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, <alan@lxorguk.ukuu.org.uk> (version 1)
   8  *              Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
   9  */
  10
  11 #include <linux/compat.h>
  12 #include <linux/mm.h>
  13 #include <linux/module.h>
  14 #include <linux/slab.h>
  15 #include <linux/types.h>
  16 #include <linux/kernel.h>
  17 #include <linux/version.h>
  18
  19 #include <linux/videodev2.h>
  20
  21 #include <media/v4l2-common.h>
  22 #include <media/v4l2-ioctl.h>
  23 #include <media/v4l2-ctrls.h>
  24 #include <media/v4l2-fh.h>
  25 #include <media/v4l2-event.h>
  26 #include <media/v4l2-device.h>
  27 #include <media/videobuf2-v4l2.h>
  28 #include <media/v4l2-mc.h>
  29 #include <media/v4l2-mem2mem.h>
  30
  31 #include <trace/events/v4l2.h>
  32
  33 /* Zero out the end of the struct pointed to by p.  Everything after, but
  34  * not including, the specified field is cleared. */
  35 #define CLEAR_AFTER_FIELD(p, field) \
  36         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  37         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  38
  39 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  40
  41 struct std_descr {
  42         v4l2_std_id std;
  43         const char *descr;
  44 };
  45
  46 static const struct std_descr standards[] = {
  47         { V4L2_STD_NTSC,        "NTSC"      },
  48         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  49         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  50         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  51         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  52         { V4L2_STD_PAL,         "PAL"       },
  53         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  54         { V4L2_STD_PAL_B,       "PAL-B"     },
  55         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  56         { V4L2_STD_PAL_G,       "PAL-G"     },
  57         { V4L2_STD_PAL_H,       "PAL-H"     },
  58         { V4L2_STD_PAL_I,       "PAL-I"     },
  59         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  60         { V4L2_STD_PAL_D,       "PAL-D"     },
  61         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  62         { V4L2_STD_PAL_K,       "PAL-K"     },
  63         { V4L2_STD_PAL_M,       "PAL-M"     },
  64         { V4L2_STD_PAL_N,       "PAL-N"     },
  65         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  66         { V4L2_STD_PAL_60,      "PAL-60"    },
  67         { V4L2_STD_SECAM,       "SECAM"     },
  68         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  69         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  70         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  71         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  72         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  73         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  74         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  75         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  76         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  77         { 0,                    "Unknown"   }
  78 };
  79
  80 /* video4linux standard ID conversion to standard name
  81  */
  82 const char *v4l2_norm_to_name(v4l2_std_id id)
  83 {
  84         u32 myid = id;
  85         int i;
  86
  87         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  88            64 bit comparisons. So, on that architecture, with some gcc
  89            variants, compilation fails. Currently, the max value is 30bit wide.
  90          */
  91         BUG_ON(myid != id);
  92
  93         for (i = 0; standards[i].std; i++)
  94                 if (myid == standards[i].std)
  95                         break;
  96         return standards[i].descr;
  97 }
  98 EXPORT_SYMBOL(v4l2_norm_to_name);
  99
 100 /* Returns frame period for the given standard */
 101 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 102 {
 103         if (id & V4L2_STD_525_60) {
 104                 frameperiod->numerator = 1001;
 105                 frameperiod->denominator = 30000;
 106         } else {
 107                 frameperiod->numerator = 1;
 108                 frameperiod->denominator = 25;
 109         }
 110 }
 111 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 112
 113 /* Fill in the fields of a v4l2_standard structure according to the
 114    'id' and 'transmission' parameters.  Returns negative on error.  */
 115 int v4l2_video_std_construct(struct v4l2_standard *vs,
 116                              int id, const char *name)
 117 {
 118         vs->id = id;
 119         v4l2_video_std_frame_period(id, &vs->frameperiod);
 120         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 121         strscpy(vs->name, name, sizeof(vs->name));
 122         return 0;
 123 }
 124 EXPORT_SYMBOL(v4l2_video_std_construct);
 125
 126 /* Fill in the fields of a v4l2_standard structure according to the
 127  * 'id' and 'vs->index' parameters. Returns negative on error. */
 128 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 129 {
 130         v4l2_std_id curr_id = 0;
 131         unsigned int index = vs->index, i, j = 0;
 132         const char *descr = "";
 133
 134         /* Return -ENODATA if the id for the current input
 135            or output is 0, meaning that it doesn't support this API. */
 136         if (id == 0)
 137                 return -ENODATA;
 138
 139         /* Return norm array in a canonical way */
 140         for (i = 0; i <= index && id; i++) {
 141                 /* last std value in the standards array is 0, so this
 142                    while always ends there since (id & 0) == 0. */
 143                 while ((id & standards[j].std) != standards[j].std)
 144                         j++;
 145                 curr_id = standards[j].std;
 146                 descr = standards[j].descr;
 147                 j++;
 148                 if (curr_id == 0)
 149                         break;
 150                 if (curr_id != V4L2_STD_PAL &&
 151                                 curr_id != V4L2_STD_SECAM &&
 152                                 curr_id != V4L2_STD_NTSC)
 153                         id &= ~curr_id;
 154         }
 155         if (i <= index)
 156                 return -EINVAL;
 157
 158         v4l2_video_std_construct(vs, curr_id, descr);
 159         return 0;
 160 }
 161
 162 /* ----------------------------------------------------------------- */
 163 /* some arrays for pretty-printing debug messages of enum types      */
 164
 165 const char *v4l2_field_names[] = {
 166         [V4L2_FIELD_ANY]        = "any",
 167         [V4L2_FIELD_NONE]       = "none",
 168         [V4L2_FIELD_TOP]        = "top",
 169         [V4L2_FIELD_BOTTOM]     = "bottom",
 170         [V4L2_FIELD_INTERLACED] = "interlaced",
 171         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 172         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 173         [V4L2_FIELD_ALTERNATE]  = "alternate",
 174         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 175         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 176 };
 177 EXPORT_SYMBOL(v4l2_field_names);
 178
 179 const char *v4l2_type_names[] = {
 180         [0]                                = "0",
 181         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 182         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 183         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 184         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 185         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 186         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 187         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 188         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 189         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 190         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 191         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 192         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 193         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 194         [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 195 };
 196 EXPORT_SYMBOL(v4l2_type_names);
 197
 198 static const char *v4l2_memory_names[] = {
 199         [V4L2_MEMORY_MMAP]    = "mmap",
 200         [V4L2_MEMORY_USERPTR] = "userptr",
 201         [V4L2_MEMORY_OVERLAY] = "overlay",
 202         [V4L2_MEMORY_DMABUF] = "dmabuf",
 203 };
 204
 205 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 206
 207 /* ------------------------------------------------------------------ */
 208 /* debug help functions                                               */
 209
 210 static void v4l_print_querycap(const void *arg, bool write_only)
 211 {
 212         const struct v4l2_capability *p = arg;
 213
 214         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 215                 (int)sizeof(p->driver), p->driver,
 216                 (int)sizeof(p->card), p->card,
 217                 (int)sizeof(p->bus_info), p->bus_info,
 218                 p->version, p->capabilities, p->device_caps);
 219 }
 220
 221 static void v4l_print_enuminput(const void *arg, bool write_only)
 222 {
 223         const struct v4l2_input *p = arg;
 224
 225         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 226                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 227                 p->tuner, (unsigned long long)p->std, p->status,
 228                 p->capabilities);
 229 }
 230
 231 static void v4l_print_enumoutput(const void *arg, bool write_only)
 232 {
 233         const struct v4l2_output *p = arg;
 234
 235         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 236                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 237                 p->modulator, (unsigned long long)p->std, p->capabilities);
 238 }
 239
 240 static void v4l_print_audio(const void *arg, bool write_only)
 241 {
 242         const struct v4l2_audio *p = arg;
 243
 244         if (write_only)
 245                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 246         else
 247                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 248                         p->index, (int)sizeof(p->name), p->name,
 249                         p->capability, p->mode);
 250 }
 251
 252 static void v4l_print_audioout(const void *arg, bool write_only)
 253 {
 254         const struct v4l2_audioout *p = arg;
 255
 256         if (write_only)
 257                 pr_cont("index=%u\n", p->index);
 258         else
 259                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 260                         p->index, (int)sizeof(p->name), p->name,
 261                         p->capability, p->mode);
 262 }
 263
 264 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 265 {
 266         const struct v4l2_fmtdesc *p = arg;
 267
 268         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, mbus_code=0x%04x, description='%.*s'\n",
 269                 p->index, prt_names(p->type, v4l2_type_names),
 270                 p->flags, (p->pixelformat & 0xff),
 271                 (p->pixelformat >>  8) & 0xff,
 272                 (p->pixelformat >> 16) & 0xff,
 273                 (p->pixelformat >> 24) & 0xff,
 274                 p->mbus_code,
 275                 (int)sizeof(p->description), p->description);
 276 }
 277
 278 static void v4l_print_format(const void *arg, bool write_only)
 279 {
 280         const struct v4l2_format *p = arg;
 281         const struct v4l2_pix_format *pix;
 282         const struct v4l2_pix_format_mplane *mp;
 283         const struct v4l2_vbi_format *vbi;
 284         const struct v4l2_sliced_vbi_format *sliced;
 285         const struct v4l2_window *win;
 286         const struct v4l2_sdr_format *sdr;
 287         const struct v4l2_meta_format *meta;
 288         u32 planes;
 289         unsigned i;
 290
 291         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 292         switch (p->type) {
 293         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 294         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 295                 pix = &p->fmt.pix;
 296                 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",
 297                         pix->width, pix->height,
 298                         (pix->pixelformat & 0xff),
 299                         (pix->pixelformat >>  8) & 0xff,
 300                         (pix->pixelformat >> 16) & 0xff,
 301                         (pix->pixelformat >> 24) & 0xff,
 302                         prt_names(pix->field, v4l2_field_names),
 303                         pix->bytesperline, pix->sizeimage,
 304                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 305                         pix->quantization, pix->xfer_func);
 306                 break;
 307         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 308         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 309                 mp = &p->fmt.pix_mp;
 310                 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",
 311                         mp->width, mp->height,
 312                         (mp->pixelformat & 0xff),
 313                         (mp->pixelformat >>  8) & 0xff,
 314                         (mp->pixelformat >> 16) & 0xff,
 315                         (mp->pixelformat >> 24) & 0xff,
 316                         prt_names(mp->field, v4l2_field_names),
 317                         mp->colorspace, mp->num_planes, mp->flags,
 318                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 319                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 320                 for (i = 0; i < planes; i++)
 321                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 322                                         mp->plane_fmt[i].bytesperline,
 323                                         mp->plane_fmt[i].sizeimage);
 324                 break;
 325         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 326         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 327                 win = &p->fmt.win;
 328                 /* Note: we can't print the clip list here since the clips
 329                  * pointer is a userspace pointer, not a kernelspace
 330                  * pointer. */
 331                 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",
 332                         win->w.width, win->w.height, win->w.left, win->w.top,
 333                         prt_names(win->field, v4l2_field_names),
 334                         win->chromakey, win->clipcount, win->clips,
 335                         win->bitmap, win->global_alpha);
 336                 break;
 337         case V4L2_BUF_TYPE_VBI_CAPTURE:
 338         case V4L2_BUF_TYPE_VBI_OUTPUT:
 339                 vbi = &p->fmt.vbi;
 340                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 341                         vbi->sampling_rate, vbi->offset,
 342                         vbi->samples_per_line,
 343                         (vbi->sample_format & 0xff),
 344                         (vbi->sample_format >>  8) & 0xff,
 345                         (vbi->sample_format >> 16) & 0xff,
 346                         (vbi->sample_format >> 24) & 0xff,
 347                         vbi->start[0], vbi->start[1],
 348                         vbi->count[0], vbi->count[1]);
 349                 break;
 350         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 351         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 352                 sliced = &p->fmt.sliced;
 353                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 354                                 sliced->service_set, sliced->io_size);
 355                 for (i = 0; i < 24; i++)
 356                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 357                                 sliced->service_lines[0][i],
 358                                 sliced->service_lines[1][i]);
 359                 break;
 360         case V4L2_BUF_TYPE_SDR_CAPTURE:
 361         case V4L2_BUF_TYPE_SDR_OUTPUT:
 362                 sdr = &p->fmt.sdr;
 363                 pr_cont(", pixelformat=%c%c%c%c\n",
 364                         (sdr->pixelformat >>  0) & 0xff,
 365                         (sdr->pixelformat >>  8) & 0xff,
 366                         (sdr->pixelformat >> 16) & 0xff,
 367                         (sdr->pixelformat >> 24) & 0xff);
 368                 break;
 369         case V4L2_BUF_TYPE_META_CAPTURE:
 370         case V4L2_BUF_TYPE_META_OUTPUT:
 371                 meta = &p->fmt.meta;
 372                 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
 373                         (meta->dataformat >>  0) & 0xff,
 374                         (meta->dataformat >>  8) & 0xff,
 375                         (meta->dataformat >> 16) & 0xff,
 376                         (meta->dataformat >> 24) & 0xff,
 377                         meta->buffersize);
 378                 break;
 379         }
 380 }
 381
 382 static void v4l_print_framebuffer(const void *arg, bool write_only)
 383 {
 384         const struct v4l2_framebuffer *p = arg;
 385
 386         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",
 387                         p->capability, p->flags, p->base,
 388                         p->fmt.width, p->fmt.height,
 389                         (p->fmt.pixelformat & 0xff),
 390                         (p->fmt.pixelformat >>  8) & 0xff,
 391                         (p->fmt.pixelformat >> 16) & 0xff,
 392                         (p->fmt.pixelformat >> 24) & 0xff,
 393                         p->fmt.bytesperline, p->fmt.sizeimage,
 394                         p->fmt.colorspace);
 395 }
 396
 397 static void v4l_print_buftype(const void *arg, bool write_only)
 398 {
 399         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 400 }
 401
 402 static void v4l_print_modulator(const void *arg, bool write_only)
 403 {
 404         const struct v4l2_modulator *p = arg;
 405
 406         if (write_only)
 407                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 408         else
 409                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 410                         p->index, (int)sizeof(p->name), p->name, p->capability,
 411                         p->rangelow, p->rangehigh, p->txsubchans);
 412 }
 413
 414 static void v4l_print_tuner(const void *arg, bool write_only)
 415 {
 416         const struct v4l2_tuner *p = arg;
 417
 418         if (write_only)
 419                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 420         else
 421                 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",
 422                         p->index, (int)sizeof(p->name), p->name, p->type,
 423                         p->capability, p->rangelow,
 424                         p->rangehigh, p->signal, p->afc,
 425                         p->rxsubchans, p->audmode);
 426 }
 427
 428 static void v4l_print_frequency(const void *arg, bool write_only)
 429 {
 430         const struct v4l2_frequency *p = arg;
 431
 432         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 433                                 p->tuner, p->type, p->frequency);
 434 }
 435
 436 static void v4l_print_standard(const void *arg, bool write_only)
 437 {
 438         const struct v4l2_standard *p = arg;
 439
 440         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 441                 p->index,
 442                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 443                 p->frameperiod.numerator,
 444                 p->frameperiod.denominator,
 445                 p->framelines);
 446 }
 447
 448 static void v4l_print_std(const void *arg, bool write_only)
 449 {
 450         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 451 }
 452
 453 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 454 {
 455         const struct v4l2_hw_freq_seek *p = arg;
 456
 457         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 458                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 459                 p->rangelow, p->rangehigh);
 460 }
 461
 462 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 463 {
 464         const struct v4l2_requestbuffers *p = arg;
 465
 466         pr_cont("count=%d, type=%s, memory=%s\n",
 467                 p->count,
 468                 prt_names(p->type, v4l2_type_names),
 469                 prt_names(p->memory, v4l2_memory_names));
 470 }
 471
 472 static void v4l_print_buffer(const void *arg, bool write_only)
 473 {
 474         const struct v4l2_buffer *p = arg;
 475         const struct v4l2_timecode *tc = &p->timecode;
 476         const struct v4l2_plane *plane;
 477         int i;
 478
 479         pr_cont("%02d:%02d:%02d.%09ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 480                         (int)p->timestamp.tv_sec / 3600,
 481                         ((int)p->timestamp.tv_sec / 60) % 60,
 482                         ((int)p->timestamp.tv_sec % 60),
 483                         (long)p->timestamp.tv_usec,
 484                         p->index,
 485                         prt_names(p->type, v4l2_type_names), p->request_fd,
 486                         p->flags, prt_names(p->field, v4l2_field_names),
 487                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 488
 489         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 490                 pr_cont("\n");
 491                 for (i = 0; i < p->length; ++i) {
 492                         plane = &p->m.planes[i];
 493                         printk(KERN_DEBUG
 494                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 495                                 i, plane->bytesused, plane->data_offset,
 496                                 plane->m.userptr, plane->length);
 497                 }
 498         } else {
 499                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 500                         p->bytesused, p->m.userptr, p->length);
 501         }
 502
 503         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 504                         tc->hours, tc->minutes, tc->seconds,
 505                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 506 }
 507
 508 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 509 {
 510         const struct v4l2_exportbuffer *p = arg;
 511
 512         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 513                 p->fd, prt_names(p->type, v4l2_type_names),
 514                 p->index, p->plane, p->flags);
 515 }
 516
 517 static void v4l_print_create_buffers(const void *arg, bool write_only)
 518 {
 519         const struct v4l2_create_buffers *p = arg;
 520
 521         pr_cont("index=%d, count=%d, memory=%s, ",
 522                         p->index, p->count,
 523                         prt_names(p->memory, v4l2_memory_names));
 524         v4l_print_format(&p->format, write_only);
 525 }
 526
 527 static void v4l_print_streamparm(const void *arg, bool write_only)
 528 {
 529         const struct v4l2_streamparm *p = arg;
 530
 531         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 532
 533         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 534             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 535                 const struct v4l2_captureparm *c = &p->parm.capture;
 536
 537                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 538                         c->capability, c->capturemode,
 539                         c->timeperframe.numerator, c->timeperframe.denominator,
 540                         c->extendedmode, c->readbuffers);
 541         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 542                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 543                 const struct v4l2_outputparm *c = &p->parm.output;
 544
 545                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 546                         c->capability, c->outputmode,
 547                         c->timeperframe.numerator, c->timeperframe.denominator,
 548                         c->extendedmode, c->writebuffers);
 549         } else {
 550                 pr_cont("\n");
 551         }
 552 }
 553
 554 static void v4l_print_queryctrl(const void *arg, bool write_only)
 555 {
 556         const struct v4l2_queryctrl *p = arg;
 557
 558         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 559                         p->id, p->type, (int)sizeof(p->name), p->name,
 560                         p->minimum, p->maximum,
 561                         p->step, p->default_value, p->flags);
 562 }
 563
 564 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 565 {
 566         const struct v4l2_query_ext_ctrl *p = arg;
 567
 568         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",
 569                         p->id, p->type, (int)sizeof(p->name), p->name,
 570                         p->minimum, p->maximum,
 571                         p->step, p->default_value, p->flags,
 572                         p->elem_size, p->elems, p->nr_of_dims,
 573                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 574 }
 575
 576 static void v4l_print_querymenu(const void *arg, bool write_only)
 577 {
 578         const struct v4l2_querymenu *p = arg;
 579
 580         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 581 }
 582
 583 static void v4l_print_control(const void *arg, bool write_only)
 584 {
 585         const struct v4l2_control *p = arg;
 586         const char *name = v4l2_ctrl_get_name(p->id);
 587
 588         if (name)
 589                 pr_cont("name=%s, ", name);
 590         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 591 }
 592
 593 static void v4l_print_ext_controls(const void *arg, bool write_only)
 594 {
 595         const struct v4l2_ext_controls *p = arg;
 596         int i;
 597
 598         pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 599                         p->which, p->count, p->error_idx, p->request_fd);
 600         for (i = 0; i < p->count; i++) {
 601                 unsigned int id = p->controls[i].id;
 602                 const char *name = v4l2_ctrl_get_name(id);
 603
 604                 if (name)
 605                         pr_cont(", name=%s", name);
 606                 if (!p->controls[i].size)
 607                         pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
 608                 else
 609                         pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
 610         }
 611         pr_cont("\n");
 612 }
 613
 614 static void v4l_print_cropcap(const void *arg, bool write_only)
 615 {
 616         const struct v4l2_cropcap *p = arg;
 617
 618         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 619                 prt_names(p->type, v4l2_type_names),
 620                 p->bounds.width, p->bounds.height,
 621                 p->bounds.left, p->bounds.top,
 622                 p->defrect.width, p->defrect.height,
 623                 p->defrect.left, p->defrect.top,
 624                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 625 }
 626
 627 static void v4l_print_crop(const void *arg, bool write_only)
 628 {
 629         const struct v4l2_crop *p = arg;
 630
 631         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 632                 prt_names(p->type, v4l2_type_names),
 633                 p->c.width, p->c.height,
 634                 p->c.left, p->c.top);
 635 }
 636
 637 static void v4l_print_selection(const void *arg, bool write_only)
 638 {
 639         const struct v4l2_selection *p = arg;
 640
 641         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 642                 prt_names(p->type, v4l2_type_names),
 643                 p->target, p->flags,
 644                 p->r.width, p->r.height, p->r.left, p->r.top);
 645 }
 646
 647 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 648 {
 649         const struct v4l2_jpegcompression *p = arg;
 650
 651         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 652                 p->quality, p->APPn, p->APP_len,
 653                 p->COM_len, p->jpeg_markers);
 654 }
 655
 656 static void v4l_print_enc_idx(const void *arg, bool write_only)
 657 {
 658         const struct v4l2_enc_idx *p = arg;
 659
 660         pr_cont("entries=%d, entries_cap=%d\n",
 661                         p->entries, p->entries_cap);
 662 }
 663
 664 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 665 {
 666         const struct v4l2_encoder_cmd *p = arg;
 667
 668         pr_cont("cmd=%d, flags=0x%x\n",
 669                         p->cmd, p->flags);
 670 }
 671
 672 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 673 {
 674         const struct v4l2_decoder_cmd *p = arg;
 675
 676         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 677
 678         if (p->cmd == V4L2_DEC_CMD_START)
 679                 pr_info("speed=%d, format=%u\n",
 680                                 p->start.speed, p->start.format);
 681         else if (p->cmd == V4L2_DEC_CMD_STOP)
 682                 pr_info("pts=%llu\n", p->stop.pts);
 683 }
 684
 685 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 686 {
 687         const struct v4l2_dbg_chip_info *p = arg;
 688
 689         pr_cont("type=%u, ", p->match.type);
 690         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 691                 pr_cont("name=%.*s, ",
 692                                 (int)sizeof(p->match.name), p->match.name);
 693         else
 694                 pr_cont("addr=%u, ", p->match.addr);
 695         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 696 }
 697
 698 static void v4l_print_dbg_register(const void *arg, bool write_only)
 699 {
 700         const struct v4l2_dbg_register *p = arg;
 701
 702         pr_cont("type=%u, ", p->match.type);
 703         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 704                 pr_cont("name=%.*s, ",
 705                                 (int)sizeof(p->match.name), p->match.name);
 706         else
 707                 pr_cont("addr=%u, ", p->match.addr);
 708         pr_cont("reg=0x%llx, val=0x%llx\n",
 709                         p->reg, p->val);
 710 }
 711
 712 static void v4l_print_dv_timings(const void *arg, bool write_only)
 713 {
 714         const struct v4l2_dv_timings *p = arg;
 715
 716         switch (p->type) {
 717         case V4L2_DV_BT_656_1120:
 718                 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",
 719                                 p->bt.interlaced, p->bt.pixelclock,
 720                                 p->bt.width, p->bt.height,
 721                                 p->bt.polarities, p->bt.hfrontporch,
 722                                 p->bt.hsync, p->bt.hbackporch,
 723                                 p->bt.vfrontporch, p->bt.vsync,
 724                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 725                                 p->bt.il_vsync, p->bt.il_vbackporch,
 726                                 p->bt.standards, p->bt.flags);
 727                 break;
 728         default:
 729                 pr_cont("type=%d\n", p->type);
 730                 break;
 731         }
 732 }
 733
 734 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 735 {
 736         const struct v4l2_enum_dv_timings *p = arg;
 737
 738         pr_cont("index=%u, ", p->index);
 739         v4l_print_dv_timings(&p->timings, write_only);
 740 }
 741
 742 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 743 {
 744         const struct v4l2_dv_timings_cap *p = arg;
 745
 746         switch (p->type) {
 747         case V4L2_DV_BT_656_1120:
 748                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 749                         p->bt.min_width, p->bt.max_width,
 750                         p->bt.min_height, p->bt.max_height,
 751                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 752                         p->bt.standards, p->bt.capabilities);
 753                 break;
 754         default:
 755                 pr_cont("type=%u\n", p->type);
 756                 break;
 757         }
 758 }
 759
 760 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 761 {
 762         const struct v4l2_frmsizeenum *p = arg;
 763
 764         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 765                         p->index,
 766                         (p->pixel_format & 0xff),
 767                         (p->pixel_format >>  8) & 0xff,
 768                         (p->pixel_format >> 16) & 0xff,
 769                         (p->pixel_format >> 24) & 0xff,
 770                         p->type);
 771         switch (p->type) {
 772         case V4L2_FRMSIZE_TYPE_DISCRETE:
 773                 pr_cont(", wxh=%ux%u\n",
 774                         p->discrete.width, p->discrete.height);
 775                 break;
 776         case V4L2_FRMSIZE_TYPE_STEPWISE:
 777                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 778                                 p->stepwise.min_width,
 779                                 p->stepwise.min_height,
 780                                 p->stepwise.max_width,
 781                                 p->stepwise.max_height,
 782                                 p->stepwise.step_width,
 783                                 p->stepwise.step_height);
 784                 break;
 785         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 786         default:
 787                 pr_cont("\n");
 788                 break;
 789         }
 790 }
 791
 792 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 793 {
 794         const struct v4l2_frmivalenum *p = arg;
 795
 796         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 797                         p->index,
 798                         (p->pixel_format & 0xff),
 799                         (p->pixel_format >>  8) & 0xff,
 800                         (p->pixel_format >> 16) & 0xff,
 801                         (p->pixel_format >> 24) & 0xff,
 802                         p->width, p->height, p->type);
 803         switch (p->type) {
 804         case V4L2_FRMIVAL_TYPE_DISCRETE:
 805                 pr_cont(", fps=%d/%d\n",
 806                                 p->discrete.numerator,
 807                                 p->discrete.denominator);
 808                 break;
 809         case V4L2_FRMIVAL_TYPE_STEPWISE:
 810                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 811                                 p->stepwise.min.numerator,
 812                                 p->stepwise.min.denominator,
 813                                 p->stepwise.max.numerator,
 814                                 p->stepwise.max.denominator,
 815                                 p->stepwise.step.numerator,
 816                                 p->stepwise.step.denominator);
 817                 break;
 818         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 819         default:
 820                 pr_cont("\n");
 821                 break;
 822         }
 823 }
 824
 825 static void v4l_print_event(const void *arg, bool write_only)
 826 {
 827         const struct v4l2_event *p = arg;
 828         const struct v4l2_event_ctrl *c;
 829
 830         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 831                         p->type, p->pending, p->sequence, p->id,
 832                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 833         switch (p->type) {
 834         case V4L2_EVENT_VSYNC:
 835                 printk(KERN_DEBUG "field=%s\n",
 836                         prt_names(p->u.vsync.field, v4l2_field_names));
 837                 break;
 838         case V4L2_EVENT_CTRL:
 839                 c = &p->u.ctrl;
 840                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 841                         c->changes, c->type);
 842                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 843                         pr_cont("value64=%lld, ", c->value64);
 844                 else
 845                         pr_cont("value=%d, ", c->value);
 846                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 847                         c->flags, c->minimum, c->maximum,
 848                         c->step, c->default_value);
 849                 break;
 850         case V4L2_EVENT_FRAME_SYNC:
 851                 pr_cont("frame_sequence=%u\n",
 852                         p->u.frame_sync.frame_sequence);
 853                 break;
 854         }
 855 }
 856
 857 static void v4l_print_event_subscription(const void *arg, bool write_only)
 858 {
 859         const struct v4l2_event_subscription *p = arg;
 860
 861         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 862                         p->type, p->id, p->flags);
 863 }
 864
 865 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 866 {
 867         const struct v4l2_sliced_vbi_cap *p = arg;
 868         int i;
 869
 870         pr_cont("type=%s, service_set=0x%08x\n",
 871                         prt_names(p->type, v4l2_type_names), p->service_set);
 872         for (i = 0; i < 24; i++)
 873                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 874                                 p->service_lines[0][i],
 875                                 p->service_lines[1][i]);
 876 }
 877
 878 static void v4l_print_freq_band(const void *arg, bool write_only)
 879 {
 880         const struct v4l2_frequency_band *p = arg;
 881
 882         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 883                         p->tuner, p->type, p->index,
 884                         p->capability, p->rangelow,
 885                         p->rangehigh, p->modulation);
 886 }
 887
 888 static void v4l_print_edid(const void *arg, bool write_only)
 889 {
 890         const struct v4l2_edid *p = arg;
 891
 892         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 893                 p->pad, p->start_block, p->blocks);
 894 }
 895
 896 static void v4l_print_u32(const void *arg, bool write_only)
 897 {
 898         pr_cont("value=%u\n", *(const u32 *)arg);
 899 }
 900
 901 static void v4l_print_newline(const void *arg, bool write_only)
 902 {
 903         pr_cont("\n");
 904 }
 905
 906 static void v4l_print_default(const void *arg, bool write_only)
 907 {
 908         pr_cont("driver-specific ioctl\n");
 909 }
 910
 911 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 912 {
 913         __u32 i;
 914
 915         /* zero the reserved fields */
 916         c->reserved[0] = 0;
 917         for (i = 0; i < c->count; i++)
 918                 c->controls[i].reserved2[0] = 0;
 919
 920         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 921            when using extended controls.
 922            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 923            is it allowed for backwards compatibility.
 924          */
 925         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 926                 return 0;
 927         if (!c->which)
 928                 return 1;
 929         /* Check that all controls are from the same control class. */
 930         for (i = 0; i < c->count; i++) {
 931                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 932                         c->error_idx = i;
 933                         return 0;
 934                 }
 935         }
 936         return 1;
 937 }
 938
 939 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 940 {
 941         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 942                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 943                              V4L2_CAP_VIDEO_OUTPUT |
 944                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 945                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 946         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 947                               V4L2_CAP_META_OUTPUT;
 948         struct video_device *vfd = video_devdata(file);
 949         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 950         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 951                       (vfd->device_caps & vid_caps);
 952         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 953         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 954         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 955         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 956                        (vfd->device_caps & meta_caps);
 957         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 958         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 959
 960         if (ops == NULL)
 961                 return -EINVAL;
 962
 963         switch (type) {
 964         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 965                 if ((is_vid || is_tch) && is_rx &&
 966                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 967                         return 0;
 968                 break;
 969         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 970                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 971                         return 0;
 972                 break;
 973         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 974                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 975                         return 0;
 976                 break;
 977         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 978                 if (is_vid && is_tx &&
 979                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 980                         return 0;
 981                 break;
 982         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 983                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 984                         return 0;
 985                 break;
 986         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 987                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 988                         return 0;
 989                 break;
 990         case V4L2_BUF_TYPE_VBI_CAPTURE:
 991                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 992                         return 0;
 993                 break;
 994         case V4L2_BUF_TYPE_VBI_OUTPUT:
 995                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 996                         return 0;
 997                 break;
 998         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 999                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
1000                         return 0;
1001                 break;
1002         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1003                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
1004                         return 0;
1005                 break;
1006         case V4L2_BUF_TYPE_SDR_CAPTURE:
1007                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
1008                         return 0;
1009                 break;
1010         case V4L2_BUF_TYPE_SDR_OUTPUT:
1011                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
1012                         return 0;
1013                 break;
1014         case V4L2_BUF_TYPE_META_CAPTURE:
1015                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
1016                         return 0;
1017                 break;
1018         case V4L2_BUF_TYPE_META_OUTPUT:
1019                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
1020                         return 0;
1021                 break;
1022         default:
1023                 break;
1024         }
1025         return -EINVAL;
1026 }
1027
1028 static void v4l_sanitize_format(struct v4l2_format *fmt)
1029 {
1030         unsigned int offset;
1031
1032         /* Make sure num_planes is not bogus */
1033         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1034             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1035                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1036                                                VIDEO_MAX_PLANES);
1037
1038         /*
1039          * The v4l2_pix_format structure has been extended with fields that were
1040          * not previously required to be set to zero by applications. The priv
1041          * field, when set to a magic value, indicates the the extended fields
1042          * are valid. Otherwise they will contain undefined values. To simplify
1043          * the API towards drivers zero the extended fields and set the priv
1044          * field to the magic value when the extended pixel format structure
1045          * isn't used by applications.
1046          */
1047
1048         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1049             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1050                 return;
1051
1052         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1053                 return;
1054
1055         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1056
1057         offset = offsetof(struct v4l2_pix_format, priv)
1058                + sizeof(fmt->fmt.pix.priv);
1059         memset(((void *)&fmt->fmt.pix) + offset, 0,
1060                sizeof(fmt->fmt.pix) - offset);
1061 }
1062
1063 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1064                                 struct file *file, void *fh, void *arg)
1065 {
1066         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1067         struct video_device *vfd = video_devdata(file);
1068         int ret;
1069
1070         cap->version = LINUX_VERSION_CODE;
1071         cap->device_caps = vfd->device_caps;
1072         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1073
1074         ret = ops->vidioc_querycap(file, fh, cap);
1075
1076         /*
1077          * Drivers must not change device_caps, so check for this and
1078          * warn if this happened.
1079          */
1080         WARN_ON(cap->device_caps != vfd->device_caps);
1081         /*
1082          * Check that capabilities is a superset of
1083          * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1084          */
1085         WARN_ON((cap->capabilities &
1086                  (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1087                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1088         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1089         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1090
1091         return ret;
1092 }
1093
1094 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1095                        struct file *file, void *fh, void *arg)
1096 {
1097         struct video_device *vfd = video_devdata(file);
1098
1099         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1100                 *(int *)arg = 0;
1101                 return 0;
1102         }
1103
1104         return ops->vidioc_g_input(file, fh, arg);
1105 }
1106
1107 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1108                         struct file *file, void *fh, void *arg)
1109 {
1110         struct video_device *vfd = video_devdata(file);
1111
1112         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1113                 *(int *)arg = 0;
1114                 return 0;
1115         }
1116
1117         return ops->vidioc_g_output(file, fh, arg);
1118 }
1119
1120 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1121                                 struct file *file, void *fh, void *arg)
1122 {
1123         struct video_device *vfd = video_devdata(file);
1124         int ret;
1125
1126         ret = v4l_enable_media_source(vfd);
1127         if (ret)
1128                 return ret;
1129
1130         if (vfd->device_caps & V4L2_CAP_IO_MC)
1131                 return  *(int *)arg ? -EINVAL : 0;
1132
1133         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1134 }
1135
1136 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1137                                 struct file *file, void *fh, void *arg)
1138 {
1139         struct video_device *vfd = video_devdata(file);
1140
1141         if (vfd->device_caps & V4L2_CAP_IO_MC)
1142                 return  *(int *)arg ? -EINVAL : 0;
1143
1144         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1145 }
1146
1147 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1148                                 struct file *file, void *fh, void *arg)
1149 {
1150         struct video_device *vfd;
1151         u32 *p = arg;
1152
1153         vfd = video_devdata(file);
1154         *p = v4l2_prio_max(vfd->prio);
1155         return 0;
1156 }
1157
1158 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1159                                 struct file *file, void *fh, void *arg)
1160 {
1161         struct video_device *vfd;
1162         struct v4l2_fh *vfh;
1163         u32 *p = arg;
1164
1165         vfd = video_devdata(file);
1166         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1167                 return -ENOTTY;
1168         vfh = file->private_data;
1169         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1170 }
1171
1172 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1173                                 struct file *file, void *fh, void *arg)
1174 {
1175         struct video_device *vfd = video_devdata(file);
1176         struct v4l2_input *p = arg;
1177
1178         /*
1179          * We set the flags for CAP_DV_TIMINGS &
1180          * CAP_STD here based on ioctl handler provided by the
1181          * driver. If the driver doesn't support these
1182          * for a specific input, it must override these flags.
1183          */
1184         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1185                 p->capabilities |= V4L2_IN_CAP_STD;
1186
1187         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1188                 if (p->index)
1189                         return -EINVAL;
1190                 strscpy(p->name, vfd->name, sizeof(p->name));
1191                 p->type = V4L2_INPUT_TYPE_CAMERA;
1192                 return 0;
1193         }
1194
1195         return ops->vidioc_enum_input(file, fh, p);
1196 }
1197
1198 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1199                                 struct file *file, void *fh, void *arg)
1200 {
1201         struct video_device *vfd = video_devdata(file);
1202         struct v4l2_output *p = arg;
1203
1204         /*
1205          * We set the flags for CAP_DV_TIMINGS &
1206          * CAP_STD here based on ioctl handler provided by the
1207          * driver. If the driver doesn't support these
1208          * for a specific output, it must override these flags.
1209          */
1210         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1211                 p->capabilities |= V4L2_OUT_CAP_STD;
1212
1213         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1214                 if (p->index)
1215                         return -EINVAL;
1216                 strscpy(p->name, vfd->name, sizeof(p->name));
1217                 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1218                 return 0;
1219         }
1220
1221         return ops->vidioc_enum_output(file, fh, p);
1222 }
1223
1224 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1225 {
1226         const unsigned sz = sizeof(fmt->description);
1227         const char *descr = NULL;
1228         u32 flags = 0;
1229
1230         /*
1231          * We depart from the normal coding style here since the descriptions
1232          * should be aligned so it is easy to see which descriptions will be
1233          * longer than 31 characters (the max length for a description).
1234          * And frankly, this is easier to read anyway.
1235          *
1236          * Note that gcc will use O(log N) comparisons to find the right case.
1237          */
1238         switch (fmt->pixelformat) {
1239         /* Max description length mask: descr = "0123456789012345678901234567890" */
1240         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1241         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1242         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1243         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1244         case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1245         case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1246         case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1247         case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1248         case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1249         case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1250         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1251         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1252         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1253         case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1254         case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1255         case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1256         case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1257         case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1258         case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1259         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1260         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1261         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1262         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1263         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1264         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1265         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1266         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1267         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1268         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1269         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1270         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1271         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1272         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1273         case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1274         case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1275         case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1276         case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1277         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1278         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1279         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1280         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1281         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1282         case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1283         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1284         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1285         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1286         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1287         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1288         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1289         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1290         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1291         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1292         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1293         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1294         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1295         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1296         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1297         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1298         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1299         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1300         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1301         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1302         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1303         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1304         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1305         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1306         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1307         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1308         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1309         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1310         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1311         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1312         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1313         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1314         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1315         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1316         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1317         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1318         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1319         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1320         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1321         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1322         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1323         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1324         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1325         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1326         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1327         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1328         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1329         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1330         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1331         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1332         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1333         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1334         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1335         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1336         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1337         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1338         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1339         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1340         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1341         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1342         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1343         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1344         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1345         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1346         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1347         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1348         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1349         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1350         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1351         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1352         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1353         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1354         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1355         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1356         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1357         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1358         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1359         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1360         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1361         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1362         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1363         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1364         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1365         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1366         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1367         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1368         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1369         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1370         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1371         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1372         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1373         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1374         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1375         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1376         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1377         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1378         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1379         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1380         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1381         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1382         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1383         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1384         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1385         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1386         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1387         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1388         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1389         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1390         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1391         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1392         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1393         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1394         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1395         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1396         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1397         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1398         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1399         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1400         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1401         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1402         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1403         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1404         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1405         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1406         case V4L2_META_FMT_RK_ISP1_PARAMS:      descr = "Rockchip ISP1 3A Parameters"; break;
1407         case V4L2_META_FMT_RK_ISP1_STAT_3A:     descr = "Rockchip ISP1 3A Statistics"; break;
1408
1409         default:
1410                 /* Compressed formats */
1411                 flags = V4L2_FMT_FLAG_COMPRESSED;
1412                 switch (fmt->pixelformat) {
1413                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1414                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1415                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1416                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1417                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1418                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1419                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1420                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1421                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1422                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1423                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1424                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1425                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1426                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1427                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1428                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1429                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1430                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1431                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1432                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1433                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1434                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1435                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1436                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1437                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1438                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1439                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1440                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1441                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1442                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1443                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1444                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1445                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1446                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1447                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1448                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1449                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1450                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1451                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1452                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1453                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1454                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1455                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1456                 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1457                 default:
1458                         if (fmt->description[0])
1459                                 return;
1460                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1461                         flags = 0;
1462                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1463                                         (char)(fmt->pixelformat & 0x7f),
1464                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1465                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1466                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1467                                         (fmt->pixelformat & (1UL << 31)) ? "-BE" : "");
1468                         break;
1469                 }
1470         }
1471
1472         if (descr)
1473                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1474         fmt->flags |= flags;
1475 }
1476
1477 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1478                                 struct file *file, void *fh, void *arg)
1479 {
1480         struct video_device *vdev = video_devdata(file);
1481         struct v4l2_fmtdesc *p = arg;
1482         int ret = check_fmt(file, p->type);
1483         u32 mbus_code;
1484         u32 cap_mask;
1485
1486         if (ret)
1487                 return ret;
1488         ret = -EINVAL;
1489
1490         if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1491                 p->mbus_code = 0;
1492
1493         mbus_code = p->mbus_code;
1494         CLEAR_AFTER_FIELD(p, type);
1495         p->mbus_code = mbus_code;
1496
1497         switch (p->type) {
1498         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1499         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1500                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1501                            V4L2_CAP_VIDEO_M2M_MPLANE;
1502                 if (!!(vdev->device_caps & cap_mask) !=
1503                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1504                         break;
1505
1506                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1507                         break;
1508                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1509                 break;
1510         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1511                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1512                         break;
1513                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1514                 break;
1515         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1516         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1517                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1518                            V4L2_CAP_VIDEO_M2M_MPLANE;
1519                 if (!!(vdev->device_caps & cap_mask) !=
1520                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1521                         break;
1522
1523                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1524                         break;
1525                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1526                 break;
1527         case V4L2_BUF_TYPE_SDR_CAPTURE:
1528                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1529                         break;
1530                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1531                 break;
1532         case V4L2_BUF_TYPE_SDR_OUTPUT:
1533                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1534                         break;
1535                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1536                 break;
1537         case V4L2_BUF_TYPE_META_CAPTURE:
1538                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1539                         break;
1540                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1541                 break;
1542         case V4L2_BUF_TYPE_META_OUTPUT:
1543                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1544                         break;
1545                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1546                 break;
1547         }
1548         if (ret == 0)
1549                 v4l_fill_fmtdesc(p);
1550         return ret;
1551 }
1552
1553 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1554 {
1555         /*
1556          * The v4l2_pix_format structure contains fields that make no sense for
1557          * touch. Set them to default values in this case.
1558          */
1559
1560         p->field = V4L2_FIELD_NONE;
1561         p->colorspace = V4L2_COLORSPACE_RAW;
1562         p->flags = 0;
1563         p->ycbcr_enc = 0;
1564         p->quantization = 0;
1565         p->xfer_func = 0;
1566 }
1567
1568 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1569                                 struct file *file, void *fh, void *arg)
1570 {
1571         struct v4l2_format *p = arg;
1572         struct video_device *vfd = video_devdata(file);
1573         int ret = check_fmt(file, p->type);
1574
1575         if (ret)
1576                 return ret;
1577
1578         /*
1579          * fmt can't be cleared for these overlay types due to the 'clips'
1580          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1581          * Those are provided by the user. So handle these two overlay types
1582          * first, and then just do a simple memset for the other types.
1583          */
1584         switch (p->type) {
1585         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1586         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1587                 struct v4l2_clip *clips = p->fmt.win.clips;
1588                 u32 clipcount = p->fmt.win.clipcount;
1589                 void __user *bitmap = p->fmt.win.bitmap;
1590
1591                 memset(&p->fmt, 0, sizeof(p->fmt));
1592                 p->fmt.win.clips = clips;
1593                 p->fmt.win.clipcount = clipcount;
1594                 p->fmt.win.bitmap = bitmap;
1595                 break;
1596         }
1597         default:
1598                 memset(&p->fmt, 0, sizeof(p->fmt));
1599                 break;
1600         }
1601
1602         switch (p->type) {
1603         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1604                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1605                         break;
1606                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1607                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1608                 /* just in case the driver zeroed it again */
1609                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1610                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1611                         v4l_pix_format_touch(&p->fmt.pix);
1612                 return ret;
1613         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1614                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1615         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1616                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1617         case V4L2_BUF_TYPE_VBI_CAPTURE:
1618                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1619         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1620                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1621         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1622                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1623                         break;
1624                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1625                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1626                 /* just in case the driver zeroed it again */
1627                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1628                 return ret;
1629         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1630                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1631         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1632                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1633         case V4L2_BUF_TYPE_VBI_OUTPUT:
1634                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1635         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1636                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1637         case V4L2_BUF_TYPE_SDR_CAPTURE:
1638                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1639         case V4L2_BUF_TYPE_SDR_OUTPUT:
1640                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1641         case V4L2_BUF_TYPE_META_CAPTURE:
1642                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1643         case V4L2_BUF_TYPE_META_OUTPUT:
1644                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1645         }
1646         return -EINVAL;
1647 }
1648
1649 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1650                                 struct file *file, void *fh, void *arg)
1651 {
1652         struct v4l2_format *p = arg;
1653         struct video_device *vfd = video_devdata(file);
1654         int ret = check_fmt(file, p->type);
1655         unsigned int i;
1656
1657         if (ret)
1658                 return ret;
1659
1660         ret = v4l_enable_media_source(vfd);
1661         if (ret)
1662                 return ret;
1663         v4l_sanitize_format(p);
1664
1665         switch (p->type) {
1666         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1667                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1668                         break;
1669                 CLEAR_AFTER_FIELD(p, fmt.pix);
1670                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1671                 /* just in case the driver zeroed it again */
1672                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1673                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1674                         v4l_pix_format_touch(&p->fmt.pix);
1675                 return ret;
1676         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1677                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1678                         break;
1679                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1680                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1681                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1682                                           bytesperline);
1683                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1684         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1685                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1686                         break;
1687                 CLEAR_AFTER_FIELD(p, fmt.win);
1688                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1689         case V4L2_BUF_TYPE_VBI_CAPTURE:
1690                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1691                         break;
1692                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1693                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1694         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1695                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1696                         break;
1697                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1698                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1699         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1700                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1701                         break;
1702                 CLEAR_AFTER_FIELD(p, fmt.pix);
1703                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1704                 /* just in case the driver zeroed it again */
1705                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1706                 return ret;
1707         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1708                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1709                         break;
1710                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1711                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1712                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1713                                           bytesperline);
1714                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1715         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1716                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1717                         break;
1718                 CLEAR_AFTER_FIELD(p, fmt.win);
1719                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1720         case V4L2_BUF_TYPE_VBI_OUTPUT:
1721                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1722                         break;
1723                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1724                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1725         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1726                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1727                         break;
1728                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1729                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1730         case V4L2_BUF_TYPE_SDR_CAPTURE:
1731                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1732                         break;
1733                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1734                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1735         case V4L2_BUF_TYPE_SDR_OUTPUT:
1736                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1737                         break;
1738                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1739                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1740         case V4L2_BUF_TYPE_META_CAPTURE:
1741                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1742                         break;
1743                 CLEAR_AFTER_FIELD(p, fmt.meta);
1744                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1745         case V4L2_BUF_TYPE_META_OUTPUT:
1746                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1747                         break;
1748                 CLEAR_AFTER_FIELD(p, fmt.meta);
1749                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1750         }
1751         return -EINVAL;
1752 }
1753
1754 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1755                                 struct file *file, void *fh, void *arg)
1756 {
1757         struct v4l2_format *p = arg;
1758         struct video_device *vfd = video_devdata(file);
1759         int ret = check_fmt(file, p->type);
1760         unsigned int i;
1761
1762         if (ret)
1763                 return ret;
1764
1765         v4l_sanitize_format(p);
1766
1767         switch (p->type) {
1768         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1769                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1770                         break;
1771                 CLEAR_AFTER_FIELD(p, fmt.pix);
1772                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1773                 /* just in case the driver zeroed it again */
1774                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1775                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1776                         v4l_pix_format_touch(&p->fmt.pix);
1777                 return ret;
1778         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1779                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1780                         break;
1781                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1782                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1783                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1784                                           bytesperline);
1785                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1786         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1787                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1788                         break;
1789                 CLEAR_AFTER_FIELD(p, fmt.win);
1790                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1791         case V4L2_BUF_TYPE_VBI_CAPTURE:
1792                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1793                         break;
1794                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1795                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1796         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1797                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1798                         break;
1799                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1800                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1801         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1802                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1803                         break;
1804                 CLEAR_AFTER_FIELD(p, fmt.pix);
1805                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1806                 /* just in case the driver zeroed it again */
1807                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1808                 return ret;
1809         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1810                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1811                         break;
1812                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1813                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1814                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1815                                           bytesperline);
1816                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1817         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1818                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1819                         break;
1820                 CLEAR_AFTER_FIELD(p, fmt.win);
1821                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1822         case V4L2_BUF_TYPE_VBI_OUTPUT:
1823                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1824                         break;
1825                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1826                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1827         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1828                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1829                         break;
1830                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1831                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1832         case V4L2_BUF_TYPE_SDR_CAPTURE:
1833                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1834                         break;
1835                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1836                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1837         case V4L2_BUF_TYPE_SDR_OUTPUT:
1838                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1839                         break;
1840                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1841                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1842         case V4L2_BUF_TYPE_META_CAPTURE:
1843                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1844                         break;
1845                 CLEAR_AFTER_FIELD(p, fmt.meta);
1846                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1847         case V4L2_BUF_TYPE_META_OUTPUT:
1848                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1849                         break;
1850                 CLEAR_AFTER_FIELD(p, fmt.meta);
1851                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1852         }
1853         return -EINVAL;
1854 }
1855
1856 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1857                                 struct file *file, void *fh, void *arg)
1858 {
1859         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1860 }
1861
1862 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1863                                 struct file *file, void *fh, void *arg)
1864 {
1865         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1866 }
1867
1868 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1869                                 struct file *file, void *fh, void *arg)
1870 {
1871         struct video_device *vfd = video_devdata(file);
1872         struct v4l2_tuner *p = arg;
1873         int err;
1874
1875         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1876                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1877         err = ops->vidioc_g_tuner(file, fh, p);
1878         if (!err)
1879                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1880         return err;
1881 }
1882
1883 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1884                                 struct file *file, void *fh, void *arg)
1885 {
1886         struct video_device *vfd = video_devdata(file);
1887         struct v4l2_tuner *p = arg;
1888         int ret;
1889
1890         ret = v4l_enable_media_source(vfd);
1891         if (ret)
1892                 return ret;
1893         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1894                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1895         return ops->vidioc_s_tuner(file, fh, p);
1896 }
1897
1898 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1899                                 struct file *file, void *fh, void *arg)
1900 {
1901         struct video_device *vfd = video_devdata(file);
1902         struct v4l2_modulator *p = arg;
1903         int err;
1904
1905         if (vfd->vfl_type == VFL_TYPE_RADIO)
1906                 p->type = V4L2_TUNER_RADIO;
1907
1908         err = ops->vidioc_g_modulator(file, fh, p);
1909         if (!err)
1910                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1911         return err;
1912 }
1913
1914 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1915                                 struct file *file, void *fh, void *arg)
1916 {
1917         struct video_device *vfd = video_devdata(file);
1918         struct v4l2_modulator *p = arg;
1919
1920         if (vfd->vfl_type == VFL_TYPE_RADIO)
1921                 p->type = V4L2_TUNER_RADIO;
1922
1923         return ops->vidioc_s_modulator(file, fh, p);
1924 }
1925
1926 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1927                                 struct file *file, void *fh, void *arg)
1928 {
1929         struct video_device *vfd = video_devdata(file);
1930         struct v4l2_frequency *p = arg;
1931
1932         if (vfd->vfl_type == VFL_TYPE_SDR)
1933                 p->type = V4L2_TUNER_SDR;
1934         else
1935                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1936                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1937         return ops->vidioc_g_frequency(file, fh, p);
1938 }
1939
1940 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1941                                 struct file *file, void *fh, void *arg)
1942 {
1943         struct video_device *vfd = video_devdata(file);
1944         const struct v4l2_frequency *p = arg;
1945         enum v4l2_tuner_type type;
1946         int ret;
1947
1948         ret = v4l_enable_media_source(vfd);
1949         if (ret)
1950                 return ret;
1951         if (vfd->vfl_type == VFL_TYPE_SDR) {
1952                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1953                         return -EINVAL;
1954         } else {
1955                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1956                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1957                 if (type != p->type)
1958                         return -EINVAL;
1959         }
1960         return ops->vidioc_s_frequency(file, fh, p);
1961 }
1962
1963 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1964                                 struct file *file, void *fh, void *arg)
1965 {
1966         struct video_device *vfd = video_devdata(file);
1967         struct v4l2_standard *p = arg;
1968
1969         return v4l_video_std_enumstd(p, vfd->tvnorms);
1970 }
1971
1972 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1973                                 struct file *file, void *fh, void *arg)
1974 {
1975         struct video_device *vfd = video_devdata(file);
1976         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1977         int ret;
1978
1979         ret = v4l_enable_media_source(vfd);
1980         if (ret)
1981                 return ret;
1982         norm = id & vfd->tvnorms;
1983         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1984                 return -EINVAL;
1985
1986         /* Calls the specific handler */
1987         return ops->vidioc_s_std(file, fh, norm);
1988 }
1989
1990 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1991                                 struct file *file, void *fh, void *arg)
1992 {
1993         struct video_device *vfd = video_devdata(file);
1994         v4l2_std_id *p = arg;
1995         int ret;
1996
1997         ret = v4l_enable_media_source(vfd);
1998         if (ret)
1999                 return ret;
2000         /*
2001          * If no signal is detected, then the driver should return
2002          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
2003          * any standards that do not apply removed.
2004          *
2005          * This means that tuners, audio and video decoders can join
2006          * their efforts to improve the standards detection.
2007          */
2008         *p = vfd->tvnorms;
2009         return ops->vidioc_querystd(file, fh, arg);
2010 }
2011
2012 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2013                                 struct file *file, void *fh, void *arg)
2014 {
2015         struct video_device *vfd = video_devdata(file);
2016         struct v4l2_hw_freq_seek *p = arg;
2017         enum v4l2_tuner_type type;
2018         int ret;
2019
2020         ret = v4l_enable_media_source(vfd);
2021         if (ret)
2022                 return ret;
2023         /* s_hw_freq_seek is not supported for SDR for now */
2024         if (vfd->vfl_type == VFL_TYPE_SDR)
2025                 return -EINVAL;
2026
2027         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2028                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2029         if (p->type != type)
2030                 return -EINVAL;
2031         return ops->vidioc_s_hw_freq_seek(file, fh, p);
2032 }
2033
2034 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2035                                 struct file *file, void *fh, void *arg)
2036 {
2037         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2038 }
2039
2040 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2041                                 struct file *file, void *fh, void *arg)
2042 {
2043         struct v4l2_requestbuffers *p = arg;
2044         int ret = check_fmt(file, p->type);
2045
2046         if (ret)
2047                 return ret;
2048
2049         CLEAR_AFTER_FIELD(p, capabilities);
2050
2051         return ops->vidioc_reqbufs(file, fh, p);
2052 }
2053
2054 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2055                                 struct file *file, void *fh, void *arg)
2056 {
2057         struct v4l2_buffer *p = arg;
2058         int ret = check_fmt(file, p->type);
2059
2060         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2061 }
2062
2063 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2064                                 struct file *file, void *fh, void *arg)
2065 {
2066         struct v4l2_buffer *p = arg;
2067         int ret = check_fmt(file, p->type);
2068
2069         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2070 }
2071
2072 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2073                                 struct file *file, void *fh, void *arg)
2074 {
2075         struct v4l2_buffer *p = arg;
2076         int ret = check_fmt(file, p->type);
2077
2078         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2079 }
2080
2081 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2082                                 struct file *file, void *fh, void *arg)
2083 {
2084         struct v4l2_create_buffers *create = arg;
2085         int ret = check_fmt(file, create->format.type);
2086
2087         if (ret)
2088                 return ret;
2089
2090         CLEAR_AFTER_FIELD(create, capabilities);
2091
2092         v4l_sanitize_format(&create->format);
2093
2094         ret = ops->vidioc_create_bufs(file, fh, create);
2095
2096         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2097             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2098                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2099
2100         return ret;
2101 }
2102
2103 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2104                                 struct file *file, void *fh, void *arg)
2105 {
2106         struct v4l2_buffer *b = arg;
2107         int ret = check_fmt(file, b->type);
2108
2109         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2110 }
2111
2112 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2113                                 struct file *file, void *fh, void *arg)
2114 {
2115         struct v4l2_streamparm *p = arg;
2116         v4l2_std_id std;
2117         int ret = check_fmt(file, p->type);
2118
2119         if (ret)
2120                 return ret;
2121         if (ops->vidioc_g_parm)
2122                 return ops->vidioc_g_parm(file, fh, p);
2123         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2124             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2125                 return -EINVAL;
2126         p->parm.capture.readbuffers = 2;
2127         ret = ops->vidioc_g_std(file, fh, &std);
2128         if (ret == 0)
2129                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2130         return ret;
2131 }
2132
2133 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2134                                 struct file *file, void *fh, void *arg)
2135 {
2136         struct v4l2_streamparm *p = arg;
2137         int ret = check_fmt(file, p->type);
2138
2139         if (ret)
2140                 return ret;
2141
2142         /* Note: extendedmode is never used in drivers */
2143         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2144                 memset(p->parm.output.reserved, 0,
2145                        sizeof(p->parm.output.reserved));
2146                 p->parm.output.extendedmode = 0;
2147                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2148         } else {
2149                 memset(p->parm.capture.reserved, 0,
2150                        sizeof(p->parm.capture.reserved));
2151                 p->parm.capture.extendedmode = 0;
2152                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2153         }
2154         return ops->vidioc_s_parm(file, fh, p);
2155 }
2156
2157 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2158                                 struct file *file, void *fh, void *arg)
2159 {
2160         struct video_device *vfd = video_devdata(file);
2161         struct v4l2_queryctrl *p = arg;
2162         struct v4l2_fh *vfh =
2163                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2164
2165         if (vfh && vfh->ctrl_handler)
2166                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2167         if (vfd->ctrl_handler)
2168                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2169         if (ops->vidioc_queryctrl)
2170                 return ops->vidioc_queryctrl(file, fh, p);
2171         return -ENOTTY;
2172 }
2173
2174 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2175                                 struct file *file, void *fh, void *arg)
2176 {
2177         struct video_device *vfd = video_devdata(file);
2178         struct v4l2_query_ext_ctrl *p = arg;
2179         struct v4l2_fh *vfh =
2180                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2181
2182         if (vfh && vfh->ctrl_handler)
2183                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2184         if (vfd->ctrl_handler)
2185                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2186         if (ops->vidioc_query_ext_ctrl)
2187                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2188         return -ENOTTY;
2189 }
2190
2191 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2192                                 struct file *file, void *fh, void *arg)
2193 {
2194         struct video_device *vfd = video_devdata(file);
2195         struct v4l2_querymenu *p = arg;
2196         struct v4l2_fh *vfh =
2197                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2198
2199         if (vfh && vfh->ctrl_handler)
2200                 return v4l2_querymenu(vfh->ctrl_handler, p);
2201         if (vfd->ctrl_handler)
2202                 return v4l2_querymenu(vfd->ctrl_handler, p);
2203         if (ops->vidioc_querymenu)
2204                 return ops->vidioc_querymenu(file, fh, p);
2205         return -ENOTTY;
2206 }
2207
2208 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2209                                 struct file *file, void *fh, void *arg)
2210 {
2211         struct video_device *vfd = video_devdata(file);
2212         struct v4l2_control *p = arg;
2213         struct v4l2_fh *vfh =
2214                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2215         struct v4l2_ext_controls ctrls;
2216         struct v4l2_ext_control ctrl;
2217
2218         if (vfh && vfh->ctrl_handler)
2219                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2220         if (vfd->ctrl_handler)
2221                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2222         if (ops->vidioc_g_ctrl)
2223                 return ops->vidioc_g_ctrl(file, fh, p);
2224         if (ops->vidioc_g_ext_ctrls == NULL)
2225                 return -ENOTTY;
2226
2227         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2228         ctrls.count = 1;
2229         ctrls.controls = &ctrl;
2230         ctrl.id = p->id;
2231         ctrl.value = p->value;
2232         if (check_ext_ctrls(&ctrls, 1)) {
2233                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2234
2235                 if (ret == 0)
2236                         p->value = ctrl.value;
2237                 return ret;
2238         }
2239         return -EINVAL;
2240 }
2241
2242 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2243                                 struct file *file, void *fh, void *arg)
2244 {
2245         struct video_device *vfd = video_devdata(file);
2246         struct v4l2_control *p = arg;
2247         struct v4l2_fh *vfh =
2248                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2249         struct v4l2_ext_controls ctrls;
2250         struct v4l2_ext_control ctrl;
2251
2252         if (vfh && vfh->ctrl_handler)
2253                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2254         if (vfd->ctrl_handler)
2255                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2256         if (ops->vidioc_s_ctrl)
2257                 return ops->vidioc_s_ctrl(file, fh, p);
2258         if (ops->vidioc_s_ext_ctrls == NULL)
2259                 return -ENOTTY;
2260
2261         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2262         ctrls.count = 1;
2263         ctrls.controls = &ctrl;
2264         ctrl.id = p->id;
2265         ctrl.value = p->value;
2266         if (check_ext_ctrls(&ctrls, 1))
2267                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2268         return -EINVAL;
2269 }
2270
2271 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2272                                 struct file *file, void *fh, void *arg)
2273 {
2274         struct video_device *vfd = video_devdata(file);
2275         struct v4l2_ext_controls *p = arg;
2276         struct v4l2_fh *vfh =
2277                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2278
2279         p->error_idx = p->count;
2280         if (vfh && vfh->ctrl_handler)
2281                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2282                                         vfd, vfd->v4l2_dev->mdev, p);
2283         if (vfd->ctrl_handler)
2284                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2285                                         vfd, vfd->v4l2_dev->mdev, p);
2286         if (ops->vidioc_g_ext_ctrls == NULL)
2287                 return -ENOTTY;
2288         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2289                                         -EINVAL;
2290 }
2291
2292 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2293                                 struct file *file, void *fh, void *arg)
2294 {
2295         struct video_device *vfd = video_devdata(file);
2296         struct v4l2_ext_controls *p = arg;
2297         struct v4l2_fh *vfh =
2298                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2299
2300         p->error_idx = p->count;
2301         if (vfh && vfh->ctrl_handler)
2302                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2303                                         vfd, vfd->v4l2_dev->mdev, p);
2304         if (vfd->ctrl_handler)
2305                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2306                                         vfd, vfd->v4l2_dev->mdev, p);
2307         if (ops->vidioc_s_ext_ctrls == NULL)
2308                 return -ENOTTY;
2309         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2310                                         -EINVAL;
2311 }
2312
2313 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2314                                 struct file *file, void *fh, void *arg)
2315 {
2316         struct video_device *vfd = video_devdata(file);
2317         struct v4l2_ext_controls *p = arg;
2318         struct v4l2_fh *vfh =
2319                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2320
2321         p->error_idx = p->count;
2322         if (vfh && vfh->ctrl_handler)
2323                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2324                                           vfd, vfd->v4l2_dev->mdev, p);
2325         if (vfd->ctrl_handler)
2326                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2327                                           vfd, vfd->v4l2_dev->mdev, p);
2328         if (ops->vidioc_try_ext_ctrls == NULL)
2329                 return -ENOTTY;
2330         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2331                                         -EINVAL;
2332 }
2333
2334 /*
2335  * The selection API specified originally that the _MPLANE buffer types
2336  * shouldn't be used. The reasons for this are lost in the mists of time
2337  * (or just really crappy memories). Regardless, this is really annoying
2338  * for userspace. So to keep things simple we map _MPLANE buffer types
2339  * to their 'regular' counterparts before calling the driver. And we
2340  * restore it afterwards. This way applications can use either buffer
2341  * type and drivers don't need to check for both.
2342  */
2343 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2344                            struct file *file, void *fh, void *arg)
2345 {
2346         struct v4l2_selection *p = arg;
2347         u32 old_type = p->type;
2348         int ret;
2349
2350         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2351                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2352         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2353                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2354         ret = ops->vidioc_g_selection(file, fh, p);
2355         p->type = old_type;
2356         return ret;
2357 }
2358
2359 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2360                            struct file *file, void *fh, void *arg)
2361 {
2362         struct v4l2_selection *p = arg;
2363         u32 old_type = p->type;
2364         int ret;
2365
2366         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2367                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2368         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2369                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2370         ret = ops->vidioc_s_selection(file, fh, p);
2371         p->type = old_type;
2372         return ret;
2373 }
2374
2375 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2376                                 struct file *file, void *fh, void *arg)
2377 {
2378         struct video_device *vfd = video_devdata(file);
2379         struct v4l2_crop *p = arg;
2380         struct v4l2_selection s = {
2381                 .type = p->type,
2382         };
2383         int ret;
2384
2385         /* simulate capture crop using selection api */
2386
2387         /* crop means compose for output devices */
2388         if (V4L2_TYPE_IS_OUTPUT(p->type))
2389                 s.target = V4L2_SEL_TGT_COMPOSE;
2390         else
2391                 s.target = V4L2_SEL_TGT_CROP;
2392
2393         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2394                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2395                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2396
2397         ret = v4l_g_selection(ops, file, fh, &s);
2398
2399         /* copying results to old structure on success */
2400         if (!ret)
2401                 p->c = s.r;
2402         return ret;
2403 }
2404
2405 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2406                                 struct file *file, void *fh, void *arg)
2407 {
2408         struct video_device *vfd = video_devdata(file);
2409         struct v4l2_crop *p = arg;
2410         struct v4l2_selection s = {
2411                 .type = p->type,
2412                 .r = p->c,
2413         };
2414
2415         /* simulate capture crop using selection api */
2416
2417         /* crop means compose for output devices */
2418         if (V4L2_TYPE_IS_OUTPUT(p->type))
2419                 s.target = V4L2_SEL_TGT_COMPOSE;
2420         else
2421                 s.target = V4L2_SEL_TGT_CROP;
2422
2423         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2424                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2425                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2426
2427         return v4l_s_selection(ops, file, fh, &s);
2428 }
2429
2430 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2431                                 struct file *file, void *fh, void *arg)
2432 {
2433         struct video_device *vfd = video_devdata(file);
2434         struct v4l2_cropcap *p = arg;
2435         struct v4l2_selection s = { .type = p->type };
2436         int ret = 0;
2437
2438         /* setting trivial pixelaspect */
2439         p->pixelaspect.numerator = 1;
2440         p->pixelaspect.denominator = 1;
2441
2442         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2443                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2444         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2445                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2446
2447         /*
2448          * The determine_valid_ioctls() call already should ensure
2449          * that this can never happen, but just in case...
2450          */
2451         if (WARN_ON(!ops->vidioc_g_selection))
2452                 return -ENOTTY;
2453
2454         if (ops->vidioc_g_pixelaspect)
2455                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2456                                                 &p->pixelaspect);
2457
2458         /*
2459          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2460          * square pixel aspect ratio in that case.
2461          */
2462         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2463                 return ret;
2464
2465         /* Use g_selection() to fill in the bounds and defrect rectangles */
2466
2467         /* obtaining bounds */
2468         if (V4L2_TYPE_IS_OUTPUT(p->type))
2469                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2470         else
2471                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2472
2473         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2474                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2475                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2476
2477         ret = v4l_g_selection(ops, file, fh, &s);
2478         if (ret)
2479                 return ret;
2480         p->bounds = s.r;
2481
2482         /* obtaining defrect */
2483         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2484                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2485         else
2486                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2487
2488         ret = v4l_g_selection(ops, file, fh, &s);
2489         if (ret)
2490                 return ret;
2491         p->defrect = s.r;
2492
2493         return 0;
2494 }
2495
2496 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2497                                 struct file *file, void *fh, void *arg)
2498 {
2499         struct video_device *vfd = video_devdata(file);
2500         int ret;
2501
2502         if (vfd->v4l2_dev)
2503                 pr_info("%s: =================  START STATUS  =================\n",
2504                         vfd->v4l2_dev->name);
2505         ret = ops->vidioc_log_status(file, fh);
2506         if (vfd->v4l2_dev)
2507                 pr_info("%s: ==================  END STATUS  ==================\n",
2508                         vfd->v4l2_dev->name);
2509         return ret;
2510 }
2511
2512 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2513                                 struct file *file, void *fh, void *arg)
2514 {
2515 #ifdef CONFIG_VIDEO_ADV_DEBUG
2516         struct v4l2_dbg_register *p = arg;
2517         struct video_device *vfd = video_devdata(file);
2518         struct v4l2_subdev *sd;
2519         int idx = 0;
2520
2521         if (!capable(CAP_SYS_ADMIN))
2522                 return -EPERM;
2523         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2524                 if (vfd->v4l2_dev == NULL)
2525                         return -EINVAL;
2526                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2527                         if (p->match.addr == idx++)
2528                                 return v4l2_subdev_call(sd, core, g_register, p);
2529                 return -EINVAL;
2530         }
2531         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2532             (ops->vidioc_g_chip_info || p->match.addr == 0))
2533                 return ops->vidioc_g_register(file, fh, p);
2534         return -EINVAL;
2535 #else
2536         return -ENOTTY;
2537 #endif
2538 }
2539
2540 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2541                                 struct file *file, void *fh, void *arg)
2542 {
2543 #ifdef CONFIG_VIDEO_ADV_DEBUG
2544         const struct v4l2_dbg_register *p = arg;
2545         struct video_device *vfd = video_devdata(file);
2546         struct v4l2_subdev *sd;
2547         int idx = 0;
2548
2549         if (!capable(CAP_SYS_ADMIN))
2550                 return -EPERM;
2551         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2552                 if (vfd->v4l2_dev == NULL)
2553                         return -EINVAL;
2554                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2555                         if (p->match.addr == idx++)
2556                                 return v4l2_subdev_call(sd, core, s_register, p);
2557                 return -EINVAL;
2558         }
2559         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2560             (ops->vidioc_g_chip_info || p->match.addr == 0))
2561                 return ops->vidioc_s_register(file, fh, p);
2562         return -EINVAL;
2563 #else
2564         return -ENOTTY;
2565 #endif
2566 }
2567
2568 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2569                                 struct file *file, void *fh, void *arg)
2570 {
2571 #ifdef CONFIG_VIDEO_ADV_DEBUG
2572         struct video_device *vfd = video_devdata(file);
2573         struct v4l2_dbg_chip_info *p = arg;
2574         struct v4l2_subdev *sd;
2575         int idx = 0;
2576
2577         switch (p->match.type) {
2578         case V4L2_CHIP_MATCH_BRIDGE:
2579                 if (ops->vidioc_s_register)
2580                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2581                 if (ops->vidioc_g_register)
2582                         p->flags |= V4L2_CHIP_FL_READABLE;
2583                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2584                 if (ops->vidioc_g_chip_info)
2585                         return ops->vidioc_g_chip_info(file, fh, arg);
2586                 if (p->match.addr)
2587                         return -EINVAL;
2588                 return 0;
2589
2590         case V4L2_CHIP_MATCH_SUBDEV:
2591                 if (vfd->v4l2_dev == NULL)
2592                         break;
2593                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2594                         if (p->match.addr != idx++)
2595                                 continue;
2596                         if (sd->ops->core && sd->ops->core->s_register)
2597                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2598                         if (sd->ops->core && sd->ops->core->g_register)
2599                                 p->flags |= V4L2_CHIP_FL_READABLE;
2600                         strscpy(p->name, sd->name, sizeof(p->name));
2601                         return 0;
2602                 }
2603                 break;
2604         }
2605         return -EINVAL;
2606 #else
2607         return -ENOTTY;
2608 #endif
2609 }
2610
2611 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2612                                 struct file *file, void *fh, void *arg)
2613 {
2614         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2615 }
2616
2617 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2618                                 struct file *file, void *fh, void *arg)
2619 {
2620         return ops->vidioc_subscribe_event(fh, arg);
2621 }
2622
2623 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2624                                 struct file *file, void *fh, void *arg)
2625 {
2626         return ops->vidioc_unsubscribe_event(fh, arg);
2627 }
2628
2629 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2630                                 struct file *file, void *fh, void *arg)
2631 {
2632         struct v4l2_sliced_vbi_cap *p = arg;
2633         int ret = check_fmt(file, p->type);
2634
2635         if (ret)
2636                 return ret;
2637
2638         /* Clear up to type, everything after type is zeroed already */
2639         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2640
2641         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2642 }
2643
2644 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2645                                 struct file *file, void *fh, void *arg)
2646 {
2647         struct video_device *vfd = video_devdata(file);
2648         struct v4l2_frequency_band *p = arg;
2649         enum v4l2_tuner_type type;
2650         int err;
2651
2652         if (vfd->vfl_type == VFL_TYPE_SDR) {
2653                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2654                         return -EINVAL;
2655                 type = p->type;
2656         } else {
2657                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2658                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2659                 if (type != p->type)
2660                         return -EINVAL;
2661         }
2662         if (ops->vidioc_enum_freq_bands) {
2663                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2664                 if (err != -ENOTTY)
2665                         return err;
2666         }
2667         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2668                 struct v4l2_tuner t = {
2669                         .index = p->tuner,
2670                         .type = type,
2671                 };
2672
2673                 if (p->index)
2674                         return -EINVAL;
2675                 err = ops->vidioc_g_tuner(file, fh, &t);
2676                 if (err)
2677                         return err;
2678                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2679                 p->rangelow = t.rangelow;
2680                 p->rangehigh = t.rangehigh;
2681                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2682                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2683                 return 0;
2684         }
2685         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2686                 struct v4l2_modulator m = {
2687                         .index = p->tuner,
2688                 };
2689
2690                 if (type != V4L2_TUNER_RADIO)
2691                         return -EINVAL;
2692                 if (p->index)
2693                         return -EINVAL;
2694                 err = ops->vidioc_g_modulator(file, fh, &m);
2695                 if (err)
2696                         return err;
2697                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2698                 p->rangelow = m.rangelow;
2699                 p->rangehigh = m.rangehigh;
2700                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2701                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2702                 return 0;
2703         }
2704         return -ENOTTY;
2705 }
2706
2707 struct v4l2_ioctl_info {
2708         unsigned int ioctl;
2709         u32 flags;
2710         const char * const name;
2711         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2712                     void *fh, void *p);
2713         void (*debug)(const void *arg, bool write_only);
2714 };
2715
2716 /* This control needs a priority check */
2717 #define INFO_FL_PRIO            (1 << 0)
2718 /* This control can be valid if the filehandle passes a control handler. */
2719 #define INFO_FL_CTRL            (1 << 1)
2720 /* Queuing ioctl */
2721 #define INFO_FL_QUEUE           (1 << 2)
2722 /* Always copy back result, even on error */
2723 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2724 /* Zero struct from after the field to the end */
2725 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2726         ((offsetof(struct v4l2_struct, field) +                 \
2727           sizeof_field(struct v4l2_struct, field)) << 16)
2728 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2729
2730 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2731         static int v4l_stub_ ## _vidioc(                        \
2732                         const struct v4l2_ioctl_ops *ops,       \
2733                         struct file *file, void *fh, void *p)   \
2734         {                                                       \
2735                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2736         }
2737
2738 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2739         [_IOC_NR(_ioctl)] = {                                   \
2740                 .ioctl = _ioctl,                                \
2741                 .flags = _flags,                                \
2742                 .name = #_ioctl,                                \
2743                 .func = _func,                                  \
2744                 .debug = _debug,                                \
2745         }
2746
2747 DEFINE_V4L_STUB_FUNC(g_fbuf)
2748 DEFINE_V4L_STUB_FUNC(s_fbuf)
2749 DEFINE_V4L_STUB_FUNC(expbuf)
2750 DEFINE_V4L_STUB_FUNC(g_std)
2751 DEFINE_V4L_STUB_FUNC(g_audio)
2752 DEFINE_V4L_STUB_FUNC(s_audio)
2753 DEFINE_V4L_STUB_FUNC(g_edid)
2754 DEFINE_V4L_STUB_FUNC(s_edid)
2755 DEFINE_V4L_STUB_FUNC(g_audout)
2756 DEFINE_V4L_STUB_FUNC(s_audout)
2757 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2758 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2759 DEFINE_V4L_STUB_FUNC(enumaudio)
2760 DEFINE_V4L_STUB_FUNC(enumaudout)
2761 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2762 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2763 DEFINE_V4L_STUB_FUNC(g_enc_index)
2764 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2765 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2766 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2767 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2768 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2769 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2770 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2771 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2772 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2773
2774 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2775         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2776         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2777         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2778         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2779         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2780         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2781         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2782         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2783         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2784         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2785         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2786         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2787         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2788         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2789         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2790         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2791         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2792         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2793         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2794         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2795         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2796         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2797         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2798         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2799         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2800         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2801         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2802         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2803         IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2804         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2805         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2806         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2807         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2808         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2809         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2810         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2811         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2812         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2813         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2814         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2815         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2816         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2817         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2818         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2819         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2820         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2821         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2822         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2823         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2824         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2825         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2826         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2827         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2828         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2829         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)),
2830         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2831         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2832         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2833         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2834         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2835         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2836         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2837         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2838         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2839         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2840         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2841         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2842         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2843         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2844         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)),
2845         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2846         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2847         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2848         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2849         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2850         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2851         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2852         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2853         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2854         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2855         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)),
2856         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)),
2857 };
2858 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2859
2860 static bool v4l2_is_known_ioctl(unsigned int cmd)
2861 {
2862         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2863                 return false;
2864         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2865 }
2866
2867 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2868                                          struct v4l2_fh *vfh, unsigned int cmd,
2869                                          void *arg)
2870 {
2871         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2872                 return vdev->lock;
2873         if (vfh && vfh->m2m_ctx &&
2874             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2875                 if (vfh->m2m_ctx->q_lock)
2876                         return vfh->m2m_ctx->q_lock;
2877         }
2878         if (vdev->queue && vdev->queue->lock &&
2879                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2880                 return vdev->queue->lock;
2881         return vdev->lock;
2882 }
2883
2884 /* Common ioctl debug function. This function can be used by
2885    external ioctl messages as well as internal V4L ioctl */
2886 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2887 {
2888         const char *dir, *type;
2889
2890         if (prefix)
2891                 printk(KERN_DEBUG "%s: ", prefix);
2892
2893         switch (_IOC_TYPE(cmd)) {
2894         case 'd':
2895                 type = "v4l2_int";
2896                 break;
2897         case 'V':
2898                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2899                         type = "v4l2";
2900                         break;
2901                 }
2902                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2903                 return;
2904         default:
2905                 type = "unknown";
2906                 break;
2907         }
2908
2909         switch (_IOC_DIR(cmd)) {
2910         case _IOC_NONE:              dir = "--"; break;
2911         case _IOC_READ:              dir = "r-"; break;
2912         case _IOC_WRITE:             dir = "-w"; break;
2913         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2914         default:                     dir = "*ERR*"; break;
2915         }
2916         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2917                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2918 }
2919 EXPORT_SYMBOL(v4l_printk_ioctl);
2920
2921 static long __video_do_ioctl(struct file *file,
2922                 unsigned int cmd, void *arg)
2923 {
2924         struct video_device *vfd = video_devdata(file);
2925         struct mutex *req_queue_lock = NULL;
2926         struct mutex *lock; /* ioctl serialization mutex */
2927         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2928         bool write_only = false;
2929         struct v4l2_ioctl_info default_info;
2930         const struct v4l2_ioctl_info *info;
2931         void *fh = file->private_data;
2932         struct v4l2_fh *vfh = NULL;
2933         int dev_debug = vfd->dev_debug;
2934         long ret = -ENOTTY;
2935
2936         if (ops == NULL) {
2937                 pr_warn("%s: has no ioctl_ops.\n",
2938                                 video_device_node_name(vfd));
2939                 return ret;
2940         }
2941
2942         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2943                 vfh = file->private_data;
2944
2945         /*
2946          * We need to serialize streamon/off with queueing new requests.
2947          * These ioctls may trigger the cancellation of a streaming
2948          * operation, and that should not be mixed with queueing a new
2949          * request at the same time.
2950          */
2951         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2952             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2953                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2954
2955                 if (mutex_lock_interruptible(req_queue_lock))
2956                         return -ERESTARTSYS;
2957         }
2958
2959         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2960
2961         if (lock && mutex_lock_interruptible(lock)) {
2962                 if (req_queue_lock)
2963                         mutex_unlock(req_queue_lock);
2964                 return -ERESTARTSYS;
2965         }
2966
2967         if (!video_is_registered(vfd)) {
2968                 ret = -ENODEV;
2969                 goto unlock;
2970         }
2971
2972         if (v4l2_is_known_ioctl(cmd)) {
2973                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2974
2975                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2976                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2977                         goto done;
2978
2979                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2980                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2981                         if (ret)
2982                                 goto done;
2983                 }
2984         } else {
2985                 default_info.ioctl = cmd;
2986                 default_info.flags = 0;
2987                 default_info.debug = v4l_print_default;
2988                 info = &default_info;
2989         }
2990
2991         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2992         if (info != &default_info) {
2993                 ret = info->func(ops, file, fh, arg);
2994         } else if (!ops->vidioc_default) {
2995                 ret = -ENOTTY;
2996         } else {
2997                 ret = ops->vidioc_default(file, fh,
2998                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2999                         cmd, arg);
3000         }
3001
3002 done:
3003         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
3004                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3005                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3006                         goto unlock;
3007
3008                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3009                 if (ret < 0)
3010                         pr_cont(": error %ld", ret);
3011                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3012                         pr_cont("\n");
3013                 else if (_IOC_DIR(cmd) == _IOC_NONE)
3014                         info->debug(arg, write_only);
3015                 else {
3016                         pr_cont(": ");
3017                         info->debug(arg, write_only);
3018                 }
3019         }
3020
3021 unlock:
3022         if (lock)
3023                 mutex_unlock(lock);
3024         if (req_queue_lock)
3025                 mutex_unlock(req_queue_lock);
3026         return ret;
3027 }
3028
3029 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3030                             void __user **user_ptr, void ***kernel_ptr)
3031 {
3032         int ret = 0;
3033
3034         switch (cmd) {
3035         case VIDIOC_PREPARE_BUF:
3036         case VIDIOC_QUERYBUF:
3037         case VIDIOC_QBUF:
3038         case VIDIOC_DQBUF: {
3039                 struct v4l2_buffer *buf = parg;
3040
3041                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3042                         if (buf->length > VIDEO_MAX_PLANES) {
3043                                 ret = -EINVAL;
3044                                 break;
3045                         }
3046                         *user_ptr = (void __user *)buf->m.planes;
3047                         *kernel_ptr = (void **)&buf->m.planes;
3048                         *array_size = sizeof(struct v4l2_plane) * buf->length;
3049                         ret = 1;
3050                 }
3051                 break;
3052         }
3053
3054         case VIDIOC_G_EDID:
3055         case VIDIOC_S_EDID: {
3056                 struct v4l2_edid *edid = parg;
3057
3058                 if (edid->blocks) {
3059                         if (edid->blocks > 256) {
3060                                 ret = -EINVAL;
3061                                 break;
3062                         }
3063                         *user_ptr = (void __user *)edid->edid;
3064                         *kernel_ptr = (void **)&edid->edid;
3065                         *array_size = edid->blocks * 128;
3066                         ret = 1;
3067                 }
3068                 break;
3069         }
3070
3071         case VIDIOC_S_EXT_CTRLS:
3072         case VIDIOC_G_EXT_CTRLS:
3073         case VIDIOC_TRY_EXT_CTRLS: {
3074                 struct v4l2_ext_controls *ctrls = parg;
3075
3076                 if (ctrls->count != 0) {
3077                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3078                                 ret = -EINVAL;
3079                                 break;
3080                         }
3081                         *user_ptr = (void __user *)ctrls->controls;
3082                         *kernel_ptr = (void **)&ctrls->controls;
3083                         *array_size = sizeof(struct v4l2_ext_control)
3084                                     * ctrls->count;
3085                         ret = 1;
3086                 }
3087                 break;
3088         }
3089         case VIDIOC_G_FMT:
3090         case VIDIOC_S_FMT:
3091         case VIDIOC_TRY_FMT: {
3092                 struct v4l2_format *fmt = parg;
3093
3094                 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
3095                     fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
3096                         break;
3097                 if (fmt->fmt.win.clipcount > 2048)
3098                         return -EINVAL;
3099                 if (!fmt->fmt.win.clipcount)
3100                         break;
3101
3102                 *user_ptr = (void __user *)fmt->fmt.win.clips;
3103                 *kernel_ptr = (void **)&fmt->fmt.win.clips;
3104                 *array_size = sizeof(struct v4l2_clip)
3105                                 * fmt->fmt.win.clipcount;
3106
3107                 ret = 1;
3108                 break;
3109         }
3110         }
3111
3112         return ret;
3113 }
3114
3115 static unsigned int video_translate_cmd(unsigned int cmd)
3116 {
3117         switch (cmd) {
3118 #ifdef CONFIG_COMPAT_32BIT_TIME
3119         case VIDIOC_DQEVENT_TIME32:
3120                 return VIDIOC_DQEVENT;
3121         case VIDIOC_QUERYBUF_TIME32:
3122                 return VIDIOC_QUERYBUF;
3123         case VIDIOC_QBUF_TIME32:
3124                 return VIDIOC_QBUF;
3125         case VIDIOC_DQBUF_TIME32:
3126                 return VIDIOC_DQBUF;
3127         case VIDIOC_PREPARE_BUF_TIME32:
3128                 return VIDIOC_PREPARE_BUF;
3129 #endif
3130         }
3131         if (in_compat_syscall())
3132                 return v4l2_compat_translate_cmd(cmd);
3133
3134         return cmd;
3135 }
3136
3137 static int video_get_user(void __user *arg, void *parg,
3138                           unsigned int real_cmd, unsigned int cmd,
3139                           bool *always_copy)
3140 {
3141         unsigned int n = _IOC_SIZE(real_cmd);
3142         int err = 0;
3143
3144         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3145                 /* read-only ioctl */
3146                 memset(parg, 0, n);
3147                 return 0;
3148         }
3149
3150         /*
3151          * In some cases, only a few fields are used as input,
3152          * i.e. when the app sets "index" and then the driver
3153          * fills in the rest of the structure for the thing
3154          * with that index.  We only need to copy up the first
3155          * non-input field.
3156          */
3157         if (v4l2_is_known_ioctl(real_cmd)) {
3158                 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3159
3160                 if (flags & INFO_FL_CLEAR_MASK)
3161                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3162                 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3163         }
3164
3165         if (cmd == real_cmd) {
3166                 if (copy_from_user(parg, (void __user *)arg, n))
3167                         err = -EFAULT;
3168         } else if (in_compat_syscall()) {
3169                 err = v4l2_compat_get_user(arg, parg, cmd);
3170         } else {
3171                 switch (cmd) {
3172 #ifdef CONFIG_COMPAT_32BIT_TIME
3173                 case VIDIOC_QUERYBUF_TIME32:
3174                 case VIDIOC_QBUF_TIME32:
3175                 case VIDIOC_DQBUF_TIME32:
3176                 case VIDIOC_PREPARE_BUF_TIME32: {
3177                         struct v4l2_buffer_time32 vb32;
3178                         struct v4l2_buffer *vb = parg;
3179
3180                         if (copy_from_user(&vb32, arg, sizeof(vb32)))
3181                                 return -EFAULT;
3182
3183                         *vb = (struct v4l2_buffer) {
3184                                 .index          = vb32.index,
3185                                         .type           = vb32.type,
3186                                         .bytesused      = vb32.bytesused,
3187                                         .flags          = vb32.flags,
3188                                         .field          = vb32.field,
3189                                         .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3190                                         .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3191                                         .timecode       = vb32.timecode,
3192                                         .sequence       = vb32.sequence,
3193                                         .memory         = vb32.memory,
3194                                         .m.userptr      = vb32.m.userptr,
3195                                         .length         = vb32.length,
3196                                         .request_fd     = vb32.request_fd,
3197                         };
3198                         break;
3199                 }
3200 #endif
3201                 }
3202         }
3203
3204         /* zero out anything we don't copy from userspace */
3205         if (!err && n < _IOC_SIZE(real_cmd))
3206                 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3207         return err;
3208 }
3209
3210 static int video_put_user(void __user *arg, void *parg,
3211                           unsigned int real_cmd, unsigned int cmd)
3212 {
3213         if (!(_IOC_DIR(cmd) & _IOC_READ))
3214                 return 0;
3215
3216         if (cmd == real_cmd) {
3217                 /*  Copy results into user buffer  */
3218                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3219                         return -EFAULT;
3220                 return 0;
3221         }
3222
3223         if (in_compat_syscall())
3224                 return v4l2_compat_put_user(arg, parg, cmd);
3225
3226         switch (cmd) {
3227 #ifdef CONFIG_COMPAT_32BIT_TIME
3228         case VIDIOC_DQEVENT_TIME32: {
3229                 struct v4l2_event *ev = parg;
3230                 struct v4l2_event_time32 ev32;
3231
3232                 memset(&ev32, 0, sizeof(ev32));
3233
3234                 ev32.type       = ev->type;
3235                 ev32.pending    = ev->pending;
3236                 ev32.sequence   = ev->sequence;
3237                 ev32.timestamp.tv_sec   = ev->timestamp.tv_sec;
3238                 ev32.timestamp.tv_nsec  = ev->timestamp.tv_nsec;
3239                 ev32.id         = ev->id;
3240
3241                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3242                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3243
3244                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3245                         return -EFAULT;
3246                 break;
3247         }
3248         case VIDIOC_QUERYBUF_TIME32:
3249         case VIDIOC_QBUF_TIME32:
3250         case VIDIOC_DQBUF_TIME32:
3251         case VIDIOC_PREPARE_BUF_TIME32: {
3252                 struct v4l2_buffer *vb = parg;
3253                 struct v4l2_buffer_time32 vb32;
3254
3255                 memset(&vb32, 0, sizeof(vb32));
3256
3257                 vb32.index      = vb->index;
3258                 vb32.type       = vb->type;
3259                 vb32.bytesused  = vb->bytesused;
3260                 vb32.flags      = vb->flags;
3261                 vb32.field      = vb->field;
3262                 vb32.timestamp.tv_sec   = vb->timestamp.tv_sec;
3263                 vb32.timestamp.tv_usec  = vb->timestamp.tv_usec;
3264                 vb32.timecode   = vb->timecode;
3265                 vb32.sequence   = vb->sequence;
3266                 vb32.memory     = vb->memory;
3267                 vb32.m.userptr  = vb->m.userptr;
3268                 vb32.length     = vb->length;
3269                 vb32.request_fd = vb->request_fd;
3270
3271                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3272                         return -EFAULT;
3273                 break;
3274         }
3275 #endif
3276         }
3277
3278         return 0;
3279 }
3280
3281 long
3282 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3283                v4l2_kioctl func)
3284 {
3285         char    sbuf[128];
3286         void    *mbuf = NULL;
3287         void    *parg = (void *)arg;
3288         long    err  = -EINVAL;
3289         bool    has_array_args;
3290         bool    always_copy = false;
3291         size_t  array_size = 0;
3292         void __user *user_ptr = NULL;
3293         void    **kernel_ptr = NULL;
3294         unsigned int cmd = video_translate_cmd(orig_cmd);
3295         const size_t ioc_size = _IOC_SIZE(cmd);
3296
3297         /*  Copy arguments into temp kernel buffer  */
3298         if (_IOC_DIR(cmd) != _IOC_NONE) {
3299                 if (ioc_size <= sizeof(sbuf)) {
3300                         parg = sbuf;
3301                 } else {
3302                         /* too big to allocate from stack */
3303                         mbuf = kvmalloc(ioc_size, GFP_KERNEL);
3304                         if (NULL == mbuf)
3305                                 return -ENOMEM;
3306                         parg = mbuf;
3307                 }
3308
3309                 err = video_get_user((void __user *)arg, parg, cmd,
3310                                      orig_cmd, &always_copy);
3311                 if (err)
3312                         goto out;
3313         }
3314
3315         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3316         if (err < 0)
3317                 goto out;
3318         has_array_args = err;
3319
3320         if (has_array_args) {
3321                 /*
3322                  * When adding new types of array args, make sure that the
3323                  * parent argument to ioctl (which contains the pointer to the
3324                  * array) fits into sbuf (so that mbuf will still remain
3325                  * unused up to here).
3326                  */
3327                 mbuf = kvmalloc(array_size, GFP_KERNEL);
3328                 err = -ENOMEM;
3329                 if (NULL == mbuf)
3330                         goto out_array_args;
3331                 err = -EFAULT;
3332                 if (in_compat_syscall())
3333                         err = v4l2_compat_get_array_args(file, mbuf, user_ptr,
3334                                                          array_size, orig_cmd,
3335                                                          parg);
3336                 else
3337                         err = copy_from_user(mbuf, user_ptr, array_size) ?
3338                                                                 -EFAULT : 0;
3339                 if (err)
3340                         goto out_array_args;
3341                 *kernel_ptr = mbuf;
3342         }
3343
3344         /* Handles IOCTL */
3345         err = func(file, cmd, parg);
3346         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3347                 err = -ENOTTY;
3348                 goto out;
3349         }
3350
3351         if (err == 0) {
3352                 if (cmd == VIDIOC_DQBUF)
3353                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3354                 else if (cmd == VIDIOC_QBUF)
3355                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3356         }
3357
3358         if (has_array_args) {
3359                 *kernel_ptr = (void __force *)user_ptr;
3360                 if (in_compat_syscall()) {
3361                         int put_err;
3362
3363                         put_err = v4l2_compat_put_array_args(file, user_ptr, mbuf,
3364                                                              array_size, orig_cmd,
3365                                                              parg);
3366                         if (put_err)
3367                                 err = put_err;
3368                 } else if (copy_to_user(user_ptr, mbuf, array_size)) {
3369                         err = -EFAULT;
3370                 }
3371                 goto out_array_args;
3372         }
3373         /*
3374          * Some ioctls can return an error, but still have valid
3375          * results that must be returned.
3376          */
3377         if (err < 0 && !always_copy)
3378                 goto out;
3379
3380 out_array_args:
3381         if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3382                 err = -EFAULT;
3383 out:
3384         kvfree(mbuf);
3385         return err;
3386 }
3387
3388 long video_ioctl2(struct file *file,
3389                unsigned int cmd, unsigned long arg)
3390 {
3391         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3392 }
3393 EXPORT_SYMBOL(video_ioctl2);