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/videodev2.h>
20 
21 #include <media/media-device.h> /* for media_set_bus_info() */
22 #include <media/v4l2-common.h>
23 #include <media/v4l2-ioctl.h>
24 #include <media/v4l2-ctrls.h>
25 #include <media/v4l2-fh.h>
26 #include <media/v4l2-event.h>
27 #include <media/v4l2-device.h>
28 #include <media/videobuf2-v4l2.h>
29 #include <media/v4l2-mc.h>
30 #include <media/v4l2-mem2mem.h>
31 
32 #include <trace/events/v4l2.h>
33 
34 /* Zero out the end of the struct pointed to by p.  Everything after, but
35  * not including, the specified field is cleared. */
36 #define CLEAR_AFTER_FIELD(p, field) \
37 	memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
38 	0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
39 
40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
41 
42 struct std_descr {
43 	v4l2_std_id std;
44 	const char *descr;
45 };
46 
47 static const struct std_descr standards[] = {
48 	{ V4L2_STD_NTSC,	"NTSC"      },
49 	{ V4L2_STD_NTSC_M,	"NTSC-M"    },
50 	{ V4L2_STD_NTSC_M_JP,	"NTSC-M-JP" },
51 	{ V4L2_STD_NTSC_M_KR,	"NTSC-M-KR" },
52 	{ V4L2_STD_NTSC_443,	"NTSC-443"  },
53 	{ V4L2_STD_PAL,		"PAL"       },
54 	{ V4L2_STD_PAL_BG,	"PAL-BG"    },
55 	{ V4L2_STD_PAL_B,	"PAL-B"     },
56 	{ V4L2_STD_PAL_B1,	"PAL-B1"    },
57 	{ V4L2_STD_PAL_G,	"PAL-G"     },
58 	{ V4L2_STD_PAL_H,	"PAL-H"     },
59 	{ V4L2_STD_PAL_I,	"PAL-I"     },
60 	{ V4L2_STD_PAL_DK,	"PAL-DK"    },
61 	{ V4L2_STD_PAL_D,	"PAL-D"     },
62 	{ V4L2_STD_PAL_D1,	"PAL-D1"    },
63 	{ V4L2_STD_PAL_K,	"PAL-K"     },
64 	{ V4L2_STD_PAL_M,	"PAL-M"     },
65 	{ V4L2_STD_PAL_N,	"PAL-N"     },
66 	{ V4L2_STD_PAL_Nc,	"PAL-Nc"    },
67 	{ V4L2_STD_PAL_60,	"PAL-60"    },
68 	{ V4L2_STD_SECAM,	"SECAM"     },
69 	{ V4L2_STD_SECAM_B,	"SECAM-B"   },
70 	{ V4L2_STD_SECAM_G,	"SECAM-G"   },
71 	{ V4L2_STD_SECAM_H,	"SECAM-H"   },
72 	{ V4L2_STD_SECAM_DK,	"SECAM-DK"  },
73 	{ V4L2_STD_SECAM_D,	"SECAM-D"   },
74 	{ V4L2_STD_SECAM_K,	"SECAM-K"   },
75 	{ V4L2_STD_SECAM_K1,	"SECAM-K1"  },
76 	{ V4L2_STD_SECAM_L,	"SECAM-L"   },
77 	{ V4L2_STD_SECAM_LC,	"SECAM-Lc"  },
78 	{ 0,			"Unknown"   }
79 };
80 
81 /* video4linux standard ID conversion to standard name
82  */
83 const char *v4l2_norm_to_name(v4l2_std_id id)
84 {
85 	u32 myid = id;
86 	int i;
87 
88 	/* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
89 	   64 bit comparisons. So, on that architecture, with some gcc
90 	   variants, compilation fails. Currently, the max value is 30bit wide.
91 	 */
92 	BUG_ON(myid != id);
93 
94 	for (i = 0; standards[i].std; i++)
95 		if (myid == standards[i].std)
96 			break;
97 	return standards[i].descr;
98 }
99 EXPORT_SYMBOL(v4l2_norm_to_name);
100 
101 /* Returns frame period for the given standard */
102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
103 {
104 	if (id & V4L2_STD_525_60) {
105 		frameperiod->numerator = 1001;
106 		frameperiod->denominator = 30000;
107 	} else {
108 		frameperiod->numerator = 1;
109 		frameperiod->denominator = 25;
110 	}
111 }
112 EXPORT_SYMBOL(v4l2_video_std_frame_period);
113 
114 /* Fill in the fields of a v4l2_standard structure according to the
115    'id' and 'transmission' parameters.  Returns negative on error.  */
116 int v4l2_video_std_construct(struct v4l2_standard *vs,
117 			     int id, const char *name)
118 {
119 	vs->id = id;
120 	v4l2_video_std_frame_period(id, &vs->frameperiod);
121 	vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
122 	strscpy(vs->name, name, sizeof(vs->name));
123 	return 0;
124 }
125 EXPORT_SYMBOL(v4l2_video_std_construct);
126 
127 /* Fill in the fields of a v4l2_standard structure according to the
128  * 'id' and 'vs->index' parameters. Returns negative on error. */
129 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
130 {
131 	v4l2_std_id curr_id = 0;
132 	unsigned int index = vs->index, i, j = 0;
133 	const char *descr = "";
134 
135 	/* Return -ENODATA if the id for the current input
136 	   or output is 0, meaning that it doesn't support this API. */
137 	if (id == 0)
138 		return -ENODATA;
139 
140 	/* Return norm array in a canonical way */
141 	for (i = 0; i <= index && id; i++) {
142 		/* last std value in the standards array is 0, so this
143 		   while always ends there since (id & 0) == 0. */
144 		while ((id & standards[j].std) != standards[j].std)
145 			j++;
146 		curr_id = standards[j].std;
147 		descr = standards[j].descr;
148 		j++;
149 		if (curr_id == 0)
150 			break;
151 		if (curr_id != V4L2_STD_PAL &&
152 				curr_id != V4L2_STD_SECAM &&
153 				curr_id != V4L2_STD_NTSC)
154 			id &= ~curr_id;
155 	}
156 	if (i <= index)
157 		return -EINVAL;
158 
159 	v4l2_video_std_construct(vs, curr_id, descr);
160 	return 0;
161 }
162 
163 /* ----------------------------------------------------------------- */
164 /* some arrays for pretty-printing debug messages of enum types      */
165 
166 const char *v4l2_field_names[] = {
167 	[V4L2_FIELD_ANY]        = "any",
168 	[V4L2_FIELD_NONE]       = "none",
169 	[V4L2_FIELD_TOP]        = "top",
170 	[V4L2_FIELD_BOTTOM]     = "bottom",
171 	[V4L2_FIELD_INTERLACED] = "interlaced",
172 	[V4L2_FIELD_SEQ_TB]     = "seq-tb",
173 	[V4L2_FIELD_SEQ_BT]     = "seq-bt",
174 	[V4L2_FIELD_ALTERNATE]  = "alternate",
175 	[V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
176 	[V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
177 };
178 EXPORT_SYMBOL(v4l2_field_names);
179 
180 const char *v4l2_type_names[] = {
181 	[0]				   = "0",
182 	[V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
183 	[V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
184 	[V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
185 	[V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
186 	[V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
187 	[V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
188 	[V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
189 	[V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
190 	[V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
191 	[V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
192 	[V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
193 	[V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
194 	[V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
195 	[V4L2_BUF_TYPE_META_OUTPUT]	   = "meta-out",
196 };
197 EXPORT_SYMBOL(v4l2_type_names);
198 
199 static const char *v4l2_memory_names[] = {
200 	[V4L2_MEMORY_MMAP]    = "mmap",
201 	[V4L2_MEMORY_USERPTR] = "userptr",
202 	[V4L2_MEMORY_OVERLAY] = "overlay",
203 	[V4L2_MEMORY_DMABUF] = "dmabuf",
204 };
205 
206 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
207 
208 /* ------------------------------------------------------------------ */
209 /* debug help functions                                               */
210 
211 static void v4l_print_querycap(const void *arg, bool write_only)
212 {
213 	const struct v4l2_capability *p = arg;
214 
215 	pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
216 		(int)sizeof(p->driver), p->driver,
217 		(int)sizeof(p->card), p->card,
218 		(int)sizeof(p->bus_info), p->bus_info,
219 		p->version, p->capabilities, p->device_caps);
220 }
221 
222 static void v4l_print_enuminput(const void *arg, bool write_only)
223 {
224 	const struct v4l2_input *p = arg;
225 
226 	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
227 		p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
228 		p->tuner, (unsigned long long)p->std, p->status,
229 		p->capabilities);
230 }
231 
232 static void v4l_print_enumoutput(const void *arg, bool write_only)
233 {
234 	const struct v4l2_output *p = arg;
235 
236 	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
237 		p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
238 		p->modulator, (unsigned long long)p->std, p->capabilities);
239 }
240 
241 static void v4l_print_audio(const void *arg, bool write_only)
242 {
243 	const struct v4l2_audio *p = arg;
244 
245 	if (write_only)
246 		pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
247 	else
248 		pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
249 			p->index, (int)sizeof(p->name), p->name,
250 			p->capability, p->mode);
251 }
252 
253 static void v4l_print_audioout(const void *arg, bool write_only)
254 {
255 	const struct v4l2_audioout *p = arg;
256 
257 	if (write_only)
258 		pr_cont("index=%u\n", p->index);
259 	else
260 		pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
261 			p->index, (int)sizeof(p->name), p->name,
262 			p->capability, p->mode);
263 }
264 
265 static void v4l_print_fmtdesc(const void *arg, bool write_only)
266 {
267 	const struct v4l2_fmtdesc *p = arg;
268 
269 	pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
270 		p->index, prt_names(p->type, v4l2_type_names),
271 		p->flags, &p->pixelformat, p->mbus_code,
272 		(int)sizeof(p->description), p->description);
273 }
274 
275 static void v4l_print_format(const void *arg, bool write_only)
276 {
277 	const struct v4l2_format *p = arg;
278 	const struct v4l2_pix_format *pix;
279 	const struct v4l2_pix_format_mplane *mp;
280 	const struct v4l2_vbi_format *vbi;
281 	const struct v4l2_sliced_vbi_format *sliced;
282 	const struct v4l2_window *win;
283 	const struct v4l2_meta_format *meta;
284 	u32 pixelformat;
285 	u32 planes;
286 	unsigned i;
287 
288 	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
289 	switch (p->type) {
290 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
291 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
292 		pix = &p->fmt.pix;
293 		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",
294 			pix->width, pix->height, &pix->pixelformat,
295 			prt_names(pix->field, v4l2_field_names),
296 			pix->bytesperline, pix->sizeimage,
297 			pix->colorspace, pix->flags, pix->ycbcr_enc,
298 			pix->quantization, pix->xfer_func);
299 		break;
300 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
301 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
302 		mp = &p->fmt.pix_mp;
303 		pixelformat = mp->pixelformat;
304 		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",
305 			mp->width, mp->height, &pixelformat,
306 			prt_names(mp->field, v4l2_field_names),
307 			mp->colorspace, mp->num_planes, mp->flags,
308 			mp->ycbcr_enc, mp->quantization, mp->xfer_func);
309 		planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
310 		for (i = 0; i < planes; i++)
311 			printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
312 					mp->plane_fmt[i].bytesperline,
313 					mp->plane_fmt[i].sizeimage);
314 		break;
315 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
316 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
317 		win = &p->fmt.win;
318 		/* Note: we can't print the clip list here since the clips
319 		 * pointer is a userspace pointer, not a kernelspace
320 		 * pointer. */
321 		pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n",
322 			win->w.width, win->w.height, win->w.left, win->w.top,
323 			prt_names(win->field, v4l2_field_names),
324 			win->chromakey, win->clipcount, win->clips,
325 			win->bitmap, win->global_alpha);
326 		break;
327 	case V4L2_BUF_TYPE_VBI_CAPTURE:
328 	case V4L2_BUF_TYPE_VBI_OUTPUT:
329 		vbi = &p->fmt.vbi;
330 		pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
331 			vbi->sampling_rate, vbi->offset,
332 			vbi->samples_per_line, &vbi->sample_format,
333 			vbi->start[0], vbi->start[1],
334 			vbi->count[0], vbi->count[1]);
335 		break;
336 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
337 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
338 		sliced = &p->fmt.sliced;
339 		pr_cont(", service_set=0x%08x, io_size=%d\n",
340 				sliced->service_set, sliced->io_size);
341 		for (i = 0; i < 24; i++)
342 			printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
343 				sliced->service_lines[0][i],
344 				sliced->service_lines[1][i]);
345 		break;
346 	case V4L2_BUF_TYPE_SDR_CAPTURE:
347 	case V4L2_BUF_TYPE_SDR_OUTPUT:
348 		pixelformat = p->fmt.sdr.pixelformat;
349 		pr_cont(", pixelformat=%p4cc\n", &pixelformat);
350 		break;
351 	case V4L2_BUF_TYPE_META_CAPTURE:
352 	case V4L2_BUF_TYPE_META_OUTPUT:
353 		meta = &p->fmt.meta;
354 		pixelformat = meta->dataformat;
355 		pr_cont(", dataformat=%p4cc, buffersize=%u\n",
356 			&pixelformat, meta->buffersize);
357 		break;
358 	}
359 }
360 
361 static void v4l_print_framebuffer(const void *arg, bool write_only)
362 {
363 	const struct v4l2_framebuffer *p = arg;
364 
365 	pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
366 		p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
367 		&p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
368 		p->fmt.colorspace);
369 }
370 
371 static void v4l_print_buftype(const void *arg, bool write_only)
372 {
373 	pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
374 }
375 
376 static void v4l_print_modulator(const void *arg, bool write_only)
377 {
378 	const struct v4l2_modulator *p = arg;
379 
380 	if (write_only)
381 		pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
382 	else
383 		pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
384 			p->index, (int)sizeof(p->name), p->name, p->capability,
385 			p->rangelow, p->rangehigh, p->txsubchans);
386 }
387 
388 static void v4l_print_tuner(const void *arg, bool write_only)
389 {
390 	const struct v4l2_tuner *p = arg;
391 
392 	if (write_only)
393 		pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
394 	else
395 		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",
396 			p->index, (int)sizeof(p->name), p->name, p->type,
397 			p->capability, p->rangelow,
398 			p->rangehigh, p->signal, p->afc,
399 			p->rxsubchans, p->audmode);
400 }
401 
402 static void v4l_print_frequency(const void *arg, bool write_only)
403 {
404 	const struct v4l2_frequency *p = arg;
405 
406 	pr_cont("tuner=%u, type=%u, frequency=%u\n",
407 				p->tuner, p->type, p->frequency);
408 }
409 
410 static void v4l_print_standard(const void *arg, bool write_only)
411 {
412 	const struct v4l2_standard *p = arg;
413 
414 	pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
415 		p->index,
416 		(unsigned long long)p->id, (int)sizeof(p->name), p->name,
417 		p->frameperiod.numerator,
418 		p->frameperiod.denominator,
419 		p->framelines);
420 }
421 
422 static void v4l_print_std(const void *arg, bool write_only)
423 {
424 	pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
425 }
426 
427 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
428 {
429 	const struct v4l2_hw_freq_seek *p = arg;
430 
431 	pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
432 		p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
433 		p->rangelow, p->rangehigh);
434 }
435 
436 static void v4l_print_requestbuffers(const void *arg, bool write_only)
437 {
438 	const struct v4l2_requestbuffers *p = arg;
439 
440 	pr_cont("count=%d, type=%s, memory=%s\n",
441 		p->count,
442 		prt_names(p->type, v4l2_type_names),
443 		prt_names(p->memory, v4l2_memory_names));
444 }
445 
446 static void v4l_print_buffer(const void *arg, bool write_only)
447 {
448 	const struct v4l2_buffer *p = arg;
449 	const struct v4l2_timecode *tc = &p->timecode;
450 	const struct v4l2_plane *plane;
451 	int i;
452 
453 	pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
454 			(int)p->timestamp.tv_sec / 3600,
455 			((int)p->timestamp.tv_sec / 60) % 60,
456 			((int)p->timestamp.tv_sec % 60),
457 			(long)p->timestamp.tv_usec,
458 			p->index,
459 			prt_names(p->type, v4l2_type_names), p->request_fd,
460 			p->flags, prt_names(p->field, v4l2_field_names),
461 			p->sequence, prt_names(p->memory, v4l2_memory_names));
462 
463 	if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
464 		pr_cont("\n");
465 		for (i = 0; i < p->length; ++i) {
466 			plane = &p->m.planes[i];
467 			printk(KERN_DEBUG
468 				"plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
469 				i, plane->bytesused, plane->data_offset,
470 				plane->m.userptr, plane->length);
471 		}
472 	} else {
473 		pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
474 			p->bytesused, p->m.userptr, p->length);
475 	}
476 
477 	printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
478 			tc->hours, tc->minutes, tc->seconds,
479 			tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
480 }
481 
482 static void v4l_print_exportbuffer(const void *arg, bool write_only)
483 {
484 	const struct v4l2_exportbuffer *p = arg;
485 
486 	pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
487 		p->fd, prt_names(p->type, v4l2_type_names),
488 		p->index, p->plane, p->flags);
489 }
490 
491 static void v4l_print_create_buffers(const void *arg, bool write_only)
492 {
493 	const struct v4l2_create_buffers *p = arg;
494 
495 	pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ",
496 		p->index, p->count, prt_names(p->memory, v4l2_memory_names),
497 		p->capabilities);
498 	v4l_print_format(&p->format, write_only);
499 }
500 
501 static void v4l_print_streamparm(const void *arg, bool write_only)
502 {
503 	const struct v4l2_streamparm *p = arg;
504 
505 	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
506 
507 	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
508 	    p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
509 		const struct v4l2_captureparm *c = &p->parm.capture;
510 
511 		pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
512 			c->capability, c->capturemode,
513 			c->timeperframe.numerator, c->timeperframe.denominator,
514 			c->extendedmode, c->readbuffers);
515 	} else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
516 		   p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
517 		const struct v4l2_outputparm *c = &p->parm.output;
518 
519 		pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
520 			c->capability, c->outputmode,
521 			c->timeperframe.numerator, c->timeperframe.denominator,
522 			c->extendedmode, c->writebuffers);
523 	} else {
524 		pr_cont("\n");
525 	}
526 }
527 
528 static void v4l_print_queryctrl(const void *arg, bool write_only)
529 {
530 	const struct v4l2_queryctrl *p = arg;
531 
532 	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
533 			p->id, p->type, (int)sizeof(p->name), p->name,
534 			p->minimum, p->maximum,
535 			p->step, p->default_value, p->flags);
536 }
537 
538 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
539 {
540 	const struct v4l2_query_ext_ctrl *p = arg;
541 
542 	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",
543 			p->id, p->type, (int)sizeof(p->name), p->name,
544 			p->minimum, p->maximum,
545 			p->step, p->default_value, p->flags,
546 			p->elem_size, p->elems, p->nr_of_dims,
547 			p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
548 }
549 
550 static void v4l_print_querymenu(const void *arg, bool write_only)
551 {
552 	const struct v4l2_querymenu *p = arg;
553 
554 	pr_cont("id=0x%x, index=%d\n", p->id, p->index);
555 }
556 
557 static void v4l_print_control(const void *arg, bool write_only)
558 {
559 	const struct v4l2_control *p = arg;
560 	const char *name = v4l2_ctrl_get_name(p->id);
561 
562 	if (name)
563 		pr_cont("name=%s, ", name);
564 	pr_cont("id=0x%x, value=%d\n", p->id, p->value);
565 }
566 
567 static void v4l_print_ext_controls(const void *arg, bool write_only)
568 {
569 	const struct v4l2_ext_controls *p = arg;
570 	int i;
571 
572 	pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
573 			p->which, p->count, p->error_idx, p->request_fd);
574 	for (i = 0; i < p->count; i++) {
575 		unsigned int id = p->controls[i].id;
576 		const char *name = v4l2_ctrl_get_name(id);
577 
578 		if (name)
579 			pr_cont(", name=%s", name);
580 		if (!p->controls[i].size)
581 			pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
582 		else
583 			pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
584 	}
585 	pr_cont("\n");
586 }
587 
588 static void v4l_print_cropcap(const void *arg, bool write_only)
589 {
590 	const struct v4l2_cropcap *p = arg;
591 
592 	pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
593 		prt_names(p->type, v4l2_type_names),
594 		p->bounds.width, p->bounds.height,
595 		p->bounds.left, p->bounds.top,
596 		p->defrect.width, p->defrect.height,
597 		p->defrect.left, p->defrect.top,
598 		p->pixelaspect.numerator, p->pixelaspect.denominator);
599 }
600 
601 static void v4l_print_crop(const void *arg, bool write_only)
602 {
603 	const struct v4l2_crop *p = arg;
604 
605 	pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
606 		prt_names(p->type, v4l2_type_names),
607 		p->c.width, p->c.height,
608 		p->c.left, p->c.top);
609 }
610 
611 static void v4l_print_selection(const void *arg, bool write_only)
612 {
613 	const struct v4l2_selection *p = arg;
614 
615 	pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
616 		prt_names(p->type, v4l2_type_names),
617 		p->target, p->flags,
618 		p->r.width, p->r.height, p->r.left, p->r.top);
619 }
620 
621 static void v4l_print_jpegcompression(const void *arg, bool write_only)
622 {
623 	const struct v4l2_jpegcompression *p = arg;
624 
625 	pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
626 		p->quality, p->APPn, p->APP_len,
627 		p->COM_len, p->jpeg_markers);
628 }
629 
630 static void v4l_print_enc_idx(const void *arg, bool write_only)
631 {
632 	const struct v4l2_enc_idx *p = arg;
633 
634 	pr_cont("entries=%d, entries_cap=%d\n",
635 			p->entries, p->entries_cap);
636 }
637 
638 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
639 {
640 	const struct v4l2_encoder_cmd *p = arg;
641 
642 	pr_cont("cmd=%d, flags=0x%x\n",
643 			p->cmd, p->flags);
644 }
645 
646 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
647 {
648 	const struct v4l2_decoder_cmd *p = arg;
649 
650 	pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
651 
652 	if (p->cmd == V4L2_DEC_CMD_START)
653 		pr_info("speed=%d, format=%u\n",
654 				p->start.speed, p->start.format);
655 	else if (p->cmd == V4L2_DEC_CMD_STOP)
656 		pr_info("pts=%llu\n", p->stop.pts);
657 }
658 
659 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
660 {
661 	const struct v4l2_dbg_chip_info *p = arg;
662 
663 	pr_cont("type=%u, ", p->match.type);
664 	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
665 		pr_cont("name=%.*s, ",
666 				(int)sizeof(p->match.name), p->match.name);
667 	else
668 		pr_cont("addr=%u, ", p->match.addr);
669 	pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
670 }
671 
672 static void v4l_print_dbg_register(const void *arg, bool write_only)
673 {
674 	const struct v4l2_dbg_register *p = arg;
675 
676 	pr_cont("type=%u, ", p->match.type);
677 	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
678 		pr_cont("name=%.*s, ",
679 				(int)sizeof(p->match.name), p->match.name);
680 	else
681 		pr_cont("addr=%u, ", p->match.addr);
682 	pr_cont("reg=0x%llx, val=0x%llx\n",
683 			p->reg, p->val);
684 }
685 
686 static void v4l_print_dv_timings(const void *arg, bool write_only)
687 {
688 	const struct v4l2_dv_timings *p = arg;
689 
690 	switch (p->type) {
691 	case V4L2_DV_BT_656_1120:
692 		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",
693 				p->bt.interlaced, p->bt.pixelclock,
694 				p->bt.width, p->bt.height,
695 				p->bt.polarities, p->bt.hfrontporch,
696 				p->bt.hsync, p->bt.hbackporch,
697 				p->bt.vfrontporch, p->bt.vsync,
698 				p->bt.vbackporch, p->bt.il_vfrontporch,
699 				p->bt.il_vsync, p->bt.il_vbackporch,
700 				p->bt.standards, p->bt.flags);
701 		break;
702 	default:
703 		pr_cont("type=%d\n", p->type);
704 		break;
705 	}
706 }
707 
708 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
709 {
710 	const struct v4l2_enum_dv_timings *p = arg;
711 
712 	pr_cont("index=%u, ", p->index);
713 	v4l_print_dv_timings(&p->timings, write_only);
714 }
715 
716 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
717 {
718 	const struct v4l2_dv_timings_cap *p = arg;
719 
720 	switch (p->type) {
721 	case V4L2_DV_BT_656_1120:
722 		pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
723 			p->bt.min_width, p->bt.max_width,
724 			p->bt.min_height, p->bt.max_height,
725 			p->bt.min_pixelclock, p->bt.max_pixelclock,
726 			p->bt.standards, p->bt.capabilities);
727 		break;
728 	default:
729 		pr_cont("type=%u\n", p->type);
730 		break;
731 	}
732 }
733 
734 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
735 {
736 	const struct v4l2_frmsizeenum *p = arg;
737 
738 	pr_cont("index=%u, pixelformat=%p4cc, type=%u",
739 		p->index, &p->pixel_format, p->type);
740 	switch (p->type) {
741 	case V4L2_FRMSIZE_TYPE_DISCRETE:
742 		pr_cont(", wxh=%ux%u\n",
743 			p->discrete.width, p->discrete.height);
744 		break;
745 	case V4L2_FRMSIZE_TYPE_STEPWISE:
746 		pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
747 				p->stepwise.min_width,
748 				p->stepwise.min_height,
749 				p->stepwise.max_width,
750 				p->stepwise.max_height,
751 				p->stepwise.step_width,
752 				p->stepwise.step_height);
753 		break;
754 	case V4L2_FRMSIZE_TYPE_CONTINUOUS:
755 	default:
756 		pr_cont("\n");
757 		break;
758 	}
759 }
760 
761 static void v4l_print_frmivalenum(const void *arg, bool write_only)
762 {
763 	const struct v4l2_frmivalenum *p = arg;
764 
765 	pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
766 		p->index, &p->pixel_format, p->width, p->height, p->type);
767 	switch (p->type) {
768 	case V4L2_FRMIVAL_TYPE_DISCRETE:
769 		pr_cont(", fps=%d/%d\n",
770 				p->discrete.numerator,
771 				p->discrete.denominator);
772 		break;
773 	case V4L2_FRMIVAL_TYPE_STEPWISE:
774 		pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
775 				p->stepwise.min.numerator,
776 				p->stepwise.min.denominator,
777 				p->stepwise.max.numerator,
778 				p->stepwise.max.denominator,
779 				p->stepwise.step.numerator,
780 				p->stepwise.step.denominator);
781 		break;
782 	case V4L2_FRMIVAL_TYPE_CONTINUOUS:
783 	default:
784 		pr_cont("\n");
785 		break;
786 	}
787 }
788 
789 static void v4l_print_event(const void *arg, bool write_only)
790 {
791 	const struct v4l2_event *p = arg;
792 	const struct v4l2_event_ctrl *c;
793 
794 	pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
795 			p->type, p->pending, p->sequence, p->id,
796 			p->timestamp.tv_sec, p->timestamp.tv_nsec);
797 	switch (p->type) {
798 	case V4L2_EVENT_VSYNC:
799 		printk(KERN_DEBUG "field=%s\n",
800 			prt_names(p->u.vsync.field, v4l2_field_names));
801 		break;
802 	case V4L2_EVENT_CTRL:
803 		c = &p->u.ctrl;
804 		printk(KERN_DEBUG "changes=0x%x, type=%u, ",
805 			c->changes, c->type);
806 		if (c->type == V4L2_CTRL_TYPE_INTEGER64)
807 			pr_cont("value64=%lld, ", c->value64);
808 		else
809 			pr_cont("value=%d, ", c->value);
810 		pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
811 			c->flags, c->minimum, c->maximum,
812 			c->step, c->default_value);
813 		break;
814 	case V4L2_EVENT_FRAME_SYNC:
815 		pr_cont("frame_sequence=%u\n",
816 			p->u.frame_sync.frame_sequence);
817 		break;
818 	}
819 }
820 
821 static void v4l_print_event_subscription(const void *arg, bool write_only)
822 {
823 	const struct v4l2_event_subscription *p = arg;
824 
825 	pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
826 			p->type, p->id, p->flags);
827 }
828 
829 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
830 {
831 	const struct v4l2_sliced_vbi_cap *p = arg;
832 	int i;
833 
834 	pr_cont("type=%s, service_set=0x%08x\n",
835 			prt_names(p->type, v4l2_type_names), p->service_set);
836 	for (i = 0; i < 24; i++)
837 		printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
838 				p->service_lines[0][i],
839 				p->service_lines[1][i]);
840 }
841 
842 static void v4l_print_freq_band(const void *arg, bool write_only)
843 {
844 	const struct v4l2_frequency_band *p = arg;
845 
846 	pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
847 			p->tuner, p->type, p->index,
848 			p->capability, p->rangelow,
849 			p->rangehigh, p->modulation);
850 }
851 
852 static void v4l_print_edid(const void *arg, bool write_only)
853 {
854 	const struct v4l2_edid *p = arg;
855 
856 	pr_cont("pad=%u, start_block=%u, blocks=%u\n",
857 		p->pad, p->start_block, p->blocks);
858 }
859 
860 static void v4l_print_u32(const void *arg, bool write_only)
861 {
862 	pr_cont("value=%u\n", *(const u32 *)arg);
863 }
864 
865 static void v4l_print_newline(const void *arg, bool write_only)
866 {
867 	pr_cont("\n");
868 }
869 
870 static void v4l_print_default(const void *arg, bool write_only)
871 {
872 	pr_cont("driver-specific ioctl\n");
873 }
874 
875 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
876 {
877 	__u32 i;
878 
879 	/* zero the reserved fields */
880 	c->reserved[0] = 0;
881 	for (i = 0; i < c->count; i++)
882 		c->controls[i].reserved2[0] = 0;
883 
884 	switch (c->which) {
885 	case V4L2_CID_PRIVATE_BASE:
886 		/*
887 		 * V4L2_CID_PRIVATE_BASE cannot be used as control class
888 		 * when using extended controls.
889 		 * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
890 		 * is it allowed for backwards compatibility.
891 		 */
892 		if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
893 			return false;
894 		break;
895 	case V4L2_CTRL_WHICH_DEF_VAL:
896 		/* Default value cannot be changed */
897 		if (ioctl == VIDIOC_S_EXT_CTRLS ||
898 		    ioctl == VIDIOC_TRY_EXT_CTRLS) {
899 			c->error_idx = c->count;
900 			return false;
901 		}
902 		return true;
903 	case V4L2_CTRL_WHICH_CUR_VAL:
904 		return true;
905 	case V4L2_CTRL_WHICH_REQUEST_VAL:
906 		c->error_idx = c->count;
907 		return false;
908 	}
909 
910 	/* Check that all controls are from the same control class. */
911 	for (i = 0; i < c->count; i++) {
912 		if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
913 			c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
914 								      c->count;
915 			return false;
916 		}
917 	}
918 	return true;
919 }
920 
921 static int check_fmt(struct file *file, enum v4l2_buf_type type)
922 {
923 	const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
924 			     V4L2_CAP_VIDEO_CAPTURE_MPLANE |
925 			     V4L2_CAP_VIDEO_OUTPUT |
926 			     V4L2_CAP_VIDEO_OUTPUT_MPLANE |
927 			     V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
928 	const u32 meta_caps = V4L2_CAP_META_CAPTURE |
929 			      V4L2_CAP_META_OUTPUT;
930 	struct video_device *vfd = video_devdata(file);
931 	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
932 	bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
933 		      (vfd->device_caps & vid_caps);
934 	bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
935 	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
936 	bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
937 	bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
938 		       (vfd->device_caps & meta_caps);
939 	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
940 	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
941 
942 	if (ops == NULL)
943 		return -EINVAL;
944 
945 	switch (type) {
946 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
947 		if ((is_vid || is_tch) && is_rx &&
948 		    (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
949 			return 0;
950 		break;
951 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
952 		if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
953 			return 0;
954 		break;
955 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
956 		if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
957 			return 0;
958 		break;
959 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
960 		if (is_vid && is_tx &&
961 		    (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
962 			return 0;
963 		break;
964 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
965 		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
966 			return 0;
967 		break;
968 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
969 		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
970 			return 0;
971 		break;
972 	case V4L2_BUF_TYPE_VBI_CAPTURE:
973 		if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
974 			return 0;
975 		break;
976 	case V4L2_BUF_TYPE_VBI_OUTPUT:
977 		if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
978 			return 0;
979 		break;
980 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
981 		if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
982 			return 0;
983 		break;
984 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
985 		if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
986 			return 0;
987 		break;
988 	case V4L2_BUF_TYPE_SDR_CAPTURE:
989 		if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
990 			return 0;
991 		break;
992 	case V4L2_BUF_TYPE_SDR_OUTPUT:
993 		if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
994 			return 0;
995 		break;
996 	case V4L2_BUF_TYPE_META_CAPTURE:
997 		if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
998 			return 0;
999 		break;
1000 	case V4L2_BUF_TYPE_META_OUTPUT:
1001 		if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
1002 			return 0;
1003 		break;
1004 	default:
1005 		break;
1006 	}
1007 	return -EINVAL;
1008 }
1009 
1010 static void v4l_sanitize_format(struct v4l2_format *fmt)
1011 {
1012 	unsigned int offset;
1013 
1014 	/* Make sure num_planes is not bogus */
1015 	if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1016 	    fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1017 		fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1018 					       VIDEO_MAX_PLANES);
1019 
1020 	/*
1021 	 * The v4l2_pix_format structure has been extended with fields that were
1022 	 * not previously required to be set to zero by applications. The priv
1023 	 * field, when set to a magic value, indicates the the extended fields
1024 	 * are valid. Otherwise they will contain undefined values. To simplify
1025 	 * the API towards drivers zero the extended fields and set the priv
1026 	 * field to the magic value when the extended pixel format structure
1027 	 * isn't used by applications.
1028 	 */
1029 
1030 	if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1031 	    fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1032 		return;
1033 
1034 	if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1035 		return;
1036 
1037 	fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1038 
1039 	offset = offsetof(struct v4l2_pix_format, priv)
1040 	       + sizeof(fmt->fmt.pix.priv);
1041 	memset(((void *)&fmt->fmt.pix) + offset, 0,
1042 	       sizeof(fmt->fmt.pix) - offset);
1043 }
1044 
1045 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1046 				struct file *file, void *fh, void *arg)
1047 {
1048 	struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1049 	struct video_device *vfd = video_devdata(file);
1050 	int ret;
1051 
1052 	cap->version = LINUX_VERSION_CODE;
1053 	cap->device_caps = vfd->device_caps;
1054 	cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1055 
1056 	media_set_bus_info(cap->bus_info, sizeof(cap->bus_info),
1057 			   vfd->dev_parent);
1058 
1059 	ret = ops->vidioc_querycap(file, fh, cap);
1060 
1061 	/*
1062 	 * Drivers must not change device_caps, so check for this and
1063 	 * warn if this happened.
1064 	 */
1065 	WARN_ON(cap->device_caps != vfd->device_caps);
1066 	/*
1067 	 * Check that capabilities is a superset of
1068 	 * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1069 	 */
1070 	WARN_ON((cap->capabilities &
1071 		 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1072 		(vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1073 	cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1074 	cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1075 
1076 	return ret;
1077 }
1078 
1079 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1080 		       struct file *file, void *fh, void *arg)
1081 {
1082 	struct video_device *vfd = video_devdata(file);
1083 
1084 	if (vfd->device_caps & V4L2_CAP_IO_MC) {
1085 		*(int *)arg = 0;
1086 		return 0;
1087 	}
1088 
1089 	return ops->vidioc_g_input(file, fh, arg);
1090 }
1091 
1092 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1093 			struct file *file, void *fh, void *arg)
1094 {
1095 	struct video_device *vfd = video_devdata(file);
1096 
1097 	if (vfd->device_caps & V4L2_CAP_IO_MC) {
1098 		*(int *)arg = 0;
1099 		return 0;
1100 	}
1101 
1102 	return ops->vidioc_g_output(file, fh, arg);
1103 }
1104 
1105 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1106 				struct file *file, void *fh, void *arg)
1107 {
1108 	struct video_device *vfd = video_devdata(file);
1109 	int ret;
1110 
1111 	ret = v4l_enable_media_source(vfd);
1112 	if (ret)
1113 		return ret;
1114 
1115 	if (vfd->device_caps & V4L2_CAP_IO_MC)
1116 		return  *(int *)arg ? -EINVAL : 0;
1117 
1118 	return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1119 }
1120 
1121 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1122 				struct file *file, void *fh, void *arg)
1123 {
1124 	struct video_device *vfd = video_devdata(file);
1125 
1126 	if (vfd->device_caps & V4L2_CAP_IO_MC)
1127 		return  *(int *)arg ? -EINVAL : 0;
1128 
1129 	return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1130 }
1131 
1132 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1133 				struct file *file, void *fh, void *arg)
1134 {
1135 	struct video_device *vfd;
1136 	u32 *p = arg;
1137 
1138 	vfd = video_devdata(file);
1139 	*p = v4l2_prio_max(vfd->prio);
1140 	return 0;
1141 }
1142 
1143 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1144 				struct file *file, void *fh, void *arg)
1145 {
1146 	struct video_device *vfd;
1147 	struct v4l2_fh *vfh;
1148 	u32 *p = arg;
1149 
1150 	vfd = video_devdata(file);
1151 	if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1152 		return -ENOTTY;
1153 	vfh = file->private_data;
1154 	return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1155 }
1156 
1157 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1158 				struct file *file, void *fh, void *arg)
1159 {
1160 	struct video_device *vfd = video_devdata(file);
1161 	struct v4l2_input *p = arg;
1162 
1163 	/*
1164 	 * We set the flags for CAP_DV_TIMINGS &
1165 	 * CAP_STD here based on ioctl handler provided by the
1166 	 * driver. If the driver doesn't support these
1167 	 * for a specific input, it must override these flags.
1168 	 */
1169 	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1170 		p->capabilities |= V4L2_IN_CAP_STD;
1171 
1172 	if (vfd->device_caps & V4L2_CAP_IO_MC) {
1173 		if (p->index)
1174 			return -EINVAL;
1175 		strscpy(p->name, vfd->name, sizeof(p->name));
1176 		p->type = V4L2_INPUT_TYPE_CAMERA;
1177 		return 0;
1178 	}
1179 
1180 	return ops->vidioc_enum_input(file, fh, p);
1181 }
1182 
1183 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1184 				struct file *file, void *fh, void *arg)
1185 {
1186 	struct video_device *vfd = video_devdata(file);
1187 	struct v4l2_output *p = arg;
1188 
1189 	/*
1190 	 * We set the flags for CAP_DV_TIMINGS &
1191 	 * CAP_STD here based on ioctl handler provided by the
1192 	 * driver. If the driver doesn't support these
1193 	 * for a specific output, it must override these flags.
1194 	 */
1195 	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1196 		p->capabilities |= V4L2_OUT_CAP_STD;
1197 
1198 	if (vfd->device_caps & V4L2_CAP_IO_MC) {
1199 		if (p->index)
1200 			return -EINVAL;
1201 		strscpy(p->name, vfd->name, sizeof(p->name));
1202 		p->type = V4L2_OUTPUT_TYPE_ANALOG;
1203 		return 0;
1204 	}
1205 
1206 	return ops->vidioc_enum_output(file, fh, p);
1207 }
1208 
1209 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1210 {
1211 	const unsigned sz = sizeof(fmt->description);
1212 	const char *descr = NULL;
1213 	u32 flags = 0;
1214 
1215 	/*
1216 	 * We depart from the normal coding style here since the descriptions
1217 	 * should be aligned so it is easy to see which descriptions will be
1218 	 * longer than 31 characters (the max length for a description).
1219 	 * And frankly, this is easier to read anyway.
1220 	 *
1221 	 * Note that gcc will use O(log N) comparisons to find the right case.
1222 	 */
1223 	switch (fmt->pixelformat) {
1224 	/* Max description length mask:	descr = "0123456789012345678901234567890" */
1225 	case V4L2_PIX_FMT_RGB332:	descr = "8-bit RGB 3-3-2"; break;
1226 	case V4L2_PIX_FMT_RGB444:	descr = "16-bit A/XRGB 4-4-4-4"; break;
1227 	case V4L2_PIX_FMT_ARGB444:	descr = "16-bit ARGB 4-4-4-4"; break;
1228 	case V4L2_PIX_FMT_XRGB444:	descr = "16-bit XRGB 4-4-4-4"; break;
1229 	case V4L2_PIX_FMT_RGBA444:	descr = "16-bit RGBA 4-4-4-4"; break;
1230 	case V4L2_PIX_FMT_RGBX444:	descr = "16-bit RGBX 4-4-4-4"; break;
1231 	case V4L2_PIX_FMT_ABGR444:	descr = "16-bit ABGR 4-4-4-4"; break;
1232 	case V4L2_PIX_FMT_XBGR444:	descr = "16-bit XBGR 4-4-4-4"; break;
1233 	case V4L2_PIX_FMT_BGRA444:	descr = "16-bit BGRA 4-4-4-4"; break;
1234 	case V4L2_PIX_FMT_BGRX444:	descr = "16-bit BGRX 4-4-4-4"; break;
1235 	case V4L2_PIX_FMT_RGB555:	descr = "16-bit A/XRGB 1-5-5-5"; break;
1236 	case V4L2_PIX_FMT_ARGB555:	descr = "16-bit ARGB 1-5-5-5"; break;
1237 	case V4L2_PIX_FMT_XRGB555:	descr = "16-bit XRGB 1-5-5-5"; break;
1238 	case V4L2_PIX_FMT_ABGR555:	descr = "16-bit ABGR 1-5-5-5"; break;
1239 	case V4L2_PIX_FMT_XBGR555:	descr = "16-bit XBGR 1-5-5-5"; break;
1240 	case V4L2_PIX_FMT_RGBA555:	descr = "16-bit RGBA 5-5-5-1"; break;
1241 	case V4L2_PIX_FMT_RGBX555:	descr = "16-bit RGBX 5-5-5-1"; break;
1242 	case V4L2_PIX_FMT_BGRA555:	descr = "16-bit BGRA 5-5-5-1"; break;
1243 	case V4L2_PIX_FMT_BGRX555:	descr = "16-bit BGRX 5-5-5-1"; break;
1244 	case V4L2_PIX_FMT_RGB565:	descr = "16-bit RGB 5-6-5"; break;
1245 	case V4L2_PIX_FMT_RGB555X:	descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1246 	case V4L2_PIX_FMT_ARGB555X:	descr = "16-bit ARGB 1-5-5-5 BE"; break;
1247 	case V4L2_PIX_FMT_XRGB555X:	descr = "16-bit XRGB 1-5-5-5 BE"; break;
1248 	case V4L2_PIX_FMT_RGB565X:	descr = "16-bit RGB 5-6-5 BE"; break;
1249 	case V4L2_PIX_FMT_BGR666:	descr = "18-bit BGRX 6-6-6-14"; break;
1250 	case V4L2_PIX_FMT_BGR24:	descr = "24-bit BGR 8-8-8"; break;
1251 	case V4L2_PIX_FMT_RGB24:	descr = "24-bit RGB 8-8-8"; break;
1252 	case V4L2_PIX_FMT_BGR32:	descr = "32-bit BGRA/X 8-8-8-8"; break;
1253 	case V4L2_PIX_FMT_ABGR32:	descr = "32-bit BGRA 8-8-8-8"; break;
1254 	case V4L2_PIX_FMT_XBGR32:	descr = "32-bit BGRX 8-8-8-8"; break;
1255 	case V4L2_PIX_FMT_RGB32:	descr = "32-bit A/XRGB 8-8-8-8"; break;
1256 	case V4L2_PIX_FMT_ARGB32:	descr = "32-bit ARGB 8-8-8-8"; break;
1257 	case V4L2_PIX_FMT_XRGB32:	descr = "32-bit XRGB 8-8-8-8"; break;
1258 	case V4L2_PIX_FMT_BGRA32:	descr = "32-bit ABGR 8-8-8-8"; break;
1259 	case V4L2_PIX_FMT_BGRX32:	descr = "32-bit XBGR 8-8-8-8"; break;
1260 	case V4L2_PIX_FMT_RGBA32:	descr = "32-bit RGBA 8-8-8-8"; break;
1261 	case V4L2_PIX_FMT_RGBX32:	descr = "32-bit RGBX 8-8-8-8"; break;
1262 	case V4L2_PIX_FMT_GREY:		descr = "8-bit Greyscale"; break;
1263 	case V4L2_PIX_FMT_Y4:		descr = "4-bit Greyscale"; break;
1264 	case V4L2_PIX_FMT_Y6:		descr = "6-bit Greyscale"; break;
1265 	case V4L2_PIX_FMT_Y10:		descr = "10-bit Greyscale"; break;
1266 	case V4L2_PIX_FMT_Y12:		descr = "12-bit Greyscale"; break;
1267 	case V4L2_PIX_FMT_Y14:		descr = "14-bit Greyscale"; break;
1268 	case V4L2_PIX_FMT_Y16:		descr = "16-bit Greyscale"; break;
1269 	case V4L2_PIX_FMT_Y16_BE:	descr = "16-bit Greyscale BE"; break;
1270 	case V4L2_PIX_FMT_Y10BPACK:	descr = "10-bit Greyscale (Packed)"; break;
1271 	case V4L2_PIX_FMT_Y10P:		descr = "10-bit Greyscale (MIPI Packed)"; break;
1272 	case V4L2_PIX_FMT_IPU3_Y10:	descr = "10-bit greyscale (IPU3 Packed)"; break;
1273 	case V4L2_PIX_FMT_Y8I:		descr = "Interleaved 8-bit Greyscale"; break;
1274 	case V4L2_PIX_FMT_Y12I:		descr = "Interleaved 12-bit Greyscale"; break;
1275 	case V4L2_PIX_FMT_Z16:		descr = "16-bit Depth"; break;
1276 	case V4L2_PIX_FMT_INZI:		descr = "Planar 10:16 Greyscale Depth"; break;
1277 	case V4L2_PIX_FMT_CNF4:		descr = "4-bit Depth Confidence (Packed)"; break;
1278 	case V4L2_PIX_FMT_PAL8:		descr = "8-bit Palette"; break;
1279 	case V4L2_PIX_FMT_UV8:		descr = "8-bit Chrominance UV 4-4"; break;
1280 	case V4L2_PIX_FMT_YVU410:	descr = "Planar YVU 4:1:0"; break;
1281 	case V4L2_PIX_FMT_YVU420:	descr = "Planar YVU 4:2:0"; break;
1282 	case V4L2_PIX_FMT_YUYV:		descr = "YUYV 4:2:2"; break;
1283 	case V4L2_PIX_FMT_YYUV:		descr = "YYUV 4:2:2"; break;
1284 	case V4L2_PIX_FMT_YVYU:		descr = "YVYU 4:2:2"; break;
1285 	case V4L2_PIX_FMT_UYVY:		descr = "UYVY 4:2:2"; break;
1286 	case V4L2_PIX_FMT_VYUY:		descr = "VYUY 4:2:2"; break;
1287 	case V4L2_PIX_FMT_YUV422P:	descr = "Planar YUV 4:2:2"; break;
1288 	case V4L2_PIX_FMT_YUV411P:	descr = "Planar YUV 4:1:1"; break;
1289 	case V4L2_PIX_FMT_Y41P:		descr = "YUV 4:1:1 (Packed)"; break;
1290 	case V4L2_PIX_FMT_YUV444:	descr = "16-bit A/XYUV 4-4-4-4"; break;
1291 	case V4L2_PIX_FMT_YUV555:	descr = "16-bit A/XYUV 1-5-5-5"; break;
1292 	case V4L2_PIX_FMT_YUV565:	descr = "16-bit YUV 5-6-5"; break;
1293 	case V4L2_PIX_FMT_YUV24:	descr = "24-bit YUV 4:4:4 8-8-8"; break;
1294 	case V4L2_PIX_FMT_YUV32:	descr = "32-bit A/XYUV 8-8-8-8"; break;
1295 	case V4L2_PIX_FMT_AYUV32:	descr = "32-bit AYUV 8-8-8-8"; break;
1296 	case V4L2_PIX_FMT_XYUV32:	descr = "32-bit XYUV 8-8-8-8"; break;
1297 	case V4L2_PIX_FMT_VUYA32:	descr = "32-bit VUYA 8-8-8-8"; break;
1298 	case V4L2_PIX_FMT_VUYX32:	descr = "32-bit VUYX 8-8-8-8"; break;
1299 	case V4L2_PIX_FMT_YUV410:	descr = "Planar YUV 4:1:0"; break;
1300 	case V4L2_PIX_FMT_YUV420:	descr = "Planar YUV 4:2:0"; break;
1301 	case V4L2_PIX_FMT_HI240:	descr = "8-bit Dithered RGB (BTTV)"; break;
1302 	case V4L2_PIX_FMT_M420:		descr = "YUV 4:2:0 (M420)"; break;
1303 	case V4L2_PIX_FMT_NV12:		descr = "Y/CbCr 4:2:0"; break;
1304 	case V4L2_PIX_FMT_NV21:		descr = "Y/CrCb 4:2:0"; break;
1305 	case V4L2_PIX_FMT_NV16:		descr = "Y/CbCr 4:2:2"; break;
1306 	case V4L2_PIX_FMT_NV61:		descr = "Y/CrCb 4:2:2"; break;
1307 	case V4L2_PIX_FMT_NV24:		descr = "Y/CbCr 4:4:4"; break;
1308 	case V4L2_PIX_FMT_NV42:		descr = "Y/CrCb 4:4:4"; break;
1309 	case V4L2_PIX_FMT_NV12_4L4:	descr = "Y/CbCr 4:2:0 (4x4 Linear)"; break;
1310 	case V4L2_PIX_FMT_NV12_16L16:	descr = "Y/CbCr 4:2:0 (16x16 Linear)"; break;
1311 	case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/CbCr 4:2:0 (32x32 Linear)"; break;
1312 	case V4L2_PIX_FMT_NV12M:	descr = "Y/CbCr 4:2:0 (N-C)"; break;
1313 	case V4L2_PIX_FMT_NV21M:	descr = "Y/CrCb 4:2:0 (N-C)"; break;
1314 	case V4L2_PIX_FMT_NV16M:	descr = "Y/CbCr 4:2:2 (N-C)"; break;
1315 	case V4L2_PIX_FMT_NV61M:	descr = "Y/CrCb 4:2:2 (N-C)"; break;
1316 	case V4L2_PIX_FMT_NV12MT:	descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1317 	case V4L2_PIX_FMT_NV12MT_16X16:	descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1318 	case V4L2_PIX_FMT_YUV420M:	descr = "Planar YUV 4:2:0 (N-C)"; break;
1319 	case V4L2_PIX_FMT_YVU420M:	descr = "Planar YVU 4:2:0 (N-C)"; break;
1320 	case V4L2_PIX_FMT_YUV422M:	descr = "Planar YUV 4:2:2 (N-C)"; break;
1321 	case V4L2_PIX_FMT_YVU422M:	descr = "Planar YVU 4:2:2 (N-C)"; break;
1322 	case V4L2_PIX_FMT_YUV444M:	descr = "Planar YUV 4:4:4 (N-C)"; break;
1323 	case V4L2_PIX_FMT_YVU444M:	descr = "Planar YVU 4:4:4 (N-C)"; break;
1324 	case V4L2_PIX_FMT_SBGGR8:	descr = "8-bit Bayer BGBG/GRGR"; break;
1325 	case V4L2_PIX_FMT_SGBRG8:	descr = "8-bit Bayer GBGB/RGRG"; break;
1326 	case V4L2_PIX_FMT_SGRBG8:	descr = "8-bit Bayer GRGR/BGBG"; break;
1327 	case V4L2_PIX_FMT_SRGGB8:	descr = "8-bit Bayer RGRG/GBGB"; break;
1328 	case V4L2_PIX_FMT_SBGGR10:	descr = "10-bit Bayer BGBG/GRGR"; break;
1329 	case V4L2_PIX_FMT_SGBRG10:	descr = "10-bit Bayer GBGB/RGRG"; break;
1330 	case V4L2_PIX_FMT_SGRBG10:	descr = "10-bit Bayer GRGR/BGBG"; break;
1331 	case V4L2_PIX_FMT_SRGGB10:	descr = "10-bit Bayer RGRG/GBGB"; break;
1332 	case V4L2_PIX_FMT_SBGGR10P:	descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1333 	case V4L2_PIX_FMT_SGBRG10P:	descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1334 	case V4L2_PIX_FMT_SGRBG10P:	descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1335 	case V4L2_PIX_FMT_SRGGB10P:	descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1336 	case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1337 	case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1338 	case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1339 	case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1340 	case V4L2_PIX_FMT_SBGGR10ALAW8:	descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1341 	case V4L2_PIX_FMT_SGBRG10ALAW8:	descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1342 	case V4L2_PIX_FMT_SGRBG10ALAW8:	descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1343 	case V4L2_PIX_FMT_SRGGB10ALAW8:	descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1344 	case V4L2_PIX_FMT_SBGGR10DPCM8:	descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1345 	case V4L2_PIX_FMT_SGBRG10DPCM8:	descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1346 	case V4L2_PIX_FMT_SGRBG10DPCM8:	descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1347 	case V4L2_PIX_FMT_SRGGB10DPCM8:	descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1348 	case V4L2_PIX_FMT_SBGGR12:	descr = "12-bit Bayer BGBG/GRGR"; break;
1349 	case V4L2_PIX_FMT_SGBRG12:	descr = "12-bit Bayer GBGB/RGRG"; break;
1350 	case V4L2_PIX_FMT_SGRBG12:	descr = "12-bit Bayer GRGR/BGBG"; break;
1351 	case V4L2_PIX_FMT_SRGGB12:	descr = "12-bit Bayer RGRG/GBGB"; break;
1352 	case V4L2_PIX_FMT_SBGGR12P:	descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1353 	case V4L2_PIX_FMT_SGBRG12P:	descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1354 	case V4L2_PIX_FMT_SGRBG12P:	descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1355 	case V4L2_PIX_FMT_SRGGB12P:	descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1356 	case V4L2_PIX_FMT_SBGGR14:	descr = "14-bit Bayer BGBG/GRGR"; break;
1357 	case V4L2_PIX_FMT_SGBRG14:	descr = "14-bit Bayer GBGB/RGRG"; break;
1358 	case V4L2_PIX_FMT_SGRBG14:	descr = "14-bit Bayer GRGR/BGBG"; break;
1359 	case V4L2_PIX_FMT_SRGGB14:	descr = "14-bit Bayer RGRG/GBGB"; break;
1360 	case V4L2_PIX_FMT_SBGGR14P:	descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1361 	case V4L2_PIX_FMT_SGBRG14P:	descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1362 	case V4L2_PIX_FMT_SGRBG14P:	descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1363 	case V4L2_PIX_FMT_SRGGB14P:	descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1364 	case V4L2_PIX_FMT_SBGGR16:	descr = "16-bit Bayer BGBG/GRGR"; break;
1365 	case V4L2_PIX_FMT_SGBRG16:	descr = "16-bit Bayer GBGB/RGRG"; break;
1366 	case V4L2_PIX_FMT_SGRBG16:	descr = "16-bit Bayer GRGR/BGBG"; break;
1367 	case V4L2_PIX_FMT_SRGGB16:	descr = "16-bit Bayer RGRG/GBGB"; break;
1368 	case V4L2_PIX_FMT_SN9C20X_I420:	descr = "GSPCA SN9C20X I420"; break;
1369 	case V4L2_PIX_FMT_SPCA501:	descr = "GSPCA SPCA501"; break;
1370 	case V4L2_PIX_FMT_SPCA505:	descr = "GSPCA SPCA505"; break;
1371 	case V4L2_PIX_FMT_SPCA508:	descr = "GSPCA SPCA508"; break;
1372 	case V4L2_PIX_FMT_STV0680:	descr = "GSPCA STV0680"; break;
1373 	case V4L2_PIX_FMT_TM6000:	descr = "A/V + VBI Mux Packet"; break;
1374 	case V4L2_PIX_FMT_CIT_YYVYUY:	descr = "GSPCA CIT YYVYUY"; break;
1375 	case V4L2_PIX_FMT_KONICA420:	descr = "GSPCA KONICA420"; break;
1376 	case V4L2_PIX_FMT_MM21:		descr = "Mediatek 8-bit Block Format"; break;
1377 	case V4L2_PIX_FMT_HSV24:	descr = "24-bit HSV 8-8-8"; break;
1378 	case V4L2_PIX_FMT_HSV32:	descr = "32-bit XHSV 8-8-8-8"; break;
1379 	case V4L2_SDR_FMT_CU8:		descr = "Complex U8"; break;
1380 	case V4L2_SDR_FMT_CU16LE:	descr = "Complex U16LE"; break;
1381 	case V4L2_SDR_FMT_CS8:		descr = "Complex S8"; break;
1382 	case V4L2_SDR_FMT_CS14LE:	descr = "Complex S14LE"; break;
1383 	case V4L2_SDR_FMT_RU12LE:	descr = "Real U12LE"; break;
1384 	case V4L2_SDR_FMT_PCU16BE:	descr = "Planar Complex U16BE"; break;
1385 	case V4L2_SDR_FMT_PCU18BE:	descr = "Planar Complex U18BE"; break;
1386 	case V4L2_SDR_FMT_PCU20BE:	descr = "Planar Complex U20BE"; break;
1387 	case V4L2_TCH_FMT_DELTA_TD16:	descr = "16-bit Signed Deltas"; break;
1388 	case V4L2_TCH_FMT_DELTA_TD08:	descr = "8-bit Signed Deltas"; break;
1389 	case V4L2_TCH_FMT_TU16:		descr = "16-bit Unsigned Touch Data"; break;
1390 	case V4L2_TCH_FMT_TU08:		descr = "8-bit Unsigned Touch Data"; break;
1391 	case V4L2_META_FMT_VSP1_HGO:	descr = "R-Car VSP1 1-D Histogram"; break;
1392 	case V4L2_META_FMT_VSP1_HGT:	descr = "R-Car VSP1 2-D Histogram"; break;
1393 	case V4L2_META_FMT_UVC:		descr = "UVC Payload Header Metadata"; break;
1394 	case V4L2_META_FMT_D4XX:	descr = "Intel D4xx UVC Metadata"; break;
1395 	case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1396 	case V4L2_META_FMT_RK_ISP1_PARAMS:	descr = "Rockchip ISP1 3A Parameters"; break;
1397 	case V4L2_META_FMT_RK_ISP1_STAT_3A:	descr = "Rockchip ISP1 3A Statistics"; break;
1398 	case V4L2_PIX_FMT_NV12M_8L128:	descr = "NV12M (8x128 Linear)"; break;
1399 	case V4L2_PIX_FMT_NV12M_10BE_8L128:	descr = "10-bit NV12M (8x128 Linear, BE)"; break;
1400 
1401 	default:
1402 		/* Compressed formats */
1403 		flags = V4L2_FMT_FLAG_COMPRESSED;
1404 		switch (fmt->pixelformat) {
1405 		/* Max description length mask:	descr = "0123456789012345678901234567890" */
1406 		case V4L2_PIX_FMT_MJPEG:	descr = "Motion-JPEG"; break;
1407 		case V4L2_PIX_FMT_JPEG:		descr = "JFIF JPEG"; break;
1408 		case V4L2_PIX_FMT_DV:		descr = "1394"; break;
1409 		case V4L2_PIX_FMT_MPEG:		descr = "MPEG-1/2/4"; break;
1410 		case V4L2_PIX_FMT_H264:		descr = "H.264"; break;
1411 		case V4L2_PIX_FMT_H264_NO_SC:	descr = "H.264 (No Start Codes)"; break;
1412 		case V4L2_PIX_FMT_H264_MVC:	descr = "H.264 MVC"; break;
1413 		case V4L2_PIX_FMT_H264_SLICE:	descr = "H.264 Parsed Slice Data"; break;
1414 		case V4L2_PIX_FMT_H263:		descr = "H.263"; break;
1415 		case V4L2_PIX_FMT_MPEG1:	descr = "MPEG-1 ES"; break;
1416 		case V4L2_PIX_FMT_MPEG2:	descr = "MPEG-2 ES"; break;
1417 		case V4L2_PIX_FMT_MPEG2_SLICE:	descr = "MPEG-2 Parsed Slice Data"; break;
1418 		case V4L2_PIX_FMT_MPEG4:	descr = "MPEG-4 Part 2 ES"; break;
1419 		case V4L2_PIX_FMT_XVID:		descr = "Xvid"; break;
1420 		case V4L2_PIX_FMT_VC1_ANNEX_G:	descr = "VC-1 (SMPTE 412M Annex G)"; break;
1421 		case V4L2_PIX_FMT_VC1_ANNEX_L:	descr = "VC-1 (SMPTE 412M Annex L)"; break;
1422 		case V4L2_PIX_FMT_VP8:		descr = "VP8"; break;
1423 		case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1424 		case V4L2_PIX_FMT_VP9:		descr = "VP9"; break;
1425 		case V4L2_PIX_FMT_VP9_FRAME:    descr = "VP9 Frame"; break;
1426 		case V4L2_PIX_FMT_HEVC:		descr = "HEVC"; break; /* aka H.265 */
1427 		case V4L2_PIX_FMT_HEVC_SLICE:	descr = "HEVC Parsed Slice Data"; break;
1428 		case V4L2_PIX_FMT_FWHT:		descr = "FWHT"; break; /* used in vicodec */
1429 		case V4L2_PIX_FMT_FWHT_STATELESS:	descr = "FWHT Stateless"; break; /* used in vicodec */
1430 		case V4L2_PIX_FMT_CPIA1:	descr = "GSPCA CPiA YUV"; break;
1431 		case V4L2_PIX_FMT_WNVA:		descr = "WNVA"; break;
1432 		case V4L2_PIX_FMT_SN9C10X:	descr = "GSPCA SN9C10X"; break;
1433 		case V4L2_PIX_FMT_PWC1:		descr = "Raw Philips Webcam Type (Old)"; break;
1434 		case V4L2_PIX_FMT_PWC2:		descr = "Raw Philips Webcam Type (New)"; break;
1435 		case V4L2_PIX_FMT_ET61X251:	descr = "GSPCA ET61X251"; break;
1436 		case V4L2_PIX_FMT_SPCA561:	descr = "GSPCA SPCA561"; break;
1437 		case V4L2_PIX_FMT_PAC207:	descr = "GSPCA PAC207"; break;
1438 		case V4L2_PIX_FMT_MR97310A:	descr = "GSPCA MR97310A"; break;
1439 		case V4L2_PIX_FMT_JL2005BCD:	descr = "GSPCA JL2005BCD"; break;
1440 		case V4L2_PIX_FMT_SN9C2028:	descr = "GSPCA SN9C2028"; break;
1441 		case V4L2_PIX_FMT_SQ905C:	descr = "GSPCA SQ905C"; break;
1442 		case V4L2_PIX_FMT_PJPG:		descr = "GSPCA PJPG"; break;
1443 		case V4L2_PIX_FMT_OV511:	descr = "GSPCA OV511"; break;
1444 		case V4L2_PIX_FMT_OV518:	descr = "GSPCA OV518"; break;
1445 		case V4L2_PIX_FMT_JPGL:		descr = "JPEG Lite"; break;
1446 		case V4L2_PIX_FMT_SE401:	descr = "GSPCA SE401"; break;
1447 		case V4L2_PIX_FMT_S5C_UYVY_JPG:	descr = "S5C73MX interleaved UYVY/JPEG"; break;
1448 		case V4L2_PIX_FMT_MT21C:	descr = "Mediatek Compressed Format"; break;
1449 		case V4L2_PIX_FMT_QC08C:	descr = "QCOM Compressed 8-bit Format"; break;
1450 		case V4L2_PIX_FMT_QC10C:	descr = "QCOM Compressed 10-bit Format"; break;
1451 		default:
1452 			if (fmt->description[0])
1453 				return;
1454 			WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1455 			flags = 0;
1456 			snprintf(fmt->description, sz, "%p4cc",
1457 				 &fmt->pixelformat);
1458 			break;
1459 		}
1460 	}
1461 
1462 	if (descr)
1463 		WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1464 	fmt->flags |= flags;
1465 }
1466 
1467 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1468 				struct file *file, void *fh, void *arg)
1469 {
1470 	struct video_device *vdev = video_devdata(file);
1471 	struct v4l2_fmtdesc *p = arg;
1472 	int ret = check_fmt(file, p->type);
1473 	u32 mbus_code;
1474 	u32 cap_mask;
1475 
1476 	if (ret)
1477 		return ret;
1478 	ret = -EINVAL;
1479 
1480 	if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1481 		p->mbus_code = 0;
1482 
1483 	mbus_code = p->mbus_code;
1484 	CLEAR_AFTER_FIELD(p, type);
1485 	p->mbus_code = mbus_code;
1486 
1487 	switch (p->type) {
1488 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1489 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1490 		cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1491 			   V4L2_CAP_VIDEO_M2M_MPLANE;
1492 		if (!!(vdev->device_caps & cap_mask) !=
1493 		    (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1494 			break;
1495 
1496 		if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1497 			break;
1498 		ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1499 		break;
1500 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1501 		if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1502 			break;
1503 		ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1504 		break;
1505 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1506 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1507 		cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1508 			   V4L2_CAP_VIDEO_M2M_MPLANE;
1509 		if (!!(vdev->device_caps & cap_mask) !=
1510 		    (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1511 			break;
1512 
1513 		if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1514 			break;
1515 		ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1516 		break;
1517 	case V4L2_BUF_TYPE_SDR_CAPTURE:
1518 		if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1519 			break;
1520 		ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1521 		break;
1522 	case V4L2_BUF_TYPE_SDR_OUTPUT:
1523 		if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1524 			break;
1525 		ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1526 		break;
1527 	case V4L2_BUF_TYPE_META_CAPTURE:
1528 		if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1529 			break;
1530 		ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1531 		break;
1532 	case V4L2_BUF_TYPE_META_OUTPUT:
1533 		if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1534 			break;
1535 		ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1536 		break;
1537 	}
1538 	if (ret == 0)
1539 		v4l_fill_fmtdesc(p);
1540 	return ret;
1541 }
1542 
1543 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1544 {
1545 	/*
1546 	 * The v4l2_pix_format structure contains fields that make no sense for
1547 	 * touch. Set them to default values in this case.
1548 	 */
1549 
1550 	p->field = V4L2_FIELD_NONE;
1551 	p->colorspace = V4L2_COLORSPACE_RAW;
1552 	p->flags = 0;
1553 	p->ycbcr_enc = 0;
1554 	p->quantization = 0;
1555 	p->xfer_func = 0;
1556 }
1557 
1558 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1559 				struct file *file, void *fh, void *arg)
1560 {
1561 	struct v4l2_format *p = arg;
1562 	struct video_device *vfd = video_devdata(file);
1563 	int ret = check_fmt(file, p->type);
1564 
1565 	if (ret)
1566 		return ret;
1567 
1568 	/*
1569 	 * fmt can't be cleared for these overlay types due to the 'clips'
1570 	 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1571 	 * Those are provided by the user. So handle these two overlay types
1572 	 * first, and then just do a simple memset for the other types.
1573 	 */
1574 	switch (p->type) {
1575 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1576 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1577 		struct v4l2_clip *clips = p->fmt.win.clips;
1578 		u32 clipcount = p->fmt.win.clipcount;
1579 		void __user *bitmap = p->fmt.win.bitmap;
1580 
1581 		memset(&p->fmt, 0, sizeof(p->fmt));
1582 		p->fmt.win.clips = clips;
1583 		p->fmt.win.clipcount = clipcount;
1584 		p->fmt.win.bitmap = bitmap;
1585 		break;
1586 	}
1587 	default:
1588 		memset(&p->fmt, 0, sizeof(p->fmt));
1589 		break;
1590 	}
1591 
1592 	switch (p->type) {
1593 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1594 		if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1595 			break;
1596 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1597 		ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1598 		/* just in case the driver zeroed it again */
1599 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1600 		if (vfd->vfl_type == VFL_TYPE_TOUCH)
1601 			v4l_pix_format_touch(&p->fmt.pix);
1602 		return ret;
1603 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1604 		return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1605 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1606 		return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1607 	case V4L2_BUF_TYPE_VBI_CAPTURE:
1608 		return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1609 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1610 		return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1611 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1612 		if (unlikely(!ops->vidioc_g_fmt_vid_out))
1613 			break;
1614 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1615 		ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1616 		/* just in case the driver zeroed it again */
1617 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1618 		return ret;
1619 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1620 		return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1621 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1622 		return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1623 	case V4L2_BUF_TYPE_VBI_OUTPUT:
1624 		return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1625 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1626 		return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1627 	case V4L2_BUF_TYPE_SDR_CAPTURE:
1628 		return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1629 	case V4L2_BUF_TYPE_SDR_OUTPUT:
1630 		return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1631 	case V4L2_BUF_TYPE_META_CAPTURE:
1632 		return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1633 	case V4L2_BUF_TYPE_META_OUTPUT:
1634 		return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1635 	}
1636 	return -EINVAL;
1637 }
1638 
1639 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1640 				struct file *file, void *fh, void *arg)
1641 {
1642 	struct v4l2_format *p = arg;
1643 	struct video_device *vfd = video_devdata(file);
1644 	int ret = check_fmt(file, p->type);
1645 	unsigned int i;
1646 
1647 	if (ret)
1648 		return ret;
1649 
1650 	ret = v4l_enable_media_source(vfd);
1651 	if (ret)
1652 		return ret;
1653 	v4l_sanitize_format(p);
1654 
1655 	switch (p->type) {
1656 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1657 		if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1658 			break;
1659 		CLEAR_AFTER_FIELD(p, fmt.pix);
1660 		ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1661 		/* just in case the driver zeroed it again */
1662 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1663 		if (vfd->vfl_type == VFL_TYPE_TOUCH)
1664 			v4l_pix_format_touch(&p->fmt.pix);
1665 		return ret;
1666 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1667 		if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1668 			break;
1669 		CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1670 		for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1671 			CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1672 					  bytesperline);
1673 		return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1674 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1675 		if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1676 			break;
1677 		CLEAR_AFTER_FIELD(p, fmt.win);
1678 		return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1679 	case V4L2_BUF_TYPE_VBI_CAPTURE:
1680 		if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1681 			break;
1682 		CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1683 		return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1684 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1685 		if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1686 			break;
1687 		CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1688 		return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1689 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1690 		if (unlikely(!ops->vidioc_s_fmt_vid_out))
1691 			break;
1692 		CLEAR_AFTER_FIELD(p, fmt.pix);
1693 		ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1694 		/* just in case the driver zeroed it again */
1695 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1696 		return ret;
1697 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1698 		if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1699 			break;
1700 		CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1701 		for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1702 			CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1703 					  bytesperline);
1704 		return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1705 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1706 		if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1707 			break;
1708 		CLEAR_AFTER_FIELD(p, fmt.win);
1709 		return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1710 	case V4L2_BUF_TYPE_VBI_OUTPUT:
1711 		if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1712 			break;
1713 		CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1714 		return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1715 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1716 		if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1717 			break;
1718 		CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1719 		return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1720 	case V4L2_BUF_TYPE_SDR_CAPTURE:
1721 		if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1722 			break;
1723 		CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1724 		return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1725 	case V4L2_BUF_TYPE_SDR_OUTPUT:
1726 		if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1727 			break;
1728 		CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1729 		return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1730 	case V4L2_BUF_TYPE_META_CAPTURE:
1731 		if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1732 			break;
1733 		CLEAR_AFTER_FIELD(p, fmt.meta);
1734 		return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1735 	case V4L2_BUF_TYPE_META_OUTPUT:
1736 		if (unlikely(!ops->vidioc_s_fmt_meta_out))
1737 			break;
1738 		CLEAR_AFTER_FIELD(p, fmt.meta);
1739 		return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1740 	}
1741 	return -EINVAL;
1742 }
1743 
1744 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1745 				struct file *file, void *fh, void *arg)
1746 {
1747 	struct v4l2_format *p = arg;
1748 	struct video_device *vfd = video_devdata(file);
1749 	int ret = check_fmt(file, p->type);
1750 	unsigned int i;
1751 
1752 	if (ret)
1753 		return ret;
1754 
1755 	v4l_sanitize_format(p);
1756 
1757 	switch (p->type) {
1758 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1759 		if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1760 			break;
1761 		CLEAR_AFTER_FIELD(p, fmt.pix);
1762 		ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1763 		/* just in case the driver zeroed it again */
1764 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1765 		if (vfd->vfl_type == VFL_TYPE_TOUCH)
1766 			v4l_pix_format_touch(&p->fmt.pix);
1767 		return ret;
1768 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1769 		if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1770 			break;
1771 		CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1772 		for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1773 			CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1774 					  bytesperline);
1775 		return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1776 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1777 		if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1778 			break;
1779 		CLEAR_AFTER_FIELD(p, fmt.win);
1780 		return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1781 	case V4L2_BUF_TYPE_VBI_CAPTURE:
1782 		if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1783 			break;
1784 		CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1785 		return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1786 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1787 		if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1788 			break;
1789 		CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1790 		return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1791 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1792 		if (unlikely(!ops->vidioc_try_fmt_vid_out))
1793 			break;
1794 		CLEAR_AFTER_FIELD(p, fmt.pix);
1795 		ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1796 		/* just in case the driver zeroed it again */
1797 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1798 		return ret;
1799 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1800 		if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1801 			break;
1802 		CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1803 		for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1804 			CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1805 					  bytesperline);
1806 		return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1807 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1808 		if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1809 			break;
1810 		CLEAR_AFTER_FIELD(p, fmt.win);
1811 		return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1812 	case V4L2_BUF_TYPE_VBI_OUTPUT:
1813 		if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1814 			break;
1815 		CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1816 		return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1817 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1818 		if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1819 			break;
1820 		CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1821 		return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1822 	case V4L2_BUF_TYPE_SDR_CAPTURE:
1823 		if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1824 			break;
1825 		CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1826 		return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1827 	case V4L2_BUF_TYPE_SDR_OUTPUT:
1828 		if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1829 			break;
1830 		CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1831 		return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1832 	case V4L2_BUF_TYPE_META_CAPTURE:
1833 		if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1834 			break;
1835 		CLEAR_AFTER_FIELD(p, fmt.meta);
1836 		return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1837 	case V4L2_BUF_TYPE_META_OUTPUT:
1838 		if (unlikely(!ops->vidioc_try_fmt_meta_out))
1839 			break;
1840 		CLEAR_AFTER_FIELD(p, fmt.meta);
1841 		return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1842 	}
1843 	return -EINVAL;
1844 }
1845 
1846 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1847 				struct file *file, void *fh, void *arg)
1848 {
1849 	return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1850 }
1851 
1852 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1853 				struct file *file, void *fh, void *arg)
1854 {
1855 	return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1856 }
1857 
1858 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1859 				struct file *file, void *fh, void *arg)
1860 {
1861 	struct video_device *vfd = video_devdata(file);
1862 	struct v4l2_tuner *p = arg;
1863 	int err;
1864 
1865 	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1866 			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1867 	err = ops->vidioc_g_tuner(file, fh, p);
1868 	if (!err)
1869 		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1870 	return err;
1871 }
1872 
1873 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1874 				struct file *file, void *fh, void *arg)
1875 {
1876 	struct video_device *vfd = video_devdata(file);
1877 	struct v4l2_tuner *p = arg;
1878 	int ret;
1879 
1880 	ret = v4l_enable_media_source(vfd);
1881 	if (ret)
1882 		return ret;
1883 	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1884 			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1885 	return ops->vidioc_s_tuner(file, fh, p);
1886 }
1887 
1888 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1889 				struct file *file, void *fh, void *arg)
1890 {
1891 	struct video_device *vfd = video_devdata(file);
1892 	struct v4l2_modulator *p = arg;
1893 	int err;
1894 
1895 	if (vfd->vfl_type == VFL_TYPE_RADIO)
1896 		p->type = V4L2_TUNER_RADIO;
1897 
1898 	err = ops->vidioc_g_modulator(file, fh, p);
1899 	if (!err)
1900 		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1901 	return err;
1902 }
1903 
1904 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1905 				struct file *file, void *fh, void *arg)
1906 {
1907 	struct video_device *vfd = video_devdata(file);
1908 	struct v4l2_modulator *p = arg;
1909 
1910 	if (vfd->vfl_type == VFL_TYPE_RADIO)
1911 		p->type = V4L2_TUNER_RADIO;
1912 
1913 	return ops->vidioc_s_modulator(file, fh, p);
1914 }
1915 
1916 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1917 				struct file *file, void *fh, void *arg)
1918 {
1919 	struct video_device *vfd = video_devdata(file);
1920 	struct v4l2_frequency *p = arg;
1921 
1922 	if (vfd->vfl_type == VFL_TYPE_SDR)
1923 		p->type = V4L2_TUNER_SDR;
1924 	else
1925 		p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1926 				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1927 	return ops->vidioc_g_frequency(file, fh, p);
1928 }
1929 
1930 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1931 				struct file *file, void *fh, void *arg)
1932 {
1933 	struct video_device *vfd = video_devdata(file);
1934 	const struct v4l2_frequency *p = arg;
1935 	enum v4l2_tuner_type type;
1936 	int ret;
1937 
1938 	ret = v4l_enable_media_source(vfd);
1939 	if (ret)
1940 		return ret;
1941 	if (vfd->vfl_type == VFL_TYPE_SDR) {
1942 		if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1943 			return -EINVAL;
1944 	} else {
1945 		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1946 				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1947 		if (type != p->type)
1948 			return -EINVAL;
1949 	}
1950 	return ops->vidioc_s_frequency(file, fh, p);
1951 }
1952 
1953 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1954 				struct file *file, void *fh, void *arg)
1955 {
1956 	struct video_device *vfd = video_devdata(file);
1957 	struct v4l2_standard *p = arg;
1958 
1959 	return v4l_video_std_enumstd(p, vfd->tvnorms);
1960 }
1961 
1962 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1963 				struct file *file, void *fh, void *arg)
1964 {
1965 	struct video_device *vfd = video_devdata(file);
1966 	v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1967 	int ret;
1968 
1969 	ret = v4l_enable_media_source(vfd);
1970 	if (ret)
1971 		return ret;
1972 	norm = id & vfd->tvnorms;
1973 	if (vfd->tvnorms && !norm)	/* Check if std is supported */
1974 		return -EINVAL;
1975 
1976 	/* Calls the specific handler */
1977 	return ops->vidioc_s_std(file, fh, norm);
1978 }
1979 
1980 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1981 				struct file *file, void *fh, void *arg)
1982 {
1983 	struct video_device *vfd = video_devdata(file);
1984 	v4l2_std_id *p = arg;
1985 	int ret;
1986 
1987 	ret = v4l_enable_media_source(vfd);
1988 	if (ret)
1989 		return ret;
1990 	/*
1991 	 * If no signal is detected, then the driver should return
1992 	 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1993 	 * any standards that do not apply removed.
1994 	 *
1995 	 * This means that tuners, audio and video decoders can join
1996 	 * their efforts to improve the standards detection.
1997 	 */
1998 	*p = vfd->tvnorms;
1999 	return ops->vidioc_querystd(file, fh, arg);
2000 }
2001 
2002 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2003 				struct file *file, void *fh, void *arg)
2004 {
2005 	struct video_device *vfd = video_devdata(file);
2006 	struct v4l2_hw_freq_seek *p = arg;
2007 	enum v4l2_tuner_type type;
2008 	int ret;
2009 
2010 	ret = v4l_enable_media_source(vfd);
2011 	if (ret)
2012 		return ret;
2013 	/* s_hw_freq_seek is not supported for SDR for now */
2014 	if (vfd->vfl_type == VFL_TYPE_SDR)
2015 		return -EINVAL;
2016 
2017 	type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2018 		V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2019 	if (p->type != type)
2020 		return -EINVAL;
2021 	return ops->vidioc_s_hw_freq_seek(file, fh, p);
2022 }
2023 
2024 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2025 				struct file *file, void *fh, void *arg)
2026 {
2027 	return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2028 }
2029 
2030 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2031 				struct file *file, void *fh, void *arg)
2032 {
2033 	struct v4l2_requestbuffers *p = arg;
2034 	int ret = check_fmt(file, p->type);
2035 
2036 	if (ret)
2037 		return ret;
2038 
2039 	CLEAR_AFTER_FIELD(p, flags);
2040 
2041 	return ops->vidioc_reqbufs(file, fh, p);
2042 }
2043 
2044 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2045 				struct file *file, void *fh, void *arg)
2046 {
2047 	struct v4l2_buffer *p = arg;
2048 	int ret = check_fmt(file, p->type);
2049 
2050 	return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2051 }
2052 
2053 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2054 				struct file *file, void *fh, void *arg)
2055 {
2056 	struct v4l2_buffer *p = arg;
2057 	int ret = check_fmt(file, p->type);
2058 
2059 	return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2060 }
2061 
2062 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2063 				struct file *file, void *fh, void *arg)
2064 {
2065 	struct v4l2_buffer *p = arg;
2066 	int ret = check_fmt(file, p->type);
2067 
2068 	return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2069 }
2070 
2071 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2072 				struct file *file, void *fh, void *arg)
2073 {
2074 	struct v4l2_create_buffers *create = arg;
2075 	int ret = check_fmt(file, create->format.type);
2076 
2077 	if (ret)
2078 		return ret;
2079 
2080 	CLEAR_AFTER_FIELD(create, flags);
2081 
2082 	v4l_sanitize_format(&create->format);
2083 
2084 	ret = ops->vidioc_create_bufs(file, fh, create);
2085 
2086 	if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2087 	    create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2088 		create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2089 
2090 	return ret;
2091 }
2092 
2093 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2094 				struct file *file, void *fh, void *arg)
2095 {
2096 	struct v4l2_buffer *b = arg;
2097 	int ret = check_fmt(file, b->type);
2098 
2099 	return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2100 }
2101 
2102 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2103 				struct file *file, void *fh, void *arg)
2104 {
2105 	struct video_device *vfd = video_devdata(file);
2106 	struct v4l2_streamparm *p = arg;
2107 	v4l2_std_id std;
2108 	int ret = check_fmt(file, p->type);
2109 
2110 	if (ret)
2111 		return ret;
2112 	if (ops->vidioc_g_parm)
2113 		return ops->vidioc_g_parm(file, fh, p);
2114 	if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2115 	    p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2116 		return -EINVAL;
2117 	if (vfd->device_caps & V4L2_CAP_READWRITE)
2118 		p->parm.capture.readbuffers = 2;
2119 	ret = ops->vidioc_g_std(file, fh, &std);
2120 	if (ret == 0)
2121 		v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2122 	return ret;
2123 }
2124 
2125 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2126 				struct file *file, void *fh, void *arg)
2127 {
2128 	struct v4l2_streamparm *p = arg;
2129 	int ret = check_fmt(file, p->type);
2130 
2131 	if (ret)
2132 		return ret;
2133 
2134 	/* Note: extendedmode is never used in drivers */
2135 	if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2136 		memset(p->parm.output.reserved, 0,
2137 		       sizeof(p->parm.output.reserved));
2138 		p->parm.output.extendedmode = 0;
2139 		p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2140 	} else {
2141 		memset(p->parm.capture.reserved, 0,
2142 		       sizeof(p->parm.capture.reserved));
2143 		p->parm.capture.extendedmode = 0;
2144 		p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2145 	}
2146 	return ops->vidioc_s_parm(file, fh, p);
2147 }
2148 
2149 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2150 				struct file *file, void *fh, void *arg)
2151 {
2152 	struct video_device *vfd = video_devdata(file);
2153 	struct v4l2_queryctrl *p = arg;
2154 	struct v4l2_fh *vfh =
2155 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2156 
2157 	if (vfh && vfh->ctrl_handler)
2158 		return v4l2_queryctrl(vfh->ctrl_handler, p);
2159 	if (vfd->ctrl_handler)
2160 		return v4l2_queryctrl(vfd->ctrl_handler, p);
2161 	if (ops->vidioc_queryctrl)
2162 		return ops->vidioc_queryctrl(file, fh, p);
2163 	return -ENOTTY;
2164 }
2165 
2166 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2167 				struct file *file, void *fh, void *arg)
2168 {
2169 	struct video_device *vfd = video_devdata(file);
2170 	struct v4l2_query_ext_ctrl *p = arg;
2171 	struct v4l2_fh *vfh =
2172 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2173 
2174 	if (vfh && vfh->ctrl_handler)
2175 		return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2176 	if (vfd->ctrl_handler)
2177 		return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2178 	if (ops->vidioc_query_ext_ctrl)
2179 		return ops->vidioc_query_ext_ctrl(file, fh, p);
2180 	return -ENOTTY;
2181 }
2182 
2183 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2184 				struct file *file, void *fh, void *arg)
2185 {
2186 	struct video_device *vfd = video_devdata(file);
2187 	struct v4l2_querymenu *p = arg;
2188 	struct v4l2_fh *vfh =
2189 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2190 
2191 	if (vfh && vfh->ctrl_handler)
2192 		return v4l2_querymenu(vfh->ctrl_handler, p);
2193 	if (vfd->ctrl_handler)
2194 		return v4l2_querymenu(vfd->ctrl_handler, p);
2195 	if (ops->vidioc_querymenu)
2196 		return ops->vidioc_querymenu(file, fh, p);
2197 	return -ENOTTY;
2198 }
2199 
2200 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2201 				struct file *file, void *fh, void *arg)
2202 {
2203 	struct video_device *vfd = video_devdata(file);
2204 	struct v4l2_control *p = arg;
2205 	struct v4l2_fh *vfh =
2206 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2207 	struct v4l2_ext_controls ctrls;
2208 	struct v4l2_ext_control ctrl;
2209 
2210 	if (vfh && vfh->ctrl_handler)
2211 		return v4l2_g_ctrl(vfh->ctrl_handler, p);
2212 	if (vfd->ctrl_handler)
2213 		return v4l2_g_ctrl(vfd->ctrl_handler, p);
2214 	if (ops->vidioc_g_ctrl)
2215 		return ops->vidioc_g_ctrl(file, fh, p);
2216 	if (ops->vidioc_g_ext_ctrls == NULL)
2217 		return -ENOTTY;
2218 
2219 	ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2220 	ctrls.count = 1;
2221 	ctrls.controls = &ctrl;
2222 	ctrl.id = p->id;
2223 	ctrl.value = p->value;
2224 	if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
2225 		int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2226 
2227 		if (ret == 0)
2228 			p->value = ctrl.value;
2229 		return ret;
2230 	}
2231 	return -EINVAL;
2232 }
2233 
2234 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2235 				struct file *file, void *fh, void *arg)
2236 {
2237 	struct video_device *vfd = video_devdata(file);
2238 	struct v4l2_control *p = arg;
2239 	struct v4l2_fh *vfh =
2240 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2241 	struct v4l2_ext_controls ctrls;
2242 	struct v4l2_ext_control ctrl;
2243 	int ret;
2244 
2245 	if (vfh && vfh->ctrl_handler)
2246 		return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2247 	if (vfd->ctrl_handler)
2248 		return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2249 	if (ops->vidioc_s_ctrl)
2250 		return ops->vidioc_s_ctrl(file, fh, p);
2251 	if (ops->vidioc_s_ext_ctrls == NULL)
2252 		return -ENOTTY;
2253 
2254 	ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2255 	ctrls.count = 1;
2256 	ctrls.controls = &ctrl;
2257 	ctrl.id = p->id;
2258 	ctrl.value = p->value;
2259 	if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
2260 		return -EINVAL;
2261 	ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2262 	p->value = ctrl.value;
2263 	return ret;
2264 }
2265 
2266 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2267 				struct file *file, void *fh, void *arg)
2268 {
2269 	struct video_device *vfd = video_devdata(file);
2270 	struct v4l2_ext_controls *p = arg;
2271 	struct v4l2_fh *vfh =
2272 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2273 
2274 	p->error_idx = p->count;
2275 	if (vfh && vfh->ctrl_handler)
2276 		return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2277 					vfd, vfd->v4l2_dev->mdev, p);
2278 	if (vfd->ctrl_handler)
2279 		return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2280 					vfd, vfd->v4l2_dev->mdev, p);
2281 	if (ops->vidioc_g_ext_ctrls == NULL)
2282 		return -ENOTTY;
2283 	return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
2284 				ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2285 }
2286 
2287 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2288 				struct file *file, void *fh, void *arg)
2289 {
2290 	struct video_device *vfd = video_devdata(file);
2291 	struct v4l2_ext_controls *p = arg;
2292 	struct v4l2_fh *vfh =
2293 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2294 
2295 	p->error_idx = p->count;
2296 	if (vfh && vfh->ctrl_handler)
2297 		return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2298 					vfd, vfd->v4l2_dev->mdev, p);
2299 	if (vfd->ctrl_handler)
2300 		return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2301 					vfd, vfd->v4l2_dev->mdev, p);
2302 	if (ops->vidioc_s_ext_ctrls == NULL)
2303 		return -ENOTTY;
2304 	return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
2305 				ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2306 }
2307 
2308 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2309 				struct file *file, void *fh, void *arg)
2310 {
2311 	struct video_device *vfd = video_devdata(file);
2312 	struct v4l2_ext_controls *p = arg;
2313 	struct v4l2_fh *vfh =
2314 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2315 
2316 	p->error_idx = p->count;
2317 	if (vfh && vfh->ctrl_handler)
2318 		return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2319 					  vfd, vfd->v4l2_dev->mdev, p);
2320 	if (vfd->ctrl_handler)
2321 		return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2322 					  vfd, vfd->v4l2_dev->mdev, p);
2323 	if (ops->vidioc_try_ext_ctrls == NULL)
2324 		return -ENOTTY;
2325 	return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
2326 			ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2327 }
2328 
2329 /*
2330  * The selection API specified originally that the _MPLANE buffer types
2331  * shouldn't be used. The reasons for this are lost in the mists of time
2332  * (or just really crappy memories). Regardless, this is really annoying
2333  * for userspace. So to keep things simple we map _MPLANE buffer types
2334  * to their 'regular' counterparts before calling the driver. And we
2335  * restore it afterwards. This way applications can use either buffer
2336  * type and drivers don't need to check for both.
2337  */
2338 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2339 			   struct file *file, void *fh, void *arg)
2340 {
2341 	struct v4l2_selection *p = arg;
2342 	u32 old_type = p->type;
2343 	int ret;
2344 
2345 	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2346 		p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2347 	else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2348 		p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2349 	ret = ops->vidioc_g_selection(file, fh, p);
2350 	p->type = old_type;
2351 	return ret;
2352 }
2353 
2354 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2355 			   struct file *file, void *fh, void *arg)
2356 {
2357 	struct v4l2_selection *p = arg;
2358 	u32 old_type = p->type;
2359 	int ret;
2360 
2361 	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2362 		p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2363 	else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2364 		p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2365 	ret = ops->vidioc_s_selection(file, fh, p);
2366 	p->type = old_type;
2367 	return ret;
2368 }
2369 
2370 static int v4l_g_crop(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_crop *p = arg;
2375 	struct v4l2_selection s = {
2376 		.type = p->type,
2377 	};
2378 	int ret;
2379 
2380 	/* simulate capture crop using selection api */
2381 
2382 	/* crop means compose for output devices */
2383 	if (V4L2_TYPE_IS_OUTPUT(p->type))
2384 		s.target = V4L2_SEL_TGT_COMPOSE;
2385 	else
2386 		s.target = V4L2_SEL_TGT_CROP;
2387 
2388 	if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2389 		s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2390 			V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2391 
2392 	ret = v4l_g_selection(ops, file, fh, &s);
2393 
2394 	/* copying results to old structure on success */
2395 	if (!ret)
2396 		p->c = s.r;
2397 	return ret;
2398 }
2399 
2400 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2401 				struct file *file, void *fh, void *arg)
2402 {
2403 	struct video_device *vfd = video_devdata(file);
2404 	struct v4l2_crop *p = arg;
2405 	struct v4l2_selection s = {
2406 		.type = p->type,
2407 		.r = p->c,
2408 	};
2409 
2410 	/* simulate capture crop using selection api */
2411 
2412 	/* crop means compose for output devices */
2413 	if (V4L2_TYPE_IS_OUTPUT(p->type))
2414 		s.target = V4L2_SEL_TGT_COMPOSE;
2415 	else
2416 		s.target = V4L2_SEL_TGT_CROP;
2417 
2418 	if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2419 		s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2420 			V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2421 
2422 	return v4l_s_selection(ops, file, fh, &s);
2423 }
2424 
2425 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2426 				struct file *file, void *fh, void *arg)
2427 {
2428 	struct video_device *vfd = video_devdata(file);
2429 	struct v4l2_cropcap *p = arg;
2430 	struct v4l2_selection s = { .type = p->type };
2431 	int ret = 0;
2432 
2433 	/* setting trivial pixelaspect */
2434 	p->pixelaspect.numerator = 1;
2435 	p->pixelaspect.denominator = 1;
2436 
2437 	if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2438 		s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2439 	else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2440 		s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2441 
2442 	/*
2443 	 * The determine_valid_ioctls() call already should ensure
2444 	 * that this can never happen, but just in case...
2445 	 */
2446 	if (WARN_ON(!ops->vidioc_g_selection))
2447 		return -ENOTTY;
2448 
2449 	if (ops->vidioc_g_pixelaspect)
2450 		ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2451 						&p->pixelaspect);
2452 
2453 	/*
2454 	 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2455 	 * square pixel aspect ratio in that case.
2456 	 */
2457 	if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2458 		return ret;
2459 
2460 	/* Use g_selection() to fill in the bounds and defrect rectangles */
2461 
2462 	/* obtaining bounds */
2463 	if (V4L2_TYPE_IS_OUTPUT(p->type))
2464 		s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2465 	else
2466 		s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2467 
2468 	if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2469 		s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2470 			V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2471 
2472 	ret = v4l_g_selection(ops, file, fh, &s);
2473 	if (ret)
2474 		return ret;
2475 	p->bounds = s.r;
2476 
2477 	/* obtaining defrect */
2478 	if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2479 		s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2480 	else
2481 		s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2482 
2483 	ret = v4l_g_selection(ops, file, fh, &s);
2484 	if (ret)
2485 		return ret;
2486 	p->defrect = s.r;
2487 
2488 	return 0;
2489 }
2490 
2491 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2492 				struct file *file, void *fh, void *arg)
2493 {
2494 	struct video_device *vfd = video_devdata(file);
2495 	int ret;
2496 
2497 	if (vfd->v4l2_dev)
2498 		pr_info("%s: =================  START STATUS  =================\n",
2499 			vfd->v4l2_dev->name);
2500 	ret = ops->vidioc_log_status(file, fh);
2501 	if (vfd->v4l2_dev)
2502 		pr_info("%s: ==================  END STATUS  ==================\n",
2503 			vfd->v4l2_dev->name);
2504 	return ret;
2505 }
2506 
2507 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2508 				struct file *file, void *fh, void *arg)
2509 {
2510 #ifdef CONFIG_VIDEO_ADV_DEBUG
2511 	struct v4l2_dbg_register *p = arg;
2512 	struct video_device *vfd = video_devdata(file);
2513 	struct v4l2_subdev *sd;
2514 	int idx = 0;
2515 
2516 	if (!capable(CAP_SYS_ADMIN))
2517 		return -EPERM;
2518 	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2519 		if (vfd->v4l2_dev == NULL)
2520 			return -EINVAL;
2521 		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2522 			if (p->match.addr == idx++)
2523 				return v4l2_subdev_call(sd, core, g_register, p);
2524 		return -EINVAL;
2525 	}
2526 	if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2527 	    (ops->vidioc_g_chip_info || p->match.addr == 0))
2528 		return ops->vidioc_g_register(file, fh, p);
2529 	return -EINVAL;
2530 #else
2531 	return -ENOTTY;
2532 #endif
2533 }
2534 
2535 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2536 				struct file *file, void *fh, void *arg)
2537 {
2538 #ifdef CONFIG_VIDEO_ADV_DEBUG
2539 	const struct v4l2_dbg_register *p = arg;
2540 	struct video_device *vfd = video_devdata(file);
2541 	struct v4l2_subdev *sd;
2542 	int idx = 0;
2543 
2544 	if (!capable(CAP_SYS_ADMIN))
2545 		return -EPERM;
2546 	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2547 		if (vfd->v4l2_dev == NULL)
2548 			return -EINVAL;
2549 		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2550 			if (p->match.addr == idx++)
2551 				return v4l2_subdev_call(sd, core, s_register, p);
2552 		return -EINVAL;
2553 	}
2554 	if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2555 	    (ops->vidioc_g_chip_info || p->match.addr == 0))
2556 		return ops->vidioc_s_register(file, fh, p);
2557 	return -EINVAL;
2558 #else
2559 	return -ENOTTY;
2560 #endif
2561 }
2562 
2563 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2564 				struct file *file, void *fh, void *arg)
2565 {
2566 #ifdef CONFIG_VIDEO_ADV_DEBUG
2567 	struct video_device *vfd = video_devdata(file);
2568 	struct v4l2_dbg_chip_info *p = arg;
2569 	struct v4l2_subdev *sd;
2570 	int idx = 0;
2571 
2572 	switch (p->match.type) {
2573 	case V4L2_CHIP_MATCH_BRIDGE:
2574 		if (ops->vidioc_s_register)
2575 			p->flags |= V4L2_CHIP_FL_WRITABLE;
2576 		if (ops->vidioc_g_register)
2577 			p->flags |= V4L2_CHIP_FL_READABLE;
2578 		strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2579 		if (ops->vidioc_g_chip_info)
2580 			return ops->vidioc_g_chip_info(file, fh, arg);
2581 		if (p->match.addr)
2582 			return -EINVAL;
2583 		return 0;
2584 
2585 	case V4L2_CHIP_MATCH_SUBDEV:
2586 		if (vfd->v4l2_dev == NULL)
2587 			break;
2588 		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2589 			if (p->match.addr != idx++)
2590 				continue;
2591 			if (sd->ops->core && sd->ops->core->s_register)
2592 				p->flags |= V4L2_CHIP_FL_WRITABLE;
2593 			if (sd->ops->core && sd->ops->core->g_register)
2594 				p->flags |= V4L2_CHIP_FL_READABLE;
2595 			strscpy(p->name, sd->name, sizeof(p->name));
2596 			return 0;
2597 		}
2598 		break;
2599 	}
2600 	return -EINVAL;
2601 #else
2602 	return -ENOTTY;
2603 #endif
2604 }
2605 
2606 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2607 				struct file *file, void *fh, void *arg)
2608 {
2609 	return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2610 }
2611 
2612 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2613 				struct file *file, void *fh, void *arg)
2614 {
2615 	return ops->vidioc_subscribe_event(fh, arg);
2616 }
2617 
2618 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2619 				struct file *file, void *fh, void *arg)
2620 {
2621 	return ops->vidioc_unsubscribe_event(fh, arg);
2622 }
2623 
2624 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2625 				struct file *file, void *fh, void *arg)
2626 {
2627 	struct v4l2_sliced_vbi_cap *p = arg;
2628 	int ret = check_fmt(file, p->type);
2629 
2630 	if (ret)
2631 		return ret;
2632 
2633 	/* Clear up to type, everything after type is zeroed already */
2634 	memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2635 
2636 	return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2637 }
2638 
2639 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2640 				struct file *file, void *fh, void *arg)
2641 {
2642 	struct video_device *vfd = video_devdata(file);
2643 	struct v4l2_frequency_band *p = arg;
2644 	enum v4l2_tuner_type type;
2645 	int err;
2646 
2647 	if (vfd->vfl_type == VFL_TYPE_SDR) {
2648 		if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2649 			return -EINVAL;
2650 		type = p->type;
2651 	} else {
2652 		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2653 				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2654 		if (type != p->type)
2655 			return -EINVAL;
2656 	}
2657 	if (ops->vidioc_enum_freq_bands) {
2658 		err = ops->vidioc_enum_freq_bands(file, fh, p);
2659 		if (err != -ENOTTY)
2660 			return err;
2661 	}
2662 	if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2663 		struct v4l2_tuner t = {
2664 			.index = p->tuner,
2665 			.type = type,
2666 		};
2667 
2668 		if (p->index)
2669 			return -EINVAL;
2670 		err = ops->vidioc_g_tuner(file, fh, &t);
2671 		if (err)
2672 			return err;
2673 		p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2674 		p->rangelow = t.rangelow;
2675 		p->rangehigh = t.rangehigh;
2676 		p->modulation = (type == V4L2_TUNER_RADIO) ?
2677 			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2678 		return 0;
2679 	}
2680 	if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2681 		struct v4l2_modulator m = {
2682 			.index = p->tuner,
2683 		};
2684 
2685 		if (type != V4L2_TUNER_RADIO)
2686 			return -EINVAL;
2687 		if (p->index)
2688 			return -EINVAL;
2689 		err = ops->vidioc_g_modulator(file, fh, &m);
2690 		if (err)
2691 			return err;
2692 		p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2693 		p->rangelow = m.rangelow;
2694 		p->rangehigh = m.rangehigh;
2695 		p->modulation = (type == V4L2_TUNER_RADIO) ?
2696 			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2697 		return 0;
2698 	}
2699 	return -ENOTTY;
2700 }
2701 
2702 struct v4l2_ioctl_info {
2703 	unsigned int ioctl;
2704 	u32 flags;
2705 	const char * const name;
2706 	int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2707 		    void *fh, void *p);
2708 	void (*debug)(const void *arg, bool write_only);
2709 };
2710 
2711 /* This control needs a priority check */
2712 #define INFO_FL_PRIO		(1 << 0)
2713 /* This control can be valid if the filehandle passes a control handler. */
2714 #define INFO_FL_CTRL		(1 << 1)
2715 /* Queuing ioctl */
2716 #define INFO_FL_QUEUE		(1 << 2)
2717 /* Always copy back result, even on error */
2718 #define INFO_FL_ALWAYS_COPY	(1 << 3)
2719 /* Zero struct from after the field to the end */
2720 #define INFO_FL_CLEAR(v4l2_struct, field)			\
2721 	((offsetof(struct v4l2_struct, field) +			\
2722 	  sizeof_field(struct v4l2_struct, field)) << 16)
2723 #define INFO_FL_CLEAR_MASK	(_IOC_SIZEMASK << 16)
2724 
2725 #define DEFINE_V4L_STUB_FUNC(_vidioc)				\
2726 	static int v4l_stub_ ## _vidioc(			\
2727 			const struct v4l2_ioctl_ops *ops,	\
2728 			struct file *file, void *fh, void *p)	\
2729 	{							\
2730 		return ops->vidioc_ ## _vidioc(file, fh, p);	\
2731 	}
2732 
2733 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)		\
2734 	[_IOC_NR(_ioctl)] = {					\
2735 		.ioctl = _ioctl,				\
2736 		.flags = _flags,				\
2737 		.name = #_ioctl,				\
2738 		.func = _func,					\
2739 		.debug = _debug,				\
2740 	}
2741 
2742 DEFINE_V4L_STUB_FUNC(g_fbuf)
2743 DEFINE_V4L_STUB_FUNC(s_fbuf)
2744 DEFINE_V4L_STUB_FUNC(expbuf)
2745 DEFINE_V4L_STUB_FUNC(g_std)
2746 DEFINE_V4L_STUB_FUNC(g_audio)
2747 DEFINE_V4L_STUB_FUNC(s_audio)
2748 DEFINE_V4L_STUB_FUNC(g_edid)
2749 DEFINE_V4L_STUB_FUNC(s_edid)
2750 DEFINE_V4L_STUB_FUNC(g_audout)
2751 DEFINE_V4L_STUB_FUNC(s_audout)
2752 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2753 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2754 DEFINE_V4L_STUB_FUNC(enumaudio)
2755 DEFINE_V4L_STUB_FUNC(enumaudout)
2756 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2757 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2758 DEFINE_V4L_STUB_FUNC(g_enc_index)
2759 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2760 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2761 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2762 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2763 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2764 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2765 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2766 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2767 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2768 
2769 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2770 	IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2771 	IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2772 	IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2773 	IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2774 	IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2775 	IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2776 	IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2777 	IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2778 	IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2779 	IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2780 	IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2781 	IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2782 	IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2783 	IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2784 	IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2785 	IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2786 	IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2787 	IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2788 	IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2789 	IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2790 	IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2791 	IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2792 	IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2793 	IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2794 	IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2795 	IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2796 	IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2797 	IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2798 	IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2799 	IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2800 	IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2801 	IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2802 	IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2803 	IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2804 	IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2805 	IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2806 	IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2807 	IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2808 	IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2809 	IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2810 	IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2811 	IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2812 	IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2813 	IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2814 	IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2815 	IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2816 	IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2817 	IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2818 	IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2819 	IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2820 	IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2821 	IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2822 	IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2823 	IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2824 	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)),
2825 	IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2826 	IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2827 	IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2828 	IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2829 	IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2830 	IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2831 	IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2832 	IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2833 	IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2834 	IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2835 	IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2836 	IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2837 	IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2838 	IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2839 	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)),
2840 	IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2841 	IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2842 	IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2843 	IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2844 	IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2845 	IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2846 	IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2847 	IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2848 	IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2849 	IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2850 	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)),
2851 	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)),
2852 };
2853 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2854 
2855 static bool v4l2_is_known_ioctl(unsigned int cmd)
2856 {
2857 	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2858 		return false;
2859 	return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2860 }
2861 
2862 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2863 					 struct v4l2_fh *vfh, unsigned int cmd,
2864 					 void *arg)
2865 {
2866 	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2867 		return vdev->lock;
2868 	if (vfh && vfh->m2m_ctx &&
2869 	    (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2870 		if (vfh->m2m_ctx->q_lock)
2871 			return vfh->m2m_ctx->q_lock;
2872 	}
2873 	if (vdev->queue && vdev->queue->lock &&
2874 			(v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2875 		return vdev->queue->lock;
2876 	return vdev->lock;
2877 }
2878 
2879 /* Common ioctl debug function. This function can be used by
2880    external ioctl messages as well as internal V4L ioctl */
2881 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2882 {
2883 	const char *dir, *type;
2884 
2885 	if (prefix)
2886 		printk(KERN_DEBUG "%s: ", prefix);
2887 
2888 	switch (_IOC_TYPE(cmd)) {
2889 	case 'd':
2890 		type = "v4l2_int";
2891 		break;
2892 	case 'V':
2893 		if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2894 			type = "v4l2";
2895 			break;
2896 		}
2897 		pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2898 		return;
2899 	default:
2900 		type = "unknown";
2901 		break;
2902 	}
2903 
2904 	switch (_IOC_DIR(cmd)) {
2905 	case _IOC_NONE:              dir = "--"; break;
2906 	case _IOC_READ:              dir = "r-"; break;
2907 	case _IOC_WRITE:             dir = "-w"; break;
2908 	case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2909 	default:                     dir = "*ERR*"; break;
2910 	}
2911 	pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2912 		type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2913 }
2914 EXPORT_SYMBOL(v4l_printk_ioctl);
2915 
2916 static long __video_do_ioctl(struct file *file,
2917 		unsigned int cmd, void *arg)
2918 {
2919 	struct video_device *vfd = video_devdata(file);
2920 	struct mutex *req_queue_lock = NULL;
2921 	struct mutex *lock; /* ioctl serialization mutex */
2922 	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2923 	bool write_only = false;
2924 	struct v4l2_ioctl_info default_info;
2925 	const struct v4l2_ioctl_info *info;
2926 	void *fh = file->private_data;
2927 	struct v4l2_fh *vfh = NULL;
2928 	int dev_debug = vfd->dev_debug;
2929 	long ret = -ENOTTY;
2930 
2931 	if (ops == NULL) {
2932 		pr_warn("%s: has no ioctl_ops.\n",
2933 				video_device_node_name(vfd));
2934 		return ret;
2935 	}
2936 
2937 	if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2938 		vfh = file->private_data;
2939 
2940 	/*
2941 	 * We need to serialize streamon/off with queueing new requests.
2942 	 * These ioctls may trigger the cancellation of a streaming
2943 	 * operation, and that should not be mixed with queueing a new
2944 	 * request at the same time.
2945 	 */
2946 	if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2947 	    (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2948 		req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2949 
2950 		if (mutex_lock_interruptible(req_queue_lock))
2951 			return -ERESTARTSYS;
2952 	}
2953 
2954 	lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2955 
2956 	if (lock && mutex_lock_interruptible(lock)) {
2957 		if (req_queue_lock)
2958 			mutex_unlock(req_queue_lock);
2959 		return -ERESTARTSYS;
2960 	}
2961 
2962 	if (!video_is_registered(vfd)) {
2963 		ret = -ENODEV;
2964 		goto unlock;
2965 	}
2966 
2967 	if (v4l2_is_known_ioctl(cmd)) {
2968 		info = &v4l2_ioctls[_IOC_NR(cmd)];
2969 
2970 		if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2971 		    !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2972 			goto done;
2973 
2974 		if (vfh && (info->flags & INFO_FL_PRIO)) {
2975 			ret = v4l2_prio_check(vfd->prio, vfh->prio);
2976 			if (ret)
2977 				goto done;
2978 		}
2979 	} else {
2980 		default_info.ioctl = cmd;
2981 		default_info.flags = 0;
2982 		default_info.debug = v4l_print_default;
2983 		info = &default_info;
2984 	}
2985 
2986 	write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2987 	if (info != &default_info) {
2988 		ret = info->func(ops, file, fh, arg);
2989 	} else if (!ops->vidioc_default) {
2990 		ret = -ENOTTY;
2991 	} else {
2992 		ret = ops->vidioc_default(file, fh,
2993 			vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2994 			cmd, arg);
2995 	}
2996 
2997 done:
2998 	if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2999 		if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3000 		    (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3001 			goto unlock;
3002 
3003 		v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3004 		if (ret < 0)
3005 			pr_cont(": error %ld", ret);
3006 		if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3007 			pr_cont("\n");
3008 		else if (_IOC_DIR(cmd) == _IOC_NONE)
3009 			info->debug(arg, write_only);
3010 		else {
3011 			pr_cont(": ");
3012 			info->debug(arg, write_only);
3013 		}
3014 	}
3015 
3016 unlock:
3017 	if (lock)
3018 		mutex_unlock(lock);
3019 	if (req_queue_lock)
3020 		mutex_unlock(req_queue_lock);
3021 	return ret;
3022 }
3023 
3024 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3025 			    void __user **user_ptr, void ***kernel_ptr)
3026 {
3027 	int ret = 0;
3028 
3029 	switch (cmd) {
3030 	case VIDIOC_PREPARE_BUF:
3031 	case VIDIOC_QUERYBUF:
3032 	case VIDIOC_QBUF:
3033 	case VIDIOC_DQBUF: {
3034 		struct v4l2_buffer *buf = parg;
3035 
3036 		if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3037 			if (buf->length > VIDEO_MAX_PLANES) {
3038 				ret = -EINVAL;
3039 				break;
3040 			}
3041 			*user_ptr = (void __user *)buf->m.planes;
3042 			*kernel_ptr = (void **)&buf->m.planes;
3043 			*array_size = sizeof(struct v4l2_plane) * buf->length;
3044 			ret = 1;
3045 		}
3046 		break;
3047 	}
3048 
3049 	case VIDIOC_G_EDID:
3050 	case VIDIOC_S_EDID: {
3051 		struct v4l2_edid *edid = parg;
3052 
3053 		if (edid->blocks) {
3054 			if (edid->blocks > 256) {
3055 				ret = -EINVAL;
3056 				break;
3057 			}
3058 			*user_ptr = (void __user *)edid->edid;
3059 			*kernel_ptr = (void **)&edid->edid;
3060 			*array_size = edid->blocks * 128;
3061 			ret = 1;
3062 		}
3063 		break;
3064 	}
3065 
3066 	case VIDIOC_S_EXT_CTRLS:
3067 	case VIDIOC_G_EXT_CTRLS:
3068 	case VIDIOC_TRY_EXT_CTRLS: {
3069 		struct v4l2_ext_controls *ctrls = parg;
3070 
3071 		if (ctrls->count != 0) {
3072 			if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3073 				ret = -EINVAL;
3074 				break;
3075 			}
3076 			*user_ptr = (void __user *)ctrls->controls;
3077 			*kernel_ptr = (void **)&ctrls->controls;
3078 			*array_size = sizeof(struct v4l2_ext_control)
3079 				    * ctrls->count;
3080 			ret = 1;
3081 		}
3082 		break;
3083 	}
3084 	case VIDIOC_G_FMT:
3085 	case VIDIOC_S_FMT:
3086 	case VIDIOC_TRY_FMT: {
3087 		struct v4l2_format *fmt = parg;
3088 
3089 		if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
3090 		    fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
3091 			break;
3092 		if (fmt->fmt.win.clipcount > 2048)
3093 			return -EINVAL;
3094 		if (!fmt->fmt.win.clipcount)
3095 			break;
3096 
3097 		*user_ptr = (void __user *)fmt->fmt.win.clips;
3098 		*kernel_ptr = (void **)&fmt->fmt.win.clips;
3099 		*array_size = sizeof(struct v4l2_clip)
3100 				* fmt->fmt.win.clipcount;
3101 
3102 		ret = 1;
3103 		break;
3104 	}
3105 	}
3106 
3107 	return ret;
3108 }
3109 
3110 static unsigned int video_translate_cmd(unsigned int cmd)
3111 {
3112 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3113 	switch (cmd) {
3114 	case VIDIOC_DQEVENT_TIME32:
3115 		return VIDIOC_DQEVENT;
3116 	case VIDIOC_QUERYBUF_TIME32:
3117 		return VIDIOC_QUERYBUF;
3118 	case VIDIOC_QBUF_TIME32:
3119 		return VIDIOC_QBUF;
3120 	case VIDIOC_DQBUF_TIME32:
3121 		return VIDIOC_DQBUF;
3122 	case VIDIOC_PREPARE_BUF_TIME32:
3123 		return VIDIOC_PREPARE_BUF;
3124 	}
3125 #endif
3126 	if (in_compat_syscall())
3127 		return v4l2_compat_translate_cmd(cmd);
3128 
3129 	return cmd;
3130 }
3131 
3132 static int video_get_user(void __user *arg, void *parg,
3133 			  unsigned int real_cmd, unsigned int cmd,
3134 			  bool *always_copy)
3135 {
3136 	unsigned int n = _IOC_SIZE(real_cmd);
3137 	int err = 0;
3138 
3139 	if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3140 		/* read-only ioctl */
3141 		memset(parg, 0, n);
3142 		return 0;
3143 	}
3144 
3145 	/*
3146 	 * In some cases, only a few fields are used as input,
3147 	 * i.e. when the app sets "index" and then the driver
3148 	 * fills in the rest of the structure for the thing
3149 	 * with that index.  We only need to copy up the first
3150 	 * non-input field.
3151 	 */
3152 	if (v4l2_is_known_ioctl(real_cmd)) {
3153 		u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3154 
3155 		if (flags & INFO_FL_CLEAR_MASK)
3156 			n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3157 		*always_copy = flags & INFO_FL_ALWAYS_COPY;
3158 	}
3159 
3160 	if (cmd == real_cmd) {
3161 		if (copy_from_user(parg, (void __user *)arg, n))
3162 			err = -EFAULT;
3163 	} else if (in_compat_syscall()) {
3164 		memset(parg, 0, n);
3165 		err = v4l2_compat_get_user(arg, parg, cmd);
3166 	} else {
3167 		memset(parg, 0, n);
3168 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3169 		switch (cmd) {
3170 		case VIDIOC_QUERYBUF_TIME32:
3171 		case VIDIOC_QBUF_TIME32:
3172 		case VIDIOC_DQBUF_TIME32:
3173 		case VIDIOC_PREPARE_BUF_TIME32: {
3174 			struct v4l2_buffer_time32 vb32;
3175 			struct v4l2_buffer *vb = parg;
3176 
3177 			if (copy_from_user(&vb32, arg, sizeof(vb32)))
3178 				return -EFAULT;
3179 
3180 			*vb = (struct v4l2_buffer) {
3181 				.index		= vb32.index,
3182 				.type		= vb32.type,
3183 				.bytesused	= vb32.bytesused,
3184 				.flags		= vb32.flags,
3185 				.field		= vb32.field,
3186 				.timestamp.tv_sec	= vb32.timestamp.tv_sec,
3187 				.timestamp.tv_usec	= vb32.timestamp.tv_usec,
3188 				.timecode	= vb32.timecode,
3189 				.sequence	= vb32.sequence,
3190 				.memory		= vb32.memory,
3191 				.m.userptr	= vb32.m.userptr,
3192 				.length		= vb32.length,
3193 				.request_fd	= vb32.request_fd,
3194 			};
3195 			break;
3196 		}
3197 		}
3198 #endif
3199 	}
3200 
3201 	/* zero out anything we don't copy from userspace */
3202 	if (!err && n < _IOC_SIZE(real_cmd))
3203 		memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3204 	return err;
3205 }
3206 
3207 static int video_put_user(void __user *arg, void *parg,
3208 			  unsigned int real_cmd, unsigned int cmd)
3209 {
3210 	if (!(_IOC_DIR(cmd) & _IOC_READ))
3211 		return 0;
3212 
3213 	if (cmd == real_cmd) {
3214 		/*  Copy results into user buffer  */
3215 		if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3216 			return -EFAULT;
3217 		return 0;
3218 	}
3219 
3220 	if (in_compat_syscall())
3221 		return v4l2_compat_put_user(arg, parg, cmd);
3222 
3223 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3224 	switch (cmd) {
3225 	case VIDIOC_DQEVENT_TIME32: {
3226 		struct v4l2_event *ev = parg;
3227 		struct v4l2_event_time32 ev32;
3228 
3229 		memset(&ev32, 0, sizeof(ev32));
3230 
3231 		ev32.type	= ev->type;
3232 		ev32.pending	= ev->pending;
3233 		ev32.sequence	= ev->sequence;
3234 		ev32.timestamp.tv_sec	= ev->timestamp.tv_sec;
3235 		ev32.timestamp.tv_nsec	= ev->timestamp.tv_nsec;
3236 		ev32.id		= ev->id;
3237 
3238 		memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3239 		memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3240 
3241 		if (copy_to_user(arg, &ev32, sizeof(ev32)))
3242 			return -EFAULT;
3243 		break;
3244 	}
3245 	case VIDIOC_QUERYBUF_TIME32:
3246 	case VIDIOC_QBUF_TIME32:
3247 	case VIDIOC_DQBUF_TIME32:
3248 	case VIDIOC_PREPARE_BUF_TIME32: {
3249 		struct v4l2_buffer *vb = parg;
3250 		struct v4l2_buffer_time32 vb32;
3251 
3252 		memset(&vb32, 0, sizeof(vb32));
3253 
3254 		vb32.index	= vb->index;
3255 		vb32.type	= vb->type;
3256 		vb32.bytesused	= vb->bytesused;
3257 		vb32.flags	= vb->flags;
3258 		vb32.field	= vb->field;
3259 		vb32.timestamp.tv_sec	= vb->timestamp.tv_sec;
3260 		vb32.timestamp.tv_usec	= vb->timestamp.tv_usec;
3261 		vb32.timecode	= vb->timecode;
3262 		vb32.sequence	= vb->sequence;
3263 		vb32.memory	= vb->memory;
3264 		vb32.m.userptr	= vb->m.userptr;
3265 		vb32.length	= vb->length;
3266 		vb32.request_fd	= vb->request_fd;
3267 
3268 		if (copy_to_user(arg, &vb32, sizeof(vb32)))
3269 			return -EFAULT;
3270 		break;
3271 	}
3272 	}
3273 #endif
3274 
3275 	return 0;
3276 }
3277 
3278 long
3279 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3280 	       v4l2_kioctl func)
3281 {
3282 	char	sbuf[128];
3283 	void    *mbuf = NULL, *array_buf = NULL;
3284 	void	*parg = (void *)arg;
3285 	long	err  = -EINVAL;
3286 	bool	has_array_args;
3287 	bool	always_copy = false;
3288 	size_t  array_size = 0;
3289 	void __user *user_ptr = NULL;
3290 	void	**kernel_ptr = NULL;
3291 	unsigned int cmd = video_translate_cmd(orig_cmd);
3292 	const size_t ioc_size = _IOC_SIZE(cmd);
3293 
3294 	/*  Copy arguments into temp kernel buffer  */
3295 	if (_IOC_DIR(cmd) != _IOC_NONE) {
3296 		if (ioc_size <= sizeof(sbuf)) {
3297 			parg = sbuf;
3298 		} else {
3299 			/* too big to allocate from stack */
3300 			mbuf = kmalloc(ioc_size, GFP_KERNEL);
3301 			if (NULL == mbuf)
3302 				return -ENOMEM;
3303 			parg = mbuf;
3304 		}
3305 
3306 		err = video_get_user((void __user *)arg, parg, cmd,
3307 				     orig_cmd, &always_copy);
3308 		if (err)
3309 			goto out;
3310 	}
3311 
3312 	err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3313 	if (err < 0)
3314 		goto out;
3315 	has_array_args = err;
3316 
3317 	if (has_array_args) {
3318 		array_buf = kvmalloc(array_size, GFP_KERNEL);
3319 		err = -ENOMEM;
3320 		if (array_buf == NULL)
3321 			goto out_array_args;
3322 		err = -EFAULT;
3323 		if (in_compat_syscall())
3324 			err = v4l2_compat_get_array_args(file, array_buf,
3325 							 user_ptr, array_size,
3326 							 orig_cmd, parg);
3327 		else
3328 			err = copy_from_user(array_buf, user_ptr, array_size) ?
3329 								-EFAULT : 0;
3330 		if (err)
3331 			goto out_array_args;
3332 		*kernel_ptr = array_buf;
3333 	}
3334 
3335 	/* Handles IOCTL */
3336 	err = func(file, cmd, parg);
3337 	if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3338 		err = -ENOTTY;
3339 		goto out;
3340 	}
3341 
3342 	if (err == 0) {
3343 		if (cmd == VIDIOC_DQBUF)
3344 			trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3345 		else if (cmd == VIDIOC_QBUF)
3346 			trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3347 	}
3348 
3349 	if (has_array_args) {
3350 		*kernel_ptr = (void __force *)user_ptr;
3351 		if (in_compat_syscall()) {
3352 			int put_err;
3353 
3354 			put_err = v4l2_compat_put_array_args(file, user_ptr,
3355 							     array_buf,
3356 							     array_size,
3357 							     orig_cmd, parg);
3358 			if (put_err)
3359 				err = put_err;
3360 		} else if (copy_to_user(user_ptr, array_buf, array_size)) {
3361 			err = -EFAULT;
3362 		}
3363 		goto out_array_args;
3364 	}
3365 	/*
3366 	 * Some ioctls can return an error, but still have valid
3367 	 * results that must be returned.
3368 	 */
3369 	if (err < 0 && !always_copy)
3370 		goto out;
3371 
3372 out_array_args:
3373 	if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3374 		err = -EFAULT;
3375 out:
3376 	kvfree(array_buf);
3377 	kfree(mbuf);
3378 	return err;
3379 }
3380 
3381 long video_ioctl2(struct file *file,
3382 	       unsigned int cmd, unsigned long arg)
3383 {
3384 	return video_usercopy(file, cmd, arg, __video_do_ioctl);
3385 }
3386 EXPORT_SYMBOL(video_ioctl2);
3387