Loading...
Note: File does not exist in v3.1.
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * V4L2 sub-device
4 *
5 * Copyright (C) 2010 Nokia Corporation
6 *
7 * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
8 * Sakari Ailus <sakari.ailus@iki.fi>
9 */
10
11#include <linux/ioctl.h>
12#include <linux/mm.h>
13#include <linux/module.h>
14#include <linux/slab.h>
15#include <linux/types.h>
16#include <linux/videodev2.h>
17#include <linux/export.h>
18#include <linux/version.h>
19
20#include <media/v4l2-ctrls.h>
21#include <media/v4l2-device.h>
22#include <media/v4l2-ioctl.h>
23#include <media/v4l2-fh.h>
24#include <media/v4l2-event.h>
25
26#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
27static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd)
28{
29 if (sd->entity.num_pads) {
30 fh->pad = v4l2_subdev_alloc_pad_config(sd);
31 if (fh->pad == NULL)
32 return -ENOMEM;
33 }
34
35 return 0;
36}
37
38static void subdev_fh_free(struct v4l2_subdev_fh *fh)
39{
40 v4l2_subdev_free_pad_config(fh->pad);
41 fh->pad = NULL;
42}
43
44static int subdev_open(struct file *file)
45{
46 struct video_device *vdev = video_devdata(file);
47 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
48 struct v4l2_subdev_fh *subdev_fh;
49 int ret;
50
51 subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
52 if (subdev_fh == NULL)
53 return -ENOMEM;
54
55 ret = subdev_fh_init(subdev_fh, sd);
56 if (ret) {
57 kfree(subdev_fh);
58 return ret;
59 }
60
61 v4l2_fh_init(&subdev_fh->vfh, vdev);
62 v4l2_fh_add(&subdev_fh->vfh);
63 file->private_data = &subdev_fh->vfh;
64#if defined(CONFIG_MEDIA_CONTROLLER)
65 if (sd->v4l2_dev->mdev && sd->entity.graph_obj.mdev->dev) {
66 struct module *owner;
67
68 owner = sd->entity.graph_obj.mdev->dev->driver->owner;
69 if (!try_module_get(owner)) {
70 ret = -EBUSY;
71 goto err;
72 }
73 subdev_fh->owner = owner;
74 }
75#endif
76
77 if (sd->internal_ops && sd->internal_ops->open) {
78 ret = sd->internal_ops->open(sd, subdev_fh);
79 if (ret < 0)
80 goto err;
81 }
82
83 return 0;
84
85err:
86 module_put(subdev_fh->owner);
87 v4l2_fh_del(&subdev_fh->vfh);
88 v4l2_fh_exit(&subdev_fh->vfh);
89 subdev_fh_free(subdev_fh);
90 kfree(subdev_fh);
91
92 return ret;
93}
94
95static int subdev_close(struct file *file)
96{
97 struct video_device *vdev = video_devdata(file);
98 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
99 struct v4l2_fh *vfh = file->private_data;
100 struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
101
102 if (sd->internal_ops && sd->internal_ops->close)
103 sd->internal_ops->close(sd, subdev_fh);
104 module_put(subdev_fh->owner);
105 v4l2_fh_del(vfh);
106 v4l2_fh_exit(vfh);
107 subdev_fh_free(subdev_fh);
108 kfree(subdev_fh);
109 file->private_data = NULL;
110
111 return 0;
112}
113#else /* CONFIG_VIDEO_V4L2_SUBDEV_API */
114static int subdev_open(struct file *file)
115{
116 return -ENODEV;
117}
118
119static int subdev_close(struct file *file)
120{
121 return -ENODEV;
122}
123#endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */
124
125static inline int check_which(u32 which)
126{
127 if (which != V4L2_SUBDEV_FORMAT_TRY &&
128 which != V4L2_SUBDEV_FORMAT_ACTIVE)
129 return -EINVAL;
130
131 return 0;
132}
133
134static inline int check_pad(struct v4l2_subdev *sd, u32 pad)
135{
136#if defined(CONFIG_MEDIA_CONTROLLER)
137 if (sd->entity.num_pads) {
138 if (pad >= sd->entity.num_pads)
139 return -EINVAL;
140 return 0;
141 }
142#endif
143 /* allow pad 0 on subdevices not registered as media entities */
144 if (pad > 0)
145 return -EINVAL;
146 return 0;
147}
148
149static int check_cfg(u32 which, struct v4l2_subdev_pad_config *cfg)
150{
151 if (which == V4L2_SUBDEV_FORMAT_TRY && !cfg)
152 return -EINVAL;
153
154 return 0;
155}
156
157static inline int check_format(struct v4l2_subdev *sd,
158 struct v4l2_subdev_pad_config *cfg,
159 struct v4l2_subdev_format *format)
160{
161 if (!format)
162 return -EINVAL;
163
164 return check_which(format->which) ? : check_pad(sd, format->pad) ? :
165 check_cfg(format->which, cfg);
166}
167
168static int call_get_fmt(struct v4l2_subdev *sd,
169 struct v4l2_subdev_pad_config *cfg,
170 struct v4l2_subdev_format *format)
171{
172 return check_format(sd, cfg, format) ? :
173 sd->ops->pad->get_fmt(sd, cfg, format);
174}
175
176static int call_set_fmt(struct v4l2_subdev *sd,
177 struct v4l2_subdev_pad_config *cfg,
178 struct v4l2_subdev_format *format)
179{
180 return check_format(sd, cfg, format) ? :
181 sd->ops->pad->set_fmt(sd, cfg, format);
182}
183
184static int call_enum_mbus_code(struct v4l2_subdev *sd,
185 struct v4l2_subdev_pad_config *cfg,
186 struct v4l2_subdev_mbus_code_enum *code)
187{
188 if (!code)
189 return -EINVAL;
190
191 return check_which(code->which) ? : check_pad(sd, code->pad) ? :
192 check_cfg(code->which, cfg) ? :
193 sd->ops->pad->enum_mbus_code(sd, cfg, code);
194}
195
196static int call_enum_frame_size(struct v4l2_subdev *sd,
197 struct v4l2_subdev_pad_config *cfg,
198 struct v4l2_subdev_frame_size_enum *fse)
199{
200 if (!fse)
201 return -EINVAL;
202
203 return check_which(fse->which) ? : check_pad(sd, fse->pad) ? :
204 check_cfg(fse->which, cfg) ? :
205 sd->ops->pad->enum_frame_size(sd, cfg, fse);
206}
207
208static inline int check_frame_interval(struct v4l2_subdev *sd,
209 struct v4l2_subdev_frame_interval *fi)
210{
211 if (!fi)
212 return -EINVAL;
213
214 return check_pad(sd, fi->pad);
215}
216
217static int call_g_frame_interval(struct v4l2_subdev *sd,
218 struct v4l2_subdev_frame_interval *fi)
219{
220 return check_frame_interval(sd, fi) ? :
221 sd->ops->video->g_frame_interval(sd, fi);
222}
223
224static int call_s_frame_interval(struct v4l2_subdev *sd,
225 struct v4l2_subdev_frame_interval *fi)
226{
227 return check_frame_interval(sd, fi) ? :
228 sd->ops->video->s_frame_interval(sd, fi);
229}
230
231static int call_enum_frame_interval(struct v4l2_subdev *sd,
232 struct v4l2_subdev_pad_config *cfg,
233 struct v4l2_subdev_frame_interval_enum *fie)
234{
235 if (!fie)
236 return -EINVAL;
237
238 return check_which(fie->which) ? : check_pad(sd, fie->pad) ? :
239 check_cfg(fie->which, cfg) ? :
240 sd->ops->pad->enum_frame_interval(sd, cfg, fie);
241}
242
243static inline int check_selection(struct v4l2_subdev *sd,
244 struct v4l2_subdev_pad_config *cfg,
245 struct v4l2_subdev_selection *sel)
246{
247 if (!sel)
248 return -EINVAL;
249
250 return check_which(sel->which) ? : check_pad(sd, sel->pad) ? :
251 check_cfg(sel->which, cfg);
252}
253
254static int call_get_selection(struct v4l2_subdev *sd,
255 struct v4l2_subdev_pad_config *cfg,
256 struct v4l2_subdev_selection *sel)
257{
258 return check_selection(sd, cfg, sel) ? :
259 sd->ops->pad->get_selection(sd, cfg, sel);
260}
261
262static int call_set_selection(struct v4l2_subdev *sd,
263 struct v4l2_subdev_pad_config *cfg,
264 struct v4l2_subdev_selection *sel)
265{
266 return check_selection(sd, cfg, sel) ? :
267 sd->ops->pad->set_selection(sd, cfg, sel);
268}
269
270static inline int check_edid(struct v4l2_subdev *sd,
271 struct v4l2_subdev_edid *edid)
272{
273 if (!edid)
274 return -EINVAL;
275
276 if (edid->blocks && edid->edid == NULL)
277 return -EINVAL;
278
279 return check_pad(sd, edid->pad);
280}
281
282static int call_get_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
283{
284 return check_edid(sd, edid) ? : sd->ops->pad->get_edid(sd, edid);
285}
286
287static int call_set_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
288{
289 return check_edid(sd, edid) ? : sd->ops->pad->set_edid(sd, edid);
290}
291
292static int call_dv_timings_cap(struct v4l2_subdev *sd,
293 struct v4l2_dv_timings_cap *cap)
294{
295 if (!cap)
296 return -EINVAL;
297
298 return check_pad(sd, cap->pad) ? :
299 sd->ops->pad->dv_timings_cap(sd, cap);
300}
301
302static int call_enum_dv_timings(struct v4l2_subdev *sd,
303 struct v4l2_enum_dv_timings *dvt)
304{
305 if (!dvt)
306 return -EINVAL;
307
308 return check_pad(sd, dvt->pad) ? :
309 sd->ops->pad->enum_dv_timings(sd, dvt);
310}
311
312static const struct v4l2_subdev_pad_ops v4l2_subdev_call_pad_wrappers = {
313 .get_fmt = call_get_fmt,
314 .set_fmt = call_set_fmt,
315 .enum_mbus_code = call_enum_mbus_code,
316 .enum_frame_size = call_enum_frame_size,
317 .enum_frame_interval = call_enum_frame_interval,
318 .get_selection = call_get_selection,
319 .set_selection = call_set_selection,
320 .get_edid = call_get_edid,
321 .set_edid = call_set_edid,
322 .dv_timings_cap = call_dv_timings_cap,
323 .enum_dv_timings = call_enum_dv_timings,
324};
325
326static const struct v4l2_subdev_video_ops v4l2_subdev_call_video_wrappers = {
327 .g_frame_interval = call_g_frame_interval,
328 .s_frame_interval = call_s_frame_interval,
329};
330
331const struct v4l2_subdev_ops v4l2_subdev_call_wrappers = {
332 .pad = &v4l2_subdev_call_pad_wrappers,
333 .video = &v4l2_subdev_call_video_wrappers,
334};
335EXPORT_SYMBOL(v4l2_subdev_call_wrappers);
336
337#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
338static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
339{
340 struct video_device *vdev = video_devdata(file);
341 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
342 struct v4l2_fh *vfh = file->private_data;
343 struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
344 bool ro_subdev = test_bit(V4L2_FL_SUBDEV_RO_DEVNODE, &vdev->flags);
345 int rval;
346
347 switch (cmd) {
348 case VIDIOC_SUBDEV_QUERYCAP: {
349 struct v4l2_subdev_capability *cap = arg;
350
351 memset(cap->reserved, 0, sizeof(cap->reserved));
352 cap->version = LINUX_VERSION_CODE;
353 cap->capabilities = ro_subdev ? V4L2_SUBDEV_CAP_RO_SUBDEV : 0;
354
355 return 0;
356 }
357
358 case VIDIOC_QUERYCTRL:
359 /*
360 * TODO: this really should be folded into v4l2_queryctrl (this
361 * currently returns -EINVAL for NULL control handlers).
362 * However, v4l2_queryctrl() is still called directly by
363 * drivers as well and until that has been addressed I believe
364 * it is safer to do the check here. The same is true for the
365 * other control ioctls below.
366 */
367 if (!vfh->ctrl_handler)
368 return -ENOTTY;
369 return v4l2_queryctrl(vfh->ctrl_handler, arg);
370
371 case VIDIOC_QUERY_EXT_CTRL:
372 if (!vfh->ctrl_handler)
373 return -ENOTTY;
374 return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);
375
376 case VIDIOC_QUERYMENU:
377 if (!vfh->ctrl_handler)
378 return -ENOTTY;
379 return v4l2_querymenu(vfh->ctrl_handler, arg);
380
381 case VIDIOC_G_CTRL:
382 if (!vfh->ctrl_handler)
383 return -ENOTTY;
384 return v4l2_g_ctrl(vfh->ctrl_handler, arg);
385
386 case VIDIOC_S_CTRL:
387 if (!vfh->ctrl_handler)
388 return -ENOTTY;
389 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
390
391 case VIDIOC_G_EXT_CTRLS:
392 if (!vfh->ctrl_handler)
393 return -ENOTTY;
394 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
395 vdev, sd->v4l2_dev->mdev, arg);
396
397 case VIDIOC_S_EXT_CTRLS:
398 if (!vfh->ctrl_handler)
399 return -ENOTTY;
400 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
401 vdev, sd->v4l2_dev->mdev, arg);
402
403 case VIDIOC_TRY_EXT_CTRLS:
404 if (!vfh->ctrl_handler)
405 return -ENOTTY;
406 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
407 vdev, sd->v4l2_dev->mdev, arg);
408
409 case VIDIOC_DQEVENT:
410 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
411 return -ENOIOCTLCMD;
412
413 return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
414
415 case VIDIOC_DQEVENT_TIME32: {
416 struct v4l2_event_time32 *ev32 = arg;
417 struct v4l2_event ev = { };
418
419 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
420 return -ENOIOCTLCMD;
421
422 rval = v4l2_event_dequeue(vfh, &ev, file->f_flags & O_NONBLOCK);
423
424 *ev32 = (struct v4l2_event_time32) {
425 .type = ev.type,
426 .pending = ev.pending,
427 .sequence = ev.sequence,
428 .timestamp.tv_sec = ev.timestamp.tv_sec,
429 .timestamp.tv_nsec = ev.timestamp.tv_nsec,
430 .id = ev.id,
431 };
432
433 memcpy(&ev32->u, &ev.u, sizeof(ev.u));
434 memcpy(&ev32->reserved, &ev.reserved, sizeof(ev.reserved));
435
436 return rval;
437 }
438
439 case VIDIOC_SUBSCRIBE_EVENT:
440 return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
441
442 case VIDIOC_UNSUBSCRIBE_EVENT:
443 return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
444
445#ifdef CONFIG_VIDEO_ADV_DEBUG
446 case VIDIOC_DBG_G_REGISTER:
447 {
448 struct v4l2_dbg_register *p = arg;
449
450 if (!capable(CAP_SYS_ADMIN))
451 return -EPERM;
452 return v4l2_subdev_call(sd, core, g_register, p);
453 }
454 case VIDIOC_DBG_S_REGISTER:
455 {
456 struct v4l2_dbg_register *p = arg;
457
458 if (!capable(CAP_SYS_ADMIN))
459 return -EPERM;
460 return v4l2_subdev_call(sd, core, s_register, p);
461 }
462 case VIDIOC_DBG_G_CHIP_INFO:
463 {
464 struct v4l2_dbg_chip_info *p = arg;
465
466 if (p->match.type != V4L2_CHIP_MATCH_SUBDEV || p->match.addr)
467 return -EINVAL;
468 if (sd->ops->core && sd->ops->core->s_register)
469 p->flags |= V4L2_CHIP_FL_WRITABLE;
470 if (sd->ops->core && sd->ops->core->g_register)
471 p->flags |= V4L2_CHIP_FL_READABLE;
472 strscpy(p->name, sd->name, sizeof(p->name));
473 return 0;
474 }
475#endif
476
477 case VIDIOC_LOG_STATUS: {
478 int ret;
479
480 pr_info("%s: ================= START STATUS =================\n",
481 sd->name);
482 ret = v4l2_subdev_call(sd, core, log_status);
483 pr_info("%s: ================== END STATUS ==================\n",
484 sd->name);
485 return ret;
486 }
487
488 case VIDIOC_SUBDEV_G_FMT: {
489 struct v4l2_subdev_format *format = arg;
490
491 memset(format->reserved, 0, sizeof(format->reserved));
492 memset(format->format.reserved, 0, sizeof(format->format.reserved));
493 return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh->pad, format);
494 }
495
496 case VIDIOC_SUBDEV_S_FMT: {
497 struct v4l2_subdev_format *format = arg;
498
499 if (format->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev)
500 return -EPERM;
501
502 memset(format->reserved, 0, sizeof(format->reserved));
503 memset(format->format.reserved, 0, sizeof(format->format.reserved));
504 return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh->pad, format);
505 }
506
507 case VIDIOC_SUBDEV_G_CROP: {
508 struct v4l2_subdev_crop *crop = arg;
509 struct v4l2_subdev_selection sel;
510
511 memset(crop->reserved, 0, sizeof(crop->reserved));
512 memset(&sel, 0, sizeof(sel));
513 sel.which = crop->which;
514 sel.pad = crop->pad;
515 sel.target = V4L2_SEL_TGT_CROP;
516
517 rval = v4l2_subdev_call(
518 sd, pad, get_selection, subdev_fh->pad, &sel);
519
520 crop->rect = sel.r;
521
522 return rval;
523 }
524
525 case VIDIOC_SUBDEV_S_CROP: {
526 struct v4l2_subdev_crop *crop = arg;
527 struct v4l2_subdev_selection sel;
528
529 if (crop->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev)
530 return -EPERM;
531
532 memset(crop->reserved, 0, sizeof(crop->reserved));
533 memset(&sel, 0, sizeof(sel));
534 sel.which = crop->which;
535 sel.pad = crop->pad;
536 sel.target = V4L2_SEL_TGT_CROP;
537 sel.r = crop->rect;
538
539 rval = v4l2_subdev_call(
540 sd, pad, set_selection, subdev_fh->pad, &sel);
541
542 crop->rect = sel.r;
543
544 return rval;
545 }
546
547 case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
548 struct v4l2_subdev_mbus_code_enum *code = arg;
549
550 memset(code->reserved, 0, sizeof(code->reserved));
551 return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh->pad,
552 code);
553 }
554
555 case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
556 struct v4l2_subdev_frame_size_enum *fse = arg;
557
558 memset(fse->reserved, 0, sizeof(fse->reserved));
559 return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh->pad,
560 fse);
561 }
562
563 case VIDIOC_SUBDEV_G_FRAME_INTERVAL: {
564 struct v4l2_subdev_frame_interval *fi = arg;
565
566 memset(fi->reserved, 0, sizeof(fi->reserved));
567 return v4l2_subdev_call(sd, video, g_frame_interval, arg);
568 }
569
570 case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
571 struct v4l2_subdev_frame_interval *fi = arg;
572
573 if (ro_subdev)
574 return -EPERM;
575
576 memset(fi->reserved, 0, sizeof(fi->reserved));
577 return v4l2_subdev_call(sd, video, s_frame_interval, arg);
578 }
579
580 case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
581 struct v4l2_subdev_frame_interval_enum *fie = arg;
582
583 memset(fie->reserved, 0, sizeof(fie->reserved));
584 return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad,
585 fie);
586 }
587
588 case VIDIOC_SUBDEV_G_SELECTION: {
589 struct v4l2_subdev_selection *sel = arg;
590
591 memset(sel->reserved, 0, sizeof(sel->reserved));
592 return v4l2_subdev_call(
593 sd, pad, get_selection, subdev_fh->pad, sel);
594 }
595
596 case VIDIOC_SUBDEV_S_SELECTION: {
597 struct v4l2_subdev_selection *sel = arg;
598
599 if (sel->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev)
600 return -EPERM;
601
602 memset(sel->reserved, 0, sizeof(sel->reserved));
603 return v4l2_subdev_call(
604 sd, pad, set_selection, subdev_fh->pad, sel);
605 }
606
607 case VIDIOC_G_EDID: {
608 struct v4l2_subdev_edid *edid = arg;
609
610 return v4l2_subdev_call(sd, pad, get_edid, edid);
611 }
612
613 case VIDIOC_S_EDID: {
614 struct v4l2_subdev_edid *edid = arg;
615
616 return v4l2_subdev_call(sd, pad, set_edid, edid);
617 }
618
619 case VIDIOC_SUBDEV_DV_TIMINGS_CAP: {
620 struct v4l2_dv_timings_cap *cap = arg;
621
622 return v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
623 }
624
625 case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: {
626 struct v4l2_enum_dv_timings *dvt = arg;
627
628 return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt);
629 }
630
631 case VIDIOC_SUBDEV_QUERY_DV_TIMINGS:
632 return v4l2_subdev_call(sd, video, query_dv_timings, arg);
633
634 case VIDIOC_SUBDEV_G_DV_TIMINGS:
635 return v4l2_subdev_call(sd, video, g_dv_timings, arg);
636
637 case VIDIOC_SUBDEV_S_DV_TIMINGS:
638 if (ro_subdev)
639 return -EPERM;
640
641 return v4l2_subdev_call(sd, video, s_dv_timings, arg);
642
643 case VIDIOC_SUBDEV_G_STD:
644 return v4l2_subdev_call(sd, video, g_std, arg);
645
646 case VIDIOC_SUBDEV_S_STD: {
647 v4l2_std_id *std = arg;
648
649 if (ro_subdev)
650 return -EPERM;
651
652 return v4l2_subdev_call(sd, video, s_std, *std);
653 }
654
655 case VIDIOC_SUBDEV_ENUMSTD: {
656 struct v4l2_standard *p = arg;
657 v4l2_std_id id;
658
659 if (v4l2_subdev_call(sd, video, g_tvnorms, &id))
660 return -EINVAL;
661
662 return v4l_video_std_enumstd(p, id);
663 }
664
665 case VIDIOC_SUBDEV_QUERYSTD:
666 return v4l2_subdev_call(sd, video, querystd, arg);
667
668 default:
669 return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
670 }
671
672 return 0;
673}
674
675static long subdev_do_ioctl_lock(struct file *file, unsigned int cmd, void *arg)
676{
677 struct video_device *vdev = video_devdata(file);
678 struct mutex *lock = vdev->lock;
679 long ret = -ENODEV;
680
681 if (lock && mutex_lock_interruptible(lock))
682 return -ERESTARTSYS;
683 if (video_is_registered(vdev))
684 ret = subdev_do_ioctl(file, cmd, arg);
685 if (lock)
686 mutex_unlock(lock);
687 return ret;
688}
689
690static long subdev_ioctl(struct file *file, unsigned int cmd,
691 unsigned long arg)
692{
693 return video_usercopy(file, cmd, arg, subdev_do_ioctl_lock);
694}
695
696#ifdef CONFIG_COMPAT
697static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
698 unsigned long arg)
699{
700 struct video_device *vdev = video_devdata(file);
701 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
702
703 return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg);
704}
705#endif
706
707#else /* CONFIG_VIDEO_V4L2_SUBDEV_API */
708static long subdev_ioctl(struct file *file, unsigned int cmd,
709 unsigned long arg)
710{
711 return -ENODEV;
712}
713
714#ifdef CONFIG_COMPAT
715static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
716 unsigned long arg)
717{
718 return -ENODEV;
719}
720#endif
721#endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */
722
723static __poll_t subdev_poll(struct file *file, poll_table *wait)
724{
725 struct video_device *vdev = video_devdata(file);
726 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
727 struct v4l2_fh *fh = file->private_data;
728
729 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
730 return EPOLLERR;
731
732 poll_wait(file, &fh->wait, wait);
733
734 if (v4l2_event_pending(fh))
735 return EPOLLPRI;
736
737 return 0;
738}
739
740const struct v4l2_file_operations v4l2_subdev_fops = {
741 .owner = THIS_MODULE,
742 .open = subdev_open,
743 .unlocked_ioctl = subdev_ioctl,
744#ifdef CONFIG_COMPAT
745 .compat_ioctl32 = subdev_compat_ioctl32,
746#endif
747 .release = subdev_close,
748 .poll = subdev_poll,
749};
750
751#ifdef CONFIG_MEDIA_CONTROLLER
752
753int v4l2_subdev_get_fwnode_pad_1_to_1(struct media_entity *entity,
754 struct fwnode_endpoint *endpoint)
755{
756 struct fwnode_handle *fwnode;
757 struct v4l2_subdev *sd;
758
759 if (!is_media_entity_v4l2_subdev(entity))
760 return -EINVAL;
761
762 sd = media_entity_to_v4l2_subdev(entity);
763
764 fwnode = fwnode_graph_get_port_parent(endpoint->local_fwnode);
765 fwnode_handle_put(fwnode);
766
767 if (dev_fwnode(sd->dev) == fwnode)
768 return endpoint->port;
769
770 return -ENXIO;
771}
772EXPORT_SYMBOL_GPL(v4l2_subdev_get_fwnode_pad_1_to_1);
773
774int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
775 struct media_link *link,
776 struct v4l2_subdev_format *source_fmt,
777 struct v4l2_subdev_format *sink_fmt)
778{
779 /* The width, height and code must match. */
780 if (source_fmt->format.width != sink_fmt->format.width
781 || source_fmt->format.height != sink_fmt->format.height
782 || source_fmt->format.code != sink_fmt->format.code)
783 return -EPIPE;
784
785 /* The field order must match, or the sink field order must be NONE
786 * to support interlaced hardware connected to bridges that support
787 * progressive formats only.
788 */
789 if (source_fmt->format.field != sink_fmt->format.field &&
790 sink_fmt->format.field != V4L2_FIELD_NONE)
791 return -EPIPE;
792
793 return 0;
794}
795EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default);
796
797static int
798v4l2_subdev_link_validate_get_format(struct media_pad *pad,
799 struct v4l2_subdev_format *fmt)
800{
801 if (is_media_entity_v4l2_subdev(pad->entity)) {
802 struct v4l2_subdev *sd =
803 media_entity_to_v4l2_subdev(pad->entity);
804
805 fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
806 fmt->pad = pad->index;
807 return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
808 }
809
810 WARN(pad->entity->function != MEDIA_ENT_F_IO_V4L,
811 "Driver bug! Wrong media entity type 0x%08x, entity %s\n",
812 pad->entity->function, pad->entity->name);
813
814 return -EINVAL;
815}
816
817int v4l2_subdev_link_validate(struct media_link *link)
818{
819 struct v4l2_subdev *sink;
820 struct v4l2_subdev_format sink_fmt, source_fmt;
821 int rval;
822
823 rval = v4l2_subdev_link_validate_get_format(
824 link->source, &source_fmt);
825 if (rval < 0)
826 return 0;
827
828 rval = v4l2_subdev_link_validate_get_format(
829 link->sink, &sink_fmt);
830 if (rval < 0)
831 return 0;
832
833 sink = media_entity_to_v4l2_subdev(link->sink->entity);
834
835 rval = v4l2_subdev_call(sink, pad, link_validate, link,
836 &source_fmt, &sink_fmt);
837 if (rval != -ENOIOCTLCMD)
838 return rval;
839
840 return v4l2_subdev_link_validate_default(
841 sink, link, &source_fmt, &sink_fmt);
842}
843EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
844
845struct v4l2_subdev_pad_config *
846v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd)
847{
848 struct v4l2_subdev_pad_config *cfg;
849 int ret;
850
851 if (!sd->entity.num_pads)
852 return NULL;
853
854 cfg = kvmalloc_array(sd->entity.num_pads, sizeof(*cfg),
855 GFP_KERNEL | __GFP_ZERO);
856 if (!cfg)
857 return NULL;
858
859 ret = v4l2_subdev_call(sd, pad, init_cfg, cfg);
860 if (ret < 0 && ret != -ENOIOCTLCMD) {
861 kvfree(cfg);
862 return NULL;
863 }
864
865 return cfg;
866}
867EXPORT_SYMBOL_GPL(v4l2_subdev_alloc_pad_config);
868
869void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg)
870{
871 kvfree(cfg);
872}
873EXPORT_SYMBOL_GPL(v4l2_subdev_free_pad_config);
874#endif /* CONFIG_MEDIA_CONTROLLER */
875
876void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
877{
878 INIT_LIST_HEAD(&sd->list);
879 BUG_ON(!ops);
880 sd->ops = ops;
881 sd->v4l2_dev = NULL;
882 sd->flags = 0;
883 sd->name[0] = '\0';
884 sd->grp_id = 0;
885 sd->dev_priv = NULL;
886 sd->host_priv = NULL;
887#if defined(CONFIG_MEDIA_CONTROLLER)
888 sd->entity.name = sd->name;
889 sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV;
890 sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
891#endif
892}
893EXPORT_SYMBOL(v4l2_subdev_init);
894
895void v4l2_subdev_notify_event(struct v4l2_subdev *sd,
896 const struct v4l2_event *ev)
897{
898 v4l2_event_queue(sd->devnode, ev);
899 v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT, (void *)ev);
900}
901EXPORT_SYMBOL_GPL(v4l2_subdev_notify_event);