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, width=%u, height=%u, bytesperline=%u\n",
347 &pixelformat, meta->buffersize, meta->width,
348 meta->height, meta->bytesperline);
349 break;
350 }
351 }
352
v4l_print_framebuffer(const void * arg,bool write_only)353 static void v4l_print_framebuffer(const void *arg, bool write_only)
354 {
355 const struct v4l2_framebuffer *p = arg;
356
357 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
358 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
359 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
360 p->fmt.colorspace);
361 }
362
v4l_print_buftype(const void * arg,bool write_only)363 static void v4l_print_buftype(const void *arg, bool write_only)
364 {
365 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
366 }
367
v4l_print_modulator(const void * arg,bool write_only)368 static void v4l_print_modulator(const void *arg, bool write_only)
369 {
370 const struct v4l2_modulator *p = arg;
371
372 if (write_only)
373 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
374 else
375 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
376 p->index, (int)sizeof(p->name), p->name, p->capability,
377 p->rangelow, p->rangehigh, p->txsubchans);
378 }
379
v4l_print_tuner(const void * arg,bool write_only)380 static void v4l_print_tuner(const void *arg, bool write_only)
381 {
382 const struct v4l2_tuner *p = arg;
383
384 if (write_only)
385 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
386 else
387 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",
388 p->index, (int)sizeof(p->name), p->name, p->type,
389 p->capability, p->rangelow,
390 p->rangehigh, p->signal, p->afc,
391 p->rxsubchans, p->audmode);
392 }
393
v4l_print_frequency(const void * arg,bool write_only)394 static void v4l_print_frequency(const void *arg, bool write_only)
395 {
396 const struct v4l2_frequency *p = arg;
397
398 pr_cont("tuner=%u, type=%u, frequency=%u\n",
399 p->tuner, p->type, p->frequency);
400 }
401
v4l_print_standard(const void * arg,bool write_only)402 static void v4l_print_standard(const void *arg, bool write_only)
403 {
404 const struct v4l2_standard *p = arg;
405
406 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
407 p->index,
408 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
409 p->frameperiod.numerator,
410 p->frameperiod.denominator,
411 p->framelines);
412 }
413
v4l_print_std(const void * arg,bool write_only)414 static void v4l_print_std(const void *arg, bool write_only)
415 {
416 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
417 }
418
v4l_print_hw_freq_seek(const void * arg,bool write_only)419 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
420 {
421 const struct v4l2_hw_freq_seek *p = arg;
422
423 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
424 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
425 p->rangelow, p->rangehigh);
426 }
427
v4l_print_requestbuffers(const void * arg,bool write_only)428 static void v4l_print_requestbuffers(const void *arg, bool write_only)
429 {
430 const struct v4l2_requestbuffers *p = arg;
431
432 pr_cont("count=%d, type=%s, memory=%s\n",
433 p->count,
434 prt_names(p->type, v4l2_type_names),
435 prt_names(p->memory, v4l2_memory_names));
436 }
437
v4l_print_buffer(const void * arg,bool write_only)438 static void v4l_print_buffer(const void *arg, bool write_only)
439 {
440 const struct v4l2_buffer *p = arg;
441 const struct v4l2_timecode *tc = &p->timecode;
442 const struct v4l2_plane *plane;
443 int i;
444
445 pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
446 (int)p->timestamp.tv_sec / 3600,
447 ((int)p->timestamp.tv_sec / 60) % 60,
448 ((int)p->timestamp.tv_sec % 60),
449 (long)p->timestamp.tv_usec,
450 p->index,
451 prt_names(p->type, v4l2_type_names), p->request_fd,
452 p->flags, prt_names(p->field, v4l2_field_names),
453 p->sequence, prt_names(p->memory, v4l2_memory_names));
454
455 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
456 pr_cont("\n");
457 for (i = 0; i < p->length; ++i) {
458 plane = &p->m.planes[i];
459 printk(KERN_DEBUG
460 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
461 i, plane->bytesused, plane->data_offset,
462 plane->m.userptr, plane->length);
463 }
464 } else {
465 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
466 p->bytesused, p->m.userptr, p->length);
467 }
468
469 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
470 tc->hours, tc->minutes, tc->seconds,
471 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
472 }
473
v4l_print_exportbuffer(const void * arg,bool write_only)474 static void v4l_print_exportbuffer(const void *arg, bool write_only)
475 {
476 const struct v4l2_exportbuffer *p = arg;
477
478 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
479 p->fd, prt_names(p->type, v4l2_type_names),
480 p->index, p->plane, p->flags);
481 }
482
v4l_print_create_buffers(const void * arg,bool write_only)483 static void v4l_print_create_buffers(const void *arg, bool write_only)
484 {
485 const struct v4l2_create_buffers *p = arg;
486
487 pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, max num buffers=%u, ",
488 p->index, p->count, prt_names(p->memory, v4l2_memory_names),
489 p->capabilities, p->max_num_buffers);
490 v4l_print_format(&p->format, write_only);
491 }
492
v4l_print_remove_buffers(const void * arg,bool write_only)493 static void v4l_print_remove_buffers(const void *arg, bool write_only)
494 {
495 const struct v4l2_remove_buffers *p = arg;
496
497 pr_cont("type=%s, index=%u, count=%u\n",
498 prt_names(p->type, v4l2_type_names), p->index, p->count);
499 }
500
v4l_print_streamparm(const void * arg,bool write_only)501 static void v4l_print_streamparm(const void *arg, bool write_only)
502 {
503 const struct v4l2_streamparm *p = arg;
504
505 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
506
507 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
508 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
509 const struct v4l2_captureparm *c = &p->parm.capture;
510
511 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
512 c->capability, c->capturemode,
513 c->timeperframe.numerator, c->timeperframe.denominator,
514 c->extendedmode, c->readbuffers);
515 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
516 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
517 const struct v4l2_outputparm *c = &p->parm.output;
518
519 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
520 c->capability, c->outputmode,
521 c->timeperframe.numerator, c->timeperframe.denominator,
522 c->extendedmode, c->writebuffers);
523 } else {
524 pr_cont("\n");
525 }
526 }
527
v4l_print_queryctrl(const void * arg,bool write_only)528 static void v4l_print_queryctrl(const void *arg, bool write_only)
529 {
530 const struct v4l2_queryctrl *p = arg;
531
532 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
533 p->id, p->type, (int)sizeof(p->name), p->name,
534 p->minimum, p->maximum,
535 p->step, p->default_value, p->flags);
536 }
537
v4l_print_query_ext_ctrl(const void * arg,bool write_only)538 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
539 {
540 const struct v4l2_query_ext_ctrl *p = arg;
541
542 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
543 p->id, p->type, (int)sizeof(p->name), p->name,
544 p->minimum, p->maximum,
545 p->step, p->default_value, p->flags,
546 p->elem_size, p->elems, p->nr_of_dims,
547 p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
548 }
549
v4l_print_querymenu(const void * arg,bool write_only)550 static void v4l_print_querymenu(const void *arg, bool write_only)
551 {
552 const struct v4l2_querymenu *p = arg;
553
554 pr_cont("id=0x%x, index=%d\n", p->id, p->index);
555 }
556
v4l_print_control(const void * arg,bool write_only)557 static void v4l_print_control(const void *arg, bool write_only)
558 {
559 const struct v4l2_control *p = arg;
560 const char *name = v4l2_ctrl_get_name(p->id);
561
562 if (name)
563 pr_cont("name=%s, ", name);
564 pr_cont("id=0x%x, value=%d\n", p->id, p->value);
565 }
566
v4l_print_ext_controls(const void * arg,bool write_only)567 static void v4l_print_ext_controls(const void *arg, bool write_only)
568 {
569 const struct v4l2_ext_controls *p = arg;
570 int i;
571
572 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
573 p->which, p->count, p->error_idx, p->request_fd);
574 for (i = 0; i < p->count; i++) {
575 unsigned int id = p->controls[i].id;
576 const char *name = v4l2_ctrl_get_name(id);
577
578 if (name)
579 pr_cont(", name=%s", name);
580 if (!p->controls[i].size)
581 pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
582 else
583 pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
584 }
585 pr_cont("\n");
586 }
587
v4l_print_cropcap(const void * arg,bool write_only)588 static void v4l_print_cropcap(const void *arg, bool write_only)
589 {
590 const struct v4l2_cropcap *p = arg;
591
592 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
593 prt_names(p->type, v4l2_type_names),
594 p->bounds.width, p->bounds.height,
595 p->bounds.left, p->bounds.top,
596 p->defrect.width, p->defrect.height,
597 p->defrect.left, p->defrect.top,
598 p->pixelaspect.numerator, p->pixelaspect.denominator);
599 }
600
v4l_print_crop(const void * arg,bool write_only)601 static void v4l_print_crop(const void *arg, bool write_only)
602 {
603 const struct v4l2_crop *p = arg;
604
605 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
606 prt_names(p->type, v4l2_type_names),
607 p->c.width, p->c.height,
608 p->c.left, p->c.top);
609 }
610
v4l_print_selection(const void * arg,bool write_only)611 static void v4l_print_selection(const void *arg, bool write_only)
612 {
613 const struct v4l2_selection *p = arg;
614
615 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
616 prt_names(p->type, v4l2_type_names),
617 p->target, p->flags,
618 p->r.width, p->r.height, p->r.left, p->r.top);
619 }
620
v4l_print_jpegcompression(const void * arg,bool write_only)621 static void v4l_print_jpegcompression(const void *arg, bool write_only)
622 {
623 const struct v4l2_jpegcompression *p = arg;
624
625 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
626 p->quality, p->APPn, p->APP_len,
627 p->COM_len, p->jpeg_markers);
628 }
629
v4l_print_enc_idx(const void * arg,bool write_only)630 static void v4l_print_enc_idx(const void *arg, bool write_only)
631 {
632 const struct v4l2_enc_idx *p = arg;
633
634 pr_cont("entries=%d, entries_cap=%d\n",
635 p->entries, p->entries_cap);
636 }
637
v4l_print_encoder_cmd(const void * arg,bool write_only)638 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
639 {
640 const struct v4l2_encoder_cmd *p = arg;
641
642 pr_cont("cmd=%d, flags=0x%x\n",
643 p->cmd, p->flags);
644 }
645
v4l_print_decoder_cmd(const void * arg,bool write_only)646 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
647 {
648 const struct v4l2_decoder_cmd *p = arg;
649
650 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
651
652 if (p->cmd == V4L2_DEC_CMD_START)
653 pr_info("speed=%d, format=%u\n",
654 p->start.speed, p->start.format);
655 else if (p->cmd == V4L2_DEC_CMD_STOP)
656 pr_info("pts=%llu\n", p->stop.pts);
657 }
658
v4l_print_dbg_chip_info(const void * arg,bool write_only)659 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
660 {
661 const struct v4l2_dbg_chip_info *p = arg;
662
663 pr_cont("type=%u, ", p->match.type);
664 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
665 pr_cont("name=%.*s, ",
666 (int)sizeof(p->match.name), p->match.name);
667 else
668 pr_cont("addr=%u, ", p->match.addr);
669 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
670 }
671
v4l_print_dbg_register(const void * arg,bool write_only)672 static void v4l_print_dbg_register(const void *arg, bool write_only)
673 {
674 const struct v4l2_dbg_register *p = arg;
675
676 pr_cont("type=%u, ", p->match.type);
677 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
678 pr_cont("name=%.*s, ",
679 (int)sizeof(p->match.name), p->match.name);
680 else
681 pr_cont("addr=%u, ", p->match.addr);
682 pr_cont("reg=0x%llx, val=0x%llx\n",
683 p->reg, p->val);
684 }
685
v4l_print_dv_timings(const void * arg,bool write_only)686 static void v4l_print_dv_timings(const void *arg, bool write_only)
687 {
688 const struct v4l2_dv_timings *p = arg;
689
690 switch (p->type) {
691 case V4L2_DV_BT_656_1120:
692 pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
693 p->bt.interlaced, p->bt.pixelclock,
694 p->bt.width, p->bt.height,
695 p->bt.polarities, p->bt.hfrontporch,
696 p->bt.hsync, p->bt.hbackporch,
697 p->bt.vfrontporch, p->bt.vsync,
698 p->bt.vbackporch, p->bt.il_vfrontporch,
699 p->bt.il_vsync, p->bt.il_vbackporch,
700 p->bt.standards, p->bt.flags);
701 break;
702 default:
703 pr_cont("type=%d\n", p->type);
704 break;
705 }
706 }
707
v4l_print_enum_dv_timings(const void * arg,bool write_only)708 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
709 {
710 const struct v4l2_enum_dv_timings *p = arg;
711
712 pr_cont("index=%u, ", p->index);
713 v4l_print_dv_timings(&p->timings, write_only);
714 }
715
v4l_print_dv_timings_cap(const void * arg,bool write_only)716 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
717 {
718 const struct v4l2_dv_timings_cap *p = arg;
719
720 switch (p->type) {
721 case V4L2_DV_BT_656_1120:
722 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
723 p->bt.min_width, p->bt.max_width,
724 p->bt.min_height, p->bt.max_height,
725 p->bt.min_pixelclock, p->bt.max_pixelclock,
726 p->bt.standards, p->bt.capabilities);
727 break;
728 default:
729 pr_cont("type=%u\n", p->type);
730 break;
731 }
732 }
733
v4l_print_frmsizeenum(const void * arg,bool write_only)734 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
735 {
736 const struct v4l2_frmsizeenum *p = arg;
737
738 pr_cont("index=%u, pixelformat=%p4cc, type=%u",
739 p->index, &p->pixel_format, p->type);
740 switch (p->type) {
741 case V4L2_FRMSIZE_TYPE_DISCRETE:
742 pr_cont(", wxh=%ux%u\n",
743 p->discrete.width, p->discrete.height);
744 break;
745 case V4L2_FRMSIZE_TYPE_STEPWISE:
746 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
747 p->stepwise.min_width,
748 p->stepwise.min_height,
749 p->stepwise.max_width,
750 p->stepwise.max_height,
751 p->stepwise.step_width,
752 p->stepwise.step_height);
753 break;
754 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
755 default:
756 pr_cont("\n");
757 break;
758 }
759 }
760
v4l_print_frmivalenum(const void * arg,bool write_only)761 static void v4l_print_frmivalenum(const void *arg, bool write_only)
762 {
763 const struct v4l2_frmivalenum *p = arg;
764
765 pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
766 p->index, &p->pixel_format, p->width, p->height, p->type);
767 switch (p->type) {
768 case V4L2_FRMIVAL_TYPE_DISCRETE:
769 pr_cont(", fps=%d/%d\n",
770 p->discrete.numerator,
771 p->discrete.denominator);
772 break;
773 case V4L2_FRMIVAL_TYPE_STEPWISE:
774 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
775 p->stepwise.min.numerator,
776 p->stepwise.min.denominator,
777 p->stepwise.max.numerator,
778 p->stepwise.max.denominator,
779 p->stepwise.step.numerator,
780 p->stepwise.step.denominator);
781 break;
782 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
783 default:
784 pr_cont("\n");
785 break;
786 }
787 }
788
v4l_print_event(const void * arg,bool write_only)789 static void v4l_print_event(const void *arg, bool write_only)
790 {
791 const struct v4l2_event *p = arg;
792 const struct v4l2_event_ctrl *c;
793
794 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
795 p->type, p->pending, p->sequence, p->id,
796 p->timestamp.tv_sec, p->timestamp.tv_nsec);
797 switch (p->type) {
798 case V4L2_EVENT_VSYNC:
799 printk(KERN_DEBUG "field=%s\n",
800 prt_names(p->u.vsync.field, v4l2_field_names));
801 break;
802 case V4L2_EVENT_CTRL:
803 c = &p->u.ctrl;
804 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
805 c->changes, c->type);
806 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
807 pr_cont("value64=%lld, ", c->value64);
808 else
809 pr_cont("value=%d, ", c->value);
810 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
811 c->flags, c->minimum, c->maximum,
812 c->step, c->default_value);
813 break;
814 case V4L2_EVENT_FRAME_SYNC:
815 pr_cont("frame_sequence=%u\n",
816 p->u.frame_sync.frame_sequence);
817 break;
818 }
819 }
820
v4l_print_event_subscription(const void * arg,bool write_only)821 static void v4l_print_event_subscription(const void *arg, bool write_only)
822 {
823 const struct v4l2_event_subscription *p = arg;
824
825 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
826 p->type, p->id, p->flags);
827 }
828
v4l_print_sliced_vbi_cap(const void * arg,bool write_only)829 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
830 {
831 const struct v4l2_sliced_vbi_cap *p = arg;
832 int i;
833
834 pr_cont("type=%s, service_set=0x%08x\n",
835 prt_names(p->type, v4l2_type_names), p->service_set);
836 for (i = 0; i < 24; i++)
837 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
838 p->service_lines[0][i],
839 p->service_lines[1][i]);
840 }
841
v4l_print_freq_band(const void * arg,bool write_only)842 static void v4l_print_freq_band(const void *arg, bool write_only)
843 {
844 const struct v4l2_frequency_band *p = arg;
845
846 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
847 p->tuner, p->type, p->index,
848 p->capability, p->rangelow,
849 p->rangehigh, p->modulation);
850 }
851
v4l_print_edid(const void * arg,bool write_only)852 static void v4l_print_edid(const void *arg, bool write_only)
853 {
854 const struct v4l2_edid *p = arg;
855
856 pr_cont("pad=%u, start_block=%u, blocks=%u\n",
857 p->pad, p->start_block, p->blocks);
858 }
859
v4l_print_u32(const void * arg,bool write_only)860 static void v4l_print_u32(const void *arg, bool write_only)
861 {
862 pr_cont("value=%u\n", *(const u32 *)arg);
863 }
864
v4l_print_newline(const void * arg,bool write_only)865 static void v4l_print_newline(const void *arg, bool write_only)
866 {
867 pr_cont("\n");
868 }
869
v4l_print_default(const void * arg,bool write_only)870 static void v4l_print_default(const void *arg, bool write_only)
871 {
872 pr_cont("driver-specific ioctl\n");
873 }
874
check_ext_ctrls(struct v4l2_ext_controls * c,unsigned long ioctl)875 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
876 {
877 __u32 i;
878
879 /* zero the reserved fields */
880 c->reserved[0] = 0;
881 for (i = 0; i < c->count; i++)
882 c->controls[i].reserved2[0] = 0;
883
884 switch (c->which) {
885 case V4L2_CID_PRIVATE_BASE:
886 /*
887 * V4L2_CID_PRIVATE_BASE cannot be used as control class
888 * when using extended controls.
889 * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
890 * is it allowed for backwards compatibility.
891 */
892 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
893 return false;
894 break;
895 case V4L2_CTRL_WHICH_DEF_VAL:
896 /* Default value cannot be changed */
897 if (ioctl == VIDIOC_S_EXT_CTRLS ||
898 ioctl == VIDIOC_TRY_EXT_CTRLS) {
899 c->error_idx = c->count;
900 return false;
901 }
902 return true;
903 case V4L2_CTRL_WHICH_CUR_VAL:
904 return true;
905 case V4L2_CTRL_WHICH_REQUEST_VAL:
906 c->error_idx = c->count;
907 return false;
908 }
909
910 /* Check that all controls are from the same control class. */
911 for (i = 0; i < c->count; i++) {
912 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
913 c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
914 c->count;
915 return false;
916 }
917 }
918 return true;
919 }
920
check_fmt(struct file * file,enum v4l2_buf_type type)921 static int check_fmt(struct file *file, enum v4l2_buf_type type)
922 {
923 const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
924 V4L2_CAP_VIDEO_CAPTURE_MPLANE |
925 V4L2_CAP_VIDEO_OUTPUT |
926 V4L2_CAP_VIDEO_OUTPUT_MPLANE |
927 V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
928 const u32 meta_caps = V4L2_CAP_META_CAPTURE |
929 V4L2_CAP_META_OUTPUT;
930 struct video_device *vfd = video_devdata(file);
931 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
932 bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
933 (vfd->device_caps & vid_caps);
934 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
935 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
936 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
937 bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
938 (vfd->device_caps & meta_caps);
939 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
940 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
941
942 if (ops == NULL)
943 return -EINVAL;
944
945 switch (type) {
946 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
947 if ((is_vid || is_tch) && is_rx &&
948 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
949 return 0;
950 break;
951 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
952 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
953 return 0;
954 break;
955 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
956 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
957 return 0;
958 break;
959 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
960 if (is_vid && is_tx &&
961 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
962 return 0;
963 break;
964 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
965 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
966 return 0;
967 break;
968 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
969 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
970 return 0;
971 break;
972 case V4L2_BUF_TYPE_VBI_CAPTURE:
973 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
974 return 0;
975 break;
976 case V4L2_BUF_TYPE_VBI_OUTPUT:
977 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
978 return 0;
979 break;
980 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
981 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
982 return 0;
983 break;
984 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
985 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
986 return 0;
987 break;
988 case V4L2_BUF_TYPE_SDR_CAPTURE:
989 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
990 return 0;
991 break;
992 case V4L2_BUF_TYPE_SDR_OUTPUT:
993 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
994 return 0;
995 break;
996 case V4L2_BUF_TYPE_META_CAPTURE:
997 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
998 return 0;
999 break;
1000 case V4L2_BUF_TYPE_META_OUTPUT:
1001 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
1002 return 0;
1003 break;
1004 default:
1005 break;
1006 }
1007 return -EINVAL;
1008 }
1009
v4l_sanitize_colorspace(u32 pixelformat,u32 * colorspace,u32 * encoding,u32 * quantization,u32 * xfer_func)1010 static void v4l_sanitize_colorspace(u32 pixelformat, u32 *colorspace,
1011 u32 *encoding, u32 *quantization,
1012 u32 *xfer_func)
1013 {
1014 bool is_hsv = pixelformat == V4L2_PIX_FMT_HSV24 ||
1015 pixelformat == V4L2_PIX_FMT_HSV32;
1016
1017 if (!v4l2_is_colorspace_valid(*colorspace)) {
1018 *colorspace = V4L2_COLORSPACE_DEFAULT;
1019 *encoding = V4L2_YCBCR_ENC_DEFAULT;
1020 *quantization = V4L2_QUANTIZATION_DEFAULT;
1021 *xfer_func = V4L2_XFER_FUNC_DEFAULT;
1022 }
1023
1024 if ((!is_hsv && !v4l2_is_ycbcr_enc_valid(*encoding)) ||
1025 (is_hsv && !v4l2_is_hsv_enc_valid(*encoding)))
1026 *encoding = V4L2_YCBCR_ENC_DEFAULT;
1027
1028 if (!v4l2_is_quant_valid(*quantization))
1029 *quantization = V4L2_QUANTIZATION_DEFAULT;
1030
1031 if (!v4l2_is_xfer_func_valid(*xfer_func))
1032 *xfer_func = V4L2_XFER_FUNC_DEFAULT;
1033 }
1034
v4l_sanitize_format(struct v4l2_format * fmt)1035 static void v4l_sanitize_format(struct v4l2_format *fmt)
1036 {
1037 unsigned int offset;
1038
1039 /* Make sure num_planes is not bogus */
1040 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1041 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1042 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1043 VIDEO_MAX_PLANES);
1044
1045 /*
1046 * The v4l2_pix_format structure has been extended with fields that were
1047 * not previously required to be set to zero by applications. The priv
1048 * field, when set to a magic value, indicates that the extended fields
1049 * are valid. Otherwise they will contain undefined values. To simplify
1050 * the API towards drivers zero the extended fields and set the priv
1051 * field to the magic value when the extended pixel format structure
1052 * isn't used by applications.
1053 */
1054 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1055 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1056 if (fmt->fmt.pix.priv != V4L2_PIX_FMT_PRIV_MAGIC) {
1057 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1058
1059 offset = offsetof(struct v4l2_pix_format, priv)
1060 + sizeof(fmt->fmt.pix.priv);
1061 memset(((void *)&fmt->fmt.pix) + offset, 0,
1062 sizeof(fmt->fmt.pix) - offset);
1063 }
1064 }
1065
1066 /* Replace invalid colorspace values with defaults. */
1067 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1068 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1069 v4l_sanitize_colorspace(fmt->fmt.pix.pixelformat,
1070 &fmt->fmt.pix.colorspace,
1071 &fmt->fmt.pix.ycbcr_enc,
1072 &fmt->fmt.pix.quantization,
1073 &fmt->fmt.pix.xfer_func);
1074 } else if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1075 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
1076 u32 ycbcr_enc = fmt->fmt.pix_mp.ycbcr_enc;
1077 u32 quantization = fmt->fmt.pix_mp.quantization;
1078 u32 xfer_func = fmt->fmt.pix_mp.xfer_func;
1079
1080 v4l_sanitize_colorspace(fmt->fmt.pix_mp.pixelformat,
1081 &fmt->fmt.pix_mp.colorspace, &ycbcr_enc,
1082 &quantization, &xfer_func);
1083
1084 fmt->fmt.pix_mp.ycbcr_enc = ycbcr_enc;
1085 fmt->fmt.pix_mp.quantization = quantization;
1086 fmt->fmt.pix_mp.xfer_func = xfer_func;
1087 }
1088 }
1089
v4l_querycap(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1090 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1091 struct file *file, void *fh, void *arg)
1092 {
1093 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1094 struct video_device *vfd = video_devdata(file);
1095 int ret;
1096
1097 cap->version = LINUX_VERSION_CODE;
1098 cap->device_caps = vfd->device_caps;
1099 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1100
1101 media_set_bus_info(cap->bus_info, sizeof(cap->bus_info),
1102 vfd->dev_parent);
1103
1104 ret = ops->vidioc_querycap(file, fh, cap);
1105
1106 /*
1107 * Drivers must not change device_caps, so check for this and
1108 * warn if this happened.
1109 */
1110 WARN_ON(cap->device_caps != vfd->device_caps);
1111 /*
1112 * Check that capabilities is a superset of
1113 * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1114 */
1115 WARN_ON((cap->capabilities &
1116 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1117 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1118 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1119 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1120
1121 return ret;
1122 }
1123
v4l_g_input(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1124 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1125 struct file *file, void *fh, void *arg)
1126 {
1127 struct video_device *vfd = video_devdata(file);
1128
1129 if (vfd->device_caps & V4L2_CAP_IO_MC) {
1130 *(int *)arg = 0;
1131 return 0;
1132 }
1133
1134 return ops->vidioc_g_input(file, fh, arg);
1135 }
1136
v4l_g_output(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1137 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1138 struct file *file, void *fh, void *arg)
1139 {
1140 struct video_device *vfd = video_devdata(file);
1141
1142 if (vfd->device_caps & V4L2_CAP_IO_MC) {
1143 *(int *)arg = 0;
1144 return 0;
1145 }
1146
1147 return ops->vidioc_g_output(file, fh, arg);
1148 }
1149
v4l_s_input(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1150 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1151 struct file *file, void *fh, void *arg)
1152 {
1153 struct video_device *vfd = video_devdata(file);
1154 int ret;
1155
1156 ret = v4l_enable_media_source(vfd);
1157 if (ret)
1158 return ret;
1159
1160 if (vfd->device_caps & V4L2_CAP_IO_MC)
1161 return *(int *)arg ? -EINVAL : 0;
1162
1163 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1164 }
1165
v4l_s_output(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1166 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1167 struct file *file, void *fh, void *arg)
1168 {
1169 struct video_device *vfd = video_devdata(file);
1170
1171 if (vfd->device_caps & V4L2_CAP_IO_MC)
1172 return *(int *)arg ? -EINVAL : 0;
1173
1174 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1175 }
1176
v4l_g_priority(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1177 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1178 struct file *file, void *fh, void *arg)
1179 {
1180 struct video_device *vfd;
1181 u32 *p = arg;
1182
1183 vfd = video_devdata(file);
1184 *p = v4l2_prio_max(vfd->prio);
1185 return 0;
1186 }
1187
v4l_s_priority(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1188 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1189 struct file *file, void *fh, void *arg)
1190 {
1191 struct video_device *vfd;
1192 struct v4l2_fh *vfh;
1193 u32 *p = arg;
1194
1195 vfd = video_devdata(file);
1196 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1197 return -ENOTTY;
1198 vfh = file->private_data;
1199 return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1200 }
1201
v4l_enuminput(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1202 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1203 struct file *file, void *fh, void *arg)
1204 {
1205 struct video_device *vfd = video_devdata(file);
1206 struct v4l2_input *p = arg;
1207
1208 /*
1209 * We set the flags for CAP_DV_TIMINGS &
1210 * CAP_STD here based on ioctl handler provided by the
1211 * driver. If the driver doesn't support these
1212 * for a specific input, it must override these flags.
1213 */
1214 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1215 p->capabilities |= V4L2_IN_CAP_STD;
1216
1217 if (vfd->device_caps & V4L2_CAP_IO_MC) {
1218 if (p->index)
1219 return -EINVAL;
1220 strscpy(p->name, vfd->name, sizeof(p->name));
1221 p->type = V4L2_INPUT_TYPE_CAMERA;
1222 return 0;
1223 }
1224
1225 return ops->vidioc_enum_input(file, fh, p);
1226 }
1227
v4l_enumoutput(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1228 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1229 struct file *file, void *fh, void *arg)
1230 {
1231 struct video_device *vfd = video_devdata(file);
1232 struct v4l2_output *p = arg;
1233
1234 /*
1235 * We set the flags for CAP_DV_TIMINGS &
1236 * CAP_STD here based on ioctl handler provided by the
1237 * driver. If the driver doesn't support these
1238 * for a specific output, it must override these flags.
1239 */
1240 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1241 p->capabilities |= V4L2_OUT_CAP_STD;
1242
1243 if (vfd->device_caps & V4L2_CAP_IO_MC) {
1244 if (p->index)
1245 return -EINVAL;
1246 strscpy(p->name, vfd->name, sizeof(p->name));
1247 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1248 return 0;
1249 }
1250
1251 return ops->vidioc_enum_output(file, fh, p);
1252 }
1253
v4l_fill_fmtdesc(struct v4l2_fmtdesc * fmt)1254 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1255 {
1256 const unsigned sz = sizeof(fmt->description);
1257 const char *descr = NULL;
1258 u32 flags = 0;
1259
1260 /*
1261 * We depart from the normal coding style here since the descriptions
1262 * should be aligned so it is easy to see which descriptions will be
1263 * longer than 31 characters (the max length for a description).
1264 * And frankly, this is easier to read anyway.
1265 *
1266 * Note that gcc will use O(log N) comparisons to find the right case.
1267 */
1268 switch (fmt->pixelformat) {
1269 /* Max description length mask: descr = "0123456789012345678901234567890" */
1270 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break;
1271 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break;
1272 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break;
1273 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break;
1274 case V4L2_PIX_FMT_RGBA444: descr = "16-bit RGBA 4-4-4-4"; break;
1275 case V4L2_PIX_FMT_RGBX444: descr = "16-bit RGBX 4-4-4-4"; break;
1276 case V4L2_PIX_FMT_ABGR444: descr = "16-bit ABGR 4-4-4-4"; break;
1277 case V4L2_PIX_FMT_XBGR444: descr = "16-bit XBGR 4-4-4-4"; break;
1278 case V4L2_PIX_FMT_BGRA444: descr = "16-bit BGRA 4-4-4-4"; break;
1279 case V4L2_PIX_FMT_BGRX444: descr = "16-bit BGRX 4-4-4-4"; break;
1280 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break;
1281 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break;
1282 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break;
1283 case V4L2_PIX_FMT_ABGR555: descr = "16-bit ABGR 1-5-5-5"; break;
1284 case V4L2_PIX_FMT_XBGR555: descr = "16-bit XBGR 1-5-5-5"; break;
1285 case V4L2_PIX_FMT_RGBA555: descr = "16-bit RGBA 5-5-5-1"; break;
1286 case V4L2_PIX_FMT_RGBX555: descr = "16-bit RGBX 5-5-5-1"; break;
1287 case V4L2_PIX_FMT_BGRA555: descr = "16-bit BGRA 5-5-5-1"; break;
1288 case V4L2_PIX_FMT_BGRX555: descr = "16-bit BGRX 5-5-5-1"; break;
1289 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break;
1290 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1291 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break;
1292 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break;
1293 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break;
1294 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break;
1295 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break;
1296 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break;
1297 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break;
1298 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break;
1299 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break;
1300 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break;
1301 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break;
1302 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break;
1303 case V4L2_PIX_FMT_BGRA32: descr = "32-bit ABGR 8-8-8-8"; break;
1304 case V4L2_PIX_FMT_BGRX32: descr = "32-bit XBGR 8-8-8-8"; break;
1305 case V4L2_PIX_FMT_RGBA32: descr = "32-bit RGBA 8-8-8-8"; break;
1306 case V4L2_PIX_FMT_RGBX32: descr = "32-bit RGBX 8-8-8-8"; break;
1307 case V4L2_PIX_FMT_RGBX1010102: descr = "32-bit RGBX 10-10-10-2"; break;
1308 case V4L2_PIX_FMT_RGBA1010102: descr = "32-bit RGBA 10-10-10-2"; break;
1309 case V4L2_PIX_FMT_ARGB2101010: descr = "32-bit ARGB 2-10-10-10"; break;
1310 case V4L2_PIX_FMT_BGR48: descr = "48-bit BGR 16-16-16"; break;
1311 case V4L2_PIX_FMT_RGB48: descr = "48-bit RGB 16-16-16"; break;
1312 case V4L2_PIX_FMT_BGR48_12: descr = "12-bit Depth BGR"; break;
1313 case V4L2_PIX_FMT_ABGR64_12: descr = "12-bit Depth BGRA"; break;
1314 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break;
1315 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break;
1316 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;
1317 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break;
1318 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break;
1319 case V4L2_PIX_FMT_Y012: descr = "12-bit Greyscale (bits 15-4)"; break;
1320 case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break;
1321 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break;
1322 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break;
1323 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
1324 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break;
1325 case V4L2_PIX_FMT_IPU3_Y10: descr = "10-bit greyscale (IPU3 Packed)"; break;
1326 case V4L2_PIX_FMT_Y12P: descr = "12-bit Greyscale (MIPI Packed)"; break;
1327 case V4L2_PIX_FMT_Y14P: descr = "14-bit Greyscale (MIPI Packed)"; break;
1328 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break;
1329 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break;
1330 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break;
1331 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break;
1332 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break;
1333 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break;
1334 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break;
1335 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break;
1336 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break;
1337 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break;
1338 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break;
1339 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break;
1340 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break;
1341 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break;
1342 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break;
1343 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break;
1344 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break;
1345 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break;
1346 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break;
1347 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break;
1348 case V4L2_PIX_FMT_YUV24: descr = "24-bit YUV 4:4:4 8-8-8"; break;
1349 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break;
1350 case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break;
1351 case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break;
1352 case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break;
1353 case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break;
1354 case V4L2_PIX_FMT_YUVA32: descr = "32-bit YUVA 8-8-8-8"; break;
1355 case V4L2_PIX_FMT_YUVX32: descr = "32-bit YUVX 8-8-8-8"; break;
1356 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break;
1357 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break;
1358 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break;
1359 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break;
1360 case V4L2_PIX_FMT_YUV48_12: descr = "12-bit YUV 4:4:4 Packed"; break;
1361 case V4L2_PIX_FMT_NV12: descr = "Y/UV 4:2:0"; break;
1362 case V4L2_PIX_FMT_NV21: descr = "Y/VU 4:2:0"; break;
1363 case V4L2_PIX_FMT_NV16: descr = "Y/UV 4:2:2"; break;
1364 case V4L2_PIX_FMT_NV61: descr = "Y/VU 4:2:2"; break;
1365 case V4L2_PIX_FMT_NV24: descr = "Y/UV 4:4:4"; break;
1366 case V4L2_PIX_FMT_NV42: descr = "Y/VU 4:4:4"; break;
1367 case V4L2_PIX_FMT_P010: descr = "10-bit Y/UV 4:2:0"; break;
1368 case V4L2_PIX_FMT_P012: descr = "12-bit Y/UV 4:2:0"; break;
1369 case V4L2_PIX_FMT_NV12_4L4: descr = "Y/UV 4:2:0 (4x4 Linear)"; break;
1370 case V4L2_PIX_FMT_NV12_16L16: descr = "Y/UV 4:2:0 (16x16 Linear)"; break;
1371 case V4L2_PIX_FMT_NV12_32L32: descr = "Y/UV 4:2:0 (32x32 Linear)"; break;
1372 case V4L2_PIX_FMT_NV15_4L4: descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
1373 case V4L2_PIX_FMT_P010_4L4: descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
1374 case V4L2_PIX_FMT_NV12M: descr = "Y/UV 4:2:0 (N-C)"; break;
1375 case V4L2_PIX_FMT_NV21M: descr = "Y/VU 4:2:0 (N-C)"; break;
1376 case V4L2_PIX_FMT_NV16M: descr = "Y/UV 4:2:2 (N-C)"; break;
1377 case V4L2_PIX_FMT_NV61M: descr = "Y/VU 4:2:2 (N-C)"; break;
1378 case V4L2_PIX_FMT_NV12MT: descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break;
1379 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break;
1380 case V4L2_PIX_FMT_P012M: descr = "12-bit Y/UV 4:2:0 (N-C)"; break;
1381 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break;
1382 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break;
1383 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break;
1384 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break;
1385 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break;
1386 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break;
1387 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break;
1388 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break;
1389 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break;
1390 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break;
1391 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break;
1392 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break;
1393 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break;
1394 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break;
1395 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1396 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1397 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1398 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1399 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1400 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1401 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1402 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1403 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1404 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1405 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1406 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1407 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1408 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1409 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1410 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1411 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break;
1412 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break;
1413 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break;
1414 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break;
1415 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1416 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1417 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1418 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1419 case V4L2_PIX_FMT_SBGGR14: descr = "14-bit Bayer BGBG/GRGR"; break;
1420 case V4L2_PIX_FMT_SGBRG14: descr = "14-bit Bayer GBGB/RGRG"; break;
1421 case V4L2_PIX_FMT_SGRBG14: descr = "14-bit Bayer GRGR/BGBG"; break;
1422 case V4L2_PIX_FMT_SRGGB14: descr = "14-bit Bayer RGRG/GBGB"; break;
1423 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1424 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1425 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1426 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1427 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break;
1428 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break;
1429 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break;
1430 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break;
1431 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1432 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break;
1433 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break;
1434 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break;
1435 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break;
1436 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break;
1437 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break;
1438 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break;
1439 case V4L2_PIX_FMT_MM21: descr = "Mediatek 8-bit Block Format"; break;
1440 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break;
1441 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break;
1442 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break;
1443 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break;
1444 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break;
1445 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break;
1446 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break;
1447 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break;
1448 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break;
1449 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break;
1450 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit Signed Deltas"; break;
1451 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit Signed Deltas"; break;
1452 case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break;
1453 case V4L2_TCH_FMT_TU08: descr = "8-bit Unsigned Touch Data"; break;
1454 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break;
1455 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break;
1456 case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break;
1457 case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break;
1458 case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break;
1459 case V4L2_META_FMT_RK_ISP1_PARAMS: descr = "Rockchip ISP1 3A Parameters"; break;
1460 case V4L2_META_FMT_RK_ISP1_STAT_3A: descr = "Rockchip ISP1 3A Statistics"; break;
1461 case V4L2_META_FMT_RK_ISP1_EXT_PARAMS: descr = "Rockchip ISP1 Ext 3A Params"; break;
1462 case V4L2_PIX_FMT_NV12_8L128: descr = "NV12 (8x128 Linear)"; break;
1463 case V4L2_PIX_FMT_NV12M_8L128: descr = "NV12M (8x128 Linear)"; break;
1464 case V4L2_PIX_FMT_NV12_10BE_8L128: descr = "10-bit NV12 (8x128 Linear, BE)"; break;
1465 case V4L2_PIX_FMT_NV12M_10BE_8L128: descr = "10-bit NV12M (8x128 Linear, BE)"; break;
1466 case V4L2_PIX_FMT_Y210: descr = "10-bit YUYV Packed"; break;
1467 case V4L2_PIX_FMT_Y212: descr = "12-bit YUYV Packed"; break;
1468 case V4L2_PIX_FMT_Y216: descr = "16-bit YUYV Packed"; break;
1469 case V4L2_META_FMT_RPI_BE_CFG: descr = "RPi PiSP BE Config format"; break;
1470 case V4L2_META_FMT_GENERIC_8: descr = "8-bit Generic Metadata"; break;
1471 case V4L2_META_FMT_GENERIC_CSI2_10: descr = "8-bit Generic Meta, 10b CSI-2"; break;
1472 case V4L2_META_FMT_GENERIC_CSI2_12: descr = "8-bit Generic Meta, 12b CSI-2"; break;
1473 case V4L2_META_FMT_GENERIC_CSI2_14: descr = "8-bit Generic Meta, 14b CSI-2"; break;
1474 case V4L2_META_FMT_GENERIC_CSI2_16: descr = "8-bit Generic Meta, 16b CSI-2"; break;
1475 case V4L2_META_FMT_GENERIC_CSI2_20: descr = "8-bit Generic Meta, 20b CSI-2"; break;
1476 case V4L2_META_FMT_GENERIC_CSI2_24: descr = "8-bit Generic Meta, 24b CSI-2"; break;
1477
1478 default:
1479 /* Compressed formats */
1480 flags = V4L2_FMT_FLAG_COMPRESSED;
1481 switch (fmt->pixelformat) {
1482 /* Max description length mask: descr = "0123456789012345678901234567890" */
1483 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break;
1484 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break;
1485 case V4L2_PIX_FMT_DV: descr = "1394"; break;
1486 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break;
1487 case V4L2_PIX_FMT_H264: descr = "H.264"; break;
1488 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break;
1489 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break;
1490 case V4L2_PIX_FMT_H264_SLICE: descr = "H.264 Parsed Slice Data"; break;
1491 case V4L2_PIX_FMT_H263: descr = "H.263"; break;
1492 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break;
1493 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break;
1494 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break;
1495 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 Part 2 ES"; break;
1496 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break;
1497 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break;
1498 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break;
1499 case V4L2_PIX_FMT_VP8: descr = "VP8"; break;
1500 case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break;
1501 case V4L2_PIX_FMT_VP9: descr = "VP9"; break;
1502 case V4L2_PIX_FMT_VP9_FRAME: descr = "VP9 Frame"; break;
1503 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */
1504 case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break;
1505 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */
1506 case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */
1507 case V4L2_PIX_FMT_SPK: descr = "Sorenson Spark"; break;
1508 case V4L2_PIX_FMT_RV30: descr = "RealVideo 8"; break;
1509 case V4L2_PIX_FMT_RV40: descr = "RealVideo 9 & 10"; break;
1510 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break;
1511 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break;
1512 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break;
1513 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break;
1514 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break;
1515 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break;
1516 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break;
1517 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break;
1518 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break;
1519 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break;
1520 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break;
1521 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break;
1522 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break;
1523 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break;
1524 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break;
1525 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break;
1526 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break;
1527 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1528 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break;
1529 case V4L2_PIX_FMT_QC08C: descr = "QCOM Compressed 8-bit Format"; break;
1530 case V4L2_PIX_FMT_QC10C: descr = "QCOM Compressed 10-bit Format"; break;
1531 case V4L2_PIX_FMT_AJPG: descr = "Aspeed JPEG"; break;
1532 case V4L2_PIX_FMT_AV1_FRAME: descr = "AV1 Frame"; break;
1533 case V4L2_PIX_FMT_MT2110T: descr = "Mediatek 10bit Tile Mode"; break;
1534 case V4L2_PIX_FMT_MT2110R: descr = "Mediatek 10bit Raster Mode"; break;
1535 case V4L2_PIX_FMT_HEXTILE: descr = "Hextile Compressed Format"; break;
1536 case V4L2_PIX_FMT_PISP_COMP1_RGGB: descr = "PiSP 8b RGRG/GBGB mode1 compr"; break;
1537 case V4L2_PIX_FMT_PISP_COMP1_GRBG: descr = "PiSP 8b GRGR/BGBG mode1 compr"; break;
1538 case V4L2_PIX_FMT_PISP_COMP1_GBRG: descr = "PiSP 8b GBGB/RGRG mode1 compr"; break;
1539 case V4L2_PIX_FMT_PISP_COMP1_BGGR: descr = "PiSP 8b BGBG/GRGR mode1 compr"; break;
1540 case V4L2_PIX_FMT_PISP_COMP1_MONO: descr = "PiSP 8b monochrome mode1 compr"; break;
1541 case V4L2_PIX_FMT_PISP_COMP2_RGGB: descr = "PiSP 8b RGRG/GBGB mode2 compr"; break;
1542 case V4L2_PIX_FMT_PISP_COMP2_GRBG: descr = "PiSP 8b GRGR/BGBG mode2 compr"; break;
1543 case V4L2_PIX_FMT_PISP_COMP2_GBRG: descr = "PiSP 8b GBGB/RGRG mode2 compr"; break;
1544 case V4L2_PIX_FMT_PISP_COMP2_BGGR: descr = "PiSP 8b BGBG/GRGR mode2 compr"; break;
1545 case V4L2_PIX_FMT_PISP_COMP2_MONO: descr = "PiSP 8b monochrome mode2 compr"; break;
1546 default:
1547 if (fmt->description[0])
1548 return;
1549 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1550 flags = 0;
1551 snprintf(fmt->description, sz, "%p4cc",
1552 &fmt->pixelformat);
1553 break;
1554 }
1555 }
1556
1557 if (fmt->type == V4L2_BUF_TYPE_META_CAPTURE) {
1558 switch (fmt->pixelformat) {
1559 case V4L2_META_FMT_GENERIC_8:
1560 case V4L2_META_FMT_GENERIC_CSI2_10:
1561 case V4L2_META_FMT_GENERIC_CSI2_12:
1562 case V4L2_META_FMT_GENERIC_CSI2_14:
1563 case V4L2_META_FMT_GENERIC_CSI2_16:
1564 case V4L2_META_FMT_GENERIC_CSI2_20:
1565 case V4L2_META_FMT_GENERIC_CSI2_24:
1566 fmt->flags |= V4L2_FMT_FLAG_META_LINE_BASED;
1567 break;
1568 default:
1569 fmt->flags &= ~V4L2_FMT_FLAG_META_LINE_BASED;
1570 }
1571 }
1572
1573 if (descr)
1574 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1575 fmt->flags |= flags;
1576 }
1577
v4l_enum_fmt(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1578 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1579 struct file *file, void *fh, void *arg)
1580 {
1581 struct video_device *vdev = video_devdata(file);
1582 struct v4l2_fmtdesc *p = arg;
1583 int ret = check_fmt(file, p->type);
1584 u32 mbus_code;
1585 u32 cap_mask;
1586
1587 if (ret)
1588 return ret;
1589 ret = -EINVAL;
1590
1591 if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1592 p->mbus_code = 0;
1593
1594 mbus_code = p->mbus_code;
1595 memset_after(p, 0, type);
1596 p->mbus_code = mbus_code;
1597
1598 switch (p->type) {
1599 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1600 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1601 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1602 V4L2_CAP_VIDEO_M2M_MPLANE;
1603 if (!!(vdev->device_caps & cap_mask) !=
1604 (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1605 break;
1606
1607 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1608 break;
1609 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1610 break;
1611 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1612 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1613 break;
1614 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1615 break;
1616 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1617 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1618 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1619 V4L2_CAP_VIDEO_M2M_MPLANE;
1620 if (!!(vdev->device_caps & cap_mask) !=
1621 (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1622 break;
1623
1624 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1625 break;
1626 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1627 break;
1628 case V4L2_BUF_TYPE_SDR_CAPTURE:
1629 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1630 break;
1631 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1632 break;
1633 case V4L2_BUF_TYPE_SDR_OUTPUT:
1634 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1635 break;
1636 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1637 break;
1638 case V4L2_BUF_TYPE_META_CAPTURE:
1639 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1640 break;
1641 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1642 break;
1643 case V4L2_BUF_TYPE_META_OUTPUT:
1644 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1645 break;
1646 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1647 break;
1648 }
1649 if (ret == 0)
1650 v4l_fill_fmtdesc(p);
1651 return ret;
1652 }
1653
v4l_pix_format_touch(struct v4l2_pix_format * p)1654 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1655 {
1656 /*
1657 * The v4l2_pix_format structure contains fields that make no sense for
1658 * touch. Set them to default values in this case.
1659 */
1660
1661 p->field = V4L2_FIELD_NONE;
1662 p->colorspace = V4L2_COLORSPACE_RAW;
1663 p->flags = 0;
1664 p->ycbcr_enc = 0;
1665 p->quantization = 0;
1666 p->xfer_func = 0;
1667 }
1668
v4l_g_fmt(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1669 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1670 struct file *file, void *fh, void *arg)
1671 {
1672 struct v4l2_format *p = arg;
1673 struct video_device *vfd = video_devdata(file);
1674 int ret = check_fmt(file, p->type);
1675
1676 if (ret)
1677 return ret;
1678
1679 memset(&p->fmt, 0, sizeof(p->fmt));
1680
1681 switch (p->type) {
1682 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1683 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1684 break;
1685 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1686 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1687 /* just in case the driver zeroed it again */
1688 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1689 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1690 v4l_pix_format_touch(&p->fmt.pix);
1691 return ret;
1692 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1693 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1694 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1695 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1696 case V4L2_BUF_TYPE_VBI_CAPTURE:
1697 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1698 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1699 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1700 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1701 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1702 break;
1703 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1704 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1705 /* just in case the driver zeroed it again */
1706 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1707 return ret;
1708 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1709 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1710 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1711 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1712 case V4L2_BUF_TYPE_VBI_OUTPUT:
1713 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1714 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1715 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1716 case V4L2_BUF_TYPE_SDR_CAPTURE:
1717 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1718 case V4L2_BUF_TYPE_SDR_OUTPUT:
1719 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1720 case V4L2_BUF_TYPE_META_CAPTURE:
1721 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1722 case V4L2_BUF_TYPE_META_OUTPUT:
1723 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1724 }
1725 return -EINVAL;
1726 }
1727
v4l_s_fmt(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1728 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1729 struct file *file, void *fh, void *arg)
1730 {
1731 struct v4l2_format *p = arg;
1732 struct video_device *vfd = video_devdata(file);
1733 int ret = check_fmt(file, p->type);
1734 unsigned int i;
1735
1736 if (ret)
1737 return ret;
1738
1739 ret = v4l_enable_media_source(vfd);
1740 if (ret)
1741 return ret;
1742 v4l_sanitize_format(p);
1743
1744 switch (p->type) {
1745 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1746 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1747 break;
1748 memset_after(p, 0, fmt.pix);
1749 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1750 /* just in case the driver zeroed it again */
1751 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1752 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1753 v4l_pix_format_touch(&p->fmt.pix);
1754 return ret;
1755 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1756 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1757 break;
1758 memset_after(p, 0, fmt.pix_mp.xfer_func);
1759 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1760 memset_after(&p->fmt.pix_mp.plane_fmt[i],
1761 0, bytesperline);
1762 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1763 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1764 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1765 break;
1766 memset_after(p, 0, fmt.win);
1767 p->fmt.win.clips = NULL;
1768 p->fmt.win.clipcount = 0;
1769 p->fmt.win.bitmap = NULL;
1770 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1771 case V4L2_BUF_TYPE_VBI_CAPTURE:
1772 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1773 break;
1774 memset_after(p, 0, fmt.vbi.flags);
1775 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1776 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1777 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1778 break;
1779 memset_after(p, 0, fmt.sliced.io_size);
1780 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1781 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1782 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1783 break;
1784 memset_after(p, 0, fmt.pix);
1785 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1786 /* just in case the driver zeroed it again */
1787 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1788 return ret;
1789 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1790 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1791 break;
1792 memset_after(p, 0, fmt.pix_mp.xfer_func);
1793 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1794 memset_after(&p->fmt.pix_mp.plane_fmt[i],
1795 0, bytesperline);
1796 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1797 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1798 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1799 break;
1800 memset_after(p, 0, fmt.win);
1801 p->fmt.win.clips = NULL;
1802 p->fmt.win.clipcount = 0;
1803 p->fmt.win.bitmap = NULL;
1804 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1805 case V4L2_BUF_TYPE_VBI_OUTPUT:
1806 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1807 break;
1808 memset_after(p, 0, fmt.vbi.flags);
1809 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1810 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1811 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1812 break;
1813 memset_after(p, 0, fmt.sliced.io_size);
1814 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1815 case V4L2_BUF_TYPE_SDR_CAPTURE:
1816 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1817 break;
1818 memset_after(p, 0, fmt.sdr.buffersize);
1819 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1820 case V4L2_BUF_TYPE_SDR_OUTPUT:
1821 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1822 break;
1823 memset_after(p, 0, fmt.sdr.buffersize);
1824 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1825 case V4L2_BUF_TYPE_META_CAPTURE:
1826 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1827 break;
1828 memset_after(p, 0, fmt.meta);
1829 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1830 case V4L2_BUF_TYPE_META_OUTPUT:
1831 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1832 break;
1833 memset_after(p, 0, fmt.meta);
1834 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1835 }
1836 return -EINVAL;
1837 }
1838
v4l_try_fmt(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1839 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1840 struct file *file, void *fh, void *arg)
1841 {
1842 struct v4l2_format *p = arg;
1843 struct video_device *vfd = video_devdata(file);
1844 int ret = check_fmt(file, p->type);
1845 unsigned int i;
1846
1847 if (ret)
1848 return ret;
1849
1850 v4l_sanitize_format(p);
1851
1852 switch (p->type) {
1853 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1854 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1855 break;
1856 memset_after(p, 0, fmt.pix);
1857 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1858 /* just in case the driver zeroed it again */
1859 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1860 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1861 v4l_pix_format_touch(&p->fmt.pix);
1862 return ret;
1863 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1864 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1865 break;
1866 memset_after(p, 0, fmt.pix_mp.xfer_func);
1867 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1868 memset_after(&p->fmt.pix_mp.plane_fmt[i],
1869 0, bytesperline);
1870 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1871 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1872 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1873 break;
1874 memset_after(p, 0, fmt.win);
1875 p->fmt.win.clips = NULL;
1876 p->fmt.win.clipcount = 0;
1877 p->fmt.win.bitmap = NULL;
1878 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1879 case V4L2_BUF_TYPE_VBI_CAPTURE:
1880 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1881 break;
1882 memset_after(p, 0, fmt.vbi.flags);
1883 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1884 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1885 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1886 break;
1887 memset_after(p, 0, fmt.sliced.io_size);
1888 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1889 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1890 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1891 break;
1892 memset_after(p, 0, fmt.pix);
1893 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1894 /* just in case the driver zeroed it again */
1895 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1896 return ret;
1897 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1898 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1899 break;
1900 memset_after(p, 0, fmt.pix_mp.xfer_func);
1901 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1902 memset_after(&p->fmt.pix_mp.plane_fmt[i],
1903 0, bytesperline);
1904 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1905 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1906 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1907 break;
1908 memset_after(p, 0, fmt.win);
1909 p->fmt.win.clips = NULL;
1910 p->fmt.win.clipcount = 0;
1911 p->fmt.win.bitmap = NULL;
1912 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1913 case V4L2_BUF_TYPE_VBI_OUTPUT:
1914 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1915 break;
1916 memset_after(p, 0, fmt.vbi.flags);
1917 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1918 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1919 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1920 break;
1921 memset_after(p, 0, fmt.sliced.io_size);
1922 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1923 case V4L2_BUF_TYPE_SDR_CAPTURE:
1924 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1925 break;
1926 memset_after(p, 0, fmt.sdr.buffersize);
1927 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1928 case V4L2_BUF_TYPE_SDR_OUTPUT:
1929 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1930 break;
1931 memset_after(p, 0, fmt.sdr.buffersize);
1932 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1933 case V4L2_BUF_TYPE_META_CAPTURE:
1934 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1935 break;
1936 memset_after(p, 0, fmt.meta);
1937 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1938 case V4L2_BUF_TYPE_META_OUTPUT:
1939 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1940 break;
1941 memset_after(p, 0, fmt.meta);
1942 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1943 }
1944 return -EINVAL;
1945 }
1946
v4l_streamon(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1947 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1948 struct file *file, void *fh, void *arg)
1949 {
1950 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1951 }
1952
v4l_streamoff(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1953 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1954 struct file *file, void *fh, void *arg)
1955 {
1956 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1957 }
1958
v4l_g_tuner(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1959 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1960 struct file *file, void *fh, void *arg)
1961 {
1962 struct video_device *vfd = video_devdata(file);
1963 struct v4l2_tuner *p = arg;
1964 int err;
1965
1966 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1967 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1968 err = ops->vidioc_g_tuner(file, fh, p);
1969 if (!err)
1970 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1971 return err;
1972 }
1973
v4l_s_tuner(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1974 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1975 struct file *file, void *fh, void *arg)
1976 {
1977 struct video_device *vfd = video_devdata(file);
1978 struct v4l2_tuner *p = arg;
1979 int ret;
1980
1981 ret = v4l_enable_media_source(vfd);
1982 if (ret)
1983 return ret;
1984 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1985 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1986 return ops->vidioc_s_tuner(file, fh, p);
1987 }
1988
v4l_g_modulator(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1989 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1990 struct file *file, void *fh, void *arg)
1991 {
1992 struct video_device *vfd = video_devdata(file);
1993 struct v4l2_modulator *p = arg;
1994 int err;
1995
1996 if (vfd->vfl_type == VFL_TYPE_RADIO)
1997 p->type = V4L2_TUNER_RADIO;
1998
1999 err = ops->vidioc_g_modulator(file, fh, p);
2000 if (!err)
2001 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
2002 return err;
2003 }
2004
v4l_s_modulator(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2005 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
2006 struct file *file, void *fh, void *arg)
2007 {
2008 struct video_device *vfd = video_devdata(file);
2009 struct v4l2_modulator *p = arg;
2010
2011 if (vfd->vfl_type == VFL_TYPE_RADIO)
2012 p->type = V4L2_TUNER_RADIO;
2013
2014 return ops->vidioc_s_modulator(file, fh, p);
2015 }
2016
v4l_g_frequency(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2017 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
2018 struct file *file, void *fh, void *arg)
2019 {
2020 struct video_device *vfd = video_devdata(file);
2021 struct v4l2_frequency *p = arg;
2022
2023 if (vfd->vfl_type == VFL_TYPE_SDR)
2024 p->type = V4L2_TUNER_SDR;
2025 else
2026 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2027 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2028 return ops->vidioc_g_frequency(file, fh, p);
2029 }
2030
v4l_s_frequency(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2031 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
2032 struct file *file, void *fh, void *arg)
2033 {
2034 struct video_device *vfd = video_devdata(file);
2035 const struct v4l2_frequency *p = arg;
2036 enum v4l2_tuner_type type;
2037 int ret;
2038
2039 ret = v4l_enable_media_source(vfd);
2040 if (ret)
2041 return ret;
2042 if (vfd->vfl_type == VFL_TYPE_SDR) {
2043 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2044 return -EINVAL;
2045 } else {
2046 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2047 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2048 if (type != p->type)
2049 return -EINVAL;
2050 }
2051 return ops->vidioc_s_frequency(file, fh, p);
2052 }
2053
v4l_enumstd(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2054 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
2055 struct file *file, void *fh, void *arg)
2056 {
2057 struct video_device *vfd = video_devdata(file);
2058 struct v4l2_standard *p = arg;
2059
2060 return v4l_video_std_enumstd(p, vfd->tvnorms);
2061 }
2062
v4l_s_std(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2063 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
2064 struct file *file, void *fh, void *arg)
2065 {
2066 struct video_device *vfd = video_devdata(file);
2067 v4l2_std_id id = *(v4l2_std_id *)arg, norm;
2068 int ret;
2069
2070 ret = v4l_enable_media_source(vfd);
2071 if (ret)
2072 return ret;
2073 norm = id & vfd->tvnorms;
2074 if (vfd->tvnorms && !norm) /* Check if std is supported */
2075 return -EINVAL;
2076
2077 /* Calls the specific handler */
2078 return ops->vidioc_s_std(file, fh, norm);
2079 }
2080
v4l_querystd(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2081 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
2082 struct file *file, void *fh, void *arg)
2083 {
2084 struct video_device *vfd = video_devdata(file);
2085 v4l2_std_id *p = arg;
2086 int ret;
2087
2088 ret = v4l_enable_media_source(vfd);
2089 if (ret)
2090 return ret;
2091 /*
2092 * If no signal is detected, then the driver should return
2093 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
2094 * any standards that do not apply removed.
2095 *
2096 * This means that tuners, audio and video decoders can join
2097 * their efforts to improve the standards detection.
2098 */
2099 *p = vfd->tvnorms;
2100 return ops->vidioc_querystd(file, fh, arg);
2101 }
2102
v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2103 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2104 struct file *file, void *fh, void *arg)
2105 {
2106 struct video_device *vfd = video_devdata(file);
2107 struct v4l2_hw_freq_seek *p = arg;
2108 enum v4l2_tuner_type type;
2109 int ret;
2110
2111 ret = v4l_enable_media_source(vfd);
2112 if (ret)
2113 return ret;
2114 /* s_hw_freq_seek is not supported for SDR for now */
2115 if (vfd->vfl_type == VFL_TYPE_SDR)
2116 return -EINVAL;
2117
2118 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2119 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2120 if (p->type != type)
2121 return -EINVAL;
2122 return ops->vidioc_s_hw_freq_seek(file, fh, p);
2123 }
2124
v4l_s_fbuf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2125 static int v4l_s_fbuf(const struct v4l2_ioctl_ops *ops,
2126 struct file *file, void *fh, void *arg)
2127 {
2128 struct v4l2_framebuffer *p = arg;
2129
2130 p->base = NULL;
2131 return ops->vidioc_s_fbuf(file, fh, p);
2132 }
2133
v4l_overlay(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2134 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2135 struct file *file, void *fh, void *arg)
2136 {
2137 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2138 }
2139
v4l_reqbufs(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2140 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2141 struct file *file, void *fh, void *arg)
2142 {
2143 struct video_device *vfd = video_devdata(file);
2144 struct v4l2_requestbuffers *p = arg;
2145 int ret = check_fmt(file, p->type);
2146
2147 if (ret)
2148 return ret;
2149
2150 memset_after(p, 0, flags);
2151
2152 p->capabilities = 0;
2153 if (is_valid_ioctl(vfd, VIDIOC_REMOVE_BUFS))
2154 p->capabilities = V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS;
2155
2156 return ops->vidioc_reqbufs(file, fh, p);
2157 }
2158
v4l_querybuf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2159 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2160 struct file *file, void *fh, void *arg)
2161 {
2162 struct v4l2_buffer *p = arg;
2163 int ret = check_fmt(file, p->type);
2164
2165 return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2166 }
2167
v4l_qbuf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2168 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2169 struct file *file, void *fh, void *arg)
2170 {
2171 struct v4l2_buffer *p = arg;
2172 int ret = check_fmt(file, p->type);
2173
2174 return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2175 }
2176
v4l_dqbuf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2177 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2178 struct file *file, void *fh, void *arg)
2179 {
2180 struct v4l2_buffer *p = arg;
2181 int ret = check_fmt(file, p->type);
2182
2183 return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2184 }
2185
v4l_create_bufs(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2186 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2187 struct file *file, void *fh, void *arg)
2188 {
2189 struct video_device *vfd = video_devdata(file);
2190 struct v4l2_create_buffers *create = arg;
2191 int ret = check_fmt(file, create->format.type);
2192
2193 if (ret)
2194 return ret;
2195
2196 memset_after(create, 0, flags);
2197
2198 v4l_sanitize_format(&create->format);
2199
2200 create->capabilities = 0;
2201 if (is_valid_ioctl(vfd, VIDIOC_REMOVE_BUFS))
2202 create->capabilities = V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS;
2203
2204 ret = ops->vidioc_create_bufs(file, fh, create);
2205
2206 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2207 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2208 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2209
2210 return ret;
2211 }
2212
v4l_prepare_buf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2213 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2214 struct file *file, void *fh, void *arg)
2215 {
2216 struct v4l2_buffer *b = arg;
2217 int ret = check_fmt(file, b->type);
2218
2219 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2220 }
2221
v4l_remove_bufs(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2222 static int v4l_remove_bufs(const struct v4l2_ioctl_ops *ops,
2223 struct file *file, void *fh, void *arg)
2224 {
2225 struct v4l2_remove_buffers *remove = arg;
2226
2227 if (ops->vidioc_remove_bufs)
2228 return ops->vidioc_remove_bufs(file, fh, remove);
2229
2230 return -ENOTTY;
2231 }
2232
v4l_g_parm(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2233 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2234 struct file *file, void *fh, void *arg)
2235 {
2236 struct video_device *vfd = video_devdata(file);
2237 struct v4l2_streamparm *p = arg;
2238 v4l2_std_id std;
2239 int ret = check_fmt(file, p->type);
2240
2241 if (ret)
2242 return ret;
2243 if (ops->vidioc_g_parm)
2244 return ops->vidioc_g_parm(file, fh, p);
2245 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2246 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2247 return -EINVAL;
2248 if (vfd->device_caps & V4L2_CAP_READWRITE)
2249 p->parm.capture.readbuffers = 2;
2250 ret = ops->vidioc_g_std(file, fh, &std);
2251 if (ret == 0)
2252 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2253 return ret;
2254 }
2255
v4l_s_parm(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2256 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2257 struct file *file, void *fh, void *arg)
2258 {
2259 struct v4l2_streamparm *p = arg;
2260 int ret = check_fmt(file, p->type);
2261
2262 if (ret)
2263 return ret;
2264
2265 /* Note: extendedmode is never used in drivers */
2266 if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2267 memset(p->parm.output.reserved, 0,
2268 sizeof(p->parm.output.reserved));
2269 p->parm.output.extendedmode = 0;
2270 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2271 } else {
2272 memset(p->parm.capture.reserved, 0,
2273 sizeof(p->parm.capture.reserved));
2274 p->parm.capture.extendedmode = 0;
2275 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2276 }
2277 return ops->vidioc_s_parm(file, fh, p);
2278 }
2279
v4l_queryctrl(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2280 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2281 struct file *file, void *fh, void *arg)
2282 {
2283 struct video_device *vfd = video_devdata(file);
2284 struct v4l2_queryctrl *p = arg;
2285 struct v4l2_fh *vfh =
2286 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2287
2288 if (vfh && vfh->ctrl_handler)
2289 return v4l2_queryctrl(vfh->ctrl_handler, p);
2290 if (vfd->ctrl_handler)
2291 return v4l2_queryctrl(vfd->ctrl_handler, p);
2292 if (ops->vidioc_queryctrl)
2293 return ops->vidioc_queryctrl(file, fh, p);
2294 return -ENOTTY;
2295 }
2296
v4l_query_ext_ctrl(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2297 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2298 struct file *file, void *fh, void *arg)
2299 {
2300 struct video_device *vfd = video_devdata(file);
2301 struct v4l2_query_ext_ctrl *p = arg;
2302 struct v4l2_fh *vfh =
2303 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2304
2305 if (vfh && vfh->ctrl_handler)
2306 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2307 if (vfd->ctrl_handler)
2308 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2309 if (ops->vidioc_query_ext_ctrl)
2310 return ops->vidioc_query_ext_ctrl(file, fh, p);
2311 return -ENOTTY;
2312 }
2313
v4l_querymenu(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2314 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2315 struct file *file, void *fh, void *arg)
2316 {
2317 struct video_device *vfd = video_devdata(file);
2318 struct v4l2_querymenu *p = arg;
2319 struct v4l2_fh *vfh =
2320 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2321
2322 if (vfh && vfh->ctrl_handler)
2323 return v4l2_querymenu(vfh->ctrl_handler, p);
2324 if (vfd->ctrl_handler)
2325 return v4l2_querymenu(vfd->ctrl_handler, p);
2326 if (ops->vidioc_querymenu)
2327 return ops->vidioc_querymenu(file, fh, p);
2328 return -ENOTTY;
2329 }
2330
v4l_g_ctrl(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2331 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2332 struct file *file, void *fh, void *arg)
2333 {
2334 struct video_device *vfd = video_devdata(file);
2335 struct v4l2_control *p = arg;
2336 struct v4l2_fh *vfh =
2337 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2338 struct v4l2_ext_controls ctrls;
2339 struct v4l2_ext_control ctrl;
2340
2341 if (vfh && vfh->ctrl_handler)
2342 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2343 if (vfd->ctrl_handler)
2344 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2345 if (ops->vidioc_g_ctrl)
2346 return ops->vidioc_g_ctrl(file, fh, p);
2347 if (ops->vidioc_g_ext_ctrls == NULL)
2348 return -ENOTTY;
2349
2350 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2351 ctrls.count = 1;
2352 ctrls.controls = &ctrl;
2353 ctrl.id = p->id;
2354 ctrl.value = p->value;
2355 if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
2356 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2357
2358 if (ret == 0)
2359 p->value = ctrl.value;
2360 return ret;
2361 }
2362 return -EINVAL;
2363 }
2364
v4l_s_ctrl(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2365 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2366 struct file *file, void *fh, void *arg)
2367 {
2368 struct video_device *vfd = video_devdata(file);
2369 struct v4l2_control *p = arg;
2370 struct v4l2_fh *vfh =
2371 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2372 struct v4l2_ext_controls ctrls;
2373 struct v4l2_ext_control ctrl;
2374 int ret;
2375
2376 if (vfh && vfh->ctrl_handler)
2377 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2378 if (vfd->ctrl_handler)
2379 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2380 if (ops->vidioc_s_ctrl)
2381 return ops->vidioc_s_ctrl(file, fh, p);
2382 if (ops->vidioc_s_ext_ctrls == NULL)
2383 return -ENOTTY;
2384
2385 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2386 ctrls.count = 1;
2387 ctrls.controls = &ctrl;
2388 ctrl.id = p->id;
2389 ctrl.value = p->value;
2390 if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
2391 return -EINVAL;
2392 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2393 p->value = ctrl.value;
2394 return ret;
2395 }
2396
v4l_g_ext_ctrls(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2397 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2398 struct file *file, void *fh, void *arg)
2399 {
2400 struct video_device *vfd = video_devdata(file);
2401 struct v4l2_ext_controls *p = arg;
2402 struct v4l2_fh *vfh =
2403 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2404
2405 p->error_idx = p->count;
2406 if (vfh && vfh->ctrl_handler)
2407 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2408 vfd, vfd->v4l2_dev->mdev, p);
2409 if (vfd->ctrl_handler)
2410 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2411 vfd, vfd->v4l2_dev->mdev, p);
2412 if (ops->vidioc_g_ext_ctrls == NULL)
2413 return -ENOTTY;
2414 return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
2415 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2416 }
2417
v4l_s_ext_ctrls(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2418 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2419 struct file *file, void *fh, void *arg)
2420 {
2421 struct video_device *vfd = video_devdata(file);
2422 struct v4l2_ext_controls *p = arg;
2423 struct v4l2_fh *vfh =
2424 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2425
2426 p->error_idx = p->count;
2427 if (vfh && vfh->ctrl_handler)
2428 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2429 vfd, vfd->v4l2_dev->mdev, p);
2430 if (vfd->ctrl_handler)
2431 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2432 vfd, vfd->v4l2_dev->mdev, p);
2433 if (ops->vidioc_s_ext_ctrls == NULL)
2434 return -ENOTTY;
2435 return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
2436 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2437 }
2438
v4l_try_ext_ctrls(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2439 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2440 struct file *file, void *fh, void *arg)
2441 {
2442 struct video_device *vfd = video_devdata(file);
2443 struct v4l2_ext_controls *p = arg;
2444 struct v4l2_fh *vfh =
2445 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2446
2447 p->error_idx = p->count;
2448 if (vfh && vfh->ctrl_handler)
2449 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2450 vfd, vfd->v4l2_dev->mdev, p);
2451 if (vfd->ctrl_handler)
2452 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2453 vfd, vfd->v4l2_dev->mdev, p);
2454 if (ops->vidioc_try_ext_ctrls == NULL)
2455 return -ENOTTY;
2456 return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
2457 ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2458 }
2459
2460 /*
2461 * The selection API specified originally that the _MPLANE buffer types
2462 * shouldn't be used. The reasons for this are lost in the mists of time
2463 * (or just really crappy memories). Regardless, this is really annoying
2464 * for userspace. So to keep things simple we map _MPLANE buffer types
2465 * to their 'regular' counterparts before calling the driver. And we
2466 * restore it afterwards. This way applications can use either buffer
2467 * type and drivers don't need to check for both.
2468 */
v4l_g_selection(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2469 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2470 struct file *file, void *fh, void *arg)
2471 {
2472 struct v4l2_selection *p = arg;
2473 u32 old_type = p->type;
2474 int ret;
2475
2476 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2477 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2478 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2479 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2480 ret = ops->vidioc_g_selection(file, fh, p);
2481 p->type = old_type;
2482 return ret;
2483 }
2484
v4l_s_selection(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2485 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2486 struct file *file, void *fh, void *arg)
2487 {
2488 struct v4l2_selection *p = arg;
2489 u32 old_type = p->type;
2490 int ret;
2491
2492 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2493 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2494 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2495 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2496 ret = ops->vidioc_s_selection(file, fh, p);
2497 p->type = old_type;
2498 return ret;
2499 }
2500
v4l_g_crop(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2501 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2502 struct file *file, void *fh, void *arg)
2503 {
2504 struct video_device *vfd = video_devdata(file);
2505 struct v4l2_crop *p = arg;
2506 struct v4l2_selection s = {
2507 .type = p->type,
2508 };
2509 int ret;
2510
2511 /* simulate capture crop using selection api */
2512
2513 /* crop means compose for output devices */
2514 if (V4L2_TYPE_IS_OUTPUT(p->type))
2515 s.target = V4L2_SEL_TGT_COMPOSE;
2516 else
2517 s.target = V4L2_SEL_TGT_CROP;
2518
2519 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2520 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2521 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2522
2523 ret = v4l_g_selection(ops, file, fh, &s);
2524
2525 /* copying results to old structure on success */
2526 if (!ret)
2527 p->c = s.r;
2528 return ret;
2529 }
2530
v4l_s_crop(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2531 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2532 struct file *file, void *fh, void *arg)
2533 {
2534 struct video_device *vfd = video_devdata(file);
2535 struct v4l2_crop *p = arg;
2536 struct v4l2_selection s = {
2537 .type = p->type,
2538 .r = p->c,
2539 };
2540
2541 /* simulate capture crop using selection api */
2542
2543 /* crop means compose for output devices */
2544 if (V4L2_TYPE_IS_OUTPUT(p->type))
2545 s.target = V4L2_SEL_TGT_COMPOSE;
2546 else
2547 s.target = V4L2_SEL_TGT_CROP;
2548
2549 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2550 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2551 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2552
2553 return v4l_s_selection(ops, file, fh, &s);
2554 }
2555
v4l_cropcap(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2556 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2557 struct file *file, void *fh, void *arg)
2558 {
2559 struct video_device *vfd = video_devdata(file);
2560 struct v4l2_cropcap *p = arg;
2561 struct v4l2_selection s = { .type = p->type };
2562 int ret = 0;
2563
2564 /* setting trivial pixelaspect */
2565 p->pixelaspect.numerator = 1;
2566 p->pixelaspect.denominator = 1;
2567
2568 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2569 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2570 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2571 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2572
2573 /*
2574 * The determine_valid_ioctls() call already should ensure
2575 * that this can never happen, but just in case...
2576 */
2577 if (WARN_ON(!ops->vidioc_g_selection))
2578 return -ENOTTY;
2579
2580 if (ops->vidioc_g_pixelaspect)
2581 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2582 &p->pixelaspect);
2583
2584 /*
2585 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2586 * square pixel aspect ratio in that case.
2587 */
2588 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2589 return ret;
2590
2591 /* Use g_selection() to fill in the bounds and defrect rectangles */
2592
2593 /* obtaining bounds */
2594 if (V4L2_TYPE_IS_OUTPUT(p->type))
2595 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2596 else
2597 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2598
2599 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2600 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2601 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2602
2603 ret = v4l_g_selection(ops, file, fh, &s);
2604 if (ret)
2605 return ret;
2606 p->bounds = s.r;
2607
2608 /* obtaining defrect */
2609 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2610 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2611 else
2612 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2613
2614 ret = v4l_g_selection(ops, file, fh, &s);
2615 if (ret)
2616 return ret;
2617 p->defrect = s.r;
2618
2619 return 0;
2620 }
2621
v4l_log_status(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2622 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2623 struct file *file, void *fh, void *arg)
2624 {
2625 struct video_device *vfd = video_devdata(file);
2626 int ret;
2627
2628 if (vfd->v4l2_dev)
2629 pr_info("%s: ================= START STATUS =================\n",
2630 vfd->v4l2_dev->name);
2631 ret = ops->vidioc_log_status(file, fh);
2632 if (vfd->v4l2_dev)
2633 pr_info("%s: ================== END STATUS ==================\n",
2634 vfd->v4l2_dev->name);
2635 return ret;
2636 }
2637
v4l_dbg_g_register(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2638 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2639 struct file *file, void *fh, void *arg)
2640 {
2641 #ifdef CONFIG_VIDEO_ADV_DEBUG
2642 struct v4l2_dbg_register *p = arg;
2643 struct video_device *vfd = video_devdata(file);
2644 struct v4l2_subdev *sd;
2645 int idx = 0;
2646
2647 if (!capable(CAP_SYS_ADMIN))
2648 return -EPERM;
2649 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2650 if (vfd->v4l2_dev == NULL)
2651 return -EINVAL;
2652 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2653 if (p->match.addr == idx++)
2654 return v4l2_subdev_call(sd, core, g_register, p);
2655 return -EINVAL;
2656 }
2657 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2658 (ops->vidioc_g_chip_info || p->match.addr == 0))
2659 return ops->vidioc_g_register(file, fh, p);
2660 return -EINVAL;
2661 #else
2662 return -ENOTTY;
2663 #endif
2664 }
2665
v4l_dbg_s_register(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2666 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2667 struct file *file, void *fh, void *arg)
2668 {
2669 #ifdef CONFIG_VIDEO_ADV_DEBUG
2670 const struct v4l2_dbg_register *p = arg;
2671 struct video_device *vfd = video_devdata(file);
2672 struct v4l2_subdev *sd;
2673 int idx = 0;
2674
2675 if (!capable(CAP_SYS_ADMIN))
2676 return -EPERM;
2677 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2678 if (vfd->v4l2_dev == NULL)
2679 return -EINVAL;
2680 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2681 if (p->match.addr == idx++)
2682 return v4l2_subdev_call(sd, core, s_register, p);
2683 return -EINVAL;
2684 }
2685 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2686 (ops->vidioc_g_chip_info || p->match.addr == 0))
2687 return ops->vidioc_s_register(file, fh, p);
2688 return -EINVAL;
2689 #else
2690 return -ENOTTY;
2691 #endif
2692 }
2693
v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2694 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2695 struct file *file, void *fh, void *arg)
2696 {
2697 #ifdef CONFIG_VIDEO_ADV_DEBUG
2698 struct video_device *vfd = video_devdata(file);
2699 struct v4l2_dbg_chip_info *p = arg;
2700 struct v4l2_subdev *sd;
2701 int idx = 0;
2702
2703 switch (p->match.type) {
2704 case V4L2_CHIP_MATCH_BRIDGE:
2705 if (ops->vidioc_s_register)
2706 p->flags |= V4L2_CHIP_FL_WRITABLE;
2707 if (ops->vidioc_g_register)
2708 p->flags |= V4L2_CHIP_FL_READABLE;
2709 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2710 if (ops->vidioc_g_chip_info)
2711 return ops->vidioc_g_chip_info(file, fh, arg);
2712 if (p->match.addr)
2713 return -EINVAL;
2714 return 0;
2715
2716 case V4L2_CHIP_MATCH_SUBDEV:
2717 if (vfd->v4l2_dev == NULL)
2718 break;
2719 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2720 if (p->match.addr != idx++)
2721 continue;
2722 if (sd->ops->core && sd->ops->core->s_register)
2723 p->flags |= V4L2_CHIP_FL_WRITABLE;
2724 if (sd->ops->core && sd->ops->core->g_register)
2725 p->flags |= V4L2_CHIP_FL_READABLE;
2726 strscpy(p->name, sd->name, sizeof(p->name));
2727 return 0;
2728 }
2729 break;
2730 }
2731 return -EINVAL;
2732 #else
2733 return -ENOTTY;
2734 #endif
2735 }
2736
v4l_dqevent(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2737 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2738 struct file *file, void *fh, void *arg)
2739 {
2740 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2741 }
2742
v4l_subscribe_event(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2743 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2744 struct file *file, void *fh, void *arg)
2745 {
2746 return ops->vidioc_subscribe_event(fh, arg);
2747 }
2748
v4l_unsubscribe_event(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2749 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2750 struct file *file, void *fh, void *arg)
2751 {
2752 return ops->vidioc_unsubscribe_event(fh, arg);
2753 }
2754
v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2755 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2756 struct file *file, void *fh, void *arg)
2757 {
2758 struct v4l2_sliced_vbi_cap *p = arg;
2759 int ret = check_fmt(file, p->type);
2760
2761 if (ret)
2762 return ret;
2763
2764 /* Clear up to type, everything after type is zeroed already */
2765 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2766
2767 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2768 }
2769
v4l_enum_freq_bands(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2770 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2771 struct file *file, void *fh, void *arg)
2772 {
2773 struct video_device *vfd = video_devdata(file);
2774 struct v4l2_frequency_band *p = arg;
2775 enum v4l2_tuner_type type;
2776 int err;
2777
2778 if (vfd->vfl_type == VFL_TYPE_SDR) {
2779 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2780 return -EINVAL;
2781 type = p->type;
2782 } else {
2783 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2784 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2785 if (type != p->type)
2786 return -EINVAL;
2787 }
2788 if (ops->vidioc_enum_freq_bands) {
2789 err = ops->vidioc_enum_freq_bands(file, fh, p);
2790 if (err != -ENOTTY)
2791 return err;
2792 }
2793 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2794 struct v4l2_tuner t = {
2795 .index = p->tuner,
2796 .type = type,
2797 };
2798
2799 if (p->index)
2800 return -EINVAL;
2801 err = ops->vidioc_g_tuner(file, fh, &t);
2802 if (err)
2803 return err;
2804 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2805 p->rangelow = t.rangelow;
2806 p->rangehigh = t.rangehigh;
2807 p->modulation = (type == V4L2_TUNER_RADIO) ?
2808 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2809 return 0;
2810 }
2811 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2812 struct v4l2_modulator m = {
2813 .index = p->tuner,
2814 };
2815
2816 if (type != V4L2_TUNER_RADIO)
2817 return -EINVAL;
2818 if (p->index)
2819 return -EINVAL;
2820 err = ops->vidioc_g_modulator(file, fh, &m);
2821 if (err)
2822 return err;
2823 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2824 p->rangelow = m.rangelow;
2825 p->rangehigh = m.rangehigh;
2826 p->modulation = (type == V4L2_TUNER_RADIO) ?
2827 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2828 return 0;
2829 }
2830 return -ENOTTY;
2831 }
2832
2833 struct v4l2_ioctl_info {
2834 unsigned int ioctl;
2835 u32 flags;
2836 const char * const name;
2837 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2838 void *fh, void *p);
2839 void (*debug)(const void *arg, bool write_only);
2840 };
2841
2842 /* This control needs a priority check */
2843 #define INFO_FL_PRIO (1 << 0)
2844 /* This control can be valid if the filehandle passes a control handler. */
2845 #define INFO_FL_CTRL (1 << 1)
2846 /* Queuing ioctl */
2847 #define INFO_FL_QUEUE (1 << 2)
2848 /* Always copy back result, even on error */
2849 #define INFO_FL_ALWAYS_COPY (1 << 3)
2850 /* Zero struct from after the field to the end */
2851 #define INFO_FL_CLEAR(v4l2_struct, field) \
2852 ((offsetof(struct v4l2_struct, field) + \
2853 sizeof_field(struct v4l2_struct, field)) << 16)
2854 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2855
2856 #define DEFINE_V4L_STUB_FUNC(_vidioc) \
2857 static int v4l_stub_ ## _vidioc( \
2858 const struct v4l2_ioctl_ops *ops, \
2859 struct file *file, void *fh, void *p) \
2860 { \
2861 return ops->vidioc_ ## _vidioc(file, fh, p); \
2862 }
2863
2864 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \
2865 [_IOC_NR(_ioctl)] = { \
2866 .ioctl = _ioctl, \
2867 .flags = _flags, \
2868 .name = #_ioctl, \
2869 .func = _func, \
2870 .debug = _debug, \
2871 }
2872
2873 DEFINE_V4L_STUB_FUNC(g_fbuf)
2874 DEFINE_V4L_STUB_FUNC(expbuf)
2875 DEFINE_V4L_STUB_FUNC(g_std)
2876 DEFINE_V4L_STUB_FUNC(g_audio)
2877 DEFINE_V4L_STUB_FUNC(s_audio)
2878 DEFINE_V4L_STUB_FUNC(g_edid)
2879 DEFINE_V4L_STUB_FUNC(s_edid)
2880 DEFINE_V4L_STUB_FUNC(g_audout)
2881 DEFINE_V4L_STUB_FUNC(s_audout)
2882 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2883 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2884 DEFINE_V4L_STUB_FUNC(enumaudio)
2885 DEFINE_V4L_STUB_FUNC(enumaudout)
2886 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2887 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2888 DEFINE_V4L_STUB_FUNC(g_enc_index)
2889 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2890 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2891 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2892 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2893 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2894 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2895 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2896 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2897 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2898
2899 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2900 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2901 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2902 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2903 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2904 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2905 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2906 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2907 IOCTL_INFO(VIDIOC_S_FBUF, v4l_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2908 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2909 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2910 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2911 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2912 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2913 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2914 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2915 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2916 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2917 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2918 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2919 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2920 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2921 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2922 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2923 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2924 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2925 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2926 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2927 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2928 IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2929 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2930 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2931 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2932 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2933 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2934 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2935 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2936 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2937 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2938 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2939 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2940 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2941 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2942 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2943 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2944 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2945 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2946 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2947 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2948 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2949 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2950 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2951 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2952 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2953 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2954 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)),
2955 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2956 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2957 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2958 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2959 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2960 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2961 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2962 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2963 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2964 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2965 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2966 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2967 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2968 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2969 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)),
2970 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2971 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2972 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2973 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2974 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2975 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2976 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2977 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2978 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2979 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2980 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)),
2981 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)),
2982 IOCTL_INFO(VIDIOC_REMOVE_BUFS, v4l_remove_bufs, v4l_print_remove_buffers, INFO_FL_PRIO | INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_remove_buffers, type)),
2983 };
2984 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2985
v4l2_is_known_ioctl(unsigned int cmd)2986 static bool v4l2_is_known_ioctl(unsigned int cmd)
2987 {
2988 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2989 return false;
2990 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2991 }
2992
v4l2_ioctl_get_lock(struct video_device * vdev,struct v4l2_fh * vfh,unsigned int cmd,void * arg)2993 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2994 struct v4l2_fh *vfh, unsigned int cmd,
2995 void *arg)
2996 {
2997 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2998 return vdev->lock;
2999 if (vfh && vfh->m2m_ctx &&
3000 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
3001 if (vfh->m2m_ctx->q_lock)
3002 return vfh->m2m_ctx->q_lock;
3003 }
3004 if (vdev->queue && vdev->queue->lock &&
3005 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
3006 return vdev->queue->lock;
3007 return vdev->lock;
3008 }
3009
3010 /* Common ioctl debug function. This function can be used by
3011 external ioctl messages as well as internal V4L ioctl */
v4l_printk_ioctl(const char * prefix,unsigned int cmd)3012 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
3013 {
3014 const char *dir, *type;
3015
3016 if (prefix)
3017 printk(KERN_DEBUG "%s: ", prefix);
3018
3019 switch (_IOC_TYPE(cmd)) {
3020 case 'd':
3021 type = "v4l2_int";
3022 break;
3023 case 'V':
3024 if (!v4l2_is_known_ioctl(cmd)) {
3025 type = "v4l2";
3026 break;
3027 }
3028 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
3029 return;
3030 default:
3031 type = "unknown";
3032 break;
3033 }
3034
3035 switch (_IOC_DIR(cmd)) {
3036 case _IOC_NONE: dir = "--"; break;
3037 case _IOC_READ: dir = "r-"; break;
3038 case _IOC_WRITE: dir = "-w"; break;
3039 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
3040 default: dir = "*ERR*"; break;
3041 }
3042 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
3043 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
3044 }
3045 EXPORT_SYMBOL(v4l_printk_ioctl);
3046
__video_do_ioctl(struct file * file,unsigned int cmd,void * arg)3047 static long __video_do_ioctl(struct file *file,
3048 unsigned int cmd, void *arg)
3049 {
3050 struct video_device *vfd = video_devdata(file);
3051 struct mutex *req_queue_lock = NULL;
3052 struct mutex *lock; /* ioctl serialization mutex */
3053 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
3054 bool write_only = false;
3055 struct v4l2_ioctl_info default_info;
3056 const struct v4l2_ioctl_info *info;
3057 void *fh = file->private_data;
3058 struct v4l2_fh *vfh = NULL;
3059 int dev_debug = vfd->dev_debug;
3060 long ret = -ENOTTY;
3061
3062 if (ops == NULL) {
3063 pr_warn("%s: has no ioctl_ops.\n",
3064 video_device_node_name(vfd));
3065 return ret;
3066 }
3067
3068 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
3069 vfh = file->private_data;
3070
3071 /*
3072 * We need to serialize streamon/off with queueing new requests.
3073 * These ioctls may trigger the cancellation of a streaming
3074 * operation, and that should not be mixed with queueing a new
3075 * request at the same time.
3076 */
3077 if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
3078 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
3079 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
3080
3081 if (mutex_lock_interruptible(req_queue_lock))
3082 return -ERESTARTSYS;
3083 }
3084
3085 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
3086
3087 if (lock && mutex_lock_interruptible(lock)) {
3088 if (req_queue_lock)
3089 mutex_unlock(req_queue_lock);
3090 return -ERESTARTSYS;
3091 }
3092
3093 if (!video_is_registered(vfd)) {
3094 ret = -ENODEV;
3095 goto unlock;
3096 }
3097
3098 if (v4l2_is_known_ioctl(cmd)) {
3099 info = &v4l2_ioctls[_IOC_NR(cmd)];
3100
3101 if (!is_valid_ioctl(vfd, cmd) &&
3102 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
3103 goto done;
3104
3105 if (vfh && (info->flags & INFO_FL_PRIO)) {
3106 ret = v4l2_prio_check(vfd->prio, vfh->prio);
3107 if (ret)
3108 goto done;
3109 }
3110 } else {
3111 default_info.ioctl = cmd;
3112 default_info.flags = 0;
3113 default_info.debug = v4l_print_default;
3114 info = &default_info;
3115 }
3116
3117 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
3118 if (info != &default_info) {
3119 ret = info->func(ops, file, fh, arg);
3120 } else if (!ops->vidioc_default) {
3121 ret = -ENOTTY;
3122 } else {
3123 ret = ops->vidioc_default(file, fh,
3124 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
3125 cmd, arg);
3126 }
3127
3128 done:
3129 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
3130 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3131 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3132 goto unlock;
3133
3134 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3135 if (ret < 0)
3136 pr_cont(": error %ld", ret);
3137 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3138 pr_cont("\n");
3139 else if (_IOC_DIR(cmd) == _IOC_NONE)
3140 info->debug(arg, write_only);
3141 else {
3142 pr_cont(": ");
3143 info->debug(arg, write_only);
3144 }
3145 }
3146
3147 unlock:
3148 if (lock)
3149 mutex_unlock(lock);
3150 if (req_queue_lock)
3151 mutex_unlock(req_queue_lock);
3152 return ret;
3153 }
3154
check_array_args(unsigned int cmd,void * parg,size_t * array_size,void __user ** user_ptr,void *** kernel_ptr)3155 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3156 void __user **user_ptr, void ***kernel_ptr)
3157 {
3158 int ret = 0;
3159
3160 switch (cmd) {
3161 case VIDIOC_PREPARE_BUF:
3162 case VIDIOC_QUERYBUF:
3163 case VIDIOC_QBUF:
3164 case VIDIOC_DQBUF: {
3165 struct v4l2_buffer *buf = parg;
3166
3167 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3168 if (buf->length > VIDEO_MAX_PLANES) {
3169 ret = -EINVAL;
3170 break;
3171 }
3172 *user_ptr = (void __user *)buf->m.planes;
3173 *kernel_ptr = (void **)&buf->m.planes;
3174 *array_size = sizeof(struct v4l2_plane) * buf->length;
3175 ret = 1;
3176 }
3177 break;
3178 }
3179
3180 case VIDIOC_G_EDID:
3181 case VIDIOC_S_EDID: {
3182 struct v4l2_edid *edid = parg;
3183
3184 if (edid->blocks) {
3185 if (edid->blocks > 256) {
3186 ret = -EINVAL;
3187 break;
3188 }
3189 *user_ptr = (void __user *)edid->edid;
3190 *kernel_ptr = (void **)&edid->edid;
3191 *array_size = edid->blocks * 128;
3192 ret = 1;
3193 }
3194 break;
3195 }
3196
3197 case VIDIOC_S_EXT_CTRLS:
3198 case VIDIOC_G_EXT_CTRLS:
3199 case VIDIOC_TRY_EXT_CTRLS: {
3200 struct v4l2_ext_controls *ctrls = parg;
3201
3202 if (ctrls->count != 0) {
3203 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3204 ret = -EINVAL;
3205 break;
3206 }
3207 *user_ptr = (void __user *)ctrls->controls;
3208 *kernel_ptr = (void **)&ctrls->controls;
3209 *array_size = sizeof(struct v4l2_ext_control)
3210 * ctrls->count;
3211 ret = 1;
3212 }
3213 break;
3214 }
3215
3216 case VIDIOC_SUBDEV_G_ROUTING:
3217 case VIDIOC_SUBDEV_S_ROUTING: {
3218 struct v4l2_subdev_routing *routing = parg;
3219
3220 if (routing->len_routes > 256)
3221 return -E2BIG;
3222
3223 *user_ptr = u64_to_user_ptr(routing->routes);
3224 *kernel_ptr = (void **)&routing->routes;
3225 *array_size = sizeof(struct v4l2_subdev_route)
3226 * routing->len_routes;
3227 ret = 1;
3228 break;
3229 }
3230 }
3231
3232 return ret;
3233 }
3234
video_translate_cmd(unsigned int cmd)3235 static unsigned int video_translate_cmd(unsigned int cmd)
3236 {
3237 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3238 switch (cmd) {
3239 case VIDIOC_DQEVENT_TIME32:
3240 return VIDIOC_DQEVENT;
3241 case VIDIOC_QUERYBUF_TIME32:
3242 return VIDIOC_QUERYBUF;
3243 case VIDIOC_QBUF_TIME32:
3244 return VIDIOC_QBUF;
3245 case VIDIOC_DQBUF_TIME32:
3246 return VIDIOC_DQBUF;
3247 case VIDIOC_PREPARE_BUF_TIME32:
3248 return VIDIOC_PREPARE_BUF;
3249 }
3250 #endif
3251 if (in_compat_syscall())
3252 return v4l2_compat_translate_cmd(cmd);
3253
3254 return cmd;
3255 }
3256
video_get_user(void __user * arg,void * parg,unsigned int real_cmd,unsigned int cmd,bool * always_copy)3257 static int video_get_user(void __user *arg, void *parg,
3258 unsigned int real_cmd, unsigned int cmd,
3259 bool *always_copy)
3260 {
3261 unsigned int n = _IOC_SIZE(real_cmd);
3262 int err = 0;
3263
3264 if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3265 /* read-only ioctl */
3266 memset(parg, 0, n);
3267 return 0;
3268 }
3269
3270 /*
3271 * In some cases, only a few fields are used as input,
3272 * i.e. when the app sets "index" and then the driver
3273 * fills in the rest of the structure for the thing
3274 * with that index. We only need to copy up the first
3275 * non-input field.
3276 */
3277 if (v4l2_is_known_ioctl(real_cmd)) {
3278 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3279
3280 if (flags & INFO_FL_CLEAR_MASK)
3281 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3282 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3283 }
3284
3285 if (cmd == real_cmd) {
3286 if (copy_from_user(parg, (void __user *)arg, n))
3287 err = -EFAULT;
3288 } else if (in_compat_syscall()) {
3289 memset(parg, 0, n);
3290 err = v4l2_compat_get_user(arg, parg, cmd);
3291 } else {
3292 memset(parg, 0, n);
3293 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3294 switch (cmd) {
3295 case VIDIOC_QUERYBUF_TIME32:
3296 case VIDIOC_QBUF_TIME32:
3297 case VIDIOC_DQBUF_TIME32:
3298 case VIDIOC_PREPARE_BUF_TIME32: {
3299 struct v4l2_buffer_time32 vb32;
3300 struct v4l2_buffer *vb = parg;
3301
3302 if (copy_from_user(&vb32, arg, sizeof(vb32)))
3303 return -EFAULT;
3304
3305 *vb = (struct v4l2_buffer) {
3306 .index = vb32.index,
3307 .type = vb32.type,
3308 .bytesused = vb32.bytesused,
3309 .flags = vb32.flags,
3310 .field = vb32.field,
3311 .timestamp.tv_sec = vb32.timestamp.tv_sec,
3312 .timestamp.tv_usec = vb32.timestamp.tv_usec,
3313 .timecode = vb32.timecode,
3314 .sequence = vb32.sequence,
3315 .memory = vb32.memory,
3316 .m.userptr = vb32.m.userptr,
3317 .length = vb32.length,
3318 .request_fd = vb32.request_fd,
3319 };
3320 break;
3321 }
3322 }
3323 #endif
3324 }
3325
3326 /* zero out anything we don't copy from userspace */
3327 if (!err && n < _IOC_SIZE(real_cmd))
3328 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3329 return err;
3330 }
3331
video_put_user(void __user * arg,void * parg,unsigned int real_cmd,unsigned int cmd)3332 static int video_put_user(void __user *arg, void *parg,
3333 unsigned int real_cmd, unsigned int cmd)
3334 {
3335 if (!(_IOC_DIR(cmd) & _IOC_READ))
3336 return 0;
3337
3338 if (cmd == real_cmd) {
3339 /* Copy results into user buffer */
3340 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3341 return -EFAULT;
3342 return 0;
3343 }
3344
3345 if (in_compat_syscall())
3346 return v4l2_compat_put_user(arg, parg, cmd);
3347
3348 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3349 switch (cmd) {
3350 case VIDIOC_DQEVENT_TIME32: {
3351 struct v4l2_event *ev = parg;
3352 struct v4l2_event_time32 ev32;
3353
3354 memset(&ev32, 0, sizeof(ev32));
3355
3356 ev32.type = ev->type;
3357 ev32.pending = ev->pending;
3358 ev32.sequence = ev->sequence;
3359 ev32.timestamp.tv_sec = ev->timestamp.tv_sec;
3360 ev32.timestamp.tv_nsec = ev->timestamp.tv_nsec;
3361 ev32.id = ev->id;
3362
3363 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3364 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3365
3366 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3367 return -EFAULT;
3368 break;
3369 }
3370 case VIDIOC_QUERYBUF_TIME32:
3371 case VIDIOC_QBUF_TIME32:
3372 case VIDIOC_DQBUF_TIME32:
3373 case VIDIOC_PREPARE_BUF_TIME32: {
3374 struct v4l2_buffer *vb = parg;
3375 struct v4l2_buffer_time32 vb32;
3376
3377 memset(&vb32, 0, sizeof(vb32));
3378
3379 vb32.index = vb->index;
3380 vb32.type = vb->type;
3381 vb32.bytesused = vb->bytesused;
3382 vb32.flags = vb->flags;
3383 vb32.field = vb->field;
3384 vb32.timestamp.tv_sec = vb->timestamp.tv_sec;
3385 vb32.timestamp.tv_usec = vb->timestamp.tv_usec;
3386 vb32.timecode = vb->timecode;
3387 vb32.sequence = vb->sequence;
3388 vb32.memory = vb->memory;
3389 vb32.m.userptr = vb->m.userptr;
3390 vb32.length = vb->length;
3391 vb32.request_fd = vb->request_fd;
3392
3393 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3394 return -EFAULT;
3395 break;
3396 }
3397 }
3398 #endif
3399
3400 return 0;
3401 }
3402
3403 long
video_usercopy(struct file * file,unsigned int orig_cmd,unsigned long arg,v4l2_kioctl func)3404 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3405 v4l2_kioctl func)
3406 {
3407 char sbuf[128];
3408 void *mbuf = NULL, *array_buf = NULL;
3409 void *parg = (void *)arg;
3410 long err = -EINVAL;
3411 bool has_array_args;
3412 bool always_copy = false;
3413 size_t array_size = 0;
3414 void __user *user_ptr = NULL;
3415 void **kernel_ptr = NULL;
3416 unsigned int cmd = video_translate_cmd(orig_cmd);
3417 const size_t ioc_size = _IOC_SIZE(cmd);
3418
3419 /* Copy arguments into temp kernel buffer */
3420 if (_IOC_DIR(cmd) != _IOC_NONE) {
3421 if (ioc_size <= sizeof(sbuf)) {
3422 parg = sbuf;
3423 } else {
3424 /* too big to allocate from stack */
3425 mbuf = kmalloc(ioc_size, GFP_KERNEL);
3426 if (NULL == mbuf)
3427 return -ENOMEM;
3428 parg = mbuf;
3429 }
3430
3431 err = video_get_user((void __user *)arg, parg, cmd,
3432 orig_cmd, &always_copy);
3433 if (err)
3434 goto out;
3435 }
3436
3437 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3438 if (err < 0)
3439 goto out;
3440 has_array_args = err;
3441
3442 if (has_array_args) {
3443 array_buf = kvmalloc(array_size, GFP_KERNEL);
3444 err = -ENOMEM;
3445 if (array_buf == NULL)
3446 goto out;
3447 if (in_compat_syscall())
3448 err = v4l2_compat_get_array_args(file, array_buf,
3449 user_ptr, array_size,
3450 orig_cmd, parg);
3451 else
3452 err = copy_from_user(array_buf, user_ptr, array_size) ?
3453 -EFAULT : 0;
3454 if (err)
3455 goto out;
3456 *kernel_ptr = array_buf;
3457 }
3458
3459 /* Handles IOCTL */
3460 err = func(file, cmd, parg);
3461 if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3462 err = -ENOTTY;
3463 goto out;
3464 }
3465
3466 if (err == 0) {
3467 if (cmd == VIDIOC_DQBUF)
3468 trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3469 else if (cmd == VIDIOC_QBUF)
3470 trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3471 }
3472
3473 /*
3474 * Some ioctls can return an error, but still have valid
3475 * results that must be returned.
3476 *
3477 * FIXME: subdev IOCTLS are partially handled here and partially in
3478 * v4l2-subdev.c and the 'always_copy' flag can only be set for IOCTLS
3479 * defined here as part of the 'v4l2_ioctls' array. As
3480 * VIDIOC_SUBDEV_[GS]_ROUTING needs to return results to applications
3481 * even in case of failure, but it is not defined here as part of the
3482 * 'v4l2_ioctls' array, insert an ad-hoc check to address that.
3483 */
3484 if (cmd == VIDIOC_SUBDEV_G_ROUTING || cmd == VIDIOC_SUBDEV_S_ROUTING)
3485 always_copy = true;
3486
3487 if (err < 0 && !always_copy)
3488 goto out;
3489
3490 if (has_array_args) {
3491 *kernel_ptr = (void __force *)user_ptr;
3492 if (in_compat_syscall()) {
3493 int put_err;
3494
3495 put_err = v4l2_compat_put_array_args(file, user_ptr,
3496 array_buf,
3497 array_size,
3498 orig_cmd, parg);
3499 if (put_err)
3500 err = put_err;
3501 } else if (copy_to_user(user_ptr, array_buf, array_size)) {
3502 err = -EFAULT;
3503 }
3504 }
3505
3506 if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3507 err = -EFAULT;
3508 out:
3509 kvfree(array_buf);
3510 kfree(mbuf);
3511 return err;
3512 }
3513
video_ioctl2(struct file * file,unsigned int cmd,unsigned long arg)3514 long video_ioctl2(struct file *file,
3515 unsigned int cmd, unsigned long arg)
3516 {
3517 return video_usercopy(file, cmd, arg, __video_do_ioctl);
3518 }
3519 EXPORT_SYMBOL(video_ioctl2);
3520