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