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  * Return the next queued buffer or NULL if the queue is empty.
 492  */
 493 static struct vsp1_video_buffer *
 494 vsp1_video_complete_buffer(struct vsp1_video *video)
 495 {
 496         struct vsp1_video_buffer *next = NULL;
 497         struct vsp1_video_buffer *done;
 498         unsigned long flags;
 499         unsigned int i;
 500
 501         spin_lock_irqsave(&video->irqlock, flags);
 502
 503         if (list_empty(&video->irqqueue)) {
 504                 spin_unlock_irqrestore(&video->irqlock, flags);
 505                 return NULL;
 506         }
 507
 508         done = list_first_entry(&video->irqqueue,
 509                                 struct vsp1_video_buffer, queue);
 510         list_del(&done->queue);
 511
 512         if (!list_empty(&video->irqqueue))
 513                 next = list_first_entry(&video->irqqueue,
 514                                         struct vsp1_video_buffer, queue);
 515
 516         spin_unlock_irqrestore(&video->irqlock, flags);
 517
 518         done->buf.v4l2_buf.sequence = video->sequence++;
 519         v4l2_get_timestamp(&done->buf.v4l2_buf.timestamp);
 520         for (i = 0; i < done->buf.num_planes; ++i)
 521                 vb2_set_plane_payload(&done->buf, i, done->length[i]);
 522         vb2_buffer_done(&done->buf, VB2_BUF_STATE_DONE);
 523
 524         return next;
 525 }
 526
 527 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
 528                                  struct vsp1_video *video)
 529 {
 530         struct vsp1_video_buffer *buf;
 531         unsigned long flags;
 532
 533         buf = vsp1_video_complete_buffer(video);
 534         if (buf == NULL)
 535                 return;
 536
 537         spin_lock_irqsave(&pipe->irqlock, flags);
 538
 539         video->ops->queue(video, buf);
 540         pipe->buffers_ready |= 1 << video->pipe_index;
 541
 542         spin_unlock_irqrestore(&pipe->irqlock, flags);
 543 }
 544
 545 void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
 546 {
 547         unsigned long flags;
 548         unsigned int i;
 549
 550         if (pipe == NULL)
 551                 return;
 552
 553         /* Complete buffers on all video nodes. */
 554         for (i = 0; i < pipe->num_inputs; ++i)
 555                 vsp1_video_frame_end(pipe, &pipe->inputs[i]->video);
 556
 557         if (!pipe->lif)
 558                 vsp1_video_frame_end(pipe, &pipe->output->video);
 559
 560         spin_lock_irqsave(&pipe->irqlock, flags);
 561
 562         /* If a stop has been requested, mark the pipeline as stopped and
 563          * return.
 564          */
 565         if (pipe->state == VSP1_PIPELINE_STOPPING) {
 566                 pipe->state = VSP1_PIPELINE_STOPPED;
 567                 wake_up(&pipe->wq);
 568                 goto done;
 569         }
 570
 571         /* Restart the pipeline if ready. */
 572         if (vsp1_pipeline_ready(pipe))
 573                 vsp1_pipeline_run(pipe);
 574
 575 done:
 576         spin_unlock_irqrestore(&pipe->irqlock, flags);
 577 }
 578
 579 /* -----------------------------------------------------------------------------
 580  * videobuf2 Queue Operations
 581  */
 582
 583 static int
 584 vsp1_video_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 585                      unsigned int *nbuffers, unsigned int *nplanes,
 586                      unsigned int sizes[], void *alloc_ctxs[])
 587 {
 588         struct vsp1_video *video = vb2_get_drv_priv(vq);
 589         const struct v4l2_pix_format_mplane *format;
 590         struct v4l2_pix_format_mplane pix_mp;
 591         unsigned int i;
 592
 593         if (fmt) {
 594                 /* Make sure the format is valid and adjust the sizeimage field
 595                  * if needed.
 596                  */
 597                 if (!vsp1_video_format_adjust(video, &fmt->fmt.pix_mp, &pix_mp))
 598                         return -EINVAL;
 599
 600                 format = &pix_mp;
 601         } else {
 602                 format = &video->format;
 603         }
 604
 605         *nplanes = format->num_planes;
 606
 607         for (i = 0; i < format->num_planes; ++i) {
 608                 sizes[i] = format->plane_fmt[i].sizeimage;
 609                 alloc_ctxs[i] = video->alloc_ctx;
 610         }
 611
 612         return 0;
 613 }
 614
 615 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
 616 {
 617         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 618         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
 619         const struct v4l2_pix_format_mplane *format = &video->format;
 620         unsigned int i;
 621
 622         if (vb->num_planes < format->num_planes)
 623                 return -EINVAL;
 624
 625         buf->video = video;
 626
 627         for (i = 0; i < vb->num_planes; ++i) {
 628                 buf->addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 629                 buf->length[i] = vb2_plane_size(vb, i);
 630
 631                 if (buf->length[i] < format->plane_fmt[i].sizeimage)
 632                         return -EINVAL;
 633         }
 634
 635         return 0;
 636 }
 637
 638 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
 639 {
 640         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 641         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 642         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
 643         unsigned long flags;
 644         bool empty;
 645
 646         spin_lock_irqsave(&video->irqlock, flags);
 647         empty = list_empty(&video->irqqueue);
 648         list_add_tail(&buf->queue, &video->irqqueue);
 649         spin_unlock_irqrestore(&video->irqlock, flags);
 650
 651         if (!empty)
 652                 return;
 653
 654         spin_lock_irqsave(&pipe->irqlock, flags);
 655
 656         video->ops->queue(video, buf);
 657         pipe->buffers_ready |= 1 << video->pipe_index;
 658
 659         if (vb2_is_streaming(&video->queue) &&
 660             vsp1_pipeline_ready(pipe))
 661                 vsp1_pipeline_run(pipe);
 662
 663         spin_unlock_irqrestore(&pipe->irqlock, flags);
 664 }
 665
 666 static void vsp1_entity_route_setup(struct vsp1_entity *source)
 667 {
 668         struct vsp1_entity *sink;
 669
 670         if (source->route == 0)
 671                 return;
 672
 673         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
 674         vsp1_write(source->vsp1, source->route, sink->id);
 675 }
 676
 677 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 678 {
 679         struct vsp1_video *video = vb2_get_drv_priv(vq);
 680         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 681         struct vsp1_entity *entity;
 682         unsigned long flags;
 683         int ret;
 684
 685         mutex_lock(&pipe->lock);
 686         if (pipe->stream_count == pipe->num_video - 1) {
 687                 list_for_each_entry(entity, &pipe->entities, list_pipe) {
 688                         vsp1_entity_route_setup(entity);
 689
 690                         ret = v4l2_subdev_call(&entity->subdev, video,
 691                                                s_stream, 1);
 692                         if (ret < 0) {
 693                                 mutex_unlock(&pipe->lock);
 694                                 return ret;
 695                         }
 696                 }
 697         }
 698
 699         pipe->stream_count++;
 700         mutex_unlock(&pipe->lock);
 701
 702         spin_lock_irqsave(&pipe->irqlock, flags);
 703         if (vsp1_pipeline_ready(pipe))
 704                 vsp1_pipeline_run(pipe);
 705         spin_unlock_irqrestore(&pipe->irqlock, flags);
 706
 707         return 0;
 708 }
 709
 710 static int vsp1_video_stop_streaming(struct vb2_queue *vq)
 711 {
 712         struct vsp1_video *video = vb2_get_drv_priv(vq);
 713         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 714         unsigned long flags;
 715         int ret;
 716
 717         mutex_lock(&pipe->lock);
 718         if (--pipe->stream_count == 0) {
 719                 /* Stop the pipeline. */
 720                 ret = vsp1_pipeline_stop(pipe);
 721                 if (ret == -ETIMEDOUT)
 722                         dev_err(video->vsp1->dev, "pipeline stop timeout\n");
 723         }
 724         mutex_unlock(&pipe->lock);
 725
 726         vsp1_pipeline_cleanup(pipe);
 727         media_entity_pipeline_stop(&video->video.entity);
 728
 729         /* Remove all buffers from the IRQ queue. */
 730         spin_lock_irqsave(&video->irqlock, flags);
 731         INIT_LIST_HEAD(&video->irqqueue);
 732         spin_unlock_irqrestore(&video->irqlock, flags);
 733
 734         return 0;
 735 }
 736
 737 static struct vb2_ops vsp1_video_queue_qops = {
 738         .queue_setup = vsp1_video_queue_setup,
 739         .buf_prepare = vsp1_video_buffer_prepare,
 740         .buf_queue = vsp1_video_buffer_queue,
 741         .wait_prepare = vb2_ops_wait_prepare,
 742         .wait_finish = vb2_ops_wait_finish,
 743         .start_streaming = vsp1_video_start_streaming,
 744         .stop_streaming = vsp1_video_stop_streaming,
 745 };
 746
 747 /* -----------------------------------------------------------------------------
 748  * V4L2 ioctls
 749  */
 750
 751 static int
 752 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 753 {
 754         struct v4l2_fh *vfh = file->private_data;
 755         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 756
 757         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
 758                           | V4L2_CAP_VIDEO_CAPTURE_MPLANE
 759                           | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
 760
 761         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 762                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
 763                                  | V4L2_CAP_STREAMING;
 764         else
 765                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
 766                                  | V4L2_CAP_STREAMING;
 767
 768         strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
 769         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 770         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 771                  dev_name(video->vsp1->dev));
 772
 773         return 0;
 774 }
 775
 776 static int
 777 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 778 {
 779         struct v4l2_fh *vfh = file->private_data;
 780         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 781
 782         if (format->type != video->queue.type)
 783                 return -EINVAL;
 784
 785         mutex_lock(&video->lock);
 786         format->fmt.pix_mp = video->format;
 787         mutex_unlock(&video->lock);
 788
 789         return 0;
 790 }
 791
 792 static int
 793 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 794 {
 795         struct v4l2_fh *vfh = file->private_data;
 796         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 797
 798         if (format->type != video->queue.type)
 799                 return -EINVAL;
 800
 801         return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
 802 }
 803
 804 static int
 805 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 806 {
 807         struct v4l2_fh *vfh = file->private_data;
 808         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 809         const struct vsp1_format_info *info;
 810         int ret;
 811
 812         if (format->type != video->queue.type)
 813                 return -EINVAL;
 814
 815         ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
 816         if (ret < 0)
 817                 return ret;
 818
 819         mutex_lock(&video->lock);
 820
 821         if (vb2_is_busy(&video->queue)) {
 822                 ret = -EBUSY;
 823                 goto done;
 824         }
 825
 826         video->format = format->fmt.pix_mp;
 827         video->fmtinfo = info;
 828
 829 done:
 830         mutex_unlock(&video->lock);
 831         return ret;
 832 }
 833
 834 static int
 835 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 836 {
 837         struct v4l2_fh *vfh = file->private_data;
 838         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 839         struct vsp1_pipeline *pipe;
 840         int ret;
 841
 842         if (video->queue.owner && video->queue.owner != file->private_data)
 843                 return -EBUSY;
 844
 845         video->sequence = 0;
 846
 847         /* Start streaming on the pipeline. No link touching an entity in the
 848          * pipeline can be activated or deactivated once streaming is started.
 849          *
 850          * Use the VSP1 pipeline object embedded in the first video object that
 851          * starts streaming.
 852          */
 853         pipe = video->video.entity.pipe
 854              ? to_vsp1_pipeline(&video->video.entity) : &video->pipe;
 855
 856         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
 857         if (ret < 0)
 858                 return ret;
 859
 860         /* Verify that the configured format matches the output of the connected
 861          * subdev.
 862          */
 863         ret = vsp1_video_verify_format(video);
 864         if (ret < 0)
 865                 goto err_stop;
 866
 867         ret = vsp1_pipeline_init(pipe, video);
 868         if (ret < 0)
 869                 goto err_stop;
 870
 871         /* Start the queue. */
 872         ret = vb2_streamon(&video->queue, type);
 873         if (ret < 0)
 874                 goto err_cleanup;
 875
 876         return 0;
 877
 878 err_cleanup:
 879         vsp1_pipeline_cleanup(pipe);
 880 err_stop:
 881         media_entity_pipeline_stop(&video->video.entity);
 882         return ret;
 883 }
 884
 885 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
 886         .vidioc_querycap                = vsp1_video_querycap,
 887         .vidioc_g_fmt_vid_cap_mplane    = vsp1_video_get_format,
 888         .vidioc_s_fmt_vid_cap_mplane    = vsp1_video_set_format,
 889         .vidioc_try_fmt_vid_cap_mplane  = vsp1_video_try_format,
 890         .vidioc_g_fmt_vid_out_mplane    = vsp1_video_get_format,
 891         .vidioc_s_fmt_vid_out_mplane    = vsp1_video_set_format,
 892         .vidioc_try_fmt_vid_out_mplane  = vsp1_video_try_format,
 893         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 894         .vidioc_querybuf                = vb2_ioctl_querybuf,
 895         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 896         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 897         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 898         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 899         .vidioc_streamon                = vsp1_video_streamon,
 900         .vidioc_streamoff               = vb2_ioctl_streamoff,
 901 };
 902
 903 /* -----------------------------------------------------------------------------
 904  * V4L2 File Operations
 905  */
 906
 907 static int vsp1_video_open(struct file *file)
 908 {
 909         struct vsp1_video *video = video_drvdata(file);
 910         struct v4l2_fh *vfh;
 911         int ret = 0;
 912
 913         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
 914         if (vfh == NULL)
 915                 return -ENOMEM;
 916
 917         v4l2_fh_init(vfh, &video->video);
 918         v4l2_fh_add(vfh);
 919
 920         file->private_data = vfh;
 921
 922         if (!vsp1_device_get(video->vsp1)) {
 923                 ret = -EBUSY;
 924                 v4l2_fh_del(vfh);
 925                 kfree(vfh);
 926         }
 927
 928         return ret;
 929 }
 930
 931 static int vsp1_video_release(struct file *file)
 932 {
 933         struct vsp1_video *video = video_drvdata(file);
 934         struct v4l2_fh *vfh = file->private_data;
 935
 936         mutex_lock(&video->lock);
 937         if (video->queue.owner == vfh) {
 938                 vb2_queue_release(&video->queue);
 939                 video->queue.owner = NULL;
 940         }
 941         mutex_unlock(&video->lock);
 942
 943         vsp1_device_put(video->vsp1);
 944
 945         v4l2_fh_release(file);
 946
 947         file->private_data = NULL;
 948
 949         return 0;
 950 }
 951
 952 static struct v4l2_file_operations vsp1_video_fops = {
 953         .owner = THIS_MODULE,
 954         .unlocked_ioctl = video_ioctl2,
 955         .open = vsp1_video_open,
 956         .release = vsp1_video_release,
 957         .poll = vb2_fop_poll,
 958         .mmap = vb2_fop_mmap,
 959 };
 960
 961 /* -----------------------------------------------------------------------------
 962  * Initialization and Cleanup
 963  */
 964
 965 int vsp1_video_init(struct vsp1_video *video, struct vsp1_entity *rwpf)
 966 {
 967         const char *direction;
 968         int ret;
 969
 970         switch (video->type) {
 971         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 972                 direction = "output";
 973                 video->pad.flags = MEDIA_PAD_FL_SINK;
 974                 break;
 975
 976         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 977                 direction = "input";
 978                 video->pad.flags = MEDIA_PAD_FL_SOURCE;
 979                 video->video.vfl_dir = VFL_DIR_TX;
 980                 break;
 981
 982         default:
 983                 return -EINVAL;
 984         }
 985
 986         video->rwpf = rwpf;
 987
 988         mutex_init(&video->lock);
 989         spin_lock_init(&video->irqlock);
 990         INIT_LIST_HEAD(&video->irqqueue);
 991
 992         mutex_init(&video->pipe.lock);
 993         spin_lock_init(&video->pipe.irqlock);
 994         INIT_LIST_HEAD(&video->pipe.entities);
 995         init_waitqueue_head(&video->pipe.wq);
 996         video->pipe.state = VSP1_PIPELINE_STOPPED;
 997
 998         /* Initialize the media entity... */
 999         ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1000         if (ret < 0)
1001                 return ret;
1002
1003         /* ... and the format ... */
1004         video->fmtinfo = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
1005         video->format.pixelformat = video->fmtinfo->fourcc;
1006         video->format.colorspace = V4L2_COLORSPACE_SRGB;
1007         video->format.field = V4L2_FIELD_NONE;
1008         video->format.width = VSP1_VIDEO_DEF_WIDTH;
1009         video->format.height = VSP1_VIDEO_DEF_HEIGHT;
1010         video->format.num_planes = 1;
1011         video->format.plane_fmt[0].bytesperline =
1012                 video->format.width * video->fmtinfo->bpp[0] / 8;
1013         video->format.plane_fmt[0].sizeimage =
1014                 video->format.plane_fmt[0].bytesperline * video->format.height;
1015
1016         /* ... and the video node... */
1017         video->video.v4l2_dev = &video->vsp1->v4l2_dev;
1018         video->video.fops = &vsp1_video_fops;
1019         snprintf(video->video.name, sizeof(video->video.name), "%s %s",
1020                  rwpf->subdev.name, direction);
1021         video->video.vfl_type = VFL_TYPE_GRABBER;
1022         video->video.release = video_device_release_empty;
1023         video->video.ioctl_ops = &vsp1_video_ioctl_ops;
1024
1025         video_set_drvdata(&video->video, video);
1026
1027         /* ... and the buffers queue... */
1028         video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
1029         if (IS_ERR(video->alloc_ctx))
1030                 goto error;
1031
1032         video->queue.type = video->type;
1033         video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1034         video->queue.lock = &video->lock;
1035         video->queue.drv_priv = video;
1036         video->queue.buf_struct_size = sizeof(struct vsp1_video_buffer);
1037         video->queue.ops = &vsp1_video_queue_qops;
1038         video->queue.mem_ops = &vb2_dma_contig_memops;
1039         video->queue.timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1040         ret = vb2_queue_init(&video->queue);
1041         if (ret < 0) {
1042                 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
1043                 goto error;
1044         }
1045
1046         /* ... and register the video device. */
1047         video->video.queue = &video->queue;
1048         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1049         if (ret < 0) {
1050                 dev_err(video->vsp1->dev, "failed to register video device\n");
1051                 goto error;
1052         }
1053
1054         return 0;
1055
1056 error:
1057         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1058         vsp1_video_cleanup(video);
1059         return ret;
1060 }
1061
1062 void vsp1_video_cleanup(struct vsp1_video *video)
1063 {
1064         if (video_is_registered(&video->video))
1065                 video_unregister_device(&video->video);
1066
1067         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1068         media_entity_cleanup(&video->video.entity);
1069 }