drivers/media/platform/vsp1/vsp1_video.c

   1 /*
   2  * vsp1_video.c  --  R-Car VSP1 Video Node
   3  *
   4  * Copyright (C) 2013-2014 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-core.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_video.h"
  35
  36 #define VSP1_VIDEO_DEF_FORMAT           V4L2_PIX_FMT_YUYV
  37 #define VSP1_VIDEO_DEF_WIDTH            1024
  38 #define VSP1_VIDEO_DEF_HEIGHT           768
  39
  40 #define VSP1_VIDEO_MIN_WIDTH            2U
  41 #define VSP1_VIDEO_MAX_WIDTH            8190U
  42 #define VSP1_VIDEO_MIN_HEIGHT           2U
  43 #define VSP1_VIDEO_MAX_HEIGHT           8190U
  44
  45 /* -----------------------------------------------------------------------------
  46  * Helper functions
  47  */
  48
  49 static const struct vsp1_format_info vsp1_video_formats[] = {
  50         { V4L2_PIX_FMT_RGB332, V4L2_MBUS_FMT_ARGB8888_1X32,
  51           VI6_FMT_RGB_332, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  52           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  53           1, { 8, 0, 0 }, false, false, 1, 1 },
  54         { V4L2_PIX_FMT_RGB444, V4L2_MBUS_FMT_ARGB8888_1X32,
  55           VI6_FMT_XRGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  56           VI6_RPF_DSWAP_P_WDS,
  57           1, { 16, 0, 0 }, false, false, 1, 1 },
  58         { V4L2_PIX_FMT_RGB555, V4L2_MBUS_FMT_ARGB8888_1X32,
  59           VI6_FMT_XRGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  60           VI6_RPF_DSWAP_P_WDS,
  61           1, { 16, 0, 0 }, false, false, 1, 1 },
  62         { V4L2_PIX_FMT_RGB565, V4L2_MBUS_FMT_ARGB8888_1X32,
  63           VI6_FMT_RGB_565, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  64           VI6_RPF_DSWAP_P_WDS,
  65           1, { 16, 0, 0 }, false, false, 1, 1 },
  66         { V4L2_PIX_FMT_BGR24, V4L2_MBUS_FMT_ARGB8888_1X32,
  67           VI6_FMT_BGR_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  68           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  69           1, { 24, 0, 0 }, false, false, 1, 1 },
  70         { V4L2_PIX_FMT_RGB24, V4L2_MBUS_FMT_ARGB8888_1X32,
  71           VI6_FMT_RGB_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  72           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  73           1, { 24, 0, 0 }, false, false, 1, 1 },
  74         { V4L2_PIX_FMT_BGR32, V4L2_MBUS_FMT_ARGB8888_1X32,
  75           VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
  76           1, { 32, 0, 0 }, false, false, 1, 1 },
  77         { V4L2_PIX_FMT_RGB32, V4L2_MBUS_FMT_ARGB8888_1X32,
  78           VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  79           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  80           1, { 32, 0, 0 }, false, false, 1, 1 },
  81         { V4L2_PIX_FMT_UYVY, V4L2_MBUS_FMT_AYUV8_1X32,
  82           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  83           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  84           1, { 16, 0, 0 }, false, false, 2, 1 },
  85         { V4L2_PIX_FMT_VYUY, V4L2_MBUS_FMT_AYUV8_1X32,
  86           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  87           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  88           1, { 16, 0, 0 }, false, true, 2, 1 },
  89         { V4L2_PIX_FMT_YUYV, V4L2_MBUS_FMT_AYUV8_1X32,
  90           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  91           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  92           1, { 16, 0, 0 }, true, false, 2, 1 },
  93         { V4L2_PIX_FMT_YVYU, V4L2_MBUS_FMT_AYUV8_1X32,
  94           VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  95           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
  96           1, { 16, 0, 0 }, true, true, 2, 1 },
  97         { V4L2_PIX_FMT_NV12M, V4L2_MBUS_FMT_AYUV8_1X32,
  98           VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
  99           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 100           2, { 8, 16, 0 }, false, false, 2, 2 },
 101         { V4L2_PIX_FMT_NV21M, V4L2_MBUS_FMT_AYUV8_1X32,
 102           VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 103           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 104           2, { 8, 16, 0 }, false, true, 2, 2 },
 105         { V4L2_PIX_FMT_NV16M, V4L2_MBUS_FMT_AYUV8_1X32,
 106           VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 107           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 108           2, { 8, 16, 0 }, false, false, 2, 1 },
 109         { V4L2_PIX_FMT_NV61M, V4L2_MBUS_FMT_AYUV8_1X32,
 110           VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 111           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 112           2, { 8, 16, 0 }, false, true, 2, 1 },
 113         { V4L2_PIX_FMT_YUV420M, V4L2_MBUS_FMT_AYUV8_1X32,
 114           VI6_FMT_Y_U_V_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
 115           VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
 116           3, { 8, 8, 8 }, false, false, 2, 2 },
 117 };
 118
 119 /*
 120  * vsp1_get_format_info - Retrieve format information for a 4CC
 121  * @fourcc: the format 4CC
 122  *
 123  * Return a pointer to the format information structure corresponding to the
 124  * given V4L2 format 4CC, or NULL if no corresponding format can be found.
 125  */
 126 static const struct vsp1_format_info *vsp1_get_format_info(u32 fourcc)
 127 {
 128         unsigned int i;
 129
 130         for (i = 0; i < ARRAY_SIZE(vsp1_video_formats); ++i) {
 131                 const struct vsp1_format_info *info = &vsp1_video_formats[i];
 132
 133                 if (info->fourcc == fourcc)
 134                         return info;
 135         }
 136
 137         return NULL;
 138 }
 139
 140
 141 static struct v4l2_subdev *
 142 vsp1_video_remote_subdev(struct media_pad *local, u32 *pad)
 143 {
 144         struct media_pad *remote;
 145
 146         remote = media_entity_remote_pad(local);
 147         if (remote == NULL ||
 148             media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 149                 return NULL;
 150
 151         if (pad)
 152                 *pad = remote->index;
 153
 154         return media_entity_to_v4l2_subdev(remote->entity);
 155 }
 156
 157 static int vsp1_video_verify_format(struct vsp1_video *video)
 158 {
 159         struct v4l2_subdev_format fmt;
 160         struct v4l2_subdev *subdev;
 161         int ret;
 162
 163         subdev = vsp1_video_remote_subdev(&video->pad, &fmt.pad);
 164         if (subdev == NULL)
 165                 return -EINVAL;
 166
 167         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 168         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 169         if (ret < 0)
 170                 return ret == -ENOIOCTLCMD ? -EINVAL : ret;
 171
 172         if (video->fmtinfo->mbus != fmt.format.code ||
 173             video->format.height != fmt.format.height ||
 174             video->format.width != fmt.format.width)
 175                 return -EINVAL;
 176
 177         return 0;
 178 }
 179
 180 static int __vsp1_video_try_format(struct vsp1_video *video,
 181                                    struct v4l2_pix_format_mplane *pix,
 182                                    const struct vsp1_format_info **fmtinfo)
 183 {
 184         const struct vsp1_format_info *info;
 185         unsigned int width = pix->width;
 186         unsigned int height = pix->height;
 187         unsigned int i;
 188
 189         /* Retrieve format information and select the default format if the
 190          * requested format isn't supported.
 191          */
 192         info = vsp1_get_format_info(pix->pixelformat);
 193         if (info == NULL)
 194                 info = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
 195
 196         pix->pixelformat = info->fourcc;
 197         pix->colorspace = V4L2_COLORSPACE_SRGB;
 198         pix->field = V4L2_FIELD_NONE;
 199         memset(pix->reserved, 0, sizeof(pix->reserved));
 200
 201         /* Align the width and height for YUV 4:2:2 and 4:2:0 formats. */
 202         width = round_down(width, info->hsub);
 203         height = round_down(height, info->vsub);
 204
 205         /* Clamp the width and height. */
 206         pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH);
 207         pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT,
 208                             VSP1_VIDEO_MAX_HEIGHT);
 209
 210         /* Compute and clamp the stride and image size. While not documented in
 211          * the datasheet, strides not aligned to a multiple of 128 bytes result
 212          * in image corruption.
 213          */
 214         for (i = 0; i < max(info->planes, 2U); ++i) {
 215                 unsigned int hsub = i > 0 ? info->hsub : 1;
 216                 unsigned int vsub = i > 0 ? info->vsub : 1;
 217                 unsigned int align = 128;
 218                 unsigned int bpl;
 219
 220                 bpl = clamp_t(unsigned int, pix->plane_fmt[i].bytesperline,
 221                               pix->width / hsub * info->bpp[i] / 8,
 222                               round_down(65535U, align));
 223
 224                 pix->plane_fmt[i].bytesperline = round_up(bpl, align);
 225                 pix->plane_fmt[i].sizeimage = pix->plane_fmt[i].bytesperline
 226                                             * pix->height / vsub;
 227         }
 228
 229         if (info->planes == 3) {
 230                 /* The second and third planes must have the same stride. */
 231                 pix->plane_fmt[2].bytesperline = pix->plane_fmt[1].bytesperline;
 232                 pix->plane_fmt[2].sizeimage = pix->plane_fmt[1].sizeimage;
 233         }
 234
 235         pix->num_planes = info->planes;
 236
 237         if (fmtinfo)
 238                 *fmtinfo = info;
 239
 240         return 0;
 241 }
 242
 243 static bool
 244 vsp1_video_format_adjust(struct vsp1_video *video,
 245                          const struct v4l2_pix_format_mplane *format,
 246                          struct v4l2_pix_format_mplane *adjust)
 247 {
 248         unsigned int i;
 249
 250         *adjust = *format;
 251         __vsp1_video_try_format(video, adjust, NULL);
 252
 253         if (format->width != adjust->width ||
 254             format->height != adjust->height ||
 255             format->pixelformat != adjust->pixelformat ||
 256             format->num_planes != adjust->num_planes)
 257                 return false;
 258
 259         for (i = 0; i < format->num_planes; ++i) {
 260                 if (format->plane_fmt[i].bytesperline !=
 261                     adjust->plane_fmt[i].bytesperline)
 262                         return false;
 263
 264                 adjust->plane_fmt[i].sizeimage =
 265                         max(adjust->plane_fmt[i].sizeimage,
 266                             format->plane_fmt[i].sizeimage);
 267         }
 268
 269         return true;
 270 }
 271
 272 /* -----------------------------------------------------------------------------
 273  * Pipeline Management
 274  */
 275
 276 static int vsp1_pipeline_validate_branch(struct vsp1_rwpf *input,
 277                                          struct vsp1_rwpf *output)
 278 {
 279         struct vsp1_entity *entity;
 280         unsigned int entities = 0;
 281         struct media_pad *pad;
 282         bool uds_found = false;
 283
 284         input->location.left = 0;
 285         input->location.top = 0;
 286
 287         pad = media_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
 288
 289         while (1) {
 290                 if (pad == NULL)
 291                         return -EPIPE;
 292
 293                 /* We've reached a video node, that shouldn't have happened. */
 294                 if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 295                         return -EPIPE;
 296
 297                 entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
 298
 299                 /* A BRU is present in the pipeline, store the compose rectangle
 300                  * location in the input RPF for use when configuring the RPF.
 301                  */
 302                 if (entity->type == VSP1_ENTITY_BRU) {
 303                         struct vsp1_bru *bru = to_bru(&entity->subdev);
 304                         struct v4l2_rect *rect = &bru->compose[pad->index];
 305
 306                         input->location.left = rect->left;
 307                         input->location.top = rect->top;
 308                 }
 309
 310                 /* We've reached the WPF, we're done. */
 311                 if (entity->type == VSP1_ENTITY_WPF)
 312                         break;
 313
 314                 /* Ensure the branch has no loop. */
 315                 if (entities & (1 << entity->subdev.entity.id))
 316                         return -EPIPE;
 317
 318                 entities |= 1 << entity->subdev.entity.id;
 319
 320                 /* UDS can't be chained. */
 321                 if (entity->type == VSP1_ENTITY_UDS) {
 322                         if (uds_found)
 323                                 return -EPIPE;
 324                         uds_found = true;
 325                 }
 326
 327                 /* Follow the source link. The link setup operations ensure
 328                  * that the output fan-out can't be more than one, there is thus
 329                  * no need to verify here that only a single source link is
 330                  * activated.
 331                  */
 332                 pad = &entity->pads[entity->source_pad];
 333                 pad = media_entity_remote_pad(pad);
 334         }
 335
 336         /* The last entity must be the output WPF. */
 337         if (entity != &output->entity)
 338                 return -EPIPE;
 339
 340         return 0;
 341 }
 342
 343 static int vsp1_pipeline_validate(struct vsp1_pipeline *pipe,
 344                                   struct vsp1_video *video)
 345 {
 346         struct media_entity_graph graph;
 347         struct media_entity *entity = &video->video.entity;
 348         struct media_device *mdev = entity->parent;
 349         unsigned int i;
 350         int ret;
 351
 352         mutex_lock(&mdev->graph_mutex);
 353
 354         /* Walk the graph to locate the entities and video nodes. */
 355         media_entity_graph_walk_start(&graph, entity);
 356
 357         while ((entity = media_entity_graph_walk_next(&graph))) {
 358                 struct v4l2_subdev *subdev;
 359                 struct vsp1_rwpf *rwpf;
 360                 struct vsp1_entity *e;
 361
 362                 if (media_entity_type(entity) != MEDIA_ENT_T_V4L2_SUBDEV) {
 363                         pipe->num_video++;
 364                         continue;
 365                 }
 366
 367                 subdev = media_entity_to_v4l2_subdev(entity);
 368                 e = to_vsp1_entity(subdev);
 369                 list_add_tail(&e->list_pipe, &pipe->entities);
 370
 371                 if (e->type == VSP1_ENTITY_RPF) {
 372                         rwpf = to_rwpf(subdev);
 373                         pipe->inputs[pipe->num_inputs++] = rwpf;
 374                         rwpf->video.pipe_index = pipe->num_inputs;
 375                 } else if (e->type == VSP1_ENTITY_WPF) {
 376                         rwpf = to_rwpf(subdev);
 377                         pipe->output = to_rwpf(subdev);
 378                         rwpf->video.pipe_index = 0;
 379                 } else if (e->type == VSP1_ENTITY_LIF) {
 380                         pipe->lif = e;
 381                 } else if (e->type == VSP1_ENTITY_BRU) {
 382                         pipe->bru = e;
 383                 }
 384         }
 385
 386         mutex_unlock(&mdev->graph_mutex);
 387
 388         /* We need one output and at least one input. */
 389         if (pipe->num_inputs == 0 || !pipe->output) {
 390                 ret = -EPIPE;
 391                 goto error;
 392         }
 393
 394         /* Follow links downstream for each input and make sure the graph
 395          * contains no loop and that all branches end at the output WPF.
 396          */
 397         for (i = 0; i < pipe->num_inputs; ++i) {
 398                 ret = vsp1_pipeline_validate_branch(pipe->inputs[i],
 399                                                     pipe->output);
 400                 if (ret < 0)
 401                         goto error;
 402         }
 403
 404         return 0;
 405
 406 error:
 407         INIT_LIST_HEAD(&pipe->entities);
 408         pipe->buffers_ready = 0;
 409         pipe->num_video = 0;
 410         pipe->num_inputs = 0;
 411         pipe->output = NULL;
 412         pipe->bru = NULL;
 413         pipe->lif = NULL;
 414         return ret;
 415 }
 416
 417 static int vsp1_pipeline_init(struct vsp1_pipeline *pipe,
 418                               struct vsp1_video *video)
 419 {
 420         int ret;
 421
 422         mutex_lock(&pipe->lock);
 423
 424         /* If we're the first user validate and initialize the pipeline. */
 425         if (pipe->use_count == 0) {
 426                 ret = vsp1_pipeline_validate(pipe, video);
 427                 if (ret < 0)
 428                         goto done;
 429         }
 430
 431         pipe->use_count++;
 432         ret = 0;
 433
 434 done:
 435         mutex_unlock(&pipe->lock);
 436         return ret;
 437 }
 438
 439 static void vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
 440 {
 441         mutex_lock(&pipe->lock);
 442
 443         /* If we're the last user clean up the pipeline. */
 444         if (--pipe->use_count == 0) {
 445                 INIT_LIST_HEAD(&pipe->entities);
 446                 pipe->state = VSP1_PIPELINE_STOPPED;
 447                 pipe->buffers_ready = 0;
 448                 pipe->num_video = 0;
 449                 pipe->num_inputs = 0;
 450                 pipe->output = NULL;
 451                 pipe->bru = NULL;
 452                 pipe->lif = NULL;
 453         }
 454
 455         mutex_unlock(&pipe->lock);
 456 }
 457
 458 static void vsp1_pipeline_run(struct vsp1_pipeline *pipe)
 459 {
 460         struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 461
 462         vsp1_write(vsp1, VI6_CMD(pipe->output->entity.index), VI6_CMD_STRCMD);
 463         pipe->state = VSP1_PIPELINE_RUNNING;
 464         pipe->buffers_ready = 0;
 465 }
 466
 467 static int vsp1_pipeline_stop(struct vsp1_pipeline *pipe)
 468 {
 469         struct vsp1_entity *entity;
 470         unsigned long flags;
 471         int ret;
 472
 473         spin_lock_irqsave(&pipe->irqlock, flags);
 474         pipe->state = VSP1_PIPELINE_STOPPING;
 475         spin_unlock_irqrestore(&pipe->irqlock, flags);
 476
 477         ret = wait_event_timeout(pipe->wq, pipe->state == VSP1_PIPELINE_STOPPED,
 478                                  msecs_to_jiffies(500));
 479         ret = ret == 0 ? -ETIMEDOUT : 0;
 480
 481         list_for_each_entry(entity, &pipe->entities, list_pipe) {
 482                 if (entity->route && entity->route->reg)
 483                         vsp1_write(entity->vsp1, entity->route->reg,
 484                                    VI6_DPR_NODE_UNUSED);
 485
 486                 v4l2_subdev_call(&entity->subdev, video, s_stream, 0);
 487         }
 488
 489         return ret;
 490 }
 491
 492 static bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe)
 493 {
 494         unsigned int mask;
 495
 496         mask = ((1 << pipe->num_inputs) - 1) << 1;
 497         if (!pipe->lif)
 498                 mask |= 1 << 0;
 499
 500         return pipe->buffers_ready == mask;
 501 }
 502
 503 /*
 504  * vsp1_video_complete_buffer - Complete the current buffer
 505  * @video: the video node
 506  *
 507  * This function completes the current buffer by filling its sequence number,
 508  * time stamp and payload size, and hands it back to the videobuf core.
 509  *
 510  * When operating in DU output mode (deep pipeline to the DU through the LIF),
 511  * the VSP1 needs to constantly supply frames to the display. In that case, if
 512  * no other buffer is queued, reuse the one that has just been processed instead
 513  * of handing it back to the videobuf core.
 514  *
 515  * Return the next queued buffer or NULL if the queue is empty.
 516  */
 517 static struct vsp1_video_buffer *
 518 vsp1_video_complete_buffer(struct vsp1_video *video)
 519 {
 520         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 521         struct vsp1_video_buffer *next = NULL;
 522         struct vsp1_video_buffer *done;
 523         unsigned long flags;
 524         unsigned int i;
 525
 526         spin_lock_irqsave(&video->irqlock, flags);
 527
 528         if (list_empty(&video->irqqueue)) {
 529                 spin_unlock_irqrestore(&video->irqlock, flags);
 530                 return NULL;
 531         }
 532
 533         done = list_first_entry(&video->irqqueue,
 534                                 struct vsp1_video_buffer, queue);
 535
 536         /* In DU output mode reuse the buffer if the list is singular. */
 537         if (pipe->lif && list_is_singular(&video->irqqueue)) {
 538                 spin_unlock_irqrestore(&video->irqlock, flags);
 539                 return done;
 540         }
 541
 542         list_del(&done->queue);
 543
 544         if (!list_empty(&video->irqqueue))
 545                 next = list_first_entry(&video->irqqueue,
 546                                         struct vsp1_video_buffer, queue);
 547
 548         spin_unlock_irqrestore(&video->irqlock, flags);
 549
 550         done->buf.v4l2_buf.sequence = video->sequence++;
 551         v4l2_get_timestamp(&done->buf.v4l2_buf.timestamp);
 552         for (i = 0; i < done->buf.num_planes; ++i)
 553                 vb2_set_plane_payload(&done->buf, i, done->length[i]);
 554         vb2_buffer_done(&done->buf, VB2_BUF_STATE_DONE);
 555
 556         return next;
 557 }
 558
 559 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
 560                                  struct vsp1_video *video)
 561 {
 562         struct vsp1_video_buffer *buf;
 563         unsigned long flags;
 564
 565         buf = vsp1_video_complete_buffer(video);
 566         if (buf == NULL)
 567                 return;
 568
 569         spin_lock_irqsave(&pipe->irqlock, flags);
 570
 571         video->ops->queue(video, buf);
 572         pipe->buffers_ready |= 1 << video->pipe_index;
 573
 574         spin_unlock_irqrestore(&pipe->irqlock, flags);
 575 }
 576
 577 void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
 578 {
 579         unsigned long flags;
 580         unsigned int i;
 581
 582         if (pipe == NULL)
 583                 return;
 584
 585         /* Complete buffers on all video nodes. */
 586         for (i = 0; i < pipe->num_inputs; ++i)
 587                 vsp1_video_frame_end(pipe, &pipe->inputs[i]->video);
 588
 589         if (!pipe->lif)
 590                 vsp1_video_frame_end(pipe, &pipe->output->video);
 591
 592         spin_lock_irqsave(&pipe->irqlock, flags);
 593
 594         /* If a stop has been requested, mark the pipeline as stopped and
 595          * return.
 596          */
 597         if (pipe->state == VSP1_PIPELINE_STOPPING) {
 598                 pipe->state = VSP1_PIPELINE_STOPPED;
 599                 wake_up(&pipe->wq);
 600                 goto done;
 601         }
 602
 603         /* Restart the pipeline if ready. */
 604         if (vsp1_pipeline_ready(pipe))
 605                 vsp1_pipeline_run(pipe);
 606
 607 done:
 608         spin_unlock_irqrestore(&pipe->irqlock, flags);
 609 }
 610
 611 /* -----------------------------------------------------------------------------
 612  * videobuf2 Queue Operations
 613  */
 614
 615 static int
 616 vsp1_video_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 617                      unsigned int *nbuffers, unsigned int *nplanes,
 618                      unsigned int sizes[], void *alloc_ctxs[])
 619 {
 620         struct vsp1_video *video = vb2_get_drv_priv(vq);
 621         const struct v4l2_pix_format_mplane *format;
 622         struct v4l2_pix_format_mplane pix_mp;
 623         unsigned int i;
 624
 625         if (fmt) {
 626                 /* Make sure the format is valid and adjust the sizeimage field
 627                  * if needed.
 628                  */
 629                 if (!vsp1_video_format_adjust(video, &fmt->fmt.pix_mp, &pix_mp))
 630                         return -EINVAL;
 631
 632                 format = &pix_mp;
 633         } else {
 634                 format = &video->format;
 635         }
 636
 637         *nplanes = format->num_planes;
 638
 639         for (i = 0; i < format->num_planes; ++i) {
 640                 sizes[i] = format->plane_fmt[i].sizeimage;
 641                 alloc_ctxs[i] = video->alloc_ctx;
 642         }
 643
 644         return 0;
 645 }
 646
 647 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
 648 {
 649         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 650         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
 651         const struct v4l2_pix_format_mplane *format = &video->format;
 652         unsigned int i;
 653
 654         if (vb->num_planes < format->num_planes)
 655                 return -EINVAL;
 656
 657         for (i = 0; i < vb->num_planes; ++i) {
 658                 buf->addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 659                 buf->length[i] = vb2_plane_size(vb, i);
 660
 661                 if (buf->length[i] < format->plane_fmt[i].sizeimage)
 662                         return -EINVAL;
 663         }
 664
 665         return 0;
 666 }
 667
 668 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
 669 {
 670         struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
 671         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 672         struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb);
 673         unsigned long flags;
 674         bool empty;
 675
 676         spin_lock_irqsave(&video->irqlock, flags);
 677         empty = list_empty(&video->irqqueue);
 678         list_add_tail(&buf->queue, &video->irqqueue);
 679         spin_unlock_irqrestore(&video->irqlock, flags);
 680
 681         if (!empty)
 682                 return;
 683
 684         spin_lock_irqsave(&pipe->irqlock, flags);
 685
 686         video->ops->queue(video, buf);
 687         pipe->buffers_ready |= 1 << video->pipe_index;
 688
 689         if (vb2_is_streaming(&video->queue) &&
 690             vsp1_pipeline_ready(pipe))
 691                 vsp1_pipeline_run(pipe);
 692
 693         spin_unlock_irqrestore(&pipe->irqlock, flags);
 694 }
 695
 696 static void vsp1_entity_route_setup(struct vsp1_entity *source)
 697 {
 698         struct vsp1_entity *sink;
 699
 700         if (source->route->reg == 0)
 701                 return;
 702
 703         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
 704         vsp1_write(source->vsp1, source->route->reg,
 705                    sink->route->inputs[source->sink_pad]);
 706 }
 707
 708 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 709 {
 710         struct vsp1_video *video = vb2_get_drv_priv(vq);
 711         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 712         struct vsp1_entity *entity;
 713         unsigned long flags;
 714         int ret;
 715
 716         mutex_lock(&pipe->lock);
 717         if (pipe->stream_count == pipe->num_video - 1) {
 718                 list_for_each_entry(entity, &pipe->entities, list_pipe) {
 719                         vsp1_entity_route_setup(entity);
 720
 721                         ret = v4l2_subdev_call(&entity->subdev, video,
 722                                                s_stream, 1);
 723                         if (ret < 0) {
 724                                 mutex_unlock(&pipe->lock);
 725                                 return ret;
 726                         }
 727                 }
 728         }
 729
 730         pipe->stream_count++;
 731         mutex_unlock(&pipe->lock);
 732
 733         spin_lock_irqsave(&pipe->irqlock, flags);
 734         if (vsp1_pipeline_ready(pipe))
 735                 vsp1_pipeline_run(pipe);
 736         spin_unlock_irqrestore(&pipe->irqlock, flags);
 737
 738         return 0;
 739 }
 740
 741 static int vsp1_video_stop_streaming(struct vb2_queue *vq)
 742 {
 743         struct vsp1_video *video = vb2_get_drv_priv(vq);
 744         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
 745         unsigned long flags;
 746         int ret;
 747
 748         mutex_lock(&pipe->lock);
 749         if (--pipe->stream_count == 0) {
 750                 /* Stop the pipeline. */
 751                 ret = vsp1_pipeline_stop(pipe);
 752                 if (ret == -ETIMEDOUT)
 753                         dev_err(video->vsp1->dev, "pipeline stop timeout\n");
 754         }
 755         mutex_unlock(&pipe->lock);
 756
 757         vsp1_pipeline_cleanup(pipe);
 758         media_entity_pipeline_stop(&video->video.entity);
 759
 760         /* Remove all buffers from the IRQ queue. */
 761         spin_lock_irqsave(&video->irqlock, flags);
 762         INIT_LIST_HEAD(&video->irqqueue);
 763         spin_unlock_irqrestore(&video->irqlock, flags);
 764
 765         return 0;
 766 }
 767
 768 static struct vb2_ops vsp1_video_queue_qops = {
 769         .queue_setup = vsp1_video_queue_setup,
 770         .buf_prepare = vsp1_video_buffer_prepare,
 771         .buf_queue = vsp1_video_buffer_queue,
 772         .wait_prepare = vb2_ops_wait_prepare,
 773         .wait_finish = vb2_ops_wait_finish,
 774         .start_streaming = vsp1_video_start_streaming,
 775         .stop_streaming = vsp1_video_stop_streaming,
 776 };
 777
 778 /* -----------------------------------------------------------------------------
 779  * V4L2 ioctls
 780  */
 781
 782 static int
 783 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 784 {
 785         struct v4l2_fh *vfh = file->private_data;
 786         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 787
 788         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
 789                           | V4L2_CAP_VIDEO_CAPTURE_MPLANE
 790                           | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
 791
 792         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 793                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
 794                                  | V4L2_CAP_STREAMING;
 795         else
 796                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
 797                                  | V4L2_CAP_STREAMING;
 798
 799         strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
 800         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 801         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 802                  dev_name(video->vsp1->dev));
 803
 804         return 0;
 805 }
 806
 807 static int
 808 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 809 {
 810         struct v4l2_fh *vfh = file->private_data;
 811         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 812
 813         if (format->type != video->queue.type)
 814                 return -EINVAL;
 815
 816         mutex_lock(&video->lock);
 817         format->fmt.pix_mp = video->format;
 818         mutex_unlock(&video->lock);
 819
 820         return 0;
 821 }
 822
 823 static int
 824 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 825 {
 826         struct v4l2_fh *vfh = file->private_data;
 827         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 828
 829         if (format->type != video->queue.type)
 830                 return -EINVAL;
 831
 832         return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
 833 }
 834
 835 static int
 836 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 837 {
 838         struct v4l2_fh *vfh = file->private_data;
 839         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 840         const struct vsp1_format_info *info;
 841         int ret;
 842
 843         if (format->type != video->queue.type)
 844                 return -EINVAL;
 845
 846         ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
 847         if (ret < 0)
 848                 return ret;
 849
 850         mutex_lock(&video->lock);
 851
 852         if (vb2_is_busy(&video->queue)) {
 853                 ret = -EBUSY;
 854                 goto done;
 855         }
 856
 857         video->format = format->fmt.pix_mp;
 858         video->fmtinfo = info;
 859
 860 done:
 861         mutex_unlock(&video->lock);
 862         return ret;
 863 }
 864
 865 static int
 866 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 867 {
 868         struct v4l2_fh *vfh = file->private_data;
 869         struct vsp1_video *video = to_vsp1_video(vfh->vdev);
 870         struct vsp1_pipeline *pipe;
 871         int ret;
 872
 873         if (video->queue.owner && video->queue.owner != file->private_data)
 874                 return -EBUSY;
 875
 876         video->sequence = 0;
 877
 878         /* Start streaming on the pipeline. No link touching an entity in the
 879          * pipeline can be activated or deactivated once streaming is started.
 880          *
 881          * Use the VSP1 pipeline object embedded in the first video object that
 882          * starts streaming.
 883          */
 884         pipe = video->video.entity.pipe
 885              ? to_vsp1_pipeline(&video->video.entity) : &video->pipe;
 886
 887         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
 888         if (ret < 0)
 889                 return ret;
 890
 891         /* Verify that the configured format matches the output of the connected
 892          * subdev.
 893          */
 894         ret = vsp1_video_verify_format(video);
 895         if (ret < 0)
 896                 goto err_stop;
 897
 898         ret = vsp1_pipeline_init(pipe, video);
 899         if (ret < 0)
 900                 goto err_stop;
 901
 902         /* Start the queue. */
 903         ret = vb2_streamon(&video->queue, type);
 904         if (ret < 0)
 905                 goto err_cleanup;
 906
 907         return 0;
 908
 909 err_cleanup:
 910         vsp1_pipeline_cleanup(pipe);
 911 err_stop:
 912         media_entity_pipeline_stop(&video->video.entity);
 913         return ret;
 914 }
 915
 916 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
 917         .vidioc_querycap                = vsp1_video_querycap,
 918         .vidioc_g_fmt_vid_cap_mplane    = vsp1_video_get_format,
 919         .vidioc_s_fmt_vid_cap_mplane    = vsp1_video_set_format,
 920         .vidioc_try_fmt_vid_cap_mplane  = vsp1_video_try_format,
 921         .vidioc_g_fmt_vid_out_mplane    = vsp1_video_get_format,
 922         .vidioc_s_fmt_vid_out_mplane    = vsp1_video_set_format,
 923         .vidioc_try_fmt_vid_out_mplane  = vsp1_video_try_format,
 924         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 925         .vidioc_querybuf                = vb2_ioctl_querybuf,
 926         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 927         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 928         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 929         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 930         .vidioc_streamon                = vsp1_video_streamon,
 931         .vidioc_streamoff               = vb2_ioctl_streamoff,
 932 };
 933
 934 /* -----------------------------------------------------------------------------
 935  * V4L2 File Operations
 936  */
 937
 938 static int vsp1_video_open(struct file *file)
 939 {
 940         struct vsp1_video *video = video_drvdata(file);
 941         struct v4l2_fh *vfh;
 942         int ret = 0;
 943
 944         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
 945         if (vfh == NULL)
 946                 return -ENOMEM;
 947
 948         v4l2_fh_init(vfh, &video->video);
 949         v4l2_fh_add(vfh);
 950
 951         file->private_data = vfh;
 952
 953         if (!vsp1_device_get(video->vsp1)) {
 954                 ret = -EBUSY;
 955                 v4l2_fh_del(vfh);
 956                 kfree(vfh);
 957         }
 958
 959         return ret;
 960 }
 961
 962 static int vsp1_video_release(struct file *file)
 963 {
 964         struct vsp1_video *video = video_drvdata(file);
 965         struct v4l2_fh *vfh = file->private_data;
 966
 967         mutex_lock(&video->lock);
 968         if (video->queue.owner == vfh) {
 969                 vb2_queue_release(&video->queue);
 970                 video->queue.owner = NULL;
 971         }
 972         mutex_unlock(&video->lock);
 973
 974         vsp1_device_put(video->vsp1);
 975
 976         v4l2_fh_release(file);
 977
 978         file->private_data = NULL;
 979
 980         return 0;
 981 }
 982
 983 static struct v4l2_file_operations vsp1_video_fops = {
 984         .owner = THIS_MODULE,
 985         .unlocked_ioctl = video_ioctl2,
 986         .open = vsp1_video_open,
 987         .release = vsp1_video_release,
 988         .poll = vb2_fop_poll,
 989         .mmap = vb2_fop_mmap,
 990 };
 991
 992 /* -----------------------------------------------------------------------------
 993  * Initialization and Cleanup
 994  */
 995
 996 int vsp1_video_init(struct vsp1_video *video, struct vsp1_entity *rwpf)
 997 {
 998         const char *direction;
 999         int ret;
1000
1001         switch (video->type) {
1002         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1003                 direction = "output";
1004                 video->pad.flags = MEDIA_PAD_FL_SINK;
1005                 break;
1006
1007         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1008                 direction = "input";
1009                 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1010                 video->video.vfl_dir = VFL_DIR_TX;
1011                 break;
1012
1013         default:
1014                 return -EINVAL;
1015         }
1016
1017         video->rwpf = rwpf;
1018
1019         mutex_init(&video->lock);
1020         spin_lock_init(&video->irqlock);
1021         INIT_LIST_HEAD(&video->irqqueue);
1022
1023         mutex_init(&video->pipe.lock);
1024         spin_lock_init(&video->pipe.irqlock);
1025         INIT_LIST_HEAD(&video->pipe.entities);
1026         init_waitqueue_head(&video->pipe.wq);
1027         video->pipe.state = VSP1_PIPELINE_STOPPED;
1028
1029         /* Initialize the media entity... */
1030         ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1031         if (ret < 0)
1032                 return ret;
1033
1034         /* ... and the format ... */
1035         video->fmtinfo = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
1036         video->format.pixelformat = video->fmtinfo->fourcc;
1037         video->format.colorspace = V4L2_COLORSPACE_SRGB;
1038         video->format.field = V4L2_FIELD_NONE;
1039         video->format.width = VSP1_VIDEO_DEF_WIDTH;
1040         video->format.height = VSP1_VIDEO_DEF_HEIGHT;
1041         video->format.num_planes = 1;
1042         video->format.plane_fmt[0].bytesperline =
1043                 video->format.width * video->fmtinfo->bpp[0] / 8;
1044         video->format.plane_fmt[0].sizeimage =
1045                 video->format.plane_fmt[0].bytesperline * video->format.height;
1046
1047         /* ... and the video node... */
1048         video->video.v4l2_dev = &video->vsp1->v4l2_dev;
1049         video->video.fops = &vsp1_video_fops;
1050         snprintf(video->video.name, sizeof(video->video.name), "%s %s",
1051                  rwpf->subdev.name, direction);
1052         video->video.vfl_type = VFL_TYPE_GRABBER;
1053         video->video.release = video_device_release_empty;
1054         video->video.ioctl_ops = &vsp1_video_ioctl_ops;
1055
1056         video_set_drvdata(&video->video, video);
1057
1058         /* ... and the buffers queue... */
1059         video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
1060         if (IS_ERR(video->alloc_ctx)) {
1061                 ret = PTR_ERR(video->alloc_ctx);
1062                 goto error;
1063         }
1064
1065         video->queue.type = video->type;
1066         video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1067         video->queue.lock = &video->lock;
1068         video->queue.drv_priv = video;
1069         video->queue.buf_struct_size = sizeof(struct vsp1_video_buffer);
1070         video->queue.ops = &vsp1_video_queue_qops;
1071         video->queue.mem_ops = &vb2_dma_contig_memops;
1072         video->queue.timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1073         ret = vb2_queue_init(&video->queue);
1074         if (ret < 0) {
1075                 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
1076                 goto error;
1077         }
1078
1079         /* ... and register the video device. */
1080         video->video.queue = &video->queue;
1081         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1082         if (ret < 0) {
1083                 dev_err(video->vsp1->dev, "failed to register video device\n");
1084                 goto error;
1085         }
1086
1087         return 0;
1088
1089 error:
1090         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1091         vsp1_video_cleanup(video);
1092         return ret;
1093 }
1094
1095 void vsp1_video_cleanup(struct vsp1_video *video)
1096 {
1097         if (video_is_registered(&video->video))
1098                 video_unregister_device(&video->video);
1099
1100         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1101         media_entity_cleanup(&video->video.entity);
1102 }