1	// SPDX-License-Identifier: GPL-2.0-or-later
2	/*
3	* Video capture interface for Linux version 2
4	*
5	* A generic framework to process V4L2 ioctl commands.
6	*
7	* Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
8	* Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
9	*/
10
11	#include <linux/compat.h>
12	#include <linux/mm.h>
13	#include <linux/module.h>
14	#include <linux/slab.h>
15	#include <linux/types.h>
16	#include <linux/kernel.h>
17	#include <linux/version.h>
18
19	#include <linux/v4l2-subdev.h>
20	#include <linux/videodev2.h>
21
22	#include <media/media-device.h> /* for media_set_bus_info() */
23	#include <media/v4l2-common.h>
24	#include <media/v4l2-ioctl.h>
25	#include <media/v4l2-ctrls.h>
26	#include <media/v4l2-fh.h>
27	#include <media/v4l2-event.h>
28	#include <media/v4l2-device.h>
29	#include <media/videobuf2-v4l2.h>
30	#include <media/v4l2-mc.h>
31	#include <media/v4l2-mem2mem.h>
32
33	#include <trace/events/v4l2.h>
34
35	#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
36
37	struct std_descr {
38	v4l2_std_id std;
39	const char *descr;
40	};
41
42	static const struct std_descr standards[] = {
43	{ V4L2_STD_NTSC, "NTSC" },
44	{ V4L2_STD_NTSC_M, "NTSC-M" },
45	{ V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
46	{ V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
47	{ V4L2_STD_NTSC_443, "NTSC-443" },
48	{ V4L2_STD_PAL, "PAL" },
49	{ V4L2_STD_PAL_BG, "PAL-BG" },
50	{ V4L2_STD_PAL_B, "PAL-B" },
51	{ V4L2_STD_PAL_B1, "PAL-B1" },
52	{ V4L2_STD_PAL_G, "PAL-G" },
53	{ V4L2_STD_PAL_H, "PAL-H" },
54	{ V4L2_STD_PAL_I, "PAL-I" },
55	{ V4L2_STD_PAL_DK, "PAL-DK" },
56	{ V4L2_STD_PAL_D, "PAL-D" },
57	{ V4L2_STD_PAL_D1, "PAL-D1" },
58	{ V4L2_STD_PAL_K, "PAL-K" },
59	{ V4L2_STD_PAL_M, "PAL-M" },
60	{ V4L2_STD_PAL_N, "PAL-N" },
61	{ V4L2_STD_PAL_Nc, "PAL-Nc" },
62	{ V4L2_STD_PAL_60, "PAL-60" },
63	{ V4L2_STD_SECAM, "SECAM" },
64	{ V4L2_STD_SECAM_B, "SECAM-B" },
65	{ V4L2_STD_SECAM_G, "SECAM-G" },
66	{ V4L2_STD_SECAM_H, "SECAM-H" },
67	{ V4L2_STD_SECAM_DK, "SECAM-DK" },
68	{ V4L2_STD_SECAM_D, "SECAM-D" },
69	{ V4L2_STD_SECAM_K, "SECAM-K" },
70	{ V4L2_STD_SECAM_K1, "SECAM-K1" },
71	{ V4L2_STD_SECAM_L, "SECAM-L" },
72	{ V4L2_STD_SECAM_LC, "SECAM-Lc" },
73	{ 0, "Unknown" }
74	};
75
76	/* video4linux standard ID conversion to standard name
77	*/
78	const char *v4l2_norm_to_name(v4l2_std_id id)
79	{
80	u32 myid = id;
81	int i;
82
83	/* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
84	64 bit comparisons. So, on that architecture, with some gcc
85	variants, compilation fails. Currently, the max value is 30bit wide.
86	*/
87	BUG_ON(myid != id);
88
89	for (i = 0; standards[i].std; i++)
90	if (myid == standards[i].std)
91	break;
92	return standards[i].descr;
93	}
94	EXPORT_SYMBOL(v4l2_norm_to_name);
95
96	/* Returns frame period for the given standard */
97	void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
98	{
99	if (id & V4L2_STD_525_60) {
100	frameperiod->numerator = 1001;
101	frameperiod->denominator = 30000;
102	} else {
103	frameperiod->numerator = 1;
104	frameperiod->denominator = 25;
105	}
106	}
107	EXPORT_SYMBOL(v4l2_video_std_frame_period);
108
109	/* Fill in the fields of a v4l2_standard structure according to the
110	'id' and 'transmission' parameters. Returns negative on error. */
111	int v4l2_video_std_construct(struct v4l2_standard *vs,
112	int id, const char *name)
113	{
114	vs->id = id;
115	v4l2_video_std_frame_period(id, &vs->frameperiod);
116	vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
117	strscpy(vs->name, name, sizeof(vs->name));
118	return 0;
119	}
120	EXPORT_SYMBOL(v4l2_video_std_construct);
121
122	/* Fill in the fields of a v4l2_standard structure according to the
123	* 'id' and 'vs->index' parameters. Returns negative on error. */
124	int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
125	{
126	v4l2_std_id curr_id = 0;
127	unsigned int index = vs->index, i, j = 0;
128	const char *descr = "";
129
130	/* Return -ENODATA if the id for the current input
131	or output is 0, meaning that it doesn't support this API. */
132	if (id == 0)
133	return -ENODATA;
134
135	/* Return norm array in a canonical way */
136	for (i = 0; i <= index && id; i++) {
137	/* last std value in the standards array is 0, so this
138	while always ends there since (id & 0) == 0. */
139	while ((id & standards[j].std) != standards[j].std)
140	j++;
141	curr_id = standards[j].std;
142	descr = standards[j].descr;
143	j++;
144	if (curr_id == 0)
145	break;
146	if (curr_id != V4L2_STD_PAL &&
147	curr_id != V4L2_STD_SECAM &&
148	curr_id != V4L2_STD_NTSC)
149	id &= ~curr_id;
150	}
151	if (i <= index)
152	return -EINVAL;
153
154	v4l2_video_std_construct(vs, curr_id, descr);
155	return 0;
156	}
157
158	/* ----------------------------------------------------------------- */
159	/* some arrays for pretty-printing debug messages of enum types */
160
161	const char *v4l2_field_names[] = {
162	[V4L2_FIELD_ANY] = "any",
163	[V4L2_FIELD_NONE] = "none",
164	[V4L2_FIELD_TOP] = "top",
165	[V4L2_FIELD_BOTTOM] = "bottom",
166	[V4L2_FIELD_INTERLACED] = "interlaced",
167	[V4L2_FIELD_SEQ_TB] = "seq-tb",
168	[V4L2_FIELD_SEQ_BT] = "seq-bt",
169	[V4L2_FIELD_ALTERNATE] = "alternate",
170	[V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
171	[V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
172	};
173	EXPORT_SYMBOL(v4l2_field_names);
174
175	const char *v4l2_type_names[] = {
176	[0] = "0",
177	[V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
178	[V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
179	[V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
180	[V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
181	[V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
182	[V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
183	[V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
184	[V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
185	[V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
186	[V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
187	[V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap",
188	[V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out",
189	[V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap",
190	[V4L2_BUF_TYPE_META_OUTPUT] = "meta-out",
191	};
192	EXPORT_SYMBOL(v4l2_type_names);
193
194	static const char *v4l2_memory_names[] = {
195	[V4L2_MEMORY_MMAP] = "mmap",
196	[V4L2_MEMORY_USERPTR] = "userptr",
197	[V4L2_MEMORY_OVERLAY] = "overlay",
198	[V4L2_MEMORY_DMABUF] = "dmabuf",
199	};
200
201	#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
202
203	/* ------------------------------------------------------------------ */
204	/* debug help functions */
205
206	static void v4l_print_querycap(const void *arg, bool write_only)
207	{
208	const struct v4l2_capability *p = arg;
209
210	pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
211	(int)sizeof(p->driver), p->driver,
212	(int)sizeof(p->card), p->card,
213	(int)sizeof(p->bus_info), p->bus_info,
214	p->version, p->capabilities, p->device_caps);
215	}
216
217	static void v4l_print_enuminput(const void *arg, bool write_only)
218	{
219	const struct v4l2_input *p = arg;
220
221	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
222	p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
223	p->tuner, (unsigned long long)p->std, p->status,
224	p->capabilities);
225	}
226
227	static void v4l_print_enumoutput(const void *arg, bool write_only)
228	{
229	const struct v4l2_output *p = arg;
230
231	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
232	p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
233	p->modulator, (unsigned long long)p->std, p->capabilities);
234	}
235
236	static void v4l_print_audio(const void *arg, bool write_only)
237	{
238	const struct v4l2_audio *p = arg;
239
240	if (write_only)
241	pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
242	else
243	pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
244	p->index, (int)sizeof(p->name), p->name,
245	p->capability, p->mode);
246	}
247
248	static void v4l_print_audioout(const void *arg, bool write_only)
249	{
250	const struct v4l2_audioout *p = arg;
251
252	if (write_only)
253	pr_cont("index=%u\n", p->index);
254	else
255	pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
256	p->index, (int)sizeof(p->name), p->name,
257	p->capability, p->mode);
258	}
259
260	static void v4l_print_fmtdesc(const void *arg, bool write_only)
261	{
262	const struct v4l2_fmtdesc *p = arg;
263
264	pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
265	p->index, prt_names(p->type, v4l2_type_names),
266	p->flags, &p->pixelformat, p->mbus_code,
267	(int)sizeof(p->description), p->description);
268	}
269
270	static void v4l_print_format(const void *arg, bool write_only)
271	{
272	const struct v4l2_format *p = arg;
273	const struct v4l2_pix_format *pix;
274	const struct v4l2_pix_format_mplane *mp;
275	const struct v4l2_vbi_format *vbi;
276	const struct v4l2_sliced_vbi_format *sliced;
277	const struct v4l2_window *win;
278	const struct v4l2_meta_format *meta;
279	u32 pixelformat;
280	u32 planes;
281	unsigned i;
282
283	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
284	switch (p->type) {
285	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
286	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
287	pix = &p->fmt.pix;
288	pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
289	pix->width, pix->height, &pix->pixelformat,
290	prt_names(pix->field, v4l2_field_names),
291	pix->bytesperline, pix->sizeimage,
292	pix->colorspace, pix->flags, pix->ycbcr_enc,
293	pix->quantization, pix->xfer_func);
294	break;
295	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
296	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
297	mp = &p->fmt.pix_mp;
298	pixelformat = mp->pixelformat;
299	pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
300	mp->width, mp->height, &pixelformat,
301	prt_names(mp->field, v4l2_field_names),
302	mp->colorspace, mp->num_planes, mp->flags,
303	mp->ycbcr_enc, mp->quantization, mp->xfer_func);
304	planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
305	for (i = 0; i < planes; i++)
306	printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
307	mp->plane_fmt[i].bytesperline,
308	mp->plane_fmt[i].sizeimage);
309	break;
310	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
311	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
312	win = &p->fmt.win;
313	pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, global_alpha=0x%02x\n",
314	win->w.width, win->w.height, win->w.left, win->w.top,
315	prt_names(win->field, v4l2_field_names),
316	win->chromakey, win->global_alpha);
317	break;
318	case V4L2_BUF_TYPE_VBI_CAPTURE:
319	case V4L2_BUF_TYPE_VBI_OUTPUT:
320	vbi = &p->fmt.vbi;
321	pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
322	vbi->sampling_rate, vbi->offset,
323	vbi->samples_per_line, &vbi->sample_format,
324	vbi->start[0], vbi->start[1],
325	vbi->count[0], vbi->count[1]);
326	break;
327	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
328	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
329	sliced = &p->fmt.sliced;
330	pr_cont(", service_set=0x%08x, io_size=%d\n",
331	sliced->service_set, sliced->io_size);
332	for (i = 0; i < 24; i++)
333	printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
334	sliced->service_lines[0][i],
335	sliced->service_lines[1][i]);
336	break;
337	case V4L2_BUF_TYPE_SDR_CAPTURE:
338	case V4L2_BUF_TYPE_SDR_OUTPUT:
339	pixelformat = p->fmt.sdr.pixelformat;
340	pr_cont(", pixelformat=%p4cc\n", &pixelformat);
341	break;
342	case V4L2_BUF_TYPE_META_CAPTURE:
343	case V4L2_BUF_TYPE_META_OUTPUT:
344	meta = &p->fmt.meta;
345	pixelformat = meta->dataformat;
346	pr_cont(", dataformat=%p4cc, buffersize=%u\n",
347	&pixelformat, meta->buffersize);
348	break;
349	}
350	}
351
352	static void v4l_print_framebuffer(const void *arg, bool write_only)
353	{
354	const struct v4l2_framebuffer *p = arg;
355
356	pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
357	p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
358	&p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
359	p->fmt.colorspace);
360	}
361
362	static void v4l_print_buftype(const void *arg, bool write_only)
363	{
364	pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
365	}
366
367	static void v4l_print_modulator(const void *arg, bool write_only)
368	{
369	const struct v4l2_modulator *p = arg;
370
371	if (write_only)
372	pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
373	else
374	pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
375	p->index, (int)sizeof(p->name), p->name, p->capability,
376	p->rangelow, p->rangehigh, p->txsubchans);
377	}
378
379	static void v4l_print_tuner(const void *arg, bool write_only)
380	{
381	const struct v4l2_tuner *p = arg;
382
383	if (write_only)
384	pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
385	else
386	pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n",
387	p->index, (int)sizeof(p->name), p->name, p->type,
388	p->capability, p->rangelow,
389	p->rangehigh, p->signal, p->afc,
390	p->rxsubchans, p->audmode);
391	}
392
393	static void v4l_print_frequency(const void *arg, bool write_only)
394	{
395	const struct v4l2_frequency *p = arg;
396
397	pr_cont("tuner=%u, type=%u, frequency=%u\n",
398	p->tuner, p->type, p->frequency);
399	}
400
401	static void v4l_print_standard(const void *arg, bool write_only)
402	{
403	const struct v4l2_standard *p = arg;
404
405	pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
406	p->index,
407	(unsigned long long)p->id, (int)sizeof(p->name), p->name,
408	p->frameperiod.numerator,
409	p->frameperiod.denominator,
410	p->framelines);
411	}
412
413	static void v4l_print_std(const void *arg, bool write_only)
414	{
415	pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
416	}
417
418	static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
419	{
420	const struct v4l2_hw_freq_seek *p = arg;
421
422	pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
423	p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
424	p->rangelow, p->rangehigh);
425	}
426
427	static void v4l_print_requestbuffers(const void *arg, bool write_only)
428	{
429	const struct v4l2_requestbuffers *p = arg;
430
431	pr_cont("count=%d, type=%s, memory=%s\n",
432	p->count,
433	prt_names(p->type, v4l2_type_names),
434	prt_names(p->memory, v4l2_memory_names));
435	}
436
437	static void v4l_print_buffer(const void *arg, bool write_only)
438	{
439	const struct v4l2_buffer *p = arg;
440	const struct v4l2_timecode *tc = &p->timecode;
441	const struct v4l2_plane *plane;
442	int i;
443
444	pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
445	(int)p->timestamp.tv_sec / 3600,
446	((int)p->timestamp.tv_sec / 60) % 60,
447	((int)p->timestamp.tv_sec % 60),
448	(long)p->timestamp.tv_usec,
449	p->index,
450	prt_names(p->type, v4l2_type_names), p->request_fd,
451	p->flags, prt_names(p->field, v4l2_field_names),
452	p->sequence, prt_names(p->memory, v4l2_memory_names));
453
454	if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
455	pr_cont("\n");
456	for (i = 0; i < p->length; ++i) {
457	plane = &p->m.planes[i];
458	printk(KERN_DEBUG
459	"plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
460	i, plane->bytesused, plane->data_offset,
461	plane->m.userptr, plane->length);
462	}
463	} else {
464	pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
465	p->bytesused, p->m.userptr, p->length);
466	}
467
468	printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
469	tc->hours, tc->minutes, tc->seconds,
470	tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
471	}
472
473	static void v4l_print_exportbuffer(const void *arg, bool write_only)
474	{
475	const struct v4l2_exportbuffer *p = arg;
476
477	pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
478	p->fd, prt_names(p->type, v4l2_type_names),
479	p->index, p->plane, p->flags);
480	}
481
482	static void v4l_print_create_buffers(const void *arg, bool write_only)
483	{
484	const struct v4l2_create_buffers *p = arg;
485
486	pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, max num buffers=%u",
487	p->index, p->count, prt_names(p->memory, v4l2_memory_names),
488	p->capabilities, p->max_num_buffers);
489	v4l_print_format(arg: &p->format, write_only);
490	}
491
492	static void v4l_print_streamparm(const void *arg, bool write_only)
493	{
494	const struct v4l2_streamparm *p = arg;
495
496	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
497
498	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
499	p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
500	const struct v4l2_captureparm *c = &p->parm.capture;
501
502	pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
503	c->capability, c->capturemode,
504	c->timeperframe.numerator, c->timeperframe.denominator,
505	c->extendedmode, c->readbuffers);
506	} else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
507	p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
508	const struct v4l2_outputparm *c = &p->parm.output;
509
510	pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
511	c->capability, c->outputmode,
512	c->timeperframe.numerator, c->timeperframe.denominator,
513	c->extendedmode, c->writebuffers);
514	} else {
515	pr_cont("\n");
516	}
517	}
518
519	static void v4l_print_queryctrl(const void *arg, bool write_only)
520	{
521	const struct v4l2_queryctrl *p = arg;
522
523	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
524	p->id, p->type, (int)sizeof(p->name), p->name,
525	p->minimum, p->maximum,
526	p->step, p->default_value, p->flags);
527	}
528
529	static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
530	{
531	const struct v4l2_query_ext_ctrl *p = arg;
532
533	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
534	p->id, p->type, (int)sizeof(p->name), p->name,
535	p->minimum, p->maximum,
536	p->step, p->default_value, p->flags,
537	p->elem_size, p->elems, p->nr_of_dims,
538	p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
539	}
540
541	static void v4l_print_querymenu(const void *arg, bool write_only)
542	{
543	const struct v4l2_querymenu *p = arg;
544
545	pr_cont("id=0x%x, index=%d\n", p->id, p->index);
546	}
547
548	static void v4l_print_control(const void *arg, bool write_only)
549	{
550	const struct v4l2_control *p = arg;
551	const char *name = v4l2_ctrl_get_name(id: p->id);
552
553	if (name)
554	pr_cont("name=%s, ", name);
555	pr_cont("id=0x%x, value=%d\n", p->id, p->value);
556	}
557
558	static void v4l_print_ext_controls(const void *arg, bool write_only)
559	{
560	const struct v4l2_ext_controls *p = arg;
561	int i;
562
563	pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
564	p->which, p->count, p->error_idx, p->request_fd);
565	for (i = 0; i < p->count; i++) {
566	unsigned int id = p->controls[i].id;
567	const char *name = v4l2_ctrl_get_name(id);
568
569	if (name)
570	pr_cont(", name=%s", name);
571	if (!p->controls[i].size)
572	pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
573	else
574	pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
575	}
576	pr_cont("\n");
577	}
578
579	static void v4l_print_cropcap(const void *arg, bool write_only)
580	{
581	const struct v4l2_cropcap *p = arg;
582
583	pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
584	prt_names(p->type, v4l2_type_names),
585	p->bounds.width, p->bounds.height,
586	p->bounds.left, p->bounds.top,
587	p->defrect.width, p->defrect.height,
588	p->defrect.left, p->defrect.top,
589	p->pixelaspect.numerator, p->pixelaspect.denominator);
590	}
591
592	static void v4l_print_crop(const void *arg, bool write_only)
593	{
594	const struct v4l2_crop *p = arg;
595
596	pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
597	prt_names(p->type, v4l2_type_names),
598	p->c.width, p->c.height,
599	p->c.left, p->c.top);
600	}
601
602	static void v4l_print_selection(const void *arg, bool write_only)
603	{
604	const struct v4l2_selection *p = arg;
605
606	pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
607	prt_names(p->type, v4l2_type_names),
608	p->target, p->flags,
609	p->r.width, p->r.height, p->r.left, p->r.top);
610	}
611
612	static void v4l_print_jpegcompression(const void *arg, bool write_only)
613	{
614	const struct v4l2_jpegcompression *p = arg;
615
616	pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
617	p->quality, p->APPn, p->APP_len,
618	p->COM_len, p->jpeg_markers);
619	}
620
621	static void v4l_print_enc_idx(const void *arg, bool write_only)
622	{
623	const struct v4l2_enc_idx *p = arg;
624
625	pr_cont("entries=%d, entries_cap=%d\n",
626	p->entries, p->entries_cap);
627	}
628
629	static void v4l_print_encoder_cmd(const void *arg, bool write_only)
630	{
631	const struct v4l2_encoder_cmd *p = arg;
632
633	pr_cont("cmd=%d, flags=0x%x\n",
634	p->cmd, p->flags);
635	}
636
637	static void v4l_print_decoder_cmd(const void *arg, bool write_only)
638	{
639	const struct v4l2_decoder_cmd *p = arg;
640
641	pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
642
643	if (p->cmd == V4L2_DEC_CMD_START)
644	pr_info("speed=%d, format=%u\n",
645	p->start.speed, p->start.format);
646	else if (p->cmd == V4L2_DEC_CMD_STOP)
647	pr_info("pts=%llu\n", p->stop.pts);
648	}
649
650	static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
651	{
652	const struct v4l2_dbg_chip_info *p = arg;
653
654	pr_cont("type=%u, ", p->match.type);
655	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
656	pr_cont("name=%.*s, ",
657	(int)sizeof(p->match.name), p->match.name);
658	else
659	pr_cont("addr=%u, ", p->match.addr);
660	pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
661	}
662
663	static void v4l_print_dbg_register(const void *arg, bool write_only)
664	{
665	const struct v4l2_dbg_register *p = arg;
666
667	pr_cont("type=%u, ", p->match.type);
668	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
669	pr_cont("name=%.*s, ",
670	(int)sizeof(p->match.name), p->match.name);
671	else
672	pr_cont("addr=%u, ", p->match.addr);
673	pr_cont("reg=0x%llx, val=0x%llx\n",
674	p->reg, p->val);
675	}
676
677	static void v4l_print_dv_timings(const void *arg, bool write_only)
678	{
679	const struct v4l2_dv_timings *p = arg;
680
681	switch (p->type) {
682	case V4L2_DV_BT_656_1120:
683	pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
684	p->bt.interlaced, p->bt.pixelclock,
685	p->bt.width, p->bt.height,
686	p->bt.polarities, p->bt.hfrontporch,
687	p->bt.hsync, p->bt.hbackporch,
688	p->bt.vfrontporch, p->bt.vsync,
689	p->bt.vbackporch, p->bt.il_vfrontporch,
690	p->bt.il_vsync, p->bt.il_vbackporch,
691	p->bt.standards, p->bt.flags);
692	break;
693	default:
694	pr_cont("type=%d\n", p->type);
695	break;
696	}
697	}
698
699	static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
700	{
701	const struct v4l2_enum_dv_timings *p = arg;
702
703	pr_cont("index=%u, ", p->index);
704	v4l_print_dv_timings(arg: &p->timings, write_only);
705	}
706
707	static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
708	{
709	const struct v4l2_dv_timings_cap *p = arg;
710
711	switch (p->type) {
712	case V4L2_DV_BT_656_1120:
713	pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
714	p->bt.min_width, p->bt.max_width,
715	p->bt.min_height, p->bt.max_height,
716	p->bt.min_pixelclock, p->bt.max_pixelclock,
717	p->bt.standards, p->bt.capabilities);
718	break;
719	default:
720	pr_cont("type=%u\n", p->type);
721	break;
722	}
723	}
724
725	static void v4l_print_frmsizeenum(const void *arg, bool write_only)
726	{
727	const struct v4l2_frmsizeenum *p = arg;
728
729	pr_cont("index=%u, pixelformat=%p4cc, type=%u",
730	p->index, &p->pixel_format, p->type);
731	switch (p->type) {
732	case V4L2_FRMSIZE_TYPE_DISCRETE:
733	pr_cont(", wxh=%ux%u\n",
734	p->discrete.width, p->discrete.height);
735	break;
736	case V4L2_FRMSIZE_TYPE_STEPWISE:
737	pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
738	p->stepwise.min_width,
739	p->stepwise.min_height,
740	p->stepwise.max_width,
741	p->stepwise.max_height,
742	p->stepwise.step_width,
743	p->stepwise.step_height);
744	break;
745	case V4L2_FRMSIZE_TYPE_CONTINUOUS:
746	default:
747	pr_cont("\n");
748	break;
749	}
750	}
751
752	static void v4l_print_frmivalenum(const void *arg, bool write_only)
753	{
754	const struct v4l2_frmivalenum *p = arg;
755
756	pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
757	p->index, &p->pixel_format, p->width, p->height, p->type);
758	switch (p->type) {
759	case V4L2_FRMIVAL_TYPE_DISCRETE:
760	pr_cont(", fps=%d/%d\n",
761	p->discrete.numerator,
762	p->discrete.denominator);
763	break;
764	case V4L2_FRMIVAL_TYPE_STEPWISE:
765	pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
766	p->stepwise.min.numerator,
767	p->stepwise.min.denominator,
768	p->stepwise.max.numerator,
769	p->stepwise.max.denominator,
770	p->stepwise.step.numerator,
771	p->stepwise.step.denominator);
772	break;
773	case V4L2_FRMIVAL_TYPE_CONTINUOUS:
774	default:
775	pr_cont("\n");
776	break;
777	}
778	}
779
780	static void v4l_print_event(const void *arg, bool write_only)
781	{
782	const struct v4l2_event *p = arg;
783	const struct v4l2_event_ctrl *c;
784
785	pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
786	p->type, p->pending, p->sequence, p->id,
787	p->timestamp.tv_sec, p->timestamp.tv_nsec);
788	switch (p->type) {
789	case V4L2_EVENT_VSYNC:
790	printk(KERN_DEBUG "field=%s\n",
791	prt_names(p->u.vsync.field, v4l2_field_names));
792	break;
793	case V4L2_EVENT_CTRL:
794	c = &p->u.ctrl;
795	printk(KERN_DEBUG "changes=0x%x, type=%u, ",
796	c->changes, c->type);
797	if (c->type == V4L2_CTRL_TYPE_INTEGER64)
798	pr_cont("value64=%lld, ", c->value64);
799	else
800	pr_cont("value=%d, ", c->value);
801	pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
802	c->flags, c->minimum, c->maximum,
803	c->step, c->default_value);
804	break;
805	case V4L2_EVENT_FRAME_SYNC:
806	pr_cont("frame_sequence=%u\n",
807	p->u.frame_sync.frame_sequence);
808	break;
809	}
810	}
811
812	static void v4l_print_event_subscription(const void *arg, bool write_only)
813	{
814	const struct v4l2_event_subscription *p = arg;
815
816	pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
817	p->type, p->id, p->flags);
818	}
819
820	static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
821	{
822	const struct v4l2_sliced_vbi_cap *p = arg;
823	int i;
824
825	pr_cont("type=%s, service_set=0x%08x\n",
826	prt_names(p->type, v4l2_type_names), p->service_set);
827	for (i = 0; i < 24; i++)
828	printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
829	p->service_lines[0][i],
830	p->service_lines[1][i]);
831	}
832
833	static void v4l_print_freq_band(const void *arg, bool write_only)
834	{
835	const struct v4l2_frequency_band *p = arg;
836
837	pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
838	p->tuner, p->type, p->index,
839	p->capability, p->rangelow,
840	p->rangehigh, p->modulation);
841	}
842
843	static void v4l_print_edid(const void *arg, bool write_only)
844	{
845	const struct v4l2_edid *p = arg;
846
847	pr_cont("pad=%u, start_block=%u, blocks=%u\n",
848	p->pad, p->start_block, p->blocks);
849	}
850
851	static void v4l_print_u32(const void *arg, bool write_only)
852	{
853	pr_cont("value=%u\n", *(const u32 *)arg);
854	}
855
856	static void v4l_print_newline(const void *arg, bool write_only)
857	{
858	pr_cont("\n");
859	}
860
861	static void v4l_print_default(const void *arg, bool write_only)
862	{
863	pr_cont("driver-specific ioctl\n");
864	}
865
866	static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
867	{
868	__u32 i;
869
870	/* zero the reserved fields */
871	c->reserved[0] = 0;
872	for (i = 0; i < c->count; i++)
873	c->controls[i].reserved2[0] = 0;
874
875	switch (c->which) {
876	case V4L2_CID_PRIVATE_BASE:
877	/*
878	* V4L2_CID_PRIVATE_BASE cannot be used as control class
879	* when using extended controls.
880	* Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
881	* is it allowed for backwards compatibility.
882	*/
883	if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
884	return false;
885	break;
886	case V4L2_CTRL_WHICH_DEF_VAL:
887	/* Default value cannot be changed */
888	if (ioctl == VIDIOC_S_EXT_CTRLS ||
889	ioctl == VIDIOC_TRY_EXT_CTRLS) {
890	c->error_idx = c->count;
891	return false;
892	}
893	return true;
894	case V4L2_CTRL_WHICH_CUR_VAL:
895	return true;
896	case V4L2_CTRL_WHICH_REQUEST_VAL:
897	c->error_idx = c->count;
898	return false;
899	}
900
901	/* Check that all controls are from the same control class. */
902	for (i = 0; i < c->count; i++) {
903	if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
904	c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
905	c->count;
906	return false;
907	}
908	}
909	return true;
910	}
911
912	static int check_fmt(struct file *file, enum v4l2_buf_type type)
913	{
914	const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
915	V4L2_CAP_VIDEO_CAPTURE_MPLANE |
916	V4L2_CAP_VIDEO_OUTPUT |
917	V4L2_CAP_VIDEO_OUTPUT_MPLANE |
918	V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
919	const u32 meta_caps = V4L2_CAP_META_CAPTURE |
920	V4L2_CAP_META_OUTPUT;
921	struct video_device *vfd = video_devdata(file);
922	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
923	bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
924	(vfd->device_caps & vid_caps);
925	bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
926	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
927	bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
928	bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
929	(vfd->device_caps & meta_caps);
930	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
931	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
932
933	if (ops == NULL)
934	return -EINVAL;
935
936	switch (type) {
937	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
938	if ((is_vid || is_tch) && is_rx &&
939	(ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
940	return 0;
941	break;
942	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
943	if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
944	return 0;
945	break;
946	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
947	if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
948	return 0;
949	break;
950	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
951	if (is_vid && is_tx &&
952	(ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
953	return 0;
954	break;
955	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
956	if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
957	return 0;
958	break;
959	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
960	if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
961	return 0;
962	break;
963	case V4L2_BUF_TYPE_VBI_CAPTURE:
964	if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
965	return 0;
966	break;
967	case V4L2_BUF_TYPE_VBI_OUTPUT:
968	if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
969	return 0;
970	break;
971	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
972	if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
973	return 0;
974	break;
975	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
976	if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
977	return 0;
978	break;
979	case V4L2_BUF_TYPE_SDR_CAPTURE:
980	if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
981	return 0;
982	break;
983	case V4L2_BUF_TYPE_SDR_OUTPUT:
984	if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
985	return 0;
986	break;
987	case V4L2_BUF_TYPE_META_CAPTURE:
988	if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
989	return 0;
990	break;
991	case V4L2_BUF_TYPE_META_OUTPUT:
992	if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
993	return 0;
994	break;
995	default:
996	break;
997	}
998	return -EINVAL;
999	}
1000
1001	static void v4l_sanitize_colorspace(u32 pixelformat, u32 *colorspace,
1002	u32 *encoding, u32 *quantization,
1003	u32 *xfer_func)
1004	{
1005	bool is_hsv = pixelformat == V4L2_PIX_FMT_HSV24 ||
1006	pixelformat == V4L2_PIX_FMT_HSV32;
1007
1008	if (!v4l2_is_colorspace_valid(colorspace: *colorspace)) {
1009	*colorspace = V4L2_COLORSPACE_DEFAULT;
1010	*encoding = V4L2_YCBCR_ENC_DEFAULT;
1011	*quantization = V4L2_QUANTIZATION_DEFAULT;
1012	*xfer_func = V4L2_XFER_FUNC_DEFAULT;
1013	}
1014
1015	if ((!is_hsv && !v4l2_is_ycbcr_enc_valid(ycbcr_enc: *encoding)) ||
1016	(is_hsv && !v4l2_is_hsv_enc_valid(hsv_enc: *encoding)))
1017	*encoding = V4L2_YCBCR_ENC_DEFAULT;
1018
1019	if (!v4l2_is_quant_valid(quantization: *quantization))
1020	*quantization = V4L2_QUANTIZATION_DEFAULT;
1021
1022	if (!v4l2_is_xfer_func_valid(xfer_func: *xfer_func))
1023	*xfer_func = V4L2_XFER_FUNC_DEFAULT;
1024	}
1025
1026	static void v4l_sanitize_format(struct v4l2_format *fmt)
1027	{
1028	unsigned int offset;
1029
1030	/* Make sure num_planes is not bogus */
1031	if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1032	fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1033	fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1034	VIDEO_MAX_PLANES);
1035
1036	/*
1037	* The v4l2_pix_format structure has been extended with fields that were
1038	* not previously required to be set to zero by applications. The priv
1039	* field, when set to a magic value, indicates that the extended fields
1040	* are valid. Otherwise they will contain undefined values. To simplify
1041	* the API towards drivers zero the extended fields and set the priv
1042	* field to the magic value when the extended pixel format structure
1043	* isn't used by applications.
1044	*/
1045	if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1046	fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1047	if (fmt->fmt.pix.priv != V4L2_PIX_FMT_PRIV_MAGIC) {
1048	fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1049
1050	offset = offsetof(struct v4l2_pix_format, priv)
1051	+ sizeof(fmt->fmt.pix.priv);
1052	memset(((void *)&fmt->fmt.pix) + offset, 0,
1053	sizeof(fmt->fmt.pix) - offset);
1054	}
1055	}
1056
1057	/* Replace invalid colorspace values with defaults. */
1058	if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1059	fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1060	v4l_sanitize_colorspace(pixelformat: fmt->fmt.pix.pixelformat,
1061	colorspace: &fmt->fmt.pix.colorspace,
1062	encoding: &fmt->fmt.pix.ycbcr_enc,
1063	quantization: &fmt->fmt.pix.quantization,
1064	xfer_func: &fmt->fmt.pix.xfer_func);
1065	} else if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1066	fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
1067	u32 ycbcr_enc = fmt->fmt.pix_mp.ycbcr_enc;
1068	u32 quantization = fmt->fmt.pix_mp.quantization;
1069	u32 xfer_func = fmt->fmt.pix_mp.xfer_func;
1070
1071	v4l_sanitize_colorspace(pixelformat: fmt->fmt.pix_mp.pixelformat,
1072	colorspace: &fmt->fmt.pix_mp.colorspace, encoding: &ycbcr_enc,
1073	quantization: &quantization, xfer_func: &xfer_func);
1074
1075	fmt->fmt.pix_mp.ycbcr_enc = ycbcr_enc;
1076	fmt->fmt.pix_mp.quantization = quantization;
1077	fmt->fmt.pix_mp.xfer_func = xfer_func;
1078	}
1079	}
1080
1081	static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1082	struct file *file, void *fh, void *arg)
1083	{
1084	struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1085	struct video_device *vfd = video_devdata(file);
1086	int ret;
1087
1088	cap->version = LINUX_VERSION_CODE;
1089	cap->device_caps = vfd->device_caps;
1090	cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1091
1092	media_set_bus_info(bus_info: cap->bus_info, bus_info_size: sizeof(cap->bus_info),
1093	dev: vfd->dev_parent);
1094
1095	ret = ops->vidioc_querycap(file, fh, cap);
1096
1097	/*
1098	* Drivers must not change device_caps, so check for this and
1099	* warn if this happened.
1100	*/
1101	WARN_ON(cap->device_caps != vfd->device_caps);
1102	/*
1103	* Check that capabilities is a superset of
1104	* vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1105	*/
1106	WARN_ON((cap->capabilities &
1107	(vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1108	(vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1109	cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1110	cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1111
1112	return ret;
1113	}
1114
1115	static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1116	struct file *file, void *fh, void *arg)
1117	{
1118	struct video_device *vfd = video_devdata(file);
1119
1120	if (vfd->device_caps & V4L2_CAP_IO_MC) {
1121	*(int *)arg = 0;
1122	return 0;
1123	}
1124
1125	return ops->vidioc_g_input(file, fh, arg);
1126	}
1127
1128	static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1129	struct file *file, void *fh, void *arg)
1130	{
1131	struct video_device *vfd = video_devdata(file);
1132
1133	if (vfd->device_caps & V4L2_CAP_IO_MC) {
1134	*(int *)arg = 0;
1135	return 0;
1136	}
1137
1138	return ops->vidioc_g_output(file, fh, arg);
1139	}
1140
1141	static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1142	struct file *file, void *fh, void *arg)
1143	{
1144	struct video_device *vfd = video_devdata(file);
1145	int ret;
1146
1147	ret = v4l_enable_media_source(vdev: vfd);
1148	if (ret)
1149	return ret;
1150
1151	if (vfd->device_caps & V4L2_CAP_IO_MC)
1152	return *(int *)arg ? -EINVAL : 0;
1153
1154	return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1155	}
1156
1157	static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1158	struct file *file, void *fh, void *arg)
1159	{
1160	struct video_device *vfd = video_devdata(file);
1161
1162	if (vfd->device_caps & V4L2_CAP_IO_MC)
1163	return *(int *)arg ? -EINVAL : 0;
1164
1165	return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1166	}
1167
1168	static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1169	struct file *file, void *fh, void *arg)
1170	{
1171	struct video_device *vfd;
1172	u32 *p = arg;
1173
1174	vfd = video_devdata(file);
1175	*p = v4l2_prio_max(global: vfd->prio);
1176	return 0;
1177	}
1178
1179	static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1180	struct file *file, void *fh, void *arg)
1181	{
1182	struct video_device *vfd;
1183	struct v4l2_fh *vfh;
1184	u32 *p = arg;
1185
1186	vfd = video_devdata(file);
1187	if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1188	return -ENOTTY;
1189	vfh = file->private_data;
1190	return v4l2_prio_change(global: vfd->prio, local: &vfh->prio, new: *p);
1191	}
1192
1193	static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1194	struct file *file, void *fh, void *arg)
1195	{
1196	struct video_device *vfd = video_devdata(file);
1197	struct v4l2_input *p = arg;
1198
1199	/*
1200	* We set the flags for CAP_DV_TIMINGS &
1201	* CAP_STD here based on ioctl handler provided by the
1202	* driver. If the driver doesn't support these
1203	* for a specific input, it must override these flags.
1204	*/
1205	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1206	p->capabilities |= V4L2_IN_CAP_STD;
1207
1208	if (vfd->device_caps & V4L2_CAP_IO_MC) {
1209	if (p->index)
1210	return -EINVAL;
1211	strscpy(p->name, vfd->name, sizeof(p->name));
1212	p->type = V4L2_INPUT_TYPE_CAMERA;
1213	return 0;
1214	}
1215
1216	return ops->vidioc_enum_input(file, fh, p);
1217	}
1218
1219	static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1220	struct file *file, void *fh, void *arg)
1221	{
1222	struct video_device *vfd = video_devdata(file);
1223	struct v4l2_output *p = arg;
1224
1225	/*
1226	* We set the flags for CAP_DV_TIMINGS &
1227	* CAP_STD here based on ioctl handler provided by the
1228	* driver. If the driver doesn't support these
1229	* for a specific output, it must override these flags.
1230	*/
1231	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1232	p->capabilities |= V4L2_OUT_CAP_STD;
1233
1234	if (vfd->device_caps & V4L2_CAP_IO_MC) {
1235	if (p->index)
1236	return -EINVAL;
1237	strscpy(p->name, vfd->name, sizeof(p->name));
1238	p->type = V4L2_OUTPUT_TYPE_ANALOG;
1239	return 0;
1240	}
1241
1242	return ops->vidioc_enum_output(file, fh, p);
1243	}
1244
1245	static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1246	{
1247	const unsigned sz = sizeof(fmt->description);
1248	const char *descr = NULL;
1249	u32 flags = 0;
1250
1251	/*
1252	* We depart from the normal coding style here since the descriptions
1253	* should be aligned so it is easy to see which descriptions will be
1254	* longer than 31 characters (the max length for a description).
1255	* And frankly, this is easier to read anyway.
1256	*
1257	* Note that gcc will use O(log N) comparisons to find the right case.
1258	*/
1259	switch (fmt->pixelformat) {
1260	/* Max description length mask: descr = "0123456789012345678901234567890" */
1261	case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break;
1262	case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break;
1263	case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break;
1264	case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break;
1265	case V4L2_PIX_FMT_RGBA444: descr = "16-bit RGBA 4-4-4-4"; break;
1266	case V4L2_PIX_FMT_RGBX444: descr = "16-bit RGBX 4-4-4-4"; break;
1267	case V4L2_PIX_FMT_ABGR444: descr = "16-bit ABGR 4-4-4-4"; break;
1268	case V4L2_PIX_FMT_XBGR444: descr = "16-bit XBGR 4-4-4-4"; break;
1269	case V4L2_PIX_FMT_BGRA444: descr = "16-bit BGRA 4-4-4-4"; break;
1270	case V4L2_PIX_FMT_BGRX444: descr = "16-bit BGRX 4-4-4-4"; break;
1271	case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break;
1272	case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break;
1273	case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break;
1274	case V4L2_PIX_FMT_ABGR555: descr = "16-bit ABGR 1-5-5-5"; break;
1275	case V4L2_PIX_FMT_XBGR555: descr = "16-bit XBGR 1-5-5-5"; break;
1276	case V4L2_PIX_FMT_RGBA555: descr = "16-bit RGBA 5-5-5-1"; break;
1277	case V4L2_PIX_FMT_RGBX555: descr = "16-bit RGBX 5-5-5-1"; break;
1278	case V4L2_PIX_FMT_BGRA555: descr = "16-bit BGRA 5-5-5-1"; break;
1279	case V4L2_PIX_FMT_BGRX555: descr = "16-bit BGRX 5-5-5-1"; break;
1280	case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break;
1281	case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1282	case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break;
1283	case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break;
1284	case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break;
1285	case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break;
1286	case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break;
1287	case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break;
1288	case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break;
1289	case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break;
1290	case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break;
1291	case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break;
1292	case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break;
1293	case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break;
1294	case V4L2_PIX_FMT_BGRA32: descr = "32-bit ABGR 8-8-8-8"; break;
1295	case V4L2_PIX_FMT_BGRX32: descr = "32-bit XBGR 8-8-8-8"; break;
1296	case V4L2_PIX_FMT_RGBA32: descr = "32-bit RGBA 8-8-8-8"; break;
1297	case V4L2_PIX_FMT_RGBX32: descr = "32-bit RGBX 8-8-8-8"; break;
1298	case V4L2_PIX_FMT_RGBX1010102: descr = "32-bit RGBX 10-10-10-2"; break;
1299	case V4L2_PIX_FMT_RGBA1010102: descr = "32-bit RGBA 10-10-10-2"; break;
1300	case V4L2_PIX_FMT_ARGB2101010: descr = "32-bit ARGB 2-10-10-10"; break;
1301	case V4L2_PIX_FMT_BGR48_12: descr = "12-bit Depth BGR"; break;
1302	case V4L2_PIX_FMT_ABGR64_12: descr = "12-bit Depth BGRA"; break;
1303	case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break;
1304	case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break;
1305	case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;
1306	case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break;
1307	case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break;
1308	case V4L2_PIX_FMT_Y012: descr = "12-bit Greyscale (bits 15-4)"; break;
1309	case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break;
1310	case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break;
1311	case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break;
1312	case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
1313	case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break;
1314	case V4L2_PIX_FMT_IPU3_Y10: descr = "10-bit greyscale (IPU3 Packed)"; break;
1315	case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break;
1316	case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break;
1317	case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break;
1318	case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break;
1319	case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break;
1320	case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break;
1321	case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break;
1322	case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break;
1323	case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break;
1324	case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break;
1325	case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break;
1326	case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break;
1327	case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break;
1328	case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break;
1329	case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break;
1330	case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break;
1331	case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break;
1332	case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break;
1333	case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break;
1334	case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break;
1335	case V4L2_PIX_FMT_YUV24: descr = "24-bit YUV 4:4:4 8-8-8"; break;
1336	case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break;
1337	case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break;
1338	case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break;
1339	case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break;
1340	case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break;
1341	case V4L2_PIX_FMT_YUVA32: descr = "32-bit YUVA 8-8-8-8"; break;
1342	case V4L2_PIX_FMT_YUVX32: descr = "32-bit YUVX 8-8-8-8"; break;
1343	case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break;
1344	case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break;
1345	case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break;
1346	case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break;
1347	case V4L2_PIX_FMT_YUV48_12: descr = "12-bit YUV 4:4:4 Packed"; break;
1348	case V4L2_PIX_FMT_NV12: descr = "Y/UV 4:2:0"; break;
1349	case V4L2_PIX_FMT_NV21: descr = "Y/VU 4:2:0"; break;
1350	case V4L2_PIX_FMT_NV16: descr = "Y/UV 4:2:2"; break;
1351	case V4L2_PIX_FMT_NV61: descr = "Y/VU 4:2:2"; break;
1352	case V4L2_PIX_FMT_NV24: descr = "Y/UV 4:4:4"; break;
1353	case V4L2_PIX_FMT_NV42: descr = "Y/VU 4:4:4"; break;
1354	case V4L2_PIX_FMT_P010: descr = "10-bit Y/UV 4:2:0"; break;
1355	case V4L2_PIX_FMT_P012: descr = "12-bit Y/UV 4:2:0"; break;
1356	case V4L2_PIX_FMT_NV12_4L4: descr = "Y/UV 4:2:0 (4x4 Linear)"; break;
1357	case V4L2_PIX_FMT_NV12_16L16: descr = "Y/UV 4:2:0 (16x16 Linear)"; break;
1358	case V4L2_PIX_FMT_NV12_32L32: descr = "Y/UV 4:2:0 (32x32 Linear)"; break;
1359	case V4L2_PIX_FMT_NV15_4L4: descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
1360	case V4L2_PIX_FMT_P010_4L4: descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
1361	case V4L2_PIX_FMT_NV12M: descr = "Y/UV 4:2:0 (N-C)"; break;
1362	case V4L2_PIX_FMT_NV21M: descr = "Y/VU 4:2:0 (N-C)"; break;
1363	case V4L2_PIX_FMT_NV16M: descr = "Y/UV 4:2:2 (N-C)"; break;
1364	case V4L2_PIX_FMT_NV61M: descr = "Y/VU 4:2:2 (N-C)"; break;
1365	case V4L2_PIX_FMT_NV12MT: descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break;
1366	case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break;
1367	case V4L2_PIX_FMT_P012M: descr = "12-bit Y/UV 4:2:0 (N-C)"; break;
1368	case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break;
1369	case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break;
1370	case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break;
1371	case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break;
1372	case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break;
1373	case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break;
1374	case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break;
1375	case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break;
1376	case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break;
1377	case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break;
1378	case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break;
1379	case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break;
1380	case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break;
1381	case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break;
1382	case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1383	case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1384	case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1385	case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1386	case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1387	case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1388	case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1389	case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1390	case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1391	case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1392	case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1393	case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1394	case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1395	case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1396	case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1397	case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1398	case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break;
1399	case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break;
1400	case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break;
1401	case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break;
1402	case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1403	case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1404	case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1405	case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1406	case V4L2_PIX_FMT_SBGGR14: descr = "14-bit Bayer BGBG/GRGR"; break;
1407	case V4L2_PIX_FMT_SGBRG14: descr = "14-bit Bayer GBGB/RGRG"; break;
1408	case V4L2_PIX_FMT_SGRBG14: descr = "14-bit Bayer GRGR/BGBG"; break;
1409	case V4L2_PIX_FMT_SRGGB14: descr = "14-bit Bayer RGRG/GBGB"; break;
1410	case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1411	case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1412	case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1413	case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1414	case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break;
1415	case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break;
1416	case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break;
1417	case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break;
1418	case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1419	case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break;
1420	case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break;
1421	case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break;
1422	case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break;
1423	case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break;
1424	case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break;
1425	case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break;
1426	case V4L2_PIX_FMT_MM21: descr = "Mediatek 8-bit Block Format"; break;
1427	case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break;
1428	case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break;
1429	case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break;
1430	case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break;
1431	case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break;
1432	case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break;
1433	case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break;
1434	case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break;
1435	case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break;
1436	case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break;
1437	case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit Signed Deltas"; break;
1438	case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit Signed Deltas"; break;
1439	case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break;
1440	case V4L2_TCH_FMT_TU08: descr = "8-bit Unsigned Touch Data"; break;
1441	case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break;
1442	case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break;
1443	case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break;
1444	case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break;
1445	case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break;
1446	case V4L2_META_FMT_RK_ISP1_PARAMS: descr = "Rockchip ISP1 3A Parameters"; break;
1447	case V4L2_META_FMT_RK_ISP1_STAT_3A: descr = "Rockchip ISP1 3A Statistics"; break;
1448	case V4L2_PIX_FMT_NV12_8L128: descr = "NV12 (8x128 Linear)"; break;
1449	case V4L2_PIX_FMT_NV12M_8L128: descr = "NV12M (8x128 Linear)"; break;
1450	case V4L2_PIX_FMT_NV12_10BE_8L128: descr = "10-bit NV12 (8x128 Linear, BE)"; break;
1451	case V4L2_PIX_FMT_NV12M_10BE_8L128: descr = "10-bit NV12M (8x128 Linear, BE)"; break;
1452	case V4L2_PIX_FMT_Y210: descr = "10-bit YUYV Packed"; break;
1453	case V4L2_PIX_FMT_Y212: descr = "12-bit YUYV Packed"; break;
1454	case V4L2_PIX_FMT_Y216: descr = "16-bit YUYV Packed"; break;
1455
1456	default:
1457	/* Compressed formats */
1458	flags = V4L2_FMT_FLAG_COMPRESSED;
1459	switch (fmt->pixelformat) {
1460	/* Max description length mask: descr = "0123456789012345678901234567890" */
1461	case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break;
1462	case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break;
1463	case V4L2_PIX_FMT_DV: descr = "1394"; break;
1464	case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break;
1465	case V4L2_PIX_FMT_H264: descr = "H.264"; break;
1466	case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break;
1467	case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break;
1468	case V4L2_PIX_FMT_H264_SLICE: descr = "H.264 Parsed Slice Data"; break;
1469	case V4L2_PIX_FMT_H263: descr = "H.263"; break;
1470	case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break;
1471	case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break;
1472	case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break;
1473	case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 Part 2 ES"; break;
1474	case V4L2_PIX_FMT_XVID: descr = "Xvid"; break;
1475	case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break;
1476	case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break;
1477	case V4L2_PIX_FMT_VP8: descr = "VP8"; break;
1478	case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break;
1479	case V4L2_PIX_FMT_VP9: descr = "VP9"; break;
1480	case V4L2_PIX_FMT_VP9_FRAME: descr = "VP9 Frame"; break;
1481	case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */
1482	case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break;
1483	case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */
1484	case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */
1485	case V4L2_PIX_FMT_SPK: descr = "Sorenson Spark"; break;
1486	case V4L2_PIX_FMT_RV30: descr = "RealVideo 8"; break;
1487	case V4L2_PIX_FMT_RV40: descr = "RealVideo 9 & 10"; break;
1488	case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break;
1489	case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break;
1490	case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break;
1491	case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break;
1492	case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break;
1493	case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break;
1494	case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break;
1495	case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break;
1496	case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break;
1497	case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break;
1498	case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break;
1499	case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break;
1500	case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break;
1501	case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break;
1502	case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break;
1503	case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break;
1504	case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break;
1505	case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1506	case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break;
1507	case V4L2_PIX_FMT_QC08C: descr = "QCOM Compressed 8-bit Format"; break;
1508	case V4L2_PIX_FMT_QC10C: descr = "QCOM Compressed 10-bit Format"; break;
1509	case V4L2_PIX_FMT_AJPG: descr = "Aspeed JPEG"; break;
1510	case V4L2_PIX_FMT_AV1_FRAME: descr = "AV1 Frame"; break;
1511	case V4L2_PIX_FMT_MT2110T: descr = "Mediatek 10bit Tile Mode"; break;
1512	case V4L2_PIX_FMT_MT2110R: descr = "Mediatek 10bit Raster Mode"; break;
1513	case V4L2_PIX_FMT_HEXTILE: descr = "Hextile Compressed Format"; break;
1514	default:
1515	if (fmt->description[0])
1516	return;
1517	WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1518	flags = 0;
1519	snprintf(buf: fmt->description, size: sz, fmt: "%p4cc",
1520	&fmt->pixelformat);
1521	break;
1522	}
1523	}
1524
1525	if (descr)
1526	WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1527	fmt->flags |= flags;
1528	}
1529
1530	static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1531	struct file *file, void *fh, void *arg)
1532	{
1533	struct video_device *vdev = video_devdata(file);
1534	struct v4l2_fmtdesc *p = arg;
1535	int ret = check_fmt(file, type: p->type);
1536	u32 mbus_code;
1537	u32 cap_mask;
1538
1539	if (ret)
1540	return ret;
1541	ret = -EINVAL;
1542
1543	if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1544	p->mbus_code = 0;
1545
1546	mbus_code = p->mbus_code;
1547	memset_after(p, 0, type);
1548	p->mbus_code = mbus_code;
1549
1550	switch (p->type) {
1551	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1552	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1553	cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1554	V4L2_CAP_VIDEO_M2M_MPLANE;
1555	if (!!(vdev->device_caps & cap_mask) !=
1556	(p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1557	break;
1558
1559	if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1560	break;
1561	ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1562	break;
1563	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1564	if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1565	break;
1566	ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1567	break;
1568	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1569	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1570	cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1571	V4L2_CAP_VIDEO_M2M_MPLANE;
1572	if (!!(vdev->device_caps & cap_mask) !=
1573	(p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1574	break;
1575
1576	if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1577	break;
1578	ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1579	break;
1580	case V4L2_BUF_TYPE_SDR_CAPTURE:
1581	if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1582	break;
1583	ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1584	break;
1585	case V4L2_BUF_TYPE_SDR_OUTPUT:
1586	if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1587	break;
1588	ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1589	break;
1590	case V4L2_BUF_TYPE_META_CAPTURE:
1591	if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1592	break;
1593	ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1594	break;
1595	case V4L2_BUF_TYPE_META_OUTPUT:
1596	if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1597	break;
1598	ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1599	break;
1600	}
1601	if (ret == 0)
1602	v4l_fill_fmtdesc(fmt: p);
1603	return ret;
1604	}
1605
1606	static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1607	{
1608	/*
1609	* The v4l2_pix_format structure contains fields that make no sense for
1610	* touch. Set them to default values in this case.
1611	*/
1612
1613	p->field = V4L2_FIELD_NONE;
1614	p->colorspace = V4L2_COLORSPACE_RAW;
1615	p->flags = 0;
1616	p->ycbcr_enc = 0;
1617	p->quantization = 0;
1618	p->xfer_func = 0;
1619	}
1620
1621	static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1622	struct file *file, void *fh, void *arg)
1623	{
1624	struct v4l2_format *p = arg;
1625	struct video_device *vfd = video_devdata(file);
1626	int ret = check_fmt(file, type: p->type);
1627
1628	if (ret)
1629	return ret;
1630
1631	memset(&p->fmt, 0, sizeof(p->fmt));
1632
1633	switch (p->type) {
1634	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1635	if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1636	break;
1637	p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1638	ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1639	/* just in case the driver zeroed it again */
1640	p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1641	if (vfd->vfl_type == VFL_TYPE_TOUCH)
1642	v4l_pix_format_touch(p: &p->fmt.pix);
1643	return ret;
1644	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1645	return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1646	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1647	return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1648	case V4L2_BUF_TYPE_VBI_CAPTURE:
1649	return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1650	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1651	return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1652	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1653	if (unlikely(!ops->vidioc_g_fmt_vid_out))
1654	break;
1655	p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1656	ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1657	/* just in case the driver zeroed it again */
1658	p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1659	return ret;
1660	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1661	return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1662	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1663	return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1664	case V4L2_BUF_TYPE_VBI_OUTPUT:
1665	return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1666	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1667	return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1668	case V4L2_BUF_TYPE_SDR_CAPTURE:
1669	return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1670	case V4L2_BUF_TYPE_SDR_OUTPUT:
1671	return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1672	case V4L2_BUF_TYPE_META_CAPTURE:
1673	return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1674	case V4L2_BUF_TYPE_META_OUTPUT:
1675	return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1676	}
1677	return -EINVAL;
1678	}
1679
1680	static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1681	struct file *file, void *fh, void *arg)
1682	{
1683	struct v4l2_format *p = arg;
1684	struct video_device *vfd = video_devdata(file);
1685	int ret = check_fmt(file, type: p->type);
1686	unsigned int i;
1687
1688	if (ret)
1689	return ret;
1690
1691	ret = v4l_enable_media_source(vdev: vfd);
1692	if (ret)
1693	return ret;
1694	v4l_sanitize_format(fmt: p);
1695
1696	switch (p->type) {
1697	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1698	if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1699	break;
1700	memset_after(p, 0, fmt.pix);
1701	ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1702	/* just in case the driver zeroed it again */
1703	p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1704	if (vfd->vfl_type == VFL_TYPE_TOUCH)
1705	v4l_pix_format_touch(p: &p->fmt.pix);
1706	return ret;
1707	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1708	if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1709	break;
1710	memset_after(p, 0, fmt.pix_mp.xfer_func);
1711	for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1712	memset_after(&p->fmt.pix_mp.plane_fmt[i],
1713	0, bytesperline);
1714	return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1715	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1716	if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1717	break;
1718	memset_after(p, 0, fmt.win);
1719	p->fmt.win.clips = NULL;
1720	p->fmt.win.clipcount = 0;
1721	p->fmt.win.bitmap = NULL;
1722	return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1723	case V4L2_BUF_TYPE_VBI_CAPTURE:
1724	if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1725	break;
1726	memset_after(p, 0, fmt.vbi.flags);
1727	return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1728	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1729	if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1730	break;
1731	memset_after(p, 0, fmt.sliced.io_size);
1732	return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1733	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1734	if (unlikely(!ops->vidioc_s_fmt_vid_out))
1735	break;
1736	memset_after(p, 0, fmt.pix);
1737	ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1738	/* just in case the driver zeroed it again */
1739	p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1740	return ret;
1741	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1742	if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1743	break;
1744	memset_after(p, 0, fmt.pix_mp.xfer_func);
1745	for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1746	memset_after(&p->fmt.pix_mp.plane_fmt[i],
1747	0, bytesperline);
1748	return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1749	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1750	if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1751	break;
1752	memset_after(p, 0, fmt.win);
1753	p->fmt.win.clips = NULL;
1754	p->fmt.win.clipcount = 0;
1755	p->fmt.win.bitmap = NULL;
1756	return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1757	case V4L2_BUF_TYPE_VBI_OUTPUT:
1758	if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1759	break;
1760	memset_after(p, 0, fmt.vbi.flags);
1761	return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1762	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1763	if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1764	break;
1765	memset_after(p, 0, fmt.sliced.io_size);
1766	return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1767	case V4L2_BUF_TYPE_SDR_CAPTURE:
1768	if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1769	break;
1770	memset_after(p, 0, fmt.sdr.buffersize);
1771	return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1772	case V4L2_BUF_TYPE_SDR_OUTPUT:
1773	if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1774	break;
1775	memset_after(p, 0, fmt.sdr.buffersize);
1776	return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1777	case V4L2_BUF_TYPE_META_CAPTURE:
1778	if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1779	break;
1780	memset_after(p, 0, fmt.meta);
1781	return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1782	case V4L2_BUF_TYPE_META_OUTPUT:
1783	if (unlikely(!ops->vidioc_s_fmt_meta_out))
1784	break;
1785	memset_after(p, 0, fmt.meta);
1786	return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1787	}
1788	return -EINVAL;
1789	}
1790
1791	static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1792	struct file *file, void *fh, void *arg)
1793	{
1794	struct v4l2_format *p = arg;
1795	struct video_device *vfd = video_devdata(file);
1796	int ret = check_fmt(file, type: p->type);
1797	unsigned int i;
1798
1799	if (ret)
1800	return ret;
1801
1802	v4l_sanitize_format(fmt: p);
1803
1804	switch (p->type) {
1805	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1806	if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1807	break;
1808	memset_after(p, 0, fmt.pix);
1809	ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1810	/* just in case the driver zeroed it again */
1811	p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1812	if (vfd->vfl_type == VFL_TYPE_TOUCH)
1813	v4l_pix_format_touch(p: &p->fmt.pix);
1814	return ret;
1815	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1816	if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1817	break;
1818	memset_after(p, 0, fmt.pix_mp.xfer_func);
1819	for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1820	memset_after(&p->fmt.pix_mp.plane_fmt[i],
1821	0, bytesperline);
1822	return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1823	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1824	if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1825	break;
1826	memset_after(p, 0, fmt.win);
1827	p->fmt.win.clips = NULL;
1828	p->fmt.win.clipcount = 0;
1829	p->fmt.win.bitmap = NULL;
1830	return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1831	case V4L2_BUF_TYPE_VBI_CAPTURE:
1832	if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1833	break;
1834	memset_after(p, 0, fmt.vbi.flags);
1835	return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1836	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1837	if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1838	break;
1839	memset_after(p, 0, fmt.sliced.io_size);
1840	return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1841	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1842	if (unlikely(!ops->vidioc_try_fmt_vid_out))
1843	break;
1844	memset_after(p, 0, fmt.pix);
1845	ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1846	/* just in case the driver zeroed it again */
1847	p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1848	return ret;
1849	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1850	if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1851	break;
1852	memset_after(p, 0, fmt.pix_mp.xfer_func);
1853	for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1854	memset_after(&p->fmt.pix_mp.plane_fmt[i],
1855	0, bytesperline);
1856	return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1857	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1858	if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1859	break;
1860	memset_after(p, 0, fmt.win);
1861	p->fmt.win.clips = NULL;
1862	p->fmt.win.clipcount = 0;
1863	p->fmt.win.bitmap = NULL;
1864	return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1865	case V4L2_BUF_TYPE_VBI_OUTPUT:
1866	if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1867	break;
1868	memset_after(p, 0, fmt.vbi.flags);
1869	return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1870	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1871	if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1872	break;
1873	memset_after(p, 0, fmt.sliced.io_size);
1874	return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1875	case V4L2_BUF_TYPE_SDR_CAPTURE:
1876	if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1877	break;
1878	memset_after(p, 0, fmt.sdr.buffersize);
1879	return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1880	case V4L2_BUF_TYPE_SDR_OUTPUT:
1881	if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1882	break;
1883	memset_after(p, 0, fmt.sdr.buffersize);
1884	return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1885	case V4L2_BUF_TYPE_META_CAPTURE:
1886	if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1887	break;
1888	memset_after(p, 0, fmt.meta);
1889	return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1890	case V4L2_BUF_TYPE_META_OUTPUT:
1891	if (unlikely(!ops->vidioc_try_fmt_meta_out))
1892	break;
1893	memset_after(p, 0, fmt.meta);
1894	return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1895	}
1896	return -EINVAL;
1897	}
1898
1899	static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1900	struct file *file, void *fh, void *arg)
1901	{
1902	return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1903	}
1904
1905	static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1906	struct file *file, void *fh, void *arg)
1907	{
1908	return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1909	}
1910
1911	static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1912	struct file *file, void *fh, void *arg)
1913	{
1914	struct video_device *vfd = video_devdata(file);
1915	struct v4l2_tuner *p = arg;
1916	int err;
1917
1918	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1919	V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1920	err = ops->vidioc_g_tuner(file, fh, p);
1921	if (!err)
1922	p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1923	return err;
1924	}
1925
1926	static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1927	struct file *file, void *fh, void *arg)
1928	{
1929	struct video_device *vfd = video_devdata(file);
1930	struct v4l2_tuner *p = arg;
1931	int ret;
1932
1933	ret = v4l_enable_media_source(vdev: vfd);
1934	if (ret)
1935	return ret;
1936	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1937	V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1938	return ops->vidioc_s_tuner(file, fh, p);
1939	}
1940
1941	static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1942	struct file *file, void *fh, void *arg)
1943	{
1944	struct video_device *vfd = video_devdata(file);
1945	struct v4l2_modulator *p = arg;
1946	int err;
1947
1948	if (vfd->vfl_type == VFL_TYPE_RADIO)
1949	p->type = V4L2_TUNER_RADIO;
1950
1951	err = ops->vidioc_g_modulator(file, fh, p);
1952	if (!err)
1953	p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1954	return err;
1955	}
1956
1957	static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1958	struct file *file, void *fh, void *arg)
1959	{
1960	struct video_device *vfd = video_devdata(file);
1961	struct v4l2_modulator *p = arg;
1962
1963	if (vfd->vfl_type == VFL_TYPE_RADIO)
1964	p->type = V4L2_TUNER_RADIO;
1965
1966	return ops->vidioc_s_modulator(file, fh, p);
1967	}
1968
1969	static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1970	struct file *file, void *fh, void *arg)
1971	{
1972	struct video_device *vfd = video_devdata(file);
1973	struct v4l2_frequency *p = arg;
1974
1975	if (vfd->vfl_type == VFL_TYPE_SDR)
1976	p->type = V4L2_TUNER_SDR;
1977	else
1978	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1979	V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1980	return ops->vidioc_g_frequency(file, fh, p);
1981	}
1982
1983	static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1984	struct file *file, void *fh, void *arg)
1985	{
1986	struct video_device *vfd = video_devdata(file);
1987	const struct v4l2_frequency *p = arg;
1988	enum v4l2_tuner_type type;
1989	int ret;
1990
1991	ret = v4l_enable_media_source(vdev: vfd);
1992	if (ret)
1993	return ret;
1994	if (vfd->vfl_type == VFL_TYPE_SDR) {
1995	if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1996	return -EINVAL;
1997	} else {
1998	type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1999	V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2000	if (type != p->type)
2001	return -EINVAL;
2002	}
2003	return ops->vidioc_s_frequency(file, fh, p);
2004	}
2005
2006	static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
2007	struct file *file, void *fh, void *arg)
2008	{
2009	struct video_device *vfd = video_devdata(file);
2010	struct v4l2_standard *p = arg;
2011
2012	return v4l_video_std_enumstd(vs: p, id: vfd->tvnorms);
2013	}
2014
2015	static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
2016	struct file *file, void *fh, void *arg)
2017	{
2018	struct video_device *vfd = video_devdata(file);
2019	v4l2_std_id id = *(v4l2_std_id *)arg, norm;
2020	int ret;
2021
2022	ret = v4l_enable_media_source(vdev: vfd);
2023	if (ret)
2024	return ret;
2025	norm = id & vfd->tvnorms;
2026	if (vfd->tvnorms && !norm) /* Check if std is supported */
2027	return -EINVAL;
2028
2029	/* Calls the specific handler */
2030	return ops->vidioc_s_std(file, fh, norm);
2031	}
2032
2033	static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
2034	struct file *file, void *fh, void *arg)
2035	{
2036	struct video_device *vfd = video_devdata(file);
2037	v4l2_std_id *p = arg;
2038	int ret;
2039
2040	ret = v4l_enable_media_source(vdev: vfd);
2041	if (ret)
2042	return ret;
2043	/*
2044	* If no signal is detected, then the driver should return
2045	* V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
2046	* any standards that do not apply removed.
2047	*
2048	* This means that tuners, audio and video decoders can join
2049	* their efforts to improve the standards detection.
2050	*/
2051	*p = vfd->tvnorms;
2052	return ops->vidioc_querystd(file, fh, arg);
2053	}
2054
2055	static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2056	struct file *file, void *fh, void *arg)
2057	{
2058	struct video_device *vfd = video_devdata(file);
2059	struct v4l2_hw_freq_seek *p = arg;
2060	enum v4l2_tuner_type type;
2061	int ret;
2062
2063	ret = v4l_enable_media_source(vdev: vfd);
2064	if (ret)
2065	return ret;
2066	/* s_hw_freq_seek is not supported for SDR for now */
2067	if (vfd->vfl_type == VFL_TYPE_SDR)
2068	return -EINVAL;
2069
2070	type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2071	V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2072	if (p->type != type)
2073	return -EINVAL;
2074	return ops->vidioc_s_hw_freq_seek(file, fh, p);
2075	}
2076
2077	static int v4l_s_fbuf(const struct v4l2_ioctl_ops *ops,
2078	struct file *file, void *fh, void *arg)
2079	{
2080	struct v4l2_framebuffer *p = arg;
2081
2082	p->base = NULL;
2083	return ops->vidioc_s_fbuf(file, fh, p);
2084	}
2085
2086	static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2087	struct file *file, void *fh, void *arg)
2088	{
2089	return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2090	}
2091
2092	static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2093	struct file *file, void *fh, void *arg)
2094	{
2095	struct v4l2_requestbuffers *p = arg;
2096	int ret = check_fmt(file, type: p->type);
2097
2098	if (ret)
2099	return ret;
2100
2101	memset_after(p, 0, flags);
2102
2103	return ops->vidioc_reqbufs(file, fh, p);
2104	}
2105
2106	static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2107	struct file *file, void *fh, void *arg)
2108	{
2109	struct v4l2_buffer *p = arg;
2110	int ret = check_fmt(file, type: p->type);
2111
2112	return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2113	}
2114
2115	static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2116	struct file *file, void *fh, void *arg)
2117	{
2118	struct v4l2_buffer *p = arg;
2119	int ret = check_fmt(file, type: p->type);
2120
2121	return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2122	}
2123
2124	static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2125	struct file *file, void *fh, void *arg)
2126	{
2127	struct v4l2_buffer *p = arg;
2128	int ret = check_fmt(file, type: p->type);
2129
2130	return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2131	}
2132
2133	static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2134	struct file *file, void *fh, void *arg)
2135	{
2136	struct v4l2_create_buffers *create = arg;
2137	int ret = check_fmt(file, type: create->format.type);
2138
2139	if (ret)
2140	return ret;
2141
2142	memset_after(create, 0, flags);
2143
2144	v4l_sanitize_format(fmt: &create->format);
2145
2146	ret = ops->vidioc_create_bufs(file, fh, create);
2147
2148	if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2149	create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2150	create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2151
2152	return ret;
2153	}
2154
2155	static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2156	struct file *file, void *fh, void *arg)
2157	{
2158	struct v4l2_buffer *b = arg;
2159	int ret = check_fmt(file, type: b->type);
2160
2161	return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2162	}
2163
2164	static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2165	struct file *file, void *fh, void *arg)
2166	{
2167	struct video_device *vfd = video_devdata(file);
2168	struct v4l2_streamparm *p = arg;
2169	v4l2_std_id std;
2170	int ret = check_fmt(file, type: p->type);
2171
2172	if (ret)
2173	return ret;
2174	if (ops->vidioc_g_parm)
2175	return ops->vidioc_g_parm(file, fh, p);
2176	if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2177	p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2178	return -EINVAL;
2179	if (vfd->device_caps & V4L2_CAP_READWRITE)
2180	p->parm.capture.readbuffers = 2;
2181	ret = ops->vidioc_g_std(file, fh, &std);
2182	if (ret == 0)
2183	v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2184	return ret;
2185	}
2186
2187	static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2188	struct file *file, void *fh, void *arg)
2189	{
2190	struct v4l2_streamparm *p = arg;
2191	int ret = check_fmt(file, type: p->type);
2192
2193	if (ret)
2194	return ret;
2195
2196	/* Note: extendedmode is never used in drivers */
2197	if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2198	memset(p->parm.output.reserved, 0,
2199	sizeof(p->parm.output.reserved));
2200	p->parm.output.extendedmode = 0;
2201	p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2202	} else {
2203	memset(p->parm.capture.reserved, 0,
2204	sizeof(p->parm.capture.reserved));
2205	p->parm.capture.extendedmode = 0;
2206	p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2207	}
2208	return ops->vidioc_s_parm(file, fh, p);
2209	}
2210
2211	static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2212	struct file *file, void *fh, void *arg)
2213	{
2214	struct video_device *vfd = video_devdata(file);
2215	struct v4l2_queryctrl *p = arg;
2216	struct v4l2_fh *vfh =
2217	test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2218
2219	if (vfh && vfh->ctrl_handler)
2220	return v4l2_queryctrl(hdl: vfh->ctrl_handler, qc: p);
2221	if (vfd->ctrl_handler)
2222	return v4l2_queryctrl(hdl: vfd->ctrl_handler, qc: p);
2223	if (ops->vidioc_queryctrl)
2224	return ops->vidioc_queryctrl(file, fh, p);
2225	return -ENOTTY;
2226	}
2227
2228	static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2229	struct file *file, void *fh, void *arg)
2230	{
2231	struct video_device *vfd = video_devdata(file);
2232	struct v4l2_query_ext_ctrl *p = arg;
2233	struct v4l2_fh *vfh =
2234	test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2235
2236	if (vfh && vfh->ctrl_handler)
2237	return v4l2_query_ext_ctrl(hdl: vfh->ctrl_handler, qc: p);
2238	if (vfd->ctrl_handler)
2239	return v4l2_query_ext_ctrl(hdl: vfd->ctrl_handler, qc: p);
2240	if (ops->vidioc_query_ext_ctrl)
2241	return ops->vidioc_query_ext_ctrl(file, fh, p);
2242	return -ENOTTY;
2243	}
2244
2245	static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2246	struct file *file, void *fh, void *arg)
2247	{
2248	struct video_device *vfd = video_devdata(file);
2249	struct v4l2_querymenu *p = arg;
2250	struct v4l2_fh *vfh =
2251	test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2252
2253	if (vfh && vfh->ctrl_handler)
2254	return v4l2_querymenu(hdl: vfh->ctrl_handler, qm: p);
2255	if (vfd->ctrl_handler)
2256	return v4l2_querymenu(hdl: vfd->ctrl_handler, qm: p);
2257	if (ops->vidioc_querymenu)
2258	return ops->vidioc_querymenu(file, fh, p);
2259	return -ENOTTY;
2260	}
2261
2262	static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2263	struct file *file, void *fh, void *arg)
2264	{
2265	struct video_device *vfd = video_devdata(file);
2266	struct v4l2_control *p = arg;
2267	struct v4l2_fh *vfh =
2268	test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2269	struct v4l2_ext_controls ctrls;
2270	struct v4l2_ext_control ctrl;
2271
2272	if (vfh && vfh->ctrl_handler)
2273	return v4l2_g_ctrl(hdl: vfh->ctrl_handler, ctrl: p);
2274	if (vfd->ctrl_handler)
2275	return v4l2_g_ctrl(hdl: vfd->ctrl_handler, ctrl: p);
2276	if (ops->vidioc_g_ctrl)
2277	return ops->vidioc_g_ctrl(file, fh, p);
2278	if (ops->vidioc_g_ext_ctrls == NULL)
2279	return -ENOTTY;
2280
2281	ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2282	ctrls.count = 1;
2283	ctrls.controls = &ctrl;
2284	ctrl.id = p->id;
2285	ctrl.value = p->value;
2286	if (check_ext_ctrls(c: &ctrls, VIDIOC_G_CTRL)) {
2287	int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2288
2289	if (ret == 0)
2290	p->value = ctrl.value;
2291	return ret;
2292	}
2293	return -EINVAL;
2294	}
2295
2296	static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2297	struct file *file, void *fh, void *arg)
2298	{
2299	struct video_device *vfd = video_devdata(file);
2300	struct v4l2_control *p = arg;
2301	struct v4l2_fh *vfh =
2302	test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2303	struct v4l2_ext_controls ctrls;
2304	struct v4l2_ext_control ctrl;
2305	int ret;
2306
2307	if (vfh && vfh->ctrl_handler)
2308	return v4l2_s_ctrl(fh: vfh, hdl: vfh->ctrl_handler, ctrl: p);
2309	if (vfd->ctrl_handler)
2310	return v4l2_s_ctrl(NULL, hdl: vfd->ctrl_handler, ctrl: p);
2311	if (ops->vidioc_s_ctrl)
2312	return ops->vidioc_s_ctrl(file, fh, p);
2313	if (ops->vidioc_s_ext_ctrls == NULL)
2314	return -ENOTTY;
2315
2316	ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2317	ctrls.count = 1;
2318	ctrls.controls = &ctrl;
2319	ctrl.id = p->id;
2320	ctrl.value = p->value;
2321	if (!check_ext_ctrls(c: &ctrls, VIDIOC_S_CTRL))
2322	return -EINVAL;
2323	ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2324	p->value = ctrl.value;
2325	return ret;
2326	}
2327
2328	static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2329	struct file *file, void *fh, void *arg)
2330	{
2331	struct video_device *vfd = video_devdata(file);
2332	struct v4l2_ext_controls *p = arg;
2333	struct v4l2_fh *vfh =
2334	test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2335
2336	p->error_idx = p->count;
2337	if (vfh && vfh->ctrl_handler)
2338	return v4l2_g_ext_ctrls(hdl: vfh->ctrl_handler,
2339	vdev: vfd, mdev: vfd->v4l2_dev->mdev, c: p);
2340	if (vfd->ctrl_handler)
2341	return v4l2_g_ext_ctrls(hdl: vfd->ctrl_handler,
2342	vdev: vfd, mdev: vfd->v4l2_dev->mdev, c: p);
2343	if (ops->vidioc_g_ext_ctrls == NULL)
2344	return -ENOTTY;
2345	return check_ext_ctrls(c: p, VIDIOC_G_EXT_CTRLS) ?
2346	ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2347	}
2348
2349	static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2350	struct file *file, void *fh, void *arg)
2351	{
2352	struct video_device *vfd = video_devdata(file);
2353	struct v4l2_ext_controls *p = arg;
2354	struct v4l2_fh *vfh =
2355	test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2356
2357	p->error_idx = p->count;
2358	if (vfh && vfh->ctrl_handler)
2359	return v4l2_s_ext_ctrls(fh: vfh, hdl: vfh->ctrl_handler,
2360	vdev: vfd, mdev: vfd->v4l2_dev->mdev, c: p);
2361	if (vfd->ctrl_handler)
2362	return v4l2_s_ext_ctrls(NULL, hdl: vfd->ctrl_handler,
2363	vdev: vfd, mdev: vfd->v4l2_dev->mdev, c: p);
2364	if (ops->vidioc_s_ext_ctrls == NULL)
2365	return -ENOTTY;
2366	return check_ext_ctrls(c: p, VIDIOC_S_EXT_CTRLS) ?
2367	ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2368	}
2369
2370	static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2371	struct file *file, void *fh, void *arg)
2372	{
2373	struct video_device *vfd = video_devdata(file);
2374	struct v4l2_ext_controls *p = arg;
2375	struct v4l2_fh *vfh =
2376	test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2377
2378	p->error_idx = p->count;
2379	if (vfh && vfh->ctrl_handler)
2380	return v4l2_try_ext_ctrls(hdl: vfh->ctrl_handler,
2381	vdev: vfd, mdev: vfd->v4l2_dev->mdev, c: p);
2382	if (vfd->ctrl_handler)
2383	return v4l2_try_ext_ctrls(hdl: vfd->ctrl_handler,
2384	vdev: vfd, mdev: vfd->v4l2_dev->mdev, c: p);
2385	if (ops->vidioc_try_ext_ctrls == NULL)
2386	return -ENOTTY;
2387	return check_ext_ctrls(c: p, VIDIOC_TRY_EXT_CTRLS) ?
2388	ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2389	}
2390
2391	/*
2392	* The selection API specified originally that the _MPLANE buffer types
2393	* shouldn't be used. The reasons for this are lost in the mists of time
2394	* (or just really crappy memories). Regardless, this is really annoying
2395	* for userspace. So to keep things simple we map _MPLANE buffer types
2396	* to their 'regular' counterparts before calling the driver. And we
2397	* restore it afterwards. This way applications can use either buffer
2398	* type and drivers don't need to check for both.
2399	*/
2400	static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2401	struct file *file, void *fh, void *arg)
2402	{
2403	struct v4l2_selection *p = arg;
2404	u32 old_type = p->type;
2405	int ret;
2406
2407	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2408	p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2409	else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2410	p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2411	ret = ops->vidioc_g_selection(file, fh, p);
2412	p->type = old_type;
2413	return ret;
2414	}
2415
2416	static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2417	struct file *file, void *fh, void *arg)
2418	{
2419	struct v4l2_selection *p = arg;
2420	u32 old_type = p->type;
2421	int ret;
2422
2423	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2424	p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2425	else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2426	p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2427	ret = ops->vidioc_s_selection(file, fh, p);
2428	p->type = old_type;
2429	return ret;
2430	}
2431
2432	static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2433	struct file *file, void *fh, void *arg)
2434	{
2435	struct video_device *vfd = video_devdata(file);
2436	struct v4l2_crop *p = arg;
2437	struct v4l2_selection s = {
2438	.type = p->type,
2439	};
2440	int ret;
2441
2442	/* simulate capture crop using selection api */
2443
2444	/* crop means compose for output devices */
2445	if (V4L2_TYPE_IS_OUTPUT(p->type))
2446	s.target = V4L2_SEL_TGT_COMPOSE;
2447	else
2448	s.target = V4L2_SEL_TGT_CROP;
2449
2450	if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2451	s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2452	V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2453
2454	ret = v4l_g_selection(ops, file, fh, arg: &s);
2455
2456	/* copying results to old structure on success */
2457	if (!ret)
2458	p->c = s.r;
2459	return ret;
2460	}
2461
2462	static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2463	struct file *file, void *fh, void *arg)
2464	{
2465	struct video_device *vfd = video_devdata(file);
2466	struct v4l2_crop *p = arg;
2467	struct v4l2_selection s = {
2468	.type = p->type,
2469	.r = p->c,
2470	};
2471
2472	/* simulate capture crop using selection api */
2473
2474	/* crop means compose for output devices */
2475	if (V4L2_TYPE_IS_OUTPUT(p->type))
2476	s.target = V4L2_SEL_TGT_COMPOSE;
2477	else
2478	s.target = V4L2_SEL_TGT_CROP;
2479
2480	if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2481	s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2482	V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2483
2484	return v4l_s_selection(ops, file, fh, arg: &s);
2485	}
2486
2487	static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2488	struct file *file, void *fh, void *arg)
2489	{
2490	struct video_device *vfd = video_devdata(file);
2491	struct v4l2_cropcap *p = arg;
2492	struct v4l2_selection s = { .type = p->type };
2493	int ret = 0;
2494
2495	/* setting trivial pixelaspect */
2496	p->pixelaspect.numerator = 1;
2497	p->pixelaspect.denominator = 1;
2498
2499	if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2500	s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2501	else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2502	s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2503
2504	/*
2505	* The determine_valid_ioctls() call already should ensure
2506	* that this can never happen, but just in case...
2507	*/
2508	if (WARN_ON(!ops->vidioc_g_selection))
2509	return -ENOTTY;
2510
2511	if (ops->vidioc_g_pixelaspect)
2512	ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2513	&p->pixelaspect);
2514
2515	/*
2516	* Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2517	* square pixel aspect ratio in that case.
2518	*/
2519	if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2520	return ret;
2521
2522	/* Use g_selection() to fill in the bounds and defrect rectangles */
2523
2524	/* obtaining bounds */
2525	if (V4L2_TYPE_IS_OUTPUT(p->type))
2526	s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2527	else
2528	s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2529
2530	if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2531	s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2532	V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2533
2534	ret = v4l_g_selection(ops, file, fh, arg: &s);
2535	if (ret)
2536	return ret;
2537	p->bounds = s.r;
2538
2539	/* obtaining defrect */
2540	if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2541	s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2542	else
2543	s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2544
2545	ret = v4l_g_selection(ops, file, fh, arg: &s);
2546	if (ret)
2547	return ret;
2548	p->defrect = s.r;
2549
2550	return 0;
2551	}
2552
2553	static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2554	struct file *file, void *fh, void *arg)
2555	{
2556	struct video_device *vfd = video_devdata(file);
2557	int ret;
2558
2559	if (vfd->v4l2_dev)
2560	pr_info("%s: ================= START STATUS =================\n",
2561	vfd->v4l2_dev->name);
2562	ret = ops->vidioc_log_status(file, fh);
2563	if (vfd->v4l2_dev)
2564	pr_info("%s: ================== END STATUS ==================\n",
2565	vfd->v4l2_dev->name);
2566	return ret;
2567	}
2568
2569	static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2570	struct file *file, void *fh, void *arg)
2571	{
2572	#ifdef CONFIG_VIDEO_ADV_DEBUG
2573	struct v4l2_dbg_register *p = arg;
2574	struct video_device *vfd = video_devdata(file);
2575	struct v4l2_subdev *sd;
2576	int idx = 0;
2577
2578	if (!capable(CAP_SYS_ADMIN))
2579	return -EPERM;
2580	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2581	if (vfd->v4l2_dev == NULL)
2582	return -EINVAL;
2583	v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2584	if (p->match.addr == idx++)
2585	return v4l2_subdev_call(sd, core, g_register, p);
2586	return -EINVAL;
2587	}
2588	if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2589	(ops->vidioc_g_chip_info || p->match.addr == 0))
2590	return ops->vidioc_g_register(file, fh, p);
2591	return -EINVAL;
2592	#else
2593	return -ENOTTY;
2594	#endif
2595	}
2596
2597	static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2598	struct file *file, void *fh, void *arg)
2599	{
2600	#ifdef CONFIG_VIDEO_ADV_DEBUG
2601	const struct v4l2_dbg_register *p = arg;
2602	struct video_device *vfd = video_devdata(file);
2603	struct v4l2_subdev *sd;
2604	int idx = 0;
2605
2606	if (!capable(CAP_SYS_ADMIN))
2607	return -EPERM;
2608	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2609	if (vfd->v4l2_dev == NULL)
2610	return -EINVAL;
2611	v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2612	if (p->match.addr == idx++)
2613	return v4l2_subdev_call(sd, core, s_register, p);
2614	return -EINVAL;
2615	}
2616	if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2617	(ops->vidioc_g_chip_info || p->match.addr == 0))
2618	return ops->vidioc_s_register(file, fh, p);
2619	return -EINVAL;
2620	#else
2621	return -ENOTTY;
2622	#endif
2623	}
2624
2625	static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2626	struct file *file, void *fh, void *arg)
2627	{
2628	#ifdef CONFIG_VIDEO_ADV_DEBUG
2629	struct video_device *vfd = video_devdata(file);
2630	struct v4l2_dbg_chip_info *p = arg;
2631	struct v4l2_subdev *sd;
2632	int idx = 0;
2633
2634	switch (p->match.type) {
2635	case V4L2_CHIP_MATCH_BRIDGE:
2636	if (ops->vidioc_s_register)
2637	p->flags |= V4L2_CHIP_FL_WRITABLE;
2638	if (ops->vidioc_g_register)
2639	p->flags |= V4L2_CHIP_FL_READABLE;
2640	strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2641	if (ops->vidioc_g_chip_info)
2642	return ops->vidioc_g_chip_info(file, fh, arg);
2643	if (p->match.addr)
2644	return -EINVAL;
2645	return 0;
2646
2647	case V4L2_CHIP_MATCH_SUBDEV:
2648	if (vfd->v4l2_dev == NULL)
2649	break;
2650	v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2651	if (p->match.addr != idx++)
2652	continue;
2653	if (sd->ops->core && sd->ops->core->s_register)
2654	p->flags |= V4L2_CHIP_FL_WRITABLE;
2655	if (sd->ops->core && sd->ops->core->g_register)
2656	p->flags |= V4L2_CHIP_FL_READABLE;
2657	strscpy(p->name, sd->name, sizeof(p->name));
2658	return 0;
2659	}
2660	break;
2661	}
2662	return -EINVAL;
2663	#else
2664	return -ENOTTY;
2665	#endif
2666	}
2667
2668	static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2669	struct file *file, void *fh, void *arg)
2670	{
2671	return v4l2_event_dequeue(fh, event: arg, nonblocking: file->f_flags & O_NONBLOCK);
2672	}
2673
2674	static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2675	struct file *file, void *fh, void *arg)
2676	{
2677	return ops->vidioc_subscribe_event(fh, arg);
2678	}
2679
2680	static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2681	struct file *file, void *fh, void *arg)
2682	{
2683	return ops->vidioc_unsubscribe_event(fh, arg);
2684	}
2685
2686	static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2687	struct file *file, void *fh, void *arg)
2688	{
2689	struct v4l2_sliced_vbi_cap *p = arg;
2690	int ret = check_fmt(file, type: p->type);
2691
2692	if (ret)
2693	return ret;
2694
2695	/* Clear up to type, everything after type is zeroed already */
2696	memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2697
2698	return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2699	}
2700
2701	static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2702	struct file *file, void *fh, void *arg)
2703	{
2704	struct video_device *vfd = video_devdata(file);
2705	struct v4l2_frequency_band *p = arg;
2706	enum v4l2_tuner_type type;
2707	int err;
2708
2709	if (vfd->vfl_type == VFL_TYPE_SDR) {
2710	if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2711	return -EINVAL;
2712	type = p->type;
2713	} else {
2714	type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2715	V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2716	if (type != p->type)
2717	return -EINVAL;
2718	}
2719	if (ops->vidioc_enum_freq_bands) {
2720	err = ops->vidioc_enum_freq_bands(file, fh, p);
2721	if (err != -ENOTTY)
2722	return err;
2723	}
2724	if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2725	struct v4l2_tuner t = {
2726	.index = p->tuner,
2727	.type = type,
2728	};
2729
2730	if (p->index)
2731	return -EINVAL;
2732	err = ops->vidioc_g_tuner(file, fh, &t);
2733	if (err)
2734	return err;
2735	p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2736	p->rangelow = t.rangelow;
2737	p->rangehigh = t.rangehigh;
2738	p->modulation = (type == V4L2_TUNER_RADIO) ?
2739	V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2740	return 0;
2741	}
2742	if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2743	struct v4l2_modulator m = {
2744	.index = p->tuner,
2745	};
2746
2747	if (type != V4L2_TUNER_RADIO)
2748	return -EINVAL;
2749	if (p->index)
2750	return -EINVAL;
2751	err = ops->vidioc_g_modulator(file, fh, &m);
2752	if (err)
2753	return err;
2754	p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2755	p->rangelow = m.rangelow;
2756	p->rangehigh = m.rangehigh;
2757	p->modulation = (type == V4L2_TUNER_RADIO) ?
2758	V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2759	return 0;
2760	}
2761	return -ENOTTY;
2762	}
2763
2764	struct v4l2_ioctl_info {
2765	unsigned int ioctl;
2766	u32 flags;
2767	const char * const name;
2768	int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2769	void *fh, void *p);
2770	void (*debug)(const void *arg, bool write_only);
2771	};
2772
2773	/* This control needs a priority check */
2774	#define INFO_FL_PRIO (1 << 0)
2775	/* This control can be valid if the filehandle passes a control handler. */
2776	#define INFO_FL_CTRL (1 << 1)
2777	/* Queuing ioctl */
2778	#define INFO_FL_QUEUE (1 << 2)
2779	/* Always copy back result, even on error */
2780	#define INFO_FL_ALWAYS_COPY (1 << 3)
2781	/* Zero struct from after the field to the end */
2782	#define INFO_FL_CLEAR(v4l2_struct, field) \
2783	((offsetof(struct v4l2_struct, field) + \
2784	sizeof_field(struct v4l2_struct, field)) << 16)
2785	#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2786
2787	#define DEFINE_V4L_STUB_FUNC(_vidioc) \
2788	static int v4l_stub_ ## _vidioc( \
2789	const struct v4l2_ioctl_ops *ops, \
2790	struct file *file, void *fh, void *p) \
2791	{ \
2792	return ops->vidioc_ ## _vidioc(file, fh, p); \
2793	}
2794
2795	#define IOCTL_INFO(_ioctl, _func, _debug, _flags) \
2796	[_IOC_NR(_ioctl)] = { \
2797	.ioctl = _ioctl, \
2798	.flags = _flags, \
2799	.name = #_ioctl, \
2800	.func = _func, \
2801	.debug = _debug, \
2802	}
2803
2804	DEFINE_V4L_STUB_FUNC(g_fbuf)
2805	DEFINE_V4L_STUB_FUNC(expbuf)
2806	DEFINE_V4L_STUB_FUNC(g_std)
2807	DEFINE_V4L_STUB_FUNC(g_audio)
2808	DEFINE_V4L_STUB_FUNC(s_audio)
2809	DEFINE_V4L_STUB_FUNC(g_edid)
2810	DEFINE_V4L_STUB_FUNC(s_edid)
2811	DEFINE_V4L_STUB_FUNC(g_audout)
2812	DEFINE_V4L_STUB_FUNC(s_audout)
2813	DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2814	DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2815	DEFINE_V4L_STUB_FUNC(enumaudio)
2816	DEFINE_V4L_STUB_FUNC(enumaudout)
2817	DEFINE_V4L_STUB_FUNC(enum_framesizes)
2818	DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2819	DEFINE_V4L_STUB_FUNC(g_enc_index)
2820	DEFINE_V4L_STUB_FUNC(encoder_cmd)
2821	DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2822	DEFINE_V4L_STUB_FUNC(decoder_cmd)
2823	DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2824	DEFINE_V4L_STUB_FUNC(s_dv_timings)
2825	DEFINE_V4L_STUB_FUNC(g_dv_timings)
2826	DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2827	DEFINE_V4L_STUB_FUNC(query_dv_timings)
2828	DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2829
2830	static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2831	IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2832	IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2833	IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2834	IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2835	IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2836	IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2837	IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2838	IOCTL_INFO(VIDIOC_S_FBUF, v4l_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2839	IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2840	IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2841	IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2842	IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2843	IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2844	IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2845	IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2846	IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2847	IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2848	IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2849	IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2850	IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2851	IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2852	IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2853	IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2854	IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2855	IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2856	IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2857	IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2858	IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2859	IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2860	IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2861	IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2862	IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2863	IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2864	IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2865	IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2866	IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2867	IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2868	IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2869	IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2870	IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2871	IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2872	IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2873	IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2874	IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2875	IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2876	IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2877	IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2878	IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2879	IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2880	IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2881	IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2882	IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2883	IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2884	IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2885	IOCTL_INFO(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
2886	IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2887	IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2888	IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2889	IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2890	IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2891	IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2892	IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2893	IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2894	IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2895	IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2896	IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2897	IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2898	IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2899	IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2900	IOCTL_INFO(VIDIOC_S_DV_TIMINGS, v4l_stub_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)),
2901	IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2902	IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2903	IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2904	IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2905	IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2906	IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2907	IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2908	IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2909	IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2910	IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2911	IOCTL_INFO(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
2912	IOCTL_INFO(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
2913	};
2914	#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2915
2916	static bool v4l2_is_known_ioctl(unsigned int cmd)
2917	{
2918	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2919	return false;
2920	return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2921	}
2922
2923	static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2924	struct v4l2_fh *vfh, unsigned int cmd,
2925	void *arg)
2926	{
2927	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2928	return vdev->lock;
2929	if (vfh && vfh->m2m_ctx &&
2930	(v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2931	if (vfh->m2m_ctx->q_lock)
2932	return vfh->m2m_ctx->q_lock;
2933	}
2934	if (vdev->queue && vdev->queue->lock &&
2935	(v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2936	return vdev->queue->lock;
2937	return vdev->lock;
2938	}
2939
2940	/* Common ioctl debug function. This function can be used by
2941	external ioctl messages as well as internal V4L ioctl */
2942	void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2943	{
2944	const char *dir, *type;
2945
2946	if (prefix)
2947	printk(KERN_DEBUG "%s: ", prefix);
2948
2949	switch (_IOC_TYPE(cmd)) {
2950	case 'd':
2951	type = "v4l2_int";
2952	break;
2953	case 'V':
2954	if (!v4l2_is_known_ioctl(cmd)) {
2955	type = "v4l2";
2956	break;
2957	}
2958	pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2959	return;
2960	default:
2961	type = "unknown";
2962	break;
2963	}
2964
2965	switch (_IOC_DIR(cmd)) {
2966	case _IOC_NONE: dir = "--"; break;
2967	case _IOC_READ: dir = "r-"; break;
2968	case _IOC_WRITE: dir = "-w"; break;
2969	case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2970	default: dir = "*ERR*"; break;
2971	}
2972	pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2973	type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2974	}
2975	EXPORT_SYMBOL(v4l_printk_ioctl);
2976
2977	static long __video_do_ioctl(struct file *file,
2978	unsigned int cmd, void *arg)
2979	{
2980	struct video_device *vfd = video_devdata(file);
2981	struct mutex *req_queue_lock = NULL;
2982	struct mutex *lock; /* ioctl serialization mutex */
2983	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2984	bool write_only = false;
2985	struct v4l2_ioctl_info default_info;
2986	const struct v4l2_ioctl_info *info;
2987	void *fh = file->private_data;
2988	struct v4l2_fh *vfh = NULL;
2989	int dev_debug = vfd->dev_debug;
2990	long ret = -ENOTTY;
2991
2992	if (ops == NULL) {
2993	pr_warn("%s: has no ioctl_ops.\n",
2994	video_device_node_name(vfd));
2995	return ret;
2996	}
2997
2998	if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2999	vfh = file->private_data;
3000
3001	/*
3002	* We need to serialize streamon/off with queueing new requests.
3003	* These ioctls may trigger the cancellation of a streaming
3004	* operation, and that should not be mixed with queueing a new
3005	* request at the same time.
3006	*/
3007	if (v4l2_device_supports_requests(v4l2_dev: vfd->v4l2_dev) &&
3008	(cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
3009	req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
3010
3011	if (mutex_lock_interruptible(req_queue_lock))
3012	return -ERESTARTSYS;
3013	}
3014
3015	lock = v4l2_ioctl_get_lock(vdev: vfd, vfh, cmd, arg);
3016
3017	if (lock && mutex_lock_interruptible(lock)) {
3018	if (req_queue_lock)
3019	mutex_unlock(lock: req_queue_lock);
3020	return -ERESTARTSYS;
3021	}
3022
3023	if (!video_is_registered(vdev: vfd)) {
3024	ret = -ENODEV;
3025	goto unlock;
3026	}
3027
3028	if (v4l2_is_known_ioctl(cmd)) {
3029	info = &v4l2_ioctls[_IOC_NR(cmd)];
3030
3031	if (!is_valid_ioctl(vfd, cmd) &&
3032	!((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
3033	goto done;
3034
3035	if (vfh && (info->flags & INFO_FL_PRIO)) {
3036	ret = v4l2_prio_check(global: vfd->prio, local: vfh->prio);
3037	if (ret)
3038	goto done;
3039	}
3040	} else {
3041	default_info.ioctl = cmd;
3042	default_info.flags = 0;
3043	default_info.debug = v4l_print_default;
3044	info = &default_info;
3045	}
3046
3047	write_only = _IOC_DIR(cmd) == _IOC_WRITE;
3048	if (info != &default_info) {
3049	ret = info->func(ops, file, fh, arg);
3050	} else if (!ops->vidioc_default) {
3051	ret = -ENOTTY;
3052	} else {
3053	ret = ops->vidioc_default(file, fh,
3054	vfh ? v4l2_prio_check(global: vfd->prio, local: vfh->prio) >= 0 : 0,
3055	cmd, arg);
3056	}
3057
3058	done:
3059	if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
3060	if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3061	(cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3062	goto unlock;
3063
3064	v4l_printk_ioctl(video_device_node_name(vdev: vfd), cmd);
3065	if (ret < 0)
3066	pr_cont(": error %ld", ret);
3067	if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3068	pr_cont("\n");
3069	else if (_IOC_DIR(cmd) == _IOC_NONE)
3070	info->debug(arg, write_only);
3071	else {
3072	pr_cont(": ");
3073	info->debug(arg, write_only);
3074	}
3075	}
3076
3077	unlock:
3078	if (lock)
3079	mutex_unlock(lock);
3080	if (req_queue_lock)
3081	mutex_unlock(lock: req_queue_lock);
3082	return ret;
3083	}
3084
3085	static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3086	void __user **user_ptr, void ***kernel_ptr)
3087	{
3088	int ret = 0;
3089
3090	switch (cmd) {
3091	case VIDIOC_PREPARE_BUF:
3092	case VIDIOC_QUERYBUF:
3093	case VIDIOC_QBUF:
3094	case VIDIOC_DQBUF: {
3095	struct v4l2_buffer *buf = parg;
3096
3097	if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3098	if (buf->length > VIDEO_MAX_PLANES) {
3099	ret = -EINVAL;
3100	break;
3101	}
3102	*user_ptr = (void __user *)buf->m.planes;
3103	*kernel_ptr = (void **)&buf->m.planes;
3104	*array_size = sizeof(struct v4l2_plane) * buf->length;
3105	ret = 1;
3106	}
3107	break;
3108	}
3109
3110	case VIDIOC_G_EDID:
3111	case VIDIOC_S_EDID: {
3112	struct v4l2_edid *edid = parg;
3113
3114	if (edid->blocks) {
3115	if (edid->blocks > 256) {
3116	ret = -EINVAL;
3117	break;
3118	}
3119	*user_ptr = (void __user *)edid->edid;
3120	*kernel_ptr = (void **)&edid->edid;
3121	*array_size = edid->blocks * 128;
3122	ret = 1;
3123	}
3124	break;
3125	}
3126
3127	case VIDIOC_S_EXT_CTRLS:
3128	case VIDIOC_G_EXT_CTRLS:
3129	case VIDIOC_TRY_EXT_CTRLS: {
3130	struct v4l2_ext_controls *ctrls = parg;
3131
3132	if (ctrls->count != 0) {
3133	if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3134	ret = -EINVAL;
3135	break;
3136	}
3137	*user_ptr = (void __user *)ctrls->controls;
3138	*kernel_ptr = (void **)&ctrls->controls;
3139	*array_size = sizeof(struct v4l2_ext_control)
3140	* ctrls->count;
3141	ret = 1;
3142	}
3143	break;
3144	}
3145
3146	case VIDIOC_SUBDEV_G_ROUTING:
3147	case VIDIOC_SUBDEV_S_ROUTING: {
3148	struct v4l2_subdev_routing *routing = parg;
3149
3150	if (routing->num_routes > 256)
3151	return -E2BIG;
3152
3153	*user_ptr = u64_to_user_ptr(routing->routes);
3154	*kernel_ptr = (void **)&routing->routes;
3155	*array_size = sizeof(struct v4l2_subdev_route)
3156	* routing->num_routes;
3157	ret = 1;
3158	break;
3159	}
3160	}
3161
3162	return ret;
3163	}
3164
3165	static unsigned int video_translate_cmd(unsigned int cmd)
3166	{
3167	#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3168	switch (cmd) {
3169	case VIDIOC_DQEVENT_TIME32:
3170	return VIDIOC_DQEVENT;
3171	case VIDIOC_QUERYBUF_TIME32:
3172	return VIDIOC_QUERYBUF;
3173	case VIDIOC_QBUF_TIME32:
3174	return VIDIOC_QBUF;
3175	case VIDIOC_DQBUF_TIME32:
3176	return VIDIOC_DQBUF;
3177	case VIDIOC_PREPARE_BUF_TIME32:
3178	return VIDIOC_PREPARE_BUF;
3179	}
3180	#endif
3181	if (in_compat_syscall())
3182	return v4l2_compat_translate_cmd(cmd);
3183
3184	return cmd;
3185	}
3186
3187	static int video_get_user(void __user *arg, void *parg,
3188	unsigned int real_cmd, unsigned int cmd,
3189	bool *always_copy)
3190	{
3191	unsigned int n = _IOC_SIZE(real_cmd);
3192	int err = 0;
3193
3194	if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3195	/* read-only ioctl */
3196	memset(parg, 0, n);
3197	return 0;
3198	}
3199
3200	/*
3201	* In some cases, only a few fields are used as input,
3202	* i.e. when the app sets "index" and then the driver
3203	* fills in the rest of the structure for the thing
3204	* with that index. We only need to copy up the first
3205	* non-input field.
3206	*/
3207	if (v4l2_is_known_ioctl(cmd: real_cmd)) {
3208	u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3209
3210	if (flags & INFO_FL_CLEAR_MASK)
3211	n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3212	*always_copy = flags & INFO_FL_ALWAYS_COPY;
3213	}
3214
3215	if (cmd == real_cmd) {
3216	if (copy_from_user(to: parg, from: (void __user *)arg, n))
3217	err = -EFAULT;
3218	} else if (in_compat_syscall()) {
3219	memset(parg, 0, n);
3220	err = v4l2_compat_get_user(arg, parg, cmd);
3221	} else {
3222	memset(parg, 0, n);
3223	#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3224	switch (cmd) {
3225	case VIDIOC_QUERYBUF_TIME32:
3226	case VIDIOC_QBUF_TIME32:
3227	case VIDIOC_DQBUF_TIME32:
3228	case VIDIOC_PREPARE_BUF_TIME32: {
3229	struct v4l2_buffer_time32 vb32;
3230	struct v4l2_buffer *vb = parg;
3231
3232	if (copy_from_user(&vb32, arg, sizeof(vb32)))
3233	return -EFAULT;
3234
3235	*vb = (struct v4l2_buffer) {
3236	.index = vb32.index,
3237	.type = vb32.type,
3238	.bytesused = vb32.bytesused,
3239	.flags = vb32.flags,
3240	.field = vb32.field,
3241	.timestamp.tv_sec = vb32.timestamp.tv_sec,
3242	.timestamp.tv_usec = vb32.timestamp.tv_usec,
3243	.timecode = vb32.timecode,
3244	.sequence = vb32.sequence,
3245	.memory = vb32.memory,
3246	.m.userptr = vb32.m.userptr,
3247	.length = vb32.length,
3248	.request_fd = vb32.request_fd,
3249	};
3250	break;
3251	}
3252	}
3253	#endif
3254	}
3255
3256	/* zero out anything we don't copy from userspace */
3257	if (!err && n < _IOC_SIZE(real_cmd))
3258	memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3259	return err;
3260	}
3261
3262	static int video_put_user(void __user *arg, void *parg,
3263	unsigned int real_cmd, unsigned int cmd)
3264	{
3265	if (!(_IOC_DIR(cmd) & _IOC_READ))
3266	return 0;
3267
3268	if (cmd == real_cmd) {
3269	/* Copy results into user buffer */
3270	if (copy_to_user(to: arg, from: parg, _IOC_SIZE(cmd)))
3271	return -EFAULT;
3272	return 0;
3273	}
3274
3275	if (in_compat_syscall())
3276	return v4l2_compat_put_user(arg, parg, cmd);
3277
3278	#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3279	switch (cmd) {
3280	case VIDIOC_DQEVENT_TIME32: {
3281	struct v4l2_event *ev = parg;
3282	struct v4l2_event_time32 ev32;
3283
3284	memset(&ev32, 0, sizeof(ev32));
3285
3286	ev32.type = ev->type;
3287	ev32.pending = ev->pending;
3288	ev32.sequence = ev->sequence;
3289	ev32.timestamp.tv_sec = ev->timestamp.tv_sec;
3290	ev32.timestamp.tv_nsec = ev->timestamp.tv_nsec;
3291	ev32.id = ev->id;
3292
3293	memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3294	memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3295
3296	if (copy_to_user(arg, &ev32, sizeof(ev32)))
3297	return -EFAULT;
3298	break;
3299	}
3300	case VIDIOC_QUERYBUF_TIME32:
3301	case VIDIOC_QBUF_TIME32:
3302	case VIDIOC_DQBUF_TIME32:
3303	case VIDIOC_PREPARE_BUF_TIME32: {
3304	struct v4l2_buffer *vb = parg;
3305	struct v4l2_buffer_time32 vb32;
3306
3307	memset(&vb32, 0, sizeof(vb32));
3308
3309	vb32.index = vb->index;
3310	vb32.type = vb->type;
3311	vb32.bytesused = vb->bytesused;
3312	vb32.flags = vb->flags;
3313	vb32.field = vb->field;
3314	vb32.timestamp.tv_sec = vb->timestamp.tv_sec;
3315	vb32.timestamp.tv_usec = vb->timestamp.tv_usec;
3316	vb32.timecode = vb->timecode;
3317	vb32.sequence = vb->sequence;
3318	vb32.memory = vb->memory;
3319	vb32.m.userptr = vb->m.userptr;
3320	vb32.length = vb->length;
3321	vb32.request_fd = vb->request_fd;
3322
3323	if (copy_to_user(arg, &vb32, sizeof(vb32)))
3324	return -EFAULT;
3325	break;
3326	}
3327	}
3328	#endif
3329
3330	return 0;
3331	}
3332
3333	long
3334	video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3335	v4l2_kioctl func)
3336	{
3337	char sbuf[128];
3338	void *mbuf = NULL, *array_buf = NULL;
3339	void *parg = (void *)arg;
3340	long err = -EINVAL;
3341	bool has_array_args;
3342	bool always_copy = false;
3343	size_t array_size = 0;
3344	void __user *user_ptr = NULL;
3345	void **kernel_ptr = NULL;
3346	unsigned int cmd = video_translate_cmd(cmd: orig_cmd);
3347	const size_t ioc_size = _IOC_SIZE(cmd);
3348
3349	/* Copy arguments into temp kernel buffer */
3350	if (_IOC_DIR(cmd) != _IOC_NONE) {
3351	if (ioc_size <= sizeof(sbuf)) {
3352	parg = sbuf;
3353	} else {
3354	/* too big to allocate from stack */
3355	mbuf = kmalloc(size: ioc_size, GFP_KERNEL);
3356	if (NULL == mbuf)
3357	return -ENOMEM;
3358	parg = mbuf;
3359	}
3360
3361	err = video_get_user(arg: (void __user *)arg, parg, real_cmd: cmd,
3362	cmd: orig_cmd, always_copy: &always_copy);
3363	if (err)
3364	goto out;
3365	}
3366
3367	err = check_array_args(cmd, parg, array_size: &array_size, user_ptr: &user_ptr, kernel_ptr: &kernel_ptr);
3368	if (err < 0)
3369	goto out;
3370	has_array_args = err;
3371
3372	if (has_array_args) {
3373	array_buf = kvmalloc(size: array_size, GFP_KERNEL);
3374	err = -ENOMEM;
3375	if (array_buf == NULL)
3376	goto out;
3377	if (in_compat_syscall())
3378	err = v4l2_compat_get_array_args(file, mbuf: array_buf,
3379	user_ptr, array_size,
3380	cmd: orig_cmd, arg: parg);
3381	else
3382	err = copy_from_user(to: array_buf, from: user_ptr, n: array_size) ?
3383	-EFAULT : 0;
3384	if (err)
3385	goto out;
3386	*kernel_ptr = array_buf;
3387	}
3388
3389	/* Handles IOCTL */
3390	err = func(file, cmd, parg);
3391	if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3392	err = -ENOTTY;
3393	goto out;
3394	}
3395
3396	if (err == 0) {
3397	if (cmd == VIDIOC_DQBUF)
3398	trace_v4l2_dqbuf(minor: video_devdata(file)->minor, buf: parg);
3399	else if (cmd == VIDIOC_QBUF)
3400	trace_v4l2_qbuf(minor: video_devdata(file)->minor, buf: parg);
3401	}
3402
3403	/*
3404	* Some ioctls can return an error, but still have valid
3405	* results that must be returned.
3406	*
3407	* FIXME: subdev IOCTLS are partially handled here and partially in
3408	* v4l2-subdev.c and the 'always_copy' flag can only be set for IOCTLS
3409	* defined here as part of the 'v4l2_ioctls' array. As
3410	* VIDIOC_SUBDEV_G_ROUTING needs to return results to applications even
3411	* in case of failure, but it is not defined here as part of the
3412	* 'v4l2_ioctls' array, insert an ad-hoc check to address that.
3413	*/
3414	if (err < 0 && !always_copy && cmd != VIDIOC_SUBDEV_G_ROUTING)
3415	goto out;
3416
3417	if (has_array_args) {
3418	*kernel_ptr = (void __force *)user_ptr;
3419	if (in_compat_syscall()) {
3420	int put_err;
3421
3422	put_err = v4l2_compat_put_array_args(file, user_ptr,
3423	mbuf: array_buf,
3424	array_size,
3425	cmd: orig_cmd, arg: parg);
3426	if (put_err)
3427	err = put_err;
3428	} else if (copy_to_user(to: user_ptr, from: array_buf, n: array_size)) {
3429	err = -EFAULT;
3430	}
3431	}
3432
3433	if (video_put_user(arg: (void __user *)arg, parg, real_cmd: cmd, cmd: orig_cmd))
3434	err = -EFAULT;
3435	out:
3436	kvfree(addr: array_buf);
3437	kfree(objp: mbuf);
3438	return err;
3439	}
3440
3441	long video_ioctl2(struct file *file,
3442	unsigned int cmd, unsigned long arg)
3443	{
3444	return video_usercopy(file, orig_cmd: cmd, arg, func: __video_do_ioctl);
3445	}
3446	EXPORT_SYMBOL(video_ioctl2);
3447