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/module.h> 22 #include <linux/slab.h> 23 #include <linux/types.h> 24 #include <linux/videodev2.h> 25 #include <linux/export.h> 26 27 #include <media/v4l2-ctrls.h> 28 #include <media/v4l2-device.h> 29 #include <media/v4l2-ioctl.h> 30 #include <media/v4l2-fh.h> 31 #include <media/v4l2-event.h> 32 33 static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd) 34 { 35 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 36 if (sd->entity.num_pads) { 37 fh->pad = v4l2_subdev_alloc_pad_config(sd); 38 if (fh->pad == NULL) 39 return -ENOMEM; 40 } 41 #endif 42 return 0; 43 } 44 45 static void subdev_fh_free(struct v4l2_subdev_fh *fh) 46 { 47 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 48 v4l2_subdev_free_pad_config(fh->pad); 49 fh->pad = NULL; 50 #endif 51 } 52 53 static int subdev_open(struct file *file) 54 { 55 struct video_device *vdev = video_devdata(file); 56 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); 57 struct v4l2_subdev_fh *subdev_fh; 58 int ret; 59 60 subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL); 61 if (subdev_fh == NULL) 62 return -ENOMEM; 63 64 ret = subdev_fh_init(subdev_fh, sd); 65 if (ret) { 66 kfree(subdev_fh); 67 return ret; 68 } 69 70 v4l2_fh_init(&subdev_fh->vfh, vdev); 71 v4l2_fh_add(&subdev_fh->vfh); 72 file->private_data = &subdev_fh->vfh; 73 #if defined(CONFIG_MEDIA_CONTROLLER) 74 if (sd->v4l2_dev->mdev && sd->entity.graph_obj.mdev->dev) { 75 struct module *owner; 76 77 owner = sd->entity.graph_obj.mdev->dev->driver->owner; 78 if (!try_module_get(owner)) { 79 ret = -EBUSY; 80 goto err; 81 } 82 subdev_fh->owner = owner; 83 } 84 #endif 85 86 if (sd->internal_ops && sd->internal_ops->open) { 87 ret = sd->internal_ops->open(sd, subdev_fh); 88 if (ret < 0) 89 goto err; 90 } 91 92 return 0; 93 94 err: 95 module_put(subdev_fh->owner); 96 v4l2_fh_del(&subdev_fh->vfh); 97 v4l2_fh_exit(&subdev_fh->vfh); 98 subdev_fh_free(subdev_fh); 99 kfree(subdev_fh); 100 101 return ret; 102 } 103 104 static int subdev_close(struct file *file) 105 { 106 struct video_device *vdev = video_devdata(file); 107 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); 108 struct v4l2_fh *vfh = file->private_data; 109 struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); 110 111 if (sd->internal_ops && sd->internal_ops->close) 112 sd->internal_ops->close(sd, subdev_fh); 113 module_put(subdev_fh->owner); 114 v4l2_fh_del(vfh); 115 v4l2_fh_exit(vfh); 116 subdev_fh_free(subdev_fh); 117 kfree(subdev_fh); 118 file->private_data = NULL; 119 120 return 0; 121 } 122 123 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 124 static int check_format(struct v4l2_subdev *sd, 125 struct v4l2_subdev_format *format) 126 { 127 if (format->which != V4L2_SUBDEV_FORMAT_TRY && 128 format->which != V4L2_SUBDEV_FORMAT_ACTIVE) 129 return -EINVAL; 130 131 if (format->pad >= sd->entity.num_pads) 132 return -EINVAL; 133 134 return 0; 135 } 136 137 static int check_crop(struct v4l2_subdev *sd, struct v4l2_subdev_crop *crop) 138 { 139 if (crop->which != V4L2_SUBDEV_FORMAT_TRY && 140 crop->which != V4L2_SUBDEV_FORMAT_ACTIVE) 141 return -EINVAL; 142 143 if (crop->pad >= sd->entity.num_pads) 144 return -EINVAL; 145 146 return 0; 147 } 148 149 static int check_selection(struct v4l2_subdev *sd, 150 struct v4l2_subdev_selection *sel) 151 { 152 if (sel->which != V4L2_SUBDEV_FORMAT_TRY && 153 sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) 154 return -EINVAL; 155 156 if (sel->pad >= sd->entity.num_pads) 157 return -EINVAL; 158 159 return 0; 160 } 161 162 static int check_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid) 163 { 164 if (edid->pad >= sd->entity.num_pads) 165 return -EINVAL; 166 167 if (edid->blocks && edid->edid == NULL) 168 return -EINVAL; 169 170 return 0; 171 } 172 #endif 173 174 static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) 175 { 176 struct video_device *vdev = video_devdata(file); 177 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); 178 struct v4l2_fh *vfh = file->private_data; 179 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 180 struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); 181 int rval; 182 #endif 183 184 switch (cmd) { 185 case VIDIOC_QUERYCTRL: 186 /* 187 * TODO: this really should be folded into v4l2_queryctrl (this 188 * currently returns -EINVAL for NULL control handlers). 189 * However, v4l2_queryctrl() is still called directly by 190 * drivers as well and until that has been addressed I believe 191 * it is safer to do the check here. The same is true for the 192 * other control ioctls below. 193 */ 194 if (!vfh->ctrl_handler) 195 return -ENOTTY; 196 return v4l2_queryctrl(vfh->ctrl_handler, arg); 197 198 case VIDIOC_QUERY_EXT_CTRL: 199 if (!vfh->ctrl_handler) 200 return -ENOTTY; 201 return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg); 202 203 case VIDIOC_QUERYMENU: 204 if (!vfh->ctrl_handler) 205 return -ENOTTY; 206 return v4l2_querymenu(vfh->ctrl_handler, arg); 207 208 case VIDIOC_G_CTRL: 209 if (!vfh->ctrl_handler) 210 return -ENOTTY; 211 return v4l2_g_ctrl(vfh->ctrl_handler, arg); 212 213 case VIDIOC_S_CTRL: 214 if (!vfh->ctrl_handler) 215 return -ENOTTY; 216 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg); 217 218 case VIDIOC_G_EXT_CTRLS: 219 if (!vfh->ctrl_handler) 220 return -ENOTTY; 221 return v4l2_g_ext_ctrls(vfh->ctrl_handler, 222 sd->v4l2_dev->mdev, arg); 223 224 case VIDIOC_S_EXT_CTRLS: 225 if (!vfh->ctrl_handler) 226 return -ENOTTY; 227 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, 228 sd->v4l2_dev->mdev, arg); 229 230 case VIDIOC_TRY_EXT_CTRLS: 231 if (!vfh->ctrl_handler) 232 return -ENOTTY; 233 return v4l2_try_ext_ctrls(vfh->ctrl_handler, 234 sd->v4l2_dev->mdev, arg); 235 236 case VIDIOC_DQEVENT: 237 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) 238 return -ENOIOCTLCMD; 239 240 return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK); 241 242 case VIDIOC_SUBSCRIBE_EVENT: 243 return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg); 244 245 case VIDIOC_UNSUBSCRIBE_EVENT: 246 return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg); 247 248 #ifdef CONFIG_VIDEO_ADV_DEBUG 249 case VIDIOC_DBG_G_REGISTER: 250 { 251 struct v4l2_dbg_register *p = arg; 252 253 if (!capable(CAP_SYS_ADMIN)) 254 return -EPERM; 255 return v4l2_subdev_call(sd, core, g_register, p); 256 } 257 case VIDIOC_DBG_S_REGISTER: 258 { 259 struct v4l2_dbg_register *p = arg; 260 261 if (!capable(CAP_SYS_ADMIN)) 262 return -EPERM; 263 return v4l2_subdev_call(sd, core, s_register, p); 264 } 265 case VIDIOC_DBG_G_CHIP_INFO: 266 { 267 struct v4l2_dbg_chip_info *p = arg; 268 269 if (p->match.type != V4L2_CHIP_MATCH_SUBDEV || p->match.addr) 270 return -EINVAL; 271 if (sd->ops->core && sd->ops->core->s_register) 272 p->flags |= V4L2_CHIP_FL_WRITABLE; 273 if (sd->ops->core && sd->ops->core->g_register) 274 p->flags |= V4L2_CHIP_FL_READABLE; 275 strscpy(p->name, sd->name, sizeof(p->name)); 276 return 0; 277 } 278 #endif 279 280 case VIDIOC_LOG_STATUS: { 281 int ret; 282 283 pr_info("%s: ================= START STATUS =================\n", 284 sd->name); 285 ret = v4l2_subdev_call(sd, core, log_status); 286 pr_info("%s: ================== END STATUS ==================\n", 287 sd->name); 288 return ret; 289 } 290 291 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 292 case VIDIOC_SUBDEV_G_FMT: { 293 struct v4l2_subdev_format *format = arg; 294 295 rval = check_format(sd, format); 296 if (rval) 297 return rval; 298 299 memset(format->reserved, 0, sizeof(format->reserved)); 300 memset(format->format.reserved, 0, sizeof(format->format.reserved)); 301 return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh->pad, format); 302 } 303 304 case VIDIOC_SUBDEV_S_FMT: { 305 struct v4l2_subdev_format *format = arg; 306 307 rval = check_format(sd, format); 308 if (rval) 309 return rval; 310 311 memset(format->reserved, 0, sizeof(format->reserved)); 312 memset(format->format.reserved, 0, sizeof(format->format.reserved)); 313 return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh->pad, format); 314 } 315 316 case VIDIOC_SUBDEV_G_CROP: { 317 struct v4l2_subdev_crop *crop = arg; 318 struct v4l2_subdev_selection sel; 319 320 rval = check_crop(sd, crop); 321 if (rval) 322 return rval; 323 324 memset(crop->reserved, 0, sizeof(crop->reserved)); 325 memset(&sel, 0, sizeof(sel)); 326 sel.which = crop->which; 327 sel.pad = crop->pad; 328 sel.target = V4L2_SEL_TGT_CROP; 329 330 rval = v4l2_subdev_call( 331 sd, pad, get_selection, subdev_fh->pad, &sel); 332 333 crop->rect = sel.r; 334 335 return rval; 336 } 337 338 case VIDIOC_SUBDEV_S_CROP: { 339 struct v4l2_subdev_crop *crop = arg; 340 struct v4l2_subdev_selection sel; 341 342 memset(crop->reserved, 0, sizeof(crop->reserved)); 343 rval = check_crop(sd, crop); 344 if (rval) 345 return rval; 346 347 memset(&sel, 0, sizeof(sel)); 348 sel.which = crop->which; 349 sel.pad = crop->pad; 350 sel.target = V4L2_SEL_TGT_CROP; 351 sel.r = crop->rect; 352 353 rval = v4l2_subdev_call( 354 sd, pad, set_selection, subdev_fh->pad, &sel); 355 356 crop->rect = sel.r; 357 358 return rval; 359 } 360 361 case VIDIOC_SUBDEV_ENUM_MBUS_CODE: { 362 struct v4l2_subdev_mbus_code_enum *code = arg; 363 364 if (code->which != V4L2_SUBDEV_FORMAT_TRY && 365 code->which != V4L2_SUBDEV_FORMAT_ACTIVE) 366 return -EINVAL; 367 368 if (code->pad >= sd->entity.num_pads) 369 return -EINVAL; 370 371 memset(code->reserved, 0, sizeof(code->reserved)); 372 return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh->pad, 373 code); 374 } 375 376 case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: { 377 struct v4l2_subdev_frame_size_enum *fse = arg; 378 379 if (fse->which != V4L2_SUBDEV_FORMAT_TRY && 380 fse->which != V4L2_SUBDEV_FORMAT_ACTIVE) 381 return -EINVAL; 382 383 if (fse->pad >= sd->entity.num_pads) 384 return -EINVAL; 385 386 memset(fse->reserved, 0, sizeof(fse->reserved)); 387 return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh->pad, 388 fse); 389 } 390 391 case VIDIOC_SUBDEV_G_FRAME_INTERVAL: { 392 struct v4l2_subdev_frame_interval *fi = arg; 393 394 if (fi->pad >= sd->entity.num_pads) 395 return -EINVAL; 396 397 memset(fi->reserved, 0, sizeof(fi->reserved)); 398 return v4l2_subdev_call(sd, video, g_frame_interval, arg); 399 } 400 401 case VIDIOC_SUBDEV_S_FRAME_INTERVAL: { 402 struct v4l2_subdev_frame_interval *fi = arg; 403 404 if (fi->pad >= sd->entity.num_pads) 405 return -EINVAL; 406 407 memset(fi->reserved, 0, sizeof(fi->reserved)); 408 return v4l2_subdev_call(sd, video, s_frame_interval, arg); 409 } 410 411 case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: { 412 struct v4l2_subdev_frame_interval_enum *fie = arg; 413 414 if (fie->which != V4L2_SUBDEV_FORMAT_TRY && 415 fie->which != V4L2_SUBDEV_FORMAT_ACTIVE) 416 return -EINVAL; 417 418 if (fie->pad >= sd->entity.num_pads) 419 return -EINVAL; 420 421 memset(fie->reserved, 0, sizeof(fie->reserved)); 422 return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad, 423 fie); 424 } 425 426 case VIDIOC_SUBDEV_G_SELECTION: { 427 struct v4l2_subdev_selection *sel = arg; 428 429 rval = check_selection(sd, sel); 430 if (rval) 431 return rval; 432 433 memset(sel->reserved, 0, sizeof(sel->reserved)); 434 return v4l2_subdev_call( 435 sd, pad, get_selection, subdev_fh->pad, sel); 436 } 437 438 case VIDIOC_SUBDEV_S_SELECTION: { 439 struct v4l2_subdev_selection *sel = arg; 440 441 rval = check_selection(sd, sel); 442 if (rval) 443 return rval; 444 445 memset(sel->reserved, 0, sizeof(sel->reserved)); 446 return v4l2_subdev_call( 447 sd, pad, set_selection, subdev_fh->pad, sel); 448 } 449 450 case VIDIOC_G_EDID: { 451 struct v4l2_subdev_edid *edid = arg; 452 453 rval = check_edid(sd, edid); 454 if (rval) 455 return rval; 456 457 return v4l2_subdev_call(sd, pad, get_edid, edid); 458 } 459 460 case VIDIOC_S_EDID: { 461 struct v4l2_subdev_edid *edid = arg; 462 463 rval = check_edid(sd, edid); 464 if (rval) 465 return rval; 466 467 return v4l2_subdev_call(sd, pad, set_edid, edid); 468 } 469 470 case VIDIOC_SUBDEV_DV_TIMINGS_CAP: { 471 struct v4l2_dv_timings_cap *cap = arg; 472 473 if (cap->pad >= sd->entity.num_pads) 474 return -EINVAL; 475 476 return v4l2_subdev_call(sd, pad, dv_timings_cap, cap); 477 } 478 479 case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: { 480 struct v4l2_enum_dv_timings *dvt = arg; 481 482 if (dvt->pad >= sd->entity.num_pads) 483 return -EINVAL; 484 485 return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt); 486 } 487 488 case VIDIOC_SUBDEV_QUERY_DV_TIMINGS: 489 return v4l2_subdev_call(sd, video, query_dv_timings, arg); 490 491 case VIDIOC_SUBDEV_G_DV_TIMINGS: 492 return v4l2_subdev_call(sd, video, g_dv_timings, arg); 493 494 case VIDIOC_SUBDEV_S_DV_TIMINGS: 495 return v4l2_subdev_call(sd, video, s_dv_timings, arg); 496 497 case VIDIOC_SUBDEV_G_STD: 498 return v4l2_subdev_call(sd, video, g_std, arg); 499 500 case VIDIOC_SUBDEV_S_STD: { 501 v4l2_std_id *std = arg; 502 503 return v4l2_subdev_call(sd, video, s_std, *std); 504 } 505 506 case VIDIOC_SUBDEV_ENUMSTD: { 507 struct v4l2_standard *p = arg; 508 v4l2_std_id id; 509 510 if (v4l2_subdev_call(sd, video, g_tvnorms, &id)) 511 return -EINVAL; 512 513 return v4l_video_std_enumstd(p, id); 514 } 515 516 case VIDIOC_SUBDEV_QUERYSTD: 517 return v4l2_subdev_call(sd, video, querystd, arg); 518 #endif 519 default: 520 return v4l2_subdev_call(sd, core, ioctl, cmd, arg); 521 } 522 523 return 0; 524 } 525 526 static long subdev_do_ioctl_lock(struct file *file, unsigned int cmd, void *arg) 527 { 528 struct video_device *vdev = video_devdata(file); 529 struct mutex *lock = vdev->lock; 530 long ret = -ENODEV; 531 532 if (lock && mutex_lock_interruptible(lock)) 533 return -ERESTARTSYS; 534 if (video_is_registered(vdev)) 535 ret = subdev_do_ioctl(file, cmd, arg); 536 if (lock) 537 mutex_unlock(lock); 538 return ret; 539 } 540 541 static long subdev_ioctl(struct file *file, unsigned int cmd, 542 unsigned long arg) 543 { 544 return video_usercopy(file, cmd, arg, subdev_do_ioctl_lock); 545 } 546 547 #ifdef CONFIG_COMPAT 548 static long subdev_compat_ioctl32(struct file *file, unsigned int cmd, 549 unsigned long arg) 550 { 551 struct video_device *vdev = video_devdata(file); 552 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); 553 554 return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg); 555 } 556 #endif 557 558 static __poll_t subdev_poll(struct file *file, poll_table *wait) 559 { 560 struct video_device *vdev = video_devdata(file); 561 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); 562 struct v4l2_fh *fh = file->private_data; 563 564 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) 565 return EPOLLERR; 566 567 poll_wait(file, &fh->wait, wait); 568 569 if (v4l2_event_pending(fh)) 570 return EPOLLPRI; 571 572 return 0; 573 } 574 575 const struct v4l2_file_operations v4l2_subdev_fops = { 576 .owner = THIS_MODULE, 577 .open = subdev_open, 578 .unlocked_ioctl = subdev_ioctl, 579 #ifdef CONFIG_COMPAT 580 .compat_ioctl32 = subdev_compat_ioctl32, 581 #endif 582 .release = subdev_close, 583 .poll = subdev_poll, 584 }; 585 586 #ifdef CONFIG_MEDIA_CONTROLLER 587 int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd, 588 struct media_link *link, 589 struct v4l2_subdev_format *source_fmt, 590 struct v4l2_subdev_format *sink_fmt) 591 { 592 /* The width, height and code must match. */ 593 if (source_fmt->format.width != sink_fmt->format.width 594 || source_fmt->format.height != sink_fmt->format.height 595 || source_fmt->format.code != sink_fmt->format.code) 596 return -EPIPE; 597 598 /* The field order must match, or the sink field order must be NONE 599 * to support interlaced hardware connected to bridges that support 600 * progressive formats only. 601 */ 602 if (source_fmt->format.field != sink_fmt->format.field && 603 sink_fmt->format.field != V4L2_FIELD_NONE) 604 return -EPIPE; 605 606 return 0; 607 } 608 EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default); 609 610 static int 611 v4l2_subdev_link_validate_get_format(struct media_pad *pad, 612 struct v4l2_subdev_format *fmt) 613 { 614 if (is_media_entity_v4l2_subdev(pad->entity)) { 615 struct v4l2_subdev *sd = 616 media_entity_to_v4l2_subdev(pad->entity); 617 618 fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE; 619 fmt->pad = pad->index; 620 return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt); 621 } 622 623 WARN(pad->entity->function != MEDIA_ENT_F_IO_V4L, 624 "Driver bug! Wrong media entity type 0x%08x, entity %s\n", 625 pad->entity->function, pad->entity->name); 626 627 return -EINVAL; 628 } 629 630 int v4l2_subdev_link_validate(struct media_link *link) 631 { 632 struct v4l2_subdev *sink; 633 struct v4l2_subdev_format sink_fmt, source_fmt; 634 int rval; 635 636 rval = v4l2_subdev_link_validate_get_format( 637 link->source, &source_fmt); 638 if (rval < 0) 639 return 0; 640 641 rval = v4l2_subdev_link_validate_get_format( 642 link->sink, &sink_fmt); 643 if (rval < 0) 644 return 0; 645 646 sink = media_entity_to_v4l2_subdev(link->sink->entity); 647 648 rval = v4l2_subdev_call(sink, pad, link_validate, link, 649 &source_fmt, &sink_fmt); 650 if (rval != -ENOIOCTLCMD) 651 return rval; 652 653 return v4l2_subdev_link_validate_default( 654 sink, link, &source_fmt, &sink_fmt); 655 } 656 EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate); 657 658 struct v4l2_subdev_pad_config * 659 v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd) 660 { 661 struct v4l2_subdev_pad_config *cfg; 662 int ret; 663 664 if (!sd->entity.num_pads) 665 return NULL; 666 667 cfg = kvmalloc_array(sd->entity.num_pads, sizeof(*cfg), 668 GFP_KERNEL | __GFP_ZERO); 669 if (!cfg) 670 return NULL; 671 672 ret = v4l2_subdev_call(sd, pad, init_cfg, cfg); 673 if (ret < 0 && ret != -ENOIOCTLCMD) { 674 kvfree(cfg); 675 return NULL; 676 } 677 678 return cfg; 679 } 680 EXPORT_SYMBOL_GPL(v4l2_subdev_alloc_pad_config); 681 682 void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg) 683 { 684 kvfree(cfg); 685 } 686 EXPORT_SYMBOL_GPL(v4l2_subdev_free_pad_config); 687 #endif /* CONFIG_MEDIA_CONTROLLER */ 688 689 void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) 690 { 691 INIT_LIST_HEAD(&sd->list); 692 BUG_ON(!ops); 693 sd->ops = ops; 694 sd->v4l2_dev = NULL; 695 sd->flags = 0; 696 sd->name[0] = '\0'; 697 sd->grp_id = 0; 698 sd->dev_priv = NULL; 699 sd->host_priv = NULL; 700 #if defined(CONFIG_MEDIA_CONTROLLER) 701 sd->entity.name = sd->name; 702 sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV; 703 sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN; 704 #endif 705 } 706 EXPORT_SYMBOL(v4l2_subdev_init); 707 708 void v4l2_subdev_notify_event(struct v4l2_subdev *sd, 709 const struct v4l2_event *ev) 710 { 711 v4l2_event_queue(sd->devnode, ev); 712 v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT, (void *)ev); 713 } 714 EXPORT_SYMBOL_GPL(v4l2_subdev_notify_event); 715