drivers/media/test-drivers/vicodec/vicodec-core.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * A virtual codec example device.
   4  *
   5  * Copyright 2018 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
   6  *
   7  * This is a virtual codec device driver for testing the codec framework.
   8  * It simulates a device that uses memory buffers for both source and
   9  * destination and encodes or decodes the data.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/delay.h>
  14 #include <linux/fs.h>
  15 #include <linux/sched.h>
  16 #include <linux/slab.h>
  17
  18 #include <linux/platform_device.h>
  19 #include <media/v4l2-mem2mem.h>
  20 #include <media/v4l2-device.h>
  21 #include <media/v4l2-ioctl.h>
  22 #include <media/v4l2-ctrls.h>
  23 #include <media/v4l2-event.h>
  24 #include <media/videobuf2-vmalloc.h>
  25
  26 #include "codec-v4l2-fwht.h"
  27
  28 MODULE_DESCRIPTION("Virtual codec device");
  29 MODULE_AUTHOR("Hans Verkuil <hans.verkuil@cisco.com>");
  30 MODULE_LICENSE("GPL v2");
  31
  32 static bool multiplanar;
  33 module_param(multiplanar, bool, 0444);
  34 MODULE_PARM_DESC(multiplanar,
  35                  " use multi-planar API instead of single-planar API");
  36
  37 static unsigned int debug;
  38 module_param(debug, uint, 0644);
  39 MODULE_PARM_DESC(debug, " activates debug info");
  40
  41 #define VICODEC_NAME            "vicodec"
  42 #define MAX_WIDTH               4096U
  43 #define MIN_WIDTH               640U
  44 #define MAX_HEIGHT              2160U
  45 #define MIN_HEIGHT              360U
  46
  47 #define dprintk(dev, fmt, arg...) \
  48         v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
  49
  50
  51 struct pixfmt_info {
  52         u32 id;
  53         unsigned int bytesperline_mult;
  54         unsigned int sizeimage_mult;
  55         unsigned int sizeimage_div;
  56         unsigned int luma_step;
  57         unsigned int chroma_step;
  58         /* Chroma plane subsampling */
  59         unsigned int width_div;
  60         unsigned int height_div;
  61 };
  62
  63 static const struct v4l2_fwht_pixfmt_info pixfmt_fwht = {
  64         V4L2_PIX_FMT_FWHT, 0, 3, 1, 1, 1, 1, 1, 0, 1
  65 };
  66
  67 static const struct v4l2_fwht_pixfmt_info pixfmt_stateless_fwht = {
  68         V4L2_PIX_FMT_FWHT_STATELESS, 0, 3, 1, 1, 1, 1, 1, 0, 1
  69 };
  70
  71 static void vicodec_dev_release(struct device *dev)
  72 {
  73 }
  74
  75 static struct platform_device vicodec_pdev = {
  76         .name           = VICODEC_NAME,
  77         .dev.release    = vicodec_dev_release,
  78 };
  79
  80 /* Per-queue, driver-specific private data */
  81 struct vicodec_q_data {
  82         unsigned int            coded_width;
  83         unsigned int            coded_height;
  84         unsigned int            visible_width;
  85         unsigned int            visible_height;
  86         unsigned int            sizeimage;
  87         unsigned int            vb2_sizeimage;
  88         unsigned int            sequence;
  89         const struct v4l2_fwht_pixfmt_info *info;
  90 };
  91
  92 enum {
  93         V4L2_M2M_SRC = 0,
  94         V4L2_M2M_DST = 1,
  95 };
  96
  97 struct vicodec_dev_instance {
  98         struct video_device     vfd;
  99         struct mutex            mutex;
 100         spinlock_t              lock;
 101         struct v4l2_m2m_dev     *m2m_dev;
 102 };
 103
 104 struct vicodec_dev {
 105         struct v4l2_device      v4l2_dev;
 106         struct vicodec_dev_instance stateful_enc;
 107         struct vicodec_dev_instance stateful_dec;
 108         struct vicodec_dev_instance stateless_dec;
 109 #ifdef CONFIG_MEDIA_CONTROLLER
 110         struct media_device     mdev;
 111 #endif
 112
 113 };
 114
 115 struct vicodec_ctx {
 116         struct v4l2_fh          fh;
 117         struct vicodec_dev      *dev;
 118         bool                    is_enc;
 119         bool                    is_stateless;
 120         spinlock_t              *lock;
 121
 122         struct v4l2_ctrl_handler hdl;
 123
 124         /* Source and destination queue data */
 125         struct vicodec_q_data   q_data[2];
 126         struct v4l2_fwht_state  state;
 127
 128         u32                     cur_buf_offset;
 129         u32                     comp_max_size;
 130         u32                     comp_size;
 131         u32                     header_size;
 132         u32                     comp_magic_cnt;
 133         bool                    comp_has_frame;
 134         bool                    comp_has_next_frame;
 135         bool                    first_source_change_sent;
 136         bool                    source_changed;
 137 };
 138
 139 static const struct v4l2_event vicodec_eos_event = {
 140         .type = V4L2_EVENT_EOS
 141 };
 142
 143 static inline struct vicodec_ctx *file2ctx(struct file *file)
 144 {
 145         return container_of(file->private_data, struct vicodec_ctx, fh);
 146 }
 147
 148 static struct vicodec_q_data *get_q_data(struct vicodec_ctx *ctx,
 149                                          enum v4l2_buf_type type)
 150 {
 151         switch (type) {
 152         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 153         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 154                 return &ctx->q_data[V4L2_M2M_SRC];
 155         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 156         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 157                 return &ctx->q_data[V4L2_M2M_DST];
 158         default:
 159                 break;
 160         }
 161         return NULL;
 162 }
 163
 164 static void copy_cap_to_ref(const u8 *cap, const struct v4l2_fwht_pixfmt_info *info,
 165                 struct v4l2_fwht_state *state)
 166 {
 167         int plane_idx;
 168         u8 *p_ref = state->ref_frame.buf;
 169         unsigned int cap_stride = state->stride;
 170         unsigned int ref_stride = state->ref_stride;
 171
 172         for (plane_idx = 0; plane_idx < info->planes_num; plane_idx++) {
 173                 int i;
 174                 unsigned int h_div = (plane_idx == 1 || plane_idx == 2) ?
 175                         info->height_div : 1;
 176                 const u8 *row_cap = cap;
 177                 u8 *row_ref = p_ref;
 178
 179                 if (info->planes_num == 3 && plane_idx == 1) {
 180                         cap_stride /= 2;
 181                         ref_stride /= 2;
 182                 }
 183
 184                 if (plane_idx == 1 &&
 185                     (info->id == V4L2_PIX_FMT_NV24 ||
 186                      info->id == V4L2_PIX_FMT_NV42)) {
 187                         cap_stride *= 2;
 188                         ref_stride *= 2;
 189                 }
 190
 191                 for (i = 0; i < state->visible_height / h_div; i++) {
 192                         memcpy(row_ref, row_cap, ref_stride);
 193                         row_ref += ref_stride;
 194                         row_cap += cap_stride;
 195                 }
 196                 cap += cap_stride * (state->coded_height / h_div);
 197                 p_ref += ref_stride * (state->coded_height / h_div);
 198         }
 199 }
 200
 201 static bool validate_by_version(unsigned int flags, unsigned int version)
 202 {
 203         if (!version || version > FWHT_VERSION)
 204                 return false;
 205
 206         if (version >= 2) {
 207                 unsigned int components_num = 1 +
 208                         ((flags & FWHT_FL_COMPONENTS_NUM_MSK) >>
 209                          FWHT_FL_COMPONENTS_NUM_OFFSET);
 210                 unsigned int pixenc = flags & FWHT_FL_PIXENC_MSK;
 211
 212                 if (components_num == 0 || components_num > 4 || !pixenc)
 213                         return false;
 214         }
 215         return true;
 216 }
 217
 218 static bool validate_stateless_params_flags(const struct v4l2_ctrl_fwht_params *params,
 219                                             const struct v4l2_fwht_pixfmt_info *cur_info)
 220 {
 221         unsigned int width_div =
 222                 (params->flags & FWHT_FL_CHROMA_FULL_WIDTH) ? 1 : 2;
 223         unsigned int height_div =
 224                 (params->flags & FWHT_FL_CHROMA_FULL_HEIGHT) ? 1 : 2;
 225         unsigned int components_num = 3;
 226         unsigned int pixenc = 0;
 227
 228         if (params->version < 3)
 229                 return false;
 230
 231         components_num = 1 + ((params->flags & FWHT_FL_COMPONENTS_NUM_MSK) >>
 232                               FWHT_FL_COMPONENTS_NUM_OFFSET);
 233         pixenc = (params->flags & FWHT_FL_PIXENC_MSK);
 234         if (v4l2_fwht_validate_fmt(cur_info, width_div, height_div,
 235                                     components_num, pixenc))
 236                 return true;
 237         return false;
 238 }
 239
 240
 241 static void update_state_from_header(struct vicodec_ctx *ctx)
 242 {
 243         const struct fwht_cframe_hdr *p_hdr = &ctx->state.header;
 244
 245         ctx->state.visible_width = ntohl(p_hdr->width);
 246         ctx->state.visible_height = ntohl(p_hdr->height);
 247         ctx->state.colorspace = ntohl(p_hdr->colorspace);
 248         ctx->state.xfer_func = ntohl(p_hdr->xfer_func);
 249         ctx->state.ycbcr_enc = ntohl(p_hdr->ycbcr_enc);
 250         ctx->state.quantization = ntohl(p_hdr->quantization);
 251 }
 252
 253 static int device_process(struct vicodec_ctx *ctx,
 254                           struct vb2_v4l2_buffer *src_vb,
 255                           struct vb2_v4l2_buffer *dst_vb)
 256 {
 257         struct vicodec_dev *dev = ctx->dev;
 258         struct v4l2_fwht_state *state = &ctx->state;
 259         u8 *p_src, *p_dst;
 260         int ret = 0;
 261
 262         if (ctx->is_enc || ctx->is_stateless)
 263                 p_src = vb2_plane_vaddr(&src_vb->vb2_buf, 0);
 264         else
 265                 p_src = state->compressed_frame;
 266
 267         if (ctx->is_stateless) {
 268                 struct media_request *src_req = src_vb->vb2_buf.req_obj.req;
 269
 270                 ret = v4l2_ctrl_request_setup(src_req, &ctx->hdl);
 271                 if (ret)
 272                         return ret;
 273                 update_state_from_header(ctx);
 274
 275                 ctx->state.header.size =
 276                         htonl(vb2_get_plane_payload(&src_vb->vb2_buf, 0));
 277                 /*
 278                  * set the reference buffer from the reference timestamp
 279                  * only if this is a P-frame
 280                  */
 281                 if (!(ntohl(ctx->state.header.flags) & FWHT_FL_I_FRAME)) {
 282                         struct vb2_buffer *ref_vb2_buf;
 283                         int ref_buf_idx;
 284                         struct vb2_queue *vq_cap =
 285                                 v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
 286                                                 V4L2_BUF_TYPE_VIDEO_CAPTURE);
 287
 288                         ref_buf_idx = vb2_find_timestamp(vq_cap,
 289                                                          ctx->state.ref_frame_ts, 0);
 290                         if (ref_buf_idx < 0)
 291                                 return -EINVAL;
 292
 293                         ref_vb2_buf = vq_cap->bufs[ref_buf_idx];
 294                         if (ref_vb2_buf->state == VB2_BUF_STATE_ERROR)
 295                                 ret = -EINVAL;
 296                         ctx->state.ref_frame.buf =
 297                                 vb2_plane_vaddr(ref_vb2_buf, 0);
 298                 } else {
 299                         ctx->state.ref_frame.buf = NULL;
 300                 }
 301         }
 302         p_dst = vb2_plane_vaddr(&dst_vb->vb2_buf, 0);
 303         if (!p_src || !p_dst) {
 304                 v4l2_err(&dev->v4l2_dev,
 305                          "Acquiring kernel pointers to buffers failed\n");
 306                 return -EFAULT;
 307         }
 308
 309         if (ctx->is_enc) {
 310                 struct vicodec_q_data *q_src;
 311                 int comp_sz_or_errcode;
 312
 313                 q_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
 314                 state->info = q_src->info;
 315                 comp_sz_or_errcode = v4l2_fwht_encode(state, p_src, p_dst);
 316                 if (comp_sz_or_errcode < 0)
 317                         return comp_sz_or_errcode;
 318                 vb2_set_plane_payload(&dst_vb->vb2_buf, 0, comp_sz_or_errcode);
 319         } else {
 320                 struct vicodec_q_data *q_dst;
 321                 unsigned int comp_frame_size = ntohl(ctx->state.header.size);
 322
 323                 q_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
 324                 if (comp_frame_size > ctx->comp_max_size)
 325                         return -EINVAL;
 326                 state->info = q_dst->info;
 327                 ret = v4l2_fwht_decode(state, p_src, p_dst);
 328                 if (ret < 0)
 329                         return ret;
 330                 if (!ctx->is_stateless)
 331                         copy_cap_to_ref(p_dst, ctx->state.info, &ctx->state);
 332
 333                 vb2_set_plane_payload(&dst_vb->vb2_buf, 0, q_dst->sizeimage);
 334                 if (ntohl(ctx->state.header.flags) & FWHT_FL_I_FRAME)
 335                         dst_vb->flags |= V4L2_BUF_FLAG_KEYFRAME;
 336                 else
 337                         dst_vb->flags |= V4L2_BUF_FLAG_PFRAME;
 338         }
 339         return ret;
 340 }
 341
 342 /*
 343  * mem2mem callbacks
 344  */
 345 static enum vb2_buffer_state get_next_header(struct vicodec_ctx *ctx,
 346                                              u8 **pp, u32 sz)
 347 {
 348         static const u8 magic[] = {
 349                 0x4f, 0x4f, 0x4f, 0x4f, 0xff, 0xff, 0xff, 0xff
 350         };
 351         u8 *p = *pp;
 352         u32 state;
 353         u8 *header = (u8 *)&ctx->state.header;
 354
 355         state = VB2_BUF_STATE_DONE;
 356
 357         if (!ctx->header_size) {
 358                 state = VB2_BUF_STATE_ERROR;
 359                 for (; p < *pp + sz; p++) {
 360                         u32 copy;
 361
 362                         p = memchr(p, magic[ctx->comp_magic_cnt],
 363                                    *pp + sz - p);
 364                         if (!p) {
 365                                 ctx->comp_magic_cnt = 0;
 366                                 p = *pp + sz;
 367                                 break;
 368                         }
 369                         copy = sizeof(magic) - ctx->comp_magic_cnt;
 370                         if (*pp + sz - p < copy)
 371                                 copy = *pp + sz - p;
 372
 373                         memcpy(header + ctx->comp_magic_cnt, p, copy);
 374                         ctx->comp_magic_cnt += copy;
 375                         if (!memcmp(header, magic, ctx->comp_magic_cnt)) {
 376                                 p += copy;
 377                                 state = VB2_BUF_STATE_DONE;
 378                                 break;
 379                         }
 380                         ctx->comp_magic_cnt = 0;
 381                 }
 382                 if (ctx->comp_magic_cnt < sizeof(magic)) {
 383                         *pp = p;
 384                         return state;
 385                 }
 386                 ctx->header_size = sizeof(magic);
 387         }
 388
 389         if (ctx->header_size < sizeof(struct fwht_cframe_hdr)) {
 390                 u32 copy = sizeof(struct fwht_cframe_hdr) - ctx->header_size;
 391
 392                 if (*pp + sz - p < copy)
 393                         copy = *pp + sz - p;
 394
 395                 memcpy(header + ctx->header_size, p, copy);
 396                 p += copy;
 397                 ctx->header_size += copy;
 398         }
 399         *pp = p;
 400         return state;
 401 }
 402
 403 /* device_run() - prepares and starts the device */
 404 static void device_run(void *priv)
 405 {
 406         struct vicodec_ctx *ctx = priv;
 407         struct vicodec_dev *dev = ctx->dev;
 408         struct vb2_v4l2_buffer *src_buf, *dst_buf;
 409         struct vicodec_q_data *q_src, *q_dst;
 410         u32 state;
 411         struct media_request *src_req;
 412
 413         src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
 414         dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
 415         src_req = src_buf->vb2_buf.req_obj.req;
 416
 417         q_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
 418         q_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
 419
 420         state = VB2_BUF_STATE_DONE;
 421         if (device_process(ctx, src_buf, dst_buf))
 422                 state = VB2_BUF_STATE_ERROR;
 423         else
 424                 dst_buf->sequence = q_dst->sequence++;
 425         dst_buf->flags &= ~V4L2_BUF_FLAG_LAST;
 426         v4l2_m2m_buf_copy_metadata(src_buf, dst_buf, false);
 427
 428         spin_lock(ctx->lock);
 429         if (!ctx->comp_has_next_frame &&
 430             v4l2_m2m_is_last_draining_src_buf(ctx->fh.m2m_ctx, src_buf)) {
 431                 dst_buf->flags |= V4L2_BUF_FLAG_LAST;
 432                 v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
 433                 v4l2_m2m_mark_stopped(ctx->fh.m2m_ctx);
 434         }
 435         if (ctx->is_enc || ctx->is_stateless) {
 436                 src_buf->sequence = q_src->sequence++;
 437                 src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
 438                 v4l2_m2m_buf_done(src_buf, state);
 439         } else if (vb2_get_plane_payload(&src_buf->vb2_buf, 0) == ctx->cur_buf_offset) {
 440                 src_buf->sequence = q_src->sequence++;
 441                 src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
 442                 v4l2_m2m_buf_done(src_buf, state);
 443                 ctx->cur_buf_offset = 0;
 444                 ctx->comp_has_next_frame = false;
 445         }
 446         v4l2_m2m_buf_done(dst_buf, state);
 447
 448         ctx->comp_size = 0;
 449         ctx->header_size = 0;
 450         ctx->comp_magic_cnt = 0;
 451         ctx->comp_has_frame = false;
 452         spin_unlock(ctx->lock);
 453         if (ctx->is_stateless && src_req)
 454                 v4l2_ctrl_request_complete(src_req, &ctx->hdl);
 455
 456         if (ctx->is_enc)
 457                 v4l2_m2m_job_finish(dev->stateful_enc.m2m_dev, ctx->fh.m2m_ctx);
 458         else if (ctx->is_stateless)
 459                 v4l2_m2m_job_finish(dev->stateless_dec.m2m_dev,
 460                                     ctx->fh.m2m_ctx);
 461         else
 462                 v4l2_m2m_job_finish(dev->stateful_dec.m2m_dev, ctx->fh.m2m_ctx);
 463 }
 464
 465 static void job_remove_src_buf(struct vicodec_ctx *ctx, u32 state)
 466 {
 467         struct vb2_v4l2_buffer *src_buf;
 468         struct vicodec_q_data *q_src;
 469
 470         q_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
 471         spin_lock(ctx->lock);
 472         src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
 473         src_buf->sequence = q_src->sequence++;
 474         v4l2_m2m_buf_done(src_buf, state);
 475         ctx->cur_buf_offset = 0;
 476         spin_unlock(ctx->lock);
 477 }
 478
 479 static const struct v4l2_fwht_pixfmt_info *
 480 info_from_header(const struct fwht_cframe_hdr *p_hdr)
 481 {
 482         unsigned int flags = ntohl(p_hdr->flags);
 483         unsigned int width_div = (flags & FWHT_FL_CHROMA_FULL_WIDTH) ? 1 : 2;
 484         unsigned int height_div = (flags & FWHT_FL_CHROMA_FULL_HEIGHT) ? 1 : 2;
 485         unsigned int components_num = 3;
 486         unsigned int pixenc = 0;
 487         unsigned int version = ntohl(p_hdr->version);
 488
 489         if (version >= 2) {
 490                 components_num = 1 + ((flags & FWHT_FL_COMPONENTS_NUM_MSK) >>
 491                                 FWHT_FL_COMPONENTS_NUM_OFFSET);
 492                 pixenc = (flags & FWHT_FL_PIXENC_MSK);
 493         }
 494         return v4l2_fwht_find_nth_fmt(width_div, height_div,
 495                                      components_num, pixenc, 0);
 496 }
 497
 498 static bool is_header_valid(const struct fwht_cframe_hdr *p_hdr)
 499 {
 500         const struct v4l2_fwht_pixfmt_info *info;
 501         unsigned int w = ntohl(p_hdr->width);
 502         unsigned int h = ntohl(p_hdr->height);
 503         unsigned int version = ntohl(p_hdr->version);
 504         unsigned int flags = ntohl(p_hdr->flags);
 505
 506         if (w < MIN_WIDTH || w > MAX_WIDTH || h < MIN_HEIGHT || h > MAX_HEIGHT)
 507                 return false;
 508
 509         if (!validate_by_version(flags, version))
 510                 return false;
 511
 512         info = info_from_header(p_hdr);
 513         if (!info)
 514                 return false;
 515         return true;
 516 }
 517
 518 static void update_capture_data_from_header(struct vicodec_ctx *ctx)
 519 {
 520         struct vicodec_q_data *q_dst = get_q_data(ctx,
 521                                                   V4L2_BUF_TYPE_VIDEO_CAPTURE);
 522         const struct fwht_cframe_hdr *p_hdr = &ctx->state.header;
 523         const struct v4l2_fwht_pixfmt_info *info = info_from_header(p_hdr);
 524         unsigned int flags = ntohl(p_hdr->flags);
 525         unsigned int hdr_width_div = (flags & FWHT_FL_CHROMA_FULL_WIDTH) ? 1 : 2;
 526         unsigned int hdr_height_div = (flags & FWHT_FL_CHROMA_FULL_HEIGHT) ? 1 : 2;
 527
 528         /*
 529          * This function should not be used by a stateless codec since
 530          * it changes values in q_data that are not request specific
 531          */
 532         WARN_ON(ctx->is_stateless);
 533
 534         q_dst->info = info;
 535         q_dst->visible_width = ntohl(p_hdr->width);
 536         q_dst->visible_height = ntohl(p_hdr->height);
 537         q_dst->coded_width = vic_round_dim(q_dst->visible_width, hdr_width_div);
 538         q_dst->coded_height = vic_round_dim(q_dst->visible_height,
 539                                             hdr_height_div);
 540
 541         q_dst->sizeimage = q_dst->coded_width * q_dst->coded_height *
 542                 q_dst->info->sizeimage_mult / q_dst->info->sizeimage_div;
 543         ctx->state.colorspace = ntohl(p_hdr->colorspace);
 544
 545         ctx->state.xfer_func = ntohl(p_hdr->xfer_func);
 546         ctx->state.ycbcr_enc = ntohl(p_hdr->ycbcr_enc);
 547         ctx->state.quantization = ntohl(p_hdr->quantization);
 548 }
 549
 550 static void set_last_buffer(struct vb2_v4l2_buffer *dst_buf,
 551                             const struct vb2_v4l2_buffer *src_buf,
 552                             struct vicodec_ctx *ctx)
 553 {
 554         struct vicodec_q_data *q_dst = get_q_data(ctx,
 555                                                   V4L2_BUF_TYPE_VIDEO_CAPTURE);
 556
 557         vb2_set_plane_payload(&dst_buf->vb2_buf, 0, 0);
 558         dst_buf->sequence = q_dst->sequence++;
 559
 560         v4l2_m2m_buf_copy_metadata(src_buf, dst_buf, !ctx->is_enc);
 561         dst_buf->flags |= V4L2_BUF_FLAG_LAST;
 562         v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_DONE);
 563 }
 564
 565 static int job_ready(void *priv)
 566 {
 567         static const u8 magic[] = {
 568                 0x4f, 0x4f, 0x4f, 0x4f, 0xff, 0xff, 0xff, 0xff
 569         };
 570         struct vicodec_ctx *ctx = priv;
 571         struct vb2_v4l2_buffer *src_buf;
 572         u8 *p_src;
 573         u8 *p;
 574         u32 sz;
 575         u32 state;
 576         struct vicodec_q_data *q_dst = get_q_data(ctx,
 577                                                   V4L2_BUF_TYPE_VIDEO_CAPTURE);
 578         unsigned int flags;
 579         unsigned int hdr_width_div;
 580         unsigned int hdr_height_div;
 581         unsigned int max_to_copy;
 582         unsigned int comp_frame_size;
 583
 584         if (ctx->source_changed)
 585                 return 0;
 586         if (ctx->is_stateless || ctx->is_enc || ctx->comp_has_frame)
 587                 return 1;
 588
 589 restart:
 590         ctx->comp_has_next_frame = false;
 591         src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
 592         if (!src_buf)
 593                 return 0;
 594         p_src = vb2_plane_vaddr(&src_buf->vb2_buf, 0);
 595         sz = vb2_get_plane_payload(&src_buf->vb2_buf, 0);
 596         p = p_src + ctx->cur_buf_offset;
 597
 598         state = VB2_BUF_STATE_DONE;
 599
 600         if (ctx->header_size < sizeof(struct fwht_cframe_hdr)) {
 601                 state = get_next_header(ctx, &p, p_src + sz - p);
 602                 if (ctx->header_size < sizeof(struct fwht_cframe_hdr)) {
 603                         if (v4l2_m2m_is_last_draining_src_buf(ctx->fh.m2m_ctx,
 604                                                               src_buf))
 605                                 return 1;
 606                         job_remove_src_buf(ctx, state);
 607                         goto restart;
 608                 }
 609         }
 610
 611         comp_frame_size = ntohl(ctx->state.header.size);
 612
 613         /*
 614          * The current scanned frame might be the first frame of a new
 615          * resolution so its size might be larger than ctx->comp_max_size.
 616          * In that case it is copied up to the current buffer capacity and
 617          * the copy will continue after allocating new large enough buffer
 618          * when restreaming
 619          */
 620         max_to_copy = min(comp_frame_size, ctx->comp_max_size);
 621
 622         if (ctx->comp_size < max_to_copy) {
 623                 u32 copy = max_to_copy - ctx->comp_size;
 624
 625                 if (copy > p_src + sz - p)
 626                         copy = p_src + sz - p;
 627
 628                 memcpy(ctx->state.compressed_frame + ctx->comp_size,
 629                        p, copy);
 630                 p += copy;
 631                 ctx->comp_size += copy;
 632                 if (ctx->comp_size < max_to_copy) {
 633                         if (v4l2_m2m_is_last_draining_src_buf(ctx->fh.m2m_ctx,
 634                                                               src_buf))
 635                                 return 1;
 636                         job_remove_src_buf(ctx, state);
 637                         goto restart;
 638                 }
 639         }
 640         ctx->cur_buf_offset = p - p_src;
 641         if (ctx->comp_size == comp_frame_size)
 642                 ctx->comp_has_frame = true;
 643         ctx->comp_has_next_frame = false;
 644         if (ctx->comp_has_frame && sz - ctx->cur_buf_offset >=
 645                         sizeof(struct fwht_cframe_hdr)) {
 646                 struct fwht_cframe_hdr *p_hdr = (struct fwht_cframe_hdr *)p;
 647                 u32 frame_size = ntohl(p_hdr->size);
 648                 u32 remaining = sz - ctx->cur_buf_offset - sizeof(*p_hdr);
 649
 650                 if (!memcmp(p, magic, sizeof(magic)))
 651                         ctx->comp_has_next_frame = remaining >= frame_size;
 652         }
 653         /*
 654          * if the header is invalid the device_run will just drop the frame
 655          * with an error
 656          */
 657         if (!is_header_valid(&ctx->state.header) && ctx->comp_has_frame)
 658                 return 1;
 659         flags = ntohl(ctx->state.header.flags);
 660         hdr_width_div = (flags & FWHT_FL_CHROMA_FULL_WIDTH) ? 1 : 2;
 661         hdr_height_div = (flags & FWHT_FL_CHROMA_FULL_HEIGHT) ? 1 : 2;
 662
 663         if (ntohl(ctx->state.header.width) != q_dst->visible_width ||
 664             ntohl(ctx->state.header.height) != q_dst->visible_height ||
 665             !q_dst->info ||
 666             hdr_width_div != q_dst->info->width_div ||
 667             hdr_height_div != q_dst->info->height_div) {
 668                 static const struct v4l2_event rs_event = {
 669                         .type = V4L2_EVENT_SOURCE_CHANGE,
 670                         .u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
 671                 };
 672
 673                 struct vb2_v4l2_buffer *dst_buf =
 674                         v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
 675
 676                 update_capture_data_from_header(ctx);
 677                 v4l2_event_queue_fh(&ctx->fh, &rs_event);
 678                 set_last_buffer(dst_buf, src_buf, ctx);
 679                 ctx->source_changed = true;
 680                 return 0;
 681         }
 682         return 1;
 683 }
 684
 685 /*
 686  * video ioctls
 687  */
 688
 689 static const struct v4l2_fwht_pixfmt_info *find_fmt(u32 fmt)
 690 {
 691         const struct v4l2_fwht_pixfmt_info *info =
 692                 v4l2_fwht_find_pixfmt(fmt);
 693
 694         if (!info)
 695                 info = v4l2_fwht_get_pixfmt(0);
 696         return info;
 697 }
 698
 699 static int vidioc_querycap(struct file *file, void *priv,
 700                            struct v4l2_capability *cap)
 701 {
 702         strscpy(cap->driver, VICODEC_NAME, sizeof(cap->driver));
 703         strscpy(cap->card, VICODEC_NAME, sizeof(cap->card));
 704         snprintf(cap->bus_info, sizeof(cap->bus_info),
 705                         "platform:%s", VICODEC_NAME);
 706         return 0;
 707 }
 708
 709 static int enum_fmt(struct v4l2_fmtdesc *f, struct vicodec_ctx *ctx,
 710                     bool is_out)
 711 {
 712         bool is_uncomp = (ctx->is_enc && is_out) || (!ctx->is_enc && !is_out);
 713
 714         if (V4L2_TYPE_IS_MULTIPLANAR(f->type) && !multiplanar)
 715                 return -EINVAL;
 716         if (!V4L2_TYPE_IS_MULTIPLANAR(f->type) && multiplanar)
 717                 return -EINVAL;
 718
 719         if (is_uncomp) {
 720                 const struct v4l2_fwht_pixfmt_info *info =
 721                                         get_q_data(ctx, f->type)->info;
 722
 723                 if (ctx->is_enc ||
 724                     !vb2_is_streaming(&ctx->fh.m2m_ctx->cap_q_ctx.q))
 725                         info = v4l2_fwht_get_pixfmt(f->index);
 726                 else
 727                         info = v4l2_fwht_find_nth_fmt(info->width_div,
 728                                                      info->height_div,
 729                                                      info->components_num,
 730                                                      info->pixenc,
 731                                                      f->index);
 732                 if (!info)
 733                         return -EINVAL;
 734                 f->pixelformat = info->id;
 735         } else {
 736                 if (f->index)
 737                         return -EINVAL;
 738                 f->pixelformat = ctx->is_stateless ?
 739                         V4L2_PIX_FMT_FWHT_STATELESS : V4L2_PIX_FMT_FWHT;
 740                 if (!ctx->is_enc && !ctx->is_stateless)
 741                         f->flags = V4L2_FMT_FLAG_DYN_RESOLUTION |
 742                                    V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM;
 743         }
 744         return 0;
 745 }
 746
 747 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
 748                                    struct v4l2_fmtdesc *f)
 749 {
 750         struct vicodec_ctx *ctx = file2ctx(file);
 751
 752         return enum_fmt(f, ctx, false);
 753 }
 754
 755 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
 756                                    struct v4l2_fmtdesc *f)
 757 {
 758         struct vicodec_ctx *ctx = file2ctx(file);
 759
 760         return enum_fmt(f, ctx, true);
 761 }
 762
 763 static int vidioc_g_fmt(struct vicodec_ctx *ctx, struct v4l2_format *f)
 764 {
 765         struct vb2_queue *vq;
 766         struct vicodec_q_data *q_data;
 767         struct v4l2_pix_format_mplane *pix_mp;
 768         struct v4l2_pix_format *pix;
 769         const struct v4l2_fwht_pixfmt_info *info;
 770
 771         vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
 772         if (!vq)
 773                 return -EINVAL;
 774
 775         q_data = get_q_data(ctx, f->type);
 776         info = q_data->info;
 777
 778         switch (f->type) {
 779         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 780         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 781                 if (multiplanar)
 782                         return -EINVAL;
 783                 pix = &f->fmt.pix;
 784                 pix->width = q_data->coded_width;
 785                 pix->height = q_data->coded_height;
 786                 pix->field = V4L2_FIELD_NONE;
 787                 pix->pixelformat = info->id;
 788                 pix->bytesperline = q_data->coded_width *
 789                                         info->bytesperline_mult;
 790                 pix->sizeimage = q_data->sizeimage;
 791                 pix->colorspace = ctx->state.colorspace;
 792                 pix->xfer_func = ctx->state.xfer_func;
 793                 pix->ycbcr_enc = ctx->state.ycbcr_enc;
 794                 pix->quantization = ctx->state.quantization;
 795                 break;
 796
 797         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 798         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 799                 if (!multiplanar)
 800                         return -EINVAL;
 801                 pix_mp = &f->fmt.pix_mp;
 802                 pix_mp->width = q_data->coded_width;
 803                 pix_mp->height = q_data->coded_height;
 804                 pix_mp->field = V4L2_FIELD_NONE;
 805                 pix_mp->pixelformat = info->id;
 806                 pix_mp->num_planes = 1;
 807                 pix_mp->plane_fmt[0].bytesperline =
 808                                 q_data->coded_width * info->bytesperline_mult;
 809                 pix_mp->plane_fmt[0].sizeimage = q_data->sizeimage;
 810                 pix_mp->colorspace = ctx->state.colorspace;
 811                 pix_mp->xfer_func = ctx->state.xfer_func;
 812                 pix_mp->ycbcr_enc = ctx->state.ycbcr_enc;
 813                 pix_mp->quantization = ctx->state.quantization;
 814                 memset(pix_mp->reserved, 0, sizeof(pix_mp->reserved));
 815                 memset(pix_mp->plane_fmt[0].reserved, 0,
 816                        sizeof(pix_mp->plane_fmt[0].reserved));
 817                 break;
 818         default:
 819                 return -EINVAL;
 820         }
 821         return 0;
 822 }
 823
 824 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
 825                                 struct v4l2_format *f)
 826 {
 827         return vidioc_g_fmt(file2ctx(file), f);
 828 }
 829
 830 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 831                                 struct v4l2_format *f)
 832 {
 833         return vidioc_g_fmt(file2ctx(file), f);
 834 }
 835
 836 static int vidioc_try_fmt(struct vicodec_ctx *ctx, struct v4l2_format *f)
 837 {
 838         struct v4l2_pix_format_mplane *pix_mp;
 839         struct v4l2_pix_format *pix;
 840         struct v4l2_plane_pix_format *plane;
 841         const struct v4l2_fwht_pixfmt_info *info = ctx->is_stateless ?
 842                 &pixfmt_stateless_fwht : &pixfmt_fwht;
 843
 844         switch (f->type) {
 845         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 846         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 847                 pix = &f->fmt.pix;
 848                 if (pix->pixelformat != V4L2_PIX_FMT_FWHT &&
 849                     pix->pixelformat != V4L2_PIX_FMT_FWHT_STATELESS)
 850                         info = find_fmt(pix->pixelformat);
 851
 852                 pix->width = clamp(pix->width, MIN_WIDTH, MAX_WIDTH);
 853                 pix->width = vic_round_dim(pix->width, info->width_div);
 854
 855                 pix->height = clamp(pix->height, MIN_HEIGHT, MAX_HEIGHT);
 856                 pix->height = vic_round_dim(pix->height, info->height_div);
 857
 858                 pix->field = V4L2_FIELD_NONE;
 859                 pix->bytesperline =
 860                         pix->width * info->bytesperline_mult;
 861                 pix->sizeimage = pix->width * pix->height *
 862                         info->sizeimage_mult / info->sizeimage_div;
 863                 if (pix->pixelformat == V4L2_PIX_FMT_FWHT)
 864                         pix->sizeimage += sizeof(struct fwht_cframe_hdr);
 865                 break;
 866         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 867         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 868                 pix_mp = &f->fmt.pix_mp;
 869                 plane = pix_mp->plane_fmt;
 870                 if (pix_mp->pixelformat != V4L2_PIX_FMT_FWHT &&
 871                     pix_mp->pixelformat != V4L2_PIX_FMT_FWHT_STATELESS)
 872                         info = find_fmt(pix_mp->pixelformat);
 873                 pix_mp->num_planes = 1;
 874
 875                 pix_mp->width = clamp(pix_mp->width, MIN_WIDTH, MAX_WIDTH);
 876                 pix_mp->width = vic_round_dim(pix_mp->width, info->width_div);
 877
 878                 pix_mp->height = clamp(pix_mp->height, MIN_HEIGHT, MAX_HEIGHT);
 879                 pix_mp->height = vic_round_dim(pix_mp->height,
 880                                                info->height_div);
 881
 882                 pix_mp->field = V4L2_FIELD_NONE;
 883                 plane->bytesperline =
 884                         pix_mp->width * info->bytesperline_mult;
 885                 plane->sizeimage = pix_mp->width * pix_mp->height *
 886                         info->sizeimage_mult / info->sizeimage_div;
 887                 if (pix_mp->pixelformat == V4L2_PIX_FMT_FWHT)
 888                         plane->sizeimage += sizeof(struct fwht_cframe_hdr);
 889                 memset(pix_mp->reserved, 0, sizeof(pix_mp->reserved));
 890                 memset(plane->reserved, 0, sizeof(plane->reserved));
 891                 break;
 892         default:
 893                 return -EINVAL;
 894         }
 895
 896         return 0;
 897 }
 898
 899 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 900                                   struct v4l2_format *f)
 901 {
 902         struct vicodec_ctx *ctx = file2ctx(file);
 903         struct v4l2_pix_format_mplane *pix_mp;
 904         struct v4l2_pix_format *pix;
 905
 906         switch (f->type) {
 907         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 908                 if (multiplanar)
 909                         return -EINVAL;
 910                 pix = &f->fmt.pix;
 911                 pix->pixelformat = ctx->is_enc ? V4L2_PIX_FMT_FWHT :
 912                                    find_fmt(f->fmt.pix.pixelformat)->id;
 913                 pix->colorspace = ctx->state.colorspace;
 914                 pix->xfer_func = ctx->state.xfer_func;
 915                 pix->ycbcr_enc = ctx->state.ycbcr_enc;
 916                 pix->quantization = ctx->state.quantization;
 917                 break;
 918         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 919                 if (!multiplanar)
 920                         return -EINVAL;
 921                 pix_mp = &f->fmt.pix_mp;
 922                 pix_mp->pixelformat = ctx->is_enc ? V4L2_PIX_FMT_FWHT :
 923                                       find_fmt(pix_mp->pixelformat)->id;
 924                 pix_mp->colorspace = ctx->state.colorspace;
 925                 pix_mp->xfer_func = ctx->state.xfer_func;
 926                 pix_mp->ycbcr_enc = ctx->state.ycbcr_enc;
 927                 pix_mp->quantization = ctx->state.quantization;
 928                 break;
 929         default:
 930                 return -EINVAL;
 931         }
 932
 933         return vidioc_try_fmt(ctx, f);
 934 }
 935
 936 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
 937                                   struct v4l2_format *f)
 938 {
 939         struct vicodec_ctx *ctx = file2ctx(file);
 940         struct v4l2_pix_format_mplane *pix_mp;
 941         struct v4l2_pix_format *pix;
 942
 943         switch (f->type) {
 944         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 945                 if (multiplanar)
 946                         return -EINVAL;
 947                 pix = &f->fmt.pix;
 948                 if (ctx->is_enc)
 949                         pix->pixelformat = find_fmt(pix->pixelformat)->id;
 950                 else if (ctx->is_stateless)
 951                         pix->pixelformat = V4L2_PIX_FMT_FWHT_STATELESS;
 952                 else
 953                         pix->pixelformat = V4L2_PIX_FMT_FWHT;
 954                 if (!pix->colorspace)
 955                         pix->colorspace = V4L2_COLORSPACE_REC709;
 956                 break;
 957         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 958                 if (!multiplanar)
 959                         return -EINVAL;
 960                 pix_mp = &f->fmt.pix_mp;
 961                 if (ctx->is_enc)
 962                         pix_mp->pixelformat = find_fmt(pix_mp->pixelformat)->id;
 963                 else if (ctx->is_stateless)
 964                         pix_mp->pixelformat = V4L2_PIX_FMT_FWHT_STATELESS;
 965                 else
 966                         pix_mp->pixelformat = V4L2_PIX_FMT_FWHT;
 967                 if (!pix_mp->colorspace)
 968                         pix_mp->colorspace = V4L2_COLORSPACE_REC709;
 969                 break;
 970         default:
 971                 return -EINVAL;
 972         }
 973
 974         return vidioc_try_fmt(ctx, f);
 975 }
 976
 977 static int vidioc_s_fmt(struct vicodec_ctx *ctx, struct v4l2_format *f)
 978 {
 979         struct vicodec_q_data *q_data;
 980         struct vb2_queue *vq;
 981         bool fmt_changed = true;
 982         struct v4l2_pix_format_mplane *pix_mp;
 983         struct v4l2_pix_format *pix;
 984
 985         vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
 986         if (!vq)
 987                 return -EINVAL;
 988
 989         q_data = get_q_data(ctx, f->type);
 990         if (!q_data)
 991                 return -EINVAL;
 992
 993         switch (f->type) {
 994         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 995         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 996                 pix = &f->fmt.pix;
 997                 if (ctx->is_enc && V4L2_TYPE_IS_OUTPUT(f->type))
 998                         fmt_changed =
 999                                 !q_data->info ||
1000                                 q_data->info->id != pix->pixelformat ||
1001                                 q_data->coded_width != pix->width ||
1002                                 q_data->coded_height != pix->height;
1003
1004                 if (vb2_is_busy(vq) && fmt_changed)
1005                         return -EBUSY;
1006
1007                 if (pix->pixelformat == V4L2_PIX_FMT_FWHT)
1008                         q_data->info = &pixfmt_fwht;
1009                 else if (pix->pixelformat == V4L2_PIX_FMT_FWHT_STATELESS)
1010                         q_data->info = &pixfmt_stateless_fwht;
1011                 else
1012                         q_data->info = find_fmt(pix->pixelformat);
1013                 q_data->coded_width = pix->width;
1014                 q_data->coded_height = pix->height;
1015                 q_data->sizeimage = pix->sizeimage;
1016                 break;
1017         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1018         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1019                 pix_mp = &f->fmt.pix_mp;
1020                 if (ctx->is_enc && V4L2_TYPE_IS_OUTPUT(f->type))
1021                         fmt_changed =
1022                                 !q_data->info ||
1023                                 q_data->info->id != pix_mp->pixelformat ||
1024                                 q_data->coded_width != pix_mp->width ||
1025                                 q_data->coded_height != pix_mp->height;
1026
1027                 if (vb2_is_busy(vq) && fmt_changed)
1028                         return -EBUSY;
1029
1030                 if (pix_mp->pixelformat == V4L2_PIX_FMT_FWHT)
1031                         q_data->info = &pixfmt_fwht;
1032                 else if (pix_mp->pixelformat == V4L2_PIX_FMT_FWHT_STATELESS)
1033                         q_data->info = &pixfmt_stateless_fwht;
1034                 else
1035                         q_data->info = find_fmt(pix_mp->pixelformat);
1036                 q_data->coded_width = pix_mp->width;
1037                 q_data->coded_height = pix_mp->height;
1038                 q_data->sizeimage = pix_mp->plane_fmt[0].sizeimage;
1039                 break;
1040         default:
1041                 return -EINVAL;
1042         }
1043
1044         dprintk(ctx->dev,
1045                 "Setting format for type %d, coded wxh: %dx%d, fourcc: 0x%08x\n",
1046                 f->type, q_data->coded_width, q_data->coded_height,
1047                 q_data->info->id);
1048
1049         return 0;
1050 }
1051
1052 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1053                                 struct v4l2_format *f)
1054 {
1055         int ret;
1056
1057         ret = vidioc_try_fmt_vid_cap(file, priv, f);
1058         if (ret)
1059                 return ret;
1060
1061         return vidioc_s_fmt(file2ctx(file), f);
1062 }
1063
1064 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
1065                                 struct v4l2_format *f)
1066 {
1067         struct vicodec_ctx *ctx = file2ctx(file);
1068         struct vicodec_q_data *q_data;
1069         struct vicodec_q_data *q_data_cap;
1070         struct v4l2_pix_format *pix;
1071         struct v4l2_pix_format_mplane *pix_mp;
1072         u32 coded_w = 0, coded_h = 0;
1073         unsigned int size = 0;
1074         int ret;
1075
1076         q_data = get_q_data(ctx, f->type);
1077         q_data_cap = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
1078
1079         ret = vidioc_try_fmt_vid_out(file, priv, f);
1080         if (ret)
1081                 return ret;
1082
1083         if (ctx->is_enc) {
1084                 struct vb2_queue *vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
1085                 struct vb2_queue *vq_cap = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
1086                                                            V4L2_BUF_TYPE_VIDEO_CAPTURE);
1087                 const struct v4l2_fwht_pixfmt_info *info = ctx->is_stateless ?
1088                         &pixfmt_stateless_fwht : &pixfmt_fwht;
1089
1090                 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1091                         coded_w = f->fmt.pix.width;
1092                         coded_h = f->fmt.pix.height;
1093                 } else {
1094                         coded_w = f->fmt.pix_mp.width;
1095                         coded_h = f->fmt.pix_mp.height;
1096                 }
1097                 if (vb2_is_busy(vq) && (coded_w != q_data->coded_width ||
1098                                         coded_h != q_data->coded_height))
1099                         return -EBUSY;
1100                 size = coded_w * coded_h *
1101                         info->sizeimage_mult / info->sizeimage_div;
1102                 if (!ctx->is_stateless)
1103                         size += sizeof(struct fwht_cframe_hdr);
1104
1105                 if (vb2_is_busy(vq_cap) && size > q_data_cap->sizeimage)
1106                         return -EBUSY;
1107         }
1108
1109         ret = vidioc_s_fmt(file2ctx(file), f);
1110         if (!ret) {
1111                 if (ctx->is_enc) {
1112                         q_data->visible_width = coded_w;
1113                         q_data->visible_height = coded_h;
1114                         q_data_cap->coded_width = coded_w;
1115                         q_data_cap->coded_height = coded_h;
1116                         q_data_cap->sizeimage = size;
1117                 }
1118
1119                 switch (f->type) {
1120                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1121                         pix = &f->fmt.pix;
1122                         ctx->state.colorspace = pix->colorspace;
1123                         ctx->state.xfer_func = pix->xfer_func;
1124                         ctx->state.ycbcr_enc = pix->ycbcr_enc;
1125                         ctx->state.quantization = pix->quantization;
1126                         break;
1127                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1128                         pix_mp = &f->fmt.pix_mp;
1129                         ctx->state.colorspace = pix_mp->colorspace;
1130                         ctx->state.xfer_func = pix_mp->xfer_func;
1131                         ctx->state.ycbcr_enc = pix_mp->ycbcr_enc;
1132                         ctx->state.quantization = pix_mp->quantization;
1133                         break;
1134                 default:
1135                         break;
1136                 }
1137         }
1138         return ret;
1139 }
1140
1141 static int vidioc_g_selection(struct file *file, void *priv,
1142                               struct v4l2_selection *s)
1143 {
1144         struct vicodec_ctx *ctx = file2ctx(file);
1145         struct vicodec_q_data *q_data;
1146
1147         q_data = get_q_data(ctx, s->type);
1148         if (!q_data)
1149                 return -EINVAL;
1150         /*
1151          * encoder supports only cropping on the OUTPUT buffer
1152          * decoder supports only composing on the CAPTURE buffer
1153          */
1154         if (ctx->is_enc && s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1155                 switch (s->target) {
1156                 case V4L2_SEL_TGT_CROP:
1157                         s->r.left = 0;
1158                         s->r.top = 0;
1159                         s->r.width = q_data->visible_width;
1160                         s->r.height = q_data->visible_height;
1161                         return 0;
1162                 case V4L2_SEL_TGT_CROP_DEFAULT:
1163                 case V4L2_SEL_TGT_CROP_BOUNDS:
1164                         s->r.left = 0;
1165                         s->r.top = 0;
1166                         s->r.width = q_data->coded_width;
1167                         s->r.height = q_data->coded_height;
1168                         return 0;
1169                 }
1170         } else if (!ctx->is_enc && s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1171                 switch (s->target) {
1172                 case V4L2_SEL_TGT_COMPOSE:
1173                         s->r.left = 0;
1174                         s->r.top = 0;
1175                         s->r.width = q_data->visible_width;
1176                         s->r.height = q_data->visible_height;
1177                         return 0;
1178                 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
1179                 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1180                         s->r.left = 0;
1181                         s->r.top = 0;
1182                         s->r.width = q_data->coded_width;
1183                         s->r.height = q_data->coded_height;
1184                         return 0;
1185                 }
1186         }
1187         return -EINVAL;
1188 }
1189
1190 static int vidioc_s_selection(struct file *file, void *priv,
1191                               struct v4l2_selection *s)
1192 {
1193         struct vicodec_ctx *ctx = file2ctx(file);
1194         struct vicodec_q_data *q_data;
1195
1196         if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1197                 return -EINVAL;
1198
1199         q_data = get_q_data(ctx, s->type);
1200         if (!q_data)
1201                 return -EINVAL;
1202
1203         if (!ctx->is_enc || s->target != V4L2_SEL_TGT_CROP)
1204                 return -EINVAL;
1205
1206         s->r.left = 0;
1207         s->r.top = 0;
1208         q_data->visible_width = clamp(s->r.width, MIN_WIDTH,
1209                                       q_data->coded_width);
1210         s->r.width = q_data->visible_width;
1211         q_data->visible_height = clamp(s->r.height, MIN_HEIGHT,
1212                                        q_data->coded_height);
1213         s->r.height = q_data->visible_height;
1214         return 0;
1215 }
1216
1217 static int vicodec_encoder_cmd(struct file *file, void *fh,
1218                             struct v4l2_encoder_cmd *ec)
1219 {
1220         struct vicodec_ctx *ctx = file2ctx(file);
1221         int ret;
1222
1223         ret = v4l2_m2m_ioctl_try_encoder_cmd(file, fh, ec);
1224         if (ret < 0)
1225                 return ret;
1226
1227         if (!vb2_is_streaming(&ctx->fh.m2m_ctx->cap_q_ctx.q) ||
1228             !vb2_is_streaming(&ctx->fh.m2m_ctx->out_q_ctx.q))
1229                 return 0;
1230
1231         ret = v4l2_m2m_ioctl_encoder_cmd(file, fh, ec);
1232         if (ret < 0)
1233                 return ret;
1234
1235         if (ec->cmd == V4L2_ENC_CMD_STOP &&
1236             v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
1237                 v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
1238
1239         if (ec->cmd == V4L2_ENC_CMD_START &&
1240             v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
1241                 vb2_clear_last_buffer_dequeued(&ctx->fh.m2m_ctx->cap_q_ctx.q);
1242
1243         return 0;
1244 }
1245
1246 static int vicodec_decoder_cmd(struct file *file, void *fh,
1247                             struct v4l2_decoder_cmd *dc)
1248 {
1249         struct vicodec_ctx *ctx = file2ctx(file);
1250         int ret;
1251
1252         ret = v4l2_m2m_ioctl_try_decoder_cmd(file, fh, dc);
1253         if (ret < 0)
1254                 return ret;
1255
1256         if (!vb2_is_streaming(&ctx->fh.m2m_ctx->cap_q_ctx.q) ||
1257             !vb2_is_streaming(&ctx->fh.m2m_ctx->out_q_ctx.q))
1258                 return 0;
1259
1260         ret = v4l2_m2m_ioctl_decoder_cmd(file, fh, dc);
1261         if (ret < 0)
1262                 return ret;
1263
1264         if (dc->cmd == V4L2_DEC_CMD_STOP &&
1265             v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
1266                 v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
1267
1268         if (dc->cmd == V4L2_DEC_CMD_START &&
1269             v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
1270                 vb2_clear_last_buffer_dequeued(&ctx->fh.m2m_ctx->cap_q_ctx.q);
1271
1272         return 0;
1273 }
1274
1275 static int vicodec_enum_framesizes(struct file *file, void *fh,
1276                                    struct v4l2_frmsizeenum *fsize)
1277 {
1278         switch (fsize->pixel_format) {
1279         case V4L2_PIX_FMT_FWHT_STATELESS:
1280                 break;
1281         case V4L2_PIX_FMT_FWHT:
1282                 break;
1283         default:
1284                 if (find_fmt(fsize->pixel_format)->id == fsize->pixel_format)
1285                         break;
1286                 return -EINVAL;
1287         }
1288
1289         if (fsize->index)
1290                 return -EINVAL;
1291
1292         fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
1293
1294         fsize->stepwise.min_width = MIN_WIDTH;
1295         fsize->stepwise.max_width = MAX_WIDTH;
1296         fsize->stepwise.step_width = 8;
1297         fsize->stepwise.min_height = MIN_HEIGHT;
1298         fsize->stepwise.max_height = MAX_HEIGHT;
1299         fsize->stepwise.step_height = 8;
1300
1301         return 0;
1302 }
1303
1304 static int vicodec_subscribe_event(struct v4l2_fh *fh,
1305                                 const struct v4l2_event_subscription *sub)
1306 {
1307         struct vicodec_ctx *ctx = container_of(fh, struct vicodec_ctx, fh);
1308
1309         switch (sub->type) {
1310         case V4L2_EVENT_SOURCE_CHANGE:
1311                 if (ctx->is_enc)
1312                         return -EINVAL;
1313                 /* fall through */
1314         case V4L2_EVENT_EOS:
1315                 if (ctx->is_stateless)
1316                         return -EINVAL;
1317                 return v4l2_event_subscribe(fh, sub, 0, NULL);
1318         default:
1319                 return v4l2_ctrl_subscribe_event(fh, sub);
1320         }
1321 }
1322
1323 static const struct v4l2_ioctl_ops vicodec_ioctl_ops = {
1324         .vidioc_querycap        = vidioc_querycap,
1325
1326         .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1327         .vidioc_g_fmt_vid_cap   = vidioc_g_fmt_vid_cap,
1328         .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1329         .vidioc_s_fmt_vid_cap   = vidioc_s_fmt_vid_cap,
1330
1331         .vidioc_g_fmt_vid_cap_mplane    = vidioc_g_fmt_vid_cap,
1332         .vidioc_try_fmt_vid_cap_mplane  = vidioc_try_fmt_vid_cap,
1333         .vidioc_s_fmt_vid_cap_mplane    = vidioc_s_fmt_vid_cap,
1334
1335         .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
1336         .vidioc_g_fmt_vid_out   = vidioc_g_fmt_vid_out,
1337         .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
1338         .vidioc_s_fmt_vid_out   = vidioc_s_fmt_vid_out,
1339
1340         .vidioc_g_fmt_vid_out_mplane    = vidioc_g_fmt_vid_out,
1341         .vidioc_try_fmt_vid_out_mplane  = vidioc_try_fmt_vid_out,
1342         .vidioc_s_fmt_vid_out_mplane    = vidioc_s_fmt_vid_out,
1343
1344         .vidioc_reqbufs         = v4l2_m2m_ioctl_reqbufs,
1345         .vidioc_querybuf        = v4l2_m2m_ioctl_querybuf,
1346         .vidioc_qbuf            = v4l2_m2m_ioctl_qbuf,
1347         .vidioc_dqbuf           = v4l2_m2m_ioctl_dqbuf,
1348         .vidioc_prepare_buf     = v4l2_m2m_ioctl_prepare_buf,
1349         .vidioc_create_bufs     = v4l2_m2m_ioctl_create_bufs,
1350         .vidioc_expbuf          = v4l2_m2m_ioctl_expbuf,
1351
1352         .vidioc_streamon        = v4l2_m2m_ioctl_streamon,
1353         .vidioc_streamoff       = v4l2_m2m_ioctl_streamoff,
1354
1355         .vidioc_g_selection     = vidioc_g_selection,
1356         .vidioc_s_selection     = vidioc_s_selection,
1357
1358         .vidioc_try_encoder_cmd = v4l2_m2m_ioctl_try_encoder_cmd,
1359         .vidioc_encoder_cmd     = vicodec_encoder_cmd,
1360         .vidioc_try_decoder_cmd = v4l2_m2m_ioctl_try_decoder_cmd,
1361         .vidioc_decoder_cmd     = vicodec_decoder_cmd,
1362         .vidioc_enum_framesizes = vicodec_enum_framesizes,
1363
1364         .vidioc_subscribe_event = vicodec_subscribe_event,
1365         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1366 };
1367
1368
1369 /*
1370  * Queue operations
1371  */
1372
1373 static int vicodec_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
1374                                unsigned int *nplanes, unsigned int sizes[],
1375                                struct device *alloc_devs[])
1376 {
1377         struct vicodec_ctx *ctx = vb2_get_drv_priv(vq);
1378         struct vicodec_q_data *q_data = get_q_data(ctx, vq->type);
1379         unsigned int size = q_data->sizeimage;
1380
1381         if (*nplanes)
1382                 return sizes[0] < size ? -EINVAL : 0;
1383
1384         *nplanes = 1;
1385         sizes[0] = size;
1386         q_data->vb2_sizeimage = size;
1387         return 0;
1388 }
1389
1390 static int vicodec_buf_out_validate(struct vb2_buffer *vb)
1391 {
1392         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1393
1394         vbuf->field = V4L2_FIELD_NONE;
1395         return 0;
1396 }
1397
1398 static int vicodec_buf_prepare(struct vb2_buffer *vb)
1399 {
1400         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1401         struct vicodec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1402         struct vicodec_q_data *q_data;
1403
1404         dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
1405
1406         q_data = get_q_data(ctx, vb->vb2_queue->type);
1407         if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
1408                 if (vbuf->field == V4L2_FIELD_ANY)
1409                         vbuf->field = V4L2_FIELD_NONE;
1410                 if (vbuf->field != V4L2_FIELD_NONE) {
1411                         dprintk(ctx->dev, "%s field isn't supported\n",
1412                                         __func__);
1413                         return -EINVAL;
1414                 }
1415         }
1416
1417         if (vb2_plane_size(vb, 0) < q_data->vb2_sizeimage) {
1418                 dprintk(ctx->dev,
1419                         "%s data will not fit into plane (%lu < %lu)\n",
1420                         __func__, vb2_plane_size(vb, 0),
1421                         (long)q_data->vb2_sizeimage);
1422                 return -EINVAL;
1423         }
1424
1425         return 0;
1426 }
1427
1428 static void vicodec_buf_queue(struct vb2_buffer *vb)
1429 {
1430         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1431         struct vicodec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1432         unsigned int sz = vb2_get_plane_payload(&vbuf->vb2_buf, 0);
1433         u8 *p_src = vb2_plane_vaddr(&vbuf->vb2_buf, 0);
1434         u8 *p = p_src;
1435         struct vb2_queue *vq_out = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
1436                                                    V4L2_BUF_TYPE_VIDEO_OUTPUT);
1437         struct vb2_queue *vq_cap = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
1438                                                    V4L2_BUF_TYPE_VIDEO_CAPTURE);
1439         bool header_valid = false;
1440         static const struct v4l2_event rs_event = {
1441                 .type = V4L2_EVENT_SOURCE_CHANGE,
1442                 .u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
1443         };
1444
1445         if (V4L2_TYPE_IS_CAPTURE(vb->vb2_queue->type) &&
1446             vb2_is_streaming(vb->vb2_queue) &&
1447             v4l2_m2m_dst_buf_is_last(ctx->fh.m2m_ctx)) {
1448                 unsigned int i;
1449
1450                 for (i = 0; i < vb->num_planes; i++)
1451                         vb->planes[i].bytesused = 0;
1452
1453                 vbuf->field = V4L2_FIELD_NONE;
1454                 vbuf->sequence =
1455                         get_q_data(ctx, vb->vb2_queue->type)->sequence++;
1456
1457                 v4l2_m2m_last_buffer_done(ctx->fh.m2m_ctx, vbuf);
1458                 v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
1459                 return;
1460         }
1461
1462         /* buf_queue handles only the first source change event */
1463         if (ctx->first_source_change_sent) {
1464                 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1465                 return;
1466         }
1467
1468         /*
1469          * if both queues are streaming, the source change event is
1470          * handled in job_ready
1471          */
1472         if (vb2_is_streaming(vq_cap) && vb2_is_streaming(vq_out)) {
1473                 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1474                 return;
1475         }
1476
1477         /*
1478          * source change event is relevant only for the stateful decoder
1479          * in the compressed stream
1480          */
1481         if (ctx->is_stateless || ctx->is_enc ||
1482             V4L2_TYPE_IS_CAPTURE(vb->vb2_queue->type)) {
1483                 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1484                 return;
1485         }
1486
1487         do {
1488                 enum vb2_buffer_state state =
1489                         get_next_header(ctx, &p, p_src + sz - p);
1490
1491                 if (ctx->header_size < sizeof(struct fwht_cframe_hdr)) {
1492                         v4l2_m2m_buf_done(vbuf, state);
1493                         return;
1494                 }
1495                 header_valid = is_header_valid(&ctx->state.header);
1496                 /*
1497                  * p points right after the end of the header in the
1498                  * buffer. If the header is invalid we set p to point
1499                  * to the next byte after the start of the header
1500                  */
1501                 if (!header_valid) {
1502                         p = p - sizeof(struct fwht_cframe_hdr) + 1;
1503                         if (p < p_src)
1504                                 p = p_src;
1505                         ctx->header_size = 0;
1506                         ctx->comp_magic_cnt = 0;
1507                 }
1508
1509         } while (!header_valid);
1510
1511         ctx->cur_buf_offset = p - p_src;
1512         update_capture_data_from_header(ctx);
1513         ctx->first_source_change_sent = true;
1514         v4l2_event_queue_fh(&ctx->fh, &rs_event);
1515         v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1516 }
1517
1518 static void vicodec_return_bufs(struct vb2_queue *q, u32 state)
1519 {
1520         struct vicodec_ctx *ctx = vb2_get_drv_priv(q);
1521         struct vb2_v4l2_buffer *vbuf;
1522
1523         for (;;) {
1524                 if (V4L2_TYPE_IS_OUTPUT(q->type))
1525                         vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
1526                 else
1527                         vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
1528                 if (vbuf == NULL)
1529                         return;
1530                 v4l2_ctrl_request_complete(vbuf->vb2_buf.req_obj.req,
1531                                            &ctx->hdl);
1532                 spin_lock(ctx->lock);
1533                 v4l2_m2m_buf_done(vbuf, state);
1534                 spin_unlock(ctx->lock);
1535         }
1536 }
1537
1538 static unsigned int total_frame_size(struct vicodec_q_data *q_data)
1539 {
1540         unsigned int size;
1541         unsigned int chroma_div;
1542
1543         if (!q_data->info) {
1544                 WARN_ON(1);
1545                 return 0;
1546         }
1547         size = q_data->coded_width * q_data->coded_height;
1548         chroma_div = q_data->info->width_div * q_data->info->height_div;
1549
1550         if (q_data->info->components_num == 4)
1551                 return 2 * size + 2 * (size / chroma_div);
1552         else if (q_data->info->components_num == 3)
1553                 return size + 2 * (size / chroma_div);
1554         return size;
1555 }
1556
1557 static int vicodec_start_streaming(struct vb2_queue *q,
1558                                    unsigned int count)
1559 {
1560         struct vicodec_ctx *ctx = vb2_get_drv_priv(q);
1561         struct vicodec_q_data *q_data = get_q_data(ctx, q->type);
1562         struct v4l2_fwht_state *state = &ctx->state;
1563         const struct v4l2_fwht_pixfmt_info *info = q_data->info;
1564         unsigned int size = q_data->coded_width * q_data->coded_height;
1565         unsigned int chroma_div;
1566         unsigned int total_planes_size;
1567         u8 *new_comp_frame = NULL;
1568
1569         chroma_div = info->width_div * info->height_div;
1570         q_data->sequence = 0;
1571
1572         v4l2_m2m_update_start_streaming_state(ctx->fh.m2m_ctx, q);
1573
1574         state->gop_cnt = 0;
1575
1576         if ((V4L2_TYPE_IS_OUTPUT(q->type) && !ctx->is_enc) ||
1577             (V4L2_TYPE_IS_CAPTURE(q->type) && ctx->is_enc))
1578                 return 0;
1579
1580         if (info->id == V4L2_PIX_FMT_FWHT ||
1581             info->id == V4L2_PIX_FMT_FWHT_STATELESS) {
1582                 vicodec_return_bufs(q, VB2_BUF_STATE_QUEUED);
1583                 return -EINVAL;
1584         }
1585         total_planes_size = total_frame_size(q_data);
1586         ctx->comp_max_size = total_planes_size;
1587
1588         state->visible_width = q_data->visible_width;
1589         state->visible_height = q_data->visible_height;
1590         state->coded_width = q_data->coded_width;
1591         state->coded_height = q_data->coded_height;
1592         state->stride = q_data->coded_width *
1593                                 info->bytesperline_mult;
1594
1595         if (ctx->is_stateless) {
1596                 state->ref_stride = state->stride;
1597                 return 0;
1598         }
1599         state->ref_stride = q_data->coded_width * info->luma_alpha_step;
1600
1601         state->ref_frame.buf = kvmalloc(total_planes_size, GFP_KERNEL);
1602         state->ref_frame.luma = state->ref_frame.buf;
1603         new_comp_frame = kvmalloc(ctx->comp_max_size, GFP_KERNEL);
1604
1605         if (!state->ref_frame.luma || !new_comp_frame) {
1606                 kvfree(state->ref_frame.luma);
1607                 kvfree(new_comp_frame);
1608                 vicodec_return_bufs(q, VB2_BUF_STATE_QUEUED);
1609                 return -ENOMEM;
1610         }
1611         /*
1612          * if state->compressed_frame was already allocated then
1613          * it contain data of the first frame of the new resolution
1614          */
1615         if (state->compressed_frame) {
1616                 if (ctx->comp_size > ctx->comp_max_size)
1617                         ctx->comp_size = ctx->comp_max_size;
1618
1619                 memcpy(new_comp_frame,
1620                        state->compressed_frame, ctx->comp_size);
1621         }
1622
1623         kvfree(state->compressed_frame);
1624         state->compressed_frame = new_comp_frame;
1625
1626         if (info->components_num < 3) {
1627                 state->ref_frame.cb = NULL;
1628                 state->ref_frame.cr = NULL;
1629                 state->ref_frame.alpha = NULL;
1630                 return 0;
1631         }
1632
1633         state->ref_frame.cb = state->ref_frame.luma + size;
1634         state->ref_frame.cr = state->ref_frame.cb + size / chroma_div;
1635
1636         if (info->components_num == 4)
1637                 state->ref_frame.alpha =
1638                         state->ref_frame.cr + size / chroma_div;
1639         else
1640                 state->ref_frame.alpha = NULL;
1641
1642         return 0;
1643 }
1644
1645 static void vicodec_stop_streaming(struct vb2_queue *q)
1646 {
1647         struct vicodec_ctx *ctx = vb2_get_drv_priv(q);
1648
1649         vicodec_return_bufs(q, VB2_BUF_STATE_ERROR);
1650
1651         v4l2_m2m_update_stop_streaming_state(ctx->fh.m2m_ctx, q);
1652
1653         if (V4L2_TYPE_IS_OUTPUT(q->type) &&
1654             v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
1655                 v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
1656
1657         if (!ctx->is_enc && V4L2_TYPE_IS_OUTPUT(q->type))
1658                 ctx->first_source_change_sent = false;
1659
1660         if ((!V4L2_TYPE_IS_OUTPUT(q->type) && !ctx->is_enc) ||
1661             (V4L2_TYPE_IS_OUTPUT(q->type) && ctx->is_enc)) {
1662                 if (!ctx->is_stateless)
1663                         kvfree(ctx->state.ref_frame.buf);
1664                 ctx->state.ref_frame.buf = NULL;
1665                 ctx->state.ref_frame.luma = NULL;
1666                 ctx->comp_max_size = 0;
1667                 ctx->source_changed = false;
1668         }
1669         if (V4L2_TYPE_IS_OUTPUT(q->type) && !ctx->is_enc) {
1670                 ctx->cur_buf_offset = 0;
1671                 ctx->comp_size = 0;
1672                 ctx->header_size = 0;
1673                 ctx->comp_magic_cnt = 0;
1674                 ctx->comp_has_frame = 0;
1675                 ctx->comp_has_next_frame = 0;
1676         }
1677 }
1678
1679 static void vicodec_buf_request_complete(struct vb2_buffer *vb)
1680 {
1681         struct vicodec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1682
1683         v4l2_ctrl_request_complete(vb->req_obj.req, &ctx->hdl);
1684 }
1685
1686
1687 static const struct vb2_ops vicodec_qops = {
1688         .queue_setup            = vicodec_queue_setup,
1689         .buf_out_validate       = vicodec_buf_out_validate,
1690         .buf_prepare            = vicodec_buf_prepare,
1691         .buf_queue              = vicodec_buf_queue,
1692         .buf_request_complete   = vicodec_buf_request_complete,
1693         .start_streaming        = vicodec_start_streaming,
1694         .stop_streaming         = vicodec_stop_streaming,
1695         .wait_prepare           = vb2_ops_wait_prepare,
1696         .wait_finish            = vb2_ops_wait_finish,
1697 };
1698
1699 static int queue_init(void *priv, struct vb2_queue *src_vq,
1700                       struct vb2_queue *dst_vq)
1701 {
1702         struct vicodec_ctx *ctx = priv;
1703         int ret;
1704
1705         src_vq->type = (multiplanar ?
1706                         V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE :
1707                         V4L2_BUF_TYPE_VIDEO_OUTPUT);
1708         src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1709         src_vq->drv_priv = ctx;
1710         src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
1711         src_vq->ops = &vicodec_qops;
1712         src_vq->mem_ops = &vb2_vmalloc_memops;
1713         src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1714         if (ctx->is_enc)
1715                 src_vq->lock = &ctx->dev->stateful_enc.mutex;
1716         else if (ctx->is_stateless)
1717                 src_vq->lock = &ctx->dev->stateless_dec.mutex;
1718         else
1719                 src_vq->lock = &ctx->dev->stateful_dec.mutex;
1720         src_vq->supports_requests = ctx->is_stateless;
1721         src_vq->requires_requests = ctx->is_stateless;
1722         ret = vb2_queue_init(src_vq);
1723         if (ret)
1724                 return ret;
1725
1726         dst_vq->type = (multiplanar ?
1727                         V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE :
1728                         V4L2_BUF_TYPE_VIDEO_CAPTURE);
1729         dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1730         dst_vq->drv_priv = ctx;
1731         dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
1732         dst_vq->ops = &vicodec_qops;
1733         dst_vq->mem_ops = &vb2_vmalloc_memops;
1734         dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1735         dst_vq->lock = src_vq->lock;
1736
1737         return vb2_queue_init(dst_vq);
1738 }
1739
1740 static int vicodec_try_ctrl(struct v4l2_ctrl *ctrl)
1741 {
1742         struct vicodec_ctx *ctx = container_of(ctrl->handler,
1743                         struct vicodec_ctx, hdl);
1744         const struct v4l2_ctrl_fwht_params *params;
1745         struct vicodec_q_data *q_dst = get_q_data(ctx,
1746                         V4L2_BUF_TYPE_VIDEO_CAPTURE);
1747
1748         switch (ctrl->id) {
1749         case V4L2_CID_MPEG_VIDEO_FWHT_PARAMS:
1750                 if (!q_dst->info)
1751                         return -EINVAL;
1752                 params = ctrl->p_new.p_fwht_params;
1753                 if (params->width > q_dst->coded_width ||
1754                     params->width < MIN_WIDTH ||
1755                     params->height > q_dst->coded_height ||
1756                     params->height < MIN_HEIGHT)
1757                         return -EINVAL;
1758                 if (!validate_by_version(params->flags, params->version))
1759                         return -EINVAL;
1760                 if (!validate_stateless_params_flags(params, q_dst->info))
1761                         return -EINVAL;
1762                 return 0;
1763         default:
1764                 return 0;
1765         }
1766         return 0;
1767 }
1768
1769 static void update_header_from_stateless_params(struct vicodec_ctx *ctx,
1770                                                 const struct v4l2_ctrl_fwht_params *params)
1771 {
1772         struct fwht_cframe_hdr *p_hdr = &ctx->state.header;
1773
1774         p_hdr->magic1 = FWHT_MAGIC1;
1775         p_hdr->magic2 = FWHT_MAGIC2;
1776         p_hdr->version = htonl(params->version);
1777         p_hdr->width = htonl(params->width);
1778         p_hdr->height = htonl(params->height);
1779         p_hdr->flags = htonl(params->flags);
1780         p_hdr->colorspace = htonl(params->colorspace);
1781         p_hdr->xfer_func = htonl(params->xfer_func);
1782         p_hdr->ycbcr_enc = htonl(params->ycbcr_enc);
1783         p_hdr->quantization = htonl(params->quantization);
1784 }
1785
1786 static int vicodec_s_ctrl(struct v4l2_ctrl *ctrl)
1787 {
1788         struct vicodec_ctx *ctx = container_of(ctrl->handler,
1789                                                struct vicodec_ctx, hdl);
1790         const struct v4l2_ctrl_fwht_params *params;
1791
1792         switch (ctrl->id) {
1793         case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
1794                 ctx->state.gop_size = ctrl->val;
1795                 return 0;
1796         case V4L2_CID_FWHT_I_FRAME_QP:
1797                 ctx->state.i_frame_qp = ctrl->val;
1798                 return 0;
1799         case V4L2_CID_FWHT_P_FRAME_QP:
1800                 ctx->state.p_frame_qp = ctrl->val;
1801                 return 0;
1802         case V4L2_CID_MPEG_VIDEO_FWHT_PARAMS:
1803                 params = ctrl->p_new.p_fwht_params;
1804                 update_header_from_stateless_params(ctx, params);
1805                 ctx->state.ref_frame_ts = params->backward_ref_ts;
1806                 return 0;
1807         }
1808         return -EINVAL;
1809 }
1810
1811 static const struct v4l2_ctrl_ops vicodec_ctrl_ops = {
1812         .s_ctrl = vicodec_s_ctrl,
1813         .try_ctrl = vicodec_try_ctrl,
1814 };
1815
1816 static const struct v4l2_ctrl_config vicodec_ctrl_stateless_state = {
1817         .ops            = &vicodec_ctrl_ops,
1818         .id             = V4L2_CID_MPEG_VIDEO_FWHT_PARAMS,
1819         .elem_size      = sizeof(struct v4l2_ctrl_fwht_params),
1820 };
1821
1822 /*
1823  * File operations
1824  */
1825 static int vicodec_open(struct file *file)
1826 {
1827         const struct v4l2_fwht_pixfmt_info *info = v4l2_fwht_get_pixfmt(0);
1828         struct video_device *vfd = video_devdata(file);
1829         struct vicodec_dev *dev = video_drvdata(file);
1830         struct vicodec_ctx *ctx = NULL;
1831         struct v4l2_ctrl_handler *hdl;
1832         unsigned int raw_size;
1833         unsigned int comp_size;
1834         int rc = 0;
1835
1836         if (mutex_lock_interruptible(vfd->lock))
1837                 return -ERESTARTSYS;
1838         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
1839         if (!ctx) {
1840                 rc = -ENOMEM;
1841                 goto open_unlock;
1842         }
1843
1844         if (vfd == &dev->stateful_enc.vfd)
1845                 ctx->is_enc = true;
1846         else if (vfd == &dev->stateless_dec.vfd)
1847                 ctx->is_stateless = true;
1848
1849         v4l2_fh_init(&ctx->fh, video_devdata(file));
1850         file->private_data = &ctx->fh;
1851         ctx->dev = dev;
1852         hdl = &ctx->hdl;
1853         v4l2_ctrl_handler_init(hdl, 5);
1854         v4l2_ctrl_new_std(hdl, &vicodec_ctrl_ops, V4L2_CID_MPEG_VIDEO_GOP_SIZE,
1855                           1, 16, 1, 10);
1856         v4l2_ctrl_new_std(hdl, &vicodec_ctrl_ops, V4L2_CID_FWHT_I_FRAME_QP,
1857                           1, 31, 1, 20);
1858         v4l2_ctrl_new_std(hdl, &vicodec_ctrl_ops, V4L2_CID_FWHT_P_FRAME_QP,
1859                           1, 31, 1, 20);
1860         if (ctx->is_enc)
1861                 v4l2_ctrl_new_std(hdl, &vicodec_ctrl_ops,
1862                                   V4L2_CID_MIN_BUFFERS_FOR_OUTPUT, 1, 1, 1, 1);
1863         if (ctx->is_stateless)
1864                 v4l2_ctrl_new_custom(hdl, &vicodec_ctrl_stateless_state, NULL);
1865         if (hdl->error) {
1866                 rc = hdl->error;
1867                 v4l2_ctrl_handler_free(hdl);
1868                 kfree(ctx);
1869                 goto open_unlock;
1870         }
1871         ctx->fh.ctrl_handler = hdl;
1872         v4l2_ctrl_handler_setup(hdl);
1873
1874         if (ctx->is_enc)
1875                 ctx->q_data[V4L2_M2M_SRC].info = info;
1876         else if (ctx->is_stateless)
1877                 ctx->q_data[V4L2_M2M_SRC].info = &pixfmt_stateless_fwht;
1878         else
1879                 ctx->q_data[V4L2_M2M_SRC].info = &pixfmt_fwht;
1880         ctx->q_data[V4L2_M2M_SRC].coded_width = 1280;
1881         ctx->q_data[V4L2_M2M_SRC].coded_height = 720;
1882         ctx->q_data[V4L2_M2M_SRC].visible_width = 1280;
1883         ctx->q_data[V4L2_M2M_SRC].visible_height = 720;
1884         raw_size = 1280 * 720 * info->sizeimage_mult / info->sizeimage_div;
1885         comp_size = 1280 * 720 * pixfmt_fwht.sizeimage_mult /
1886                                  pixfmt_fwht.sizeimage_div;
1887         if (ctx->is_enc)
1888                 ctx->q_data[V4L2_M2M_SRC].sizeimage = raw_size;
1889         else if (ctx->is_stateless)
1890                 ctx->q_data[V4L2_M2M_SRC].sizeimage = comp_size;
1891         else
1892                 ctx->q_data[V4L2_M2M_SRC].sizeimage =
1893                         comp_size + sizeof(struct fwht_cframe_hdr);
1894         ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC];
1895         if (ctx->is_enc) {
1896                 ctx->q_data[V4L2_M2M_DST].info = &pixfmt_fwht;
1897                 ctx->q_data[V4L2_M2M_DST].sizeimage =
1898                         comp_size + sizeof(struct fwht_cframe_hdr);
1899         } else {
1900                 ctx->q_data[V4L2_M2M_DST].info = info;
1901                 ctx->q_data[V4L2_M2M_DST].sizeimage = raw_size;
1902         }
1903
1904         ctx->state.colorspace = V4L2_COLORSPACE_REC709;
1905
1906         if (ctx->is_enc) {
1907                 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->stateful_enc.m2m_dev,
1908                                                     ctx, &queue_init);
1909                 ctx->lock = &dev->stateful_enc.lock;
1910         } else if (ctx->is_stateless) {
1911                 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->stateless_dec.m2m_dev,
1912                                                     ctx, &queue_init);
1913                 ctx->lock = &dev->stateless_dec.lock;
1914         } else {
1915                 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->stateful_dec.m2m_dev,
1916                                                     ctx, &queue_init);
1917                 ctx->lock = &dev->stateful_dec.lock;
1918         }
1919
1920         if (IS_ERR(ctx->fh.m2m_ctx)) {
1921                 rc = PTR_ERR(ctx->fh.m2m_ctx);
1922
1923                 v4l2_ctrl_handler_free(hdl);
1924                 v4l2_fh_exit(&ctx->fh);
1925                 kfree(ctx);
1926                 goto open_unlock;
1927         }
1928
1929         v4l2_fh_add(&ctx->fh);
1930
1931 open_unlock:
1932         mutex_unlock(vfd->lock);
1933         return rc;
1934 }
1935
1936 static int vicodec_release(struct file *file)
1937 {
1938         struct video_device *vfd = video_devdata(file);
1939         struct vicodec_ctx *ctx = file2ctx(file);
1940
1941         mutex_lock(vfd->lock);
1942         v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
1943         mutex_unlock(vfd->lock);
1944         v4l2_fh_del(&ctx->fh);
1945         v4l2_fh_exit(&ctx->fh);
1946         v4l2_ctrl_handler_free(&ctx->hdl);
1947         kvfree(ctx->state.compressed_frame);
1948         kfree(ctx);
1949
1950         return 0;
1951 }
1952
1953 static int vicodec_request_validate(struct media_request *req)
1954 {
1955         struct media_request_object *obj;
1956         struct v4l2_ctrl_handler *parent_hdl, *hdl;
1957         struct vicodec_ctx *ctx = NULL;
1958         struct v4l2_ctrl *ctrl;
1959         unsigned int count;
1960
1961         list_for_each_entry(obj, &req->objects, list) {
1962                 struct vb2_buffer *vb;
1963
1964                 if (vb2_request_object_is_buffer(obj)) {
1965                         vb = container_of(obj, struct vb2_buffer, req_obj);
1966                         ctx = vb2_get_drv_priv(vb->vb2_queue);
1967
1968                         break;
1969                 }
1970         }
1971
1972         if (!ctx) {
1973                 pr_err("No buffer was provided with the request\n");
1974                 return -ENOENT;
1975         }
1976
1977         count = vb2_request_buffer_cnt(req);
1978         if (!count) {
1979                 v4l2_info(&ctx->dev->v4l2_dev,
1980                           "No buffer was provided with the request\n");
1981                 return -ENOENT;
1982         } else if (count > 1) {
1983                 v4l2_info(&ctx->dev->v4l2_dev,
1984                           "More than one buffer was provided with the request\n");
1985                 return -EINVAL;
1986         }
1987
1988         parent_hdl = &ctx->hdl;
1989
1990         hdl = v4l2_ctrl_request_hdl_find(req, parent_hdl);
1991         if (!hdl) {
1992                 v4l2_info(&ctx->dev->v4l2_dev, "Missing codec control\n");
1993                 return -ENOENT;
1994         }
1995         ctrl = v4l2_ctrl_request_hdl_ctrl_find(hdl,
1996                                                vicodec_ctrl_stateless_state.id);
1997         v4l2_ctrl_request_hdl_put(hdl);
1998         if (!ctrl) {
1999                 v4l2_info(&ctx->dev->v4l2_dev,
2000                           "Missing required codec control\n");
2001                 return -ENOENT;
2002         }
2003
2004         return vb2_request_validate(req);
2005 }
2006
2007 static const struct v4l2_file_operations vicodec_fops = {
2008         .owner          = THIS_MODULE,
2009         .open           = vicodec_open,
2010         .release        = vicodec_release,
2011         .poll           = v4l2_m2m_fop_poll,
2012         .unlocked_ioctl = video_ioctl2,
2013         .mmap           = v4l2_m2m_fop_mmap,
2014 };
2015
2016 static const struct video_device vicodec_videodev = {
2017         .name           = VICODEC_NAME,
2018         .vfl_dir        = VFL_DIR_M2M,
2019         .fops           = &vicodec_fops,
2020         .ioctl_ops      = &vicodec_ioctl_ops,
2021         .minor          = -1,
2022         .release        = video_device_release_empty,
2023 };
2024
2025 static const struct media_device_ops vicodec_m2m_media_ops = {
2026         .req_validate   = vicodec_request_validate,
2027         .req_queue      = v4l2_m2m_request_queue,
2028 };
2029
2030 static const struct v4l2_m2m_ops m2m_ops = {
2031         .device_run     = device_run,
2032         .job_ready      = job_ready,
2033 };
2034
2035 static int register_instance(struct vicodec_dev *dev,
2036                              struct vicodec_dev_instance *dev_instance,
2037                              const char *name, bool is_enc)
2038 {
2039         struct video_device *vfd;
2040         int ret;
2041
2042         spin_lock_init(&dev_instance->lock);
2043         mutex_init(&dev_instance->mutex);
2044         dev_instance->m2m_dev = v4l2_m2m_init(&m2m_ops);
2045         if (IS_ERR(dev_instance->m2m_dev)) {
2046                 v4l2_err(&dev->v4l2_dev, "Failed to init vicodec enc device\n");
2047                 return PTR_ERR(dev_instance->m2m_dev);
2048         }
2049
2050         dev_instance->vfd = vicodec_videodev;
2051         vfd = &dev_instance->vfd;
2052         vfd->lock = &dev_instance->mutex;
2053         vfd->v4l2_dev = &dev->v4l2_dev;
2054         strscpy(vfd->name, name, sizeof(vfd->name));
2055         vfd->device_caps = V4L2_CAP_STREAMING |
2056                 (multiplanar ? V4L2_CAP_VIDEO_M2M_MPLANE : V4L2_CAP_VIDEO_M2M);
2057         if (is_enc) {
2058                 v4l2_disable_ioctl(vfd, VIDIOC_DECODER_CMD);
2059                 v4l2_disable_ioctl(vfd, VIDIOC_TRY_DECODER_CMD);
2060         } else {
2061                 v4l2_disable_ioctl(vfd, VIDIOC_ENCODER_CMD);
2062                 v4l2_disable_ioctl(vfd, VIDIOC_TRY_ENCODER_CMD);
2063         }
2064         video_set_drvdata(vfd, dev);
2065
2066         ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);
2067         if (ret) {
2068                 v4l2_err(&dev->v4l2_dev, "Failed to register video device '%s'\n", name);
2069                 v4l2_m2m_release(dev_instance->m2m_dev);
2070                 return ret;
2071         }
2072         v4l2_info(&dev->v4l2_dev, "Device '%s' registered as /dev/video%d\n",
2073                   name, vfd->num);
2074         return 0;
2075 }
2076
2077 static void vicodec_v4l2_dev_release(struct v4l2_device *v4l2_dev)
2078 {
2079         struct vicodec_dev *dev = container_of(v4l2_dev, struct vicodec_dev, v4l2_dev);
2080
2081         v4l2_device_unregister(&dev->v4l2_dev);
2082         v4l2_m2m_release(dev->stateful_enc.m2m_dev);
2083         v4l2_m2m_release(dev->stateful_dec.m2m_dev);
2084         v4l2_m2m_release(dev->stateless_dec.m2m_dev);
2085 #ifdef CONFIG_MEDIA_CONTROLLER
2086         media_device_cleanup(&dev->mdev);
2087 #endif
2088         kfree(dev);
2089 }
2090
2091 static int vicodec_probe(struct platform_device *pdev)
2092 {
2093         struct vicodec_dev *dev;
2094         int ret;
2095
2096         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2097         if (!dev)
2098                 return -ENOMEM;
2099
2100         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
2101         if (ret)
2102                 goto free_dev;
2103
2104         dev->v4l2_dev.release = vicodec_v4l2_dev_release;
2105
2106 #ifdef CONFIG_MEDIA_CONTROLLER
2107         dev->mdev.dev = &pdev->dev;
2108         strscpy(dev->mdev.model, "vicodec", sizeof(dev->mdev.model));
2109         strscpy(dev->mdev.bus_info, "platform:vicodec",
2110                 sizeof(dev->mdev.bus_info));
2111         media_device_init(&dev->mdev);
2112         dev->mdev.ops = &vicodec_m2m_media_ops;
2113         dev->v4l2_dev.mdev = &dev->mdev;
2114 #endif
2115
2116         platform_set_drvdata(pdev, dev);
2117
2118         ret = register_instance(dev, &dev->stateful_enc, "stateful-encoder",
2119                                 true);
2120         if (ret)
2121                 goto unreg_dev;
2122
2123         ret = register_instance(dev, &dev->stateful_dec, "stateful-decoder",
2124                                 false);
2125         if (ret)
2126                 goto unreg_sf_enc;
2127
2128         ret = register_instance(dev, &dev->stateless_dec, "stateless-decoder",
2129                                 false);
2130         if (ret)
2131                 goto unreg_sf_dec;
2132
2133 #ifdef CONFIG_MEDIA_CONTROLLER
2134         ret = v4l2_m2m_register_media_controller(dev->stateful_enc.m2m_dev,
2135                                                  &dev->stateful_enc.vfd,
2136                                                  MEDIA_ENT_F_PROC_VIDEO_ENCODER);
2137         if (ret) {
2138                 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller for enc\n");
2139                 goto unreg_m2m;
2140         }
2141
2142         ret = v4l2_m2m_register_media_controller(dev->stateful_dec.m2m_dev,
2143                                                  &dev->stateful_dec.vfd,
2144                                                  MEDIA_ENT_F_PROC_VIDEO_DECODER);
2145         if (ret) {
2146                 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller for dec\n");
2147                 goto unreg_m2m_sf_enc_mc;
2148         }
2149
2150         ret = v4l2_m2m_register_media_controller(dev->stateless_dec.m2m_dev,
2151                                                  &dev->stateless_dec.vfd,
2152                                                  MEDIA_ENT_F_PROC_VIDEO_DECODER);
2153         if (ret) {
2154                 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller for stateless dec\n");
2155                 goto unreg_m2m_sf_dec_mc;
2156         }
2157
2158         ret = media_device_register(&dev->mdev);
2159         if (ret) {
2160                 v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n");
2161                 goto unreg_m2m_sl_dec_mc;
2162         }
2163 #endif
2164         return 0;
2165
2166 #ifdef CONFIG_MEDIA_CONTROLLER
2167 unreg_m2m_sl_dec_mc:
2168         v4l2_m2m_unregister_media_controller(dev->stateless_dec.m2m_dev);
2169 unreg_m2m_sf_dec_mc:
2170         v4l2_m2m_unregister_media_controller(dev->stateful_dec.m2m_dev);
2171 unreg_m2m_sf_enc_mc:
2172         v4l2_m2m_unregister_media_controller(dev->stateful_enc.m2m_dev);
2173 unreg_m2m:
2174         video_unregister_device(&dev->stateless_dec.vfd);
2175         v4l2_m2m_release(dev->stateless_dec.m2m_dev);
2176 #endif
2177 unreg_sf_dec:
2178         video_unregister_device(&dev->stateful_dec.vfd);
2179         v4l2_m2m_release(dev->stateful_dec.m2m_dev);
2180 unreg_sf_enc:
2181         video_unregister_device(&dev->stateful_enc.vfd);
2182         v4l2_m2m_release(dev->stateful_enc.m2m_dev);
2183 unreg_dev:
2184         v4l2_device_unregister(&dev->v4l2_dev);
2185 free_dev:
2186         kfree(dev);
2187
2188         return ret;
2189 }
2190
2191 static int vicodec_remove(struct platform_device *pdev)
2192 {
2193         struct vicodec_dev *dev = platform_get_drvdata(pdev);
2194
2195         v4l2_info(&dev->v4l2_dev, "Removing " VICODEC_NAME);
2196
2197 #ifdef CONFIG_MEDIA_CONTROLLER
2198         media_device_unregister(&dev->mdev);
2199         v4l2_m2m_unregister_media_controller(dev->stateful_enc.m2m_dev);
2200         v4l2_m2m_unregister_media_controller(dev->stateful_dec.m2m_dev);
2201         v4l2_m2m_unregister_media_controller(dev->stateless_dec.m2m_dev);
2202 #endif
2203
2204         video_unregister_device(&dev->stateful_enc.vfd);
2205         video_unregister_device(&dev->stateful_dec.vfd);
2206         video_unregister_device(&dev->stateless_dec.vfd);
2207         v4l2_device_put(&dev->v4l2_dev);
2208
2209         return 0;
2210 }
2211
2212 static struct platform_driver vicodec_pdrv = {
2213         .probe          = vicodec_probe,
2214         .remove         = vicodec_remove,
2215         .driver         = {
2216                 .name   = VICODEC_NAME,
2217         },
2218 };
2219
2220 static void __exit vicodec_exit(void)
2221 {
2222         platform_driver_unregister(&vicodec_pdrv);
2223         platform_device_unregister(&vicodec_pdev);
2224 }
2225
2226 static int __init vicodec_init(void)
2227 {
2228         int ret;
2229
2230         ret = platform_device_register(&vicodec_pdev);
2231         if (ret)
2232                 return ret;
2233
2234         ret = platform_driver_register(&vicodec_pdrv);
2235         if (ret)
2236                 platform_device_unregister(&vicodec_pdev);
2237
2238         return ret;
2239 }
2240
2241 module_init(vicodec_init);
2242 module_exit(vicodec_exit);