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/mm.h>
  12 #include <linux/module.h>
  13 #include <linux/slab.h>
  14 #include <linux/types.h>
  15 #include <linux/kernel.h>
  16 #include <linux/version.h>
  17
  18 #include <linux/videodev2.h>
  19
  20 #include <media/v4l2-common.h>
  21 #include <media/v4l2-ioctl.h>
  22 #include <media/v4l2-ctrls.h>
  23 #include <media/v4l2-fh.h>
  24 #include <media/v4l2-event.h>
  25 #include <media/v4l2-device.h>
  26 #include <media/videobuf2-v4l2.h>
  27 #include <media/v4l2-mc.h>
  28 #include <media/v4l2-mem2mem.h>
  29
  30 #include <trace/events/v4l2.h>
  31
  32 /* Zero out the end of the struct pointed to by p.  Everything after, but
  33  * not including, the specified field is cleared. */
  34 #define CLEAR_AFTER_FIELD(p, field) \
  35         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  36         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  37
  38 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  39
  40 struct std_descr {
  41         v4l2_std_id std;
  42         const char *descr;
  43 };
  44
  45 static const struct std_descr standards[] = {
  46         { V4L2_STD_NTSC,        "NTSC"      },
  47         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  48         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  49         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  50         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  51         { V4L2_STD_PAL,         "PAL"       },
  52         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  53         { V4L2_STD_PAL_B,       "PAL-B"     },
  54         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  55         { V4L2_STD_PAL_G,       "PAL-G"     },
  56         { V4L2_STD_PAL_H,       "PAL-H"     },
  57         { V4L2_STD_PAL_I,       "PAL-I"     },
  58         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  59         { V4L2_STD_PAL_D,       "PAL-D"     },
  60         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  61         { V4L2_STD_PAL_K,       "PAL-K"     },
  62         { V4L2_STD_PAL_M,       "PAL-M"     },
  63         { V4L2_STD_PAL_N,       "PAL-N"     },
  64         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  65         { V4L2_STD_PAL_60,      "PAL-60"    },
  66         { V4L2_STD_SECAM,       "SECAM"     },
  67         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  68         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  69         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  70         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  71         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  72         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  73         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  74         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  75         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  76         { 0,                    "Unknown"   }
  77 };
  78
  79 /* video4linux standard ID conversion to standard name
  80  */
  81 const char *v4l2_norm_to_name(v4l2_std_id id)
  82 {
  83         u32 myid = id;
  84         int i;
  85
  86         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  87            64 bit comparisons. So, on that architecture, with some gcc
  88            variants, compilation fails. Currently, the max value is 30bit wide.
  89          */
  90         BUG_ON(myid != id);
  91
  92         for (i = 0; standards[i].std; i++)
  93                 if (myid == standards[i].std)
  94                         break;
  95         return standards[i].descr;
  96 }
  97 EXPORT_SYMBOL(v4l2_norm_to_name);
  98
  99 /* Returns frame period for the given standard */
 100 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 101 {
 102         if (id & V4L2_STD_525_60) {
 103                 frameperiod->numerator = 1001;
 104                 frameperiod->denominator = 30000;
 105         } else {
 106                 frameperiod->numerator = 1;
 107                 frameperiod->denominator = 25;
 108         }
 109 }
 110 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 111
 112 /* Fill in the fields of a v4l2_standard structure according to the
 113    'id' and 'transmission' parameters.  Returns negative on error.  */
 114 int v4l2_video_std_construct(struct v4l2_standard *vs,
 115                              int id, const char *name)
 116 {
 117         vs->id = id;
 118         v4l2_video_std_frame_period(id, &vs->frameperiod);
 119         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 120         strscpy(vs->name, name, sizeof(vs->name));
 121         return 0;
 122 }
 123 EXPORT_SYMBOL(v4l2_video_std_construct);
 124
 125 /* Fill in the fields of a v4l2_standard structure according to the
 126  * 'id' and 'vs->index' parameters. Returns negative on error. */
 127 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 128 {
 129         v4l2_std_id curr_id = 0;
 130         unsigned int index = vs->index, i, j = 0;
 131         const char *descr = "";
 132
 133         /* Return -ENODATA if the id for the current input
 134            or output is 0, meaning that it doesn't support this API. */
 135         if (id == 0)
 136                 return -ENODATA;
 137
 138         /* Return norm array in a canonical way */
 139         for (i = 0; i <= index && id; i++) {
 140                 /* last std value in the standards array is 0, so this
 141                    while always ends there since (id & 0) == 0. */
 142                 while ((id & standards[j].std) != standards[j].std)
 143                         j++;
 144                 curr_id = standards[j].std;
 145                 descr = standards[j].descr;
 146                 j++;
 147                 if (curr_id == 0)
 148                         break;
 149                 if (curr_id != V4L2_STD_PAL &&
 150                                 curr_id != V4L2_STD_SECAM &&
 151                                 curr_id != V4L2_STD_NTSC)
 152                         id &= ~curr_id;
 153         }
 154         if (i <= index)
 155                 return -EINVAL;
 156
 157         v4l2_video_std_construct(vs, curr_id, descr);
 158         return 0;
 159 }
 160
 161 /* ----------------------------------------------------------------- */
 162 /* some arrays for pretty-printing debug messages of enum types      */
 163
 164 const char *v4l2_field_names[] = {
 165         [V4L2_FIELD_ANY]        = "any",
 166         [V4L2_FIELD_NONE]       = "none",
 167         [V4L2_FIELD_TOP]        = "top",
 168         [V4L2_FIELD_BOTTOM]     = "bottom",
 169         [V4L2_FIELD_INTERLACED] = "interlaced",
 170         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 171         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 172         [V4L2_FIELD_ALTERNATE]  = "alternate",
 173         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 174         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 175 };
 176 EXPORT_SYMBOL(v4l2_field_names);
 177
 178 const char *v4l2_type_names[] = {
 179         [0]                                = "0",
 180         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 181         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 182         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 183         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 184         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 185         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 186         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 187         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 188         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 189         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 190         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 191         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 192         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 193         [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 194 };
 195 EXPORT_SYMBOL(v4l2_type_names);
 196
 197 static const char *v4l2_memory_names[] = {
 198         [V4L2_MEMORY_MMAP]    = "mmap",
 199         [V4L2_MEMORY_USERPTR] = "userptr",
 200         [V4L2_MEMORY_OVERLAY] = "overlay",
 201         [V4L2_MEMORY_DMABUF] = "dmabuf",
 202 };
 203
 204 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 205
 206 /* ------------------------------------------------------------------ */
 207 /* debug help functions                                               */
 208
 209 static void v4l_print_querycap(const void *arg, bool write_only)
 210 {
 211         const struct v4l2_capability *p = arg;
 212
 213         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 214                 (int)sizeof(p->driver), p->driver,
 215                 (int)sizeof(p->card), p->card,
 216                 (int)sizeof(p->bus_info), p->bus_info,
 217                 p->version, p->capabilities, p->device_caps);
 218 }
 219
 220 static void v4l_print_enuminput(const void *arg, bool write_only)
 221 {
 222         const struct v4l2_input *p = arg;
 223
 224         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 225                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 226                 p->tuner, (unsigned long long)p->std, p->status,
 227                 p->capabilities);
 228 }
 229
 230 static void v4l_print_enumoutput(const void *arg, bool write_only)
 231 {
 232         const struct v4l2_output *p = arg;
 233
 234         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 235                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 236                 p->modulator, (unsigned long long)p->std, p->capabilities);
 237 }
 238
 239 static void v4l_print_audio(const void *arg, bool write_only)
 240 {
 241         const struct v4l2_audio *p = arg;
 242
 243         if (write_only)
 244                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 245         else
 246                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 247                         p->index, (int)sizeof(p->name), p->name,
 248                         p->capability, p->mode);
 249 }
 250
 251 static void v4l_print_audioout(const void *arg, bool write_only)
 252 {
 253         const struct v4l2_audioout *p = arg;
 254
 255         if (write_only)
 256                 pr_cont("index=%u\n", p->index);
 257         else
 258                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 259                         p->index, (int)sizeof(p->name), p->name,
 260                         p->capability, p->mode);
 261 }
 262
 263 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 264 {
 265         const struct v4l2_fmtdesc *p = arg;
 266
 267         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 268                 p->index, prt_names(p->type, v4l2_type_names),
 269                 p->flags, (p->pixelformat & 0xff),
 270                 (p->pixelformat >>  8) & 0xff,
 271                 (p->pixelformat >> 16) & 0xff,
 272                 (p->pixelformat >> 24) & 0xff,
 273                 (int)sizeof(p->description), p->description);
 274 }
 275
 276 static void v4l_print_format(const void *arg, bool write_only)
 277 {
 278         const struct v4l2_format *p = arg;
 279         const struct v4l2_pix_format *pix;
 280         const struct v4l2_pix_format_mplane *mp;
 281         const struct v4l2_vbi_format *vbi;
 282         const struct v4l2_sliced_vbi_format *sliced;
 283         const struct v4l2_window *win;
 284         const struct v4l2_sdr_format *sdr;
 285         const struct v4l2_meta_format *meta;
 286         u32 planes;
 287         unsigned i;
 288
 289         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 290         switch (p->type) {
 291         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 292         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 293                 pix = &p->fmt.pix;
 294                 pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 295                         pix->width, pix->height,
 296                         (pix->pixelformat & 0xff),
 297                         (pix->pixelformat >>  8) & 0xff,
 298                         (pix->pixelformat >> 16) & 0xff,
 299                         (pix->pixelformat >> 24) & 0xff,
 300                         prt_names(pix->field, v4l2_field_names),
 301                         pix->bytesperline, pix->sizeimage,
 302                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 303                         pix->quantization, pix->xfer_func);
 304                 break;
 305         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 306         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 307                 mp = &p->fmt.pix_mp;
 308                 pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 309                         mp->width, mp->height,
 310                         (mp->pixelformat & 0xff),
 311                         (mp->pixelformat >>  8) & 0xff,
 312                         (mp->pixelformat >> 16) & 0xff,
 313                         (mp->pixelformat >> 24) & 0xff,
 314                         prt_names(mp->field, v4l2_field_names),
 315                         mp->colorspace, mp->num_planes, mp->flags,
 316                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 317                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 318                 for (i = 0; i < planes; i++)
 319                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 320                                         mp->plane_fmt[i].bytesperline,
 321                                         mp->plane_fmt[i].sizeimage);
 322                 break;
 323         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 324         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 325                 win = &p->fmt.win;
 326                 /* Note: we can't print the clip list here since the clips
 327                  * pointer is a userspace pointer, not a kernelspace
 328                  * pointer. */
 329                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n",
 330                         win->w.width, win->w.height, win->w.left, win->w.top,
 331                         prt_names(win->field, v4l2_field_names),
 332                         win->chromakey, win->clipcount, win->clips,
 333                         win->bitmap, win->global_alpha);
 334                 break;
 335         case V4L2_BUF_TYPE_VBI_CAPTURE:
 336         case V4L2_BUF_TYPE_VBI_OUTPUT:
 337                 vbi = &p->fmt.vbi;
 338                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 339                         vbi->sampling_rate, vbi->offset,
 340                         vbi->samples_per_line,
 341                         (vbi->sample_format & 0xff),
 342                         (vbi->sample_format >>  8) & 0xff,
 343                         (vbi->sample_format >> 16) & 0xff,
 344                         (vbi->sample_format >> 24) & 0xff,
 345                         vbi->start[0], vbi->start[1],
 346                         vbi->count[0], vbi->count[1]);
 347                 break;
 348         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 349         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 350                 sliced = &p->fmt.sliced;
 351                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 352                                 sliced->service_set, sliced->io_size);
 353                 for (i = 0; i < 24; i++)
 354                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 355                                 sliced->service_lines[0][i],
 356                                 sliced->service_lines[1][i]);
 357                 break;
 358         case V4L2_BUF_TYPE_SDR_CAPTURE:
 359         case V4L2_BUF_TYPE_SDR_OUTPUT:
 360                 sdr = &p->fmt.sdr;
 361                 pr_cont(", pixelformat=%c%c%c%c\n",
 362                         (sdr->pixelformat >>  0) & 0xff,
 363                         (sdr->pixelformat >>  8) & 0xff,
 364                         (sdr->pixelformat >> 16) & 0xff,
 365                         (sdr->pixelformat >> 24) & 0xff);
 366                 break;
 367         case V4L2_BUF_TYPE_META_CAPTURE:
 368         case V4L2_BUF_TYPE_META_OUTPUT:
 369                 meta = &p->fmt.meta;
 370                 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
 371                         (meta->dataformat >>  0) & 0xff,
 372                         (meta->dataformat >>  8) & 0xff,
 373                         (meta->dataformat >> 16) & 0xff,
 374                         (meta->dataformat >> 24) & 0xff,
 375                         meta->buffersize);
 376                 break;
 377         }
 378 }
 379
 380 static void v4l_print_framebuffer(const void *arg, bool write_only)
 381 {
 382         const struct v4l2_framebuffer *p = arg;
 383
 384         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 385                         p->capability, p->flags, p->base,
 386                         p->fmt.width, p->fmt.height,
 387                         (p->fmt.pixelformat & 0xff),
 388                         (p->fmt.pixelformat >>  8) & 0xff,
 389                         (p->fmt.pixelformat >> 16) & 0xff,
 390                         (p->fmt.pixelformat >> 24) & 0xff,
 391                         p->fmt.bytesperline, p->fmt.sizeimage,
 392                         p->fmt.colorspace);
 393 }
 394
 395 static void v4l_print_buftype(const void *arg, bool write_only)
 396 {
 397         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 398 }
 399
 400 static void v4l_print_modulator(const void *arg, bool write_only)
 401 {
 402         const struct v4l2_modulator *p = arg;
 403
 404         if (write_only)
 405                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 406         else
 407                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 408                         p->index, (int)sizeof(p->name), p->name, p->capability,
 409                         p->rangelow, p->rangehigh, p->txsubchans);
 410 }
 411
 412 static void v4l_print_tuner(const void *arg, bool write_only)
 413 {
 414         const struct v4l2_tuner *p = arg;
 415
 416         if (write_only)
 417                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 418         else
 419                 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",
 420                         p->index, (int)sizeof(p->name), p->name, p->type,
 421                         p->capability, p->rangelow,
 422                         p->rangehigh, p->signal, p->afc,
 423                         p->rxsubchans, p->audmode);
 424 }
 425
 426 static void v4l_print_frequency(const void *arg, bool write_only)
 427 {
 428         const struct v4l2_frequency *p = arg;
 429
 430         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 431                                 p->tuner, p->type, p->frequency);
 432 }
 433
 434 static void v4l_print_standard(const void *arg, bool write_only)
 435 {
 436         const struct v4l2_standard *p = arg;
 437
 438         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 439                 p->index,
 440                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 441                 p->frameperiod.numerator,
 442                 p->frameperiod.denominator,
 443                 p->framelines);
 444 }
 445
 446 static void v4l_print_std(const void *arg, bool write_only)
 447 {
 448         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 449 }
 450
 451 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 452 {
 453         const struct v4l2_hw_freq_seek *p = arg;
 454
 455         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 456                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 457                 p->rangelow, p->rangehigh);
 458 }
 459
 460 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 461 {
 462         const struct v4l2_requestbuffers *p = arg;
 463
 464         pr_cont("count=%d, type=%s, memory=%s\n",
 465                 p->count,
 466                 prt_names(p->type, v4l2_type_names),
 467                 prt_names(p->memory, v4l2_memory_names));
 468 }
 469
 470 static void v4l_print_buffer(const void *arg, bool write_only)
 471 {
 472         const struct v4l2_buffer *p = arg;
 473         const struct v4l2_timecode *tc = &p->timecode;
 474         const struct v4l2_plane *plane;
 475         int i;
 476
 477         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 478                         p->timestamp.tv_sec / 3600,
 479                         (int)(p->timestamp.tv_sec / 60) % 60,
 480                         (int)(p->timestamp.tv_sec % 60),
 481                         (long)p->timestamp.tv_usec,
 482                         p->index,
 483                         prt_names(p->type, v4l2_type_names), p->request_fd,
 484                         p->flags, prt_names(p->field, v4l2_field_names),
 485                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 486
 487         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 488                 pr_cont("\n");
 489                 for (i = 0; i < p->length; ++i) {
 490                         plane = &p->m.planes[i];
 491                         printk(KERN_DEBUG
 492                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 493                                 i, plane->bytesused, plane->data_offset,
 494                                 plane->m.userptr, plane->length);
 495                 }
 496         } else {
 497                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 498                         p->bytesused, p->m.userptr, p->length);
 499         }
 500
 501         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 502                         tc->hours, tc->minutes, tc->seconds,
 503                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 504 }
 505
 506 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 507 {
 508         const struct v4l2_exportbuffer *p = arg;
 509
 510         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 511                 p->fd, prt_names(p->type, v4l2_type_names),
 512                 p->index, p->plane, p->flags);
 513 }
 514
 515 static void v4l_print_create_buffers(const void *arg, bool write_only)
 516 {
 517         const struct v4l2_create_buffers *p = arg;
 518
 519         pr_cont("index=%d, count=%d, memory=%s, ",
 520                         p->index, p->count,
 521                         prt_names(p->memory, v4l2_memory_names));
 522         v4l_print_format(&p->format, write_only);
 523 }
 524
 525 static void v4l_print_streamparm(const void *arg, bool write_only)
 526 {
 527         const struct v4l2_streamparm *p = arg;
 528
 529         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 530
 531         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 532             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 533                 const struct v4l2_captureparm *c = &p->parm.capture;
 534
 535                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 536                         c->capability, c->capturemode,
 537                         c->timeperframe.numerator, c->timeperframe.denominator,
 538                         c->extendedmode, c->readbuffers);
 539         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 540                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 541                 const struct v4l2_outputparm *c = &p->parm.output;
 542
 543                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 544                         c->capability, c->outputmode,
 545                         c->timeperframe.numerator, c->timeperframe.denominator,
 546                         c->extendedmode, c->writebuffers);
 547         } else {
 548                 pr_cont("\n");
 549         }
 550 }
 551
 552 static void v4l_print_queryctrl(const void *arg, bool write_only)
 553 {
 554         const struct v4l2_queryctrl *p = arg;
 555
 556         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 557                         p->id, p->type, (int)sizeof(p->name), p->name,
 558                         p->minimum, p->maximum,
 559                         p->step, p->default_value, p->flags);
 560 }
 561
 562 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 563 {
 564         const struct v4l2_query_ext_ctrl *p = arg;
 565
 566         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",
 567                         p->id, p->type, (int)sizeof(p->name), p->name,
 568                         p->minimum, p->maximum,
 569                         p->step, p->default_value, p->flags,
 570                         p->elem_size, p->elems, p->nr_of_dims,
 571                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 572 }
 573
 574 static void v4l_print_querymenu(const void *arg, bool write_only)
 575 {
 576         const struct v4l2_querymenu *p = arg;
 577
 578         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 579 }
 580
 581 static void v4l_print_control(const void *arg, bool write_only)
 582 {
 583         const struct v4l2_control *p = arg;
 584
 585         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 586 }
 587
 588 static void v4l_print_ext_controls(const void *arg, bool write_only)
 589 {
 590         const struct v4l2_ext_controls *p = arg;
 591         int i;
 592
 593         pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 594                         p->which, p->count, p->error_idx, p->request_fd);
 595         for (i = 0; i < p->count; i++) {
 596                 if (!p->controls[i].size)
 597                         pr_cont(", id/val=0x%x/0x%x",
 598                                 p->controls[i].id, p->controls[i].value);
 599                 else
 600                         pr_cont(", id/size=0x%x/%u",
 601                                 p->controls[i].id, p->controls[i].size);
 602         }
 603         pr_cont("\n");
 604 }
 605
 606 static void v4l_print_cropcap(const void *arg, bool write_only)
 607 {
 608         const struct v4l2_cropcap *p = arg;
 609
 610         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 611                 prt_names(p->type, v4l2_type_names),
 612                 p->bounds.width, p->bounds.height,
 613                 p->bounds.left, p->bounds.top,
 614                 p->defrect.width, p->defrect.height,
 615                 p->defrect.left, p->defrect.top,
 616                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 617 }
 618
 619 static void v4l_print_crop(const void *arg, bool write_only)
 620 {
 621         const struct v4l2_crop *p = arg;
 622
 623         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 624                 prt_names(p->type, v4l2_type_names),
 625                 p->c.width, p->c.height,
 626                 p->c.left, p->c.top);
 627 }
 628
 629 static void v4l_print_selection(const void *arg, bool write_only)
 630 {
 631         const struct v4l2_selection *p = arg;
 632
 633         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 634                 prt_names(p->type, v4l2_type_names),
 635                 p->target, p->flags,
 636                 p->r.width, p->r.height, p->r.left, p->r.top);
 637 }
 638
 639 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 640 {
 641         const struct v4l2_jpegcompression *p = arg;
 642
 643         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 644                 p->quality, p->APPn, p->APP_len,
 645                 p->COM_len, p->jpeg_markers);
 646 }
 647
 648 static void v4l_print_enc_idx(const void *arg, bool write_only)
 649 {
 650         const struct v4l2_enc_idx *p = arg;
 651
 652         pr_cont("entries=%d, entries_cap=%d\n",
 653                         p->entries, p->entries_cap);
 654 }
 655
 656 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 657 {
 658         const struct v4l2_encoder_cmd *p = arg;
 659
 660         pr_cont("cmd=%d, flags=0x%x\n",
 661                         p->cmd, p->flags);
 662 }
 663
 664 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 665 {
 666         const struct v4l2_decoder_cmd *p = arg;
 667
 668         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 669
 670         if (p->cmd == V4L2_DEC_CMD_START)
 671                 pr_info("speed=%d, format=%u\n",
 672                                 p->start.speed, p->start.format);
 673         else if (p->cmd == V4L2_DEC_CMD_STOP)
 674                 pr_info("pts=%llu\n", p->stop.pts);
 675 }
 676
 677 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 678 {
 679         const struct v4l2_dbg_chip_info *p = arg;
 680
 681         pr_cont("type=%u, ", p->match.type);
 682         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 683                 pr_cont("name=%.*s, ",
 684                                 (int)sizeof(p->match.name), p->match.name);
 685         else
 686                 pr_cont("addr=%u, ", p->match.addr);
 687         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 688 }
 689
 690 static void v4l_print_dbg_register(const void *arg, bool write_only)
 691 {
 692         const struct v4l2_dbg_register *p = arg;
 693
 694         pr_cont("type=%u, ", p->match.type);
 695         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 696                 pr_cont("name=%.*s, ",
 697                                 (int)sizeof(p->match.name), p->match.name);
 698         else
 699                 pr_cont("addr=%u, ", p->match.addr);
 700         pr_cont("reg=0x%llx, val=0x%llx\n",
 701                         p->reg, p->val);
 702 }
 703
 704 static void v4l_print_dv_timings(const void *arg, bool write_only)
 705 {
 706         const struct v4l2_dv_timings *p = arg;
 707
 708         switch (p->type) {
 709         case V4L2_DV_BT_656_1120:
 710                 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",
 711                                 p->bt.interlaced, p->bt.pixelclock,
 712                                 p->bt.width, p->bt.height,
 713                                 p->bt.polarities, p->bt.hfrontporch,
 714                                 p->bt.hsync, p->bt.hbackporch,
 715                                 p->bt.vfrontporch, p->bt.vsync,
 716                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 717                                 p->bt.il_vsync, p->bt.il_vbackporch,
 718                                 p->bt.standards, p->bt.flags);
 719                 break;
 720         default:
 721                 pr_cont("type=%d\n", p->type);
 722                 break;
 723         }
 724 }
 725
 726 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 727 {
 728         const struct v4l2_enum_dv_timings *p = arg;
 729
 730         pr_cont("index=%u, ", p->index);
 731         v4l_print_dv_timings(&p->timings, write_only);
 732 }
 733
 734 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 735 {
 736         const struct v4l2_dv_timings_cap *p = arg;
 737
 738         switch (p->type) {
 739         case V4L2_DV_BT_656_1120:
 740                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 741                         p->bt.min_width, p->bt.max_width,
 742                         p->bt.min_height, p->bt.max_height,
 743                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 744                         p->bt.standards, p->bt.capabilities);
 745                 break;
 746         default:
 747                 pr_cont("type=%u\n", p->type);
 748                 break;
 749         }
 750 }
 751
 752 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 753 {
 754         const struct v4l2_frmsizeenum *p = arg;
 755
 756         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 757                         p->index,
 758                         (p->pixel_format & 0xff),
 759                         (p->pixel_format >>  8) & 0xff,
 760                         (p->pixel_format >> 16) & 0xff,
 761                         (p->pixel_format >> 24) & 0xff,
 762                         p->type);
 763         switch (p->type) {
 764         case V4L2_FRMSIZE_TYPE_DISCRETE:
 765                 pr_cont(", wxh=%ux%u\n",
 766                         p->discrete.width, p->discrete.height);
 767                 break;
 768         case V4L2_FRMSIZE_TYPE_STEPWISE:
 769                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 770                                 p->stepwise.min_width,
 771                                 p->stepwise.min_height,
 772                                 p->stepwise.max_width,
 773                                 p->stepwise.max_height,
 774                                 p->stepwise.step_width,
 775                                 p->stepwise.step_height);
 776                 break;
 777         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 778                 /* fall through */
 779         default:
 780                 pr_cont("\n");
 781                 break;
 782         }
 783 }
 784
 785 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 786 {
 787         const struct v4l2_frmivalenum *p = arg;
 788
 789         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 790                         p->index,
 791                         (p->pixel_format & 0xff),
 792                         (p->pixel_format >>  8) & 0xff,
 793                         (p->pixel_format >> 16) & 0xff,
 794                         (p->pixel_format >> 24) & 0xff,
 795                         p->width, p->height, p->type);
 796         switch (p->type) {
 797         case V4L2_FRMIVAL_TYPE_DISCRETE:
 798                 pr_cont(", fps=%d/%d\n",
 799                                 p->discrete.numerator,
 800                                 p->discrete.denominator);
 801                 break;
 802         case V4L2_FRMIVAL_TYPE_STEPWISE:
 803                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 804                                 p->stepwise.min.numerator,
 805                                 p->stepwise.min.denominator,
 806                                 p->stepwise.max.numerator,
 807                                 p->stepwise.max.denominator,
 808                                 p->stepwise.step.numerator,
 809                                 p->stepwise.step.denominator);
 810                 break;
 811         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 812                 /* fall through */
 813         default:
 814                 pr_cont("\n");
 815                 break;
 816         }
 817 }
 818
 819 static void v4l_print_event(const void *arg, bool write_only)
 820 {
 821         const struct v4l2_event *p = arg;
 822         const struct v4l2_event_ctrl *c;
 823
 824         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
 825                         p->type, p->pending, p->sequence, p->id,
 826                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 827         switch (p->type) {
 828         case V4L2_EVENT_VSYNC:
 829                 printk(KERN_DEBUG "field=%s\n",
 830                         prt_names(p->u.vsync.field, v4l2_field_names));
 831                 break;
 832         case V4L2_EVENT_CTRL:
 833                 c = &p->u.ctrl;
 834                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 835                         c->changes, c->type);
 836                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 837                         pr_cont("value64=%lld, ", c->value64);
 838                 else
 839                         pr_cont("value=%d, ", c->value);
 840                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 841                         c->flags, c->minimum, c->maximum,
 842                         c->step, c->default_value);
 843                 break;
 844         case V4L2_EVENT_FRAME_SYNC:
 845                 pr_cont("frame_sequence=%u\n",
 846                         p->u.frame_sync.frame_sequence);
 847                 break;
 848         }
 849 }
 850
 851 static void v4l_print_event_subscription(const void *arg, bool write_only)
 852 {
 853         const struct v4l2_event_subscription *p = arg;
 854
 855         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 856                         p->type, p->id, p->flags);
 857 }
 858
 859 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 860 {
 861         const struct v4l2_sliced_vbi_cap *p = arg;
 862         int i;
 863
 864         pr_cont("type=%s, service_set=0x%08x\n",
 865                         prt_names(p->type, v4l2_type_names), p->service_set);
 866         for (i = 0; i < 24; i++)
 867                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 868                                 p->service_lines[0][i],
 869                                 p->service_lines[1][i]);
 870 }
 871
 872 static void v4l_print_freq_band(const void *arg, bool write_only)
 873 {
 874         const struct v4l2_frequency_band *p = arg;
 875
 876         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 877                         p->tuner, p->type, p->index,
 878                         p->capability, p->rangelow,
 879                         p->rangehigh, p->modulation);
 880 }
 881
 882 static void v4l_print_edid(const void *arg, bool write_only)
 883 {
 884         const struct v4l2_edid *p = arg;
 885
 886         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 887                 p->pad, p->start_block, p->blocks);
 888 }
 889
 890 static void v4l_print_u32(const void *arg, bool write_only)
 891 {
 892         pr_cont("value=%u\n", *(const u32 *)arg);
 893 }
 894
 895 static void v4l_print_newline(const void *arg, bool write_only)
 896 {
 897         pr_cont("\n");
 898 }
 899
 900 static void v4l_print_default(const void *arg, bool write_only)
 901 {
 902         pr_cont("driver-specific ioctl\n");
 903 }
 904
 905 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 906 {
 907         __u32 i;
 908
 909         /* zero the reserved fields */
 910         c->reserved[0] = 0;
 911         for (i = 0; i < c->count; i++)
 912                 c->controls[i].reserved2[0] = 0;
 913
 914         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 915            when using extended controls.
 916            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 917            is it allowed for backwards compatibility.
 918          */
 919         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 920                 return 0;
 921         if (!c->which)
 922                 return 1;
 923         /* Check that all controls are from the same control class. */
 924         for (i = 0; i < c->count; i++) {
 925                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 926                         c->error_idx = i;
 927                         return 0;
 928                 }
 929         }
 930         return 1;
 931 }
 932
 933 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 934 {
 935         struct video_device *vfd = video_devdata(file);
 936         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 937         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 938         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 939         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 940         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 941         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 942         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 943
 944         if (ops == NULL)
 945                 return -EINVAL;
 946
 947         switch (type) {
 948         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 949                 if ((is_vid || is_tch) && is_rx &&
 950                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 951                         return 0;
 952                 break;
 953         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 954                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 955                         return 0;
 956                 break;
 957         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 958                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 959                         return 0;
 960                 break;
 961         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 962                 if (is_vid && is_tx &&
 963                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 964                         return 0;
 965                 break;
 966         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 967                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 968                         return 0;
 969                 break;
 970         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 971                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 972                         return 0;
 973                 break;
 974         case V4L2_BUF_TYPE_VBI_CAPTURE:
 975                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 976                         return 0;
 977                 break;
 978         case V4L2_BUF_TYPE_VBI_OUTPUT:
 979                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 980                         return 0;
 981                 break;
 982         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 983                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 984                         return 0;
 985                 break;
 986         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 987                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 988                         return 0;
 989                 break;
 990         case V4L2_BUF_TYPE_SDR_CAPTURE:
 991                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 992                         return 0;
 993                 break;
 994         case V4L2_BUF_TYPE_SDR_OUTPUT:
 995                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 996                         return 0;
 997                 break;
 998         case V4L2_BUF_TYPE_META_CAPTURE:
 999                 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap)
1000                         return 0;
1001                 break;
1002         case V4L2_BUF_TYPE_META_OUTPUT:
1003                 if (is_vid && is_tx && ops->vidioc_g_fmt_meta_out)
1004                         return 0;
1005                 break;
1006         default:
1007                 break;
1008         }
1009         return -EINVAL;
1010 }
1011
1012 static void v4l_sanitize_format(struct v4l2_format *fmt)
1013 {
1014         unsigned int offset;
1015
1016         /* Make sure num_planes is not bogus */
1017         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1018             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1019                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1020                                                VIDEO_MAX_PLANES);
1021
1022         /*
1023          * The v4l2_pix_format structure has been extended with fields that were
1024          * not previously required to be set to zero by applications. The priv
1025          * field, when set to a magic value, indicates the the extended fields
1026          * are valid. Otherwise they will contain undefined values. To simplify
1027          * the API towards drivers zero the extended fields and set the priv
1028          * field to the magic value when the extended pixel format structure
1029          * isn't used by applications.
1030          */
1031
1032         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1033             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1034                 return;
1035
1036         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1037                 return;
1038
1039         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1040
1041         offset = offsetof(struct v4l2_pix_format, priv)
1042                + sizeof(fmt->fmt.pix.priv);
1043         memset(((void *)&fmt->fmt.pix) + offset, 0,
1044                sizeof(fmt->fmt.pix) - offset);
1045 }
1046
1047 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1048                                 struct file *file, void *fh, void *arg)
1049 {
1050         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1051         struct video_device *vfd = video_devdata(file);
1052         int ret;
1053
1054         cap->version = LINUX_VERSION_CODE;
1055         cap->device_caps = vfd->device_caps;
1056         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1057
1058         ret = ops->vidioc_querycap(file, fh, cap);
1059
1060         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1061         /*
1062          * Drivers MUST fill in device_caps, so check for this and
1063          * warn if it was forgotten.
1064          */
1065         WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1066                 !cap->device_caps, "Bad caps for driver %s, %x %x",
1067                 cap->driver, cap->capabilities, cap->device_caps);
1068         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1069
1070         return ret;
1071 }
1072
1073 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1074                                 struct file *file, void *fh, void *arg)
1075 {
1076         struct video_device *vfd = video_devdata(file);
1077         int ret;
1078
1079         ret = v4l_enable_media_source(vfd);
1080         if (ret)
1081                 return ret;
1082         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1083 }
1084
1085 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1086                                 struct file *file, void *fh, void *arg)
1087 {
1088         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1089 }
1090
1091 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1092                                 struct file *file, void *fh, void *arg)
1093 {
1094         struct video_device *vfd;
1095         u32 *p = arg;
1096
1097         vfd = video_devdata(file);
1098         *p = v4l2_prio_max(vfd->prio);
1099         return 0;
1100 }
1101
1102 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1103                                 struct file *file, void *fh, void *arg)
1104 {
1105         struct video_device *vfd;
1106         struct v4l2_fh *vfh;
1107         u32 *p = arg;
1108
1109         vfd = video_devdata(file);
1110         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1111                 return -ENOTTY;
1112         vfh = file->private_data;
1113         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1114 }
1115
1116 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1117                                 struct file *file, void *fh, void *arg)
1118 {
1119         struct video_device *vfd = video_devdata(file);
1120         struct v4l2_input *p = arg;
1121
1122         /*
1123          * We set the flags for CAP_DV_TIMINGS &
1124          * CAP_STD here based on ioctl handler provided by the
1125          * driver. If the driver doesn't support these
1126          * for a specific input, it must override these flags.
1127          */
1128         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1129                 p->capabilities |= V4L2_IN_CAP_STD;
1130
1131         return ops->vidioc_enum_input(file, fh, p);
1132 }
1133
1134 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1135                                 struct file *file, void *fh, void *arg)
1136 {
1137         struct video_device *vfd = video_devdata(file);
1138         struct v4l2_output *p = arg;
1139
1140         /*
1141          * We set the flags for CAP_DV_TIMINGS &
1142          * CAP_STD here based on ioctl handler provided by the
1143          * driver. If the driver doesn't support these
1144          * for a specific output, it must override these flags.
1145          */
1146         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1147                 p->capabilities |= V4L2_OUT_CAP_STD;
1148
1149         return ops->vidioc_enum_output(file, fh, p);
1150 }
1151
1152 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1153 {
1154         const unsigned sz = sizeof(fmt->description);
1155         const char *descr = NULL;
1156         u32 flags = 0;
1157
1158         /*
1159          * We depart from the normal coding style here since the descriptions
1160          * should be aligned so it is easy to see which descriptions will be
1161          * longer than 31 characters (the max length for a description).
1162          * And frankly, this is easier to read anyway.
1163          *
1164          * Note that gcc will use O(log N) comparisons to find the right case.
1165          */
1166         switch (fmt->pixelformat) {
1167         /* Max description length mask: descr = "0123456789012345678901234567890" */
1168         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1169         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1170         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1171         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1172         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1173         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1174         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1175         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1176         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1177         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1178         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1179         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1180         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1181         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1182         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1183         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1184         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1185         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1186         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1187         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1188         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1189         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1190         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1191         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1192         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1193         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1194         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1195         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1196         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1197         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1198         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1199         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1200         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1201         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1202         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1203         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1204         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1205         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1206         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1207         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1208         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1209         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1210         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1211         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1212         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1213         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1214         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1215         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1216         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1217         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1218         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1219         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1220         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1221         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1222         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1223         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1224         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1225         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1226         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1227         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1228         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1229         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1230         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1231         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1232         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1233         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1234         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1235         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1236         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1237         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1238         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1239         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1240         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1241         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1242         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1243         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1244         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1245         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1246         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1247         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1248         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1249         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1250         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1251         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1252         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1253         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1254         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1255         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1256         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1257         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1258         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1259         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1260         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1261         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1262         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1263         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1264         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1265         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1266         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1267         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1268         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1269         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1270         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1271         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1272         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1273         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1274         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1275         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1276         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1277         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1278         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1279         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1280         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1281         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1282         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1283         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1284         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1285         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1286         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1287         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1288         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1289         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1290         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1291         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1292         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1293         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1294         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1295         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1296         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1297         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1298         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1299         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1300         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1301         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1302         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1303         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1304         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit signed deltas"; break;
1305         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit signed deltas"; break;
1306         case V4L2_TCH_FMT_TU16:         descr = "16-bit unsigned touch data"; break;
1307         case V4L2_TCH_FMT_TU08:         descr = "8-bit unsigned touch data"; break;
1308         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1309         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1310         case V4L2_META_FMT_UVC:         descr = "UVC payload header metadata"; break;
1311
1312         default:
1313                 /* Compressed formats */
1314                 flags = V4L2_FMT_FLAG_COMPRESSED;
1315                 switch (fmt->pixelformat) {
1316                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1317                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1318                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1319                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1320                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1321                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1322                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1323                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1324                 case V4L2_PIX_FMT_H264_SLICE_RAW:       descr = "H.264 Parsed Slice Data"; break;
1325                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1326                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1327                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1328                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1329                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 part 2 ES"; break;
1330                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1331                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1332                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1333                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1334                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1335                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1336                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1337                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1338                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1339                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1340                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1341                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1342                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1343                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1344                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1345                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1346                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1347                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1348                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1349                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1350                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1351                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1352                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1353                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1354                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1355                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1356                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1357                 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1358                 default:
1359                         if (fmt->description[0])
1360                                 return;
1361                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1362                         flags = 0;
1363                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1364                                         (char)(fmt->pixelformat & 0x7f),
1365                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1366                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1367                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1368                                         (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1369                         break;
1370                 }
1371         }
1372
1373         if (descr)
1374                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1375         fmt->flags = flags;
1376 }
1377
1378 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1379                                 struct file *file, void *fh, void *arg)
1380 {
1381         struct video_device *vdev = video_devdata(file);
1382         struct v4l2_fmtdesc *p = arg;
1383         int ret = check_fmt(file, p->type);
1384         u32 cap_mask;
1385
1386         if (ret)
1387                 return ret;
1388         ret = -EINVAL;
1389
1390         switch (p->type) {
1391         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1392         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1393                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1394                            V4L2_CAP_VIDEO_M2M_MPLANE;
1395                 if (!!(vdev->device_caps & cap_mask) !=
1396                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1397                         break;
1398
1399                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1400                         break;
1401                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1402                 break;
1403         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1404                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1405                         break;
1406                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1407                 break;
1408         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1409         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1410                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1411                            V4L2_CAP_VIDEO_M2M_MPLANE;
1412                 if (!!(vdev->device_caps & cap_mask) !=
1413                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1414                         break;
1415
1416                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1417                         break;
1418                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1419                 break;
1420         case V4L2_BUF_TYPE_SDR_CAPTURE:
1421                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1422                         break;
1423                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1424                 break;
1425         case V4L2_BUF_TYPE_SDR_OUTPUT:
1426                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1427                         break;
1428                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1429                 break;
1430         case V4L2_BUF_TYPE_META_CAPTURE:
1431                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1432                         break;
1433                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1434                 break;
1435         case V4L2_BUF_TYPE_META_OUTPUT:
1436                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1437                         break;
1438                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1439                 break;
1440         }
1441         if (ret == 0)
1442                 v4l_fill_fmtdesc(p);
1443         return ret;
1444 }
1445
1446 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1447                                 struct file *file, void *fh, void *arg)
1448 {
1449         struct v4l2_format *p = arg;
1450         int ret = check_fmt(file, p->type);
1451
1452         if (ret)
1453                 return ret;
1454
1455         /*
1456          * fmt can't be cleared for these overlay types due to the 'clips'
1457          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1458          * Those are provided by the user. So handle these two overlay types
1459          * first, and then just do a simple memset for the other types.
1460          */
1461         switch (p->type) {
1462         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1463         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1464                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1465                 u32 clipcount = p->fmt.win.clipcount;
1466                 void __user *bitmap = p->fmt.win.bitmap;
1467
1468                 memset(&p->fmt, 0, sizeof(p->fmt));
1469                 p->fmt.win.clips = clips;
1470                 p->fmt.win.clipcount = clipcount;
1471                 p->fmt.win.bitmap = bitmap;
1472                 break;
1473         }
1474         default:
1475                 memset(&p->fmt, 0, sizeof(p->fmt));
1476                 break;
1477         }
1478
1479         switch (p->type) {
1480         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1481                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1482                         break;
1483                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1484                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1485                 /* just in case the driver zeroed it again */
1486                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1487                 return ret;
1488         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1489                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1490         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1491                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1492         case V4L2_BUF_TYPE_VBI_CAPTURE:
1493                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1494         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1495                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1496         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1497                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1498                         break;
1499                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1500                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1501                 /* just in case the driver zeroed it again */
1502                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1503                 return ret;
1504         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1505                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1506         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1507                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1508         case V4L2_BUF_TYPE_VBI_OUTPUT:
1509                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1510         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1511                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1512         case V4L2_BUF_TYPE_SDR_CAPTURE:
1513                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1514         case V4L2_BUF_TYPE_SDR_OUTPUT:
1515                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1516         case V4L2_BUF_TYPE_META_CAPTURE:
1517                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1518         case V4L2_BUF_TYPE_META_OUTPUT:
1519                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1520         }
1521         return -EINVAL;
1522 }
1523
1524 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1525 {
1526         /*
1527          * The v4l2_pix_format structure contains fields that make no sense for
1528          * touch. Set them to default values in this case.
1529          */
1530
1531         p->field = V4L2_FIELD_NONE;
1532         p->colorspace = V4L2_COLORSPACE_RAW;
1533         p->flags = 0;
1534         p->ycbcr_enc = 0;
1535         p->quantization = 0;
1536         p->xfer_func = 0;
1537 }
1538
1539 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1540                                 struct file *file, void *fh, void *arg)
1541 {
1542         struct v4l2_format *p = arg;
1543         struct video_device *vfd = video_devdata(file);
1544         int ret = check_fmt(file, p->type);
1545         unsigned int i;
1546
1547         if (ret)
1548                 return ret;
1549
1550         ret = v4l_enable_media_source(vfd);
1551         if (ret)
1552                 return ret;
1553         v4l_sanitize_format(p);
1554
1555         switch (p->type) {
1556         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1557                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1558                         break;
1559                 CLEAR_AFTER_FIELD(p, fmt.pix);
1560                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1561                 /* just in case the driver zeroed it again */
1562                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1563                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1564                         v4l_pix_format_touch(&p->fmt.pix);
1565                 return ret;
1566         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1567                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1568                         break;
1569                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1570                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1571                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1572                                           bytesperline);
1573                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1574         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1575                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1576                         break;
1577                 CLEAR_AFTER_FIELD(p, fmt.win);
1578                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1579         case V4L2_BUF_TYPE_VBI_CAPTURE:
1580                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1581                         break;
1582                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1583                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1584         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1585                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1586                         break;
1587                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1588                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1589         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1590                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1591                         break;
1592                 CLEAR_AFTER_FIELD(p, fmt.pix);
1593                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1594                 /* just in case the driver zeroed it again */
1595                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1596                 return ret;
1597         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1598                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1599                         break;
1600                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1601                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1602                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1603                                           bytesperline);
1604                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1605         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1606                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1607                         break;
1608                 CLEAR_AFTER_FIELD(p, fmt.win);
1609                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1610         case V4L2_BUF_TYPE_VBI_OUTPUT:
1611                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1612                         break;
1613                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1614                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1615         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1616                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1617                         break;
1618                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1619                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1620         case V4L2_BUF_TYPE_SDR_CAPTURE:
1621                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1622                         break;
1623                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1624                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1625         case V4L2_BUF_TYPE_SDR_OUTPUT:
1626                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1627                         break;
1628                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1629                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1630         case V4L2_BUF_TYPE_META_CAPTURE:
1631                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1632                         break;
1633                 CLEAR_AFTER_FIELD(p, fmt.meta);
1634                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1635         case V4L2_BUF_TYPE_META_OUTPUT:
1636                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1637                         break;
1638                 CLEAR_AFTER_FIELD(p, fmt.meta);
1639                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1640         }
1641         return -EINVAL;
1642 }
1643
1644 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1645                                 struct file *file, void *fh, void *arg)
1646 {
1647         struct v4l2_format *p = arg;
1648         int ret = check_fmt(file, p->type);
1649         unsigned int i;
1650
1651         if (ret)
1652                 return ret;
1653
1654         v4l_sanitize_format(p);
1655
1656         switch (p->type) {
1657         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1658                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1659                         break;
1660                 CLEAR_AFTER_FIELD(p, fmt.pix);
1661                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1662                 /* just in case the driver zeroed it again */
1663                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1664                 return ret;
1665         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1666                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1667                         break;
1668                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1669                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1670                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1671                                           bytesperline);
1672                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1673         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1674                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1675                         break;
1676                 CLEAR_AFTER_FIELD(p, fmt.win);
1677                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1678         case V4L2_BUF_TYPE_VBI_CAPTURE:
1679                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1680                         break;
1681                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1682                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1683         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1684                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1685                         break;
1686                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1687                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1688         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1689                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1690                         break;
1691                 CLEAR_AFTER_FIELD(p, fmt.pix);
1692                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1693                 /* just in case the driver zeroed it again */
1694                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1695                 return ret;
1696         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1697                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1698                         break;
1699                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1700                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1701                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1702                                           bytesperline);
1703                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1704         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1705                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1706                         break;
1707                 CLEAR_AFTER_FIELD(p, fmt.win);
1708                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1709         case V4L2_BUF_TYPE_VBI_OUTPUT:
1710                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1711                         break;
1712                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1713                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1714         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1715                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1716                         break;
1717                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1718                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1719         case V4L2_BUF_TYPE_SDR_CAPTURE:
1720                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1721                         break;
1722                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1723                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1724         case V4L2_BUF_TYPE_SDR_OUTPUT:
1725                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1726                         break;
1727                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1728                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1729         case V4L2_BUF_TYPE_META_CAPTURE:
1730                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1731                         break;
1732                 CLEAR_AFTER_FIELD(p, fmt.meta);
1733                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1734         case V4L2_BUF_TYPE_META_OUTPUT:
1735                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1736                         break;
1737                 CLEAR_AFTER_FIELD(p, fmt.meta);
1738                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1739         }
1740         return -EINVAL;
1741 }
1742
1743 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1744                                 struct file *file, void *fh, void *arg)
1745 {
1746         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1747 }
1748
1749 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1750                                 struct file *file, void *fh, void *arg)
1751 {
1752         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1753 }
1754
1755 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1756                                 struct file *file, void *fh, void *arg)
1757 {
1758         struct video_device *vfd = video_devdata(file);
1759         struct v4l2_tuner *p = arg;
1760         int err;
1761
1762         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1763                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1764         err = ops->vidioc_g_tuner(file, fh, p);
1765         if (!err)
1766                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1767         return err;
1768 }
1769
1770 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1771                                 struct file *file, void *fh, void *arg)
1772 {
1773         struct video_device *vfd = video_devdata(file);
1774         struct v4l2_tuner *p = arg;
1775         int ret;
1776
1777         ret = v4l_enable_media_source(vfd);
1778         if (ret)
1779                 return ret;
1780         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1781                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1782         return ops->vidioc_s_tuner(file, fh, p);
1783 }
1784
1785 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1786                                 struct file *file, void *fh, void *arg)
1787 {
1788         struct video_device *vfd = video_devdata(file);
1789         struct v4l2_modulator *p = arg;
1790         int err;
1791
1792         if (vfd->vfl_type == VFL_TYPE_RADIO)
1793                 p->type = V4L2_TUNER_RADIO;
1794
1795         err = ops->vidioc_g_modulator(file, fh, p);
1796         if (!err)
1797                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1798         return err;
1799 }
1800
1801 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1802                                 struct file *file, void *fh, void *arg)
1803 {
1804         struct video_device *vfd = video_devdata(file);
1805         struct v4l2_modulator *p = arg;
1806
1807         if (vfd->vfl_type == VFL_TYPE_RADIO)
1808                 p->type = V4L2_TUNER_RADIO;
1809
1810         return ops->vidioc_s_modulator(file, fh, p);
1811 }
1812
1813 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1814                                 struct file *file, void *fh, void *arg)
1815 {
1816         struct video_device *vfd = video_devdata(file);
1817         struct v4l2_frequency *p = arg;
1818
1819         if (vfd->vfl_type == VFL_TYPE_SDR)
1820                 p->type = V4L2_TUNER_SDR;
1821         else
1822                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1823                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1824         return ops->vidioc_g_frequency(file, fh, p);
1825 }
1826
1827 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1828                                 struct file *file, void *fh, void *arg)
1829 {
1830         struct video_device *vfd = video_devdata(file);
1831         const struct v4l2_frequency *p = arg;
1832         enum v4l2_tuner_type type;
1833         int ret;
1834
1835         ret = v4l_enable_media_source(vfd);
1836         if (ret)
1837                 return ret;
1838         if (vfd->vfl_type == VFL_TYPE_SDR) {
1839                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1840                         return -EINVAL;
1841         } else {
1842                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1843                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1844                 if (type != p->type)
1845                         return -EINVAL;
1846         }
1847         return ops->vidioc_s_frequency(file, fh, p);
1848 }
1849
1850 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1851                                 struct file *file, void *fh, void *arg)
1852 {
1853         struct video_device *vfd = video_devdata(file);
1854         struct v4l2_standard *p = arg;
1855
1856         return v4l_video_std_enumstd(p, vfd->tvnorms);
1857 }
1858
1859 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1860                                 struct file *file, void *fh, void *arg)
1861 {
1862         struct video_device *vfd = video_devdata(file);
1863         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1864         int ret;
1865
1866         ret = v4l_enable_media_source(vfd);
1867         if (ret)
1868                 return ret;
1869         norm = id & vfd->tvnorms;
1870         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1871                 return -EINVAL;
1872
1873         /* Calls the specific handler */
1874         return ops->vidioc_s_std(file, fh, norm);
1875 }
1876
1877 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1878                                 struct file *file, void *fh, void *arg)
1879 {
1880         struct video_device *vfd = video_devdata(file);
1881         v4l2_std_id *p = arg;
1882         int ret;
1883
1884         ret = v4l_enable_media_source(vfd);
1885         if (ret)
1886                 return ret;
1887         /*
1888          * If no signal is detected, then the driver should return
1889          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1890          * any standards that do not apply removed.
1891          *
1892          * This means that tuners, audio and video decoders can join
1893          * their efforts to improve the standards detection.
1894          */
1895         *p = vfd->tvnorms;
1896         return ops->vidioc_querystd(file, fh, arg);
1897 }
1898
1899 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1900                                 struct file *file, void *fh, void *arg)
1901 {
1902         struct video_device *vfd = video_devdata(file);
1903         struct v4l2_hw_freq_seek *p = arg;
1904         enum v4l2_tuner_type type;
1905         int ret;
1906
1907         ret = v4l_enable_media_source(vfd);
1908         if (ret)
1909                 return ret;
1910         /* s_hw_freq_seek is not supported for SDR for now */
1911         if (vfd->vfl_type == VFL_TYPE_SDR)
1912                 return -EINVAL;
1913
1914         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1915                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1916         if (p->type != type)
1917                 return -EINVAL;
1918         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1919 }
1920
1921 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1922                                 struct file *file, void *fh, void *arg)
1923 {
1924         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1925 }
1926
1927 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1928                                 struct file *file, void *fh, void *arg)
1929 {
1930         struct v4l2_requestbuffers *p = arg;
1931         int ret = check_fmt(file, p->type);
1932
1933         if (ret)
1934                 return ret;
1935
1936         CLEAR_AFTER_FIELD(p, capabilities);
1937
1938         return ops->vidioc_reqbufs(file, fh, p);
1939 }
1940
1941 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1942                                 struct file *file, void *fh, void *arg)
1943 {
1944         struct v4l2_buffer *p = arg;
1945         int ret = check_fmt(file, p->type);
1946
1947         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1948 }
1949
1950 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1951                                 struct file *file, void *fh, void *arg)
1952 {
1953         struct v4l2_buffer *p = arg;
1954         int ret = check_fmt(file, p->type);
1955
1956         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1957 }
1958
1959 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1960                                 struct file *file, void *fh, void *arg)
1961 {
1962         struct v4l2_buffer *p = arg;
1963         int ret = check_fmt(file, p->type);
1964
1965         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1966 }
1967
1968 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1969                                 struct file *file, void *fh, void *arg)
1970 {
1971         struct v4l2_create_buffers *create = arg;
1972         int ret = check_fmt(file, create->format.type);
1973
1974         if (ret)
1975                 return ret;
1976
1977         CLEAR_AFTER_FIELD(create, capabilities);
1978
1979         v4l_sanitize_format(&create->format);
1980
1981         ret = ops->vidioc_create_bufs(file, fh, create);
1982
1983         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1984             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1985                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1986
1987         return ret;
1988 }
1989
1990 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1991                                 struct file *file, void *fh, void *arg)
1992 {
1993         struct v4l2_buffer *b = arg;
1994         int ret = check_fmt(file, b->type);
1995
1996         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1997 }
1998
1999 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2000                                 struct file *file, void *fh, void *arg)
2001 {
2002         struct v4l2_streamparm *p = arg;
2003         v4l2_std_id std;
2004         int ret = check_fmt(file, p->type);
2005
2006         if (ret)
2007                 return ret;
2008         if (ops->vidioc_g_parm)
2009                 return ops->vidioc_g_parm(file, fh, p);
2010         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2011             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2012                 return -EINVAL;
2013         p->parm.capture.readbuffers = 2;
2014         ret = ops->vidioc_g_std(file, fh, &std);
2015         if (ret == 0)
2016                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2017         return ret;
2018 }
2019
2020 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2021                                 struct file *file, void *fh, void *arg)
2022 {
2023         struct v4l2_streamparm *p = arg;
2024         int ret = check_fmt(file, p->type);
2025
2026         if (ret)
2027                 return ret;
2028
2029         /* Note: extendedmode is never used in drivers */
2030         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2031                 memset(p->parm.output.reserved, 0,
2032                        sizeof(p->parm.output.reserved));
2033                 p->parm.output.extendedmode = 0;
2034                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2035         } else {
2036                 memset(p->parm.capture.reserved, 0,
2037                        sizeof(p->parm.capture.reserved));
2038                 p->parm.capture.extendedmode = 0;
2039                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2040         }
2041         return ops->vidioc_s_parm(file, fh, p);
2042 }
2043
2044 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2045                                 struct file *file, void *fh, void *arg)
2046 {
2047         struct video_device *vfd = video_devdata(file);
2048         struct v4l2_queryctrl *p = arg;
2049         struct v4l2_fh *vfh =
2050                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2051
2052         if (vfh && vfh->ctrl_handler)
2053                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2054         if (vfd->ctrl_handler)
2055                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2056         if (ops->vidioc_queryctrl)
2057                 return ops->vidioc_queryctrl(file, fh, p);
2058         return -ENOTTY;
2059 }
2060
2061 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2062                                 struct file *file, void *fh, void *arg)
2063 {
2064         struct video_device *vfd = video_devdata(file);
2065         struct v4l2_query_ext_ctrl *p = arg;
2066         struct v4l2_fh *vfh =
2067                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2068
2069         if (vfh && vfh->ctrl_handler)
2070                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2071         if (vfd->ctrl_handler)
2072                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2073         if (ops->vidioc_query_ext_ctrl)
2074                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2075         return -ENOTTY;
2076 }
2077
2078 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2079                                 struct file *file, void *fh, void *arg)
2080 {
2081         struct video_device *vfd = video_devdata(file);
2082         struct v4l2_querymenu *p = arg;
2083         struct v4l2_fh *vfh =
2084                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2085
2086         if (vfh && vfh->ctrl_handler)
2087                 return v4l2_querymenu(vfh->ctrl_handler, p);
2088         if (vfd->ctrl_handler)
2089                 return v4l2_querymenu(vfd->ctrl_handler, p);
2090         if (ops->vidioc_querymenu)
2091                 return ops->vidioc_querymenu(file, fh, p);
2092         return -ENOTTY;
2093 }
2094
2095 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2096                                 struct file *file, void *fh, void *arg)
2097 {
2098         struct video_device *vfd = video_devdata(file);
2099         struct v4l2_control *p = arg;
2100         struct v4l2_fh *vfh =
2101                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2102         struct v4l2_ext_controls ctrls;
2103         struct v4l2_ext_control ctrl;
2104
2105         if (vfh && vfh->ctrl_handler)
2106                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2107         if (vfd->ctrl_handler)
2108                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2109         if (ops->vidioc_g_ctrl)
2110                 return ops->vidioc_g_ctrl(file, fh, p);
2111         if (ops->vidioc_g_ext_ctrls == NULL)
2112                 return -ENOTTY;
2113
2114         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2115         ctrls.count = 1;
2116         ctrls.controls = &ctrl;
2117         ctrl.id = p->id;
2118         ctrl.value = p->value;
2119         if (check_ext_ctrls(&ctrls, 1)) {
2120                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2121
2122                 if (ret == 0)
2123                         p->value = ctrl.value;
2124                 return ret;
2125         }
2126         return -EINVAL;
2127 }
2128
2129 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2130                                 struct file *file, void *fh, void *arg)
2131 {
2132         struct video_device *vfd = video_devdata(file);
2133         struct v4l2_control *p = arg;
2134         struct v4l2_fh *vfh =
2135                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2136         struct v4l2_ext_controls ctrls;
2137         struct v4l2_ext_control ctrl;
2138
2139         if (vfh && vfh->ctrl_handler)
2140                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2141         if (vfd->ctrl_handler)
2142                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2143         if (ops->vidioc_s_ctrl)
2144                 return ops->vidioc_s_ctrl(file, fh, p);
2145         if (ops->vidioc_s_ext_ctrls == NULL)
2146                 return -ENOTTY;
2147
2148         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2149         ctrls.count = 1;
2150         ctrls.controls = &ctrl;
2151         ctrl.id = p->id;
2152         ctrl.value = p->value;
2153         if (check_ext_ctrls(&ctrls, 1))
2154                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2155         return -EINVAL;
2156 }
2157
2158 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2159                                 struct file *file, void *fh, void *arg)
2160 {
2161         struct video_device *vfd = video_devdata(file);
2162         struct v4l2_ext_controls *p = arg;
2163         struct v4l2_fh *vfh =
2164                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2165
2166         p->error_idx = p->count;
2167         if (vfh && vfh->ctrl_handler)
2168                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p);
2169         if (vfd->ctrl_handler)
2170                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p);
2171         if (ops->vidioc_g_ext_ctrls == NULL)
2172                 return -ENOTTY;
2173         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2174                                         -EINVAL;
2175 }
2176
2177 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2178                                 struct file *file, void *fh, void *arg)
2179 {
2180         struct video_device *vfd = video_devdata(file);
2181         struct v4l2_ext_controls *p = arg;
2182         struct v4l2_fh *vfh =
2183                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2184
2185         p->error_idx = p->count;
2186         if (vfh && vfh->ctrl_handler)
2187                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, vfd->v4l2_dev->mdev, p);
2188         if (vfd->ctrl_handler)
2189                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, vfd->v4l2_dev->mdev, p);
2190         if (ops->vidioc_s_ext_ctrls == NULL)
2191                 return -ENOTTY;
2192         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2193                                         -EINVAL;
2194 }
2195
2196 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2197                                 struct file *file, void *fh, void *arg)
2198 {
2199         struct video_device *vfd = video_devdata(file);
2200         struct v4l2_ext_controls *p = arg;
2201         struct v4l2_fh *vfh =
2202                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2203
2204         p->error_idx = p->count;
2205         if (vfh && vfh->ctrl_handler)
2206                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p);
2207         if (vfd->ctrl_handler)
2208                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p);
2209         if (ops->vidioc_try_ext_ctrls == NULL)
2210                 return -ENOTTY;
2211         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2212                                         -EINVAL;
2213 }
2214
2215 /*
2216  * The selection API specified originally that the _MPLANE buffer types
2217  * shouldn't be used. The reasons for this are lost in the mists of time
2218  * (or just really crappy memories). Regardless, this is really annoying
2219  * for userspace. So to keep things simple we map _MPLANE buffer types
2220  * to their 'regular' counterparts before calling the driver. And we
2221  * restore it afterwards. This way applications can use either buffer
2222  * type and drivers don't need to check for both.
2223  */
2224 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2225                            struct file *file, void *fh, void *arg)
2226 {
2227         struct v4l2_selection *p = arg;
2228         u32 old_type = p->type;
2229         int ret;
2230
2231         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2232                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2233         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2234                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2235         ret = ops->vidioc_g_selection(file, fh, p);
2236         p->type = old_type;
2237         return ret;
2238 }
2239
2240 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2241                            struct file *file, void *fh, void *arg)
2242 {
2243         struct v4l2_selection *p = arg;
2244         u32 old_type = p->type;
2245         int ret;
2246
2247         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2248                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2249         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2250                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2251         ret = ops->vidioc_s_selection(file, fh, p);
2252         p->type = old_type;
2253         return ret;
2254 }
2255
2256 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2257                                 struct file *file, void *fh, void *arg)
2258 {
2259         struct video_device *vfd = video_devdata(file);
2260         struct v4l2_crop *p = arg;
2261         struct v4l2_selection s = {
2262                 .type = p->type,
2263         };
2264         int ret;
2265
2266         /* simulate capture crop using selection api */
2267
2268         /* crop means compose for output devices */
2269         if (V4L2_TYPE_IS_OUTPUT(p->type))
2270                 s.target = V4L2_SEL_TGT_COMPOSE;
2271         else
2272                 s.target = V4L2_SEL_TGT_CROP;
2273
2274         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2275                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2276                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2277
2278         ret = v4l_g_selection(ops, file, fh, &s);
2279
2280         /* copying results to old structure on success */
2281         if (!ret)
2282                 p->c = s.r;
2283         return ret;
2284 }
2285
2286 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2287                                 struct file *file, void *fh, void *arg)
2288 {
2289         struct video_device *vfd = video_devdata(file);
2290         struct v4l2_crop *p = arg;
2291         struct v4l2_selection s = {
2292                 .type = p->type,
2293                 .r = p->c,
2294         };
2295
2296         /* simulate capture crop using selection api */
2297
2298         /* crop means compose for output devices */
2299         if (V4L2_TYPE_IS_OUTPUT(p->type))
2300                 s.target = V4L2_SEL_TGT_COMPOSE;
2301         else
2302                 s.target = V4L2_SEL_TGT_CROP;
2303
2304         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2305                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2306                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2307
2308         return v4l_s_selection(ops, file, fh, &s);
2309 }
2310
2311 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2312                                 struct file *file, void *fh, void *arg)
2313 {
2314         struct video_device *vfd = video_devdata(file);
2315         struct v4l2_cropcap *p = arg;
2316         struct v4l2_selection s = { .type = p->type };
2317         int ret = 0;
2318
2319         /* setting trivial pixelaspect */
2320         p->pixelaspect.numerator = 1;
2321         p->pixelaspect.denominator = 1;
2322
2323         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2324                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2325         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2326                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2327
2328         /*
2329          * The determine_valid_ioctls() call already should ensure
2330          * that this can never happen, but just in case...
2331          */
2332         if (WARN_ON(!ops->vidioc_g_selection))
2333                 return -ENOTTY;
2334
2335         if (ops->vidioc_g_pixelaspect)
2336                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2337                                                 &p->pixelaspect);
2338
2339         /*
2340          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2341          * square pixel aspect ratio in that case.
2342          */
2343         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2344                 return ret;
2345
2346         /* Use g_selection() to fill in the bounds and defrect rectangles */
2347
2348         /* obtaining bounds */
2349         if (V4L2_TYPE_IS_OUTPUT(p->type))
2350                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2351         else
2352                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2353
2354         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2355                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2356                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2357
2358         ret = v4l_g_selection(ops, file, fh, &s);
2359         if (ret)
2360                 return ret;
2361         p->bounds = s.r;
2362
2363         /* obtaining defrect */
2364         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2365                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2366         else
2367                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2368
2369         ret = v4l_g_selection(ops, file, fh, &s);
2370         if (ret)
2371                 return ret;
2372         p->defrect = s.r;
2373
2374         return 0;
2375 }
2376
2377 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2378                                 struct file *file, void *fh, void *arg)
2379 {
2380         struct video_device *vfd = video_devdata(file);
2381         int ret;
2382
2383         if (vfd->v4l2_dev)
2384                 pr_info("%s: =================  START STATUS  =================\n",
2385                         vfd->v4l2_dev->name);
2386         ret = ops->vidioc_log_status(file, fh);
2387         if (vfd->v4l2_dev)
2388                 pr_info("%s: ==================  END STATUS  ==================\n",
2389                         vfd->v4l2_dev->name);
2390         return ret;
2391 }
2392
2393 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2394                                 struct file *file, void *fh, void *arg)
2395 {
2396 #ifdef CONFIG_VIDEO_ADV_DEBUG
2397         struct v4l2_dbg_register *p = arg;
2398         struct video_device *vfd = video_devdata(file);
2399         struct v4l2_subdev *sd;
2400         int idx = 0;
2401
2402         if (!capable(CAP_SYS_ADMIN))
2403                 return -EPERM;
2404         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2405                 if (vfd->v4l2_dev == NULL)
2406                         return -EINVAL;
2407                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2408                         if (p->match.addr == idx++)
2409                                 return v4l2_subdev_call(sd, core, g_register, p);
2410                 return -EINVAL;
2411         }
2412         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2413             (ops->vidioc_g_chip_info || p->match.addr == 0))
2414                 return ops->vidioc_g_register(file, fh, p);
2415         return -EINVAL;
2416 #else
2417         return -ENOTTY;
2418 #endif
2419 }
2420
2421 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2422                                 struct file *file, void *fh, void *arg)
2423 {
2424 #ifdef CONFIG_VIDEO_ADV_DEBUG
2425         const struct v4l2_dbg_register *p = arg;
2426         struct video_device *vfd = video_devdata(file);
2427         struct v4l2_subdev *sd;
2428         int idx = 0;
2429
2430         if (!capable(CAP_SYS_ADMIN))
2431                 return -EPERM;
2432         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2433                 if (vfd->v4l2_dev == NULL)
2434                         return -EINVAL;
2435                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2436                         if (p->match.addr == idx++)
2437                                 return v4l2_subdev_call(sd, core, s_register, p);
2438                 return -EINVAL;
2439         }
2440         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2441             (ops->vidioc_g_chip_info || p->match.addr == 0))
2442                 return ops->vidioc_s_register(file, fh, p);
2443         return -EINVAL;
2444 #else
2445         return -ENOTTY;
2446 #endif
2447 }
2448
2449 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2450                                 struct file *file, void *fh, void *arg)
2451 {
2452 #ifdef CONFIG_VIDEO_ADV_DEBUG
2453         struct video_device *vfd = video_devdata(file);
2454         struct v4l2_dbg_chip_info *p = arg;
2455         struct v4l2_subdev *sd;
2456         int idx = 0;
2457
2458         switch (p->match.type) {
2459         case V4L2_CHIP_MATCH_BRIDGE:
2460                 if (ops->vidioc_s_register)
2461                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2462                 if (ops->vidioc_g_register)
2463                         p->flags |= V4L2_CHIP_FL_READABLE;
2464                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2465                 if (ops->vidioc_g_chip_info)
2466                         return ops->vidioc_g_chip_info(file, fh, arg);
2467                 if (p->match.addr)
2468                         return -EINVAL;
2469                 return 0;
2470
2471         case V4L2_CHIP_MATCH_SUBDEV:
2472                 if (vfd->v4l2_dev == NULL)
2473                         break;
2474                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2475                         if (p->match.addr != idx++)
2476                                 continue;
2477                         if (sd->ops->core && sd->ops->core->s_register)
2478                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2479                         if (sd->ops->core && sd->ops->core->g_register)
2480                                 p->flags |= V4L2_CHIP_FL_READABLE;
2481                         strscpy(p->name, sd->name, sizeof(p->name));
2482                         return 0;
2483                 }
2484                 break;
2485         }
2486         return -EINVAL;
2487 #else
2488         return -ENOTTY;
2489 #endif
2490 }
2491
2492 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2493                                 struct file *file, void *fh, void *arg)
2494 {
2495         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2496 }
2497
2498 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2499                                 struct file *file, void *fh, void *arg)
2500 {
2501         return ops->vidioc_subscribe_event(fh, arg);
2502 }
2503
2504 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2505                                 struct file *file, void *fh, void *arg)
2506 {
2507         return ops->vidioc_unsubscribe_event(fh, arg);
2508 }
2509
2510 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2511                                 struct file *file, void *fh, void *arg)
2512 {
2513         struct v4l2_sliced_vbi_cap *p = arg;
2514         int ret = check_fmt(file, p->type);
2515
2516         if (ret)
2517                 return ret;
2518
2519         /* Clear up to type, everything after type is zeroed already */
2520         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2521
2522         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2523 }
2524
2525 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2526                                 struct file *file, void *fh, void *arg)
2527 {
2528         struct video_device *vfd = video_devdata(file);
2529         struct v4l2_frequency_band *p = arg;
2530         enum v4l2_tuner_type type;
2531         int err;
2532
2533         if (vfd->vfl_type == VFL_TYPE_SDR) {
2534                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2535                         return -EINVAL;
2536                 type = p->type;
2537         } else {
2538                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2539                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2540                 if (type != p->type)
2541                         return -EINVAL;
2542         }
2543         if (ops->vidioc_enum_freq_bands) {
2544                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2545                 if (err != -ENOTTY)
2546                         return err;
2547         }
2548         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2549                 struct v4l2_tuner t = {
2550                         .index = p->tuner,
2551                         .type = type,
2552                 };
2553
2554                 if (p->index)
2555                         return -EINVAL;
2556                 err = ops->vidioc_g_tuner(file, fh, &t);
2557                 if (err)
2558                         return err;
2559                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2560                 p->rangelow = t.rangelow;
2561                 p->rangehigh = t.rangehigh;
2562                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2563                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2564                 return 0;
2565         }
2566         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2567                 struct v4l2_modulator m = {
2568                         .index = p->tuner,
2569                 };
2570
2571                 if (type != V4L2_TUNER_RADIO)
2572                         return -EINVAL;
2573                 if (p->index)
2574                         return -EINVAL;
2575                 err = ops->vidioc_g_modulator(file, fh, &m);
2576                 if (err)
2577                         return err;
2578                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2579                 p->rangelow = m.rangelow;
2580                 p->rangehigh = m.rangehigh;
2581                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2582                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2583                 return 0;
2584         }
2585         return -ENOTTY;
2586 }
2587
2588 struct v4l2_ioctl_info {
2589         unsigned int ioctl;
2590         u32 flags;
2591         const char * const name;
2592         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2593                     void *fh, void *p);
2594         void (*debug)(const void *arg, bool write_only);
2595 };
2596
2597 /* This control needs a priority check */
2598 #define INFO_FL_PRIO            (1 << 0)
2599 /* This control can be valid if the filehandle passes a control handler. */
2600 #define INFO_FL_CTRL            (1 << 1)
2601 /* Queuing ioctl */
2602 #define INFO_FL_QUEUE           (1 << 2)
2603 /* Always copy back result, even on error */
2604 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2605 /* Zero struct from after the field to the end */
2606 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2607         ((offsetof(struct v4l2_struct, field) +                 \
2608           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2609 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2610
2611 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2612         static int v4l_stub_ ## _vidioc(                        \
2613                         const struct v4l2_ioctl_ops *ops,       \
2614                         struct file *file, void *fh, void *p)   \
2615         {                                                       \
2616                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2617         }
2618
2619 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2620         [_IOC_NR(_ioctl)] = {                                   \
2621                 .ioctl = _ioctl,                                \
2622                 .flags = _flags,                                \
2623                 .name = #_ioctl,                                \
2624                 .func = _func,                                  \
2625                 .debug = _debug,                                \
2626         }
2627
2628 DEFINE_V4L_STUB_FUNC(g_fbuf)
2629 DEFINE_V4L_STUB_FUNC(s_fbuf)
2630 DEFINE_V4L_STUB_FUNC(expbuf)
2631 DEFINE_V4L_STUB_FUNC(g_std)
2632 DEFINE_V4L_STUB_FUNC(g_audio)
2633 DEFINE_V4L_STUB_FUNC(s_audio)
2634 DEFINE_V4L_STUB_FUNC(g_input)
2635 DEFINE_V4L_STUB_FUNC(g_edid)
2636 DEFINE_V4L_STUB_FUNC(s_edid)
2637 DEFINE_V4L_STUB_FUNC(g_output)
2638 DEFINE_V4L_STUB_FUNC(g_audout)
2639 DEFINE_V4L_STUB_FUNC(s_audout)
2640 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2641 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2642 DEFINE_V4L_STUB_FUNC(enumaudio)
2643 DEFINE_V4L_STUB_FUNC(enumaudout)
2644 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2645 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2646 DEFINE_V4L_STUB_FUNC(g_enc_index)
2647 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2648 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2649 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2650 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2651 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2652 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2653 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2654 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2655 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2656
2657 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2658         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2659         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2660         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2661         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2662         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2663         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2664         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2665         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2666         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2667         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2668         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2669         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2670         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2671         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2672         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2673         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2674         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2675         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2676         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2677         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2678         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2679         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2680         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2681         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2682         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2683         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2684         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2685         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2686         IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0),
2687         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2688         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2689         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2690         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0),
2691         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2692         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2693         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2694         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2695         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2696         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2697         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2698         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2699         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2700         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2701         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2702         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2703         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2704         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2705         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2706         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2707         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2708         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2709         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2710         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2711         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2712         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)),
2713         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2714         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2715         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2716         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2717         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2718         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2719         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2720         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2721         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2722         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2723         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2724         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2725         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2726         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2727         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)),
2728         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2729         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2730         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2731         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2732         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2733         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2734         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2735         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2736         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2737         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2738         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)),
2739         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)),
2740 };
2741 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2742
2743 static bool v4l2_is_known_ioctl(unsigned int cmd)
2744 {
2745         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2746                 return false;
2747         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2748 }
2749
2750 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2751                                          struct v4l2_fh *vfh, unsigned int cmd,
2752                                          void *arg)
2753 {
2754         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2755                 return vdev->lock;
2756 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
2757         if (vfh && vfh->m2m_ctx &&
2758             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2759                 if (vfh->m2m_ctx->q_lock)
2760                         return vfh->m2m_ctx->q_lock;
2761         }
2762 #endif
2763         if (vdev->queue && vdev->queue->lock &&
2764                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2765                 return vdev->queue->lock;
2766         return vdev->lock;
2767 }
2768
2769 /* Common ioctl debug function. This function can be used by
2770    external ioctl messages as well as internal V4L ioctl */
2771 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2772 {
2773         const char *dir, *type;
2774
2775         if (prefix)
2776                 printk(KERN_DEBUG "%s: ", prefix);
2777
2778         switch (_IOC_TYPE(cmd)) {
2779         case 'd':
2780                 type = "v4l2_int";
2781                 break;
2782         case 'V':
2783                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2784                         type = "v4l2";
2785                         break;
2786                 }
2787                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2788                 return;
2789         default:
2790                 type = "unknown";
2791                 break;
2792         }
2793
2794         switch (_IOC_DIR(cmd)) {
2795         case _IOC_NONE:              dir = "--"; break;
2796         case _IOC_READ:              dir = "r-"; break;
2797         case _IOC_WRITE:             dir = "-w"; break;
2798         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2799         default:                     dir = "*ERR*"; break;
2800         }
2801         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2802                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2803 }
2804 EXPORT_SYMBOL(v4l_printk_ioctl);
2805
2806 static long __video_do_ioctl(struct file *file,
2807                 unsigned int cmd, void *arg)
2808 {
2809         struct video_device *vfd = video_devdata(file);
2810         struct mutex *req_queue_lock = NULL;
2811         struct mutex *lock; /* ioctl serialization mutex */
2812         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2813         bool write_only = false;
2814         struct v4l2_ioctl_info default_info;
2815         const struct v4l2_ioctl_info *info;
2816         void *fh = file->private_data;
2817         struct v4l2_fh *vfh = NULL;
2818         int dev_debug = vfd->dev_debug;
2819         long ret = -ENOTTY;
2820
2821         if (ops == NULL) {
2822                 pr_warn("%s: has no ioctl_ops.\n",
2823                                 video_device_node_name(vfd));
2824                 return ret;
2825         }
2826
2827         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2828                 vfh = file->private_data;
2829
2830         /*
2831          * We need to serialize streamon/off with queueing new requests.
2832          * These ioctls may trigger the cancellation of a streaming
2833          * operation, and that should not be mixed with queueing a new
2834          * request at the same time.
2835          */
2836         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2837             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2838                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2839
2840                 if (mutex_lock_interruptible(req_queue_lock))
2841                         return -ERESTARTSYS;
2842         }
2843
2844         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2845
2846         if (lock && mutex_lock_interruptible(lock)) {
2847                 if (req_queue_lock)
2848                         mutex_unlock(req_queue_lock);
2849                 return -ERESTARTSYS;
2850         }
2851
2852         if (!video_is_registered(vfd)) {
2853                 ret = -ENODEV;
2854                 goto unlock;
2855         }
2856
2857         if (v4l2_is_known_ioctl(cmd)) {
2858                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2859
2860                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2861                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2862                         goto done;
2863
2864                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2865                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2866                         if (ret)
2867                                 goto done;
2868                 }
2869         } else {
2870                 default_info.ioctl = cmd;
2871                 default_info.flags = 0;
2872                 default_info.debug = v4l_print_default;
2873                 info = &default_info;
2874         }
2875
2876         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2877         if (info != &default_info) {
2878                 ret = info->func(ops, file, fh, arg);
2879         } else if (!ops->vidioc_default) {
2880                 ret = -ENOTTY;
2881         } else {
2882                 ret = ops->vidioc_default(file, fh,
2883                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2884                         cmd, arg);
2885         }
2886
2887 done:
2888         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2889                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2890                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2891                         goto unlock;
2892
2893                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2894                 if (ret < 0)
2895                         pr_cont(": error %ld", ret);
2896                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2897                         pr_cont("\n");
2898                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2899                         info->debug(arg, write_only);
2900                 else {
2901                         pr_cont(": ");
2902                         info->debug(arg, write_only);
2903                 }
2904         }
2905
2906 unlock:
2907         if (lock)
2908                 mutex_unlock(lock);
2909         if (req_queue_lock)
2910                 mutex_unlock(req_queue_lock);
2911         return ret;
2912 }
2913
2914 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2915                             void __user **user_ptr, void ***kernel_ptr)
2916 {
2917         int ret = 0;
2918
2919         switch (cmd) {
2920         case VIDIOC_PREPARE_BUF:
2921         case VIDIOC_QUERYBUF:
2922         case VIDIOC_QBUF:
2923         case VIDIOC_DQBUF: {
2924                 struct v4l2_buffer *buf = parg;
2925
2926                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2927                         if (buf->length > VIDEO_MAX_PLANES) {
2928                                 ret = -EINVAL;
2929                                 break;
2930                         }
2931                         *user_ptr = (void __user *)buf->m.planes;
2932                         *kernel_ptr = (void **)&buf->m.planes;
2933                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2934                         ret = 1;
2935                 }
2936                 break;
2937         }
2938
2939         case VIDIOC_G_EDID:
2940         case VIDIOC_S_EDID: {
2941                 struct v4l2_edid *edid = parg;
2942
2943                 if (edid->blocks) {
2944                         if (edid->blocks > 256) {
2945                                 ret = -EINVAL;
2946                                 break;
2947                         }
2948                         *user_ptr = (void __user *)edid->edid;
2949                         *kernel_ptr = (void **)&edid->edid;
2950                         *array_size = edid->blocks * 128;
2951                         ret = 1;
2952                 }
2953                 break;
2954         }
2955
2956         case VIDIOC_S_EXT_CTRLS:
2957         case VIDIOC_G_EXT_CTRLS:
2958         case VIDIOC_TRY_EXT_CTRLS: {
2959                 struct v4l2_ext_controls *ctrls = parg;
2960
2961                 if (ctrls->count != 0) {
2962                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2963                                 ret = -EINVAL;
2964                                 break;
2965                         }
2966                         *user_ptr = (void __user *)ctrls->controls;
2967                         *kernel_ptr = (void **)&ctrls->controls;
2968                         *array_size = sizeof(struct v4l2_ext_control)
2969                                     * ctrls->count;
2970                         ret = 1;
2971                 }
2972                 break;
2973         }
2974         }
2975
2976         return ret;
2977 }
2978
2979 long
2980 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2981                v4l2_kioctl func)
2982 {
2983         char    sbuf[128];
2984         void    *mbuf = NULL;
2985         void    *parg = (void *)arg;
2986         long    err  = -EINVAL;
2987         bool    has_array_args;
2988         bool    always_copy = false;
2989         size_t  array_size = 0;
2990         void __user *user_ptr = NULL;
2991         void    **kernel_ptr = NULL;
2992         const size_t ioc_size = _IOC_SIZE(cmd);
2993
2994         /*  Copy arguments into temp kernel buffer  */
2995         if (_IOC_DIR(cmd) != _IOC_NONE) {
2996                 if (ioc_size <= sizeof(sbuf)) {
2997                         parg = sbuf;
2998                 } else {
2999                         /* too big to allocate from stack */
3000                         mbuf = kvmalloc(ioc_size, GFP_KERNEL);
3001                         if (NULL == mbuf)
3002                                 return -ENOMEM;
3003                         parg = mbuf;
3004                 }
3005
3006                 err = -EFAULT;
3007                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
3008                         unsigned int n = ioc_size;
3009
3010                         /*
3011                          * In some cases, only a few fields are used as input,
3012                          * i.e. when the app sets "index" and then the driver
3013                          * fills in the rest of the structure for the thing
3014                          * with that index.  We only need to copy up the first
3015                          * non-input field.
3016                          */
3017                         if (v4l2_is_known_ioctl(cmd)) {
3018                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
3019
3020                                 if (flags & INFO_FL_CLEAR_MASK)
3021                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3022                                 always_copy = flags & INFO_FL_ALWAYS_COPY;
3023                         }
3024
3025                         if (copy_from_user(parg, (void __user *)arg, n))
3026                                 goto out;
3027
3028                         /* zero out anything we don't copy from userspace */
3029                         if (n < ioc_size)
3030                                 memset((u8 *)parg + n, 0, ioc_size - n);
3031                 } else {
3032                         /* read-only ioctl */
3033                         memset(parg, 0, ioc_size);
3034                 }
3035         }
3036
3037         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3038         if (err < 0)
3039                 goto out;
3040         has_array_args = err;
3041
3042         if (has_array_args) {
3043                 /*
3044                  * When adding new types of array args, make sure that the
3045                  * parent argument to ioctl (which contains the pointer to the
3046                  * array) fits into sbuf (so that mbuf will still remain
3047                  * unused up to here).
3048                  */
3049                 mbuf = kvmalloc(array_size, GFP_KERNEL);
3050                 err = -ENOMEM;
3051                 if (NULL == mbuf)
3052                         goto out_array_args;
3053                 err = -EFAULT;
3054                 if (copy_from_user(mbuf, user_ptr, array_size))
3055                         goto out_array_args;
3056                 *kernel_ptr = mbuf;
3057         }
3058
3059         /* Handles IOCTL */
3060         err = func(file, cmd, parg);
3061         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3062                 err = -ENOTTY;
3063                 goto out;
3064         }
3065
3066         if (err == 0) {
3067                 if (cmd == VIDIOC_DQBUF)
3068                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3069                 else if (cmd == VIDIOC_QBUF)
3070                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3071         }
3072
3073         if (has_array_args) {
3074                 *kernel_ptr = (void __force *)user_ptr;
3075                 if (copy_to_user(user_ptr, mbuf, array_size))
3076                         err = -EFAULT;
3077                 goto out_array_args;
3078         }
3079         /*
3080          * Some ioctls can return an error, but still have valid
3081          * results that must be returned.
3082          */
3083         if (err < 0 && !always_copy)
3084                 goto out;
3085
3086 out_array_args:
3087         /*  Copy results into user buffer  */
3088         switch (_IOC_DIR(cmd)) {
3089         case _IOC_READ:
3090         case (_IOC_WRITE | _IOC_READ):
3091                 if (copy_to_user((void __user *)arg, parg, ioc_size))
3092                         err = -EFAULT;
3093                 break;
3094         }
3095
3096 out:
3097         kvfree(mbuf);
3098         return err;
3099 }
3100
3101 long video_ioctl2(struct file *file,
3102                unsigned int cmd, unsigned long arg)
3103 {
3104         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3105 }
3106 EXPORT_SYMBOL(video_ioctl2);