct vsp1_format_info *vsp1_get_format_info(u32 fourcc)
 126 {
 127         unsigned int i;
 128
 129         for (i = 0; i < ARRAY_SIZE(vsp1_video_formats); ++i) {
 130                 const struct vsp1_format_info *info = &vsp1_video_formats[i];
 131
 132                 if (info->fourcc == fourcc)
 133                         return info;
 134         }
 135
 136         return NULL;
 137 }
 138
 139
 140 static struct v4l2_subdev *
 141 vsp1_video_remote_subdev(struct media_pad *local, u32 *pad)
 142 {
 143         struct media_pad *remote;
 144
 145         remote = media_entity_remote_pad(local);
 146         if (remote == NULL ||
 147             media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 148                 return NULL;
 149
 150         if (pad)
 151                 *pad = remote->index;
 152
 153         return media_entity_to_v4l2_subdev(remote->entity);
 154 }
 155
 156 static int vsp1_video_verify_format(struct vsp1_video *video)
 157 {
 158         struct v4l2_subdev_format fmt;
 159         struct v4l2_subdev *subdev;
 160         int ret;
 161
 162         subdev = vsp1_video_remote_subdev(&video->pad, &fmt.pad);
 163         if (subdev == NULL)
 164                 return -EINVAL;
 165
 166         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 167         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 168         if (ret < 0)
 169                 return ret == -ENOIOCTLCMD ? -EINVAL : ret;
 170
 171         if (video->fmtinfo->mbus != fmt.format.code ||
 172             video->format.height != fmt.format.height ||
 173             video->format.width != fmt.format.width)
 174                 return -EINVAL;
 175
 176         return 0;
 177 }
 178
 179 static int __vsp1_video_try_format(struct vsp1_video *video,
 180                                    struct v4l2_pix_format_mplane *pix,
 181                                    const struct vsp1_format_info **fmtinfo)
 182 {
 183         const struct vsp1_format_info *info;
 184         unsigned int width = pix->width;
 185         unsigned int height = pix->height;
 186         unsigned int i;
 187
 188         /* Retrieve format information and select the default format if the
 189          * requested format isn't supported.
 190          */
 191         info = vsp1_get_format_info(pix->pixelformat);
 192         if (info == NULL)
 193                 info = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
 194
 195         pix->pixelformat = info->fourcc;
 196         pix->colorspace = V4L2_COLORSPACE_SRGB;
 197         pix->field = V4L2_FIELD_NONE;
 198         memset(pix->reserved, 0, sizeof(pix->reserved));
 199
 200         /* Align the width and height for YUV 4:2:2 and 4:2:0 formats. */
 201         width = round_down(width, info->hsub);
 202         height = round_down(height, info->vsub);
 203
 204         /* Clamp the width and height. */
 205         pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH);
 206         pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT,
 207                             VSP1_VIDEO_MAX_HEIGHT);
 208
 209         /* Compute and clamp the stride and image size. While not documented in
 210          * the datasheet, strides not aligned to a multiple of 128 bytes result
 211          * in image corruption.
 212          */
 213         for (i = 0; i < max(info->planes, 2U); ++i) {
 214                 unsigned int hsub = i > 0 ? info->hsub : 1;
 215                 unsigned int vsub = i > 0 ? info->vsub : 1;
 216                 unsigned int align = 128;
 217                 unsigned int bpl;
 218
 219                 bpl = clamp_t(unsigned int, pix->plane_fmt[i].bytesperline,
 220                               pix->width / hsub * info->bpp[i] / 8,
 221                               round_down(65535U, align));
 222
 223                 pix->plane_fmt[i].bytesperline = round_up(bpl, align);
 224                 pix->plane_fmt[i].sizeimage = pix->plane_fmt[i].bytesperline
 225                                             * pix->height / vsub;
 226         }
 227
 228         if (info->planes == 3) {
 229                 /* The second and third planes must have the same stride. */
 230                 pix->plane_fmt[2].bytesperline = pix->plane_fmt[1].bytesperline;
 231                 pix->plane_fmt[2].sizeimage = pix->plane_fmt[1].sizeimage;
 232         }
 233
 234         pix->num_planes = info->planes;
 235
 236         if (fmtinfo)
 237                 *fmtinfo = info;
 238
 239         return 0;
 240 }
 241
 242 static bool
 243 vsp1_video_format_adjust(struct vsp1_video *video,
 244                          const struct v4l2_pix_format_mplane *format,
 245                          struct v4l2_pix_format_mplane *adjust)
 246 {
 247         unsigned int i;
 248
 249         *adjust = *format;
 250         __vsp1_video_try_format(video, adjust, NULL);
 251
 252         if (format->width != adjust->width ||
 253             format->height != adjust->height ||
 254             format->pixelformat != adjust->pixelformat ||
 255             format->num_planes != adjust->num_planes)
 256                 return false;
 257
 258         for (i = 0; i < format->num_planes; ++i) {
 259                 if (format->plane_fmt[i].bytesperline !=
 260                     adjust->plane_fmt[i].bytesperline)
 261                         return false;
 262
 263                 adjust->plane_fmt[i].sizeimage =
 264                         max(adjust->plane_fmt[i].sizeimage,
 265                             format->plane_fmt[i].sizeimage);
 266         }
 267
 268         return true;
 269 }
 270
 271 /* -----------------------------------------------------------------------------
 272  * Pipeline Management
 273  */
 274
 275 static int vsp1_pipeline_validate_branch(struct vsp1_rwpf *input,
 276                                          struct vsp1_rwpf *output)
 277 {
 278         struct vsp1_entity *entity;
 279         unsigned int entities = 0;
 280         struct media_pad *pad;
 281         bool uds_found = false;
 282
 283         pad = media_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
 284
 285         while (1) {
 286                 if (pad == NULL)
 287                         return -EPIPE;
 288
 289                 /* We've reached a video node, that shouldn't have happened. */
 290                 if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 291                         return -EPIPE;
 292
 293                 entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
 294
 295                 /* We've reached the WPF, we're done. */
 296                 if (entity->type == VSP1_ENTITY_WPF)
 297                         break;
 298
 299                 /* Ensure the branch has no loop. */
 300                 if (entities & (1 << entity->subdev.entity.id))
 301                         return -EPIPE;
 302
 303                 entities |= 1 << entity->subdev.entity.id;
 304
 305                 /* UDS can't be chained. */
 306                 if (entity->type == VSP1_ENTITY_UDS) {
 307                         if (uds_found)
 308                                 return -EPIPE;
 309                         uds_found = true;
 310                 }
 311
 312                 /* Follow the source link. The link setup operations ensure
 313                  * that the output fan-out can't be more than one, there is thus
 314                  * no need to verify here that only a single source link is
 315                  * activated.
 316                  */
 317                 pad = &entity->pads[entity->source_pad];
 318                 pad = media_entity_remote_pad(pad);
 319         }
 320
 321         /* The last entity must be the output WPF. */
 322         if (entity != &output->entity)
 323                 return -EPIPE;
 324
 325         return 0;
 326 }
 327
 328 static int vsp1_pipeline_validate(struct vsp1_pipeline *pipe,
 329                                   struct vsp1_video *video)
 330 {
 331         struct media_entity_graph graph;
 332         struct media_entity *entity = &video->video.entity;
 333         struct media_device *mdev = entity->parent;
 334         unsigned int i;
 335         int ret;
 336
 337         mutex_lock(&mdev->graph_mutex);
 338
 339         /* Walk the graph to locate the entities and video nodes. */
 340         media_entity_graph_walk_start(&graph, entity);
 341
 342         while ((entity = media_entity_graph_walk_next(&graph))) {
 343                 struct v4l2_subdev *subdev;
 344                 struct vsp1_rwpf *rwpf;
 345                 struct vsp1_entity *e;
 346
 347                 if (media_entity_type(entity) != MEDIA_ENT_T_V4L2_SUBDEV) {
 348                         pipe->num_video++;
 349                         continue;
 350                 }
 351
 352                 subdev = media_entity_to_v4l2_subdev(entity);
 353                 e = to_vsp1_entity(subdev);
 354                 list_add_tail(&e->list_pipe, &pipe->entities);
 355
 356                 if (e->type == VSP1_ENTITY_RPF) {
 357                         rwpf = to_rwpf(subdev);
 358                         pipe->inputs[pipe->num_inputs++] = rwpf;
 359                         rwpf->video.pipe_index = pipe->num_inputs;
 360                 } else if (e->type == VSP1_ENTITY_WPF) {
 361                         rwpf = to_rwpf(subdev);
 362                         pipe->output = to_rwpf(subdev);
 363                         rwpf->video.pipe_index = 0;
 364                 } else if (e->type == VSP1_ENTITY_LIF) {
 365                         pipe->lif = e;
 366                 }
 367         }
 368
 369         mutex_unlock(&mdev->graph_mutex);
 370
 371         /* We need one output and at least one input. */
 372         if (pipe->num_inputs == 0 || !pipe->output) {
 373                 ret = -EPIPE;
 374                 goto error;
 375         }
 376
 377         /* Follow links downstream for each input and make sure the graph
 378          * contains no loop and that all branches end at the output WPF.
 379          */
 380         for (i = 0; i < pipe->num_inputs; ++i) {
 381                 ret = vsp1_pipeline_validate_branch(pipe->inputs[i],
 382                                                     pipe->output);
 383                 if (ret < 0)
 384                         goto error;
 385         }
 386
 387         return 0;
 388
 389 error:
 390         INIT_LIST_HEAD(&pipe->entities);
 391         pipe->buffers_ready = 0;
 392         pipe->num_video = 0;
 393         pipe->num_inputs = 0;
 394         pipe->output = NULL;
 395         pipe->lif = NULL;
 396         return ret;
 397 }
 398
 399 static int vsp1_pipeline_init(struct vsp1_pipeline *pipe,
 400                               struct vsp1_video *video)
 401 {
 402         int ret;
 403
 404         mutex_lock(&pipe->lock);
 405
 406         /* If we're the first user validate and initialize the pipeline. */
 407         if (pipe->use_count == 0) {
 408                 ret = vsp1_pipeline_validate(pipe, video);
 409                 if (ret < 0)
 410                         goto done;
 411         }
 412
 413         pipe->use_count++;
 414         ret = 0;
 415
 416 done:
 417         mutex_unlock(&pipe->lock);
 418         return ret;
 419 }
 420
 421 static void vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
 422 {
 423         mutex_lock(&pipe->lock);
 424
 425         /* If we're the last user clean up the pipeline. */
 426         if (--pipe->use_count == 0) {
 427                 INIT_LIST_HEAD(&pipe->entities);
 428                 pipe->state = VSP1_PIPELINE_STOPPED;
 429                 pipe->buffers_ready = 0;
 430                 pipe->num_video = 0;
 431                 pipe->num_inputs = 0;
 432                 pipe->output = NULL;
 433                 pipe->lif = NULL;
 434         }
 435
 436         mutex_unlock(&pipe->lock);
 437 }
 438
 439 static void vsp1_pipeline_run(struct vsp1_pipeline *pipe)
 440 {
 441         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 442
 443         vsp1_write(vsp1, VI6_CMD(pipe->output->entity.index), VI6_CMD_STRCMD);
 444         pipe->state = VSP1_PIPELINE_RUNNING;
 445         pipe->buffers_ready = 0;
 446 }
 447
 448 static int vsp1_pipeline_stop(struct vsp1_pipeline *pipe)
 449 {
 450         struct vsp1_entity *entity;
 451         unsigned long flags;
 452         int ret;
 453
 454         spin_lock_irqsave(&pipe->irqlock, flags);
 455         pipe->state = VSP1_PIPELINE_STOPPING;
 456         spin_unlock_irqrestore(&pipe->irqlock, flags);
 457
 458         ret = wait_event_timeout(pipe->wq, pipe->state == VSP1_PIPELINE_STOPPED,
 459                                  msecs_to_jiffies(500));
 460         ret = ret == 0 ? -ETIMEDOUT : 0;
 461
 462         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 463                 if (entity->route)
 464                         vsp1_write(entity->vsp1, entity->route,
 465                                    VI6_DPR_NODE_UNUSED);
 466
 467                 v4l2_subdev_call(&entity->subdev, video, s_stream, 0);
 468         }
 469
 470         return ret;
 471 }
 472
 473 static bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe)
 474 {
 475         unsigned int mask;
 476
 477         mask = ((1 << pipe->num_inputs) - 1) << 1;
 478         if (!pipe->lif)
 479                 mask |= 1 << 0;
 480
 481         return pipe->buffers_ready == mask;
 482 }
 483
 484 /*
 485  * vsp1_video_complete_buffer - Complete the current buffer
 486  * @video: the video node
 487  *
 488  * This function completes the current buffer by filling its sequence number,
 489  * time stamp and payload size, and hands it back to the videobuf core.
 490  *
 491  * When operating in DU output mode (deep pipeline to the DU through the LIF),
 492  * the VSP1 needs to constantly supply frames to the display. In that case, if
 493  * no other buffer is queued, reuse the one that has just been processed instead
 494  * of handing it back to the videobuf core.
 495  *
 496  * Return the next queued buffer or NULL if the queue is empty.
 497  */
 498 static struct vsp1_video_buffer *
 499 vsp1_video_complete_buffer(struct vsp1_video *video)
 500 {
 501         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 502         struct vsp1_video_buffer *next = NULL;
 503         struct vsp1_video_buffer *done;
 504         unsigned long flags;
 505         unsigned int i;
 506
 507         spin_lock_irqsave(&video->irqlock, flags);
 508
 509         if (list_empty(&video->irqqueue)) {
 510                 spin_unlock_irqrestore(&video->irqlock, flags);
 511                 return NULL;
 512         }
 513
 514         done = list_first_entry(&video->irqqueue,
 515                                 struct vsp1_video_buffer, queue);
 516
 517         /* In DU output mode reuse the buffer if the list is singular. */
 518         if (pipe->lif && list_is_singular(&video->irqqueue)) {
 519                 spin_unlock_irqrestore(&video->irqlock, flags);
 520                 return done;
 521         }
 522
 523         list_del(&done->queue);
 524
 525         if (!list_empty(&video->irqqueue))
 526                 next = list_first_entry(&video->irqqueue,
 527                                         struct vsp1_video_buffer, queue);
 528
 529         spin_unlock_irqrestore(&video->irqlock, flags);
 530
 531         done->buf.v4l2_buf.sequence = video->sequence++;
 532         v4l2_get_timestamp(&done->buf.v4l2_buf.timestamp);
 533         for (i = 0; i < done->buf.num_planes; ++i)
 534                 vb2_set_plane_payload(&done->buf, i, done->length[i]);
 535         vb2_buffer_done(&done->buf, VB2_BUF_STATE_DONE);
 536
 537         return next;
 538 }
 539
 540 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
 541                                  struct vsp1_video *video)
 542 {
 543         struct vsp1_video_buffer *buf;
 544         unsigned long flags;
 545
 546         buf = vsp1_video_complete_buffer(video);
 547         if (buf == NULL)
 548                 return;
 549
 550         spin_lock_irqsave(&pipe->irqlock, flags);
 551
 552         video->ops->queue(video, buf);
 553         pipe->buffers_ready |= 1 << video->pipe_index;
 554
 555         spin_unlock_irqrestore(&pipe->irqlock, flags);
 556 }
 557
 558 void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
 559 {
 560         unsigned long flags;
 561         unsigned int i;
 562
 563         if (pipe == NULL)
 564                 return;
 565
 566         /* Complete buffers on all video nodes. */
 567         for (i = 0; i < pipe->num_inputs; ++i)
 568                 vsp1_video_frame_end(pipe, &pipe->inputs[i]->video);
 569
 570         if (!pipe->lif)
 571                 vsp1_video_frame_end(pipe, &pipe->output->video);
 572
 573         spin_lock_irqsave(&pipe->irqlock, flags);
 574
 575         /* If a stop has been requested, mark the pipeline as stopped and
 576          * return.
 577          */
 578         if (pipe->state == VSP1_PIPELINE_STOPPING) {
 579                 pipe->state = VSP1_PIPELINE_STOPPED;
 580                 wake_up(&pipe->wq);
 581                 goto done;
 582         }
 583
 584         /* Restart the pipeline if ready. */
 585         if (vsp1_pipeline_ready(pipe))
 586                 vsp1_pipeline_run(pipe);
 587
 588 done:
 589         spin_unlock_irqrestore(&pipe->irqlock, flags);
 590 }
 591
 592 /* -----------------------------------------------------------------------------
 593  * videobuf2 Queue Operations
 594  */
 595
 596 static int
 597 vsp1_video_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 598                      unsigned int *nbuffers, unsigned int *nplanes,
 599                      unsigned int sizes[], void *alloc_ctxs[])
 600 {
 601         struct vsp1_video *video = vb2_get_drv_priv(vq);
 602         const struct v4l2_pix_format_mplane *format;
 603         struct v4l2_pix_format_mplane pix_mp;
 604         unsigned int i;
 605
 606         if (fmt) {
 607                 /* Make sure the format is valid and adjust the sizeimage field
 608                  * if needed.
 609                  */
 610                 if (!vsp1_video_format_adjust(video, &fmt->fmt.pix_mp, &pix_mp))
 611                         return -EINVAL;
 612
 613                 format = &pix_mp;
 614         } else {
 615                 format = &video->format;
 616         }
 617
 618         *nplanes = format->num_planes;
 619
 620         for (i = 0; i < format->num_planes; ++i) {
 621                 sizes[i] = format->plane_fmt[i].sizeimage;
 622                 alloc_ctxs[i] = video->alloc_ctx;
 623         }
 624
 625         return 0;
 626 }
 627
 628 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
 629 {
 630         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 631         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
 632         const struct v4l2_pix_format_mplane *format = &video->format;
 633         unsigned int i;
 634
 635         if (vb->num_planes < format->num_planes)
 636                 return -EINVAL;
 637
 638         for (i = 0; i < vb->num_planes; ++i) {
 639                 buf->addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 640                 buf->length[i] = vb2_plane_size(vb, i);
 641
 642                 if (buf->length[i] < format->plane_fmt[i].sizeimage)
 643                         return -EINVAL;
 644         }
 645
 646         return 0;
 647 }
 648
 649 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
 650 {
 651         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 652         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 653         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
 654         unsigned long flags;
 655         bool empty;
 656
 657         spin_lock_irqsave(&video->irqlock, flags);
 658         empty = list_empty(&video->irqqueue);
 659         list_add_tail(&buf->queue, &video->irqqueue);
 660         spin_unlock_irqrestore(&video->irqlock, flags);
 661
 662         if (!empty)
 663                 return;
 664
 665         spin_lock_irqsave(&pipe->irqlock, flags);
 666
 667         video->ops->queue(video, buf);
 668         pipe->buffers_ready |= 1 << video->pipe_index;
 669
 670         if (vb2_is_streaming(&video->queue) &&
 671             vsp1_pipeline_ready(pipe))
 672                 vsp1_pipeline_run(pipe);
 673
 674         spin_unlock_irqrestore(&pipe->irqlock, flags);
 675 }
 676
 677 static void vsp1_entity_route_setup(struct vsp1_entity *source)
 678 {
 679         struct vsp1_entity *sink;
 680
 681         if (source->route == 0)
 682                 return;
 683
 684         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
 685         vsp1_write(source->vsp1, source->route, sink->id);
 686 }
 687
 688 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 689 {
 690         struct vsp1_video *video = vb2_get_drv_priv(vq);
 691         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 692         struct vsp1_entity *entity;
 693         unsigned long flags;
 694         int ret;
 695
 696         mutex_lock(&pipe->lock);
 697         if (pipe->stream_count == pipe->num_video - 1) {
 698                 list_for_each_entry(entity, &pipe->entities, list_pipe) {
 699                         vsp1_entity_route_setup(entity);
 700
 701                         ret = v4l2_subdev_call(&entity->subdev, video,
 702                                                s_stream, 1);
 703                         if (ret < 0) {
 704                                 mutex_unlock(&pipe->lock);
 705                                 return ret;
 706                         }
 707                 }
 708         }
 709
 710         pipe->stream_count++;
 711         mutex_unlock(&pipe->lock);
 712
 713         spin_lock_irqsave(&pipe->irqlock, flags);
 714         if (vsp1_pipeline_ready(pipe))
 715                 vsp1_pipeline_run(pipe);
 716         spin_unlock_irqrestore(&pipe->irqlock, flags);
 717
 718         return 0;
 719 }
 720
 721 static int vsp1_video_stop_streaming(struct vb2_queue *vq)
 722 {
 723         struct vsp1_video *video = vb2_get_drv_priv(vq);
 724         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 725         unsigned long flags;
 726         int ret;
 727
 728         mutex_lock(&pipe->lock);
 729         if (--pipe->stream_count == 0) {
 730                 /* Stop the pipeline. */
 731                 ret = vsp1_pipeline_stop(pipe);
 732                 if (ret == -ETIMEDOUT)
 733                         dev_err(video->vsp1->dev, "pipeline stop timeout\n");
 734         }
 735         mutex_unlock(&pipe->lock);
 736
 737         vsp1_pipeline_cleanup(pipe);
 738         media_entity_pipeline_stop(&video->video.entity);
 739
 740         /* Remove all buffers from the IRQ queue. */
 741         spin_lock_irqsave(&video->irqlock, flags);
 742         INIT_LIST_HEAD(&video->irqqueue);
 743         spin_unlock_irqrestore(&video->irqlock, flags);
 744
 745         return 0;
 746 }
 747
 748 static struct vb2_ops vsp1_video_queue_qops = {
 749         .queue_setup = vsp1_video_queue_setup,
 750         .buf_prepare = vsp1_video_buffer_prepare,
 751         .buf_queue = vsp1_video_buffer_queue,
 752         .wait_prepare = vb2_ops_wait_prepare,
 753         .wait_finish = vb2_ops_wait_finish,
 754         .start_streaming = vsp1_video_start_streaming,
 755         .stop_streaming = vsp1_video_stop_streaming,
 756 };
 757
 758 /* -----------------------------------------------------------------------------
 759  * V4L2 ioctls
 760  */
 761
 762 static int
 763 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 764 {
 765         struct v4l2_fh *vfh = file->private_data;
 766         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 767
 768         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
 769                           | V4L2_CAP_VIDEO_CAPTURE_MPLANE
 770                           | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
 771
 772         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 773                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
 774                                  | V4L2_CAP_STREAMING;
 775         else
 776                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
 777                                  | V4L2_CAP_STREAMING;
 778
 779         strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
 780         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 781         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 782                  dev_name(video->vsp1->dev));
 783
 784         return 0;
 785 }
 786
 787 static int
 788 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 789 {
 790         struct v4l2_fh *vfh = file->private_data;
 791         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 792
 793         if (format->type != video->queue.type)
 794                 return -EINVAL;
 795
 796         mutex_lock(&video->lock);
 797         format->fmt.pix_mp = video->format;
 798         mutex_unlock(&video->lock);
 799
 800         return 0;
 801 }
 802
 803 static int
 804 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 805 {
 806         struct v4l2_fh *vfh = file->private_data;
 807         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 808
 809         if (format->type != video->queue.type)
 810                 return -EINVAL;
 811
 812         return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
 813 }
 814
 815 static int
 816 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 817 {
 818         struct v4l2_fh *vfh = file->private_data;
 819         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 820         const struct vsp1_format_info *info;
 821         int ret;
 822
 823         if (format->type != video->queue.type)
 824                 return -EINVAL;
 825
 826         ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
 827         if (ret < 0)
 828                 return ret;
 829
 830         mutex_lock(&video->lock);
 831
 832         if (vb2_is_busy(&video->queue)) {
 833                 ret = -EBUSY;
 834                 goto done;
 835         }
 836
 837         video->format = format->fmt.pix_mp;
 838         video->fmtinfo = info;
 839
 840 done:
 841         mutex_unlock(&video->lock);
 842         return ret;
 843 }
 844
 845 static int
 846 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 847 {
 848         struct v4l2_fh *vfh = file->private_data;
 849         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 850         struct vsp1_pipeline *pipe;
 851         int ret;
 852
 853         if (video->queue.owner && video->queue.owner != file->private_data)
 854                 return -EBUSY;
 855
 856         video->sequence = 0;
 857
 858         /* Start streaming on the pipeline. No link touching an entity in the
 859          * pipeline can be activated or deactivated once streaming is started.
 860          *
 861          * Use the VSP1 pipeline object embedded in the first video object that
 862          * starts streaming.
 863          */
 864         pipe = video->video.entity.pipe
 865              ? to_vsp1_pipeline(&video->video.entity) : &video->pipe;
 866
 867         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
 868         if (ret < 0)
 869                 return ret;
 870
 871         /* Verify that the configured format matches the output of the connected
 872          * subdev.
 873          */
 874         ret = vsp1_video_verify_format(video);
 875         if (ret < 0)
 876                 goto err_stop;
 877
 878         ret = vsp1_pipeline_init(pipe, video);
 879         if (ret < 0)
 880                 goto err_stop;
 881
 882         /* Start the queue. */
 883         ret = vb2_streamon(&video->queue, type);
 884         if (ret < 0)
 885                 goto err_cleanup;
 886
 887         return 0;
 888
 889 err_cleanup:
 890         vsp1_pipeline_cleanup(pipe);
 891 err_stop:
 892         media_entity_pipeline_stop(&video->video.entity);
 893         return ret;
 894 }
 895
 896 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
 897         .vidioc_querycap                = vsp1_video_querycap,
 898         .vidioc_g_fmt_vid_cap_mplane    = vsp1_video_get_format,
 899         .vidioc_s_fmt_vid_cap_mplane    = vsp1_video_set_format,
 900         .vidioc_try_fmt_vid_cap_mplane  = vsp1_video_try_format,
 901         .vidioc_g_fmt_vid_out_mplane    = vsp1_video_get_format,
 902         .vidioc_s_fmt_vid_out_mplane    = vsp1_video_set_format,
 903         .vidioc_try_fmt_vid_out_mplane  = vsp1_video_try_format,
 904         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 905         .vidioc_querybuf                = vb2_ioctl_querybuf,
 906         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 907         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 908         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 909         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 910         .vidioc_streamon                = vsp1_video_streamon,
 911         .vidioc_streamoff               = vb2_ioctl_streamoff,
 912 };
 913
 914 /* -----------------------------------------------------------------------------
 915  * V4L2 File Operations
 916  */
 917
 918 static int vsp1_video_open(struct file *file)
 919 {
 920         struct vsp1_video *video = video_drvdata(file);
 921         struct v4l2_fh *vfh;
 922         int ret = 0;
 923
 924         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
 925         if (vfh == NULL)
 926                 return -ENOMEM;
 927
 928         v4l2_fh_init(vfh, &video->video);
 929         v4l2_fh_add(vfh);
 930
 931         file->private_data = vfh;
 932
 933         if (!vsp1_device_get(video->vsp1)) {
 934                 ret = -EBUSY;
 935                 v4l2_fh_del(vfh);
 936                 kfree(vfh);
 937         }
 938
 939         return ret;
 940 }
 941
 942 static int vsp1_video_release(struct file *file)
 943 {
 944         struct vsp1_video *video = video_drvdata(file);
 945         struct v4l2_fh *vfh = file->private_data;
 946
 947         mutex_lock(&video->lock);
 948         if (video->queue.owner == vfh) {
 949                 vb2_queue_release(&video->queue);
 950                 video->queue.owner = NULL;
 951         }
 952         mutex_unlock(&video->lock);
 953
 954         vsp1_device_put(video->vsp1);
 955
 956         v4l2_fh_release(file);
 957
 958         file->private_data = NULL;
 959
 960         return 0;
 961 }
 962
 963 static struct v4l2_file_operations vsp1_video_fops = {
 964         .owner = THIS_MODULE,
 965         .unlocked_ioctl = video_ioctl2,
 966         .open = vsp1_video_open,
 967         .release = vsp1_video_release,
 968         .poll = vb2_fop_poll,
 969         .mmap = vb2_fop_mmap,
 970 };
 971
 972 /* -----------------------------------------------------------------------------
 973  * Initialization and Cleanup
 974  */
 975
 976 int vsp1_video_init(struct vsp1_video *video, struct vsp1_entity *rwpf)
 977 {
 978         const char *direction;
 979         int ret;
 980
 981         switch (video->type) {
 982         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 983                 direction = "output";
 984                 video->pad.flags = MEDIA_PAD_FL_SINK;
 985                 break;
 986
 987         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 988                 direction = "input";
 989                 video->pad.flags = MEDIA_PAD_FL_SOURCE;
 990                 video->video.vfl_dir = VFL_DIR_TX;
 991                 break;
 992
 993         default:
 994                 return -EINVAL;
 995         }
 996
 997         video->rwpf = rwpf;
 998
 999         mutex_init(&video->lock);
1000         spin_lock_init(&video->irqlock);
1001         INIT_LIST_HEAD(&video->irqqueue);
1002
1003         mutex_init(&video->pipe.lock);
1004         spin_lock_init(&video->pipe.irqlock);
1005         INIT_LIST_HEAD(&video->pipe.entities);
1006         init_waitqueue_head(&video->pipe.wq);
1007         video->pipe.state = VSP1_PIPELINE_STOPPED;
1008
1009         /* Initialize the media entity... */
1010         ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1011         if (ret < 0)
1012                 return ret;
1013
1014         /* ... and the format ... */
1015         video->fmtinfo = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
1016         video->format.pixelformat = video->fmtinfo->fourcc;
1017         video->format.colorspace = V4L2_COLORSPACE_SRGB;
1018         video->format.field = V4L2_FIELD_NONE;
1019         video->format.width = VSP1_VIDEO_DEF_WIDTH;
1020         video->format.height = VSP1_VIDEO_DEF_HEIGHT;
1021         video->format.num_planes = 1;
1022         video->format.plane_fmt[0].bytesperline =
1023                 video->format.width * video->fmtinfo->bpp[0] / 8;
1024         video->format.plane_fmt[0].sizeimage =
1025                 video->format.plane_fmt[0].bytesperline * video->format.height;
1026
1027         /* ... and the video node... */
1028         video->video.v4l2_dev = &video->vsp1->v4l2_dev;
1029         video->video.fops = &vsp1_video_fops;
1030         snprintf(video->video.name, sizeof(video->video.name), "%s %s",
1031                  rwpf->subdev.name, direction);
1032         video->video.vfl_type = VFL_TYPE_GRABBER;
1033         video->video.release = video_device_release_empty;
1034         video->video.ioctl_ops = &vsp1_video_ioctl_ops;
1035
1036         video_set_drvdata(&video->video, video);
1037
1038         /* ... and the buffers queue... */
1039         video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
1040         if (IS_ERR(video->alloc_ctx)) {
1041                 ret = PTR_ERR(video->alloc_ctx);
1042                 goto error;
1043         }
1044
1045         video->queue.type = video->type;
1046         video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1047         video->queue.lock = &video->lock;
1048         video->queue.drv_priv = video;
1049         video->queue.buf_struct_size = sizeof(struct vsp1_video_buffer);
1050         video->queue.ops = &vsp1_video_queue_qops;
1051         video->queue.mem_ops = &vb2_dma_contig_memops;
1052         video->queue.timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1053         ret = vb2_queue_init(&video->queue);
1054         if (ret < 0) {
1055                 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
1056                 goto error;
1057         }
1058
1059         /* ... and register the video device. */
1060         video->video.queue = &video->queue;
1061         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1062         if (ret < 0) {
1063                 dev_err(video->vsp1->dev, "failed to register video device\n");
1064                 goto error;
1065         }
1066
1067         return 0;
1068
1069 error:
1070         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1071         vsp1_video_cleanup(video);
1072         return ret;
1073 }
1074
1075 void vsp1_video_cleanup(struct vsp1_video *video)
1076 {
1077         if (video_is_registered(&video->video))
1078                 video_unregister_device(&video->video);
1079
1080         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1081         media_entity_cleanup(&video->video.entity);
1082 }