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/media-device.h> /* for media_set_bus_info() */
  22 #include <media/v4l2-common.h>
  23 #include <media/v4l2-ioctl.h>
  24 #include <media/v4l2-ctrls.h>
  25 #include <media/v4l2-fh.h>
  26 #include <media/v4l2-event.h>
  27 #include <media/v4l2-device.h>
  28 #include <media/videobuf2-v4l2.h>
  29 #include <media/v4l2-mc.h>
  30 #include <media/v4l2-mem2mem.h>
  31
  32 #include <trace/events/v4l2.h>
  33
  34 /* Zero out the end of the struct pointed to by p.  Everything after, but
  35  * not including, the specified field is cleared. */
  36 #define CLEAR_AFTER_FIELD(p, field) \
  37         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  38         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  39
  40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  41
  42 struct std_descr {
  43         v4l2_std_id std;
  44         const char *descr;
  45 };
  46
  47 static const struct std_descr standards[] = {
  48         { V4L2_STD_NTSC,        "NTSC"      },
  49         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  50         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  51         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  52         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  53         { V4L2_STD_PAL,         "PAL"       },
  54         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  55         { V4L2_STD_PAL_B,       "PAL-B"     },
  56         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  57         { V4L2_STD_PAL_G,       "PAL-G"     },
  58         { V4L2_STD_PAL_H,       "PAL-H"     },
  59         { V4L2_STD_PAL_I,       "PAL-I"     },
  60         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  61         { V4L2_STD_PAL_D,       "PAL-D"     },
  62         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  63         { V4L2_STD_PAL_K,       "PAL-K"     },
  64         { V4L2_STD_PAL_M,       "PAL-M"     },
  65         { V4L2_STD_PAL_N,       "PAL-N"     },
  66         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  67         { V4L2_STD_PAL_60,      "PAL-60"    },
  68         { V4L2_STD_SECAM,       "SECAM"     },
  69         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  70         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  71         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  72         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  73         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  74         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  75         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  76         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  77         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  78         { 0,                    "Unknown"   }
  79 };
  80
  81 /* video4linux standard ID conversion to standard name
  82  */
  83 const char *v4l2_norm_to_name(v4l2_std_id id)
  84 {
  85         u32 myid = id;
  86         int i;
  87
  88         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  89            64 bit comparisons. So, on that architecture, with some gcc
  90            variants, compilation fails. Currently, the max value is 30bit wide.
  91          */
  92         BUG_ON(myid != id);
  93
  94         for (i = 0; standards[i].std; i++)
  95                 if (myid == standards[i].std)
  96                         break;
  97         return standards[i].descr;
  98 }
  99 EXPORT_SYMBOL(v4l2_norm_to_name);
 100
 101 /* Returns frame period for the given standard */
 102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 103 {
 104         if (id & V4L2_STD_525_60) {
 105                 frameperiod->numerator = 1001;
 106                 frameperiod->denominator = 30000;
 107         } else {
 108                 frameperiod->numerator = 1;
 109                 frameperiod->denominator = 25;
 110         }
 111 }
 112 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 113
 114 /* Fill in the fields of a v4l2_standard structure according to the
 115    'id' and 'transmission' parameters.  Returns negative on error.  */
 116 int v4l2_video_std_construct(struct v4l2_standard *vs,
 117                              int id, const char *name)
 118 {
 119         vs->id = id;
 120         v4l2_video_std_frame_period(id, &vs->frameperiod);
 121         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 122         strscpy(vs->name, name, sizeof(vs->name));
 123         return 0;
 124 }
 125 EXPORT_SYMBOL(v4l2_video_std_construct);
 126
 127 /* Fill in the fields of a v4l2_standard structure according to the
 128  * 'id' and 'vs->index' parameters. Returns negative on error. */
 129 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 130 {
 131         v4l2_std_id curr_id = 0;
 132         unsigned int index = vs->index, i, j = 0;
 133         const char *descr = "";
 134
 135         /* Return -ENODATA if the id for the current input
 136            or output is 0, meaning that it doesn't support this API. */
 137         if (id == 0)
 138                 return -ENODATA;
 139
 140         /* Return norm array in a canonical way */
 141         for (i = 0; i <= index && id; i++) {
 142                 /* last std value in the standards array is 0, so this
 143                    while always ends there since (id & 0) == 0. */
 144                 while ((id & standards[j].std) != standards[j].std)
 145                         j++;
 146                 curr_id = standards[j].std;
 147                 descr = standards[j].descr;
 148                 j++;
 149                 if (curr_id == 0)
 150                         break;
 151                 if (curr_id != V4L2_STD_PAL &&
 152                                 curr_id != V4L2_STD_SECAM &&
 153                                 curr_id != V4L2_STD_NTSC)
 154                         id &= ~curr_id;
 155         }
 156         if (i <= index)
 157                 return -EINVAL;
 158
 159         v4l2_video_std_construct(vs, curr_id, descr);
 160         return 0;
 161 }
 162
 163 /* ----------------------------------------------------------------- */
 164 /* some arrays for pretty-printing debug messages of enum types      */
 165
 166 const char *v4l2_field_names[] = {
 167         [V4L2_FIELD_ANY]        = "any",
 168         [V4L2_FIELD_NONE]       = "none",
 169         [V4L2_FIELD_TOP]        = "top",
 170         [V4L2_FIELD_BOTTOM]     = "bottom",
 171         [V4L2_FIELD_INTERLACED] = "interlaced",
 172         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 173         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 174         [V4L2_FIELD_ALTERNATE]  = "alternate",
 175         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 176         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 177 };
 178 EXPORT_SYMBOL(v4l2_field_names);
 179
 180 const char *v4l2_type_names[] = {
 181         [0]                                = "0",
 182         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 183         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 184         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 185         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 186         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 187         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 188         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 189         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 190         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 191         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 192         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 193         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 194         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 195         [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 196 };
 197 EXPORT_SYMBOL(v4l2_type_names);
 198
 199 static const char *v4l2_memory_names[] = {
 200         [V4L2_MEMORY_MMAP]    = "mmap",
 201         [V4L2_MEMORY_USERPTR] = "userptr",
 202         [V4L2_MEMORY_OVERLAY] = "overlay",
 203         [V4L2_MEMORY_DMABUF] = "dmabuf",
 204 };
 205
 206 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 207
 208 /* ------------------------------------------------------------------ */
 209 /* debug help functions                                               */
 210
 211 static void v4l_print_querycap(const void *arg, bool write_only)
 212 {
 213         const struct v4l2_capability *p = arg;
 214
 215         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 216                 (int)sizeof(p->driver), p->driver,
 217                 (int)sizeof(p->card), p->card,
 218                 (int)sizeof(p->bus_info), p->bus_info,
 219                 p->version, p->capabilities, p->device_caps);
 220 }
 221
 222 static void v4l_print_enuminput(const void *arg, bool write_only)
 223 {
 224         const struct v4l2_input *p = arg;
 225
 226         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 227                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 228                 p->tuner, (unsigned long long)p->std, p->status,
 229                 p->capabilities);
 230 }
 231
 232 static void v4l_print_enumoutput(const void *arg, bool write_only)
 233 {
 234         const struct v4l2_output *p = arg;
 235
 236         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 237                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 238                 p->modulator, (unsigned long long)p->std, p->capabilities);
 239 }
 240
 241 static void v4l_print_audio(const void *arg, bool write_only)
 242 {
 243         const struct v4l2_audio *p = arg;
 244
 245         if (write_only)
 246                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 247         else
 248                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 249                         p->index, (int)sizeof(p->name), p->name,
 250                         p->capability, p->mode);
 251 }
 252
 253 static void v4l_print_audioout(const void *arg, bool write_only)
 254 {
 255         const struct v4l2_audioout *p = arg;
 256
 257         if (write_only)
 258                 pr_cont("index=%u\n", p->index);
 259         else
 260                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 261                         p->index, (int)sizeof(p->name), p->name,
 262                         p->capability, p->mode);
 263 }
 264
 265 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 266 {
 267         const struct v4l2_fmtdesc *p = arg;
 268
 269         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
 270                 p->index, prt_names(p->type, v4l2_type_names),
 271                 p->flags, &p->pixelformat, p->mbus_code,
 272                 (int)sizeof(p->description), p->description);
 273 }
 274
 275 static void v4l_print_format(const void *arg, bool write_only)
 276 {
 277         const struct v4l2_format *p = arg;
 278         const struct v4l2_pix_format *pix;
 279         const struct v4l2_pix_format_mplane *mp;
 280         const struct v4l2_vbi_format *vbi;
 281         const struct v4l2_sliced_vbi_format *sliced;
 282         const struct v4l2_window *win;
 283         const struct v4l2_meta_format *meta;
 284         u32 pixelformat;
 285         u32 planes;
 286         unsigned i;
 287
 288         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 289         switch (p->type) {
 290         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 291         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 292                 pix = &p->fmt.pix;
 293                 pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 294                         pix->width, pix->height, &pix->pixelformat,
 295                         prt_names(pix->field, v4l2_field_names),
 296                         pix->bytesperline, pix->sizeimage,
 297                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 298                         pix->quantization, pix->xfer_func);
 299                 break;
 300         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 301         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 302                 mp = &p->fmt.pix_mp;
 303                 pixelformat = mp->pixelformat;
 304                 pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 305                         mp->width, mp->height, &pixelformat,
 306                         prt_names(mp->field, v4l2_field_names),
 307                         mp->colorspace, mp->num_planes, mp->flags,
 308                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 309                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 310                 for (i = 0; i < planes; i++)
 311                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 312                                         mp->plane_fmt[i].bytesperline,
 313                                         mp->plane_fmt[i].sizeimage);
 314                 break;
 315         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 316         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 317                 win = &p->fmt.win;
 318                 /* Note: we can't print the clip list here since the clips
 319                  * pointer is a userspace pointer, not a kernelspace
 320                  * pointer. */
 321                 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",
 322                         win->w.width, win->w.height, win->w.left, win->w.top,
 323                         prt_names(win->field, v4l2_field_names),
 324                         win->chromakey, win->clipcount, win->clips,
 325                         win->bitmap, win->global_alpha);
 326                 break;
 327         case V4L2_BUF_TYPE_VBI_CAPTURE:
 328         case V4L2_BUF_TYPE_VBI_OUTPUT:
 329                 vbi = &p->fmt.vbi;
 330                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
 331                         vbi->sampling_rate, vbi->offset,
 332                         vbi->samples_per_line, &vbi->sample_format,
 333                         vbi->start[0], vbi->start[1],
 334                         vbi->count[0], vbi->count[1]);
 335                 break;
 336         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 337         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 338                 sliced = &p->fmt.sliced;
 339                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 340                                 sliced->service_set, sliced->io_size);
 341                 for (i = 0; i < 24; i++)
 342                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 343                                 sliced->service_lines[0][i],
 344                                 sliced->service_lines[1][i]);
 345                 break;
 346         case V4L2_BUF_TYPE_SDR_CAPTURE:
 347         case V4L2_BUF_TYPE_SDR_OUTPUT:
 348                 pixelformat = p->fmt.sdr.pixelformat;
 349                 pr_cont(", pixelformat=%p4cc\n", &pixelformat);
 350                 break;
 351         case V4L2_BUF_TYPE_META_CAPTURE:
 352         case V4L2_BUF_TYPE_META_OUTPUT:
 353                 meta = &p->fmt.meta;
 354                 pixelformat = meta->dataformat;
 355                 pr_cont(", dataformat=%p4cc, buffersize=%u\n",
 356                         &pixelformat, meta->buffersize);
 357                 break;
 358         }
 359 }
 360
 361 static void v4l_print_framebuffer(const void *arg, bool write_only)
 362 {
 363         const struct v4l2_framebuffer *p = arg;
 364
 365         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 366                 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
 367                 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
 368                 p->fmt.colorspace);
 369 }
 370
 371 static void v4l_print_buftype(const void *arg, bool write_only)
 372 {
 373         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 374 }
 375
 376 static void v4l_print_modulator(const void *arg, bool write_only)
 377 {
 378         const struct v4l2_modulator *p = arg;
 379
 380         if (write_only)
 381                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 382         else
 383                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 384                         p->index, (int)sizeof(p->name), p->name, p->capability,
 385                         p->rangelow, p->rangehigh, p->txsubchans);
 386 }
 387
 388 static void v4l_print_tuner(const void *arg, bool write_only)
 389 {
 390         const struct v4l2_tuner *p = arg;
 391
 392         if (write_only)
 393                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 394         else
 395                 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",
 396                         p->index, (int)sizeof(p->name), p->name, p->type,
 397                         p->capability, p->rangelow,
 398                         p->rangehigh, p->signal, p->afc,
 399                         p->rxsubchans, p->audmode);
 400 }
 401
 402 static void v4l_print_frequency(const void *arg, bool write_only)
 403 {
 404         const struct v4l2_frequency *p = arg;
 405
 406         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 407                                 p->tuner, p->type, p->frequency);
 408 }
 409
 410 static void v4l_print_standard(const void *arg, bool write_only)
 411 {
 412         const struct v4l2_standard *p = arg;
 413
 414         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 415                 p->index,
 416                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 417                 p->frameperiod.numerator,
 418                 p->frameperiod.denominator,
 419                 p->framelines);
 420 }
 421
 422 static void v4l_print_std(const void *arg, bool write_only)
 423 {
 424         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 425 }
 426
 427 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 428 {
 429         const struct v4l2_hw_freq_seek *p = arg;
 430
 431         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 432                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 433                 p->rangelow, p->rangehigh);
 434 }
 435
 436 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 437 {
 438         const struct v4l2_requestbuffers *p = arg;
 439
 440         pr_cont("count=%d, type=%s, memory=%s\n",
 441                 p->count,
 442                 prt_names(p->type, v4l2_type_names),
 443                 prt_names(p->memory, v4l2_memory_names));
 444 }
 445
 446 static void v4l_print_buffer(const void *arg, bool write_only)
 447 {
 448         const struct v4l2_buffer *p = arg;
 449         const struct v4l2_timecode *tc = &p->timecode;
 450         const struct v4l2_plane *plane;
 451         int i;
 452
 453         pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 454                         (int)p->timestamp.tv_sec / 3600,
 455                         ((int)p->timestamp.tv_sec / 60) % 60,
 456                         ((int)p->timestamp.tv_sec % 60),
 457                         (long)p->timestamp.tv_usec,
 458                         p->index,
 459                         prt_names(p->type, v4l2_type_names), p->request_fd,
 460                         p->flags, prt_names(p->field, v4l2_field_names),
 461                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 462
 463         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 464                 pr_cont("\n");
 465                 for (i = 0; i < p->length; ++i) {
 466                         plane = &p->m.planes[i];
 467                         printk(KERN_DEBUG
 468                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 469                                 i, plane->bytesused, plane->data_offset,
 470                                 plane->m.userptr, plane->length);
 471                 }
 472         } else {
 473                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 474                         p->bytesused, p->m.userptr, p->length);
 475         }
 476
 477         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 478                         tc->hours, tc->minutes, tc->seconds,
 479                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 480 }
 481
 482 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 483 {
 484         const struct v4l2_exportbuffer *p = arg;
 485
 486         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 487                 p->fd, prt_names(p->type, v4l2_type_names),
 488                 p->index, p->plane, p->flags);
 489 }
 490
 491 static void v4l_print_create_buffers(const void *arg, bool write_only)
 492 {
 493         const struct v4l2_create_buffers *p = arg;
 494
 495         pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ",
 496                 p->index, p->count, prt_names(p->memory, v4l2_memory_names),
 497                 p->capabilities);
 498         v4l_print_format(&p->format, write_only);
 499 }
 500
 501 static void v4l_print_streamparm(const void *arg, bool write_only)
 502 {
 503         const struct v4l2_streamparm *p = arg;
 504
 505         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 506
 507         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 508             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 509                 const struct v4l2_captureparm *c = &p->parm.capture;
 510
 511                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 512                         c->capability, c->capturemode,
 513                         c->timeperframe.numerator, c->timeperframe.denominator,
 514                         c->extendedmode, c->readbuffers);
 515         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 516                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 517                 const struct v4l2_outputparm *c = &p->parm.output;
 518
 519                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 520                         c->capability, c->outputmode,
 521                         c->timeperframe.numerator, c->timeperframe.denominator,
 522                         c->extendedmode, c->writebuffers);
 523         } else {
 524                 pr_cont("\n");
 525         }
 526 }
 527
 528 static void v4l_print_queryctrl(const void *arg, bool write_only)
 529 {
 530         const struct v4l2_queryctrl *p = arg;
 531
 532         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 533                         p->id, p->type, (int)sizeof(p->name), p->name,
 534                         p->minimum, p->maximum,
 535                         p->step, p->default_value, p->flags);
 536 }
 537
 538 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 539 {
 540         const struct v4l2_query_ext_ctrl *p = arg;
 541
 542         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 543                         p->id, p->type, (int)sizeof(p->name), p->name,
 544                         p->minimum, p->maximum,
 545                         p->step, p->default_value, p->flags,
 546                         p->elem_size, p->elems, p->nr_of_dims,
 547                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 548 }
 549
 550 static void v4l_print_querymenu(const void *arg, bool write_only)
 551 {
 552         const struct v4l2_querymenu *p = arg;
 553
 554         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 555 }
 556
 557 static void v4l_print_control(const void *arg, bool write_only)
 558 {
 559         const struct v4l2_control *p = arg;
 560         const char *name = v4l2_ctrl_get_name(p->id);
 561
 562         if (name)
 563                 pr_cont("name=%s, ", name);
 564         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 565 }
 566
 567 static void v4l_print_ext_controls(const void *arg, bool write_only)
 568 {
 569         const struct v4l2_ext_controls *p = arg;
 570         int i;
 571
 572         pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 573                         p->which, p->count, p->error_idx, p->request_fd);
 574         for (i = 0; i < p->count; i++) {
 575                 unsigned int id = p->controls[i].id;
 576                 const char *name = v4l2_ctrl_get_name(id);
 577
 578                 if (name)
 579                         pr_cont(", name=%s", name);
 580                 if (!p->controls[i].size)
 581                         pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
 582                 else
 583                         pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
 584         }
 585         pr_cont("\n");
 586 }
 587
 588 static void v4l_print_cropcap(const void *arg, bool write_only)
 589 {
 590         const struct v4l2_cropcap *p = arg;
 591
 592         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 593                 prt_names(p->type, v4l2_type_names),
 594                 p->bounds.width, p->bounds.height,
 595                 p->bounds.left, p->bounds.top,
 596                 p->defrect.width, p->defrect.height,
 597                 p->defrect.left, p->defrect.top,
 598                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 599 }
 600
 601 static void v4l_print_crop(const void *arg, bool write_only)
 602 {
 603         const struct v4l2_crop *p = arg;
 604
 605         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 606                 prt_names(p->type, v4l2_type_names),
 607                 p->c.width, p->c.height,
 608                 p->c.left, p->c.top);
 609 }
 610
 611 static void v4l_print_selection(const void *arg, bool write_only)
 612 {
 613         const struct v4l2_selection *p = arg;
 614
 615         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 616                 prt_names(p->type, v4l2_type_names),
 617                 p->target, p->flags,
 618                 p->r.width, p->r.height, p->r.left, p->r.top);
 619 }
 620
 621 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 622 {
 623         const struct v4l2_jpegcompression *p = arg;
 624
 625         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 626                 p->quality, p->APPn, p->APP_len,
 627                 p->COM_len, p->jpeg_markers);
 628 }
 629
 630 static void v4l_print_enc_idx(const void *arg, bool write_only)
 631 {
 632         const struct v4l2_enc_idx *p = arg;
 633
 634         pr_cont("entries=%d, entries_cap=%d\n",
 635                         p->entries, p->entries_cap);
 636 }
 637
 638 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 639 {
 640         const struct v4l2_encoder_cmd *p = arg;
 641
 642         pr_cont("cmd=%d, flags=0x%x\n",
 643                         p->cmd, p->flags);
 644 }
 645
 646 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 647 {
 648         const struct v4l2_decoder_cmd *p = arg;
 649
 650         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 651
 652         if (p->cmd == V4L2_DEC_CMD_START)
 653                 pr_info("speed=%d, format=%u\n",
 654                                 p->start.speed, p->start.format);
 655         else if (p->cmd == V4L2_DEC_CMD_STOP)
 656                 pr_info("pts=%llu\n", p->stop.pts);
 657 }
 658
 659 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 660 {
 661         const struct v4l2_dbg_chip_info *p = arg;
 662
 663         pr_cont("type=%u, ", p->match.type);
 664         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 665                 pr_cont("name=%.*s, ",
 666                                 (int)sizeof(p->match.name), p->match.name);
 667         else
 668                 pr_cont("addr=%u, ", p->match.addr);
 669         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 670 }
 671
 672 static void v4l_print_dbg_register(const void *arg, bool write_only)
 673 {
 674         const struct v4l2_dbg_register *p = arg;
 675
 676         pr_cont("type=%u, ", p->match.type);
 677         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 678                 pr_cont("name=%.*s, ",
 679                                 (int)sizeof(p->match.name), p->match.name);
 680         else
 681                 pr_cont("addr=%u, ", p->match.addr);
 682         pr_cont("reg=0x%llx, val=0x%llx\n",
 683                         p->reg, p->val);
 684 }
 685
 686 static void v4l_print_dv_timings(const void *arg, bool write_only)
 687 {
 688         const struct v4l2_dv_timings *p = arg;
 689
 690         switch (p->type) {
 691         case V4L2_DV_BT_656_1120:
 692                 pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 693                                 p->bt.interlaced, p->bt.pixelclock,
 694                                 p->bt.width, p->bt.height,
 695                                 p->bt.polarities, p->bt.hfrontporch,
 696                                 p->bt.hsync, p->bt.hbackporch,
 697                                 p->bt.vfrontporch, p->bt.vsync,
 698                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 699                                 p->bt.il_vsync, p->bt.il_vbackporch,
 700                                 p->bt.standards, p->bt.flags);
 701                 break;
 702         default:
 703                 pr_cont("type=%d\n", p->type);
 704                 break;
 705         }
 706 }
 707
 708 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 709 {
 710         const struct v4l2_enum_dv_timings *p = arg;
 711
 712         pr_cont("index=%u, ", p->index);
 713         v4l_print_dv_timings(&p->timings, write_only);
 714 }
 715
 716 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 717 {
 718         const struct v4l2_dv_timings_cap *p = arg;
 719
 720         switch (p->type) {
 721         case V4L2_DV_BT_656_1120:
 722                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 723                         p->bt.min_width, p->bt.max_width,
 724                         p->bt.min_height, p->bt.max_height,
 725                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 726                         p->bt.standards, p->bt.capabilities);
 727                 break;
 728         default:
 729                 pr_cont("type=%u\n", p->type);
 730                 break;
 731         }
 732 }
 733
 734 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 735 {
 736         const struct v4l2_frmsizeenum *p = arg;
 737
 738         pr_cont("index=%u, pixelformat=%p4cc, type=%u",
 739                 p->index, &p->pixel_format, p->type);
 740         switch (p->type) {
 741         case V4L2_FRMSIZE_TYPE_DISCRETE:
 742                 pr_cont(", wxh=%ux%u\n",
 743                         p->discrete.width, p->discrete.height);
 744                 break;
 745         case V4L2_FRMSIZE_TYPE_STEPWISE:
 746                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 747                                 p->stepwise.min_width,
 748                                 p->stepwise.min_height,
 749                                 p->stepwise.max_width,
 750                                 p->stepwise.max_height,
 751                                 p->stepwise.step_width,
 752                                 p->stepwise.step_height);
 753                 break;
 754         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 755         default:
 756                 pr_cont("\n");
 757                 break;
 758         }
 759 }
 760
 761 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 762 {
 763         const struct v4l2_frmivalenum *p = arg;
 764
 765         pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
 766                 p->index, &p->pixel_format, p->width, p->height, p->type);
 767         switch (p->type) {
 768         case V4L2_FRMIVAL_TYPE_DISCRETE:
 769                 pr_cont(", fps=%d/%d\n",
 770                                 p->discrete.numerator,
 771                                 p->discrete.denominator);
 772                 break;
 773         case V4L2_FRMIVAL_TYPE_STEPWISE:
 774                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 775                                 p->stepwise.min.numerator,
 776                                 p->stepwise.min.denominator,
 777                                 p->stepwise.max.numerator,
 778                                 p->stepwise.max.denominator,
 779                                 p->stepwise.step.numerator,
 780                                 p->stepwise.step.denominator);
 781                 break;
 782         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 783         default:
 784                 pr_cont("\n");
 785                 break;
 786         }
 787 }
 788
 789 static void v4l_print_event(const void *arg, bool write_only)
 790 {
 791         const struct v4l2_event *p = arg;
 792         const struct v4l2_event_ctrl *c;
 793
 794         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 795                         p->type, p->pending, p->sequence, p->id,
 796                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 797         switch (p->type) {
 798         case V4L2_EVENT_VSYNC:
 799                 printk(KERN_DEBUG "field=%s\n",
 800                         prt_names(p->u.vsync.field, v4l2_field_names));
 801                 break;
 802         case V4L2_EVENT_CTRL:
 803                 c = &p->u.ctrl;
 804                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 805                         c->changes, c->type);
 806                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 807                         pr_cont("value64=%lld, ", c->value64);
 808                 else
 809                         pr_cont("value=%d, ", c->value);
 810                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 811                         c->flags, c->minimum, c->maximum,
 812                         c->step, c->default_value);
 813                 break;
 814         case V4L2_EVENT_FRAME_SYNC:
 815                 pr_cont("frame_sequence=%u\n",
 816                         p->u.frame_sync.frame_sequence);
 817                 break;
 818         }
 819 }
 820
 821 static void v4l_print_event_subscription(const void *arg, bool write_only)
 822 {
 823         const struct v4l2_event_subscription *p = arg;
 824
 825         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 826                         p->type, p->id, p->flags);
 827 }
 828
 829 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 830 {
 831         const struct v4l2_sliced_vbi_cap *p = arg;
 832         int i;
 833
 834         pr_cont("type=%s, service_set=0x%08x\n",
 835                         prt_names(p->type, v4l2_type_names), p->service_set);
 836         for (i = 0; i < 24; i++)
 837                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 838                                 p->service_lines[0][i],
 839                                 p->service_lines[1][i]);
 840 }
 841
 842 static void v4l_print_freq_band(const void *arg, bool write_only)
 843 {
 844         const struct v4l2_frequency_band *p = arg;
 845
 846         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 847                         p->tuner, p->type, p->index,
 848                         p->capability, p->rangelow,
 849                         p->rangehigh, p->modulation);
 850 }
 851
 852 static void v4l_print_edid(const void *arg, bool write_only)
 853 {
 854         const struct v4l2_edid *p = arg;
 855
 856         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 857                 p->pad, p->start_block, p->blocks);
 858 }
 859
 860 static void v4l_print_u32(const void *arg, bool write_only)
 861 {
 862         pr_cont("value=%u\n", *(const u32 *)arg);
 863 }
 864
 865 static void v4l_print_newline(const void *arg, bool write_only)
 866 {
 867         pr_cont("\n");
 868 }
 869
 870 static void v4l_print_default(const void *arg, bool write_only)
 871 {
 872         pr_cont("driver-specific ioctl\n");
 873 }
 874
 875 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
 876 {
 877         __u32 i;
 878
 879         /* zero the reserved fields */
 880         c->reserved[0] = 0;
 881         for (i = 0; i < c->count; i++)
 882                 c->controls[i].reserved2[0] = 0;
 883
 884         switch (c->which) {
 885         case V4L2_CID_PRIVATE_BASE:
 886                 /*
 887                  * V4L2_CID_PRIVATE_BASE cannot be used as control class
 888                  * when using extended controls.
 889                  * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 890                  * is it allowed for backwards compatibility.
 891                  */
 892                 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
 893                         return false;
 894                 break;
 895         case V4L2_CTRL_WHICH_DEF_VAL:
 896                 /* Default value cannot be changed */
 897                 if (ioctl == VIDIOC_S_EXT_CTRLS ||
 898                     ioctl == VIDIOC_TRY_EXT_CTRLS) {
 899                         c->error_idx = c->count;
 900                         return false;
 901                 }
 902                 return true;
 903         case V4L2_CTRL_WHICH_CUR_VAL:
 904                 return true;
 905         case V4L2_CTRL_WHICH_REQUEST_VAL:
 906                 c->error_idx = c->count;
 907                 return false;
 908         }
 909
 910         /* Check that all controls are from the same control class. */
 911         for (i = 0; i < c->count; i++) {
 912                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 913                         c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
 914                                                                       c->count;
 915                         return false;
 916                 }
 917         }
 918         return true;
 919 }
 920
 921 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 922 {
 923         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 924                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 925                              V4L2_CAP_VIDEO_OUTPUT |
 926                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 927                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 928         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 929                               V4L2_CAP_META_OUTPUT;
 930         struct video_device *vfd = video_devdata(file);
 931         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 932         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 933                       (vfd->device_caps & vid_caps);
 934         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 935         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 936         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 937         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 938                        (vfd->device_caps & meta_caps);
 939         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 940         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 941
 942         if (ops == NULL)
 943                 return -EINVAL;
 944
 945         switch (type) {
 946         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 947                 if ((is_vid || is_tch) && is_rx &&
 948                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 949                         return 0;
 950                 break;
 951         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 952                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 953                         return 0;
 954                 break;
 955         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 956                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 957                         return 0;
 958                 break;
 959         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 960                 if (is_vid && is_tx &&
 961                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 962                         return 0;
 963                 break;
 964         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 965                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 966                         return 0;
 967                 break;
 968         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 969                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 970                         return 0;
 971                 break;
 972         case V4L2_BUF_TYPE_VBI_CAPTURE:
 973                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 974                         return 0;
 975                 break;
 976         case V4L2_BUF_TYPE_VBI_OUTPUT:
 977                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 978                         return 0;
 979                 break;
 980         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 981                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 982                         return 0;
 983                 break;
 984         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 985                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 986                         return 0;
 987                 break;
 988         case V4L2_BUF_TYPE_SDR_CAPTURE:
 989                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 990                         return 0;
 991                 break;
 992         case V4L2_BUF_TYPE_SDR_OUTPUT:
 993                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 994                         return 0;
 995                 break;
 996         case V4L2_BUF_TYPE_META_CAPTURE:
 997                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
 998                         return 0;
 999                 break;
1000         case V4L2_BUF_TYPE_META_OUTPUT:
1001                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
1002                         return 0;
1003                 break;
1004         default:
1005                 break;
1006         }
1007         return -EINVAL;
1008 }
1009
1010 static void v4l_sanitize_format(struct v4l2_format *fmt)
1011 {
1012         unsigned int offset;
1013
1014         /* Make sure num_planes is not bogus */
1015         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1016             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1017                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1018                                                VIDEO_MAX_PLANES);
1019
1020         /*
1021          * The v4l2_pix_format structure has been extended with fields that were
1022          * not previously required to be set to zero by applications. The priv
1023          * field, when set to a magic value, indicates the the extended fields
1024          * are valid. Otherwise they will contain undefined values. To simplify
1025          * the API towards drivers zero the extended fields and set the priv
1026          * field to the magic value when the extended pixel format structure
1027          * isn't used by applications.
1028          */
1029
1030         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1031             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1032                 return;
1033
1034         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1035                 return;
1036
1037         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1038
1039         offset = offsetof(struct v4l2_pix_format, priv)
1040                + sizeof(fmt->fmt.pix.priv);
1041         memset(((void *)&fmt->fmt.pix) + offset, 0,
1042                sizeof(fmt->fmt.pix) - offset);
1043 }
1044
1045 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1046                                 struct file *file, void *fh, void *arg)
1047 {
1048         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1049         struct video_device *vfd = video_devdata(file);
1050         int ret;
1051
1052         cap->version = LINUX_VERSION_CODE;
1053         cap->device_caps = vfd->device_caps;
1054         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1055
1056         media_set_bus_info(cap->bus_info, sizeof(cap->bus_info),
1057                            vfd->dev_parent);
1058
1059         ret = ops->vidioc_querycap(file, fh, cap);
1060
1061         /*
1062          * Drivers must not change device_caps, so check for this and
1063          * warn if this happened.
1064          */
1065         WARN_ON(cap->device_caps != vfd->device_caps);
1066         /*
1067          * Check that capabilities is a superset of
1068          * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1069          */
1070         WARN_ON((cap->capabilities &
1071                  (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1072                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1073         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1074         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1075
1076         return ret;
1077 }
1078
1079 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1080                        struct file *file, void *fh, void *arg)
1081 {
1082         struct video_device *vfd = video_devdata(file);
1083
1084         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1085                 *(int *)arg = 0;
1086                 return 0;
1087         }
1088
1089         return ops->vidioc_g_input(file, fh, arg);
1090 }
1091
1092 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1093                         struct file *file, void *fh, void *arg)
1094 {
1095         struct video_device *vfd = video_devdata(file);
1096
1097         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1098                 *(int *)arg = 0;
1099                 return 0;
1100         }
1101
1102         return ops->vidioc_g_output(file, fh, arg);
1103 }
1104
1105 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1106                                 struct file *file, void *fh, void *arg)
1107 {
1108         struct video_device *vfd = video_devdata(file);
1109         int ret;
1110
1111         ret = v4l_enable_media_source(vfd);
1112         if (ret)
1113                 return ret;
1114
1115         if (vfd->device_caps & V4L2_CAP_IO_MC)
1116                 return  *(int *)arg ? -EINVAL : 0;
1117
1118         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1119 }
1120
1121 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1122                                 struct file *file, void *fh, void *arg)
1123 {
1124         struct video_device *vfd = video_devdata(file);
1125
1126         if (vfd->device_caps & V4L2_CAP_IO_MC)
1127                 return  *(int *)arg ? -EINVAL : 0;
1128
1129         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1130 }
1131
1132 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1133                                 struct file *file, void *fh, void *arg)
1134 {
1135         struct video_device *vfd;
1136         u32 *p = arg;
1137
1138         vfd = video_devdata(file);
1139         *p = v4l2_prio_max(vfd->prio);
1140         return 0;
1141 }
1142
1143 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1144                                 struct file *file, void *fh, void *arg)
1145 {
1146         struct video_device *vfd;
1147         struct v4l2_fh *vfh;
1148         u32 *p = arg;
1149
1150         vfd = video_devdata(file);
1151         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1152                 return -ENOTTY;
1153         vfh = file->private_data;
1154         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1155 }
1156
1157 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1158                                 struct file *file, void *fh, void *arg)
1159 {
1160         struct video_device *vfd = video_devdata(file);
1161         struct v4l2_input *p = arg;
1162
1163         /*
1164          * We set the flags for CAP_DV_TIMINGS &
1165          * CAP_STD here based on ioctl handler provided by the
1166          * driver. If the driver doesn't support these
1167          * for a specific input, it must override these flags.
1168          */
1169         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1170                 p->capabilities |= V4L2_IN_CAP_STD;
1171
1172         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1173                 if (p->index)
1174                         return -EINVAL;
1175                 strscpy(p->name, vfd->name, sizeof(p->name));
1176                 p->type = V4L2_INPUT_TYPE_CAMERA;
1177                 return 0;
1178         }
1179
1180         return ops->vidioc_enum_input(file, fh, p);
1181 }
1182
1183 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1184                                 struct file *file, void *fh, void *arg)
1185 {
1186         struct video_device *vfd = video_devdata(file);
1187         struct v4l2_output *p = arg;
1188
1189         /*
1190          * We set the flags for CAP_DV_TIMINGS &
1191          * CAP_STD here based on ioctl handler provided by the
1192          * driver. If the driver doesn't support these
1193          * for a specific output, it must override these flags.
1194          */
1195         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1196                 p->capabilities |= V4L2_OUT_CAP_STD;
1197
1198         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1199                 if (p->index)
1200                         return -EINVAL;
1201                 strscpy(p->name, vfd->name, sizeof(p->name));
1202                 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1203                 return 0;
1204         }
1205
1206         return ops->vidioc_enum_output(file, fh, p);
1207 }
1208
1209 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1210 {
1211         const unsigned sz = sizeof(fmt->description);
1212         const char *descr = NULL;
1213         u32 flags = 0;
1214
1215         /*
1216          * We depart from the normal coding style here since the descriptions
1217          * should be aligned so it is easy to see which descriptions will be
1218          * longer than 31 characters (the max length for a description).
1219          * And frankly, this is easier to read anyway.
1220          *
1221          * Note that gcc will use O(log N) comparisons to find the right case.
1222          */
1223         switch (fmt->pixelformat) {
1224         /* Max description length mask: descr = "0123456789012345678901234567890" */
1225         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1226         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1227         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1228         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1229         case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1230         case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1231         case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1232         case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1233         case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1234         case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1235         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1236         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1237         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1238         case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1239         case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1240         case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1241         case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1242         case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1243         case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1244         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1245         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1246         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1247         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1248         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1249         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1250         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1251         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1252         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1253         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1254         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1255         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1256         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1257         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1258         case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1259         case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1260         case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1261         case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1262         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1263         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1264         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1265         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1266         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1267         case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1268         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1269         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1270         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1271         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1272         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1273         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1274         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1275         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1276         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1277         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1278         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1279         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1280         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1281         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1282         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1283         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1284         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1285         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1286         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1287         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1288         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1289         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1290         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1291         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1292         case V4L2_PIX_FMT_YUV24:        descr = "24-bit YUV 4:4:4 8-8-8"; break;
1293         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1294         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1295         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1296         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1297         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1298         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1299         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1300         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1301         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1302         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1303         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1304         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1305         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1306         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1307         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1308         case V4L2_PIX_FMT_NV12_4L4:     descr = "Y/CbCr 4:2:0 (4x4 Linear)"; break;
1309         case V4L2_PIX_FMT_NV12_16L16:   descr = "Y/CbCr 4:2:0 (16x16 Linear)"; break;
1310         case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/CbCr 4:2:0 (32x32 Linear)"; break;
1311         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1312         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1313         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1314         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1315         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1316         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1317         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1318         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1319         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1320         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1321         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1322         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1323         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1324         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1325         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1326         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1327         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1328         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1329         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1330         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1331         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1332         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1333         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1334         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1335         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1336         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1337         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1338         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1339         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1340         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1341         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1342         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1343         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1344         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1345         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1346         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1347         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1348         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1349         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1350         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1351         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1352         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1353         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1354         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1355         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1356         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1357         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1358         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1359         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1360         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1361         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1362         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1363         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1364         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1365         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1366         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1367         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1368         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1369         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1370         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1371         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1372         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1373         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1374         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1375         case V4L2_PIX_FMT_MM21:         descr = "Mediatek 8-bit Block Format"; break;
1376         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1377         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1378         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1379         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1380         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1381         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1382         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1383         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1384         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1385         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1386         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1387         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1388         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1389         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1390         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1391         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1392         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1393         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1394         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1395         case V4L2_META_FMT_RK_ISP1_PARAMS:      descr = "Rockchip ISP1 3A Parameters"; break;
1396         case V4L2_META_FMT_RK_ISP1_STAT_3A:     descr = "Rockchip ISP1 3A Statistics"; break;
1397         case V4L2_PIX_FMT_NV12M_8L128:  descr = "NV12M (8x128 Linear)"; break;
1398         case V4L2_PIX_FMT_NV12M_10BE_8L128:     descr = "10-bit NV12M (8x128 Linear, BE)"; break;
1399
1400         default:
1401                 /* Compressed formats */
1402                 flags = V4L2_FMT_FLAG_COMPRESSED;
1403                 switch (fmt->pixelformat) {
1404                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1405                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1406                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1407                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1408                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1409                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1410                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1411                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1412                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1413                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1414                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1415                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1416                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1417                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1418                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1419                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1420                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1421                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1422                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1423                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1424                 case V4L2_PIX_FMT_VP9_FRAME:    descr = "VP9 Frame"; break;
1425                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1426                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1427                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1428                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1429                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1430                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1431                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1432                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1433                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1434                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1435                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1436                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1437                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1438                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1439                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1440                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1441                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1442                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1443                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1444                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1445                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1446                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1447                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1448                 case V4L2_PIX_FMT_QC08C:        descr = "QCOM Compressed 8-bit Format"; break;
1449                 case V4L2_PIX_FMT_QC10C:        descr = "QCOM Compressed 10-bit Format"; break;
1450                 default:
1451                         if (fmt->description[0])
1452                                 return;
1453                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1454                         flags = 0;
1455                         snprintf(fmt->description, sz, "%p4cc",
1456                                  &fmt->pixelformat);
1457                         break;
1458                 }
1459         }
1460
1461         if (descr)
1462                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1463         fmt->flags |= flags;
1464 }
1465
1466 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1467                                 struct file *file, void *fh, void *arg)
1468 {
1469         struct video_device *vdev = video_devdata(file);
1470         struct v4l2_fmtdesc *p = arg;
1471         int ret = check_fmt(file, p->type);
1472         u32 mbus_code;
1473         u32 cap_mask;
1474
1475         if (ret)
1476                 return ret;
1477         ret = -EINVAL;
1478
1479         if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1480                 p->mbus_code = 0;
1481
1482         mbus_code = p->mbus_code;
1483         CLEAR_AFTER_FIELD(p, type);
1484         p->mbus_code = mbus_code;
1485
1486         switch (p->type) {
1487         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1488         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1489                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1490                            V4L2_CAP_VIDEO_M2M_MPLANE;
1491                 if (!!(vdev->device_caps & cap_mask) !=
1492                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1493                         break;
1494
1495                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1496                         break;
1497                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1498                 break;
1499         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1500                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1501                         break;
1502                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1503                 break;
1504         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1505         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1506                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1507                            V4L2_CAP_VIDEO_M2M_MPLANE;
1508                 if (!!(vdev->device_caps & cap_mask) !=
1509                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1510                         break;
1511
1512                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1513                         break;
1514                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1515                 break;
1516         case V4L2_BUF_TYPE_SDR_CAPTURE:
1517                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1518                         break;
1519                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1520                 break;
1521         case V4L2_BUF_TYPE_SDR_OUTPUT:
1522                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1523                         break;
1524                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1525                 break;
1526         case V4L2_BUF_TYPE_META_CAPTURE:
1527                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1528                         break;
1529                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1530                 break;
1531         case V4L2_BUF_TYPE_META_OUTPUT:
1532                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1533                         break;
1534                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1535                 break;
1536         }
1537         if (ret == 0)
1538                 v4l_fill_fmtdesc(p);
1539         return ret;
1540 }
1541
1542 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1543 {
1544         /*
1545          * The v4l2_pix_format structure contains fields that make no sense for
1546          * touch. Set them to default values in this case.
1547          */
1548
1549         p->field = V4L2_FIELD_NONE;
1550         p->colorspace = V4L2_COLORSPACE_RAW;
1551         p->flags = 0;
1552         p->ycbcr_enc = 0;
1553         p->quantization = 0;
1554         p->xfer_func = 0;
1555 }
1556
1557 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1558                                 struct file *file, void *fh, void *arg)
1559 {
1560         struct v4l2_format *p = arg;
1561         struct video_device *vfd = video_devdata(file);
1562         int ret = check_fmt(file, p->type);
1563
1564         if (ret)
1565                 return ret;
1566
1567         /*
1568          * fmt can't be cleared for these overlay types due to the 'clips'
1569          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1570          * Those are provided by the user. So handle these two overlay types
1571          * first, and then just do a simple memset for the other types.
1572          */
1573         switch (p->type) {
1574         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1575         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1576                 struct v4l2_clip *clips = p->fmt.win.clips;
1577                 u32 clipcount = p->fmt.win.clipcount;
1578                 void __user *bitmap = p->fmt.win.bitmap;
1579
1580                 memset(&p->fmt, 0, sizeof(p->fmt));
1581                 p->fmt.win.clips = clips;
1582                 p->fmt.win.clipcount = clipcount;
1583                 p->fmt.win.bitmap = bitmap;
1584                 break;
1585         }
1586         default:
1587                 memset(&p->fmt, 0, sizeof(p->fmt));
1588                 break;
1589         }
1590
1591         switch (p->type) {
1592         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1593                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1594                         break;
1595                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1596                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1597                 /* just in case the driver zeroed it again */
1598                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1599                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1600                         v4l_pix_format_touch(&p->fmt.pix);
1601                 return ret;
1602         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1603                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1604         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1605                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1606         case V4L2_BUF_TYPE_VBI_CAPTURE:
1607                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1608         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1609                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1610         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1611                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1612                         break;
1613                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1614                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1615                 /* just in case the driver zeroed it again */
1616                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1617                 return ret;
1618         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1619                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1620         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1621                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1622         case V4L2_BUF_TYPE_VBI_OUTPUT:
1623                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1624         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1625                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1626         case V4L2_BUF_TYPE_SDR_CAPTURE:
1627                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1628         case V4L2_BUF_TYPE_SDR_OUTPUT:
1629                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1630         case V4L2_BUF_TYPE_META_CAPTURE:
1631                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1632         case V4L2_BUF_TYPE_META_OUTPUT:
1633                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1634         }
1635         return -EINVAL;
1636 }
1637
1638 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1639                                 struct file *file, void *fh, void *arg)
1640 {
1641         struct v4l2_format *p = arg;
1642         struct video_device *vfd = video_devdata(file);
1643         int ret = check_fmt(file, p->type);
1644         unsigned int i;
1645
1646         if (ret)
1647                 return ret;
1648
1649         ret = v4l_enable_media_source(vfd);
1650         if (ret)
1651                 return ret;
1652         v4l_sanitize_format(p);
1653
1654         switch (p->type) {
1655         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1656                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1657                         break;
1658                 CLEAR_AFTER_FIELD(p, fmt.pix);
1659                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1660                 /* just in case the driver zeroed it again */
1661                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1662                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1663                         v4l_pix_format_touch(&p->fmt.pix);
1664                 return ret;
1665         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1666                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1667                         break;
1668                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1669                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1670                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1671                                           bytesperline);
1672                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1673         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1674                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1675                         break;
1676                 CLEAR_AFTER_FIELD(p, fmt.win);
1677                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1678         case V4L2_BUF_TYPE_VBI_CAPTURE:
1679                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1680                         break;
1681                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1682                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1683         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1684                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1685                         break;
1686                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1687                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1688         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1689                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1690                         break;
1691                 CLEAR_AFTER_FIELD(p, fmt.pix);
1692                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1693                 /* just in case the driver zeroed it again */
1694                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1695                 return ret;
1696         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1697                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1698                         break;
1699                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1700                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1701                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1702                                           bytesperline);
1703                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1704         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1705                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1706                         break;
1707                 CLEAR_AFTER_FIELD(p, fmt.win);
1708                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1709         case V4L2_BUF_TYPE_VBI_OUTPUT:
1710                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1711                         break;
1712                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1713                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1714         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1715                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1716                         break;
1717                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1718                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1719         case V4L2_BUF_TYPE_SDR_CAPTURE:
1720                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1721                         break;
1722                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1723                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1724         case V4L2_BUF_TYPE_SDR_OUTPUT:
1725                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1726                         break;
1727                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1728                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1729         case V4L2_BUF_TYPE_META_CAPTURE:
1730                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1731                         break;
1732                 CLEAR_AFTER_FIELD(p, fmt.meta);
1733                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1734         case V4L2_BUF_TYPE_META_OUTPUT:
1735                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1736                         break;
1737                 CLEAR_AFTER_FIELD(p, fmt.meta);
1738                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1739         }
1740         return -EINVAL;
1741 }
1742
1743 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1744                                 struct file *file, void *fh, void *arg)
1745 {
1746         struct v4l2_format *p = arg;
1747         struct video_device *vfd = video_devdata(file);
1748         int ret = check_fmt(file, p->type);
1749         unsigned int i;
1750
1751         if (ret)
1752                 return ret;
1753
1754         v4l_sanitize_format(p);
1755
1756         switch (p->type) {
1757         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1758                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1759                         break;
1760                 CLEAR_AFTER_FIELD(p, fmt.pix);
1761                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1762                 /* just in case the driver zeroed it again */
1763                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1764                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1765                         v4l_pix_format_touch(&p->fmt.pix);
1766                 return ret;
1767         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1768                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1769                         break;
1770                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1771                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1772                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1773                                           bytesperline);
1774                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1775         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1776                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1777                         break;
1778                 CLEAR_AFTER_FIELD(p, fmt.win);
1779                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1780         case V4L2_BUF_TYPE_VBI_CAPTURE:
1781                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1782                         break;
1783                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1784                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1785         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1786                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1787                         break;
1788                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1789                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1790         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1791                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1792                         break;
1793                 CLEAR_AFTER_FIELD(p, fmt.pix);
1794                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1795                 /* just in case the driver zeroed it again */
1796                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1797                 return ret;
1798         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1799                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1800                         break;
1801                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1802                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1803                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1804                                           bytesperline);
1805                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1806         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1807                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1808                         break;
1809                 CLEAR_AFTER_FIELD(p, fmt.win);
1810                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1811         case V4L2_BUF_TYPE_VBI_OUTPUT:
1812                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1813                         break;
1814                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1815                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1816         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1817                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1818                         break;
1819                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1820                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1821         case V4L2_BUF_TYPE_SDR_CAPTURE:
1822                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1823                         break;
1824                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1825                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1826         case V4L2_BUF_TYPE_SDR_OUTPUT:
1827                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1828                         break;
1829                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1830                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1831         case V4L2_BUF_TYPE_META_CAPTURE:
1832                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1833                         break;
1834                 CLEAR_AFTER_FIELD(p, fmt.meta);
1835                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1836         case V4L2_BUF_TYPE_META_OUTPUT:
1837                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1838                         break;
1839                 CLEAR_AFTER_FIELD(p, fmt.meta);
1840                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1841         }
1842         return -EINVAL;
1843 }
1844
1845 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1846                                 struct file *file, void *fh, void *arg)
1847 {
1848         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1849 }
1850
1851 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1852                                 struct file *file, void *fh, void *arg)
1853 {
1854         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1855 }
1856
1857 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1858                                 struct file *file, void *fh, void *arg)
1859 {
1860         struct video_device *vfd = video_devdata(file);
1861         struct v4l2_tuner *p = arg;
1862         int err;
1863
1864         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1865                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1866         err = ops->vidioc_g_tuner(file, fh, p);
1867         if (!err)
1868                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1869         return err;
1870 }
1871
1872 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1873                                 struct file *file, void *fh, void *arg)
1874 {
1875         struct video_device *vfd = video_devdata(file);
1876         struct v4l2_tuner *p = arg;
1877         int ret;
1878
1879         ret = v4l_enable_media_source(vfd);
1880         if (ret)
1881                 return ret;
1882         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1883                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1884         return ops->vidioc_s_tuner(file, fh, p);
1885 }
1886
1887 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1888                                 struct file *file, void *fh, void *arg)
1889 {
1890         struct video_device *vfd = video_devdata(file);
1891         struct v4l2_modulator *p = arg;
1892         int err;
1893
1894         if (vfd->vfl_type == VFL_TYPE_RADIO)
1895                 p->type = V4L2_TUNER_RADIO;
1896
1897         err = ops->vidioc_g_modulator(file, fh, p);
1898         if (!err)
1899                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1900         return err;
1901 }
1902
1903 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1904                                 struct file *file, void *fh, void *arg)
1905 {
1906         struct video_device *vfd = video_devdata(file);
1907         struct v4l2_modulator *p = arg;
1908
1909         if (vfd->vfl_type == VFL_TYPE_RADIO)
1910                 p->type = V4L2_TUNER_RADIO;
1911
1912         return ops->vidioc_s_modulator(file, fh, p);
1913 }
1914
1915 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1916                                 struct file *file, void *fh, void *arg)
1917 {
1918         struct video_device *vfd = video_devdata(file);
1919         struct v4l2_frequency *p = arg;
1920
1921         if (vfd->vfl_type == VFL_TYPE_SDR)
1922                 p->type = V4L2_TUNER_SDR;
1923         else
1924                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1925                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1926         return ops->vidioc_g_frequency(file, fh, p);
1927 }
1928
1929 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1930                                 struct file *file, void *fh, void *arg)
1931 {
1932         struct video_device *vfd = video_devdata(file);
1933         const struct v4l2_frequency *p = arg;
1934         enum v4l2_tuner_type type;
1935         int ret;
1936
1937         ret = v4l_enable_media_source(vfd);
1938         if (ret)
1939                 return ret;
1940         if (vfd->vfl_type == VFL_TYPE_SDR) {
1941                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1942                         return -EINVAL;
1943         } else {
1944                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1945                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1946                 if (type != p->type)
1947                         return -EINVAL;
1948         }
1949         return ops->vidioc_s_frequency(file, fh, p);
1950 }
1951
1952 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1953                                 struct file *file, void *fh, void *arg)
1954 {
1955         struct video_device *vfd = video_devdata(file);
1956         struct v4l2_standard *p = arg;
1957
1958         return v4l_video_std_enumstd(p, vfd->tvnorms);
1959 }
1960
1961 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1962                                 struct file *file, void *fh, void *arg)
1963 {
1964         struct video_device *vfd = video_devdata(file);
1965         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1966         int ret;
1967
1968         ret = v4l_enable_media_source(vfd);
1969         if (ret)
1970                 return ret;
1971         norm = id & vfd->tvnorms;
1972         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1973                 return -EINVAL;
1974
1975         /* Calls the specific handler */
1976         return ops->vidioc_s_std(file, fh, norm);
1977 }
1978
1979 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1980                                 struct file *file, void *fh, void *arg)
1981 {
1982         struct video_device *vfd = video_devdata(file);
1983         v4l2_std_id *p = arg;
1984         int ret;
1985
1986         ret = v4l_enable_media_source(vfd);
1987         if (ret)
1988                 return ret;
1989         /*
1990          * If no signal is detected, then the driver should return
1991          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1992          * any standards that do not apply removed.
1993          *
1994          * This means that tuners, audio and video decoders can join
1995          * their efforts to improve the standards detection.
1996          */
1997         *p = vfd->tvnorms;
1998         return ops->vidioc_querystd(file, fh, arg);
1999 }
2000
2001 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2002                                 struct file *file, void *fh, void *arg)
2003 {
2004         struct video_device *vfd = video_devdata(file);
2005         struct v4l2_hw_freq_seek *p = arg;
2006         enum v4l2_tuner_type type;
2007         int ret;
2008
2009         ret = v4l_enable_media_source(vfd);
2010         if (ret)
2011                 return ret;
2012         /* s_hw_freq_seek is not supported for SDR for now */
2013         if (vfd->vfl_type == VFL_TYPE_SDR)
2014                 return -EINVAL;
2015
2016         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2017                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2018         if (p->type != type)
2019                 return -EINVAL;
2020         return ops->vidioc_s_hw_freq_seek(file, fh, p);
2021 }
2022
2023 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2024                                 struct file *file, void *fh, void *arg)
2025 {
2026         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2027 }
2028
2029 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2030                                 struct file *file, void *fh, void *arg)
2031 {
2032         struct v4l2_requestbuffers *p = arg;
2033         int ret = check_fmt(file, p->type);
2034
2035         if (ret)
2036                 return ret;
2037
2038         CLEAR_AFTER_FIELD(p, flags);
2039
2040         return ops->vidioc_reqbufs(file, fh, p);
2041 }
2042
2043 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2044                                 struct file *file, void *fh, void *arg)
2045 {
2046         struct v4l2_buffer *p = arg;
2047         int ret = check_fmt(file, p->type);
2048
2049         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2050 }
2051
2052 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2053                                 struct file *file, void *fh, void *arg)
2054 {
2055         struct v4l2_buffer *p = arg;
2056         int ret = check_fmt(file, p->type);
2057
2058         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2059 }
2060
2061 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2062                                 struct file *file, void *fh, void *arg)
2063 {
2064         struct v4l2_buffer *p = arg;
2065         int ret = check_fmt(file, p->type);
2066
2067         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2068 }
2069
2070 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2071                                 struct file *file, void *fh, void *arg)
2072 {
2073         struct v4l2_create_buffers *create = arg;
2074         int ret = check_fmt(file, create->format.type);
2075
2076         if (ret)
2077                 return ret;
2078
2079         CLEAR_AFTER_FIELD(create, flags);
2080
2081         v4l_sanitize_format(&create->format);
2082
2083         ret = ops->vidioc_create_bufs(file, fh, create);
2084
2085         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2086             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2087                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2088
2089         return ret;
2090 }
2091
2092 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2093                                 struct file *file, void *fh, void *arg)
2094 {
2095         struct v4l2_buffer *b = arg;
2096         int ret = check_fmt(file, b->type);
2097
2098         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2099 }
2100
2101 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2102                                 struct file *file, void *fh, void *arg)
2103 {
2104         struct video_device *vfd = video_devdata(file);
2105         struct v4l2_streamparm *p = arg;
2106         v4l2_std_id std;
2107         int ret = check_fmt(file, p->type);
2108
2109         if (ret)
2110                 return ret;
2111         if (ops->vidioc_g_parm)
2112                 return ops->vidioc_g_parm(file, fh, p);
2113         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2114             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2115                 return -EINVAL;
2116         if (vfd->device_caps & V4L2_CAP_READWRITE)
2117                 p->parm.capture.readbuffers = 2;
2118         ret = ops->vidioc_g_std(file, fh, &std);
2119         if (ret == 0)
2120                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2121         return ret;
2122 }
2123
2124 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2125                                 struct file *file, void *fh, void *arg)
2126 {
2127         struct v4l2_streamparm *p = arg;
2128         int ret = check_fmt(file, p->type);
2129
2130         if (ret)
2131                 return ret;
2132
2133         /* Note: extendedmode is never used in drivers */
2134         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2135                 memset(p->parm.output.reserved, 0,
2136                        sizeof(p->parm.output.reserved));
2137                 p->parm.output.extendedmode = 0;
2138                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2139         } else {
2140                 memset(p->parm.capture.reserved, 0,
2141                        sizeof(p->parm.capture.reserved));
2142                 p->parm.capture.extendedmode = 0;
2143                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2144         }
2145         return ops->vidioc_s_parm(file, fh, p);
2146 }
2147
2148 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2149                                 struct file *file, void *fh, void *arg)
2150 {
2151         struct video_device *vfd = video_devdata(file);
2152         struct v4l2_queryctrl *p = arg;
2153         struct v4l2_fh *vfh =
2154                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2155
2156         if (vfh && vfh->ctrl_handler)
2157                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2158         if (vfd->ctrl_handler)
2159                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2160         if (ops->vidioc_queryctrl)
2161                 return ops->vidioc_queryctrl(file, fh, p);
2162         return -ENOTTY;
2163 }
2164
2165 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2166                                 struct file *file, void *fh, void *arg)
2167 {
2168         struct video_device *vfd = video_devdata(file);
2169         struct v4l2_query_ext_ctrl *p = arg;
2170         struct v4l2_fh *vfh =
2171                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2172
2173         if (vfh && vfh->ctrl_handler)
2174                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2175         if (vfd->ctrl_handler)
2176                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2177         if (ops->vidioc_query_ext_ctrl)
2178                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2179         return -ENOTTY;
2180 }
2181
2182 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2183                                 struct file *file, void *fh, void *arg)
2184 {
2185         struct video_device *vfd = video_devdata(file);
2186         struct v4l2_querymenu *p = arg;
2187         struct v4l2_fh *vfh =
2188                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2189
2190         if (vfh && vfh->ctrl_handler)
2191                 return v4l2_querymenu(vfh->ctrl_handler, p);
2192         if (vfd->ctrl_handler)
2193                 return v4l2_querymenu(vfd->ctrl_handler, p);
2194         if (ops->vidioc_querymenu)
2195                 return ops->vidioc_querymenu(file, fh, p);
2196         return -ENOTTY;
2197 }
2198
2199 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2200                                 struct file *file, void *fh, void *arg)
2201 {
2202         struct video_device *vfd = video_devdata(file);
2203         struct v4l2_control *p = arg;
2204         struct v4l2_fh *vfh =
2205                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2206         struct v4l2_ext_controls ctrls;
2207         struct v4l2_ext_control ctrl;
2208
2209         if (vfh && vfh->ctrl_handler)
2210                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2211         if (vfd->ctrl_handler)
2212                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2213         if (ops->vidioc_g_ctrl)
2214                 return ops->vidioc_g_ctrl(file, fh, p);
2215         if (ops->vidioc_g_ext_ctrls == NULL)
2216                 return -ENOTTY;
2217
2218         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2219         ctrls.count = 1;
2220         ctrls.controls = &ctrl;
2221         ctrl.id = p->id;
2222         ctrl.value = p->value;
2223         if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
2224                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2225
2226                 if (ret == 0)
2227                         p->value = ctrl.value;
2228                 return ret;
2229         }
2230         return -EINVAL;
2231 }
2232
2233 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2234                                 struct file *file, void *fh, void *arg)
2235 {
2236         struct video_device *vfd = video_devdata(file);
2237         struct v4l2_control *p = arg;
2238         struct v4l2_fh *vfh =
2239                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2240         struct v4l2_ext_controls ctrls;
2241         struct v4l2_ext_control ctrl;
2242         int ret;
2243
2244         if (vfh && vfh->ctrl_handler)
2245                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2246         if (vfd->ctrl_handler)
2247                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2248         if (ops->vidioc_s_ctrl)
2249                 return ops->vidioc_s_ctrl(file, fh, p);
2250         if (ops->vidioc_s_ext_ctrls == NULL)
2251                 return -ENOTTY;
2252
2253         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2254         ctrls.count = 1;
2255         ctrls.controls = &ctrl;
2256         ctrl.id = p->id;
2257         ctrl.value = p->value;
2258         if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
2259                 return -EINVAL;
2260         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2261         p->value = ctrl.value;
2262         return ret;
2263 }
2264
2265 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2266                                 struct file *file, void *fh, void *arg)
2267 {
2268         struct video_device *vfd = video_devdata(file);
2269         struct v4l2_ext_controls *p = arg;
2270         struct v4l2_fh *vfh =
2271                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2272
2273         p->error_idx = p->count;
2274         if (vfh && vfh->ctrl_handler)
2275                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2276                                         vfd, vfd->v4l2_dev->mdev, p);
2277         if (vfd->ctrl_handler)
2278                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2279                                         vfd, vfd->v4l2_dev->mdev, p);
2280         if (ops->vidioc_g_ext_ctrls == NULL)
2281                 return -ENOTTY;
2282         return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
2283                                 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2284 }
2285
2286 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2287                                 struct file *file, void *fh, void *arg)
2288 {
2289         struct video_device *vfd = video_devdata(file);
2290         struct v4l2_ext_controls *p = arg;
2291         struct v4l2_fh *vfh =
2292                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2293
2294         p->error_idx = p->count;
2295         if (vfh && vfh->ctrl_handler)
2296                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2297                                         vfd, vfd->v4l2_dev->mdev, p);
2298         if (vfd->ctrl_handler)
2299                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2300                                         vfd, vfd->v4l2_dev->mdev, p);
2301         if (ops->vidioc_s_ext_ctrls == NULL)
2302                 return -ENOTTY;
2303         return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
2304                                 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2305 }
2306
2307 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2308                                 struct file *file, void *fh, void *arg)
2309 {
2310         struct video_device *vfd = video_devdata(file);
2311         struct v4l2_ext_controls *p = arg;
2312         struct v4l2_fh *vfh =
2313                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2314
2315         p->error_idx = p->count;
2316         if (vfh && vfh->ctrl_handler)
2317                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2318                                           vfd, vfd->v4l2_dev->mdev, p);
2319         if (vfd->ctrl_handler)
2320                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2321                                           vfd, vfd->v4l2_dev->mdev, p);
2322         if (ops->vidioc_try_ext_ctrls == NULL)
2323                 return -ENOTTY;
2324         return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
2325                         ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2326 }
2327
2328 /*
2329  * The selection API specified originally that the _MPLANE buffer types
2330  * shouldn't be used. The reasons for this are lost in the mists of time
2331  * (or just really crappy memories). Regardless, this is really annoying
2332  * for userspace. So to keep things simple we map _MPLANE buffer types
2333  * to their 'regular' counterparts before calling the driver. And we
2334  * restore it afterwards. This way applications can use either buffer
2335  * type and drivers don't need to check for both.
2336  */
2337 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2338                            struct file *file, void *fh, void *arg)
2339 {
2340         struct v4l2_selection *p = arg;
2341         u32 old_type = p->type;
2342         int ret;
2343
2344         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2345                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2346         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2347                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2348         ret = ops->vidioc_g_selection(file, fh, p);
2349         p->type = old_type;
2350         return ret;
2351 }
2352
2353 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2354                            struct file *file, void *fh, void *arg)
2355 {
2356         struct v4l2_selection *p = arg;
2357         u32 old_type = p->type;
2358         int ret;
2359
2360         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2361                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2362         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2363                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2364         ret = ops->vidioc_s_selection(file, fh, p);
2365         p->type = old_type;
2366         return ret;
2367 }
2368
2369 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2370                                 struct file *file, void *fh, void *arg)
2371 {
2372         struct video_device *vfd = video_devdata(file);
2373         struct v4l2_crop *p = arg;
2374         struct v4l2_selection s = {
2375                 .type = p->type,
2376         };
2377         int ret;
2378
2379         /* simulate capture crop using selection api */
2380
2381         /* crop means compose for output devices */
2382         if (V4L2_TYPE_IS_OUTPUT(p->type))
2383                 s.target = V4L2_SEL_TGT_COMPOSE;
2384         else
2385                 s.target = V4L2_SEL_TGT_CROP;
2386
2387         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2388                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2389                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2390
2391         ret = v4l_g_selection(ops, file, fh, &s);
2392
2393         /* copying results to old structure on success */
2394         if (!ret)
2395                 p->c = s.r;
2396         return ret;
2397 }
2398
2399 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2400                                 struct file *file, void *fh, void *arg)
2401 {
2402         struct video_device *vfd = video_devdata(file);
2403         struct v4l2_crop *p = arg;
2404         struct v4l2_selection s = {
2405                 .type = p->type,
2406                 .r = p->c,
2407         };
2408
2409         /* simulate capture crop using selection api */
2410
2411         /* crop means compose for output devices */
2412         if (V4L2_TYPE_IS_OUTPUT(p->type))
2413                 s.target = V4L2_SEL_TGT_COMPOSE;
2414         else
2415                 s.target = V4L2_SEL_TGT_CROP;
2416
2417         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2418                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2419                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2420
2421         return v4l_s_selection(ops, file, fh, &s);
2422 }
2423
2424 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2425                                 struct file *file, void *fh, void *arg)
2426 {
2427         struct video_device *vfd = video_devdata(file);
2428         struct v4l2_cropcap *p = arg;
2429         struct v4l2_selection s = { .type = p->type };
2430         int ret = 0;
2431
2432         /* setting trivial pixelaspect */
2433         p->pixelaspect.numerator = 1;
2434         p->pixelaspect.denominator = 1;
2435
2436         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2437                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2438         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2439                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2440
2441         /*
2442          * The determine_valid_ioctls() call already should ensure
2443          * that this can never happen, but just in case...
2444          */
2445         if (WARN_ON(!ops->vidioc_g_selection))
2446                 return -ENOTTY;
2447
2448         if (ops->vidioc_g_pixelaspect)
2449                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2450                                                 &p->pixelaspect);
2451
2452         /*
2453          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2454          * square pixel aspect ratio in that case.
2455          */
2456         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2457                 return ret;
2458
2459         /* Use g_selection() to fill in the bounds and defrect rectangles */
2460
2461         /* obtaining bounds */
2462         if (V4L2_TYPE_IS_OUTPUT(p->type))
2463                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2464         else
2465                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2466
2467         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2468                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2469                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2470
2471         ret = v4l_g_selection(ops, file, fh, &s);
2472         if (ret)
2473                 return ret;
2474         p->bounds = s.r;
2475
2476         /* obtaining defrect */
2477         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2478                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2479         else
2480                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2481
2482         ret = v4l_g_selection(ops, file, fh, &s);
2483         if (ret)
2484                 return ret;
2485         p->defrect = s.r;
2486
2487         return 0;
2488 }
2489
2490 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2491                                 struct file *file, void *fh, void *arg)
2492 {
2493         struct video_device *vfd = video_devdata(file);
2494         int ret;
2495
2496         if (vfd->v4l2_dev)
2497                 pr_info("%s: =================  START STATUS  =================\n",
2498                         vfd->v4l2_dev->name);
2499         ret = ops->vidioc_log_status(file, fh);
2500         if (vfd->v4l2_dev)
2501                 pr_info("%s: ==================  END STATUS  ==================\n",
2502                         vfd->v4l2_dev->name);
2503         return ret;
2504 }
2505
2506 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2507                                 struct file *file, void *fh, void *arg)
2508 {
2509 #ifdef CONFIG_VIDEO_ADV_DEBUG
2510         struct v4l2_dbg_register *p = arg;
2511         struct video_device *vfd = video_devdata(file);
2512         struct v4l2_subdev *sd;
2513         int idx = 0;
2514
2515         if (!capable(CAP_SYS_ADMIN))
2516                 return -EPERM;
2517         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2518                 if (vfd->v4l2_dev == NULL)
2519                         return -EINVAL;
2520                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2521                         if (p->match.addr == idx++)
2522                                 return v4l2_subdev_call(sd, core, g_register, p);
2523                 return -EINVAL;
2524         }
2525         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2526             (ops->vidioc_g_chip_info || p->match.addr == 0))
2527                 return ops->vidioc_g_register(file, fh, p);
2528         return -EINVAL;
2529 #else
2530         return -ENOTTY;
2531 #endif
2532 }
2533
2534 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2535                                 struct file *file, void *fh, void *arg)
2536 {
2537 #ifdef CONFIG_VIDEO_ADV_DEBUG
2538         const struct v4l2_dbg_register *p = arg;
2539         struct video_device *vfd = video_devdata(file);
2540         struct v4l2_subdev *sd;
2541         int idx = 0;
2542
2543         if (!capable(CAP_SYS_ADMIN))
2544                 return -EPERM;
2545         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2546                 if (vfd->v4l2_dev == NULL)
2547                         return -EINVAL;
2548                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2549                         if (p->match.addr == idx++)
2550                                 return v4l2_subdev_call(sd, core, s_register, p);
2551                 return -EINVAL;
2552         }
2553         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2554             (ops->vidioc_g_chip_info || p->match.addr == 0))
2555                 return ops->vidioc_s_register(file, fh, p);
2556         return -EINVAL;
2557 #else
2558         return -ENOTTY;
2559 #endif
2560 }
2561
2562 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2563                                 struct file *file, void *fh, void *arg)
2564 {
2565 #ifdef CONFIG_VIDEO_ADV_DEBUG
2566         struct video_device *vfd = video_devdata(file);
2567         struct v4l2_dbg_chip_info *p = arg;
2568         struct v4l2_subdev *sd;
2569         int idx = 0;
2570
2571         switch (p->match.type) {
2572         case V4L2_CHIP_MATCH_BRIDGE:
2573                 if (ops->vidioc_s_register)
2574                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2575                 if (ops->vidioc_g_register)
2576                         p->flags |= V4L2_CHIP_FL_READABLE;
2577                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2578                 if (ops->vidioc_g_chip_info)
2579                         return ops->vidioc_g_chip_info(file, fh, arg);
2580                 if (p->match.addr)
2581                         return -EINVAL;
2582                 return 0;
2583
2584         case V4L2_CHIP_MATCH_SUBDEV:
2585                 if (vfd->v4l2_dev == NULL)
2586                         break;
2587                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2588                         if (p->match.addr != idx++)
2589                                 continue;
2590                         if (sd->ops->core && sd->ops->core->s_register)
2591                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2592                         if (sd->ops->core && sd->ops->core->g_register)
2593                                 p->flags |= V4L2_CHIP_FL_READABLE;
2594                         strscpy(p->name, sd->name, sizeof(p->name));
2595                         return 0;
2596                 }
2597                 break;
2598         }
2599         return -EINVAL;
2600 #else
2601         return -ENOTTY;
2602 #endif
2603 }
2604
2605 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2606                                 struct file *file, void *fh, void *arg)
2607 {
2608         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2609 }
2610
2611 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2612                                 struct file *file, void *fh, void *arg)
2613 {
2614         return ops->vidioc_subscribe_event(fh, arg);
2615 }
2616
2617 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2618                                 struct file *file, void *fh, void *arg)
2619 {
2620         return ops->vidioc_unsubscribe_event(fh, arg);
2621 }
2622
2623 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2624                                 struct file *file, void *fh, void *arg)
2625 {
2626         struct v4l2_sliced_vbi_cap *p = arg;
2627         int ret = check_fmt(file, p->type);
2628
2629         if (ret)
2630                 return ret;
2631
2632         /* Clear up to type, everything after type is zeroed already */
2633         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2634
2635         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2636 }
2637
2638 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2639                                 struct file *file, void *fh, void *arg)
2640 {
2641         struct video_device *vfd = video_devdata(file);
2642         struct v4l2_frequency_band *p = arg;
2643         enum v4l2_tuner_type type;
2644         int err;
2645
2646         if (vfd->vfl_type == VFL_TYPE_SDR) {
2647                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2648                         return -EINVAL;
2649                 type = p->type;
2650         } else {
2651                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2652                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2653                 if (type != p->type)
2654                         return -EINVAL;
2655         }
2656         if (ops->vidioc_enum_freq_bands) {
2657                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2658                 if (err != -ENOTTY)
2659                         return err;
2660         }
2661         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2662                 struct v4l2_tuner t = {
2663                         .index = p->tuner,
2664                         .type = type,
2665                 };
2666
2667                 if (p->index)
2668                         return -EINVAL;
2669                 err = ops->vidioc_g_tuner(file, fh, &t);
2670                 if (err)
2671                         return err;
2672                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2673                 p->rangelow = t.rangelow;
2674                 p->rangehigh = t.rangehigh;
2675                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2676                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2677                 return 0;
2678         }
2679         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2680                 struct v4l2_modulator m = {
2681                         .index = p->tuner,
2682                 };
2683
2684                 if (type != V4L2_TUNER_RADIO)
2685                         return -EINVAL;
2686                 if (p->index)
2687                         return -EINVAL;
2688                 err = ops->vidioc_g_modulator(file, fh, &m);
2689                 if (err)
2690                         return err;
2691                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2692                 p->rangelow = m.rangelow;
2693                 p->rangehigh = m.rangehigh;
2694                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2695                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2696                 return 0;
2697         }
2698         return -ENOTTY;
2699 }
2700
2701 struct v4l2_ioctl_info {
2702         unsigned int ioctl;
2703         u32 flags;
2704         const char * const name;
2705         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2706                     void *fh, void *p);
2707         void (*debug)(const void *arg, bool write_only);
2708 };
2709
2710 /* This control needs a priority check */
2711 #define INFO_FL_PRIO            (1 << 0)
2712 /* This control can be valid if the filehandle passes a control handler. */
2713 #define INFO_FL_CTRL            (1 << 1)
2714 /* Queuing ioctl */
2715 #define INFO_FL_QUEUE           (1 << 2)
2716 /* Always copy back result, even on error */
2717 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2718 /* Zero struct from after the field to the end */
2719 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2720         ((offsetof(struct v4l2_struct, field) +                 \
2721           sizeof_field(struct v4l2_struct, field)) << 16)
2722 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2723
2724 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2725         static int v4l_stub_ ## _vidioc(                        \
2726                         const struct v4l2_ioctl_ops *ops,       \
2727                         struct file *file, void *fh, void *p)   \
2728         {                                                       \
2729                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2730         }
2731
2732 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2733         [_IOC_NR(_ioctl)] = {                                   \
2734                 .ioctl = _ioctl,                                \
2735                 .flags = _flags,                                \
2736                 .name = #_ioctl,                                \
2737                 .func = _func,                                  \
2738                 .debug = _debug,                                \
2739         }
2740
2741 DEFINE_V4L_STUB_FUNC(g_fbuf)
2742 DEFINE_V4L_STUB_FUNC(s_fbuf)
2743 DEFINE_V4L_STUB_FUNC(expbuf)
2744 DEFINE_V4L_STUB_FUNC(g_std)
2745 DEFINE_V4L_STUB_FUNC(g_audio)
2746 DEFINE_V4L_STUB_FUNC(s_audio)
2747 DEFINE_V4L_STUB_FUNC(g_edid)
2748 DEFINE_V4L_STUB_FUNC(s_edid)
2749 DEFINE_V4L_STUB_FUNC(g_audout)
2750 DEFINE_V4L_STUB_FUNC(s_audout)
2751 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2752 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2753 DEFINE_V4L_STUB_FUNC(enumaudio)
2754 DEFINE_V4L_STUB_FUNC(enumaudout)
2755 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2756 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2757 DEFINE_V4L_STUB_FUNC(g_enc_index)
2758 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2759 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2760 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2761 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2762 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2763 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2764 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2765 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2766 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2767
2768 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2769         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2770         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2771         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2772         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2773         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2774         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2775         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2776         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2777         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2778         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2779         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2780         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2781         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2782         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2783         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2784         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2785         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2786         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2787         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2788         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2789         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2790         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2791         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2792         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2793         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2794         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2795         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2796         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2797         IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2798         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2799         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2800         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2801         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2802         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2803         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2804         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2805         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2806         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2807         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2808         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2809         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2810         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2811         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2812         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2813         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2814         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2815         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2816         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2817         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2818         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2819         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2820         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2821         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2822         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2823         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)),
2824         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2825         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2826         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2827         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2828         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2829         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2830         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2831         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2832         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2833         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2834         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2835         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2836         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2837         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2838         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)),
2839         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2840         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2841         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2842         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2843         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2844         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2845         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2846         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2847         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2848         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2849         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)),
2850         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)),
2851 };
2852 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2853
2854 static bool v4l2_is_known_ioctl(unsigned int cmd)
2855 {
2856         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2857                 return false;
2858         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2859 }
2860
2861 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2862                                          struct v4l2_fh *vfh, unsigned int cmd,
2863                                          void *arg)
2864 {
2865         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2866                 return vdev->lock;
2867         if (vfh && vfh->m2m_ctx &&
2868             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2869                 if (vfh->m2m_ctx->q_lock)
2870                         return vfh->m2m_ctx->q_lock;
2871         }
2872         if (vdev->queue && vdev->queue->lock &&
2873                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2874                 return vdev->queue->lock;
2875         return vdev->lock;
2876 }
2877
2878 /* Common ioctl debug function. This function can be used by
2879    external ioctl messages as well as internal V4L ioctl */
2880 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2881 {
2882         const char *dir, *type;
2883
2884         if (prefix)
2885                 printk(KERN_DEBUG "%s: ", prefix);
2886
2887         switch (_IOC_TYPE(cmd)) {
2888         case 'd':
2889                 type = "v4l2_int";
2890                 break;
2891         case 'V':
2892                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2893                         type = "v4l2";
2894                         break;
2895                 }
2896                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2897                 return;
2898         default:
2899                 type = "unknown";
2900                 break;
2901         }
2902
2903         switch (_IOC_DIR(cmd)) {
2904         case _IOC_NONE:              dir = "--"; break;
2905         case _IOC_READ:              dir = "r-"; break;
2906         case _IOC_WRITE:             dir = "-w"; break;
2907         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2908         default:                     dir = "*ERR*"; break;
2909         }
2910         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2911                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2912 }
2913 EXPORT_SYMBOL(v4l_printk_ioctl);
2914
2915 static long __video_do_ioctl(struct file *file,
2916                 unsigned int cmd, void *arg)
2917 {
2918         struct video_device *vfd = video_devdata(file);
2919         struct mutex *req_queue_lock = NULL;
2920         struct mutex *lock; /* ioctl serialization mutex */
2921         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2922         bool write_only = false;
2923         struct v4l2_ioctl_info default_info;
2924         const struct v4l2_ioctl_info *info;
2925         void *fh = file->private_data;
2926         struct v4l2_fh *vfh = NULL;
2927         int dev_debug = vfd->dev_debug;
2928         long ret = -ENOTTY;
2929
2930         if (ops == NULL) {
2931                 pr_warn("%s: has no ioctl_ops.\n",
2932                                 video_device_node_name(vfd));
2933                 return ret;
2934         }
2935
2936         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2937                 vfh = file->private_data;
2938
2939         /*
2940          * We need to serialize streamon/off with queueing new requests.
2941          * These ioctls may trigger the cancellation of a streaming
2942          * operation, and that should not be mixed with queueing a new
2943          * request at the same time.
2944          */
2945         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2946             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2947                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2948
2949                 if (mutex_lock_interruptible(req_queue_lock))
2950                         return -ERESTARTSYS;
2951         }
2952
2953         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2954
2955         if (lock && mutex_lock_interruptible(lock)) {
2956                 if (req_queue_lock)
2957                         mutex_unlock(req_queue_lock);
2958                 return -ERESTARTSYS;
2959         }
2960
2961         if (!video_is_registered(vfd)) {
2962                 ret = -ENODEV;
2963                 goto unlock;
2964         }
2965
2966         if (v4l2_is_known_ioctl(cmd)) {
2967                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2968
2969                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2970                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2971                         goto done;
2972
2973                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2974                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2975                         if (ret)
2976                                 goto done;
2977                 }
2978         } else {
2979                 default_info.ioctl = cmd;
2980                 default_info.flags = 0;
2981                 default_info.debug = v4l_print_default;
2982                 info = &default_info;
2983         }
2984
2985         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2986         if (info != &default_info) {
2987                 ret = info->func(ops, file, fh, arg);
2988         } else if (!ops->vidioc_default) {
2989                 ret = -ENOTTY;
2990         } else {
2991                 ret = ops->vidioc_default(file, fh,
2992                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2993                         cmd, arg);
2994         }
2995
2996 done:
2997         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2998                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2999                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3000                         goto unlock;
3001
3002                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3003                 if (ret < 0)
3004                         pr_cont(": error %ld", ret);
3005                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3006                         pr_cont("\n");
3007                 else if (_IOC_DIR(cmd) == _IOC_NONE)
3008                         info->debug(arg, write_only);
3009                 else {
3010                         pr_cont(": ");
3011                         info->debug(arg, write_only);
3012                 }
3013         }
3014
3015 unlock:
3016         if (lock)
3017                 mutex_unlock(lock);
3018         if (req_queue_lock)
3019                 mutex_unlock(req_queue_lock);
3020         return ret;
3021 }
3022
3023 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3024                             void __user **user_ptr, void ***kernel_ptr)
3025 {
3026         int ret = 0;
3027
3028         switch (cmd) {
3029         case VIDIOC_PREPARE_BUF:
3030         case VIDIOC_QUERYBUF:
3031         case VIDIOC_QBUF:
3032         case VIDIOC_DQBUF: {
3033                 struct v4l2_buffer *buf = parg;
3034
3035                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3036                         if (buf->length > VIDEO_MAX_PLANES) {
3037                                 ret = -EINVAL;
3038                                 break;
3039                         }
3040                         *user_ptr = (void __user *)buf->m.planes;
3041                         *kernel_ptr = (void **)&buf->m.planes;
3042                         *array_size = sizeof(struct v4l2_plane) * buf->length;
3043                         ret = 1;
3044                 }
3045                 break;
3046         }
3047
3048         case VIDIOC_G_EDID:
3049         case VIDIOC_S_EDID: {
3050                 struct v4l2_edid *edid = parg;
3051
3052                 if (edid->blocks) {
3053                         if (edid->blocks > 256) {
3054                                 ret = -EINVAL;
3055                                 break;
3056                         }
3057                         *user_ptr = (void __user *)edid->edid;
3058                         *kernel_ptr = (void **)&edid->edid;
3059                         *array_size = edid->blocks * 128;
3060                         ret = 1;
3061                 }
3062                 break;
3063         }
3064
3065         case VIDIOC_S_EXT_CTRLS:
3066         case VIDIOC_G_EXT_CTRLS:
3067         case VIDIOC_TRY_EXT_CTRLS: {
3068                 struct v4l2_ext_controls *ctrls = parg;
3069
3070                 if (ctrls->count != 0) {
3071                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3072                                 ret = -EINVAL;
3073                                 break;
3074                         }
3075                         *user_ptr = (void __user *)ctrls->controls;
3076                         *kernel_ptr = (void **)&ctrls->controls;
3077                         *array_size = sizeof(struct v4l2_ext_control)
3078                                     * ctrls->count;
3079                         ret = 1;
3080                 }
3081                 break;
3082         }
3083         case VIDIOC_G_FMT:
3084         case VIDIOC_S_FMT:
3085         case VIDIOC_TRY_FMT: {
3086                 struct v4l2_format *fmt = parg;
3087
3088                 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
3089                     fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
3090                         break;
3091                 if (fmt->fmt.win.clipcount > 2048)
3092                         return -EINVAL;
3093                 if (!fmt->fmt.win.clipcount)
3094                         break;
3095
3096                 *user_ptr = (void __user *)fmt->fmt.win.clips;
3097                 *kernel_ptr = (void **)&fmt->fmt.win.clips;
3098                 *array_size = sizeof(struct v4l2_clip)
3099                                 * fmt->fmt.win.clipcount;
3100
3101                 ret = 1;
3102                 break;
3103         }
3104         }
3105
3106         return ret;
3107 }
3108
3109 static unsigned int video_translate_cmd(unsigned int cmd)
3110 {
3111 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3112         switch (cmd) {
3113         case VIDIOC_DQEVENT_TIME32:
3114                 return VIDIOC_DQEVENT;
3115         case VIDIOC_QUERYBUF_TIME32:
3116                 return VIDIOC_QUERYBUF;
3117         case VIDIOC_QBUF_TIME32:
3118                 return VIDIOC_QBUF;
3119         case VIDIOC_DQBUF_TIME32:
3120                 return VIDIOC_DQBUF;
3121         case VIDIOC_PREPARE_BUF_TIME32:
3122                 return VIDIOC_PREPARE_BUF;
3123         }
3124 #endif
3125         if (in_compat_syscall())
3126                 return v4l2_compat_translate_cmd(cmd);
3127
3128         return cmd;
3129 }
3130
3131 static int video_get_user(void __user *arg, void *parg,
3132                           unsigned int real_cmd, unsigned int cmd,
3133                           bool *always_copy)
3134 {
3135         unsigned int n = _IOC_SIZE(real_cmd);
3136         int err = 0;
3137
3138         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3139                 /* read-only ioctl */
3140                 memset(parg, 0, n);
3141                 return 0;
3142         }
3143
3144         /*
3145          * In some cases, only a few fields are used as input,
3146          * i.e. when the app sets "index" and then the driver
3147          * fills in the rest of the structure for the thing
3148          * with that index.  We only need to copy up the first
3149          * non-input field.
3150          */
3151         if (v4l2_is_known_ioctl(real_cmd)) {
3152                 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3153
3154                 if (flags & INFO_FL_CLEAR_MASK)
3155                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3156                 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3157         }
3158
3159         if (cmd == real_cmd) {
3160                 if (copy_from_user(parg, (void __user *)arg, n))
3161                         err = -EFAULT;
3162         } else if (in_compat_syscall()) {
3163                 memset(parg, 0, n);
3164                 err = v4l2_compat_get_user(arg, parg, cmd);
3165         } else {
3166                 memset(parg, 0, n);
3167 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3168                 switch (cmd) {
3169                 case VIDIOC_QUERYBUF_TIME32:
3170                 case VIDIOC_QBUF_TIME32:
3171                 case VIDIOC_DQBUF_TIME32:
3172                 case VIDIOC_PREPARE_BUF_TIME32: {
3173                         struct v4l2_buffer_time32 vb32;
3174                         struct v4l2_buffer *vb = parg;
3175
3176                         if (copy_from_user(&vb32, arg, sizeof(vb32)))
3177                                 return -EFAULT;
3178
3179                         *vb = (struct v4l2_buffer) {
3180                                 .index          = vb32.index,
3181                                 .type           = vb32.type,
3182                                 .bytesused      = vb32.bytesused,
3183                                 .flags          = vb32.flags,
3184                                 .field          = vb32.field,
3185                                 .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3186                                 .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3187                                 .timecode       = vb32.timecode,
3188                                 .sequence       = vb32.sequence,
3189                                 .memory         = vb32.memory,
3190                                 .m.userptr      = vb32.m.userptr,
3191                                 .length         = vb32.length,
3192                                 .request_fd     = vb32.request_fd,
3193                         };
3194                         break;
3195                 }
3196                 }
3197 #endif
3198         }
3199
3200         /* zero out anything we don't copy from userspace */
3201         if (!err && n < _IOC_SIZE(real_cmd))
3202                 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3203         return err;
3204 }
3205
3206 static int video_put_user(void __user *arg, void *parg,
3207                           unsigned int real_cmd, unsigned int cmd)
3208 {
3209         if (!(_IOC_DIR(cmd) & _IOC_READ))
3210                 return 0;
3211
3212         if (cmd == real_cmd) {
3213                 /*  Copy results into user buffer  */
3214                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3215                         return -EFAULT;
3216                 return 0;
3217         }
3218
3219         if (in_compat_syscall())
3220                 return v4l2_compat_put_user(arg, parg, cmd);
3221
3222 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3223         switch (cmd) {
3224         case VIDIOC_DQEVENT_TIME32: {
3225                 struct v4l2_event *ev = parg;
3226                 struct v4l2_event_time32 ev32;
3227
3228                 memset(&ev32, 0, sizeof(ev32));
3229
3230                 ev32.type       = ev->type;
3231                 ev32.pending    = ev->pending;
3232                 ev32.sequence   = ev->sequence;
3233                 ev32.timestamp.tv_sec   = ev->timestamp.tv_sec;
3234                 ev32.timestamp.tv_nsec  = ev->timestamp.tv_nsec;
3235                 ev32.id         = ev->id;
3236
3237                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3238                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3239
3240                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3241                         return -EFAULT;
3242                 break;
3243         }
3244         case VIDIOC_QUERYBUF_TIME32:
3245         case VIDIOC_QBUF_TIME32:
3246         case VIDIOC_DQBUF_TIME32:
3247         case VIDIOC_PREPARE_BUF_TIME32: {
3248                 struct v4l2_buffer *vb = parg;
3249                 struct v4l2_buffer_time32 vb32;
3250
3251                 memset(&vb32, 0, sizeof(vb32));
3252
3253                 vb32.index      = vb->index;
3254                 vb32.type       = vb->type;
3255                 vb32.bytesused  = vb->bytesused;
3256                 vb32.flags      = vb->flags;
3257                 vb32.field      = vb->field;
3258                 vb32.timestamp.tv_sec   = vb->timestamp.tv_sec;
3259                 vb32.timestamp.tv_usec  = vb->timestamp.tv_usec;
3260                 vb32.timecode   = vb->timecode;
3261                 vb32.sequence   = vb->sequence;
3262                 vb32.memory     = vb->memory;
3263                 vb32.m.userptr  = vb->m.userptr;
3264                 vb32.length     = vb->length;
3265                 vb32.request_fd = vb->request_fd;
3266
3267                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3268                         return -EFAULT;
3269                 break;
3270         }
3271         }
3272 #endif
3273
3274         return 0;
3275 }
3276
3277 long
3278 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3279                v4l2_kioctl func)
3280 {
3281         char    sbuf[128];
3282         void    *mbuf = NULL, *array_buf = NULL;
3283         void    *parg = (void *)arg;
3284         long    err  = -EINVAL;
3285         bool    has_array_args;
3286         bool    always_copy = false;
3287         size_t  array_size = 0;
3288         void __user *user_ptr = NULL;
3289         void    **kernel_ptr = NULL;
3290         unsigned int cmd = video_translate_cmd(orig_cmd);
3291         const size_t ioc_size = _IOC_SIZE(cmd);
3292
3293         /*  Copy arguments into temp kernel buffer  */
3294         if (_IOC_DIR(cmd) != _IOC_NONE) {
3295                 if (ioc_size <= sizeof(sbuf)) {
3296                         parg = sbuf;
3297                 } else {
3298                         /* too big to allocate from stack */
3299                         mbuf = kmalloc(ioc_size, GFP_KERNEL);
3300                         if (NULL == mbuf)
3301                                 return -ENOMEM;
3302                         parg = mbuf;
3303                 }
3304
3305                 err = video_get_user((void __user *)arg, parg, cmd,
3306                                      orig_cmd, &always_copy);
3307                 if (err)
3308                         goto out;
3309         }
3310
3311         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3312         if (err < 0)
3313                 goto out;
3314         has_array_args = err;
3315
3316         if (has_array_args) {
3317                 array_buf = kvmalloc(array_size, GFP_KERNEL);
3318                 err = -ENOMEM;
3319                 if (array_buf == NULL)
3320                         goto out_array_args;
3321                 err = -EFAULT;
3322                 if (in_compat_syscall())
3323                         err = v4l2_compat_get_array_args(file, array_buf,
3324                                                          user_ptr, array_size,
3325                                                          orig_cmd, parg);
3326                 else
3327                         err = copy_from_user(array_buf, user_ptr, array_size) ?
3328                                                                 -EFAULT : 0;
3329                 if (err)
3330                         goto out_array_args;
3331                 *kernel_ptr = array_buf;
3332         }
3333
3334         /* Handles IOCTL */
3335         err = func(file, cmd, parg);
3336         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3337                 err = -ENOTTY;
3338                 goto out;
3339         }
3340
3341         if (err == 0) {
3342                 if (cmd == VIDIOC_DQBUF)
3343                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3344                 else if (cmd == VIDIOC_QBUF)
3345                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3346         }
3347
3348         if (has_array_args) {
3349                 *kernel_ptr = (void __force *)user_ptr;
3350                 if (in_compat_syscall()) {
3351                         int put_err;
3352
3353                         put_err = v4l2_compat_put_array_args(file, user_ptr,
3354                                                              array_buf,
3355                                                              array_size,
3356                                                              orig_cmd, parg);
3357                         if (put_err)
3358                                 err = put_err;
3359                 } else if (copy_to_user(user_ptr, array_buf, array_size)) {
3360                         err = -EFAULT;
3361                 }
3362                 goto out_array_args;
3363         }
3364         /*
3365          * Some ioctls can return an error, but still have valid
3366          * results that must be returned.
3367          */
3368         if (err < 0 && !always_copy)
3369                 goto out;
3370
3371 out_array_args:
3372         if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3373                 err = -EFAULT;
3374 out:
3375         kvfree(array_buf);
3376         kfree(mbuf);
3377         return err;
3378 }
3379
3380 long video_ioctl2(struct file *file,
3381                unsigned int cmd, unsigned long arg)
3382 {
3383         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3384 }
3385 EXPORT_SYMBOL(video_ioctl2);