drivers/media/v4l2-core/v4l2-subdev.c

   1 /*
   2  * V4L2 sub-device
   3  *
   4  * Copyright (C) 2010 Nokia Corporation
   5  *
   6  * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
   7  *          Sakari Ailus <sakari.ailus@iki.fi>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include <linux/ioctl.h>
  24 #include <linux/slab.h>
  25 #include <linux/types.h>
  26 #include <linux/videodev2.h>
  27 #include <linux/export.h>
  28
  29 #include <media/v4l2-ctrls.h>
  30 #include <media/v4l2-device.h>
  31 #include <media/v4l2-ioctl.h>
  32 #include <media/v4l2-fh.h>
  33 #include <media/v4l2-event.h>
  34
  35 static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd)
  36 {
  37 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
  38         if (sd->entity.num_pads) {
  39                 fh->pad = v4l2_subdev_alloc_pad_config(sd);
  40                 if (fh->pad == NULL)
  41                         return -ENOMEM;
  42         }
  43 #endif
  44         return 0;
  45 }
  46
  47 static void subdev_fh_free(struct v4l2_subdev_fh *fh)
  48 {
  49 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
  50         v4l2_subdev_free_pad_config(fh->pad);
  51         fh->pad = NULL;
  52 #endif
  53 }
  54
  55 static int subdev_open(struct file *file)
  56 {
  57         struct video_device *vdev = video_devdata(file);
  58         struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
  59         struct v4l2_subdev_fh *subdev_fh;
  60 #if defined(CONFIG_MEDIA_CONTROLLER)
  61         struct media_entity *entity = NULL;
  62 #endif
  63         int ret;
  64
  65         subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
  66         if (subdev_fh == NULL)
  67                 return -ENOMEM;
  68
  69         ret = subdev_fh_init(subdev_fh, sd);
  70         if (ret) {
  71                 kfree(subdev_fh);
  72                 return ret;
  73         }
  74
  75         v4l2_fh_init(&subdev_fh->vfh, vdev);
  76         v4l2_fh_add(&subdev_fh->vfh);
  77         file->private_data = &subdev_fh->vfh;
  78 #if defined(CONFIG_MEDIA_CONTROLLER)
  79         if (sd->v4l2_dev->mdev) {
  80                 entity = media_entity_get(&sd->entity);
  81                 if (!entity) {
  82                         ret = -EBUSY;
  83                         goto err;
  84                 }
  85         }
  86 #endif
  87
  88         if (sd->internal_ops && sd->internal_ops->open) {
  89                 ret = sd->internal_ops->open(sd, subdev_fh);
  90                 if (ret < 0)
  91                         goto err;
  92         }
  93
  94         return 0;
  95
  96 err:
  97 #if defined(CONFIG_MEDIA_CONTROLLER)
  98         media_entity_put(entity);
  99 #endif
 100         v4l2_fh_del(&subdev_fh->vfh);
 101         v4l2_fh_exit(&subdev_fh->vfh);
 102         subdev_fh_free(subdev_fh);
 103         kfree(subdev_fh);
 104
 105         return ret;
 106 }
 107
 108 static int subdev_close(struct file *file)
 109 {
 110         struct video_device *vdev = video_devdata(file);
 111         struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
 112         struct v4l2_fh *vfh = file->private_data;
 113         struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
 114
 115         if (sd->internal_ops && sd->internal_ops->close)
 116                 sd->internal_ops->close(sd, subdev_fh);
 117 #if defined(CONFIG_MEDIA_CONTROLLER)
 118         if (sd->v4l2_dev->mdev)
 119                 media_entity_put(&sd->entity);
 120 #endif
 121         v4l2_fh_del(vfh);
 122         v4l2_fh_exit(vfh);
 123         subdev_fh_free(subdev_fh);
 124         kfree(subdev_fh);
 125         file->private_data = NULL;
 126
 127         return 0;
 128 }
 129
 130 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
 131 static int check_format(struct v4l2_subdev *sd,
 132                         struct v4l2_subdev_format *format)
 133 {
 134         if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
 135             format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
 136                 return -EINVAL;
 137
 138         if (format->pad >= sd->entity.num_pads)
 139                 return -EINVAL;
 140
 141         return 0;
 142 }
 143
 144 static int check_crop(struct v4l2_subdev *sd, struct v4l2_subdev_crop *crop)
 145 {
 146         if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
 147             crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
 148                 return -EINVAL;
 149
 150         if (crop->pad >= sd->entity.num_pads)
 151                 return -EINVAL;
 152
 153         return 0;
 154 }
 155
 156 static int check_selection(struct v4l2_subdev *sd,
 157                            struct v4l2_subdev_selection *sel)
 158 {
 159         if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
 160             sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
 161                 return -EINVAL;
 162
 163         if (sel->pad >= sd->entity.num_pads)
 164                 return -EINVAL;
 165
 166         return 0;
 167 }
 168
 169 static int check_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
 170 {
 171         if (edid->pad >= sd->entity.num_pads)
 172                 return -EINVAL;
 173
 174         if (edid->blocks && edid->edid == NULL)
 175                 return -EINVAL;
 176
 177         return 0;
 178 }
 179 #endif
 180
 181 static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
 182 {
 183         struct video_device *vdev = video_devdata(file);
 184         struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
 185         struct v4l2_fh *vfh = file->private_data;
 186 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
 187         struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
 188         int rval;
 189 #endif
 190
 191         switch (cmd) {
 192         case VIDIOC_QUERYCTRL:
 193                 return v4l2_queryctrl(vfh->ctrl_handler, arg);
 194
 195         case VIDIOC_QUERY_EXT_CTRL:
 196                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);
 197
 198         case VIDIOC_QUERYMENU:
 199                 return v4l2_querymenu(vfh->ctrl_handler, arg);
 200
 201         case VIDIOC_G_CTRL:
 202                 return v4l2_g_ctrl(vfh->ctrl_handler, arg);
 203
 204         case VIDIOC_S_CTRL:
 205                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
 206
 207         case VIDIOC_G_EXT_CTRLS:
 208                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
 209
 210         case VIDIOC_S_EXT_CTRLS:
 211                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
 212
 213         case VIDIOC_TRY_EXT_CTRLS:
 214                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
 215
 216         case VIDIOC_DQEVENT:
 217                 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
 218                         return -ENOIOCTLCMD;
 219
 220                 return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
 221
 222         case VIDIOC_SUBSCRIBE_EVENT:
 223                 return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
 224
 225         case VIDIOC_UNSUBSCRIBE_EVENT:
 226                 return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
 227
 228 #ifdef CONFIG_VIDEO_ADV_DEBUG
 229         case VIDIOC_DBG_G_REGISTER:
 230         {
 231                 struct v4l2_dbg_register *p = arg;
 232
 233                 if (!capable(CAP_SYS_ADMIN))
 234                         return -EPERM;
 235                 return v4l2_subdev_call(sd, core, g_register, p);
 236         }
 237         case VIDIOC_DBG_S_REGISTER:
 238         {
 239                 struct v4l2_dbg_register *p = arg;
 240
 241                 if (!capable(CAP_SYS_ADMIN))
 242                         return -EPERM;
 243                 return v4l2_subdev_call(sd, core, s_register, p);
 244         }
 245 #endif
 246
 247         case VIDIOC_LOG_STATUS: {
 248                 int ret;
 249
 250                 pr_info("%s: =================  START STATUS  =================\n",
 251                         sd->name);
 252                 ret = v4l2_subdev_call(sd, core, log_status);
 253                 pr_info("%s: ==================  END STATUS  ==================\n",
 254                         sd->name);
 255                 return ret;
 256         }
 257
 258 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
 259         case VIDIOC_SUBDEV_G_FMT: {
 260                 struct v4l2_subdev_format *format = arg;
 261
 262                 rval = check_format(sd, format);
 263                 if (rval)
 264                         return rval;
 265
 266                 return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh->pad, format);
 267         }
 268
 269         case VIDIOC_SUBDEV_S_FMT: {
 270                 struct v4l2_subdev_format *format = arg;
 271
 272                 rval = check_format(sd, format);
 273                 if (rval)
 274                         return rval;
 275
 276                 return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh->pad, format);
 277         }
 278
 279         case VIDIOC_SUBDEV_G_CROP: {
 280                 struct v4l2_subdev_crop *crop = arg;
 281                 struct v4l2_subdev_selection sel;
 282
 283                 rval = check_crop(sd, crop);
 284                 if (rval)
 285                         return rval;
 286
 287                 memset(&sel, 0, sizeof(sel));
 288                 sel.which = crop->which;
 289                 sel.pad = crop->pad;
 290                 sel.target = V4L2_SEL_TGT_CROP;
 291
 292                 rval = v4l2_subdev_call(
 293                         sd, pad, get_selection, subdev_fh->pad, &sel);
 294
 295                 crop->rect = sel.r;
 296
 297                 return rval;
 298         }
 299
 300         case VIDIOC_SUBDEV_S_CROP: {
 301                 struct v4l2_subdev_crop *crop = arg;
 302                 struct v4l2_subdev_selection sel;
 303
 304                 rval = check_crop(sd, crop);
 305                 if (rval)
 306                         return rval;
 307
 308                 memset(&sel, 0, sizeof(sel));
 309                 sel.which = crop->which;
 310                 sel.pad = crop->pad;
 311                 sel.target = V4L2_SEL_TGT_CROP;
 312                 sel.r = crop->rect;
 313
 314                 rval = v4l2_subdev_call(
 315                         sd, pad, set_selection, subdev_fh->pad, &sel);
 316
 317                 crop->rect = sel.r;
 318
 319                 return rval;
 320         }
 321
 322         case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
 323                 struct v4l2_subdev_mbus_code_enum *code = arg;
 324
 325                 if (code->which != V4L2_SUBDEV_FORMAT_TRY &&
 326                     code->which != V4L2_SUBDEV_FORMAT_ACTIVE)
 327                         return -EINVAL;
 328
 329                 if (code->pad >= sd->entity.num_pads)
 330                         return -EINVAL;
 331
 332                 return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh->pad,
 333                                         code);
 334         }
 335
 336         case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
 337                 struct v4l2_subdev_frame_size_enum *fse = arg;
 338
 339                 if (fse->which != V4L2_SUBDEV_FORMAT_TRY &&
 340                     fse->which != V4L2_SUBDEV_FORMAT_ACTIVE)
 341                         return -EINVAL;
 342
 343                 if (fse->pad >= sd->entity.num_pads)
 344                         return -EINVAL;
 345
 346                 return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh->pad,
 347                                         fse);
 348         }
 349
 350         case VIDIOC_SUBDEV_G_FRAME_INTERVAL: {
 351                 struct v4l2_subdev_frame_interval *fi = arg;
 352
 353                 if (fi->pad >= sd->entity.num_pads)
 354                         return -EINVAL;
 355
 356                 return v4l2_subdev_call(sd, video, g_frame_interval, arg);
 357         }
 358
 359         case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
 360                 struct v4l2_subdev_frame_interval *fi = arg;
 361
 362                 if (fi->pad >= sd->entity.num_pads)
 363                         return -EINVAL;
 364
 365                 return v4l2_subdev_call(sd, video, s_frame_interval, arg);
 366         }
 367
 368         case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
 369                 struct v4l2_subdev_frame_interval_enum *fie = arg;
 370
 371                 if (fie->which != V4L2_SUBDEV_FORMAT_TRY &&
 372                     fie->which != V4L2_SUBDEV_FORMAT_ACTIVE)
 373                         return -EINVAL;
 374
 375                 if (fie->pad >= sd->entity.num_pads)
 376                         return -EINVAL;
 377
 378                 return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad,
 379                                         fie);
 380         }
 381
 382         case VIDIOC_SUBDEV_G_SELECTION: {
 383                 struct v4l2_subdev_selection *sel = arg;
 384
 385                 rval = check_selection(sd, sel);
 386                 if (rval)
 387                         return rval;
 388
 389                 return v4l2_subdev_call(
 390                         sd, pad, get_selection, subdev_fh->pad, sel);
 391         }
 392
 393         case VIDIOC_SUBDEV_S_SELECTION: {
 394                 struct v4l2_subdev_selection *sel = arg;
 395
 396                 rval = check_selection(sd, sel);
 397                 if (rval)
 398                         return rval;
 399
 400                 return v4l2_subdev_call(
 401                         sd, pad, set_selection, subdev_fh->pad, sel);
 402         }
 403
 404         case VIDIOC_G_EDID: {
 405                 struct v4l2_subdev_edid *edid = arg;
 406
 407                 rval = check_edid(sd, edid);
 408                 if (rval)
 409                         return rval;
 410
 411                 return v4l2_subdev_call(sd, pad, get_edid, edid);
 412         }
 413
 414         case VIDIOC_S_EDID: {
 415                 struct v4l2_subdev_edid *edid = arg;
 416
 417                 rval = check_edid(sd, edid);
 418                 if (rval)
 419                         return rval;
 420
 421                 return v4l2_subdev_call(sd, pad, set_edid, edid);
 422         }
 423
 424         case VIDIOC_SUBDEV_DV_TIMINGS_CAP: {
 425                 struct v4l2_dv_timings_cap *cap = arg;
 426
 427                 if (cap->pad >= sd->entity.num_pads)
 428                         return -EINVAL;
 429
 430                 return v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
 431         }
 432
 433         case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: {
 434                 struct v4l2_enum_dv_timings *dvt = arg;
 435
 436                 if (dvt->pad >= sd->entity.num_pads)
 437                         return -EINVAL;
 438
 439                 return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt);
 440         }
 441
 442         case VIDIOC_SUBDEV_QUERY_DV_TIMINGS:
 443                 return v4l2_subdev_call(sd, video, query_dv_timings, arg);
 444
 445         case VIDIOC_SUBDEV_G_DV_TIMINGS:
 446                 return v4l2_subdev_call(sd, video, g_dv_timings, arg);
 447
 448         case VIDIOC_SUBDEV_S_DV_TIMINGS:
 449                 return v4l2_subdev_call(sd, video, s_dv_timings, arg);
 450 #endif
 451         default:
 452                 return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
 453         }
 454
 455         return 0;
 456 }
 457
 458 static long subdev_ioctl(struct file *file, unsigned int cmd,
 459         unsigned long arg)
 460 {
 461         return video_usercopy(file, cmd, arg, subdev_do_ioctl);
 462 }
 463
 464 #ifdef CONFIG_COMPAT
 465 static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
 466         unsigned long arg)
 467 {
 468         struct video_device *vdev = video_devdata(file);
 469         struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
 470
 471         return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg);
 472 }
 473 #endif
 474
 475 static unsigned int subdev_poll(struct file *file, poll_table *wait)
 476 {
 477         struct video_device *vdev = video_devdata(file);
 478         struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
 479         struct v4l2_fh *fh = file->private_data;
 480
 481         if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
 482                 return POLLERR;
 483
 484         poll_wait(file, &fh->wait, wait);
 485
 486         if (v4l2_event_pending(fh))
 487                 return POLLPRI;
 488
 489         return 0;
 490 }
 491
 492 const struct v4l2_file_operations v4l2_subdev_fops = {
 493         .owner = THIS_MODULE,
 494         .open = subdev_open,
 495         .unlocked_ioctl = subdev_ioctl,
 496 #ifdef CONFIG_COMPAT
 497         .compat_ioctl32 = subdev_compat_ioctl32,
 498 #endif
 499         .release = subdev_close,
 500         .poll = subdev_poll,
 501 };
 502
 503 #ifdef CONFIG_MEDIA_CONTROLLER
 504 int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
 505                                       struct media_link *link,
 506                                       struct v4l2_subdev_format *source_fmt,
 507                                       struct v4l2_subdev_format *sink_fmt)
 508 {
 509         /* The width, height and code must match. */
 510         if (source_fmt->format.width != sink_fmt->format.width
 511             || source_fmt->format.height != sink_fmt->format.height
 512             || source_fmt->format.code != sink_fmt->format.code)
 513                 return -EPIPE;
 514
 515         /* The field order must match, or the sink field order must be NONE
 516          * to support interlaced hardware connected to bridges that support
 517          * progressive formats only.
 518          */
 519         if (source_fmt->format.field != sink_fmt->format.field &&
 520             sink_fmt->format.field != V4L2_FIELD_NONE)
 521                 return -EPIPE;
 522
 523         return 0;
 524 }
 525 EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default);
 526
 527 static int
 528 v4l2_subdev_link_validate_get_format(struct media_pad *pad,
 529                                      struct v4l2_subdev_format *fmt)
 530 {
 531         if (is_media_entity_v4l2_subdev(pad->entity)) {
 532                 struct v4l2_subdev *sd =
 533                         media_entity_to_v4l2_subdev(pad->entity);
 534
 535                 fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
 536                 fmt->pad = pad->index;
 537                 return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
 538         }
 539
 540         WARN(pad->entity->function != MEDIA_ENT_F_IO_V4L,
 541              "Driver bug! Wrong media entity type 0x%08x, entity %s\n",
 542              pad->entity->function, pad->entity->name);
 543
 544         return -EINVAL;
 545 }
 546
 547 int v4l2_subdev_link_validate(struct media_link *link)
 548 {
 549         struct v4l2_subdev *sink;
 550         struct v4l2_subdev_format sink_fmt, source_fmt;
 551         int rval;
 552
 553         rval = v4l2_subdev_link_validate_get_format(
 554                 link->source, &source_fmt);
 555         if (rval < 0)
 556                 return 0;
 557
 558         rval = v4l2_subdev_link_validate_get_format(
 559                 link->sink, &sink_fmt);
 560         if (rval < 0)
 561                 return 0;
 562
 563         sink = media_entity_to_v4l2_subdev(link->sink->entity);
 564
 565         rval = v4l2_subdev_call(sink, pad, link_validate, link,
 566                                 &source_fmt, &sink_fmt);
 567         if (rval != -ENOIOCTLCMD)
 568                 return rval;
 569
 570         return v4l2_subdev_link_validate_default(
 571                 sink, link, &source_fmt, &sink_fmt);
 572 }
 573 EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
 574
 575 struct v4l2_subdev_pad_config *
 576 v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd)
 577 {
 578         struct v4l2_subdev_pad_config *cfg;
 579         int ret;
 580
 581         if (!sd->entity.num_pads)
 582                 return NULL;
 583
 584         cfg = kcalloc(sd->entity.num_pads, sizeof(*cfg), GFP_KERNEL);
 585         if (!cfg)
 586                 return NULL;
 587
 588         ret = v4l2_subdev_call(sd, pad, init_cfg, cfg);
 589         if (ret < 0 && ret != -ENOIOCTLCMD) {
 590                 kfree(cfg);
 591                 return NULL;
 592         }
 593
 594         return cfg;
 595 }
 596 EXPORT_SYMBOL_GPL(v4l2_subdev_alloc_pad_config);
 597
 598 void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg)
 599 {
 600         kfree(cfg);
 601 }
 602 EXPORT_SYMBOL_GPL(v4l2_subdev_free_pad_config);
 603 #endif /* CONFIG_MEDIA_CONTROLLER */
 604
 605 void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
 606 {
 607         INIT_LIST_HEAD(&sd->list);
 608         BUG_ON(!ops);
 609         sd->ops = ops;
 610         sd->v4l2_dev = NULL;
 611         sd->flags = 0;
 612         sd->name[0] = '\0';
 613         sd->grp_id = 0;
 614         sd->dev_priv = NULL;
 615         sd->host_priv = NULL;
 616 #if defined(CONFIG_MEDIA_CONTROLLER)
 617         sd->entity.name = sd->name;
 618         sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV;
 619         sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
 620 #endif
 621 }
 622 EXPORT_SYMBOL(v4l2_subdev_init);
 623
 624 void v4l2_subdev_notify_event(struct v4l2_subdev *sd,
 625                               const struct v4l2_event *ev)
 626 {
 627         v4l2_event_queue(sd->devnode, ev);
 628         v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT, (void *)ev);
 629 }
 630 EXPORT_SYMBOL_GPL(v4l2_subdev_notify_event);