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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Video capture interface for Linux version 2
   4  *
   5  * A generic framework to process V4L2 ioctl commands.
   6  *
   7  * Authors:     Alan Cox, <[email protected]> (version 1)
   8  *              Mauro Carvalho Chehab <[email protected]> (version 2)
   9  */
  10
  11 #include <linux/compat.h>
  12 #include <linux/mm.h>
  13 #include <linux/module.h>
  14 #include <linux/slab.h>
  15 #include <linux/types.h>
  16 #include <linux/kernel.h>
  17 #include <linux/version.h>
  18
  19 #include <linux/v4l2-subdev.h>
  20 #include <linux/videodev2.h>
  21
  22 #include <media/media-device.h> /* for media_set_bus_info() */
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/videobuf2-v4l2.h>
  30 #include <media/v4l2-mc.h>
  31 #include <media/v4l2-mem2mem.h>
  32
  33 #include <trace/events/v4l2.h>
  34
  35 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  36
  37 struct std_descr {
  38         v4l2_std_id std;
  39         const char *descr;
  40 };
  41
  42 static const struct std_descr standards[] = {
  43         { V4L2_STD_NTSC,        "NTSC"      },
  44         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  45         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  46         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  47         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  48         { V4L2_STD_PAL,         "PAL"       },
  49         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  50         { V4L2_STD_PAL_B,       "PAL-B"     },
  51         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  52         { V4L2_STD_PAL_G,       "PAL-G"     },
  53         { V4L2_STD_PAL_H,       "PAL-H"     },
  54         { V4L2_STD_PAL_I,       "PAL-I"     },
  55         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  56         { V4L2_STD_PAL_D,       "PAL-D"     },
  57         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  58         { V4L2_STD_PAL_K,       "PAL-K"     },
  59         { V4L2_STD_PAL_M,       "PAL-M"     },
  60         { V4L2_STD_PAL_N,       "PAL-N"     },
  61         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  62         { V4L2_STD_PAL_60,      "PAL-60"    },
  63         { V4L2_STD_SECAM,       "SECAM"     },
  64         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  65         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  66         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  67         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  68         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  69         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  70         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  71         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  72         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  73         { 0,                    "Unknown"   }
  74 };
  75
  76 /* video4linux standard ID conversion to standard name
  77  */
  78 const char *v4l2_norm_to_name(v4l2_std_id id)
  79 {
  80         u32 myid = id;
  81         int i;
  82
  83         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  84            64 bit comparisons. So, on that architecture, with some gcc
  85            variants, compilation fails. Currently, the max value is 30bit wide.
  86          */
  87         BUG_ON(myid != id);
  88
  89         for (i = 0; standards[i].std; i++)
  90                 if (myid == standards[i].std)
  91                         break;
  92         return standards[i].descr;
  93 }
  94 EXPORT_SYMBOL(v4l2_norm_to_name);
  95
  96 /* Returns frame period for the given standard */
  97 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
  98 {
  99         if (id & V4L2_STD_525_60) {
 100                 frameperiod->numerator = 1001;
 101                 frameperiod->denominator = 30000;
 102         } else {
 103                 frameperiod->numerator = 1;
 104                 frameperiod->denominator = 25;
 105         }
 106 }
 107 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 108
 109 /* Fill in the fields of a v4l2_standard structure according to the
 110    'id' and 'transmission' parameters.  Returns negative on error.  */
 111 int v4l2_video_std_construct(struct v4l2_standard *vs,
 112                              int id, const char *name)
 113 {
 114         vs->id = id;
 115         v4l2_video_std_frame_period(id, &vs->frameperiod);
 116         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 117         strscpy(vs->name, name, sizeof(vs->name));
 118         return 0;
 119 }
 120 EXPORT_SYMBOL(v4l2_video_std_construct);
 121
 122 /* Fill in the fields of a v4l2_standard structure according to the
 123  * 'id' and 'vs->index' parameters. Returns negative on error. */
 124 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 125 {
 126         v4l2_std_id curr_id = 0;
 127         unsigned int index = vs->index, i, j = 0;
 128         const char *descr = "";
 129
 130         /* Return -ENODATA if the id for the current input
 131            or output is 0, meaning that it doesn't support this API. */
 132         if (id == 0)
 133                 return -ENODATA;
 134
 135         /* Return norm array in a canonical way */
 136         for (i = 0; i <= index && id; i++) {
 137                 /* last std value in the standards array is 0, so this
 138                    while always ends there since (id & 0) == 0. */
 139                 while ((id & standards[j].std) != standards[j].std)
 140                         j++;
 141                 curr_id = standards[j].std;
 142                 descr = standards[j].descr;
 143                 j++;
 144                 if (curr_id == 0)
 145                         break;
 146                 if (curr_id != V4L2_STD_PAL &&
 147                                 curr_id != V4L2_STD_SECAM &&
 148                                 curr_id != V4L2_STD_NTSC)
 149                         id &= ~curr_id;
 150         }
 151         if (i <= index)
 152                 return -EINVAL;
 153
 154         v4l2_video_std_construct(vs, curr_id, descr);
 155         return 0;
 156 }
 157
 158 /* ----------------------------------------------------------------- */
 159 /* some arrays for pretty-printing debug messages of enum types      */
 160
 161 const char *v4l2_field_names[] = {
 162         [V4L2_FIELD_ANY]        = "any",
 163         [V4L2_FIELD_NONE]       = "none",
 164         [V4L2_FIELD_TOP]        = "top",
 165         [V4L2_FIELD_BOTTOM]     = "bottom",
 166         [V4L2_FIELD_INTERLACED] = "interlaced",
 167         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 168         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 169         [V4L2_FIELD_ALTERNATE]  = "alternate",
 170         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 171         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 172 };
 173 EXPORT_SYMBOL(v4l2_field_names);
 174
 175 const char *v4l2_type_names[] = {
 176         [0]                                = "0",
 177         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 178         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 179         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 180         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 181         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 182         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 183         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 184         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 185         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 186         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 187         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 188         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 189         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 190         [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 191 };
 192 EXPORT_SYMBOL(v4l2_type_names);
 193
 194 static const char *v4l2_memory_names[] = {
 195         [V4L2_MEMORY_MMAP]    = "mmap",
 196         [V4L2_MEMORY_USERPTR] = "userptr",
 197         [V4L2_MEMORY_OVERLAY] = "overlay",
 198         [V4L2_MEMORY_DMABUF] = "dmabuf",
 199 };
 200
 201 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 202
 203 /* ------------------------------------------------------------------ */
 204 /* debug help functions                                               */
 205
 206 static void v4l_print_querycap(const void *arg, bool write_only)
 207 {
 208         const struct v4l2_capability *p = arg;
 209
 210         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 211                 (int)sizeof(p->driver), p->driver,
 212                 (int)sizeof(p->card), p->card,
 213                 (int)sizeof(p->bus_info), p->bus_info,
 214                 p->version, p->capabilities, p->device_caps);
 215 }
 216
 217 static void v4l_print_enuminput(const void *arg, bool write_only)
 218 {
 219         const struct v4l2_input *p = arg;
 220
 221         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 222                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 223                 p->tuner, (unsigned long long)p->std, p->status,
 224                 p->capabilities);
 225 }
 226
 227 static void v4l_print_enumoutput(const void *arg, bool write_only)
 228 {
 229         const struct v4l2_output *p = arg;
 230
 231         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 232                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 233                 p->modulator, (unsigned long long)p->std, p->capabilities);
 234 }
 235
 236 static void v4l_print_audio(const void *arg, bool write_only)
 237 {
 238         const struct v4l2_audio *p = arg;
 239
 240         if (write_only)
 241                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 242         else
 243                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 244                         p->index, (int)sizeof(p->name), p->name,
 245                         p->capability, p->mode);
 246 }
 247
 248 static void v4l_print_audioout(const void *arg, bool write_only)
 249 {
 250         const struct v4l2_audioout *p = arg;
 251
 252         if (write_only)
 253                 pr_cont("index=%u\n", p->index);
 254         else
 255                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 256                         p->index, (int)sizeof(p->name), p->name,
 257                         p->capability, p->mode);
 258 }
 259
 260 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 261 {
 262         const struct v4l2_fmtdesc *p = arg;
 263
 264         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
 265                 p->index, prt_names(p->type, v4l2_type_names),
 266                 p->flags, &p->pixelformat, p->mbus_code,
 267                 (int)sizeof(p->description), p->description);
 268 }
 269
 270 static void v4l_print_format(const void *arg, bool write_only)
 271 {
 272         const struct v4l2_format *p = arg;
 273         const struct v4l2_pix_format *pix;
 274         const struct v4l2_pix_format_mplane *mp;
 275         const struct v4l2_vbi_format *vbi;
 276         const struct v4l2_sliced_vbi_format *sliced;
 277         const struct v4l2_window *win;
 278         const struct v4l2_meta_format *meta;
 279         u32 pixelformat;
 280         u32 planes;
 281         unsigned i;
 282
 283         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 284         switch (p->type) {
 285         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 286         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 287                 pix = &p->fmt.pix;
 288                 pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 289                         pix->width, pix->height, &pix->pixelformat,
 290                         prt_names(pix->field, v4l2_field_names),
 291                         pix->bytesperline, pix->sizeimage,
 292                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 293                         pix->quantization, pix->xfer_func);
 294                 break;
 295         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 296         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 297                 mp = &p->fmt.pix_mp;
 298                 pixelformat = mp->pixelformat;
 299                 pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 300                         mp->width, mp->height, &pixelformat,
 301                         prt_names(mp->field, v4l2_field_names),
 302                         mp->colorspace, mp->num_planes, mp->flags,
 303                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 304                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 305                 for (i = 0; i < planes; i++)
 306                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 307                                         mp->plane_fmt[i].bytesperline,
 308                                         mp->plane_fmt[i].sizeimage);
 309                 break;
 310         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 311         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 312                 win = &p->fmt.win;
 313                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, global_alpha=0x%02x\n",
 314                         win->w.width, win->w.height, win->w.left, win->w.top,
 315                         prt_names(win->field, v4l2_field_names),
 316                         win->chromakey, win->global_alpha);
 317                 break;
 318         case V4L2_BUF_TYPE_VBI_CAPTURE:
 319         case V4L2_BUF_TYPE_VBI_OUTPUT:
 320                 vbi = &p->fmt.vbi;
 321                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
 322                         vbi->sampling_rate, vbi->offset,
 323                         vbi->samples_per_line, &vbi->sample_format,
 324                         vbi->start[0], vbi->start[1],
 325                         vbi->count[0], vbi->count[1]);
 326                 break;
 327         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 328         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 329                 sliced = &p->fmt.sliced;
 330                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 331                                 sliced->service_set, sliced->io_size);
 332                 for (i = 0; i < 24; i++)
 333                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 334                                 sliced->service_lines[0][i],
 335                                 sliced->service_lines[1][i]);
 336                 break;
 337         case V4L2_BUF_TYPE_SDR_CAPTURE:
 338         case V4L2_BUF_TYPE_SDR_OUTPUT:
 339                 pixelformat = p->fmt.sdr.pixelformat;
 340                 pr_cont(", pixelformat=%p4cc\n", &pixelformat);
 341                 break;
 342         case V4L2_BUF_TYPE_META_CAPTURE:
 343         case V4L2_BUF_TYPE_META_OUTPUT:
 344                 meta = &p->fmt.meta;
 345                 pixelformat = meta->dataformat;
 346                 pr_cont(", dataformat=%p4cc, buffersize=%u\n",
 347                         &pixelformat, meta->buffersize);
 348                 break;
 349         }
 350 }
 351
 352 static void v4l_print_framebuffer(const void *arg, bool write_only)
 353 {
 354         const struct v4l2_framebuffer *p = arg;
 355
 356         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 357                 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
 358                 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
 359                 p->fmt.colorspace);
 360 }
 361
 362 static void v4l_print_buftype(const void *arg, bool write_only)
 363 {
 364         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 365 }
 366
 367 static void v4l_print_modulator(const void *arg, bool write_only)
 368 {
 369         const struct v4l2_modulator *p = arg;
 370
 371         if (write_only)
 372                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 373         else
 374                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 375                         p->index, (int)sizeof(p->name), p->name, p->capability,
 376                         p->rangelow, p->rangehigh, p->txsubchans);
 377 }
 378
 379 static void v4l_print_tuner(const void *arg, bool write_only)
 380 {
 381         const struct v4l2_tuner *p = arg;
 382
 383         if (write_only)
 384                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 385         else
 386                 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",
 387                         p->index, (int)sizeof(p->name), p->name, p->type,
 388                         p->capability, p->rangelow,
 389                         p->rangehigh, p->signal, p->afc,
 390                         p->rxsubchans, p->audmode);
 391 }
 392
 393 static void v4l_print_frequency(const void *arg, bool write_only)
 394 {
 395         const struct v4l2_frequency *p = arg;
 396
 397         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 398                                 p->tuner, p->type, p->frequency);
 399 }
 400
 401 static void v4l_print_standard(const void *arg, bool write_only)
 402 {
 403         const struct v4l2_standard *p = arg;
 404
 405         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 406                 p->index,
 407                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 408                 p->frameperiod.numerator,
 409                 p->frameperiod.denominator,
 410                 p->framelines);
 411 }
 412
 413 static void v4l_print_std(const void *arg, bool write_only)
 414 {
 415         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 416 }
 417
 418 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 419 {
 420         const struct v4l2_hw_freq_seek *p = arg;
 421
 422         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 423                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 424                 p->rangelow, p->rangehigh);
 425 }
 426
 427 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 428 {
 429         const struct v4l2_requestbuffers *p = arg;
 430
 431         pr_cont("count=%d, type=%s, memory=%s\n",
 432                 p->count,
 433                 prt_names(p->type, v4l2_type_names),
 434                 prt_names(p->memory, v4l2_memory_names));
 435 }
 436
 437 static void v4l_print_buffer(const void *arg, bool write_only)
 438 {
 439         const struct v4l2_buffer *p = arg;
 440         const struct v4l2_timecode *tc = &p->timecode;
 441         const struct v4l2_plane *plane;
 442         int i;
 443
 444         pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 445                         (int)p->timestamp.tv_sec / 3600,
 446                         ((int)p->timestamp.tv_sec / 60) % 60,
 447                         ((int)p->timestamp.tv_sec % 60),
 448                         (long)p->timestamp.tv_usec,
 449                         p->index,
 450                         prt_names(p->type, v4l2_type_names), p->request_fd,
 451                         p->flags, prt_names(p->field, v4l2_field_names),
 452                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 453
 454         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 455                 pr_cont("\n");
 456                 for (i = 0; i < p->length; ++i) {
 457                         plane = &p->m.planes[i];
 458                         printk(KERN_DEBUG
 459                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 460                                 i, plane->bytesused, plane->data_offset,
 461                                 plane->m.userptr, plane->length);
 462                 }
 463         } else {
 464                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 465                         p->bytesused, p->m.userptr, p->length);
 466         }
 467
 468         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 469                         tc->hours, tc->minutes, tc->seconds,
 470                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 471 }
 472
 473 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 474 {
 475         const struct v4l2_exportbuffer *p = arg;
 476
 477         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 478                 p->fd, prt_names(p->type, v4l2_type_names),
 479                 p->index, p->plane, p->flags);
 480 }
 481
 482 static void v4l_print_create_buffers(const void *arg, bool write_only)
 483 {
 484         const struct v4l2_create_buffers *p = arg;
 485
 486         pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ",
 487                 p->index, p->count, prt_names(p->memory, v4l2_memory_names),
 488                 p->capabilities);
 489         v4l_print_format(&p->format, write_only);
 490 }
 491
 492 static void v4l_print_streamparm(const void *arg, bool write_only)
 493 {
 494         const struct v4l2_streamparm *p = arg;
 495
 496         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 497
 498         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 499             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 500                 const struct v4l2_captureparm *c = &p->parm.capture;
 501
 502                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 503                         c->capability, c->capturemode,
 504                         c->timeperframe.numerator, c->timeperframe.denominator,
 505                         c->extendedmode, c->readbuffers);
 506         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 507                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 508                 const struct v4l2_outputparm *c = &p->parm.output;
 509
 510                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 511                         c->capability, c->outputmode,
 512                         c->timeperframe.numerator, c->timeperframe.denominator,
 513                         c->extendedmode, c->writebuffers);
 514         } else {
 515                 pr_cont("\n");
 516         }
 517 }
 518
 519 static void v4l_print_queryctrl(const void *arg, bool write_only)
 520 {
 521         const struct v4l2_queryctrl *p = arg;
 522
 523         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 524                         p->id, p->type, (int)sizeof(p->name), p->name,
 525                         p->minimum, p->maximum,
 526                         p->step, p->default_value, p->flags);
 527 }
 528
 529 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 530 {
 531         const struct v4l2_query_ext_ctrl *p = arg;
 532
 533         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",
 534                         p->id, p->type, (int)sizeof(p->name), p->name,
 535                         p->minimum, p->maximum,
 536                         p->step, p->default_value, p->flags,
 537                         p->elem_size, p->elems, p->nr_of_dims,
 538                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 539 }
 540
 541 static void v4l_print_querymenu(const void *arg, bool write_only)
 542 {
 543         const struct v4l2_querymenu *p = arg;
 544
 545         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 546 }
 547
 548 static void v4l_print_control(const void *arg, bool write_only)
 549 {
 550         const struct v4l2_control *p = arg;
 551         const char *name = v4l2_ctrl_get_name(p->id);
 552
 553         if (name)
 554                 pr_cont("name=%s, ", name);
 555         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 556 }
 557
 558 static void v4l_print_ext_controls(const void *arg, bool write_only)
 559 {
 560         const struct v4l2_ext_controls *p = arg;
 561         int i;
 562
 563         pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 564                         p->which, p->count, p->error_idx, p->request_fd);
 565         for (i = 0; i < p->count; i++) {
 566                 unsigned int id = p->controls[i].id;
 567                 const char *name = v4l2_ctrl_get_name(id);
 568
 569                 if (name)
 570                         pr_cont(", name=%s", name);
 571                 if (!p->controls[i].size)
 572                         pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
 573                 else
 574                         pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
 575         }
 576         pr_cont("\n");
 577 }
 578
 579 static void v4l_print_cropcap(const void *arg, bool write_only)
 580 {
 581         const struct v4l2_cropcap *p = arg;
 582
 583         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 584                 prt_names(p->type, v4l2_type_names),
 585                 p->bounds.width, p->bounds.height,
 586                 p->bounds.left, p->bounds.top,
 587                 p->defrect.width, p->defrect.height,
 588                 p->defrect.left, p->defrect.top,
 589                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 590 }
 591
 592 static void v4l_print_crop(const void *arg, bool write_only)
 593 {
 594         const struct v4l2_crop *p = arg;
 595
 596         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 597                 prt_names(p->type, v4l2_type_names),
 598                 p->c.width, p->c.height,
 599                 p->c.left, p->c.top);
 600 }
 601
 602 static void v4l_print_selection(const void *arg, bool write_only)
 603 {
 604         const struct v4l2_selection *p = arg;
 605
 606         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 607                 prt_names(p->type, v4l2_type_names),
 608                 p->target, p->flags,
 609                 p->r.width, p->r.height, p->r.left, p->r.top);
 610 }
 611
 612 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 613 {
 614         const struct v4l2_jpegcompression *p = arg;
 615
 616         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 617                 p->quality, p->APPn, p->APP_len,
 618                 p->COM_len, p->jpeg_markers);
 619 }
 620
 621 static void v4l_print_enc_idx(const void *arg, bool write_only)
 622 {
 623         const struct v4l2_enc_idx *p = arg;
 624
 625         pr_cont("entries=%d, entries_cap=%d\n",
 626                         p->entries, p->entries_cap);
 627 }
 628
 629 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 630 {
 631         const struct v4l2_encoder_cmd *p = arg;
 632
 633         pr_cont("cmd=%d, flags=0x%x\n",
 634                         p->cmd, p->flags);
 635 }
 636
 637 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 638 {
 639         const struct v4l2_decoder_cmd *p = arg;
 640
 641         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 642
 643         if (p->cmd == V4L2_DEC_CMD_START)
 644                 pr_info("speed=%d, format=%u\n",
 645                                 p->start.speed, p->start.format);
 646         else if (p->cmd == V4L2_DEC_CMD_STOP)
 647                 pr_info("pts=%llu\n", p->stop.pts);
 648 }
 649
 650 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 651 {
 652         const struct v4l2_dbg_chip_info *p = arg;
 653
 654         pr_cont("type=%u, ", p->match.type);
 655         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 656                 pr_cont("name=%.*s, ",
 657                                 (int)sizeof(p->match.name), p->match.name);
 658         else
 659                 pr_cont("addr=%u, ", p->match.addr);
 660         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 661 }
 662
 663 static void v4l_print_dbg_register(const void *arg, bool write_only)
 664 {
 665         const struct v4l2_dbg_register *p = arg;
 666
 667         pr_cont("type=%u, ", p->match.type);
 668         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 669                 pr_cont("name=%.*s, ",
 670                                 (int)sizeof(p->match.name), p->match.name);
 671         else
 672                 pr_cont("addr=%u, ", p->match.addr);
 673         pr_cont("reg=0x%llx, val=0x%llx\n",
 674                         p->reg, p->val);
 675 }
 676
 677 static void v4l_print_dv_timings(const void *arg, bool write_only)
 678 {
 679         const struct v4l2_dv_timings *p = arg;
 680
 681         switch (p->type) {
 682         case V4L2_DV_BT_656_1120:
 683                 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",
 684                                 p->bt.interlaced, p->bt.pixelclock,
 685                                 p->bt.width, p->bt.height,
 686                                 p->bt.polarities, p->bt.hfrontporch,
 687                                 p->bt.hsync, p->bt.hbackporch,
 688                                 p->bt.vfrontporch, p->bt.vsync,
 689                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 690                                 p->bt.il_vsync, p->bt.il_vbackporch,
 691                                 p->bt.standards, p->bt.flags);
 692                 break;
 693         default:
 694                 pr_cont("type=%d\n", p->type);
 695                 break;
 696         }
 697 }
 698
 699 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 700 {
 701         const struct v4l2_enum_dv_timings *p = arg;
 702
 703         pr_cont("index=%u, ", p->index);
 704         v4l_print_dv_timings(&p->timings, write_only);
 705 }
 706
 707 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 708 {
 709         const struct v4l2_dv_timings_cap *p = arg;
 710
 711         switch (p->type) {
 712         case V4L2_DV_BT_656_1120:
 713                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 714                         p->bt.min_width, p->bt.max_width,
 715                         p->bt.min_height, p->bt.max_height,
 716                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 717                         p->bt.standards, p->bt.capabilities);
 718                 break;
 719         default:
 720                 pr_cont("type=%u\n", p->type);
 721                 break;
 722         }
 723 }
 724
 725 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 726 {
 727         const struct v4l2_frmsizeenum *p = arg;
 728
 729         pr_cont("index=%u, pixelformat=%p4cc, type=%u",
 730                 p->index, &p->pixel_format, p->type);
 731         switch (p->type) {
 732         case V4L2_FRMSIZE_TYPE_DISCRETE:
 733                 pr_cont(", wxh=%ux%u\n",
 734                         p->discrete.width, p->discrete.height);
 735                 break;
 736         case V4L2_FRMSIZE_TYPE_STEPWISE:
 737                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 738                                 p->stepwise.min_width,
 739                                 p->stepwise.min_height,
 740                                 p->stepwise.max_width,
 741                                 p->stepwise.max_height,
 742                                 p->stepwise.step_width,
 743                                 p->stepwise.step_height);
 744                 break;
 745         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 746         default:
 747                 pr_cont("\n");
 748                 break;
 749         }
 750 }
 751
 752 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 753 {
 754         const struct v4l2_frmivalenum *p = arg;
 755
 756         pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
 757                 p->index, &p->pixel_format, p->width, p->height, p->type);
 758         switch (p->type) {
 759         case V4L2_FRMIVAL_TYPE_DISCRETE:
 760                 pr_cont(", fps=%d/%d\n",
 761                                 p->discrete.numerator,
 762                                 p->discrete.denominator);
 763                 break;
 764         case V4L2_FRMIVAL_TYPE_STEPWISE:
 765                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 766                                 p->stepwise.min.numerator,
 767                                 p->stepwise.min.denominator,
 768                                 p->stepwise.max.numerator,
 769                                 p->stepwise.max.denominator,
 770                                 p->stepwise.step.numerator,
 771                                 p->stepwise.step.denominator);
 772                 break;
 773         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 774         default:
 775                 pr_cont("\n");
 776                 break;
 777         }
 778 }
 779
 780 static void v4l_print_event(const void *arg, bool write_only)
 781 {
 782         const struct v4l2_event *p = arg;
 783         const struct v4l2_event_ctrl *c;
 784
 785         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 786                         p->type, p->pending, p->sequence, p->id,
 787                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 788         switch (p->type) {
 789         case V4L2_EVENT_VSYNC:
 790                 printk(KERN_DEBUG "field=%s\n",
 791                         prt_names(p->u.vsync.field, v4l2_field_names));
 792                 break;
 793         case V4L2_EVENT_CTRL:
 794                 c = &p->u.ctrl;
 795                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 796                         c->changes, c->type);
 797                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 798                         pr_cont("value64=%lld, ", c->value64);
 799                 else
 800                         pr_cont("value=%d, ", c->value);
 801                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 802                         c->flags, c->minimum, c->maximum,
 803                         c->step, c->default_value);
 804                 break;
 805         case V4L2_EVENT_FRAME_SYNC:
 806                 pr_cont("frame_sequence=%u\n",
 807                         p->u.frame_sync.frame_sequence);
 808                 break;
 809         }
 810 }
 811
 812 static void v4l_print_event_subscription(const void *arg, bool write_only)
 813 {
 814         const struct v4l2_event_subscription *p = arg;
 815
 816         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 817                         p->type, p->id, p->flags);
 818 }
 819
 820 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 821 {
 822         const struct v4l2_sliced_vbi_cap *p = arg;
 823         int i;
 824
 825         pr_cont("type=%s, service_set=0x%08x\n",
 826                         prt_names(p->type, v4l2_type_names), p->service_set);
 827         for (i = 0; i < 24; i++)
 828                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 829                                 p->service_lines[0][i],
 830                                 p->service_lines[1][i]);
 831 }
 832
 833 static void v4l_print_freq_band(const void *arg, bool write_only)
 834 {
 835         const struct v4l2_frequency_band *p = arg;
 836
 837         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 838                         p->tuner, p->type, p->index,
 839                         p->capability, p->rangelow,
 840                         p->rangehigh, p->modulation);
 841 }
 842
 843 static void v4l_print_edid(const void *arg, bool write_only)
 844 {
 845         const struct v4l2_edid *p = arg;
 846
 847         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 848                 p->pad, p->start_block, p->blocks);
 849 }
 850
 851 static void v4l_print_u32(const void *arg, bool write_only)
 852 {
 853         pr_cont("value=%u\n", *(const u32 *)arg);
 854 }
 855
 856 static void v4l_print_newline(const void *arg, bool write_only)
 857 {
 858         pr_cont("\n");
 859 }
 860
 861 static void v4l_print_default(const void *arg, bool write_only)
 862 {
 863         pr_cont("driver-specific ioctl\n");
 864 }
 865
 866 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
 867 {
 868         __u32 i;
 869
 870         /* zero the reserved fields */
 871         c->reserved[0] = 0;
 872         for (i = 0; i < c->count; i++)
 873                 c->controls[i].reserved2[0] = 0;
 874
 875         switch (c->which) {
 876         case V4L2_CID_PRIVATE_BASE:
 877                 /*
 878                  * V4L2_CID_PRIVATE_BASE cannot be used as control class
 879                  * when using extended controls.
 880                  * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 881                  * is it allowed for backwards compatibility.
 882                  */
 883                 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
 884                         return false;
 885                 break;
 886         case V4L2_CTRL_WHICH_DEF_VAL:
 887                 /* Default value cannot be changed */
 888                 if (ioctl == VIDIOC_S_EXT_CTRLS ||
 889                     ioctl == VIDIOC_TRY_EXT_CTRLS) {
 890                         c->error_idx = c->count;
 891                         return false;
 892                 }
 893                 return true;
 894         case V4L2_CTRL_WHICH_CUR_VAL:
 895                 return true;
 896         case V4L2_CTRL_WHICH_REQUEST_VAL:
 897                 c->error_idx = c->count;
 898                 return false;
 899         }
 900
 901         /* Check that all controls are from the same control class. */
 902         for (i = 0; i < c->count; i++) {
 903                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 904                         c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
 905                                                                       c->count;
 906                         return false;
 907                 }
 908         }
 909         return true;
 910 }
 911
 912 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 913 {
 914         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 915                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 916                              V4L2_CAP_VIDEO_OUTPUT |
 917                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 918                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 919         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 920                               V4L2_CAP_META_OUTPUT;
 921         struct video_device *vfd = video_devdata(file);
 922         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 923         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 924                       (vfd->device_caps & vid_caps);
 925         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 926         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 927         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 928         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 929                        (vfd->device_caps & meta_caps);
 930         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 931         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 932
 933         if (ops == NULL)
 934                 return -EINVAL;
 935
 936         switch (type) {
 937         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 938                 if ((is_vid || is_tch) && is_rx &&
 939                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 940                         return 0;
 941                 break;
 942         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 943                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 944                         return 0;
 945                 break;
 946         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 947                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 948                         return 0;
 949                 break;
 950         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 951                 if (is_vid && is_tx &&
 952                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 953                         return 0;
 954                 break;
 955         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 956                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 957                         return 0;
 958                 break;
 959         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 960                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 961                         return 0;
 962                 break;
 963         case V4L2_BUF_TYPE_VBI_CAPTURE:
 964                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 965                         return 0;
 966                 break;
 967         case V4L2_BUF_TYPE_VBI_OUTPUT:
 968                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 969                         return 0;
 970                 break;
 971         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 972                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 973                         return 0;
 974                 break;
 975         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 976                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 977                         return 0;
 978                 break;
 979         case V4L2_BUF_TYPE_SDR_CAPTURE:
 980                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 981                         return 0;
 982                 break;
 983         case V4L2_BUF_TYPE_SDR_OUTPUT:
 984                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 985                         return 0;
 986                 break;
 987         case V4L2_BUF_TYPE_META_CAPTURE:
 988                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
 989                         return 0;
 990                 break;
 991         case V4L2_BUF_TYPE_META_OUTPUT:
 992                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
 993                         return 0;
 994                 break;
 995         default:
 996                 break;
 997         }
 998         return -EINVAL;
 999 }
1000
1001 static void v4l_sanitize_colorspace(u32 pixelformat, u32 *colorspace,
1002                                     u32 *encoding, u32 *quantization,
1003                                     u32 *xfer_func)
1004 {
1005         bool is_hsv = pixelformat == V4L2_PIX_FMT_HSV24 ||
1006                       pixelformat == V4L2_PIX_FMT_HSV32;
1007
1008         if (!v4l2_is_colorspace_valid(*colorspace)) {
1009                 *colorspace = V4L2_COLORSPACE_DEFAULT;
1010                 *encoding = V4L2_YCBCR_ENC_DEFAULT;
1011                 *quantization = V4L2_QUANTIZATION_DEFAULT;
1012                 *xfer_func = V4L2_XFER_FUNC_DEFAULT;
1013         }
1014
1015         if ((!is_hsv && !v4l2_is_ycbcr_enc_valid(*encoding)) ||
1016             (is_hsv && !v4l2_is_hsv_enc_valid(*encoding)))
1017                 *encoding = V4L2_YCBCR_ENC_DEFAULT;
1018
1019         if (!v4l2_is_quant_valid(*quantization))
1020                 *quantization = V4L2_QUANTIZATION_DEFAULT;
1021
1022         if (!v4l2_is_xfer_func_valid(*xfer_func))
1023                 *xfer_func = V4L2_XFER_FUNC_DEFAULT;
1024 }
1025
1026 static void v4l_sanitize_format(struct v4l2_format *fmt)
1027 {
1028         unsigned int offset;
1029
1030         /* Make sure num_planes is not bogus */
1031         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1032             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1033                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1034                                                VIDEO_MAX_PLANES);
1035
1036         /*
1037          * The v4l2_pix_format structure has been extended with fields that were
1038          * not previously required to be set to zero by applications. The priv
1039          * field, when set to a magic value, indicates that the extended fields
1040          * are valid. Otherwise they will contain undefined values. To simplify
1041          * the API towards drivers zero the extended fields and set the priv
1042          * field to the magic value when the extended pixel format structure
1043          * isn't used by applications.
1044          */
1045         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1046             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1047                 if (fmt->fmt.pix.priv != V4L2_PIX_FMT_PRIV_MAGIC) {
1048                         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1049
1050                         offset = offsetof(struct v4l2_pix_format, priv)
1051                                + sizeof(fmt->fmt.pix.priv);
1052                         memset(((void *)&fmt->fmt.pix) + offset, 0,
1053                                sizeof(fmt->fmt.pix) - offset);
1054                 }
1055         }
1056
1057         /* Replace invalid colorspace values with defaults. */
1058         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1059             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1060                 v4l_sanitize_colorspace(fmt->fmt.pix.pixelformat,
1061                                         &fmt->fmt.pix.colorspace,
1062                                         &fmt->fmt.pix.ycbcr_enc,
1063                                         &fmt->fmt.pix.quantization,
1064                                         &fmt->fmt.pix.xfer_func);
1065         } else if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1066                    fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
1067                 u32 ycbcr_enc = fmt->fmt.pix_mp.ycbcr_enc;
1068                 u32 quantization = fmt->fmt.pix_mp.quantization;
1069                 u32 xfer_func = fmt->fmt.pix_mp.xfer_func;
1070
1071                 v4l_sanitize_colorspace(fmt->fmt.pix_mp.pixelformat,
1072                                         &fmt->fmt.pix_mp.colorspace, &ycbcr_enc,
1073                                         &quantization, &xfer_func);
1074
1075                 fmt->fmt.pix_mp.ycbcr_enc = ycbcr_enc;
1076                 fmt->fmt.pix_mp.quantization = quantization;
1077                 fmt->fmt.pix_mp.xfer_func = xfer_func;
1078         }
1079 }
1080
1081 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1082                                 struct file *file, void *fh, void *arg)
1083 {
1084         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1085         struct video_device *vfd = video_devdata(file);
1086         int ret;
1087
1088         cap->version = LINUX_VERSION_CODE;
1089         cap->device_caps = vfd->device_caps;
1090         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1091
1092         media_set_bus_info(cap->bus_info, sizeof(cap->bus_info),
1093                            vfd->dev_parent);
1094
1095         ret = ops->vidioc_querycap(file, fh, cap);
1096
1097         /*
1098          * Drivers must not change device_caps, so check for this and
1099          * warn if this happened.
1100          */
1101         WARN_ON(cap->device_caps != vfd->device_caps);
1102         /*
1103          * Check that capabilities is a superset of
1104          * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1105          */
1106         WARN_ON((cap->capabilities &
1107                  (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1108                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1109         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1110         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1111
1112         return ret;
1113 }
1114
1115 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1116                        struct file *file, void *fh, void *arg)
1117 {
1118         struct video_device *vfd = video_devdata(file);
1119
1120         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1121                 *(int *)arg = 0;
1122                 return 0;
1123         }
1124
1125         return ops->vidioc_g_input(file, fh, arg);
1126 }
1127
1128 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1129                         struct file *file, void *fh, void *arg)
1130 {
1131         struct video_device *vfd = video_devdata(file);
1132
1133         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1134                 *(int *)arg = 0;
1135                 return 0;
1136         }
1137
1138         return ops->vidioc_g_output(file, fh, arg);
1139 }
1140
1141 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1142                                 struct file *file, void *fh, void *arg)
1143 {
1144         struct video_device *vfd = video_devdata(file);
1145         int ret;
1146
1147         ret = v4l_enable_media_source(vfd);
1148         if (ret)
1149                 return ret;
1150
1151         if (vfd->device_caps & V4L2_CAP_IO_MC)
1152                 return  *(int *)arg ? -EINVAL : 0;
1153
1154         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1155 }
1156
1157 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1158                                 struct file *file, void *fh, void *arg)
1159 {
1160         struct video_device *vfd = video_devdata(file);
1161
1162         if (vfd->device_caps & V4L2_CAP_IO_MC)
1163                 return  *(int *)arg ? -EINVAL : 0;
1164
1165         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1166 }
1167
1168 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1169                                 struct file *file, void *fh, void *arg)
1170 {
1171         struct video_device *vfd;
1172         u32 *p = arg;
1173
1174         vfd = video_devdata(file);
1175         *p = v4l2_prio_max(vfd->prio);
1176         return 0;
1177 }
1178
1179 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1180                                 struct file *file, void *fh, void *arg)
1181 {
1182         struct video_device *vfd;
1183         struct v4l2_fh *vfh;
1184         u32 *p = arg;
1185
1186         vfd = video_devdata(file);
1187         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1188                 return -ENOTTY;
1189         vfh = file->private_data;
1190         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1191 }
1192
1193 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1194                                 struct file *file, void *fh, void *arg)
1195 {
1196         struct video_device *vfd = video_devdata(file);
1197         struct v4l2_input *p = arg;
1198
1199         /*
1200          * We set the flags for CAP_DV_TIMINGS &
1201          * CAP_STD here based on ioctl handler provided by the
1202          * driver. If the driver doesn't support these
1203          * for a specific input, it must override these flags.
1204          */
1205         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1206                 p->capabilities |= V4L2_IN_CAP_STD;
1207
1208         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1209                 if (p->index)
1210                         return -EINVAL;
1211                 strscpy(p->name, vfd->name, sizeof(p->name));
1212                 p->type = V4L2_INPUT_TYPE_CAMERA;
1213                 return 0;
1214         }
1215
1216         return ops->vidioc_enum_input(file, fh, p);
1217 }
1218
1219 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1220                                 struct file *file, void *fh, void *arg)
1221 {
1222         struct video_device *vfd = video_devdata(file);
1223         struct v4l2_output *p = arg;
1224
1225         /*
1226          * We set the flags for CAP_DV_TIMINGS &
1227          * CAP_STD here based on ioctl handler provided by the
1228          * driver. If the driver doesn't support these
1229          * for a specific output, it must override these flags.
1230          */
1231         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1232                 p->capabilities |= V4L2_OUT_CAP_STD;
1233
1234         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1235                 if (p->index)
1236                         return -EINVAL;
1237                 strscpy(p->name, vfd->name, sizeof(p->name));
1238                 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1239                 return 0;
1240         }
1241
1242         return ops->vidioc_enum_output(file, fh, p);
1243 }
1244
1245 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1246 {
1247         const unsigned sz = sizeof(fmt->description);
1248         const char *descr = NULL;
1249         u32 flags = 0;
1250
1251         /*
1252          * We depart from the normal coding style here since the descriptions
1253          * should be aligned so it is easy to see which descriptions will be
1254          * longer than 31 characters (the max length for a description).
1255          * And frankly, this is easier to read anyway.
1256          *
1257          * Note that gcc will use O(log N) comparisons to find the right case.
1258          */
1259         switch (fmt->pixelformat) {
1260         /* Max description length mask: descr = "0123456789012345678901234567890" */
1261         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1262         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1263         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1264         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1265         case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1266         case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1267         case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1268         case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1269         case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1270         case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1271         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1272         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1273         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1274         case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1275         case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1276         case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1277         case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1278         case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1279         case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1280         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1281         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1282         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1283         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1284         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1285         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1286         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1287         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1288         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1289         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1290         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1291         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1292         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1293         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1294         case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1295         case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1296         case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1297         case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1298         case V4L2_PIX_FMT_RGBX1010102:  descr = "32-bit RGBX 10-10-10-2"; break;
1299         case V4L2_PIX_FMT_RGBA1010102:  descr = "32-bit RGBA 10-10-10-2"; break;
1300         case V4L2_PIX_FMT_ARGB2101010:  descr = "32-bit ARGB 2-10-10-10"; break;
1301         case V4L2_PIX_FMT_BGR48_12:     descr = "12-bit Depth BGR"; break;
1302         case V4L2_PIX_FMT_ABGR64_12:    descr = "12-bit Depth BGRA"; break;
1303         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1304         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1305         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1306         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1307         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1308         case V4L2_PIX_FMT_Y012:         descr = "12-bit Greyscale (bits 15-4)"; break;
1309         case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1310         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1311         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1312         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1313         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1314         case V4L2_PIX_FMT_IPU3_Y10:     descr = "10-bit greyscale (IPU3 Packed)"; break;
1315         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1316         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1317         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1318         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1319         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1320         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1321         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1322         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1323         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1324         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1325         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1326         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1327         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1328         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1329         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1330         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1331         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1332         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1333         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1334         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1335         case V4L2_PIX_FMT_YUV24:        descr = "24-bit YUV 4:4:4 8-8-8"; break;
1336         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1337         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1338         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1339         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1340         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1341         case V4L2_PIX_FMT_YUVA32:       descr = "32-bit YUVA 8-8-8-8"; break;
1342         case V4L2_PIX_FMT_YUVX32:       descr = "32-bit YUVX 8-8-8-8"; break;
1343         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1344         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1345         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1346         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1347         case V4L2_PIX_FMT_YUV48_12:     descr = "12-bit YUV 4:4:4 Packed"; break;
1348         case V4L2_PIX_FMT_NV12:         descr = "Y/UV 4:2:0"; break;
1349         case V4L2_PIX_FMT_NV21:         descr = "Y/VU 4:2:0"; break;
1350         case V4L2_PIX_FMT_NV16:         descr = "Y/UV 4:2:2"; break;
1351         case V4L2_PIX_FMT_NV61:         descr = "Y/VU 4:2:2"; break;
1352         case V4L2_PIX_FMT_NV24:         descr = "Y/UV 4:4:4"; break;
1353         case V4L2_PIX_FMT_NV42:         descr = "Y/VU 4:4:4"; break;
1354         case V4L2_PIX_FMT_P010:         descr = "10-bit Y/UV 4:2:0"; break;
1355         case V4L2_PIX_FMT_P012:         descr = "12-bit Y/UV 4:2:0"; break;
1356         case V4L2_PIX_FMT_NV12_4L4:     descr = "Y/UV 4:2:0 (4x4 Linear)"; break;
1357         case V4L2_PIX_FMT_NV12_16L16:   descr = "Y/UV 4:2:0 (16x16 Linear)"; break;
1358         case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/UV 4:2:0 (32x32 Linear)"; break;
1359         case V4L2_PIX_FMT_P010_4L4:     descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
1360         case V4L2_PIX_FMT_NV12M:        descr = "Y/UV 4:2:0 (N-C)"; break;
1361         case V4L2_PIX_FMT_NV21M:        descr = "Y/VU 4:2:0 (N-C)"; break;
1362         case V4L2_PIX_FMT_NV16M:        descr = "Y/UV 4:2:2 (N-C)"; break;
1363         case V4L2_PIX_FMT_NV61M:        descr = "Y/VU 4:2:2 (N-C)"; break;
1364         case V4L2_PIX_FMT_NV12MT:       descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break;
1365         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break;
1366         case V4L2_PIX_FMT_P012M:        descr = "12-bit Y/UV 4:2:0 (N-C)"; break;
1367         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1368         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1369         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1370         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1371         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1372         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1373         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1374         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1375         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1376         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1377         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1378         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1379         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1380         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1381         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1382         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1383         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1384         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1385         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1386         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1387         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1388         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1389         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1390         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1391         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1392         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1393         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1394         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1395         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1396         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1397         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1398         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1399         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1400         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1401         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1402         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1403         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1404         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1405         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1406         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1407         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1408         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1409         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1410         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1411         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1412         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1413         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1414         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1415         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1416         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1417         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1418         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1419         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1420         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1421         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1422         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1423         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1424         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1425         case V4L2_PIX_FMT_MM21:         descr = "Mediatek 8-bit Block Format"; break;
1426         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1427         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1428         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1429         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1430         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1431         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1432         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1433         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1434         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1435         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1436         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1437         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1438         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1439         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1440         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1441         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1442         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1443         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1444         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1445         case V4L2_META_FMT_RK_ISP1_PARAMS:      descr = "Rockchip ISP1 3A Parameters"; break;
1446         case V4L2_META_FMT_RK_ISP1_STAT_3A:     descr = "Rockchip ISP1 3A Statistics"; break;
1447         case V4L2_PIX_FMT_NV12_8L128:   descr = "NV12 (8x128 Linear)"; break;
1448         case V4L2_PIX_FMT_NV12M_8L128:  descr = "NV12M (8x128 Linear)"; break;
1449         case V4L2_PIX_FMT_NV12_10BE_8L128:      descr = "10-bit NV12 (8x128 Linear, BE)"; break;
1450         case V4L2_PIX_FMT_NV12M_10BE_8L128:     descr = "10-bit NV12M (8x128 Linear, BE)"; break;
1451         case V4L2_PIX_FMT_Y210:         descr = "10-bit YUYV Packed"; break;
1452         case V4L2_PIX_FMT_Y212:         descr = "12-bit YUYV Packed"; break;
1453         case V4L2_PIX_FMT_Y216:         descr = "16-bit YUYV Packed"; break;
1454
1455         default:
1456                 /* Compressed formats */
1457                 flags = V4L2_FMT_FLAG_COMPRESSED;
1458                 switch (fmt->pixelformat) {
1459                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1460                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1461                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1462                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1463                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1464                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1465                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1466                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1467                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1468                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1469                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1470                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1471                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1472                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1473                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1474                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1475                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1476                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1477                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1478                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1479                 case V4L2_PIX_FMT_VP9_FRAME:    descr = "VP9 Frame"; break;
1480                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1481                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1482                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1483                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1484                 case V4L2_PIX_FMT_SPK:          descr = "Sorenson Spark"; break;
1485                 case V4L2_PIX_FMT_RV30:         descr = "RealVideo 8"; break;
1486                 case V4L2_PIX_FMT_RV40:         descr = "RealVideo 9 & 10"; break;
1487                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1488                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1489                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1490                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1491                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1492                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1493                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1494                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1495                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1496                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1497                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1498                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1499                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1500                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1501                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1502                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1503                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1504                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1505                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1506                 case V4L2_PIX_FMT_QC08C:        descr = "QCOM Compressed 8-bit Format"; break;
1507                 case V4L2_PIX_FMT_QC10C:        descr = "QCOM Compressed 10-bit Format"; break;
1508                 case V4L2_PIX_FMT_AJPG:         descr = "Aspeed JPEG"; break;
1509                 default:
1510                         if (fmt->description[0])
1511                                 return;
1512                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1513                         flags = 0;
1514                         snprintf(fmt->description, sz, "%p4cc",
1515                                  &fmt->pixelformat);
1516                         break;
1517                 }
1518         }
1519
1520         if (descr)
1521                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1522         fmt->flags |= flags;
1523 }
1524
1525 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1526                                 struct file *file, void *fh, void *arg)
1527 {
1528         struct video_device *vdev = video_devdata(file);
1529         struct v4l2_fmtdesc *p = arg;
1530         int ret = check_fmt(file, p->type);
1531         u32 mbus_code;
1532         u32 cap_mask;
1533
1534         if (ret)
1535                 return ret;
1536         ret = -EINVAL;
1537
1538         if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1539                 p->mbus_code = 0;
1540
1541         mbus_code = p->mbus_code;
1542         memset_after(p, 0, type);
1543         p->mbus_code = mbus_code;
1544
1545         switch (p->type) {
1546         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1547         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1548                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1549                            V4L2_CAP_VIDEO_M2M_MPLANE;
1550                 if (!!(vdev->device_caps & cap_mask) !=
1551                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1552                         break;
1553
1554                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1555                         break;
1556                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1557                 break;
1558         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1559                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1560                         break;
1561                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1562                 break;
1563         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1564         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1565                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1566                            V4L2_CAP_VIDEO_M2M_MPLANE;
1567                 if (!!(vdev->device_caps & cap_mask) !=
1568                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1569                         break;
1570
1571                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1572                         break;
1573                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1574                 break;
1575         case V4L2_BUF_TYPE_SDR_CAPTURE:
1576                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1577                         break;
1578                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1579                 break;
1580         case V4L2_BUF_TYPE_SDR_OUTPUT:
1581                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1582                         break;
1583                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1584                 break;
1585         case V4L2_BUF_TYPE_META_CAPTURE:
1586                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1587                         break;
1588                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1589                 break;
1590         case V4L2_BUF_TYPE_META_OUTPUT:
1591                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1592                         break;
1593                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1594                 break;
1595         }
1596         if (ret == 0)
1597                 v4l_fill_fmtdesc(p);
1598         return ret;
1599 }
1600
1601 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1602 {
1603         /*
1604          * The v4l2_pix_format structure contains fields that make no sense for
1605          * touch. Set them to default values in this case.
1606          */
1607
1608         p->field = V4L2_FIELD_NONE;
1609         p->colorspace = V4L2_COLORSPACE_RAW;
1610         p->flags = 0;
1611         p->ycbcr_enc = 0;
1612         p->quantization = 0;
1613         p->xfer_func = 0;
1614 }
1615
1616 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1617                                 struct file *file, void *fh, void *arg)
1618 {
1619         struct v4l2_format *p = arg;
1620         struct video_device *vfd = video_devdata(file);
1621         int ret = check_fmt(file, p->type);
1622
1623         if (ret)
1624                 return ret;
1625
1626         memset(&p->fmt, 0, sizeof(p->fmt));
1627
1628         switch (p->type) {
1629         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1630                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1631                         break;
1632                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1633                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1634                 /* just in case the driver zeroed it again */
1635                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1636                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1637                         v4l_pix_format_touch(&p->fmt.pix);
1638                 return ret;
1639         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1640                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1641         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1642                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1643         case V4L2_BUF_TYPE_VBI_CAPTURE:
1644                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1645         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1646                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1647         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1648                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1649                         break;
1650                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1651                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1652                 /* just in case the driver zeroed it again */
1653                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1654                 return ret;
1655         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1656                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1657         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1658                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1659         case V4L2_BUF_TYPE_VBI_OUTPUT:
1660                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1661         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1662                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1663         case V4L2_BUF_TYPE_SDR_CAPTURE:
1664                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1665         case V4L2_BUF_TYPE_SDR_OUTPUT:
1666                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1667         case V4L2_BUF_TYPE_META_CAPTURE:
1668                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1669         case V4L2_BUF_TYPE_META_OUTPUT:
1670                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1671         }
1672         return -EINVAL;
1673 }
1674
1675 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1676                                 struct file *file, void *fh, void *arg)
1677 {
1678         struct v4l2_format *p = arg;
1679         struct video_device *vfd = video_devdata(file);
1680         int ret = check_fmt(file, p->type);
1681         unsigned int i;
1682
1683         if (ret)
1684                 return ret;
1685
1686         ret = v4l_enable_media_source(vfd);
1687         if (ret)
1688                 return ret;
1689         v4l_sanitize_format(p);
1690
1691         switch (p->type) {
1692         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1693                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1694                         break;
1695                 memset_after(p, 0, fmt.pix);
1696                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1697                 /* just in case the driver zeroed it again */
1698                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1699                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1700                         v4l_pix_format_touch(&p->fmt.pix);
1701                 return ret;
1702         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1703                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1704                         break;
1705                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1706                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1707                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1708                                      0, bytesperline);
1709                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1710         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1711                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1712                         break;
1713                 memset_after(p, 0, fmt.win);
1714                 p->fmt.win.clips = NULL;
1715                 p->fmt.win.clipcount = 0;
1716                 p->fmt.win.bitmap = NULL;
1717                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1718         case V4L2_BUF_TYPE_VBI_CAPTURE:
1719                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1720                         break;
1721                 memset_after(p, 0, fmt.vbi.flags);
1722                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1723         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1724                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1725                         break;
1726                 memset_after(p, 0, fmt.sliced.io_size);
1727                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1728         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1729                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1730                         break;
1731                 memset_after(p, 0, fmt.pix);
1732                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1733                 /* just in case the driver zeroed it again */
1734                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1735                 return ret;
1736         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1737                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1738                         break;
1739                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1740                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1741                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1742                                      0, bytesperline);
1743                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1744         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1745                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1746                         break;
1747                 memset_after(p, 0, fmt.win);
1748                 p->fmt.win.clips = NULL;
1749                 p->fmt.win.clipcount = 0;
1750                 p->fmt.win.bitmap = NULL;
1751                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1752         case V4L2_BUF_TYPE_VBI_OUTPUT:
1753                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1754                         break;
1755                 memset_after(p, 0, fmt.vbi.flags);
1756                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1757         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1758                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1759                         break;
1760                 memset_after(p, 0, fmt.sliced.io_size);
1761                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1762         case V4L2_BUF_TYPE_SDR_CAPTURE:
1763                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1764                         break;
1765                 memset_after(p, 0, fmt.sdr.buffersize);
1766                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1767         case V4L2_BUF_TYPE_SDR_OUTPUT:
1768                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1769                         break;
1770                 memset_after(p, 0, fmt.sdr.buffersize);
1771                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1772         case V4L2_BUF_TYPE_META_CAPTURE:
1773                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1774                         break;
1775                 memset_after(p, 0, fmt.meta);
1776                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1777         case V4L2_BUF_TYPE_META_OUTPUT:
1778                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1779                         break;
1780                 memset_after(p, 0, fmt.meta);
1781                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1782         }
1783         return -EINVAL;
1784 }
1785
1786 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1787                                 struct file *file, void *fh, void *arg)
1788 {
1789         struct v4l2_format *p = arg;
1790         struct video_device *vfd = video_devdata(file);
1791         int ret = check_fmt(file, p->type);
1792         unsigned int i;
1793
1794         if (ret)
1795                 return ret;
1796
1797         v4l_sanitize_format(p);
1798
1799         switch (p->type) {
1800         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1801                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1802                         break;
1803                 memset_after(p, 0, fmt.pix);
1804                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1805                 /* just in case the driver zeroed it again */
1806                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1807                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1808                         v4l_pix_format_touch(&p->fmt.pix);
1809                 return ret;
1810         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1811                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1812                         break;
1813                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1814                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1815                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1816                                      0, bytesperline);
1817                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1818         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1819                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1820                         break;
1821                 memset_after(p, 0, fmt.win);
1822                 p->fmt.win.clips = NULL;
1823                 p->fmt.win.clipcount = 0;
1824                 p->fmt.win.bitmap = NULL;
1825                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1826         case V4L2_BUF_TYPE_VBI_CAPTURE:
1827                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1828                         break;
1829                 memset_after(p, 0, fmt.vbi.flags);
1830                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1831         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1832                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1833                         break;
1834                 memset_after(p, 0, fmt.sliced.io_size);
1835                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1836         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1837                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1838                         break;
1839                 memset_after(p, 0, fmt.pix);
1840                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1841                 /* just in case the driver zeroed it again */
1842                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1843                 return ret;
1844         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1845                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1846                         break;
1847                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1848                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1849                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1850                                      0, bytesperline);
1851                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1852         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1853                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1854                         break;
1855                 memset_after(p, 0, fmt.win);
1856                 p->fmt.win.clips = NULL;
1857                 p->fmt.win.clipcount = 0;
1858                 p->fmt.win.bitmap = NULL;
1859                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1860         case V4L2_BUF_TYPE_VBI_OUTPUT:
1861                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1862                         break;
1863                 memset_after(p, 0, fmt.vbi.flags);
1864                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1865         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1866                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1867                         break;
1868                 memset_after(p, 0, fmt.sliced.io_size);
1869                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1870         case V4L2_BUF_TYPE_SDR_CAPTURE:
1871                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1872                         break;
1873                 memset_after(p, 0, fmt.sdr.buffersize);
1874                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1875         case V4L2_BUF_TYPE_SDR_OUTPUT:
1876                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1877                         break;
1878                 memset_after(p, 0, fmt.sdr.buffersize);
1879                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1880         case V4L2_BUF_TYPE_META_CAPTURE:
1881                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1882                         break;
1883                 memset_after(p, 0, fmt.meta);
1884                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1885         case V4L2_BUF_TYPE_META_OUTPUT:
1886                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1887                         break;
1888                 memset_after(p, 0, fmt.meta);
1889                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1890         }
1891         return -EINVAL;
1892 }
1893
1894 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1895                                 struct file *file, void *fh, void *arg)
1896 {
1897         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1898 }
1899
1900 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1901                                 struct file *file, void *fh, void *arg)
1902 {
1903         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1904 }
1905
1906 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1907                                 struct file *file, void *fh, void *arg)
1908 {
1909         struct video_device *vfd = video_devdata(file);
1910         struct v4l2_tuner *p = arg;
1911         int err;
1912
1913         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1914                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1915         err = ops->vidioc_g_tuner(file, fh, p);
1916         if (!err)
1917                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1918         return err;
1919 }
1920
1921 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1922                                 struct file *file, void *fh, void *arg)
1923 {
1924         struct video_device *vfd = video_devdata(file);
1925         struct v4l2_tuner *p = arg;
1926         int ret;
1927
1928         ret = v4l_enable_media_source(vfd);
1929         if (ret)
1930                 return ret;
1931         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1932                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1933         return ops->vidioc_s_tuner(file, fh, p);
1934 }
1935
1936 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1937                                 struct file *file, void *fh, void *arg)
1938 {
1939         struct video_device *vfd = video_devdata(file);
1940         struct v4l2_modulator *p = arg;
1941         int err;
1942
1943         if (vfd->vfl_type == VFL_TYPE_RADIO)
1944                 p->type = V4L2_TUNER_RADIO;
1945
1946         err = ops->vidioc_g_modulator(file, fh, p);
1947         if (!err)
1948                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1949         return err;
1950 }
1951
1952 static int v4l_s_modulator(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_modulator *p = arg;
1957
1958         if (vfd->vfl_type == VFL_TYPE_RADIO)
1959                 p->type = V4L2_TUNER_RADIO;
1960
1961         return ops->vidioc_s_modulator(file, fh, p);
1962 }
1963
1964 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1965                                 struct file *file, void *fh, void *arg)
1966 {
1967         struct video_device *vfd = video_devdata(file);
1968         struct v4l2_frequency *p = arg;
1969
1970         if (vfd->vfl_type == VFL_TYPE_SDR)
1971                 p->type = V4L2_TUNER_SDR;
1972         else
1973                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1974                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1975         return ops->vidioc_g_frequency(file, fh, p);
1976 }
1977
1978 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1979                                 struct file *file, void *fh, void *arg)
1980 {
1981         struct video_device *vfd = video_devdata(file);
1982         const struct v4l2_frequency *p = arg;
1983         enum v4l2_tuner_type type;
1984         int ret;
1985
1986         ret = v4l_enable_media_source(vfd);
1987         if (ret)
1988                 return ret;
1989         if (vfd->vfl_type == VFL_TYPE_SDR) {
1990                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1991                         return -EINVAL;
1992         } else {
1993                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1994                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1995                 if (type != p->type)
1996                         return -EINVAL;
1997         }
1998         return ops->vidioc_s_frequency(file, fh, p);
1999 }
2000
2001 static int v4l_enumstd(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_standard *p = arg;
2006
2007         return v4l_video_std_enumstd(p, vfd->tvnorms);
2008 }
2009
2010 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
2011                                 struct file *file, void *fh, void *arg)
2012 {
2013         struct video_device *vfd = video_devdata(file);
2014         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
2015         int ret;
2016
2017         ret = v4l_enable_media_source(vfd);
2018         if (ret)
2019                 return ret;
2020         norm = id & vfd->tvnorms;
2021         if (vfd->tvnorms && !norm)      /* Check if std is supported */
2022                 return -EINVAL;
2023
2024         /* Calls the specific handler */
2025         return ops->vidioc_s_std(file, fh, norm);
2026 }
2027
2028 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
2029                                 struct file *file, void *fh, void *arg)
2030 {
2031         struct video_device *vfd = video_devdata(file);
2032         v4l2_std_id *p = arg;
2033         int ret;
2034
2035         ret = v4l_enable_media_source(vfd);
2036         if (ret)
2037                 return ret;
2038         /*
2039          * If no signal is detected, then the driver should return
2040          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
2041          * any standards that do not apply removed.
2042          *
2043          * This means that tuners, audio and video decoders can join
2044          * their efforts to improve the standards detection.
2045          */
2046         *p = vfd->tvnorms;
2047         return ops->vidioc_querystd(file, fh, arg);
2048 }
2049
2050 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2051                                 struct file *file, void *fh, void *arg)
2052 {
2053         struct video_device *vfd = video_devdata(file);
2054         struct v4l2_hw_freq_seek *p = arg;
2055         enum v4l2_tuner_type type;
2056         int ret;
2057
2058         ret = v4l_enable_media_source(vfd);
2059         if (ret)
2060                 return ret;
2061         /* s_hw_freq_seek is not supported for SDR for now */
2062         if (vfd->vfl_type == VFL_TYPE_SDR)
2063                 return -EINVAL;
2064
2065         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2066                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2067         if (p->type != type)
2068                 return -EINVAL;
2069         return ops->vidioc_s_hw_freq_seek(file, fh, p);
2070 }
2071
2072 static int v4l_s_fbuf(const struct v4l2_ioctl_ops *ops,
2073                       struct file *file, void *fh, void *arg)
2074 {
2075         struct v4l2_framebuffer *p = arg;
2076
2077         p->base = NULL;
2078         return ops->vidioc_s_fbuf(file, fh, p);
2079 }
2080
2081 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2082                                 struct file *file, void *fh, void *arg)
2083 {
2084         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2085 }
2086
2087 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2088                                 struct file *file, void *fh, void *arg)
2089 {
2090         struct v4l2_requestbuffers *p = arg;
2091         int ret = check_fmt(file, p->type);
2092
2093         if (ret)
2094                 return ret;
2095
2096         memset_after(p, 0, flags);
2097
2098         return ops->vidioc_reqbufs(file, fh, p);
2099 }
2100
2101 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2102                                 struct file *file, void *fh, void *arg)
2103 {
2104         struct v4l2_buffer *p = arg;
2105         int ret = check_fmt(file, p->type);
2106
2107         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2108 }
2109
2110 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2111                                 struct file *file, void *fh, void *arg)
2112 {
2113         struct v4l2_buffer *p = arg;
2114         int ret = check_fmt(file, p->type);
2115
2116         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2117 }
2118
2119 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2120                                 struct file *file, void *fh, void *arg)
2121 {
2122         struct v4l2_buffer *p = arg;
2123         int ret = check_fmt(file, p->type);
2124
2125         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2126 }
2127
2128 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2129                                 struct file *file, void *fh, void *arg)
2130 {
2131         struct v4l2_create_buffers *create = arg;
2132         int ret = check_fmt(file, create->format.type);
2133
2134         if (ret)
2135                 return ret;
2136
2137         memset_after(create, 0, flags);
2138
2139         v4l_sanitize_format(&create->format);
2140
2141         ret = ops->vidioc_create_bufs(file, fh, create);
2142
2143         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2144             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2145                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2146
2147         return ret;
2148 }
2149
2150 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2151                                 struct file *file, void *fh, void *arg)
2152 {
2153         struct v4l2_buffer *b = arg;
2154         int ret = check_fmt(file, b->type);
2155
2156         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2157 }
2158
2159 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2160                                 struct file *file, void *fh, void *arg)
2161 {
2162         struct video_device *vfd = video_devdata(file);
2163         struct v4l2_streamparm *p = arg;
2164         v4l2_std_id std;
2165         int ret = check_fmt(file, p->type);
2166
2167         if (ret)
2168                 return ret;
2169         if (ops->vidioc_g_parm)
2170                 return ops->vidioc_g_parm(file, fh, p);
2171         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2172             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2173                 return -EINVAL;
2174         if (vfd->device_caps & V4L2_CAP_READWRITE)
2175                 p->parm.capture.readbuffers = 2;
2176         ret = ops->vidioc_g_std(file, fh, &std);
2177         if (ret == 0)
2178                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2179         return ret;
2180 }
2181
2182 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2183                                 struct file *file, void *fh, void *arg)
2184 {
2185         struct v4l2_streamparm *p = arg;
2186         int ret = check_fmt(file, p->type);
2187
2188         if (ret)
2189                 return ret;
2190
2191         /* Note: extendedmode is never used in drivers */
2192         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2193                 memset(p->parm.output.reserved, 0,
2194                        sizeof(p->parm.output.reserved));
2195                 p->parm.output.extendedmode = 0;
2196                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2197         } else {
2198                 memset(p->parm.capture.reserved, 0,
2199                        sizeof(p->parm.capture.reserved));
2200                 p->parm.capture.extendedmode = 0;
2201                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2202         }
2203         return ops->vidioc_s_parm(file, fh, p);
2204 }
2205
2206 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2207                                 struct file *file, void *fh, void *arg)
2208 {
2209         struct video_device *vfd = video_devdata(file);
2210         struct v4l2_queryctrl *p = arg;
2211         struct v4l2_fh *vfh =
2212                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2213
2214         if (vfh && vfh->ctrl_handler)
2215                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2216         if (vfd->ctrl_handler)
2217                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2218         if (ops->vidioc_queryctrl)
2219                 return ops->vidioc_queryctrl(file, fh, p);
2220         return -ENOTTY;
2221 }
2222
2223 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2224                                 struct file *file, void *fh, void *arg)
2225 {
2226         struct video_device *vfd = video_devdata(file);
2227         struct v4l2_query_ext_ctrl *p = arg;
2228         struct v4l2_fh *vfh =
2229                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2230
2231         if (vfh && vfh->ctrl_handler)
2232                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2233         if (vfd->ctrl_handler)
2234                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2235         if (ops->vidioc_query_ext_ctrl)
2236                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2237         return -ENOTTY;
2238 }
2239
2240 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2241                                 struct file *file, void *fh, void *arg)
2242 {
2243         struct video_device *vfd = video_devdata(file);
2244         struct v4l2_querymenu *p = arg;
2245         struct v4l2_fh *vfh =
2246                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2247
2248         if (vfh && vfh->ctrl_handler)
2249                 return v4l2_querymenu(vfh->ctrl_handler, p);
2250         if (vfd->ctrl_handler)
2251                 return v4l2_querymenu(vfd->ctrl_handler, p);
2252         if (ops->vidioc_querymenu)
2253                 return ops->vidioc_querymenu(file, fh, p);
2254         return -ENOTTY;
2255 }
2256
2257 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2258                                 struct file *file, void *fh, void *arg)
2259 {
2260         struct video_device *vfd = video_devdata(file);
2261         struct v4l2_control *p = arg;
2262         struct v4l2_fh *vfh =
2263                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2264         struct v4l2_ext_controls ctrls;
2265         struct v4l2_ext_control ctrl;
2266
2267         if (vfh && vfh->ctrl_handler)
2268                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2269         if (vfd->ctrl_handler)
2270                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2271         if (ops->vidioc_g_ctrl)
2272                 return ops->vidioc_g_ctrl(file, fh, p);
2273         if (ops->vidioc_g_ext_ctrls == NULL)
2274                 return -ENOTTY;
2275
2276         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2277         ctrls.count = 1;
2278         ctrls.controls = &ctrl;
2279         ctrl.id = p->id;
2280         ctrl.value = p->value;
2281         if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
2282                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2283
2284                 if (ret == 0)
2285                         p->value = ctrl.value;
2286                 return ret;
2287         }
2288         return -EINVAL;
2289 }
2290
2291 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2292                                 struct file *file, void *fh, void *arg)
2293 {
2294         struct video_device *vfd = video_devdata(file);
2295         struct v4l2_control *p = arg;
2296         struct v4l2_fh *vfh =
2297                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2298         struct v4l2_ext_controls ctrls;
2299         struct v4l2_ext_control ctrl;
2300         int ret;
2301
2302         if (vfh && vfh->ctrl_handler)
2303                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2304         if (vfd->ctrl_handler)
2305                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2306         if (ops->vidioc_s_ctrl)
2307                 return ops->vidioc_s_ctrl(file, fh, p);
2308         if (ops->vidioc_s_ext_ctrls == NULL)
2309                 return -ENOTTY;
2310
2311         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2312         ctrls.count = 1;
2313         ctrls.controls = &ctrl;
2314         ctrl.id = p->id;
2315         ctrl.value = p->value;
2316         if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
2317                 return -EINVAL;
2318         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2319         p->value = ctrl.value;
2320         return ret;
2321 }
2322
2323 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2324                                 struct file *file, void *fh, void *arg)
2325 {
2326         struct video_device *vfd = video_devdata(file);
2327         struct v4l2_ext_controls *p = arg;
2328         struct v4l2_fh *vfh =
2329                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2330
2331         p->error_idx = p->count;
2332         if (vfh && vfh->ctrl_handler)
2333                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2334                                         vfd, vfd->v4l2_dev->mdev, p);
2335         if (vfd->ctrl_handler)
2336                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2337                                         vfd, vfd->v4l2_dev->mdev, p);
2338         if (ops->vidioc_g_ext_ctrls == NULL)
2339                 return -ENOTTY;
2340         return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
2341                                 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2342 }
2343
2344 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2345                                 struct file *file, void *fh, void *arg)
2346 {
2347         struct video_device *vfd = video_devdata(file);
2348         struct v4l2_ext_controls *p = arg;
2349         struct v4l2_fh *vfh =
2350                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2351
2352         p->error_idx = p->count;
2353         if (vfh && vfh->ctrl_handler)
2354                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2355                                         vfd, vfd->v4l2_dev->mdev, p);
2356         if (vfd->ctrl_handler)
2357                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2358                                         vfd, vfd->v4l2_dev->mdev, p);
2359         if (ops->vidioc_s_ext_ctrls == NULL)
2360                 return -ENOTTY;
2361         return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
2362                                 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2363 }
2364
2365 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2366                                 struct file *file, void *fh, void *arg)
2367 {
2368         struct video_device *vfd = video_devdata(file);
2369         struct v4l2_ext_controls *p = arg;
2370         struct v4l2_fh *vfh =
2371                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2372
2373         p->error_idx = p->count;
2374         if (vfh && vfh->ctrl_handler)
2375                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2376                                           vfd, vfd->v4l2_dev->mdev, p);
2377         if (vfd->ctrl_handler)
2378                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2379                                           vfd, vfd->v4l2_dev->mdev, p);
2380         if (ops->vidioc_try_ext_ctrls == NULL)
2381                 return -ENOTTY;
2382         return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
2383                         ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2384 }
2385
2386 /*
2387  * The selection API specified originally that the _MPLANE buffer types
2388  * shouldn't be used. The reasons for this are lost in the mists of time
2389  * (or just really crappy memories). Regardless, this is really annoying
2390  * for userspace. So to keep things simple we map _MPLANE buffer types
2391  * to their 'regular' counterparts before calling the driver. And we
2392  * restore it afterwards. This way applications can use either buffer
2393  * type and drivers don't need to check for both.
2394  */
2395 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2396                            struct file *file, void *fh, void *arg)
2397 {
2398         struct v4l2_selection *p = arg;
2399         u32 old_type = p->type;
2400         int ret;
2401
2402         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2403                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2404         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2405                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2406         ret = ops->vidioc_g_selection(file, fh, p);
2407         p->type = old_type;
2408         return ret;
2409 }
2410
2411 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2412                            struct file *file, void *fh, void *arg)
2413 {
2414         struct v4l2_selection *p = arg;
2415         u32 old_type = p->type;
2416         int ret;
2417
2418         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2419                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2420         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2421                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2422         ret = ops->vidioc_s_selection(file, fh, p);
2423         p->type = old_type;
2424         return ret;
2425 }
2426
2427 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2428                                 struct file *file, void *fh, void *arg)
2429 {
2430         struct video_device *vfd = video_devdata(file);
2431         struct v4l2_crop *p = arg;
2432         struct v4l2_selection s = {
2433                 .type = p->type,
2434         };
2435         int ret;
2436
2437         /* simulate capture crop using selection api */
2438
2439         /* crop means compose for output devices */
2440         if (V4L2_TYPE_IS_OUTPUT(p->type))
2441                 s.target = V4L2_SEL_TGT_COMPOSE;
2442         else
2443                 s.target = V4L2_SEL_TGT_CROP;
2444
2445         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2446                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2447                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2448
2449         ret = v4l_g_selection(ops, file, fh, &s);
2450
2451         /* copying results to old structure on success */
2452         if (!ret)
2453                 p->c = s.r;
2454         return ret;
2455 }
2456
2457 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2458                                 struct file *file, void *fh, void *arg)
2459 {
2460         struct video_device *vfd = video_devdata(file);
2461         struct v4l2_crop *p = arg;
2462         struct v4l2_selection s = {
2463                 .type = p->type,
2464                 .r = p->c,
2465         };
2466
2467         /* simulate capture crop using selection api */
2468
2469         /* crop means compose for output devices */
2470         if (V4L2_TYPE_IS_OUTPUT(p->type))
2471                 s.target = V4L2_SEL_TGT_COMPOSE;
2472         else
2473                 s.target = V4L2_SEL_TGT_CROP;
2474
2475         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2476                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2477                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2478
2479         return v4l_s_selection(ops, file, fh, &s);
2480 }
2481
2482 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2483                                 struct file *file, void *fh, void *arg)
2484 {
2485         struct video_device *vfd = video_devdata(file);
2486         struct v4l2_cropcap *p = arg;
2487         struct v4l2_selection s = { .type = p->type };
2488         int ret = 0;
2489
2490         /* setting trivial pixelaspect */
2491         p->pixelaspect.numerator = 1;
2492         p->pixelaspect.denominator = 1;
2493
2494         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2495                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2496         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2497                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2498
2499         /*
2500          * The determine_valid_ioctls() call already should ensure
2501          * that this can never happen, but just in case...
2502          */
2503         if (WARN_ON(!ops->vidioc_g_selection))
2504                 return -ENOTTY;
2505
2506         if (ops->vidioc_g_pixelaspect)
2507                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2508                                                 &p->pixelaspect);
2509
2510         /*
2511          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2512          * square pixel aspect ratio in that case.
2513          */
2514         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2515                 return ret;
2516
2517         /* Use g_selection() to fill in the bounds and defrect rectangles */
2518
2519         /* obtaining bounds */
2520         if (V4L2_TYPE_IS_OUTPUT(p->type))
2521                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2522         else
2523                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2524
2525         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2526                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2527                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2528
2529         ret = v4l_g_selection(ops, file, fh, &s);
2530         if (ret)
2531                 return ret;
2532         p->bounds = s.r;
2533
2534         /* obtaining defrect */
2535         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2536                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2537         else
2538                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2539
2540         ret = v4l_g_selection(ops, file, fh, &s);
2541         if (ret)
2542                 return ret;
2543         p->defrect = s.r;
2544
2545         return 0;
2546 }
2547
2548 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2549                                 struct file *file, void *fh, void *arg)
2550 {
2551         struct video_device *vfd = video_devdata(file);
2552         int ret;
2553
2554         if (vfd->v4l2_dev)
2555                 pr_info("%s: =================  START STATUS  =================\n",
2556                         vfd->v4l2_dev->name);
2557         ret = ops->vidioc_log_status(file, fh);
2558         if (vfd->v4l2_dev)
2559                 pr_info("%s: ==================  END STATUS  ==================\n",
2560                         vfd->v4l2_dev->name);
2561         return ret;
2562 }
2563
2564 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2565                                 struct file *file, void *fh, void *arg)
2566 {
2567 #ifdef CONFIG_VIDEO_ADV_DEBUG
2568         struct v4l2_dbg_register *p = arg;
2569         struct video_device *vfd = video_devdata(file);
2570         struct v4l2_subdev *sd;
2571         int idx = 0;
2572
2573         if (!capable(CAP_SYS_ADMIN))
2574                 return -EPERM;
2575         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2576                 if (vfd->v4l2_dev == NULL)
2577                         return -EINVAL;
2578                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2579                         if (p->match.addr == idx++)
2580                                 return v4l2_subdev_call(sd, core, g_register, p);
2581                 return -EINVAL;
2582         }
2583         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2584             (ops->vidioc_g_chip_info || p->match.addr == 0))
2585                 return ops->vidioc_g_register(file, fh, p);
2586         return -EINVAL;
2587 #else
2588         return -ENOTTY;
2589 #endif
2590 }
2591
2592 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2593                                 struct file *file, void *fh, void *arg)
2594 {
2595 #ifdef CONFIG_VIDEO_ADV_DEBUG
2596         const struct v4l2_dbg_register *p = arg;
2597         struct video_device *vfd = video_devdata(file);
2598         struct v4l2_subdev *sd;
2599         int idx = 0;
2600
2601         if (!capable(CAP_SYS_ADMIN))
2602                 return -EPERM;
2603         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2604                 if (vfd->v4l2_dev == NULL)
2605                         return -EINVAL;
2606                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2607                         if (p->match.addr == idx++)
2608                                 return v4l2_subdev_call(sd, core, s_register, p);
2609                 return -EINVAL;
2610         }
2611         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2612             (ops->vidioc_g_chip_info || p->match.addr == 0))
2613                 return ops->vidioc_s_register(file, fh, p);
2614         return -EINVAL;
2615 #else
2616         return -ENOTTY;
2617 #endif
2618 }
2619
2620 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2621                                 struct file *file, void *fh, void *arg)
2622 {
2623 #ifdef CONFIG_VIDEO_ADV_DEBUG
2624         struct video_device *vfd = video_devdata(file);
2625         struct v4l2_dbg_chip_info *p = arg;
2626         struct v4l2_subdev *sd;
2627         int idx = 0;
2628
2629         switch (p->match.type) {
2630         case V4L2_CHIP_MATCH_BRIDGE:
2631                 if (ops->vidioc_s_register)
2632                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2633                 if (ops->vidioc_g_register)
2634                         p->flags |= V4L2_CHIP_FL_READABLE;
2635                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2636                 if (ops->vidioc_g_chip_info)
2637                         return ops->vidioc_g_chip_info(file, fh, arg);
2638                 if (p->match.addr)
2639                         return -EINVAL;
2640                 return 0;
2641
2642         case V4L2_CHIP_MATCH_SUBDEV:
2643                 if (vfd->v4l2_dev == NULL)
2644                         break;
2645                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2646                         if (p->match.addr != idx++)
2647                                 continue;
2648                         if (sd->ops->core && sd->ops->core->s_register)
2649                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2650                         if (sd->ops->core && sd->ops->core->g_register)
2651                                 p->flags |= V4L2_CHIP_FL_READABLE;
2652                         strscpy(p->name, sd->name, sizeof(p->name));
2653                         return 0;
2654                 }
2655                 break;
2656         }
2657         return -EINVAL;
2658 #else
2659         return -ENOTTY;
2660 #endif
2661 }
2662
2663 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2664                                 struct file *file, void *fh, void *arg)
2665 {
2666         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2667 }
2668
2669 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2670                                 struct file *file, void *fh, void *arg)
2671 {
2672         return ops->vidioc_subscribe_event(fh, arg);
2673 }
2674
2675 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2676                                 struct file *file, void *fh, void *arg)
2677 {
2678         return ops->vidioc_unsubscribe_event(fh, arg);
2679 }
2680
2681 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2682                                 struct file *file, void *fh, void *arg)
2683 {
2684         struct v4l2_sliced_vbi_cap *p = arg;
2685         int ret = check_fmt(file, p->type);
2686
2687         if (ret)
2688                 return ret;
2689
2690         /* Clear up to type, everything after type is zeroed already */
2691         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2692
2693         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2694 }
2695
2696 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2697                                 struct file *file, void *fh, void *arg)
2698 {
2699         struct video_device *vfd = video_devdata(file);
2700         struct v4l2_frequency_band *p = arg;
2701         enum v4l2_tuner_type type;
2702         int err;
2703
2704         if (vfd->vfl_type == VFL_TYPE_SDR) {
2705                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2706                         return -EINVAL;
2707                 type = p->type;
2708         } else {
2709                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2710                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2711                 if (type != p->type)
2712                         return -EINVAL;
2713         }
2714         if (ops->vidioc_enum_freq_bands) {
2715                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2716                 if (err != -ENOTTY)
2717                         return err;
2718         }
2719         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2720                 struct v4l2_tuner t = {
2721                         .index = p->tuner,
2722                         .type = type,
2723                 };
2724
2725                 if (p->index)
2726                         return -EINVAL;
2727                 err = ops->vidioc_g_tuner(file, fh, &t);
2728                 if (err)
2729                         return err;
2730                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2731                 p->rangelow = t.rangelow;
2732                 p->rangehigh = t.rangehigh;
2733                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2734                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2735                 return 0;
2736         }
2737         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2738                 struct v4l2_modulator m = {
2739                         .index = p->tuner,
2740                 };
2741
2742                 if (type != V4L2_TUNER_RADIO)
2743                         return -EINVAL;
2744                 if (p->index)
2745                         return -EINVAL;
2746                 err = ops->vidioc_g_modulator(file, fh, &m);
2747                 if (err)
2748                         return err;
2749                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2750                 p->rangelow = m.rangelow;
2751                 p->rangehigh = m.rangehigh;
2752                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2753                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2754                 return 0;
2755         }
2756         return -ENOTTY;
2757 }
2758
2759 struct v4l2_ioctl_info {
2760         unsigned int ioctl;
2761         u32 flags;
2762         const char * const name;
2763         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2764                     void *fh, void *p);
2765         void (*debug)(const void *arg, bool write_only);
2766 };
2767
2768 /* This control needs a priority check */
2769 #define INFO_FL_PRIO            (1 << 0)
2770 /* This control can be valid if the filehandle passes a control handler. */
2771 #define INFO_FL_CTRL            (1 << 1)
2772 /* Queuing ioctl */
2773 #define INFO_FL_QUEUE           (1 << 2)
2774 /* Always copy back result, even on error */
2775 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2776 /* Zero struct from after the field to the end */
2777 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2778         ((offsetof(struct v4l2_struct, field) +                 \
2779           sizeof_field(struct v4l2_struct, field)) << 16)
2780 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2781
2782 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2783         static int v4l_stub_ ## _vidioc(                        \
2784                         const struct v4l2_ioctl_ops *ops,       \
2785                         struct file *file, void *fh, void *p)   \
2786         {                                                       \
2787                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2788         }
2789
2790 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2791         [_IOC_NR(_ioctl)] = {                                   \
2792                 .ioctl = _ioctl,                                \
2793                 .flags = _flags,                                \
2794                 .name = #_ioctl,                                \
2795                 .func = _func,                                  \
2796                 .debug = _debug,                                \
2797         }
2798
2799 DEFINE_V4L_STUB_FUNC(g_fbuf)
2800 DEFINE_V4L_STUB_FUNC(expbuf)
2801 DEFINE_V4L_STUB_FUNC(g_std)
2802 DEFINE_V4L_STUB_FUNC(g_audio)
2803 DEFINE_V4L_STUB_FUNC(s_audio)
2804 DEFINE_V4L_STUB_FUNC(g_edid)
2805 DEFINE_V4L_STUB_FUNC(s_edid)
2806 DEFINE_V4L_STUB_FUNC(g_audout)
2807 DEFINE_V4L_STUB_FUNC(s_audout)
2808 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2809 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2810 DEFINE_V4L_STUB_FUNC(enumaudio)
2811 DEFINE_V4L_STUB_FUNC(enumaudout)
2812 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2813 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2814 DEFINE_V4L_STUB_FUNC(g_enc_index)
2815 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2816 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2817 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2818 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2819 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2820 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2821 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2822 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2823 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2824
2825 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2826         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2827         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2828         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2829         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2830         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2831         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2832         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2833         IOCTL_INFO(VIDIOC_S_FBUF, v4l_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2834         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2835         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2836         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2837         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2838         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2839         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2840         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2841         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2842         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2843         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2844         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2845         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2846         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2847         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2848         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2849         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2850         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2851         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2852         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2853         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2854         IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2855         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2856         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2857         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2858         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2859         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2860         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2861         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2862         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2863         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2864         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2865         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2866         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2867         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2868         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2869         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2870         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2871         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2872         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2873         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2874         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2875         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2876         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2877         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2878         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2879         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2880         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)),
2881         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2882         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2883         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2884         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2885         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2886         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2887         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2888         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2889         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2890         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2891         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2892         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2893         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2894         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2895         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)),
2896         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2897         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2898         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2899         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2900         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2901         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2902         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2903         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2904         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2905         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2906         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)),
2907         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)),
2908 };
2909 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2910
2911 static bool v4l2_is_known_ioctl(unsigned int cmd)
2912 {
2913         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2914                 return false;
2915         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2916 }
2917
2918 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2919                                          struct v4l2_fh *vfh, unsigned int cmd,
2920                                          void *arg)
2921 {
2922         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2923                 return vdev->lock;
2924         if (vfh && vfh->m2m_ctx &&
2925             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2926                 if (vfh->m2m_ctx->q_lock)
2927                         return vfh->m2m_ctx->q_lock;
2928         }
2929         if (vdev->queue && vdev->queue->lock &&
2930                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2931                 return vdev->queue->lock;
2932         return vdev->lock;
2933 }
2934
2935 /* Common ioctl debug function. This function can be used by
2936    external ioctl messages as well as internal V4L ioctl */
2937 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2938 {
2939         const char *dir, *type;
2940
2941         if (prefix)
2942                 printk(KERN_DEBUG "%s: ", prefix);
2943
2944         switch (_IOC_TYPE(cmd)) {
2945         case 'd':
2946                 type = "v4l2_int";
2947                 break;
2948         case 'V':
2949                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2950                         type = "v4l2";
2951                         break;
2952                 }
2953                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2954                 return;
2955         default:
2956                 type = "unknown";
2957                 break;
2958         }
2959
2960         switch (_IOC_DIR(cmd)) {
2961         case _IOC_NONE:              dir = "--"; break;
2962         case _IOC_READ:              dir = "r-"; break;
2963         case _IOC_WRITE:             dir = "-w"; break;
2964         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2965         default:                     dir = "*ERR*"; break;
2966         }
2967         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2968                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2969 }
2970 EXPORT_SYMBOL(v4l_printk_ioctl);
2971
2972 static long __video_do_ioctl(struct file *file,
2973                 unsigned int cmd, void *arg)
2974 {
2975         struct video_device *vfd = video_devdata(file);
2976         struct mutex *req_queue_lock = NULL;
2977         struct mutex *lock; /* ioctl serialization mutex */
2978         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2979         bool write_only = false;
2980         struct v4l2_ioctl_info default_info;
2981         const struct v4l2_ioctl_info *info;
2982         void *fh = file->private_data;
2983         struct v4l2_fh *vfh = NULL;
2984         int dev_debug = vfd->dev_debug;
2985         long ret = -ENOTTY;
2986
2987         if (ops == NULL) {
2988                 pr_warn("%s: has no ioctl_ops.\n",
2989                                 video_device_node_name(vfd));
2990                 return ret;
2991         }
2992
2993         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2994                 vfh = file->private_data;
2995
2996         /*
2997          * We need to serialize streamon/off with queueing new requests.
2998          * These ioctls may trigger the cancellation of a streaming
2999          * operation, and that should not be mixed with queueing a new
3000          * request at the same time.
3001          */
3002         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
3003             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
3004                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
3005
3006                 if (mutex_lock_interruptible(req_queue_lock))
3007                         return -ERESTARTSYS;
3008         }
3009
3010         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
3011
3012         if (lock && mutex_lock_interruptible(lock)) {
3013                 if (req_queue_lock)
3014                         mutex_unlock(req_queue_lock);
3015                 return -ERESTARTSYS;
3016         }
3017
3018         if (!video_is_registered(vfd)) {
3019                 ret = -ENODEV;
3020                 goto unlock;
3021         }
3022
3023         if (v4l2_is_known_ioctl(cmd)) {
3024                 info = &v4l2_ioctls[_IOC_NR(cmd)];
3025
3026                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
3027                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
3028                         goto done;
3029
3030                 if (vfh && (info->flags & INFO_FL_PRIO)) {
3031                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
3032                         if (ret)
3033                                 goto done;
3034                 }
3035         } else {
3036                 default_info.ioctl = cmd;
3037                 default_info.flags = 0;
3038                 default_info.debug = v4l_print_default;
3039                 info = &default_info;
3040         }
3041
3042         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
3043         if (info != &default_info) {
3044                 ret = info->func(ops, file, fh, arg);
3045         } else if (!ops->vidioc_default) {
3046                 ret = -ENOTTY;
3047         } else {
3048                 ret = ops->vidioc_default(file, fh,
3049                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
3050                         cmd, arg);
3051         }
3052
3053 done:
3054         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
3055                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3056                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3057                         goto unlock;
3058
3059                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3060                 if (ret < 0)
3061                         pr_cont(": error %ld", ret);
3062                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3063                         pr_cont("\n");
3064                 else if (_IOC_DIR(cmd) == _IOC_NONE)
3065                         info->debug(arg, write_only);
3066                 else {
3067                         pr_cont(": ");
3068                         info->debug(arg, write_only);
3069                 }
3070         }
3071
3072 unlock:
3073         if (lock)
3074                 mutex_unlock(lock);
3075         if (req_queue_lock)
3076                 mutex_unlock(req_queue_lock);
3077         return ret;
3078 }
3079
3080 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3081                             void __user **user_ptr, void ***kernel_ptr)
3082 {
3083         int ret = 0;
3084
3085         switch (cmd) {
3086         case VIDIOC_PREPARE_BUF:
3087         case VIDIOC_QUERYBUF:
3088         case VIDIOC_QBUF:
3089         case VIDIOC_DQBUF: {
3090                 struct v4l2_buffer *buf = parg;
3091
3092                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3093                         if (buf->length > VIDEO_MAX_PLANES) {
3094                                 ret = -EINVAL;
3095                                 break;
3096                         }
3097                         *user_ptr = (void __user *)buf->m.planes;
3098                         *kernel_ptr = (void **)&buf->m.planes;
3099                         *array_size = sizeof(struct v4l2_plane) * buf->length;
3100                         ret = 1;
3101                 }
3102                 break;
3103         }
3104
3105         case VIDIOC_G_EDID:
3106         case VIDIOC_S_EDID: {
3107                 struct v4l2_edid *edid = parg;
3108
3109                 if (edid->blocks) {
3110                         if (edid->blocks > 256) {
3111                                 ret = -EINVAL;
3112                                 break;
3113                         }
3114                         *user_ptr = (void __user *)edid->edid;
3115                         *kernel_ptr = (void **)&edid->edid;
3116                         *array_size = edid->blocks * 128;
3117                         ret = 1;
3118                 }
3119                 break;
3120         }
3121
3122         case VIDIOC_S_EXT_CTRLS:
3123         case VIDIOC_G_EXT_CTRLS:
3124         case VIDIOC_TRY_EXT_CTRLS: {
3125                 struct v4l2_ext_controls *ctrls = parg;
3126
3127                 if (ctrls->count != 0) {
3128                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3129                                 ret = -EINVAL;
3130                                 break;
3131                         }
3132                         *user_ptr = (void __user *)ctrls->controls;
3133                         *kernel_ptr = (void **)&ctrls->controls;
3134                         *array_size = sizeof(struct v4l2_ext_control)
3135                                     * ctrls->count;
3136                         ret = 1;
3137                 }
3138                 break;
3139         }
3140
3141         case VIDIOC_SUBDEV_G_ROUTING:
3142         case VIDIOC_SUBDEV_S_ROUTING: {
3143                 struct v4l2_subdev_routing *routing = parg;
3144
3145                 if (routing->num_routes > 256)
3146                         return -E2BIG;
3147
3148                 *user_ptr = u64_to_user_ptr(routing->routes);
3149                 *kernel_ptr = (void **)&routing->routes;
3150                 *array_size = sizeof(struct v4l2_subdev_route)
3151                             * routing->num_routes;
3152                 ret = 1;
3153                 break;
3154         }
3155         }
3156
3157         return ret;
3158 }
3159
3160 static unsigned int video_translate_cmd(unsigned int cmd)
3161 {
3162 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3163         switch (cmd) {
3164         case VIDIOC_DQEVENT_TIME32:
3165                 return VIDIOC_DQEVENT;
3166         case VIDIOC_QUERYBUF_TIME32:
3167                 return VIDIOC_QUERYBUF;
3168         case VIDIOC_QBUF_TIME32:
3169                 return VIDIOC_QBUF;
3170         case VIDIOC_DQBUF_TIME32:
3171                 return VIDIOC_DQBUF;
3172         case VIDIOC_PREPARE_BUF_TIME32:
3173                 return VIDIOC_PREPARE_BUF;
3174         }
3175 #endif
3176         if (in_compat_syscall())
3177                 return v4l2_compat_translate_cmd(cmd);
3178
3179         return cmd;
3180 }
3181
3182 static int video_get_user(void __user *arg, void *parg,
3183                           unsigned int real_cmd, unsigned int cmd,
3184                           bool *always_copy)
3185 {
3186         unsigned int n = _IOC_SIZE(real_cmd);
3187         int err = 0;
3188
3189         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3190                 /* read-only ioctl */
3191                 memset(parg, 0, n);
3192                 return 0;
3193         }
3194
3195         /*
3196          * In some cases, only a few fields are used as input,
3197          * i.e. when the app sets "index" and then the driver
3198          * fills in the rest of the structure for the thing
3199          * with that index.  We only need to copy up the first
3200          * non-input field.
3201          */
3202         if (v4l2_is_known_ioctl(real_cmd)) {
3203                 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3204
3205                 if (flags & INFO_FL_CLEAR_MASK)
3206                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3207                 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3208         }
3209
3210         if (cmd == real_cmd) {
3211                 if (copy_from_user(parg, (void __user *)arg, n))
3212                         err = -EFAULT;
3213         } else if (in_compat_syscall()) {
3214                 memset(parg, 0, n);
3215                 err = v4l2_compat_get_user(arg, parg, cmd);
3216         } else {
3217                 memset(parg, 0, n);
3218 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3219                 switch (cmd) {
3220                 case VIDIOC_QUERYBUF_TIME32:
3221                 case VIDIOC_QBUF_TIME32:
3222                 case VIDIOC_DQBUF_TIME32:
3223                 case VIDIOC_PREPARE_BUF_TIME32: {
3224                         struct v4l2_buffer_time32 vb32;
3225                         struct v4l2_buffer *vb = parg;
3226
3227                         if (copy_from_user(&vb32, arg, sizeof(vb32)))
3228                                 return -EFAULT;
3229
3230                         *vb = (struct v4l2_buffer) {
3231                                 .index          = vb32.index,
3232                                 .type           = vb32.type,
3233                                 .bytesused      = vb32.bytesused,
3234                                 .flags          = vb32.flags,
3235                                 .field          = vb32.field,
3236                                 .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3237                                 .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3238                                 .timecode       = vb32.timecode,
3239                                 .sequence       = vb32.sequence,
3240                                 .memory         = vb32.memory,
3241                                 .m.userptr      = vb32.m.userptr,
3242                                 .length         = vb32.length,
3243                                 .request_fd     = vb32.request_fd,
3244                         };
3245                         break;
3246                 }
3247                 }
3248 #endif
3249         }
3250
3251         /* zero out anything we don't copy from userspace */
3252         if (!err && n < _IOC_SIZE(real_cmd))
3253                 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3254         return err;
3255 }
3256
3257 static int video_put_user(void __user *arg, void *parg,
3258                           unsigned int real_cmd, unsigned int cmd)
3259 {
3260         if (!(_IOC_DIR(cmd) & _IOC_READ))
3261                 return 0;
3262
3263         if (cmd == real_cmd) {
3264                 /*  Copy results into user buffer  */
3265                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3266                         return -EFAULT;
3267                 return 0;
3268         }
3269
3270         if (in_compat_syscall())
3271                 return v4l2_compat_put_user(arg, parg, cmd);
3272
3273 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3274         switch (cmd) {
3275         case VIDIOC_DQEVENT_TIME32: {
3276                 struct v4l2_event *ev = parg;
3277                 struct v4l2_event_time32 ev32;
3278
3279                 memset(&ev32, 0, sizeof(ev32));
3280
3281                 ev32.type       = ev->type;
3282                 ev32.pending    = ev->pending;
3283                 ev32.sequence   = ev->sequence;
3284                 ev32.timestamp.tv_sec   = ev->timestamp.tv_sec;
3285                 ev32.timestamp.tv_nsec  = ev->timestamp.tv_nsec;
3286                 ev32.id         = ev->id;
3287
3288                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3289                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3290
3291                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3292                         return -EFAULT;
3293                 break;
3294         }
3295         case VIDIOC_QUERYBUF_TIME32:
3296         case VIDIOC_QBUF_TIME32:
3297         case VIDIOC_DQBUF_TIME32:
3298         case VIDIOC_PREPARE_BUF_TIME32: {
3299                 struct v4l2_buffer *vb = parg;
3300                 struct v4l2_buffer_time32 vb32;
3301
3302                 memset(&vb32, 0, sizeof(vb32));
3303
3304                 vb32.index      = vb->index;
3305                 vb32.type       = vb->type;
3306                 vb32.bytesused  = vb->bytesused;
3307                 vb32.flags      = vb->flags;
3308                 vb32.field      = vb->field;
3309                 vb32.timestamp.tv_sec   = vb->timestamp.tv_sec;
3310                 vb32.timestamp.tv_usec  = vb->timestamp.tv_usec;
3311                 vb32.timecode   = vb->timecode;
3312                 vb32.sequence   = vb->sequence;
3313                 vb32.memory     = vb->memory;
3314                 vb32.m.userptr  = vb->m.userptr;
3315                 vb32.length     = vb->length;
3316                 vb32.request_fd = vb->request_fd;
3317
3318                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3319                         return -EFAULT;
3320                 break;
3321         }
3322         }
3323 #endif
3324
3325         return 0;
3326 }
3327
3328 long
3329 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3330                v4l2_kioctl func)
3331 {
3332         char    sbuf[128];
3333         void    *mbuf = NULL, *array_buf = NULL;
3334         void    *parg = (void *)arg;
3335         long    err  = -EINVAL;
3336         bool    has_array_args;
3337         bool    always_copy = false;
3338         size_t  array_size = 0;
3339         void __user *user_ptr = NULL;
3340         void    **kernel_ptr = NULL;
3341         unsigned int cmd = video_translate_cmd(orig_cmd);
3342         const size_t ioc_size = _IOC_SIZE(cmd);
3343
3344         /*  Copy arguments into temp kernel buffer  */
3345         if (_IOC_DIR(cmd) != _IOC_NONE) {
3346                 if (ioc_size <= sizeof(sbuf)) {
3347                         parg = sbuf;
3348                 } else {
3349                         /* too big to allocate from stack */
3350                         mbuf = kmalloc(ioc_size, GFP_KERNEL);
3351                         if (NULL == mbuf)
3352                                 return -ENOMEM;
3353                         parg = mbuf;
3354                 }
3355
3356                 err = video_get_user((void __user *)arg, parg, cmd,
3357                                      orig_cmd, &always_copy);
3358                 if (err)
3359                         goto out;
3360         }
3361
3362         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3363         if (err < 0)
3364                 goto out;
3365         has_array_args = err;
3366
3367         if (has_array_args) {
3368                 array_buf = kvmalloc(array_size, GFP_KERNEL);
3369                 err = -ENOMEM;
3370                 if (array_buf == NULL)
3371                         goto out;
3372                 if (in_compat_syscall())
3373                         err = v4l2_compat_get_array_args(file, array_buf,
3374                                                          user_ptr, array_size,
3375                                                          orig_cmd, parg);
3376                 else
3377                         err = copy_from_user(array_buf, user_ptr, array_size) ?
3378                                                                 -EFAULT : 0;
3379                 if (err)
3380                         goto out;
3381                 *kernel_ptr = array_buf;
3382         }
3383
3384         /* Handles IOCTL */
3385         err = func(file, cmd, parg);
3386         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3387                 err = -ENOTTY;
3388                 goto out;
3389         }
3390
3391         if (err == 0) {
3392                 if (cmd == VIDIOC_DQBUF)
3393                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3394                 else if (cmd == VIDIOC_QBUF)
3395                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3396         }
3397
3398         /*
3399          * Some ioctls can return an error, but still have valid
3400          * results that must be returned.
3401          *
3402          * FIXME: subdev IOCTLS are partially handled here and partially in
3403          * v4l2-subdev.c and the 'always_copy' flag can only be set for IOCTLS
3404          * defined here as part of the 'v4l2_ioctls' array. As
3405          * VIDIOC_SUBDEV_G_ROUTING needs to return results to applications even
3406          * in case of failure, but it is not defined here as part of the
3407          * 'v4l2_ioctls' array, insert an ad-hoc check to address that.
3408          */
3409         if (err < 0 && !always_copy && cmd != VIDIOC_SUBDEV_G_ROUTING)
3410                 goto out;
3411
3412         if (has_array_args) {
3413                 *kernel_ptr = (void __force *)user_ptr;
3414                 if (in_compat_syscall()) {
3415                         int put_err;
3416
3417                         put_err = v4l2_compat_put_array_args(file, user_ptr,
3418                                                              array_buf,
3419                                                              array_size,
3420                                                              orig_cmd, parg);
3421                         if (put_err)
3422                                 err = put_err;
3423                 } else if (copy_to_user(user_ptr, array_buf, array_size)) {
3424                         err = -EFAULT;
3425                 }
3426         }
3427
3428         if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3429                 err = -EFAULT;
3430 out:
3431         kvfree(array_buf);
3432         kfree(mbuf);
3433         return err;
3434 }
3435
3436 long video_ioctl2(struct file *file,
3437                unsigned int cmd, unsigned long arg)
3438 {
3439         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3440 }
3441 EXPORT_SYMBOL(video_ioctl2);