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 19 #include <linux/ioctl.h> 20 #include <linux/mm.h> 21 #include <linux/slab.h> 22 #include <linux/types.h> 23 #include <linux/videodev2.h> 24 #include <linux/export.h> 25 26 #include <media/v4l2-ctrls.h> 27 #include <media/v4l2-device.h> 28 #include <media/v4l2-ioctl.h> 29 #include <media/v4l2-fh.h> 30 #include <media/v4l2-event.h> 31 32 static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd) 33 { 34 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 35 if (sd->entity.num_pads) { 36 fh->pad = v4l2_subdev_alloc_pad_config(sd); 37 if (fh->pad == NULL) 38 return -ENOMEM; 39 } 40 #endif 41 return 0; 42 } 43 44 static void subdev_fh_free(struct v4l2_subdev_fh *fh) 45 { 46 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 47 v4l2_subdev_free_pad_config(fh->pad); 48 fh->pad = NULL; 49 #endif 50 } 51 52 static int subdev_open(struct file *file) 53 { 54 struct video_device *vdev = video_devdata(file); 55 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); 56 struct v4l2_subdev_fh *subdev_fh; 57 #if defined(CONFIG_MEDIA_CONTROLLER) 58 struct media_entity *entity = NULL; 59 #endif 60 int ret; 61 62 subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL); 63 if (subdev_fh == NULL) 64 return -ENOMEM; 65 66 ret = subdev_fh_init(subdev_fh, sd); 67 if (ret) { 68 kfree(subdev_fh); 69 return ret; 70 } 71 72 v4l2_fh_init(&subdev_fh->vfh, vdev); 73 v4l2_fh_add(&subdev_fh->vfh); 74 file->private_data = &subdev_fh->vfh; 75 #if defined(CONFIG_MEDIA_CONTROLLER) 76 if (sd->v4l2_dev->mdev) { 77 entity = media_entity_get(&sd->entity); 78 if (!entity) { 79 ret = -EBUSY; 80 goto err; 81 } 82 } 83 #endif 84 85 if (sd->internal_ops && sd->internal_ops->open) { 86 ret = sd->internal_ops->open(sd, subdev_fh); 87 if (ret < 0) 88 goto err; 89 } 90 91 return 0; 92 93 err: 94 #if defined(CONFIG_MEDIA_CONTROLLER) 95 media_entity_put(entity); 96 #endif 97 v4l2_fh_del(&subdev_fh->vfh); 98 v4l2_fh_exit(&subdev_fh->vfh); 99 subdev_fh_free(subdev_fh); 100 kfree(subdev_fh); 101 102 return ret; 103 } 104 105 static int subdev_close(struct file *file) 106 { 107 struct video_device *vdev = video_devdata(file); 108 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); 109 struct v4l2_fh *vfh = file->private_data; 110 struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); 111 112 if (sd->internal_ops && sd->internal_ops->close) 113 sd->internal_ops->close(sd, subdev_fh); 114 #if defined(CONFIG_MEDIA_CONTROLLER) 115 if (sd->v4l2_dev->mdev) 116 media_entity_put(&sd->entity); 117 #endif 118 v4l2_fh_del(vfh); 119 v4l2_fh_exit(vfh); 120 subdev_fh_free(subdev_fh); 121 kfree(subdev_fh); 122 file->private_data = NULL; 123 124 return 0; 125 } 126 127 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 128 static int check_format(struct v4l2_subdev *sd, 129 struct v4l2_subdev_format *format) 130 { 131 if (format->which != V4L2_SUBDEV_FORMAT_TRY && 132 format->which != V4L2_SUBDEV_FORMAT_ACTIVE) 133 return -EINVAL; 134 135 if (format->pad >= sd->entity.num_pads) 136 return -EINVAL; 137 138 return 0; 139 } 140 141 static int check_crop(struct v4l2_subdev *sd, struct v4l2_subdev_crop *crop) 142 { 143 if (crop->which != V4L2_SUBDEV_FORMAT_TRY && 144 crop->which != V4L2_SUBDEV_FORMAT_ACTIVE) 145 return -EINVAL; 146 147 if (crop->pad >= sd->entity.num_pads) 148 return -EINVAL; 149 150 return 0; 151 } 152 153 static int check_selection(struct v4l2_subdev *sd, 154 struct v4l2_subdev_selection *sel) 155 { 156 if (sel->which != V4L2_SUBDEV_FORMAT_TRY && 157 sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) 158 return -EINVAL; 159 160 if (sel->pad >= sd->entity.num_pads) 161 return -EINVAL; 162 163 return 0; 164 } 165 166 static int check_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid) 167 { 168 if (edid->pad >= sd->entity.num_pads) 169 return -EINVAL; 170 171 if (edid->blocks && edid->edid == NULL) 172 return -EINVAL; 173 174 return 0; 175 } 176 #endif 177 178 static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) 179 { 180 struct video_device *vdev = video_devdata(file); 181 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); 182 struct v4l2_fh *vfh = file->private_data; 183 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 184 struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); 185 int rval; 186 #endif 187 188 switch (cmd) { 189 case VIDIOC_QUERYCTRL: 190 /* 191 * TODO: this really should be folded into v4l2_queryctrl (this 192 * currently returns -EINVAL for NULL control handlers). 193 * However, v4l2_queryctrl() is still called directly by 194 * drivers as well and until that has been addressed I believe 195 * it is safer to do the check here. The same is true for the 196 * other control ioctls below. 197 */ 198 if (!vfh->ctrl_handler) 199 return -ENOTTY; 200 return v4l2_queryctrl(vfh->ctrl_handler, arg); 201 202 case VIDIOC_QUERY_EXT_CTRL: 203 if (!vfh->ctrl_handler) 204 return -ENOTTY; 205 return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg); 206 207 case VIDIOC_QUERYMENU: 208 if (!vfh->ctrl_handler) 209 return -ENOTTY; 210 return v4l2_querymenu(vfh->ctrl_handler, arg); 211 212 case VIDIOC_G_CTRL: 213 if (!vfh->ctrl_handler) 214 return -ENOTTY; 215 return v4l2_g_ctrl(vfh->ctrl_handler, arg); 216 217 case VIDIOC_S_CTRL: 218 if (!vfh->ctrl_handler) 219 return -ENOTTY; 220 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg); 221 222 case VIDIOC_G_EXT_CTRLS: 223 if (!vfh->ctrl_handler) 224 return -ENOTTY; 225 return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg); 226 227 case VIDIOC_S_EXT_CTRLS: 228 if (!vfh->ctrl_handler) 229 return -ENOTTY; 230 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg); 231 232 case VIDIOC_TRY_EXT_CTRLS: 233 if (!vfh->ctrl_handler) 234 return -ENOTTY; 235 return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg); 236 237 case VIDIOC_DQEVENT: 238 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) 239 return -ENOIOCTLCMD; 240 241 return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK); 242 243 case VIDIOC_SUBSCRIBE_EVENT: 244 return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg); 245 246 case VIDIOC_UNSUBSCRIBE_EVENT: 247 return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg); 248 249 #ifdef CONFIG_VIDEO_ADV_DEBUG 250 case VIDIOC_DBG_G_REGISTER: 251 { 252 struct v4l2_dbg_register *p = arg; 253 254 if (!capable(CAP_SYS_ADMIN)) 255 return -EPERM; 256 return v4l2_subdev_call(sd, core, g_register, p); 257 } 258 case VIDIOC_DBG_S_REGISTER: 259 { 260 struct v4l2_dbg_register *p = arg; 261 262 if (!capable(CAP_SYS_ADMIN)) 263 return -EPERM; 264 return v4l2_subdev_call(sd, core, s_register, p); 265 } 266 case VIDIOC_DBG_G_CHIP_INFO: 267 { 268 struct v4l2_dbg_chip_info *p = arg; 269 270 if (p->match.type != V4L2_CHIP_MATCH_SUBDEV || p->match.addr) 271 return -EINVAL; 272 if (sd->ops->core && sd->ops->core->s_register) 273 p->flags |= V4L2_CHIP_FL_WRITABLE; 274 if (sd->ops->core && sd->ops->core->g_register) 275 p->flags |= V4L2_CHIP_FL_READABLE; 276 strlcpy(p->name, sd->name, sizeof(p->name)); 277 return 0; 278 } 279 #endif 280 281 case VIDIOC_LOG_STATUS: { 282 int ret; 283 284 pr_info("%s: ================= START STATUS =================\n", 285 sd->name); 286 ret = v4l2_subdev_call(sd, core, log_status); 287 pr_info("%s: ================== END STATUS ==================\n", 288 sd->name); 289 return ret; 290 } 291 292 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 293 case VIDIOC_SUBDEV_G_FMT: { 294 struct v4l2_subdev_format *format = arg; 295 296 rval = check_format(sd, format); 297 if (rval) 298 return rval; 299 300 memset(format->reserved, 0, sizeof(format->reserved)); 301 memset(format->format.reserved, 0, sizeof(format->format.reserved)); 302 return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh->pad, format); 303 } 304 305 case VIDIOC_SUBDEV_S_FMT: { 306 struct v4l2_subdev_format *format = arg; 307 308 rval = check_format(sd, format); 309 if (rval) 310 return rval; 311 312 memset(format->reserved, 0, sizeof(format->reserved)); 313 memset(format->format.reserved, 0, sizeof(format->format.reserved)); 314 return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh->pad, format); 315 } 316 317 case VIDIOC_SUBDEV_G_CROP: { 318 struct v4l2_subdev_crop *crop = arg; 319 struct v4l2_subdev_selection sel; 320 321 rval = check_crop(sd, crop); 322 if (rval) 323 return rval; 324 325 memset(crop->reserved, 0, sizeof(crop->reserved)); 326 memset(&sel, 0, sizeof(sel)); 327 sel.which = crop->which; 328 sel.pad = crop->pad; 329 sel.target = V4L2_SEL_TGT_CROP; 330 331 rval = v4l2_subdev_call( 332 sd, pad, get_selection, subdev_fh->pad, &sel); 333 334 crop->rect = sel.r; 335 336 return rval; 337 } 338 339 case VIDIOC_SUBDEV_S_CROP: { 340 struct v4l2_subdev_crop *crop = arg; 341 struct v4l2_subdev_selection sel; 342 343 memset(crop->reserved, 0, sizeof(crop->reserved)); 344 rval = check_crop(sd, crop); 345 if (rval) 346 return rval; 347 348 memset(&sel, 0, sizeof(sel)); 349 sel.which = crop->which; 350 sel.pad = crop->pad; 351 sel.target = V4L2_SEL_TGT_CROP; 352 sel.r = crop->rect; 353 354 rval = v4l2_subdev_call( 355 sd, pad, set_selection, subdev_fh->pad, &sel); 356 357 crop->rect = sel.r; 358 359 return rval; 360 } 361 362 case VIDIOC_SUBDEV_ENUM_MBUS_CODE: { 363 struct v4l2_subdev_mbus_code_enum *code = arg; 364 365 if (code->which != V4L2_SUBDEV_FORMAT_TRY && 366 code->which != V4L2_SUBDEV_FORMAT_ACTIVE) 367 return -EINVAL; 368 369 if (code->pad >= sd->entity.num_pads) 370 return -EINVAL; 371 372 memset(code->reserved, 0, sizeof(code->reserved)); 373 return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh->pad, 374 code); 375 } 376 377 case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: { 378 struct v4l2_subdev_frame_size_enum *fse = arg; 379 380 if (fse->which != V4L2_SUBDEV_FORMAT_TRY && 381 fse->which != V4L2_SUBDEV_FORMAT_ACTIVE) 382 return -EINVAL; 383 384 if (fse->pad >= sd->entity.num_pads) 385 return -EINVAL; 386 387 memset(fse->reserved, 0, sizeof(fse->reserved)); 388 return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh->pad, 389 fse); 390 } 391 392 case VIDIOC_SUBDEV_G_FRAME_INTERVAL: { 393 struct v4l2_subdev_frame_interval *fi = arg; 394 395 if (fi->pad >= sd->entity.num_pads) 396 return -EINVAL; 397 398 memset(fi->reserved, 0, sizeof(fi->reserved)); 399 return v4l2_subdev_call(sd, video, g_frame_interval, arg); 400 } 401 402 case VIDIOC_SUBDEV_S_FRAME_INTERVAL: { 403 struct v4l2_subdev_frame_interval *fi = arg; 404 405 if (fi->pad >= sd->entity.num_pads) 406 return -EINVAL; 407 408 memset(fi->reserved, 0, sizeof(fi->reserved)); 409 return v4l2_subdev_call(sd, video, s_frame_interval, arg); 410 } 411 412 case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: { 413 struct v4l2_subdev_frame_interval_enum *fie = arg; 414 415 if (fie->which != V4L2_SUBDEV_FORMAT_TRY && 416 fie->which != V4L2_SUBDEV_FORMAT_ACTIVE) 417 return -EINVAL; 418 419 if (fie->pad >= sd->entity.num_pads) 420 return -EINVAL; 421 422 memset(fie->reserved, 0, sizeof(fie->reserved)); 423 return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad, 424 fie); 425 } 426 427 case VIDIOC_SUBDEV_G_SELECTION: { 428 struct v4l2_subdev_selection *sel = arg; 429 430 rval = check_selection(sd, sel); 431 if (rval) 432 return rval; 433 434 memset(sel->reserved, 0, sizeof(sel->reserved)); 435 return v4l2_subdev_call( 436 sd, pad, get_selection, subdev_fh->pad, sel); 437 } 438 439 case VIDIOC_SUBDEV_S_SELECTION: { 440 struct v4l2_subdev_selection *sel = arg; 441 442 rval = check_selection(sd, sel); 443 if (rval) 444 return rval; 445 446 memset(sel->reserved, 0, sizeof(sel->reserved)); 447 return v4l2_subdev_call( 448 sd, pad, set_selection, subdev_fh->pad, sel); 449 } 450 451 case VIDIOC_G_EDID: { 452 struct v4l2_subdev_edid *edid = arg; 453 454 rval = check_edid(sd, edid); 455 if (rval) 456 return rval; 457 458 return v4l2_subdev_call(sd, pad, get_edid, edid); 459 } 460 461 case VIDIOC_S_EDID: { 462 struct v4l2_subdev_edid *edid = arg; 463 464 rval = check_edid(sd, edid); 465 if (rval) 466 return rval; 467 468 return v4l2_subdev_call(sd, pad, set_edid, edid); 469 } 470 471 case VIDIOC_SUBDEV_DV_TIMINGS_CAP: { 472 struct v4l2_dv_timings_cap *cap = arg; 473 474 if (cap->pad >= sd->entity.num_pads) 475 return -EINVAL; 476 477 return v4l2_subdev_call(sd, pad, dv_timings_cap, cap); 478 } 479 480 case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: { 481 struct v4l2_enum_dv_timings *dvt = arg; 482 483 if (dvt->pad >= sd->entity.num_pads) 484 return -EINVAL; 485 486 return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt); 487 } 488 489 case VIDIOC_SUBDEV_QUERY_DV_TIMINGS: 490 return v4l2_subdev_call(sd, video, query_dv_timings, arg); 491 492 case VIDIOC_SUBDEV_G_DV_TIMINGS: 493 return v4l2_subdev_call(sd, video, g_dv_timings, arg); 494 495 case VIDIOC_SUBDEV_S_DV_TIMINGS: 496 return v4l2_subdev_call(sd, video, s_dv_timings, arg); 497 #endif 498 default: 499 return v4l2_subdev_call(sd, core, ioctl, cmd, arg); 500 } 501 502 return 0; 503 } 504 505 static long subdev_ioctl(struct file *file, unsigned int cmd, 506 unsigned long arg) 507 { 508 return video_usercopy(file, cmd, arg, subdev_do_ioctl); 509 } 510 511 #ifdef CONFIG_COMPAT 512 static long subdev_compat_ioctl32(struct file *file, unsigned int cmd, 513 unsigned long arg) 514 { 515 struct video_device *vdev = video_devdata(file); 516 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); 517 518 return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg); 519 } 520 #endif 521 522 static __poll_t subdev_poll(struct file *file, poll_table *wait) 523 { 524 struct video_device *vdev = video_devdata(file); 525 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); 526 struct v4l2_fh *fh = file->private_data; 527 528 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) 529 return EPOLLERR; 530 531 poll_wait(file, &fh->wait, wait); 532 533 if (v4l2_event_pending(fh)) 534 return EPOLLPRI; 535 536 return 0; 537 } 538 539 const struct v4l2_file_operations v4l2_subdev_fops = { 540 .owner = THIS_MODULE, 541 .open = subdev_open, 542 .unlocked_ioctl = subdev_ioctl, 543 #ifdef CONFIG_COMPAT 544 .compat_ioctl32 = subdev_compat_ioctl32, 545 #endif 546 .release = subdev_close, 547 .poll = subdev_poll, 548 }; 549 550 #ifdef CONFIG_MEDIA_CONTROLLER 551 int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd, 552 struct media_link *link, 553 struct v4l2_subdev_format *source_fmt, 554 struct v4l2_subdev_format *sink_fmt) 555 { 556 /* The width, height and code must match. */ 557 if (source_fmt->format.width != sink_fmt->format.width 558 || source_fmt->format.height != sink_fmt->format.height 559 || source_fmt->format.code != sink_fmt->format.code) 560 return -EPIPE; 561 562 /* The field order must match, or the sink field order must be NONE 563 * to support interlaced hardware connected to bridges that support 564 * progressive formats only. 565 */ 566 if (source_fmt->format.field != sink_fmt->format.field && 567 sink_fmt->format.field != V4L2_FIELD_NONE) 568 return -EPIPE; 569 570 return 0; 571 } 572 EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default); 573 574 static int 575 v4l2_subdev_link_validate_get_format(struct media_pad *pad, 576 struct v4l2_subdev_format *fmt) 577 { 578 if (is_media_entity_v4l2_subdev(pad->entity)) { 579 struct v4l2_subdev *sd = 580 media_entity_to_v4l2_subdev(pad->entity); 581 582 fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE; 583 fmt->pad = pad->index; 584 return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt); 585 } 586 587 WARN(pad->entity->function != MEDIA_ENT_F_IO_V4L, 588 "Driver bug! Wrong media entity type 0x%08x, entity %s\n", 589 pad->entity->function, pad->entity->name); 590 591 return -EINVAL; 592 } 593 594 int v4l2_subdev_link_validate(struct media_link *link) 595 { 596 struct v4l2_subdev *sink; 597 struct v4l2_subdev_format sink_fmt, source_fmt; 598 int rval; 599 600 rval = v4l2_subdev_link_validate_get_format( 601 link->source, &source_fmt); 602 if (rval < 0) 603 return 0; 604 605 rval = v4l2_subdev_link_validate_get_format( 606 link->sink, &sink_fmt); 607 if (rval < 0) 608 return 0; 609 610 sink = media_entity_to_v4l2_subdev(link->sink->entity); 611 612 rval = v4l2_subdev_call(sink, pad, link_validate, link, 613 &source_fmt, &sink_fmt); 614 if (rval != -ENOIOCTLCMD) 615 return rval; 616 617 return v4l2_subdev_link_validate_default( 618 sink, link, &source_fmt, &sink_fmt); 619 } 620 EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate); 621 622 struct v4l2_subdev_pad_config * 623 v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd) 624 { 625 struct v4l2_subdev_pad_config *cfg; 626 int ret; 627 628 if (!sd->entity.num_pads) 629 return NULL; 630 631 cfg = kvmalloc_array(sd->entity.num_pads, sizeof(*cfg), 632 GFP_KERNEL | __GFP_ZERO); 633 if (!cfg) 634 return NULL; 635 636 ret = v4l2_subdev_call(sd, pad, init_cfg, cfg); 637 if (ret < 0 && ret != -ENOIOCTLCMD) { 638 kvfree(cfg); 639 return NULL; 640 } 641 642 return cfg; 643 } 644 EXPORT_SYMBOL_GPL(v4l2_subdev_alloc_pad_config); 645 646 void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg) 647 { 648 kvfree(cfg); 649 } 650 EXPORT_SYMBOL_GPL(v4l2_subdev_free_pad_config); 651 #endif /* CONFIG_MEDIA_CONTROLLER */ 652 653 void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) 654 { 655 INIT_LIST_HEAD(&sd->list); 656 BUG_ON(!ops); 657 sd->ops = ops; 658 sd->v4l2_dev = NULL; 659 sd->flags = 0; 660 sd->name[0] = '\0'; 661 sd->grp_id = 0; 662 sd->dev_priv = NULL; 663 sd->host_priv = NULL; 664 #if defined(CONFIG_MEDIA_CONTROLLER) 665 sd->entity.name = sd->name; 666 sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV; 667 sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN; 668 #endif 669 } 670 EXPORT_SYMBOL(v4l2_subdev_init); 671 672 void v4l2_subdev_notify_event(struct v4l2_subdev *sd, 673 const struct v4l2_event *ev) 674 { 675 v4l2_event_queue(sd->devnode, ev); 676 v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT, (void *)ev); 677 } 678 EXPORT_SYMBOL_GPL(v4l2_subdev_notify_event); 679