drivers/media/v4l2-core/v4l2-ioctl.c

   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, <[email protected]> (version 1)
   8  *              Mauro Carvalho Chehab <[email protected]> (version 2)
   9  */
  10
  11 #include <linux/compat.h>
  12 #include <linux/mm.h>
  13 #include <linux/module.h>
  14 #include <linux/slab.h>
  15 #include <linux/types.h>
  16 #include <linux/kernel.h>
  17 #include <linux/version.h>
  18
  19 #include <linux/v4l2-subdev.h>
  20 #include <linux/videodev2.h>
  21
  22 #include <media/media-device.h> /* for media_set_bus_info() */
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/videobuf2-v4l2.h>
  30 #include <media/v4l2-mc.h>
  31 #include <media/v4l2-mem2mem.h>
  32
  33 #include <trace/events/v4l2.h>
  34
  35 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  36
  37 struct std_descr {
  38         v4l2_std_id std;
  39         const char *descr;
  40 };
  41
  42 static const struct std_descr standards[] = {
  43         { V4L2_STD_NTSC,        "NTSC"      },
  44         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  45         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  46         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  47         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  48         { V4L2_STD_PAL,         "PAL"       },
  49         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  50         { V4L2_STD_PAL_B,       "PAL-B"     },
  51         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  52         { V4L2_STD_PAL_G,       "PAL-G"     },
  53         { V4L2_STD_PAL_H,       "PAL-H"     },
  54         { V4L2_STD_PAL_I,       "PAL-I"     },
  55         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  56         { V4L2_STD_PAL_D,       "PAL-D"     },
  57         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  58         { V4L2_STD_PAL_K,       "PAL-K"     },
  59         { V4L2_STD_PAL_M,       "PAL-M"     },
  60         { V4L2_STD_PAL_N,       "PAL-N"     },
  61         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  62         { V4L2_STD_PAL_60,      "PAL-60"    },
  63         { V4L2_STD_SECAM,       "SECAM"     },
  64         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  65         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  66         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  67         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  68         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  69         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  70         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  71         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  72         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  73         { 0,                    "Unknown"   }
  74 };
  75
  76 /* video4linux standard ID conversion to standard name
  77  */
  78 const char *v4l2_norm_to_name(v4l2_std_id id)
  79 {
  80         u32 myid = id;
  81         int i;
  82
  83         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  84            64 bit comparisons. So, on that architecture, with some gcc
  85            variants, compilation fails. Currently, the max value is 30bit wide.
  86          */
  87         BUG_ON(myid != id);
  88
  89         for (i = 0; standards[i].std; i++)
  90                 if (myid == standards[i].std)
  91                         break;
  92         return standards[i].descr;
  93 }
  94 EXPORT_SYMBOL(v4l2_norm_to_name);
  95
  96 /* Returns frame period for the given standard */
  97 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
  98 {
  99         if (id & V4L2_STD_525_60) {
 100                 frameperiod->numerator = 1001;
 101                 frameperiod->denominator = 30000;
 102         } else {
 103                 frameperiod->numerator = 1;
 104                 frameperiod->denominator = 25;
 105         }
 106 }
 107 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 108
 109 /* Fill in the fields of a v4l2_standard structure according to the
 110    'id' and 'transmission' parameters.  Returns negative on error.  */
 111 int v4l2_video_std_construct(struct v4l2_standard *vs,
 112                              int id, const char *name)
 113 {
 114         vs->id = id;
 115         v4l2_video_std_frame_period(id, &vs->frameperiod);
 116         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 117         strscpy(vs->name, name, sizeof(vs->name));
 118         return 0;
 119 }
 120 EXPORT_SYMBOL(v4l2_video_std_construct);
 121
 122 /* Fill in the fields of a v4l2_standard structure according to the
 123  * 'id' and 'vs->index' parameters. Returns negative on error. */
 124 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 125 {
 126         v4l2_std_id curr_id = 0;
 127         unsigned int index = vs->index, i, j = 0;
 128         const char *descr = "";
 129
 130         /* Return -ENODATA if the id for the current input
 131            or output is 0, meaning that it doesn't support this API. */
 132         if (id == 0)
 133                 return -ENODATA;
 134
 135         /* Return norm array in a canonical way */
 136         for (i = 0; i <= index && id; i++) {
 137                 /* last std value in the standards array is 0, so this
 138                    while always ends there since (id & 0) == 0. */
 139                 while ((id & standards[j].std) != standards[j].std)
 140                         j++;
 141                 curr_id = standards[j].std;
 142                 descr = standards[j].descr;
 143                 j++;
 144                 if (curr_id == 0)
 145                         break;
 146                 if (curr_id != V4L2_STD_PAL &&
 147                                 curr_id != V4L2_STD_SECAM &&
 148                                 curr_id != V4L2_STD_NTSC)
 149                         id &= ~curr_id;
 150         }
 151         if (i <= index)
 152                 return -EINVAL;
 153
 154         v4l2_video_std_construct(vs, curr_id, descr);
 155         return 0;
 156 }
 157
 158 /* ----------------------------------------------------------------- */
 159 /* some arrays for pretty-printing debug messages of enum types      */
 160
 161 const char *v4l2_field_names[] = {
 162         [V4L2_FIELD_ANY]        = "any",
 163         [V4L2_FIELD_NONE]       = "none",
 164         [V4L2_FIELD_TOP]        = "top",
 165         [V4L2_FIELD_BOTTOM]     = "bottom",
 166         [V4L2_FIELD_INTERLACED] = "interlaced",
 167         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 168         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 169         [V4L2_FIELD_ALTERNATE]  = "alternate",
 170         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 171         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 172 };
 173 EXPORT_SYMBOL(v4l2_field_names);
 174
 175 const char *v4l2_type_names[] = {
 176         [0]                                = "0",
 177         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 178         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 179         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 180         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 181         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 182         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 183         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 184         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 185         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 186         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 187         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 188         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 189         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 190         [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 191 };
 192 EXPORT_SYMBOL(v4l2_type_names);
 193
 194 static const char *v4l2_memory_names[] = {
 195         [V4L2_MEMORY_MMAP]    = "mmap",
 196         [V4L2_MEMORY_USERPTR] = "userptr",
 197         [V4L2_MEMORY_OVERLAY] = "overlay",
 198         [V4L2_MEMORY_DMABUF] = "dmabuf",
 199 };
 200
 201 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 202
 203 /* ------------------------------------------------------------------ */
 204 /* debug help functions                                               */
 205
 206 static void v4l_print_querycap(const void *arg, bool write_only)
 207 {
 208         const struct v4l2_capability *p = arg;
 209
 210         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 211                 (int)sizeof(p->driver), p->driver,
 212                 (int)sizeof(p->card), p->card,
 213                 (int)sizeof(p->bus_info), p->bus_info,
 214                 p->version, p->capabilities, p->device_caps);
 215 }
 216
 217 static void v4l_print_enuminput(const void *arg, bool write_only)
 218 {
 219         const struct v4l2_input *p = arg;
 220
 221         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 222                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 223                 p->tuner, (unsigned long long)p->std, p->status,
 224                 p->capabilities);
 225 }
 226
 227 static void v4l_print_enumoutput(const void *arg, bool write_only)
 228 {
 229         const struct v4l2_output *p = arg;
 230
 231         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 232                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 233                 p->modulator, (unsigned long long)p->std, p->capabilities);
 234 }
 235
 236 static void v4l_print_audio(const void *arg, bool write_only)
 237 {
 238         const struct v4l2_audio *p = arg;
 239
 240         if (write_only)
 241                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 242         else
 243                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 244                         p->index, (int)sizeof(p->name), p->name,
 245                         p->capability, p->mode);
 246 }
 247
 248 static void v4l_print_audioout(const void *arg, bool write_only)
 249 {
 250         const struct v4l2_audioout *p = arg;
 251
 252         if (write_only)
 253                 pr_cont("index=%u\n", p->index);
 254         else
 255                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 256                         p->index, (int)sizeof(p->name), p->name,
 257                         p->capability, p->mode);
 258 }
 259
 260 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 261 {
 262         const struct v4l2_fmtdesc *p = arg;
 263
 264         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
 265                 p->index, prt_names(p->type, v4l2_type_names),
 266                 p->flags, &p->pixelformat, p->mbus_code,
 267                 (int)sizeof(p->description), p->description);
 268 }
 269
 270 static void v4l_print_format(const void *arg, bool write_only)
 271 {
 272         const struct v4l2_format *p = arg;
 273         const struct v4l2_pix_format *pix;
 274         const struct v4l2_pix_format_mplane *mp;
 275         const struct v4l2_vbi_format *vbi;
 276         const struct v4l2_sliced_vbi_format *sliced;
 277         const struct v4l2_window *win;
 278         const struct v4l2_meta_format *meta;
 279         u32 pixelformat;
 280         u32 planes;
 281         unsigned i;
 282
 283         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 284         switch (p->type) {
 285         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 286         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 287                 pix = &p->fmt.pix;
 288                 pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 289                         pix->width, pix->height, &pix->pixelformat,
 290                         prt_names(pix->field, v4l2_field_names),
 291                         pix->bytesperline, pix->sizeimage,
 292                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 293                         pix->quantization, pix->xfer_func);
 294                 break;
 295         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 296         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 297                 mp = &p->fmt.pix_mp;
 298                 pixelformat = mp->pixelformat;
 299                 pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 300                         mp->width, mp->height, &pixelformat,
 301                         prt_names(mp->field, v4l2_field_names),
 302                         mp->colorspace, mp->num_planes, mp->flags,
 303                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 304                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 305                 for (i = 0; i < planes; i++)
 306                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 307                                         mp->plane_fmt[i].bytesperline,
 308                                         mp->plane_fmt[i].sizeimage);
 309                 break;
 310         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 311         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 312                 win = &p->fmt.win;
 313                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, global_alpha=0x%02x\n",
 314                         win->w.width, win->w.height, win->w.left, win->w.top,
 315                         prt_names(win->field, v4l2_field_names),
 316                         win->chromakey, win->global_alpha);
 317                 break;
 318         case V4L2_BUF_TYPE_VBI_CAPTURE:
 319         case V4L2_BUF_TYPE_VBI_OUTPUT:
 320                 vbi = &p->fmt.vbi;
 321                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
 322                         vbi->sampling_rate, vbi->offset,
 323                         vbi->samples_per_line, &vbi->sample_format,
 324                         vbi->start[0], vbi->start[1],
 325                         vbi->count[0], vbi->count[1]);
 326                 break;
 327         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 328         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 329                 sliced = &p->fmt.sliced;
 330                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 331                                 sliced->service_set, sliced->io_size);
 332                 for (i = 0; i < 24; i++)
 333                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 334                                 sliced->service_lines[0][i],
 335                                 sliced->service_lines[1][i]);
 336                 break;
 337         case V4L2_BUF_TYPE_SDR_CAPTURE:
 338         case V4L2_BUF_TYPE_SDR_OUTPUT:
 339                 pixelformat = p->fmt.sdr.pixelformat;
 340                 pr_cont(", pixelformat=%p4cc\n", &pixelformat);
 341                 break;
 342         case V4L2_BUF_TYPE_META_CAPTURE:
 343         case V4L2_BUF_TYPE_META_OUTPUT:
 344                 meta = &p->fmt.meta;
 345                 pixelformat = meta->dataformat;
 346                 pr_cont(", dataformat=%p4cc, buffersize=%u, width=%u, height=%u, bytesperline=%u\n",
 347                         &pixelformat, meta->buffersize, meta->width,
 348                         meta->height, meta->bytesperline);
 349                 break;
 350         }
 351 }
 352
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 501 static void v4l_print_streamparm(const void *arg, bool write_only)
 502 {
 503         const struct v4l2_streamparm *p = arg;
 504
 505         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 506
 507         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 508             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 509                 const struct v4l2_captureparm *c = &p->parm.capture;
 510
 511                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 512                         c->capability, c->capturemode,
 513                         c->timeperframe.numerator, c->timeperframe.denominator,
 514                         c->extendedmode, c->readbuffers);
 515         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 516                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 517                 const struct v4l2_outputparm *c = &p->parm.output;
 518
 519                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 520                         c->capability, c->outputmode,
 521                         c->timeperframe.numerator, c->timeperframe.denominator,
 522                         c->extendedmode, c->writebuffers);
 523         } else {
 524                 pr_cont("\n");
 525         }
 526 }
 527
 528 static void v4l_print_queryctrl(const void *arg, bool write_only)
 529 {
 530         const struct v4l2_queryctrl *p = arg;
 531
 532         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 533                         p->id, p->type, (int)sizeof(p->name), p->name,
 534                         p->minimum, p->maximum,
 535                         p->step, p->default_value, p->flags);
 536 }
 537
 538 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 539 {
 540         const struct v4l2_query_ext_ctrl *p = arg;
 541
 542         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 543                         p->id, p->type, (int)sizeof(p->name), p->name,
 544                         p->minimum, p->maximum,
 545                         p->step, p->default_value, p->flags,
 546                         p->elem_size, p->elems, p->nr_of_dims,
 547                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 548 }
 549
 550 static void v4l_print_querymenu(const void *arg, bool write_only)
 551 {
 552         const struct v4l2_querymenu *p = arg;
 553
 554         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 555 }
 556
 557 static void v4l_print_control(const void *arg, bool write_only)
 558 {
 559         const struct v4l2_control *p = arg;
 560         const char *name = v4l2_ctrl_get_name(p->id);
 561
 562         if (name)
 563                 pr_cont("name=%s, ", name);
 564         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 565 }
 566
 567 static void v4l_print_ext_controls(const void *arg, bool write_only)
 568 {
 569         const struct v4l2_ext_controls *p = arg;
 570         int i;
 571
 572         pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 573                         p->which, p->count, p->error_idx, p->request_fd);
 574         for (i = 0; i < p->count; i++) {
 575                 unsigned int id = p->controls[i].id;
 576                 const char *name = v4l2_ctrl_get_name(id);
 577
 578                 if (name)
 579                         pr_cont(", name=%s", name);
 580                 if (!p->controls[i].size)
 581                         pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
 582                 else
 583                         pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
 584         }
 585         pr_cont("\n");
 586 }
 587
 588 static void v4l_print_cropcap(const void *arg, bool write_only)
 589 {
 590         const struct v4l2_cropcap *p = arg;
 591
 592         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 593                 prt_names(p->type, v4l2_type_names),
 594                 p->bounds.width, p->bounds.height,
 595                 p->bounds.left, p->bounds.top,
 596                 p->defrect.width, p->defrect.height,
 597                 p->defrect.left, p->defrect.top,
 598                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 599 }
 600
 601 static void v4l_print_crop(const void *arg, bool write_only)
 602 {
 603         const struct v4l2_crop *p = arg;
 604
 605         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 606                 prt_names(p->type, v4l2_type_names),
 607                 p->c.width, p->c.height,
 608                 p->c.left, p->c.top);
 609 }
 610
 611 static void v4l_print_selection(const void *arg, bool write_only)
 612 {
 613         const struct v4l2_selection *p = arg;
 614
 615         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 616                 prt_names(p->type, v4l2_type_names),
 617                 p->target, p->flags,
 618                 p->r.width, p->r.height, p->r.left, p->r.top);
 619 }
 620
 621 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 622 {
 623         const struct v4l2_jpegcompression *p = arg;
 624
 625         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 626                 p->quality, p->APPn, p->APP_len,
 627                 p->COM_len, p->jpeg_markers);
 628 }
 629
 630 static void v4l_print_enc_idx(const void *arg, bool write_only)
 631 {
 632         const struct v4l2_enc_idx *p = arg;
 633
 634         pr_cont("entries=%d, entries_cap=%d\n",
 635                         p->entries, p->entries_cap);
 636 }
 637
 638 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 639 {
 640         const struct v4l2_encoder_cmd *p = arg;
 641
 642         pr_cont("cmd=%d, flags=0x%x\n",
 643                         p->cmd, p->flags);
 644 }
 645
 646 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 647 {
 648         const struct v4l2_decoder_cmd *p = arg;
 649
 650         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 651
 652         if (p->cmd == V4L2_DEC_CMD_START)
 653                 pr_info("speed=%d, format=%u\n",
 654                                 p->start.speed, p->start.format);
 655         else if (p->cmd == V4L2_DEC_CMD_STOP)
 656                 pr_info("pts=%llu\n", p->stop.pts);
 657 }
 658
 659 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 660 {
 661         const struct v4l2_dbg_chip_info *p = arg;
 662
 663         pr_cont("type=%u, ", p->match.type);
 664         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 665                 pr_cont("name=%.*s, ",
 666                                 (int)sizeof(p->match.name), p->match.name);
 667         else
 668                 pr_cont("addr=%u, ", p->match.addr);
 669         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 670 }
 671
 672 static void v4l_print_dbg_register(const void *arg, bool write_only)
 673 {
 674         const struct v4l2_dbg_register *p = arg;
 675
 676         pr_cont("type=%u, ", p->match.type);
 677         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 678                 pr_cont("name=%.*s, ",
 679                                 (int)sizeof(p->match.name), p->match.name);
 680         else
 681                 pr_cont("addr=%u, ", p->match.addr);
 682         pr_cont("reg=0x%llx, val=0x%llx\n",
 683                         p->reg, p->val);
 684 }
 685
 686 static void v4l_print_dv_timings(const void *arg, bool write_only)
 687 {
 688         const struct v4l2_dv_timings *p = arg;
 689
 690         switch (p->type) {
 691         case V4L2_DV_BT_656_1120:
 692                 pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 693                                 p->bt.interlaced, p->bt.pixelclock,
 694                                 p->bt.width, p->bt.height,
 695                                 p->bt.polarities, p->bt.hfrontporch,
 696                                 p->bt.hsync, p->bt.hbackporch,
 697                                 p->bt.vfrontporch, p->bt.vsync,
 698                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 699                                 p->bt.il_vsync, p->bt.il_vbackporch,
 700                                 p->bt.standards, p->bt.flags);
 701                 break;
 702         default:
 703                 pr_cont("type=%d\n", p->type);
 704                 break;
 705         }
 706 }
 707
 708 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 709 {
 710         const struct v4l2_enum_dv_timings *p = arg;
 711
 712         pr_cont("index=%u, ", p->index);
 713         v4l_print_dv_timings(&p->timings, write_only);
 714 }
 715
 716 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 717 {
 718         const struct v4l2_dv_timings_cap *p = arg;
 719
 720         switch (p->type) {
 721         case V4L2_DV_BT_656_1120:
 722                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 723                         p->bt.min_width, p->bt.max_width,
 724                         p->bt.min_height, p->bt.max_height,
 725                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 726                         p->bt.standards, p->bt.capabilities);
 727                 break;
 728         default:
 729                 pr_cont("type=%u\n", p->type);
 730                 break;
 731         }
 732 }
 733
 734 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 735 {
 736         const struct v4l2_frmsizeenum *p = arg;
 737
 738         pr_cont("index=%u, pixelformat=%p4cc, type=%u",
 739                 p->index, &p->pixel_format, p->type);
 740         switch (p->type) {
 741         case V4L2_FRMSIZE_TYPE_DISCRETE:
 742                 pr_cont(", wxh=%ux%u\n",
 743                         p->discrete.width, p->discrete.height);
 744                 break;
 745         case V4L2_FRMSIZE_TYPE_STEPWISE:
 746                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 747                                 p->stepwise.min_width,
 748                                 p->stepwise.min_height,
 749                                 p->stepwise.max_width,
 750                                 p->stepwise.max_height,
 751                                 p->stepwise.step_width,
 752                                 p->stepwise.step_height);
 753                 break;
 754         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 755         default:
 756                 pr_cont("\n");
 757                 break;
 758         }
 759 }
 760
 761 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 762 {
 763         const struct v4l2_frmivalenum *p = arg;
 764
 765         pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
 766                 p->index, &p->pixel_format, p->width, p->height, p->type);
 767         switch (p->type) {
 768         case V4L2_FRMIVAL_TYPE_DISCRETE:
 769                 pr_cont(", fps=%d/%d\n",
 770                                 p->discrete.numerator,
 771                                 p->discrete.denominator);
 772                 break;
 773         case V4L2_FRMIVAL_TYPE_STEPWISE:
 774                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 775                                 p->stepwise.min.numerator,
 776                                 p->stepwise.min.denominator,
 777                                 p->stepwise.max.numerator,
 778                                 p->stepwise.max.denominator,
 779                                 p->stepwise.step.numerator,
 780                                 p->stepwise.step.denominator);
 781                 break;
 782         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 783         default:
 784                 pr_cont("\n");
 785                 break;
 786         }
 787 }
 788
 789 static void v4l_print_event(const void *arg, bool write_only)
 790 {
 791         const struct v4l2_event *p = arg;
 792         const struct v4l2_event_ctrl *c;
 793
 794         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 795                         p->type, p->pending, p->sequence, p->id,
 796                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 797         switch (p->type) {
 798         case V4L2_EVENT_VSYNC:
 799                 printk(KERN_DEBUG "field=%s\n",
 800                         prt_names(p->u.vsync.field, v4l2_field_names));
 801                 break;
 802         case V4L2_EVENT_CTRL:
 803                 c = &p->u.ctrl;
 804                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 805                         c->changes, c->type);
 806                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 807                         pr_cont("value64=%lld, ", c->value64);
 808                 else
 809                         pr_cont("value=%d, ", c->value);
 810                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 811                         c->flags, c->minimum, c->maximum,
 812                         c->step, c->default_value);
 813                 break;
 814         case V4L2_EVENT_FRAME_SYNC:
 815                 pr_cont("frame_sequence=%u\n",
 816                         p->u.frame_sync.frame_sequence);
 817                 break;
 818         }
 819 }
 820
 821 static void v4l_print_event_subscription(const void *arg, bool write_only)
 822 {
 823         const struct v4l2_event_subscription *p = arg;
 824
 825         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 826                         p->type, p->id, p->flags);
 827 }
 828
 829 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 830 {
 831         const struct v4l2_sliced_vbi_cap *p = arg;
 832         int i;
 833
 834         pr_cont("type=%s, service_set=0x%08x\n",
 835                         prt_names(p->type, v4l2_type_names), p->service_set);
 836         for (i = 0; i < 24; i++)
 837                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 838                                 p->service_lines[0][i],
 839                                 p->service_lines[1][i]);
 840 }
 841
 842 static void v4l_print_freq_band(const void *arg, bool write_only)
 843 {
 844         const struct v4l2_frequency_band *p = arg;
 845
 846         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 847                         p->tuner, p->type, p->index,
 848                         p->capability, p->rangelow,
 849                         p->rangehigh, p->modulation);
 850 }
 851
 852 static void v4l_print_edid(const void *arg, bool write_only)
 853 {
 854         const struct v4l2_edid *p = arg;
 855
 856         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 857                 p->pad, p->start_block, p->blocks);
 858 }
 859
 860 static void v4l_print_u32(const void *arg, bool write_only)
 861 {
 862         pr_cont("value=%u\n", *(const u32 *)arg);
 863 }
 864
 865 static void v4l_print_newline(const void *arg, bool write_only)
 866 {
 867         pr_cont("\n");
 868 }
 869
 870 static void v4l_print_default(const void *arg, bool write_only)
 871 {
 872         pr_cont("driver-specific ioctl\n");
 873 }
 874
 875 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
 876 {
 877         __u32 i;
 878
 879         /* zero the reserved fields */
 880         c->reserved[0] = 0;
 881         for (i = 0; i < c->count; i++)
 882                 c->controls[i].reserved2[0] = 0;
 883
 884         switch (c->which) {
 885         case V4L2_CID_PRIVATE_BASE:
 886                 /*
 887                  * V4L2_CID_PRIVATE_BASE cannot be used as control class
 888                  * when using extended controls.
 889                  * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 890                  * is it allowed for backwards compatibility.
 891                  */
 892                 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
 893                         return false;
 894                 break;
 895         case V4L2_CTRL_WHICH_DEF_VAL:
 896                 /* Default value cannot be changed */
 897                 if (ioctl == VIDIOC_S_EXT_CTRLS ||
 898                     ioctl == VIDIOC_TRY_EXT_CTRLS) {
 899                         c->error_idx = c->count;
 900                         return false;
 901                 }
 902                 return true;
 903         case V4L2_CTRL_WHICH_CUR_VAL:
 904                 return true;
 905         case V4L2_CTRL_WHICH_REQUEST_VAL:
 906                 c->error_idx = c->count;
 907                 return false;
 908         }
 909
 910         /* Check that all controls are from the same control class. */
 911         for (i = 0; i < c->count; i++) {
 912                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 913                         c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
 914                                                                       c->count;
 915                         return false;
 916                 }
 917         }
 918         return true;
 919 }
 920
 921 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 922 {
 923         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 924                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 925                              V4L2_CAP_VIDEO_OUTPUT |
 926                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 927                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 928         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 929                               V4L2_CAP_META_OUTPUT;
 930         struct video_device *vfd = video_devdata(file);
 931         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 932         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 933                       (vfd->device_caps & vid_caps);
 934         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 935         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 936         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 937         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 938                        (vfd->device_caps & meta_caps);
 939         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 940         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 941
 942         if (ops == NULL)
 943                 return -EINVAL;
 944
 945         switch (type) {
 946         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 947                 if ((is_vid || is_tch) && is_rx &&
 948                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 949                         return 0;
 950                 break;
 951         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 952                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 953                         return 0;
 954                 break;
 955         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 956                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 957                         return 0;
 958                 break;
 959         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 960                 if (is_vid && is_tx &&
 961                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 962                         return 0;
 963                 break;
 964         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 965                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 966                         return 0;
 967                 break;
 968         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 969                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 970                         return 0;
 971                 break;
 972         case V4L2_BUF_TYPE_VBI_CAPTURE:
 973                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 974                         return 0;
 975                 break;
 976         case V4L2_BUF_TYPE_VBI_OUTPUT:
 977                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 978                         return 0;
 979                 break;
 980         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 981                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 982                         return 0;
 983                 break;
 984         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 985                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 986                         return 0;
 987                 break;
 988         case V4L2_BUF_TYPE_SDR_CAPTURE:
 989                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 990                         return 0;
 991                 break;
 992         case V4L2_BUF_TYPE_SDR_OUTPUT:
 993                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 994                         return 0;
 995                 break;
 996         case V4L2_BUF_TYPE_META_CAPTURE:
 997                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
 998                         return 0;
 999                 break;
1000         case V4L2_BUF_TYPE_META_OUTPUT:
1001                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
1002                         return 0;
1003                 break;
1004         default:
1005                 break;
1006         }
1007         return -EINVAL;
1008 }
1009
1010 static void v4l_sanitize_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
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
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
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
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
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
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
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
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
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
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
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_Y16I:         descr = "Interleaved 16-bit Greyscale"; break;
1331         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1332         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1333         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1334         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1335         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1336         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1337         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1338         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1339         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1340         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1341         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1342         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1343         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1344         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1345         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1346         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1347         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1348         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1349         case V4L2_PIX_FMT_YUV24:        descr = "24-bit YUV 4:4:4 8-8-8"; break;
1350         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1351         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1352         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1353         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1354         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1355         case V4L2_PIX_FMT_YUVA32:       descr = "32-bit YUVA 8-8-8-8"; break;
1356         case V4L2_PIX_FMT_YUVX32:       descr = "32-bit YUVX 8-8-8-8"; break;
1357         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1358         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1359         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1360         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1361         case V4L2_PIX_FMT_YUV48_12:     descr = "12-bit YUV 4:4:4 Packed"; break;
1362         case V4L2_PIX_FMT_NV12:         descr = "Y/UV 4:2:0"; break;
1363         case V4L2_PIX_FMT_NV21:         descr = "Y/VU 4:2:0"; break;
1364         case V4L2_PIX_FMT_NV16:         descr = "Y/UV 4:2:2"; break;
1365         case V4L2_PIX_FMT_NV61:         descr = "Y/VU 4:2:2"; break;
1366         case V4L2_PIX_FMT_NV24:         descr = "Y/UV 4:4:4"; break;
1367         case V4L2_PIX_FMT_NV42:         descr = "Y/VU 4:4:4"; break;
1368         case V4L2_PIX_FMT_P010:         descr = "10-bit Y/UV 4:2:0"; break;
1369         case V4L2_PIX_FMT_P012:         descr = "12-bit Y/UV 4:2:0"; break;
1370         case V4L2_PIX_FMT_NV12_4L4:     descr = "Y/UV 4:2:0 (4x4 Linear)"; break;
1371         case V4L2_PIX_FMT_NV12_16L16:   descr = "Y/UV 4:2:0 (16x16 Linear)"; break;
1372         case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/UV 4:2:0 (32x32 Linear)"; break;
1373         case V4L2_PIX_FMT_NV15_4L4:     descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
1374         case V4L2_PIX_FMT_P010_4L4:     descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
1375         case V4L2_PIX_FMT_NV12M:        descr = "Y/UV 4:2:0 (N-C)"; break;
1376         case V4L2_PIX_FMT_NV21M:        descr = "Y/VU 4:2:0 (N-C)"; break;
1377         case V4L2_PIX_FMT_NV16M:        descr = "Y/UV 4:2:2 (N-C)"; break;
1378         case V4L2_PIX_FMT_NV61M:        descr = "Y/VU 4:2:2 (N-C)"; break;
1379         case V4L2_PIX_FMT_NV12MT:       descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break;
1380         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break;
1381         case V4L2_PIX_FMT_P012M:        descr = "12-bit Y/UV 4:2:0 (N-C)"; break;
1382         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1383         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1384         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1385         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1386         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1387         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1388         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1389         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1390         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1391         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1392         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1393         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1394         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1395         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1396         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1397         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1398         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1399         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1400         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1401         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1402         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1403         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1404         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1405         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1406         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1407         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1408         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1409         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1410         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1411         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1412         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1413         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1414         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1415         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1416         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1417         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1418         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1419         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1420         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1421         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1422         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1423         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1424         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1425         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1426         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1427         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1428         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1429         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1430         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1431         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1432         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1433         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1434         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1435         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1436         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1437         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1438         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1439         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1440         case V4L2_PIX_FMT_MM21:         descr = "Mediatek 8-bit Block Format"; break;
1441         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1442         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1443         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1444         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1445         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1446         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1447         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1448         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1449         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1450         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1451         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1452         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1453         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1454         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1455         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1456         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1457         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1458         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1459         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1460         case V4L2_META_FMT_RK_ISP1_PARAMS:      descr = "Rockchip ISP1 3A Parameters"; break;
1461         case V4L2_META_FMT_RK_ISP1_STAT_3A:     descr = "Rockchip ISP1 3A Statistics"; break;
1462         case V4L2_META_FMT_RK_ISP1_EXT_PARAMS:  descr = "Rockchip ISP1 Ext 3A Params"; break;
1463         case V4L2_PIX_FMT_NV12_8L128:   descr = "NV12 (8x128 Linear)"; break;
1464         case V4L2_PIX_FMT_NV12M_8L128:  descr = "NV12M (8x128 Linear)"; break;
1465         case V4L2_PIX_FMT_NV12_10BE_8L128:      descr = "10-bit NV12 (8x128 Linear, BE)"; break;
1466         case V4L2_PIX_FMT_NV12M_10BE_8L128:     descr = "10-bit NV12M (8x128 Linear, BE)"; break;
1467         case V4L2_PIX_FMT_Y210:         descr = "10-bit YUYV Packed"; break;
1468         case V4L2_PIX_FMT_Y212:         descr = "12-bit YUYV Packed"; break;
1469         case V4L2_PIX_FMT_Y216:         descr = "16-bit YUYV Packed"; break;
1470         case V4L2_META_FMT_RPI_BE_CFG:  descr = "RPi PiSP BE Config format"; break;
1471         case V4L2_META_FMT_RPI_FE_CFG:  descr = "RPi PiSP FE Config format"; break;
1472         case V4L2_META_FMT_RPI_FE_STATS: descr = "RPi PiSP FE Statistics format"; break;
1473         case V4L2_META_FMT_GENERIC_8:   descr = "8-bit Generic Metadata"; break;
1474         case V4L2_META_FMT_GENERIC_CSI2_10:     descr = "8-bit Generic Meta, 10b CSI-2"; break;
1475         case V4L2_META_FMT_GENERIC_CSI2_12:     descr = "8-bit Generic Meta, 12b CSI-2"; break;
1476         case V4L2_META_FMT_GENERIC_CSI2_14:     descr = "8-bit Generic Meta, 14b CSI-2"; break;
1477         case V4L2_META_FMT_GENERIC_CSI2_16:     descr = "8-bit Generic Meta, 16b CSI-2"; break;
1478         case V4L2_META_FMT_GENERIC_CSI2_20:     descr = "8-bit Generic Meta, 20b CSI-2"; break;
1479         case V4L2_META_FMT_GENERIC_CSI2_24:     descr = "8-bit Generic Meta, 24b CSI-2"; break;
1480
1481         default:
1482                 /* Compressed formats */
1483                 flags = V4L2_FMT_FLAG_COMPRESSED;
1484                 switch (fmt->pixelformat) {
1485                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1486                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1487                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1488                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1489                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1490                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1491                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1492                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1493                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1494                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1495                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1496                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1497                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1498                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1499                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1500                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1501                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1502                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1503                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1504                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1505                 case V4L2_PIX_FMT_VP9_FRAME:    descr = "VP9 Frame"; break;
1506                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1507                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1508                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1509                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1510                 case V4L2_PIX_FMT_SPK:          descr = "Sorenson Spark"; break;
1511                 case V4L2_PIX_FMT_RV30:         descr = "RealVideo 8"; break;
1512                 case V4L2_PIX_FMT_RV40:         descr = "RealVideo 9 & 10"; break;
1513                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1514                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1515                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1516                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1517                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1518                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1519                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1520                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1521                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1522                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1523                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1524                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1525                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1526                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1527                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1528                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1529                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1530                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1531                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1532                 case V4L2_PIX_FMT_QC08C:        descr = "QCOM Compressed 8-bit Format"; break;
1533                 case V4L2_PIX_FMT_QC10C:        descr = "QCOM Compressed 10-bit Format"; break;
1534                 case V4L2_PIX_FMT_AJPG:         descr = "Aspeed JPEG"; break;
1535                 case V4L2_PIX_FMT_AV1_FRAME:    descr = "AV1 Frame"; break;
1536                 case V4L2_PIX_FMT_MT2110T:      descr = "Mediatek 10bit Tile Mode"; break;
1537                 case V4L2_PIX_FMT_MT2110R:      descr = "Mediatek 10bit Raster Mode"; break;
1538                 case V4L2_PIX_FMT_HEXTILE:      descr = "Hextile Compressed Format"; break;
1539                 case V4L2_PIX_FMT_PISP_COMP1_RGGB: descr = "PiSP 8b RGRG/GBGB mode1 compr"; break;
1540                 case V4L2_PIX_FMT_PISP_COMP1_GRBG: descr = "PiSP 8b GRGR/BGBG mode1 compr"; break;
1541                 case V4L2_PIX_FMT_PISP_COMP1_GBRG: descr = "PiSP 8b GBGB/RGRG mode1 compr"; break;
1542                 case V4L2_PIX_FMT_PISP_COMP1_BGGR: descr = "PiSP 8b BGBG/GRGR mode1 compr"; break;
1543                 case V4L2_PIX_FMT_PISP_COMP1_MONO: descr = "PiSP 8b monochrome mode1 compr"; break;
1544                 case V4L2_PIX_FMT_PISP_COMP2_RGGB: descr = "PiSP 8b RGRG/GBGB mode2 compr"; break;
1545                 case V4L2_PIX_FMT_PISP_COMP2_GRBG: descr = "PiSP 8b GRGR/BGBG mode2 compr"; break;
1546                 case V4L2_PIX_FMT_PISP_COMP2_GBRG: descr = "PiSP 8b GBGB/RGRG mode2 compr"; break;
1547                 case V4L2_PIX_FMT_PISP_COMP2_BGGR: descr = "PiSP 8b BGBG/GRGR mode2 compr"; break;
1548                 case V4L2_PIX_FMT_PISP_COMP2_MONO: descr = "PiSP 8b monochrome mode2 compr"; break;
1549                 default:
1550                         if (fmt->description[0])
1551                                 return;
1552                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1553                         flags = 0;
1554                         snprintf(fmt->description, sz, "%p4cc",
1555                                  &fmt->pixelformat);
1556                         break;
1557                 }
1558         }
1559
1560         if (fmt->type == V4L2_BUF_TYPE_META_CAPTURE) {
1561                 switch (fmt->pixelformat) {
1562                 case V4L2_META_FMT_GENERIC_8:
1563                 case V4L2_META_FMT_GENERIC_CSI2_10:
1564                 case V4L2_META_FMT_GENERIC_CSI2_12:
1565                 case V4L2_META_FMT_GENERIC_CSI2_14:
1566                 case V4L2_META_FMT_GENERIC_CSI2_16:
1567                 case V4L2_META_FMT_GENERIC_CSI2_20:
1568                 case V4L2_META_FMT_GENERIC_CSI2_24:
1569                         fmt->flags |= V4L2_FMT_FLAG_META_LINE_BASED;
1570                         break;
1571                 default:
1572                         fmt->flags &= ~V4L2_FMT_FLAG_META_LINE_BASED;
1573                 }
1574         }
1575
1576         if (descr)
1577                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1578         fmt->flags |= flags;
1579 }
1580
1581 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1582                                 struct file *file, void *fh, void *arg)
1583 {
1584         struct video_device *vdev = video_devdata(file);
1585         struct v4l2_fmtdesc *p = arg;
1586         int ret = check_fmt(file, p->type);
1587         u32 mbus_code;
1588         u32 cap_mask;
1589
1590         if (ret)
1591                 return ret;
1592         ret = -EINVAL;
1593
1594         if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1595                 p->mbus_code = 0;
1596
1597         mbus_code = p->mbus_code;
1598         memset_after(p, 0, type);
1599         p->mbus_code = mbus_code;
1600
1601         switch (p->type) {
1602         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1603         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1604                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1605                            V4L2_CAP_VIDEO_M2M_MPLANE;
1606                 if (!!(vdev->device_caps & cap_mask) !=
1607                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1608                         break;
1609
1610                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1611                         break;
1612                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1613                 break;
1614         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1615                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1616                         break;
1617                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1618                 break;
1619         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1620         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1621                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1622                            V4L2_CAP_VIDEO_M2M_MPLANE;
1623                 if (!!(vdev->device_caps & cap_mask) !=
1624                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1625                         break;
1626
1627                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1628                         break;
1629                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1630                 break;
1631         case V4L2_BUF_TYPE_SDR_CAPTURE:
1632                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1633                         break;
1634                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1635                 break;
1636         case V4L2_BUF_TYPE_SDR_OUTPUT:
1637                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1638                         break;
1639                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1640                 break;
1641         case V4L2_BUF_TYPE_META_CAPTURE:
1642                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1643                         break;
1644                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1645                 break;
1646         case V4L2_BUF_TYPE_META_OUTPUT:
1647                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1648                         break;
1649                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1650                 break;
1651         }
1652         if (ret == 0)
1653                 v4l_fill_fmtdesc(p);
1654         return ret;
1655 }
1656
1657 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1658 {
1659         /*
1660          * The v4l2_pix_format structure contains fields that make no sense for
1661          * touch. Set them to default values in this case.
1662          */
1663
1664         p->field = V4L2_FIELD_NONE;
1665         p->colorspace = V4L2_COLORSPACE_RAW;
1666         p->flags = 0;
1667         p->ycbcr_enc = 0;
1668         p->quantization = 0;
1669         p->xfer_func = 0;
1670 }
1671
1672 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1673                                 struct file *file, void *fh, void *arg)
1674 {
1675         struct v4l2_format *p = arg;
1676         struct video_device *vfd = video_devdata(file);
1677         int ret = check_fmt(file, p->type);
1678
1679         if (ret)
1680                 return ret;
1681
1682         memset(&p->fmt, 0, sizeof(p->fmt));
1683
1684         switch (p->type) {
1685         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1686                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1687                         break;
1688                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1689                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1690                 /* just in case the driver zeroed it again */
1691                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1692                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1693                         v4l_pix_format_touch(&p->fmt.pix);
1694                 return ret;
1695         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1696                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1697         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1698                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1699         case V4L2_BUF_TYPE_VBI_CAPTURE:
1700                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1701         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1702                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1703         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1704                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1705                         break;
1706                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1707                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1708                 /* just in case the driver zeroed it again */
1709                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1710                 return ret;
1711         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1712                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1713         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1714                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1715         case V4L2_BUF_TYPE_VBI_OUTPUT:
1716                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1717         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1718                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1719         case V4L2_BUF_TYPE_SDR_CAPTURE:
1720                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1721         case V4L2_BUF_TYPE_SDR_OUTPUT:
1722                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1723         case V4L2_BUF_TYPE_META_CAPTURE:
1724                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1725         case V4L2_BUF_TYPE_META_OUTPUT:
1726                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1727         }
1728         return -EINVAL;
1729 }
1730
1731 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1732                                 struct file *file, void *fh, void *arg)
1733 {
1734         struct v4l2_format *p = arg;
1735         struct video_device *vfd = video_devdata(file);
1736         int ret = check_fmt(file, p->type);
1737         unsigned int i;
1738
1739         if (ret)
1740                 return ret;
1741
1742         ret = v4l_enable_media_source(vfd);
1743         if (ret)
1744                 return ret;
1745         v4l_sanitize_format(p);
1746
1747         switch (p->type) {
1748         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1749                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1750                         break;
1751                 memset_after(p, 0, fmt.pix);
1752                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1753                 /* just in case the driver zeroed it again */
1754                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1755                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1756                         v4l_pix_format_touch(&p->fmt.pix);
1757                 return ret;
1758         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1759                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1760                         break;
1761                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1762                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1763                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1764                                      0, bytesperline);
1765                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1766         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1767                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1768                         break;
1769                 memset_after(p, 0, fmt.win);
1770                 p->fmt.win.clips = NULL;
1771                 p->fmt.win.clipcount = 0;
1772                 p->fmt.win.bitmap = NULL;
1773                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1774         case V4L2_BUF_TYPE_VBI_CAPTURE:
1775                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1776                         break;
1777                 memset_after(p, 0, fmt.vbi.flags);
1778                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1779         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1780                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1781                         break;
1782                 memset_after(p, 0, fmt.sliced.io_size);
1783                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1784         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1785                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1786                         break;
1787                 memset_after(p, 0, fmt.pix);
1788                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1789                 /* just in case the driver zeroed it again */
1790                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1791                 return ret;
1792         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1793                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1794                         break;
1795                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1796                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1797                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1798                                      0, bytesperline);
1799                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1800         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1801                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1802                         break;
1803                 memset_after(p, 0, fmt.win);
1804                 p->fmt.win.clips = NULL;
1805                 p->fmt.win.clipcount = 0;
1806                 p->fmt.win.bitmap = NULL;
1807                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1808         case V4L2_BUF_TYPE_VBI_OUTPUT:
1809                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1810                         break;
1811                 memset_after(p, 0, fmt.vbi.flags);
1812                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1813         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1814                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1815                         break;
1816                 memset_after(p, 0, fmt.sliced.io_size);
1817                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1818         case V4L2_BUF_TYPE_SDR_CAPTURE:
1819                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1820                         break;
1821                 memset_after(p, 0, fmt.sdr.buffersize);
1822                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1823         case V4L2_BUF_TYPE_SDR_OUTPUT:
1824                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1825                         break;
1826                 memset_after(p, 0, fmt.sdr.buffersize);
1827                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1828         case V4L2_BUF_TYPE_META_CAPTURE:
1829                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1830                         break;
1831                 memset_after(p, 0, fmt.meta);
1832                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1833         case V4L2_BUF_TYPE_META_OUTPUT:
1834                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1835                         break;
1836                 memset_after(p, 0, fmt.meta);
1837                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1838         }
1839         return -EINVAL;
1840 }
1841
1842 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1843                                 struct file *file, void *fh, void *arg)
1844 {
1845         struct v4l2_format *p = arg;
1846         struct video_device *vfd = video_devdata(file);
1847         int ret = check_fmt(file, p->type);
1848         unsigned int i;
1849
1850         if (ret)
1851                 return ret;
1852
1853         v4l_sanitize_format(p);
1854
1855         switch (p->type) {
1856         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1857                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1858                         break;
1859                 memset_after(p, 0, fmt.pix);
1860                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1861                 /* just in case the driver zeroed it again */
1862                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1863                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1864                         v4l_pix_format_touch(&p->fmt.pix);
1865                 return ret;
1866         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1867                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1868                         break;
1869                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1870                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1871                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1872                                      0, bytesperline);
1873                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1874         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1875                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1876                         break;
1877                 memset_after(p, 0, fmt.win);
1878                 p->fmt.win.clips = NULL;
1879                 p->fmt.win.clipcount = 0;
1880                 p->fmt.win.bitmap = NULL;
1881                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1882         case V4L2_BUF_TYPE_VBI_CAPTURE:
1883                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1884                         break;
1885                 memset_after(p, 0, fmt.vbi.flags);
1886                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1887         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1888                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1889                         break;
1890                 memset_after(p, 0, fmt.sliced.io_size);
1891                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1892         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1893                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1894                         break;
1895                 memset_after(p, 0, fmt.pix);
1896                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1897                 /* just in case the driver zeroed it again */
1898                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1899                 return ret;
1900         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1901                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1902                         break;
1903                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1904                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1905                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1906                                      0, bytesperline);
1907                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1908         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1909                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1910                         break;
1911                 memset_after(p, 0, fmt.win);
1912                 p->fmt.win.clips = NULL;
1913                 p->fmt.win.clipcount = 0;
1914                 p->fmt.win.bitmap = NULL;
1915                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1916         case V4L2_BUF_TYPE_VBI_OUTPUT:
1917                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1918                         break;
1919                 memset_after(p, 0, fmt.vbi.flags);
1920                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1921         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1922                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1923                         break;
1924                 memset_after(p, 0, fmt.sliced.io_size);
1925                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1926         case V4L2_BUF_TYPE_SDR_CAPTURE:
1927                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1928                         break;
1929                 memset_after(p, 0, fmt.sdr.buffersize);
1930                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1931         case V4L2_BUF_TYPE_SDR_OUTPUT:
1932                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1933                         break;
1934                 memset_after(p, 0, fmt.sdr.buffersize);
1935                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1936         case V4L2_BUF_TYPE_META_CAPTURE:
1937                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1938                         break;
1939                 memset_after(p, 0, fmt.meta);
1940                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1941         case V4L2_BUF_TYPE_META_OUTPUT:
1942                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1943                         break;
1944                 memset_after(p, 0, fmt.meta);
1945                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1946         }
1947         return -EINVAL;
1948 }
1949
1950 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1951                                 struct file *file, void *fh, void *arg)
1952 {
1953         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1954 }
1955
1956 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1957                                 struct file *file, void *fh, void *arg)
1958 {
1959         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1960 }
1961
1962 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1963                                 struct file *file, void *fh, void *arg)
1964 {
1965         struct video_device *vfd = video_devdata(file);
1966         struct v4l2_tuner *p = arg;
1967         int err;
1968
1969         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1970                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1971         err = ops->vidioc_g_tuner(file, fh, p);
1972         if (!err)
1973                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1974         return err;
1975 }
1976
1977 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1978                                 struct file *file, void *fh, void *arg)
1979 {
1980         struct video_device *vfd = video_devdata(file);
1981         struct v4l2_tuner *p = arg;
1982         int ret;
1983
1984         ret = v4l_enable_media_source(vfd);
1985         if (ret)
1986                 return ret;
1987         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1988                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1989         return ops->vidioc_s_tuner(file, fh, p);
1990 }
1991
1992 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1993                                 struct file *file, void *fh, void *arg)
1994 {
1995         struct video_device *vfd = video_devdata(file);
1996         struct v4l2_modulator *p = arg;
1997         int err;
1998
1999         if (vfd->vfl_type == VFL_TYPE_RADIO)
2000                 p->type = V4L2_TUNER_RADIO;
2001
2002         err = ops->vidioc_g_modulator(file, fh, p);
2003         if (!err)
2004                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
2005         return err;
2006 }
2007
2008 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
2009                                 struct file *file, void *fh, void *arg)
2010 {
2011         struct video_device *vfd = video_devdata(file);
2012         struct v4l2_modulator *p = arg;
2013
2014         if (vfd->vfl_type == VFL_TYPE_RADIO)
2015                 p->type = V4L2_TUNER_RADIO;
2016
2017         return ops->vidioc_s_modulator(file, fh, p);
2018 }
2019
2020 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
2021                                 struct file *file, void *fh, void *arg)
2022 {
2023         struct video_device *vfd = video_devdata(file);
2024         struct v4l2_frequency *p = arg;
2025
2026         if (vfd->vfl_type == VFL_TYPE_SDR)
2027                 p->type = V4L2_TUNER_SDR;
2028         else
2029                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2030                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2031         return ops->vidioc_g_frequency(file, fh, p);
2032 }
2033
2034 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
2035                                 struct file *file, void *fh, void *arg)
2036 {
2037         struct video_device *vfd = video_devdata(file);
2038         const struct v4l2_frequency *p = arg;
2039         enum v4l2_tuner_type type;
2040         int ret;
2041
2042         ret = v4l_enable_media_source(vfd);
2043         if (ret)
2044                 return ret;
2045         if (vfd->vfl_type == VFL_TYPE_SDR) {
2046                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2047                         return -EINVAL;
2048         } else {
2049                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2050                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2051                 if (type != p->type)
2052                         return -EINVAL;
2053         }
2054         return ops->vidioc_s_frequency(file, fh, p);
2055 }
2056
2057 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
2058                                 struct file *file, void *fh, void *arg)
2059 {
2060         struct video_device *vfd = video_devdata(file);
2061         struct v4l2_standard *p = arg;
2062
2063         return v4l_video_std_enumstd(p, vfd->tvnorms);
2064 }
2065
2066 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
2067                                 struct file *file, void *fh, void *arg)
2068 {
2069         struct video_device *vfd = video_devdata(file);
2070         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
2071         int ret;
2072
2073         ret = v4l_enable_media_source(vfd);
2074         if (ret)
2075                 return ret;
2076         norm = id & vfd->tvnorms;
2077         if (vfd->tvnorms && !norm)      /* Check if std is supported */
2078                 return -EINVAL;
2079
2080         /* Calls the specific handler */
2081         return ops->vidioc_s_std(file, fh, norm);
2082 }
2083
2084 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
2085                                 struct file *file, void *fh, void *arg)
2086 {
2087         struct video_device *vfd = video_devdata(file);
2088         v4l2_std_id *p = arg;
2089         int ret;
2090
2091         ret = v4l_enable_media_source(vfd);
2092         if (ret)
2093                 return ret;
2094         /*
2095          * If no signal is detected, then the driver should return
2096          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
2097          * any standards that do not apply removed.
2098          *
2099          * This means that tuners, audio and video decoders can join
2100          * their efforts to improve the standards detection.
2101          */
2102         *p = vfd->tvnorms;
2103         return ops->vidioc_querystd(file, fh, arg);
2104 }
2105
2106 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2107                                 struct file *file, void *fh, void *arg)
2108 {
2109         struct video_device *vfd = video_devdata(file);
2110         struct v4l2_hw_freq_seek *p = arg;
2111         enum v4l2_tuner_type type;
2112         int ret;
2113
2114         ret = v4l_enable_media_source(vfd);
2115         if (ret)
2116                 return ret;
2117         /* s_hw_freq_seek is not supported for SDR for now */
2118         if (vfd->vfl_type == VFL_TYPE_SDR)
2119                 return -EINVAL;
2120
2121         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2122                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2123         if (p->type != type)
2124                 return -EINVAL;
2125         return ops->vidioc_s_hw_freq_seek(file, fh, p);
2126 }
2127
2128 static int v4l_s_fbuf(const struct v4l2_ioctl_ops *ops,
2129                       struct file *file, void *fh, void *arg)
2130 {
2131         struct v4l2_framebuffer *p = arg;
2132
2133         p->base = NULL;
2134         return ops->vidioc_s_fbuf(file, fh, p);
2135 }
2136
2137 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2138                                 struct file *file, void *fh, void *arg)
2139 {
2140         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2141 }
2142
2143 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2144                                 struct file *file, void *fh, void *arg)
2145 {
2146         struct video_device *vfd = video_devdata(file);
2147         struct v4l2_requestbuffers *p = arg;
2148         int ret = check_fmt(file, p->type);
2149
2150         if (ret)
2151                 return ret;
2152
2153         memset_after(p, 0, flags);
2154
2155         p->capabilities = 0;
2156         if (is_valid_ioctl(vfd, VIDIOC_REMOVE_BUFS))
2157                 p->capabilities = V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS;
2158
2159         return ops->vidioc_reqbufs(file, fh, p);
2160 }
2161
2162 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2163                                 struct file *file, void *fh, void *arg)
2164 {
2165         struct v4l2_buffer *p = arg;
2166         int ret = check_fmt(file, p->type);
2167
2168         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2169 }
2170
2171 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2172                                 struct file *file, void *fh, void *arg)
2173 {
2174         struct v4l2_buffer *p = arg;
2175         int ret = check_fmt(file, p->type);
2176
2177         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2178 }
2179
2180 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2181                                 struct file *file, void *fh, void *arg)
2182 {
2183         struct v4l2_buffer *p = arg;
2184         int ret = check_fmt(file, p->type);
2185
2186         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2187 }
2188
2189 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2190                                 struct file *file, void *fh, void *arg)
2191 {
2192         struct video_device *vfd = video_devdata(file);
2193         struct v4l2_create_buffers *create = arg;
2194         int ret = check_fmt(file, create->format.type);
2195
2196         if (ret)
2197                 return ret;
2198
2199         memset_after(create, 0, flags);
2200
2201         v4l_sanitize_format(&create->format);
2202
2203         create->capabilities = 0;
2204         if (is_valid_ioctl(vfd, VIDIOC_REMOVE_BUFS))
2205                 create->capabilities = V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS;
2206
2207         ret = ops->vidioc_create_bufs(file, fh, create);
2208
2209         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2210             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2211                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2212
2213         return ret;
2214 }
2215
2216 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2217                                 struct file *file, void *fh, void *arg)
2218 {
2219         struct v4l2_buffer *b = arg;
2220         int ret = check_fmt(file, b->type);
2221
2222         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2223 }
2224
2225 static int v4l_remove_bufs(const struct v4l2_ioctl_ops *ops,
2226                            struct file *file, void *fh, void *arg)
2227 {
2228         struct v4l2_remove_buffers *remove = arg;
2229
2230         if (ops->vidioc_remove_bufs)
2231                 return ops->vidioc_remove_bufs(file, fh, remove);
2232
2233         return -ENOTTY;
2234 }
2235
2236 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2237                                 struct file *file, void *fh, void *arg)
2238 {
2239         struct video_device *vfd = video_devdata(file);
2240         struct v4l2_streamparm *p = arg;
2241         v4l2_std_id std;
2242         int ret = check_fmt(file, p->type);
2243
2244         if (ret)
2245                 return ret;
2246         if (ops->vidioc_g_parm)
2247                 return ops->vidioc_g_parm(file, fh, p);
2248         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2249             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2250                 return -EINVAL;
2251         if (vfd->device_caps & V4L2_CAP_READWRITE)
2252                 p->parm.capture.readbuffers = 2;
2253         ret = ops->vidioc_g_std(file, fh, &std);
2254         if (ret == 0)
2255                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2256         return ret;
2257 }
2258
2259 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2260                                 struct file *file, void *fh, void *arg)
2261 {
2262         struct v4l2_streamparm *p = arg;
2263         int ret = check_fmt(file, p->type);
2264
2265         if (ret)
2266                 return ret;
2267
2268         /* Note: extendedmode is never used in drivers */
2269         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2270                 memset(p->parm.output.reserved, 0,
2271                        sizeof(p->parm.output.reserved));
2272                 p->parm.output.extendedmode = 0;
2273                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2274         } else {
2275                 memset(p->parm.capture.reserved, 0,
2276                        sizeof(p->parm.capture.reserved));
2277                 p->parm.capture.extendedmode = 0;
2278                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2279         }
2280         return ops->vidioc_s_parm(file, fh, p);
2281 }
2282
2283 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2284                                 struct file *file, void *fh, void *arg)
2285 {
2286         struct video_device *vfd = video_devdata(file);
2287         struct v4l2_queryctrl *p = arg;
2288         struct v4l2_fh *vfh =
2289                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2290
2291         if (vfh && vfh->ctrl_handler)
2292                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2293         if (vfd->ctrl_handler)
2294                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2295         if (ops->vidioc_queryctrl)
2296                 return ops->vidioc_queryctrl(file, fh, p);
2297         return -ENOTTY;
2298 }
2299
2300 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2301                                 struct file *file, void *fh, void *arg)
2302 {
2303         struct video_device *vfd = video_devdata(file);
2304         struct v4l2_query_ext_ctrl *p = arg;
2305         struct v4l2_fh *vfh =
2306                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2307
2308         if (vfh && vfh->ctrl_handler)
2309                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2310         if (vfd->ctrl_handler)
2311                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2312         if (ops->vidioc_query_ext_ctrl)
2313                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2314         return -ENOTTY;
2315 }
2316
2317 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2318                                 struct file *file, void *fh, void *arg)
2319 {
2320         struct video_device *vfd = video_devdata(file);
2321         struct v4l2_querymenu *p = arg;
2322         struct v4l2_fh *vfh =
2323                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2324
2325         if (vfh && vfh->ctrl_handler)
2326                 return v4l2_querymenu(vfh->ctrl_handler, p);
2327         if (vfd->ctrl_handler)
2328                 return v4l2_querymenu(vfd->ctrl_handler, p);
2329         if (ops->vidioc_querymenu)
2330                 return ops->vidioc_querymenu(file, fh, p);
2331         return -ENOTTY;
2332 }
2333
2334 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2335                                 struct file *file, void *fh, void *arg)
2336 {
2337         struct video_device *vfd = video_devdata(file);
2338         struct v4l2_control *p = arg;
2339         struct v4l2_fh *vfh =
2340                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2341         struct v4l2_ext_controls ctrls;
2342         struct v4l2_ext_control ctrl;
2343
2344         if (vfh && vfh->ctrl_handler)
2345                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2346         if (vfd->ctrl_handler)
2347                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2348         if (ops->vidioc_g_ctrl)
2349                 return ops->vidioc_g_ctrl(file, fh, p);
2350         if (ops->vidioc_g_ext_ctrls == NULL)
2351                 return -ENOTTY;
2352
2353         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2354         ctrls.count = 1;
2355         ctrls.controls = &ctrl;
2356         ctrl.id = p->id;
2357         ctrl.value = p->value;
2358         if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
2359                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2360
2361                 if (ret == 0)
2362                         p->value = ctrl.value;
2363                 return ret;
2364         }
2365         return -EINVAL;
2366 }
2367
2368 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2369                                 struct file *file, void *fh, void *arg)
2370 {
2371         struct video_device *vfd = video_devdata(file);
2372         struct v4l2_control *p = arg;
2373         struct v4l2_fh *vfh =
2374                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2375         struct v4l2_ext_controls ctrls;
2376         struct v4l2_ext_control ctrl;
2377         int ret;
2378
2379         if (vfh && vfh->ctrl_handler)
2380                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2381         if (vfd->ctrl_handler)
2382                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2383         if (ops->vidioc_s_ctrl)
2384                 return ops->vidioc_s_ctrl(file, fh, p);
2385         if (ops->vidioc_s_ext_ctrls == NULL)
2386                 return -ENOTTY;
2387
2388         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2389         ctrls.count = 1;
2390         ctrls.controls = &ctrl;
2391         ctrl.id = p->id;
2392         ctrl.value = p->value;
2393         if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
2394                 return -EINVAL;
2395         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2396         p->value = ctrl.value;
2397         return ret;
2398 }
2399
2400 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2401                                 struct file *file, void *fh, void *arg)
2402 {
2403         struct video_device *vfd = video_devdata(file);
2404         struct v4l2_ext_controls *p = arg;
2405         struct v4l2_fh *vfh =
2406                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2407
2408         p->error_idx = p->count;
2409         if (vfh && vfh->ctrl_handler)
2410                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2411                                         vfd, vfd->v4l2_dev->mdev, p);
2412         if (vfd->ctrl_handler)
2413                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2414                                         vfd, vfd->v4l2_dev->mdev, p);
2415         if (ops->vidioc_g_ext_ctrls == NULL)
2416                 return -ENOTTY;
2417         return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
2418                                 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2419 }
2420
2421 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2422                                 struct file *file, void *fh, void *arg)
2423 {
2424         struct video_device *vfd = video_devdata(file);
2425         struct v4l2_ext_controls *p = arg;
2426         struct v4l2_fh *vfh =
2427                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2428
2429         p->error_idx = p->count;
2430         if (vfh && vfh->ctrl_handler)
2431                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2432                                         vfd, vfd->v4l2_dev->mdev, p);
2433         if (vfd->ctrl_handler)
2434                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2435                                         vfd, vfd->v4l2_dev->mdev, p);
2436         if (ops->vidioc_s_ext_ctrls == NULL)
2437                 return -ENOTTY;
2438         return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
2439                                 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2440 }
2441
2442 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2443                                 struct file *file, void *fh, void *arg)
2444 {
2445         struct video_device *vfd = video_devdata(file);
2446         struct v4l2_ext_controls *p = arg;
2447         struct v4l2_fh *vfh =
2448                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2449
2450         p->error_idx = p->count;
2451         if (vfh && vfh->ctrl_handler)
2452                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2453                                           vfd, vfd->v4l2_dev->mdev, p);
2454         if (vfd->ctrl_handler)
2455                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2456                                           vfd, vfd->v4l2_dev->mdev, p);
2457         if (ops->vidioc_try_ext_ctrls == NULL)
2458                 return -ENOTTY;
2459         return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
2460                         ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2461 }
2462
2463 /*
2464  * The selection API specified originally that the _MPLANE buffer types
2465  * shouldn't be used. The reasons for this are lost in the mists of time
2466  * (or just really crappy memories). Regardless, this is really annoying
2467  * for userspace. So to keep things simple we map _MPLANE buffer types
2468  * to their 'regular' counterparts before calling the driver. And we
2469  * restore it afterwards. This way applications can use either buffer
2470  * type and drivers don't need to check for both.
2471  */
2472 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2473                            struct file *file, void *fh, void *arg)
2474 {
2475         struct v4l2_selection *p = arg;
2476         u32 old_type = p->type;
2477         int ret;
2478
2479         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2480                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2481         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2482                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2483         ret = ops->vidioc_g_selection(file, fh, p);
2484         p->type = old_type;
2485         return ret;
2486 }
2487
2488 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2489                            struct file *file, void *fh, void *arg)
2490 {
2491         struct v4l2_selection *p = arg;
2492         u32 old_type = p->type;
2493         int ret;
2494
2495         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2496                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2497         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2498                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2499         ret = ops->vidioc_s_selection(file, fh, p);
2500         p->type = old_type;
2501         return ret;
2502 }
2503
2504 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2505                                 struct file *file, void *fh, void *arg)
2506 {
2507         struct video_device *vfd = video_devdata(file);
2508         struct v4l2_crop *p = arg;
2509         struct v4l2_selection s = {
2510                 .type = p->type,
2511         };
2512         int ret;
2513
2514         /* simulate capture crop using selection api */
2515
2516         /* crop means compose for output devices */
2517         if (V4L2_TYPE_IS_OUTPUT(p->type))
2518                 s.target = V4L2_SEL_TGT_COMPOSE;
2519         else
2520                 s.target = V4L2_SEL_TGT_CROP;
2521
2522         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2523                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2524                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2525
2526         ret = v4l_g_selection(ops, file, fh, &s);
2527
2528         /* copying results to old structure on success */
2529         if (!ret)
2530                 p->c = s.r;
2531         return ret;
2532 }
2533
2534 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2535                                 struct file *file, void *fh, void *arg)
2536 {
2537         struct video_device *vfd = video_devdata(file);
2538         struct v4l2_crop *p = arg;
2539         struct v4l2_selection s = {
2540                 .type = p->type,
2541                 .r = p->c,
2542         };
2543
2544         /* simulate capture crop using selection api */
2545
2546         /* crop means compose for output devices */
2547         if (V4L2_TYPE_IS_OUTPUT(p->type))
2548                 s.target = V4L2_SEL_TGT_COMPOSE;
2549         else
2550                 s.target = V4L2_SEL_TGT_CROP;
2551
2552         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2553                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2554                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2555
2556         return v4l_s_selection(ops, file, fh, &s);
2557 }
2558
2559 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2560                                 struct file *file, void *fh, void *arg)
2561 {
2562         struct video_device *vfd = video_devdata(file);
2563         struct v4l2_cropcap *p = arg;
2564         struct v4l2_selection s = { .type = p->type };
2565         int ret = 0;
2566
2567         /* setting trivial pixelaspect */
2568         p->pixelaspect.numerator = 1;
2569         p->pixelaspect.denominator = 1;
2570
2571         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2572                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2573         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2574                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2575
2576         /*
2577          * The determine_valid_ioctls() call already should ensure
2578          * that this can never happen, but just in case...
2579          */
2580         if (WARN_ON(!ops->vidioc_g_selection))
2581                 return -ENOTTY;
2582
2583         if (ops->vidioc_g_pixelaspect)
2584                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2585                                                 &p->pixelaspect);
2586
2587         /*
2588          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2589          * square pixel aspect ratio in that case.
2590          */
2591         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2592                 return ret;
2593
2594         /* Use g_selection() to fill in the bounds and defrect rectangles */
2595
2596         /* obtaining bounds */
2597         if (V4L2_TYPE_IS_OUTPUT(p->type))
2598                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2599         else
2600                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2601
2602         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2603                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2604                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2605
2606         ret = v4l_g_selection(ops, file, fh, &s);
2607         if (ret)
2608                 return ret;
2609         p->bounds = s.r;
2610
2611         /* obtaining defrect */
2612         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2613                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2614         else
2615                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2616
2617         ret = v4l_g_selection(ops, file, fh, &s);
2618         if (ret)
2619                 return ret;
2620         p->defrect = s.r;
2621
2622         return 0;
2623 }
2624
2625 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2626                                 struct file *file, void *fh, void *arg)
2627 {
2628         struct video_device *vfd = video_devdata(file);
2629         int ret;
2630
2631         if (vfd->v4l2_dev)
2632                 pr_info("%s: =================  START STATUS  =================\n",
2633                         vfd->v4l2_dev->name);
2634         ret = ops->vidioc_log_status(file, fh);
2635         if (vfd->v4l2_dev)
2636                 pr_info("%s: ==================  END STATUS  ==================\n",
2637                         vfd->v4l2_dev->name);
2638         return ret;
2639 }
2640
2641 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2642                                 struct file *file, void *fh, void *arg)
2643 {
2644 #ifdef CONFIG_VIDEO_ADV_DEBUG
2645         struct v4l2_dbg_register *p = arg;
2646         struct video_device *vfd = video_devdata(file);
2647         struct v4l2_subdev *sd;
2648         int idx = 0;
2649
2650         if (!capable(CAP_SYS_ADMIN))
2651                 return -EPERM;
2652         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2653                 if (vfd->v4l2_dev == NULL)
2654                         return -EINVAL;
2655                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2656                         if (p->match.addr == idx++)
2657                                 return v4l2_subdev_call(sd, core, g_register, p);
2658                 return -EINVAL;
2659         }
2660         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2661             (ops->vidioc_g_chip_info || p->match.addr == 0))
2662                 return ops->vidioc_g_register(file, fh, p);
2663         return -EINVAL;
2664 #else
2665         return -ENOTTY;
2666 #endif
2667 }
2668
2669 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2670                                 struct file *file, void *fh, void *arg)
2671 {
2672 #ifdef CONFIG_VIDEO_ADV_DEBUG
2673         const struct v4l2_dbg_register *p = arg;
2674         struct video_device *vfd = video_devdata(file);
2675         struct v4l2_subdev *sd;
2676         int idx = 0;
2677
2678         if (!capable(CAP_SYS_ADMIN))
2679                 return -EPERM;
2680         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2681                 if (vfd->v4l2_dev == NULL)
2682                         return -EINVAL;
2683                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2684                         if (p->match.addr == idx++)
2685                                 return v4l2_subdev_call(sd, core, s_register, p);
2686                 return -EINVAL;
2687         }
2688         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2689             (ops->vidioc_g_chip_info || p->match.addr == 0))
2690                 return ops->vidioc_s_register(file, fh, p);
2691         return -EINVAL;
2692 #else
2693         return -ENOTTY;
2694 #endif
2695 }
2696
2697 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2698                                 struct file *file, void *fh, void *arg)
2699 {
2700 #ifdef CONFIG_VIDEO_ADV_DEBUG
2701         struct video_device *vfd = video_devdata(file);
2702         struct v4l2_dbg_chip_info *p = arg;
2703         struct v4l2_subdev *sd;
2704         int idx = 0;
2705
2706         switch (p->match.type) {
2707         case V4L2_CHIP_MATCH_BRIDGE:
2708                 if (ops->vidioc_s_register)
2709                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2710                 if (ops->vidioc_g_register)
2711                         p->flags |= V4L2_CHIP_FL_READABLE;
2712                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2713                 if (ops->vidioc_g_chip_info)
2714                         return ops->vidioc_g_chip_info(file, fh, arg);
2715                 if (p->match.addr)
2716                         return -EINVAL;
2717                 return 0;
2718
2719         case V4L2_CHIP_MATCH_SUBDEV:
2720                 if (vfd->v4l2_dev == NULL)
2721                         break;
2722                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2723                         if (p->match.addr != idx++)
2724                                 continue;
2725                         if (sd->ops->core && sd->ops->core->s_register)
2726                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2727                         if (sd->ops->core && sd->ops->core->g_register)
2728                                 p->flags |= V4L2_CHIP_FL_READABLE;
2729                         strscpy(p->name, sd->name, sizeof(p->name));
2730                         return 0;
2731                 }
2732                 break;
2733         }
2734         return -EINVAL;
2735 #else
2736         return -ENOTTY;
2737 #endif
2738 }
2739
2740 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2741                                 struct file *file, void *fh, void *arg)
2742 {
2743         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2744 }
2745
2746 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2747                                 struct file *file, void *fh, void *arg)
2748 {
2749         return ops->vidioc_subscribe_event(fh, arg);
2750 }
2751
2752 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2753                                 struct file *file, void *fh, void *arg)
2754 {
2755         return ops->vidioc_unsubscribe_event(fh, arg);
2756 }
2757
2758 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2759                                 struct file *file, void *fh, void *arg)
2760 {
2761         struct v4l2_sliced_vbi_cap *p = arg;
2762         int ret = check_fmt(file, p->type);
2763
2764         if (ret)
2765                 return ret;
2766
2767         /* Clear up to type, everything after type is zeroed already */
2768         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2769
2770         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2771 }
2772
2773 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2774                                 struct file *file, void *fh, void *arg)
2775 {
2776         struct video_device *vfd = video_devdata(file);
2777         struct v4l2_frequency_band *p = arg;
2778         enum v4l2_tuner_type type;
2779         int err;
2780
2781         if (vfd->vfl_type == VFL_TYPE_SDR) {
2782                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2783                         return -EINVAL;
2784                 type = p->type;
2785         } else {
2786                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2787                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2788                 if (type != p->type)
2789                         return -EINVAL;
2790         }
2791         if (ops->vidioc_enum_freq_bands) {
2792                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2793                 if (err != -ENOTTY)
2794                         return err;
2795         }
2796         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2797                 struct v4l2_tuner t = {
2798                         .index = p->tuner,
2799                         .type = type,
2800                 };
2801
2802                 if (p->index)
2803                         return -EINVAL;
2804                 err = ops->vidioc_g_tuner(file, fh, &t);
2805                 if (err)
2806                         return err;
2807                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2808                 p->rangelow = t.rangelow;
2809                 p->rangehigh = t.rangehigh;
2810                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2811                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2812                 return 0;
2813         }
2814         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2815                 struct v4l2_modulator m = {
2816                         .index = p->tuner,
2817                 };
2818
2819                 if (type != V4L2_TUNER_RADIO)
2820                         return -EINVAL;
2821                 if (p->index)
2822                         return -EINVAL;
2823                 err = ops->vidioc_g_modulator(file, fh, &m);
2824                 if (err)
2825                         return err;
2826                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2827                 p->rangelow = m.rangelow;
2828                 p->rangehigh = m.rangehigh;
2829                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2830                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2831                 return 0;
2832         }
2833         return -ENOTTY;
2834 }
2835
2836 struct v4l2_ioctl_info {
2837         unsigned int ioctl;
2838         u32 flags;
2839         const char * const name;
2840         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2841                     void *fh, void *p);
2842         void (*debug)(const void *arg, bool write_only);
2843 };
2844
2845 /* This control needs a priority check */
2846 #define INFO_FL_PRIO            (1 << 0)
2847 /* This control can be valid if the filehandle passes a control handler. */
2848 #define INFO_FL_CTRL            (1 << 1)
2849 /* Queuing ioctl */
2850 #define INFO_FL_QUEUE           (1 << 2)
2851 /* Always copy back result, even on error */
2852 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2853 /* Zero struct from after the field to the end */
2854 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2855         ((offsetof(struct v4l2_struct, field) +                 \
2856           sizeof_field(struct v4l2_struct, field)) << 16)
2857 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2858
2859 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2860         static int v4l_stub_ ## _vidioc(                        \
2861                         const struct v4l2_ioctl_ops *ops,       \
2862                         struct file *file, void *fh, void *p)   \
2863         {                                                       \
2864                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2865         }
2866
2867 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2868         [_IOC_NR(_ioctl)] = {                                   \
2869                 .ioctl = _ioctl,                                \
2870                 .flags = _flags,                                \
2871                 .name = #_ioctl,                                \
2872                 .func = _func,                                  \
2873                 .debug = _debug,                                \
2874         }
2875
2876 DEFINE_V4L_STUB_FUNC(g_fbuf)
2877 DEFINE_V4L_STUB_FUNC(expbuf)
2878 DEFINE_V4L_STUB_FUNC(g_std)
2879 DEFINE_V4L_STUB_FUNC(g_audio)
2880 DEFINE_V4L_STUB_FUNC(s_audio)
2881 DEFINE_V4L_STUB_FUNC(g_edid)
2882 DEFINE_V4L_STUB_FUNC(s_edid)
2883 DEFINE_V4L_STUB_FUNC(g_audout)
2884 DEFINE_V4L_STUB_FUNC(s_audout)
2885 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2886 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2887 DEFINE_V4L_STUB_FUNC(enumaudio)
2888 DEFINE_V4L_STUB_FUNC(enumaudout)
2889 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2890 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2891 DEFINE_V4L_STUB_FUNC(g_enc_index)
2892 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2893 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2894 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2895 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2896 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2897 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2898 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2899 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2900 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2901
2902 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2903         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2904         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2905         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2906         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2907         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2908         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2909         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2910         IOCTL_INFO(VIDIOC_S_FBUF, v4l_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2911         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2912         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2913         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2914         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2915         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2916         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2917         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2918         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2919         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2920         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2921         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2922         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2923         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2924         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2925         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2926         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2927         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2928         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2929         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2930         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2931         IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2932         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2933         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2934         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2935         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2936         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2937         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2938         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2939         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2940         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2941         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2942         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2943         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2944         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2945         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2946         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2947         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2948         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2949         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2950         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2951         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2952         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2953         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2954         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2955         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2956         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2957         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)),
2958         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2959         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2960         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2961         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2962         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2963         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2964         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2965         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2966         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2967         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2968         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2969         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2970         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2971         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2972         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)),
2973         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2974         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2975         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2976         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2977         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2978         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2979         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2980         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2981         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2982         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2983         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)),
2984         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)),
2985         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)),
2986 };
2987 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2988
2989 static bool v4l2_is_known_ioctl(unsigned int cmd)
2990 {
2991         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2992                 return false;
2993         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2994 }
2995
2996 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2997                                          struct v4l2_fh *vfh, unsigned int cmd,
2998                                          void *arg)
2999 {
3000         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
3001                 return vdev->lock;
3002         if (vfh && vfh->m2m_ctx &&
3003             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
3004                 if (vfh->m2m_ctx->q_lock)
3005                         return vfh->m2m_ctx->q_lock;
3006         }
3007         if (vdev->queue && vdev->queue->lock &&
3008                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
3009                 return vdev->queue->lock;
3010         return vdev->lock;
3011 }
3012
3013 /* Common ioctl debug function. This function can be used by
3014    external ioctl messages as well as internal V4L ioctl */
3015 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
3016 {
3017         const char *dir, *type;
3018
3019         if (prefix)
3020                 printk(KERN_DEBUG "%s: ", prefix);
3021
3022         switch (_IOC_TYPE(cmd)) {
3023         case 'd':
3024                 type = "v4l2_int";
3025                 break;
3026         case 'V':
3027                 if (!v4l2_is_known_ioctl(cmd)) {
3028                         type = "v4l2";
3029                         break;
3030                 }
3031                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
3032                 return;
3033         default:
3034                 type = "unknown";
3035                 break;
3036         }
3037
3038         switch (_IOC_DIR(cmd)) {
3039         case _IOC_NONE:              dir = "--"; break;
3040         case _IOC_READ:              dir = "r-"; break;
3041         case _IOC_WRITE:             dir = "-w"; break;
3042         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
3043         default:                     dir = "*ERR*"; break;
3044         }
3045         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
3046                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
3047 }
3048 EXPORT_SYMBOL(v4l_printk_ioctl);
3049
3050 static long __video_do_ioctl(struct file *file,
3051                 unsigned int cmd, void *arg)
3052 {
3053         struct video_device *vfd = video_devdata(file);
3054         struct mutex *req_queue_lock = NULL;
3055         struct mutex *lock; /* ioctl serialization mutex */
3056         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
3057         bool write_only = false;
3058         struct v4l2_ioctl_info default_info;
3059         const struct v4l2_ioctl_info *info;
3060         void *fh = file->private_data;
3061         struct v4l2_fh *vfh = NULL;
3062         int dev_debug = vfd->dev_debug;
3063         long ret = -ENOTTY;
3064
3065         if (ops == NULL) {
3066                 pr_warn("%s: has no ioctl_ops.\n",
3067                                 video_device_node_name(vfd));
3068                 return ret;
3069         }
3070
3071         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
3072                 vfh = file->private_data;
3073
3074         /*
3075          * We need to serialize streamon/off with queueing new requests.
3076          * These ioctls may trigger the cancellation of a streaming
3077          * operation, and that should not be mixed with queueing a new
3078          * request at the same time.
3079          */
3080         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
3081             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
3082                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
3083
3084                 if (mutex_lock_interruptible(req_queue_lock))
3085                         return -ERESTARTSYS;
3086         }
3087
3088         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
3089
3090         if (lock && mutex_lock_interruptible(lock)) {
3091                 if (req_queue_lock)
3092                         mutex_unlock(req_queue_lock);
3093                 return -ERESTARTSYS;
3094         }
3095
3096         if (!video_is_registered(vfd)) {
3097                 ret = -ENODEV;
3098                 goto unlock;
3099         }
3100
3101         if (v4l2_is_known_ioctl(cmd)) {
3102                 info = &v4l2_ioctls[_IOC_NR(cmd)];
3103
3104                 if (!is_valid_ioctl(vfd, cmd) &&
3105                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
3106                         goto done;
3107
3108                 if (vfh && (info->flags & INFO_FL_PRIO)) {
3109                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
3110                         if (ret)
3111                                 goto done;
3112                 }
3113         } else {
3114                 default_info.ioctl = cmd;
3115                 default_info.flags = 0;
3116                 default_info.debug = v4l_print_default;
3117                 info = &default_info;
3118         }
3119
3120         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
3121         if (info != &default_info) {
3122                 ret = info->func(ops, file, fh, arg);
3123         } else if (!ops->vidioc_default) {
3124                 ret = -ENOTTY;
3125         } else {
3126                 ret = ops->vidioc_default(file, fh,
3127                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
3128                         cmd, arg);
3129         }
3130
3131 done:
3132         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
3133                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3134                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3135                         goto unlock;
3136
3137                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3138                 if (ret < 0)
3139                         pr_cont(": error %ld", ret);
3140                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3141                         pr_cont("\n");
3142                 else if (_IOC_DIR(cmd) == _IOC_NONE)
3143                         info->debug(arg, write_only);
3144                 else {
3145                         pr_cont(": ");
3146                         info->debug(arg, write_only);
3147                 }
3148         }
3149
3150 unlock:
3151         if (lock)
3152                 mutex_unlock(lock);
3153         if (req_queue_lock)
3154                 mutex_unlock(req_queue_lock);
3155         return ret;
3156 }
3157
3158 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3159                             void __user **user_ptr, void ***kernel_ptr)
3160 {
3161         int ret = 0;
3162
3163         switch (cmd) {
3164         case VIDIOC_PREPARE_BUF:
3165         case VIDIOC_QUERYBUF:
3166         case VIDIOC_QBUF:
3167         case VIDIOC_DQBUF: {
3168                 struct v4l2_buffer *buf = parg;
3169
3170                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3171                         if (buf->length > VIDEO_MAX_PLANES) {
3172                                 ret = -EINVAL;
3173                                 break;
3174                         }
3175                         *user_ptr = (void __user *)buf->m.planes;
3176                         *kernel_ptr = (void **)&buf->m.planes;
3177                         *array_size = sizeof(struct v4l2_plane) * buf->length;
3178                         ret = 1;
3179                 }
3180                 break;
3181         }
3182
3183         case VIDIOC_G_EDID:
3184         case VIDIOC_S_EDID: {
3185                 struct v4l2_edid *edid = parg;
3186
3187                 if (edid->blocks) {
3188                         if (edid->blocks > 256) {
3189                                 ret = -EINVAL;
3190                                 break;
3191                         }
3192                         *user_ptr = (void __user *)edid->edid;
3193                         *kernel_ptr = (void **)&edid->edid;
3194                         *array_size = edid->blocks * 128;
3195                         ret = 1;
3196                 }
3197                 break;
3198         }
3199
3200         case VIDIOC_S_EXT_CTRLS:
3201         case VIDIOC_G_EXT_CTRLS:
3202         case VIDIOC_TRY_EXT_CTRLS: {
3203                 struct v4l2_ext_controls *ctrls = parg;
3204
3205                 if (ctrls->count != 0) {
3206                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3207                                 ret = -EINVAL;
3208                                 break;
3209                         }
3210                         *user_ptr = (void __user *)ctrls->controls;
3211                         *kernel_ptr = (void **)&ctrls->controls;
3212                         *array_size = sizeof(struct v4l2_ext_control)
3213                                     * ctrls->count;
3214                         ret = 1;
3215                 }
3216                 break;
3217         }
3218
3219         case VIDIOC_SUBDEV_G_ROUTING:
3220         case VIDIOC_SUBDEV_S_ROUTING: {
3221                 struct v4l2_subdev_routing *routing = parg;
3222
3223                 if (routing->len_routes > 256)
3224                         return -E2BIG;
3225
3226                 *user_ptr = u64_to_user_ptr(routing->routes);
3227                 *kernel_ptr = (void **)&routing->routes;
3228                 *array_size = sizeof(struct v4l2_subdev_route)
3229                             * routing->len_routes;
3230                 ret = 1;
3231                 break;
3232         }
3233         }
3234
3235         return ret;
3236 }
3237
3238 static unsigned int video_translate_cmd(unsigned int cmd)
3239 {
3240 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3241         switch (cmd) {
3242         case VIDIOC_DQEVENT_TIME32:
3243                 return VIDIOC_DQEVENT;
3244         case VIDIOC_QUERYBUF_TIME32:
3245                 return VIDIOC_QUERYBUF;
3246         case VIDIOC_QBUF_TIME32:
3247                 return VIDIOC_QBUF;
3248         case VIDIOC_DQBUF_TIME32:
3249                 return VIDIOC_DQBUF;
3250         case VIDIOC_PREPARE_BUF_TIME32:
3251                 return VIDIOC_PREPARE_BUF;
3252         }
3253 #endif
3254         if (in_compat_syscall())
3255                 return v4l2_compat_translate_cmd(cmd);
3256
3257         return cmd;
3258 }
3259
3260 static int video_get_user(void __user *arg, void *parg,
3261                           unsigned int real_cmd, unsigned int cmd,
3262                           bool *always_copy)
3263 {
3264         unsigned int n = _IOC_SIZE(real_cmd);
3265         int err = 0;
3266
3267         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3268                 /* read-only ioctl */
3269                 memset(parg, 0, n);
3270                 return 0;
3271         }
3272
3273         /*
3274          * In some cases, only a few fields are used as input,
3275          * i.e. when the app sets "index" and then the driver
3276          * fills in the rest of the structure for the thing
3277          * with that index.  We only need to copy up the first
3278          * non-input field.
3279          */
3280         if (v4l2_is_known_ioctl(real_cmd)) {
3281                 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3282
3283                 if (flags & INFO_FL_CLEAR_MASK)
3284                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3285                 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3286         }
3287
3288         if (cmd == real_cmd) {
3289                 if (copy_from_user(parg, (void __user *)arg, n))
3290                         err = -EFAULT;
3291         } else if (in_compat_syscall()) {
3292                 memset(parg, 0, n);
3293                 err = v4l2_compat_get_user(arg, parg, cmd);
3294         } else {
3295                 memset(parg, 0, n);
3296 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3297                 switch (cmd) {
3298                 case VIDIOC_QUERYBUF_TIME32:
3299                 case VIDIOC_QBUF_TIME32:
3300                 case VIDIOC_DQBUF_TIME32:
3301                 case VIDIOC_PREPARE_BUF_TIME32: {
3302                         struct v4l2_buffer_time32 vb32;
3303                         struct v4l2_buffer *vb = parg;
3304
3305                         if (copy_from_user(&vb32, arg, sizeof(vb32)))
3306                                 return -EFAULT;
3307
3308                         *vb = (struct v4l2_buffer) {
3309                                 .index          = vb32.index,
3310                                 .type           = vb32.type,
3311                                 .bytesused      = vb32.bytesused,
3312                                 .flags          = vb32.flags,
3313                                 .field          = vb32.field,
3314                                 .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3315                                 .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3316                                 .timecode       = vb32.timecode,
3317                                 .sequence       = vb32.sequence,
3318                                 .memory         = vb32.memory,
3319                                 .m.userptr      = vb32.m.userptr,
3320                                 .length         = vb32.length,
3321                                 .request_fd     = vb32.request_fd,
3322                         };
3323                         break;
3324                 }
3325                 }
3326 #endif
3327         }
3328
3329         /* zero out anything we don't copy from userspace */
3330         if (!err && n < _IOC_SIZE(real_cmd))
3331                 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3332         return err;
3333 }
3334
3335 static int video_put_user(void __user *arg, void *parg,
3336                           unsigned int real_cmd, unsigned int cmd)
3337 {
3338         if (!(_IOC_DIR(cmd) & _IOC_READ))
3339                 return 0;
3340
3341         if (cmd == real_cmd) {
3342                 /*  Copy results into user buffer  */
3343                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3344                         return -EFAULT;
3345                 return 0;
3346         }
3347
3348         if (in_compat_syscall())
3349                 return v4l2_compat_put_user(arg, parg, cmd);
3350
3351 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3352         switch (cmd) {
3353         case VIDIOC_DQEVENT_TIME32: {
3354                 struct v4l2_event *ev = parg;
3355                 struct v4l2_event_time32 ev32;
3356
3357                 memset(&ev32, 0, sizeof(ev32));
3358
3359                 ev32.type       = ev->type;
3360                 ev32.pending    = ev->pending;
3361                 ev32.sequence   = ev->sequence;
3362                 ev32.timestamp.tv_sec   = ev->timestamp.tv_sec;
3363                 ev32.timestamp.tv_nsec  = ev->timestamp.tv_nsec;
3364                 ev32.id         = ev->id;
3365
3366                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3367                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3368
3369                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3370                         return -EFAULT;
3371                 break;
3372         }
3373         case VIDIOC_QUERYBUF_TIME32:
3374         case VIDIOC_QBUF_TIME32:
3375         case VIDIOC_DQBUF_TIME32:
3376         case VIDIOC_PREPARE_BUF_TIME32: {
3377                 struct v4l2_buffer *vb = parg;
3378                 struct v4l2_buffer_time32 vb32;
3379
3380                 memset(&vb32, 0, sizeof(vb32));
3381
3382                 vb32.index      = vb->index;
3383                 vb32.type       = vb->type;
3384                 vb32.bytesused  = vb->bytesused;
3385                 vb32.flags      = vb->flags;
3386                 vb32.field      = vb->field;
3387                 vb32.timestamp.tv_sec   = vb->timestamp.tv_sec;
3388                 vb32.timestamp.tv_usec  = vb->timestamp.tv_usec;
3389                 vb32.timecode   = vb->timecode;
3390                 vb32.sequence   = vb->sequence;
3391                 vb32.memory     = vb->memory;
3392                 vb32.m.userptr  = vb->m.userptr;
3393                 vb32.length     = vb->length;
3394                 vb32.request_fd = vb->request_fd;
3395
3396                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3397                         return -EFAULT;
3398                 break;
3399         }
3400         }
3401 #endif
3402
3403         return 0;
3404 }
3405
3406 long
3407 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3408                v4l2_kioctl func)
3409 {
3410         char    sbuf[128];
3411         void    *mbuf = NULL, *array_buf = NULL;
3412         void    *parg = (void *)arg;
3413         long    err  = -EINVAL;
3414         bool    has_array_args;
3415         bool    always_copy = false;
3416         size_t  array_size = 0;
3417         void __user *user_ptr = NULL;
3418         void    **kernel_ptr = NULL;
3419         unsigned int cmd = video_translate_cmd(orig_cmd);
3420         const size_t ioc_size = _IOC_SIZE(cmd);
3421
3422         /*  Copy arguments into temp kernel buffer  */
3423         if (_IOC_DIR(cmd) != _IOC_NONE) {
3424                 if (ioc_size <= sizeof(sbuf)) {
3425                         parg = sbuf;
3426                 } else {
3427                         /* too big to allocate from stack */
3428                         mbuf = kmalloc(ioc_size, GFP_KERNEL);
3429                         if (NULL == mbuf)
3430                                 return -ENOMEM;
3431                         parg = mbuf;
3432                 }
3433
3434                 err = video_get_user((void __user *)arg, parg, cmd,
3435                                      orig_cmd, &always_copy);
3436                 if (err)
3437                         goto out;
3438         }
3439
3440         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3441         if (err < 0)
3442                 goto out;
3443         has_array_args = err;
3444
3445         if (has_array_args) {
3446                 array_buf = kvmalloc(array_size, GFP_KERNEL);
3447                 err = -ENOMEM;
3448                 if (array_buf == NULL)
3449                         goto out;
3450                 if (in_compat_syscall())
3451                         err = v4l2_compat_get_array_args(file, array_buf,
3452                                                          user_ptr, array_size,
3453                                                          orig_cmd, parg);
3454                 else
3455                         err = copy_from_user(array_buf, user_ptr, array_size) ?
3456                                                                 -EFAULT : 0;
3457                 if (err)
3458                         goto out;
3459                 *kernel_ptr = array_buf;
3460         }
3461
3462         /* Handles IOCTL */
3463         err = func(file, cmd, parg);
3464         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3465                 err = -ENOTTY;
3466                 goto out;
3467         }
3468
3469         if (err == 0) {
3470                 if (cmd == VIDIOC_DQBUF)
3471                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3472                 else if (cmd == VIDIOC_QBUF)
3473                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3474         }
3475
3476         /*
3477          * Some ioctls can return an error, but still have valid
3478          * results that must be returned.
3479          *
3480          * FIXME: subdev IOCTLS are partially handled here and partially in
3481          * v4l2-subdev.c and the 'always_copy' flag can only be set for IOCTLS
3482          * defined here as part of the 'v4l2_ioctls' array. As
3483          * VIDIOC_SUBDEV_[GS]_ROUTING needs to return results to applications
3484          * even in case of failure, but it is not defined here as part of the
3485          * 'v4l2_ioctls' array, insert an ad-hoc check to address that.
3486          */
3487         if (cmd == VIDIOC_SUBDEV_G_ROUTING || cmd == VIDIOC_SUBDEV_S_ROUTING)
3488                 always_copy = true;
3489
3490         if (err < 0 && !always_copy)
3491                 goto out;
3492
3493         if (has_array_args) {
3494                 *kernel_ptr = (void __force *)user_ptr;
3495                 if (in_compat_syscall()) {
3496                         int put_err;
3497
3498                         put_err = v4l2_compat_put_array_args(file, user_ptr,
3499                                                              array_buf,
3500                                                              array_size,
3501                                                              orig_cmd, parg);
3502                         if (put_err)
3503                                 err = put_err;
3504                 } else if (copy_to_user(user_ptr, array_buf, array_size)) {
3505                         err = -EFAULT;
3506                 }
3507         }
3508
3509         if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3510                 err = -EFAULT;
3511 out:
3512         kvfree(array_buf);
3513         kfree(mbuf);
3514         return err;
3515 }
3516
3517 long video_ioctl2(struct file *file,
3518                unsigned int cmd, unsigned long arg)
3519 {
3520         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3521 }
3522 EXPORT_SYMBOL(video_ioctl2);