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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Video capture interface for Linux version 2
   4  *
   5  * A generic framework to process V4L2 ioctl commands.
   6  *
   7  * Authors:     Alan Cox, <[email protected]> (version 1)
   8  *              Mauro Carvalho Chehab <[email protected]> (version 2)
   9  */
  10
  11 #include <linux/compat.h>
  12 #include <linux/mm.h>
  13 #include <linux/module.h>
  14 #include <linux/slab.h>
  15 #include <linux/types.h>
  16 #include <linux/kernel.h>
  17 #include <linux/version.h>
  18
  19 #include <linux/v4l2-subdev.h>
  20 #include <linux/videodev2.h>
  21
  22 #include <media/media-device.h> /* for media_set_bus_info() */
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/videobuf2-v4l2.h>
  30 #include <media/v4l2-mc.h>
  31 #include <media/v4l2-mem2mem.h>
  32
  33 #include <trace/events/v4l2.h>
  34
  35 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  36
  37 struct std_descr {
  38         v4l2_std_id std;
  39         const char *descr;
  40 };
  41
  42 static const struct std_descr standards[] = {
  43         { V4L2_STD_NTSC,        "NTSC"      },
  44         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  45         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  46         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  47         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  48         { V4L2_STD_PAL,         "PAL"       },
  49         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  50         { V4L2_STD_PAL_B,       "PAL-B"     },
  51         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  52         { V4L2_STD_PAL_G,       "PAL-G"     },
  53         { V4L2_STD_PAL_H,       "PAL-H"     },
  54         { V4L2_STD_PAL_I,       "PAL-I"     },
  55         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  56         { V4L2_STD_PAL_D,       "PAL-D"     },
  57         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  58         { V4L2_STD_PAL_K,       "PAL-K"     },
  59         { V4L2_STD_PAL_M,       "PAL-M"     },
  60         { V4L2_STD_PAL_N,       "PAL-N"     },
  61         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  62         { V4L2_STD_PAL_60,      "PAL-60"    },
  63         { V4L2_STD_SECAM,       "SECAM"     },
  64         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  65         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  66         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  67         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  68         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  69         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  70         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  71         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  72         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  73         { 0,                    "Unknown"   }
  74 };
  75
  76 /* video4linux standard ID conversion to standard name
  77  */
  78 const char *v4l2_norm_to_name(v4l2_std_id id)
  79 {
  80         u32 myid = id;
  81         int i;
  82
  83         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  84            64 bit comparisons. So, on that architecture, with some gcc
  85            variants, compilation fails. Currently, the max value is 30bit wide.
  86          */
  87         BUG_ON(myid != id);
  88
  89         for (i = 0; standards[i].std; i++)
  90                 if (myid == standards[i].std)
  91                         break;
  92         return standards[i].descr;
  93 }
  94 EXPORT_SYMBOL(v4l2_norm_to_name);
  95
  96 /* Returns frame period for the given standard */
  97 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
  98 {
  99         if (id & V4L2_STD_525_60) {
 100                 frameperiod->numerator = 1001;
 101                 frameperiod->denominator = 30000;
 102         } else {
 103                 frameperiod->numerator = 1;
 104                 frameperiod->denominator = 25;
 105         }
 106 }
 107 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 108
 109 /* Fill in the fields of a v4l2_standard structure according to the
 110    'id' and 'transmission' parameters.  Returns negative on error.  */
 111 int v4l2_video_std_construct(struct v4l2_standard *vs,
 112                              int id, const char *name)
 113 {
 114         vs->id = id;
 115         v4l2_video_std_frame_period(id, &vs->frameperiod);
 116         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 117         strscpy(vs->name, name, sizeof(vs->name));
 118         return 0;
 119 }
 120 EXPORT_SYMBOL(v4l2_video_std_construct);
 121
 122 /* Fill in the fields of a v4l2_standard structure according to the
 123  * 'id' and 'vs->index' parameters. Returns negative on error. */
 124 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 125 {
 126         v4l2_std_id curr_id = 0;
 127         unsigned int index = vs->index, i, j = 0;
 128         const char *descr = "";
 129
 130         /* Return -ENODATA if the id for the current input
 131            or output is 0, meaning that it doesn't support this API. */
 132         if (id == 0)
 133                 return -ENODATA;
 134
 135         /* Return norm array in a canonical way */
 136         for (i = 0; i <= index && id; i++) {
 137                 /* last std value in the standards array is 0, so this
 138                    while always ends there since (id & 0) == 0. */
 139                 while ((id & standards[j].std) != standards[j].std)
 140                         j++;
 141                 curr_id = standards[j].std;
 142                 descr = standards[j].descr;
 143                 j++;
 144                 if (curr_id == 0)
 145                         break;
 146                 if (curr_id != V4L2_STD_PAL &&
 147                                 curr_id != V4L2_STD_SECAM &&
 148                                 curr_id != V4L2_STD_NTSC)
 149                         id &= ~curr_id;
 150         }
 151         if (i <= index)
 152                 return -EINVAL;
 153
 154         v4l2_video_std_construct(vs, curr_id, descr);
 155         return 0;
 156 }
 157
 158 /* ----------------------------------------------------------------- */
 159 /* some arrays for pretty-printing debug messages of enum types      */
 160
 161 const char *v4l2_field_names[] = {
 162         [V4L2_FIELD_ANY]        = "any",
 163         [V4L2_FIELD_NONE]       = "none",
 164         [V4L2_FIELD_TOP]        = "top",
 165         [V4L2_FIELD_BOTTOM]     = "bottom",
 166         [V4L2_FIELD_INTERLACED] = "interlaced",
 167         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 168         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 169         [V4L2_FIELD_ALTERNATE]  = "alternate",
 170         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 171         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 172 };
 173 EXPORT_SYMBOL(v4l2_field_names);
 174
 175 const char *v4l2_type_names[] = {
 176         [0]                                = "0",
 177         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 178         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 179         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 180         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 181         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 182         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 183         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 184         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 185         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 186         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 187         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 188         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 189         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 190         [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 191 };
 192 EXPORT_SYMBOL(v4l2_type_names);
 193
 194 static const char *v4l2_memory_names[] = {
 195         [V4L2_MEMORY_MMAP]    = "mmap",
 196         [V4L2_MEMORY_USERPTR] = "userptr",
 197         [V4L2_MEMORY_OVERLAY] = "overlay",
 198         [V4L2_MEMORY_DMABUF] = "dmabuf",
 199 };
 200
 201 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 202
 203 /* ------------------------------------------------------------------ */
 204 /* debug help functions                                               */
 205
 206 static void v4l_print_querycap(const void *arg, bool write_only)
 207 {
 208         const struct v4l2_capability *p = arg;
 209
 210         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 211                 (int)sizeof(p->driver), p->driver,
 212                 (int)sizeof(p->card), p->card,
 213                 (int)sizeof(p->bus_info), p->bus_info,
 214                 p->version, p->capabilities, p->device_caps);
 215 }
 216
 217 static void v4l_print_enuminput(const void *arg, bool write_only)
 218 {
 219         const struct v4l2_input *p = arg;
 220
 221         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 222                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 223                 p->tuner, (unsigned long long)p->std, p->status,
 224                 p->capabilities);
 225 }
 226
 227 static void v4l_print_enumoutput(const void *arg, bool write_only)
 228 {
 229         const struct v4l2_output *p = arg;
 230
 231         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 232                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 233                 p->modulator, (unsigned long long)p->std, p->capabilities);
 234 }
 235
 236 static void v4l_print_audio(const void *arg, bool write_only)
 237 {
 238         const struct v4l2_audio *p = arg;
 239
 240         if (write_only)
 241                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 242         else
 243                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 244                         p->index, (int)sizeof(p->name), p->name,
 245                         p->capability, p->mode);
 246 }
 247
 248 static void v4l_print_audioout(const void *arg, bool write_only)
 249 {
 250         const struct v4l2_audioout *p = arg;
 251
 252         if (write_only)
 253                 pr_cont("index=%u\n", p->index);
 254         else
 255                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 256                         p->index, (int)sizeof(p->name), p->name,
 257                         p->capability, p->mode);
 258 }
 259
 260 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 261 {
 262         const struct v4l2_fmtdesc *p = arg;
 263
 264         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
 265                 p->index, prt_names(p->type, v4l2_type_names),
 266                 p->flags, &p->pixelformat, p->mbus_code,
 267                 (int)sizeof(p->description), p->description);
 268 }
 269
 270 static void v4l_print_format(const void *arg, bool write_only)
 271 {
 272         const struct v4l2_format *p = arg;
 273         const struct v4l2_pix_format *pix;
 274         const struct v4l2_pix_format_mplane *mp;
 275         const struct v4l2_vbi_format *vbi;
 276         const struct v4l2_sliced_vbi_format *sliced;
 277         const struct v4l2_window *win;
 278         const struct v4l2_meta_format *meta;
 279         u32 pixelformat;
 280         u32 planes;
 281         unsigned i;
 282
 283         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 284         switch (p->type) {
 285         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 286         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 287                 pix = &p->fmt.pix;
 288                 pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 289                         pix->width, pix->height, &pix->pixelformat,
 290                         prt_names(pix->field, v4l2_field_names),
 291                         pix->bytesperline, pix->sizeimage,
 292                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 293                         pix->quantization, pix->xfer_func);
 294                 break;
 295         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 296         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 297                 mp = &p->fmt.pix_mp;
 298                 pixelformat = mp->pixelformat;
 299                 pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 300                         mp->width, mp->height, &pixelformat,
 301                         prt_names(mp->field, v4l2_field_names),
 302                         mp->colorspace, mp->num_planes, mp->flags,
 303                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 304                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 305                 for (i = 0; i < planes; i++)
 306                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 307                                         mp->plane_fmt[i].bytesperline,
 308                                         mp->plane_fmt[i].sizeimage);
 309                 break;
 310         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 311         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 312                 win = &p->fmt.win;
 313                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, global_alpha=0x%02x\n",
 314                         win->w.width, win->w.height, win->w.left, win->w.top,
 315                         prt_names(win->field, v4l2_field_names),
 316                         win->chromakey, win->global_alpha);
 317                 break;
 318         case V4L2_BUF_TYPE_VBI_CAPTURE:
 319         case V4L2_BUF_TYPE_VBI_OUTPUT:
 320                 vbi = &p->fmt.vbi;
 321                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
 322                         vbi->sampling_rate, vbi->offset,
 323                         vbi->samples_per_line, &vbi->sample_format,
 324                         vbi->start[0], vbi->start[1],
 325                         vbi->count[0], vbi->count[1]);
 326                 break;
 327         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 328         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 329                 sliced = &p->fmt.sliced;
 330                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 331                                 sliced->service_set, sliced->io_size);
 332                 for (i = 0; i < 24; i++)
 333                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 334                                 sliced->service_lines[0][i],
 335                                 sliced->service_lines[1][i]);
 336                 break;
 337         case V4L2_BUF_TYPE_SDR_CAPTURE:
 338         case V4L2_BUF_TYPE_SDR_OUTPUT:
 339                 pixelformat = p->fmt.sdr.pixelformat;
 340                 pr_cont(", pixelformat=%p4cc\n", &pixelformat);
 341                 break;
 342         case V4L2_BUF_TYPE_META_CAPTURE:
 343         case V4L2_BUF_TYPE_META_OUTPUT:
 344                 meta = &p->fmt.meta;
 345                 pixelformat = meta->dataformat;
 346                 pr_cont(", dataformat=%p4cc, buffersize=%u, width=%u, height=%u, bytesperline=%u\n",
 347                         &pixelformat, meta->buffersize, meta->width,
 348                         meta->height, meta->bytesperline);
 349                 break;
 350         }
 351 }
 352
 353 static void v4l_print_framebuffer(const void *arg, bool write_only)
 354 {
 355         const struct v4l2_framebuffer *p = arg;
 356
 357         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 358                 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
 359                 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
 360                 p->fmt.colorspace);
 361 }
 362
 363 static void v4l_print_buftype(const void *arg, bool write_only)
 364 {
 365         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 366 }
 367
 368 static void v4l_print_modulator(const void *arg, bool write_only)
 369 {
 370         const struct v4l2_modulator *p = arg;
 371
 372         if (write_only)
 373                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 374         else
 375                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 376                         p->index, (int)sizeof(p->name), p->name, p->capability,
 377                         p->rangelow, p->rangehigh, p->txsubchans);
 378 }
 379
 380 static void v4l_print_tuner(const void *arg, bool write_only)
 381 {
 382         const struct v4l2_tuner *p = arg;
 383
 384         if (write_only)
 385                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 386         else
 387                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n",
 388                         p->index, (int)sizeof(p->name), p->name, p->type,
 389                         p->capability, p->rangelow,
 390                         p->rangehigh, p->signal, p->afc,
 391                         p->rxsubchans, p->audmode);
 392 }
 393
 394 static void v4l_print_frequency(const void *arg, bool write_only)
 395 {
 396         const struct v4l2_frequency *p = arg;
 397
 398         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 399                                 p->tuner, p->type, p->frequency);
 400 }
 401
 402 static void v4l_print_standard(const void *arg, bool write_only)
 403 {
 404         const struct v4l2_standard *p = arg;
 405
 406         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 407                 p->index,
 408                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 409                 p->frameperiod.numerator,
 410                 p->frameperiod.denominator,
 411                 p->framelines);
 412 }
 413
 414 static void v4l_print_std(const void *arg, bool write_only)
 415 {
 416         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 417 }
 418
 419 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 420 {
 421         const struct v4l2_hw_freq_seek *p = arg;
 422
 423         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 424                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 425                 p->rangelow, p->rangehigh);
 426 }
 427
 428 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 429 {
 430         const struct v4l2_requestbuffers *p = arg;
 431
 432         pr_cont("count=%d, type=%s, memory=%s\n",
 433                 p->count,
 434                 prt_names(p->type, v4l2_type_names),
 435                 prt_names(p->memory, v4l2_memory_names));
 436 }
 437
 438 static void v4l_print_buffer(const void *arg, bool write_only)
 439 {
 440         const struct v4l2_buffer *p = arg;
 441         const struct v4l2_timecode *tc = &p->timecode;
 442         const struct v4l2_plane *plane;
 443         int i;
 444
 445         pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 446                         (int)p->timestamp.tv_sec / 3600,
 447                         ((int)p->timestamp.tv_sec / 60) % 60,
 448                         ((int)p->timestamp.tv_sec % 60),
 449                         (long)p->timestamp.tv_usec,
 450                         p->index,
 451                         prt_names(p->type, v4l2_type_names), p->request_fd,
 452                         p->flags, prt_names(p->field, v4l2_field_names),
 453                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 454
 455         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 456                 pr_cont("\n");
 457                 for (i = 0; i < p->length; ++i) {
 458                         plane = &p->m.planes[i];
 459                         printk(KERN_DEBUG
 460                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 461                                 i, plane->bytesused, plane->data_offset,
 462                                 plane->m.userptr, plane->length);
 463                 }
 464         } else {
 465                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 466                         p->bytesused, p->m.userptr, p->length);
 467         }
 468
 469         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 470                         tc->hours, tc->minutes, tc->seconds,
 471                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 472 }
 473
 474 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 475 {
 476         const struct v4l2_exportbuffer *p = arg;
 477
 478         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 479                 p->fd, prt_names(p->type, v4l2_type_names),
 480                 p->index, p->plane, p->flags);
 481 }
 482
 483 static void v4l_print_create_buffers(const void *arg, bool write_only)
 484 {
 485         const struct v4l2_create_buffers *p = arg;
 486
 487         pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, max num buffers=%u, ",
 488                 p->index, p->count, prt_names(p->memory, v4l2_memory_names),
 489                 p->capabilities, p->max_num_buffers);
 490         v4l_print_format(&p->format, write_only);
 491 }
 492
 493 static void v4l_print_remove_buffers(const void *arg, bool write_only)
 494 {
 495         const struct v4l2_remove_buffers *p = arg;
 496
 497         pr_cont("type=%s, index=%u, count=%u\n",
 498                 prt_names(p->type, v4l2_type_names), p->index, p->count);
 499 }
 500
 501 static void v4l_print_streamparm(const void *arg, bool write_only)
 502 {
 503         const struct v4l2_streamparm *p = arg;
 504
 505         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 506
 507         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 508             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 509                 const struct v4l2_captureparm *c = &p->parm.capture;
 510
 511                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 512                         c->capability, c->capturemode,
 513                         c->timeperframe.numerator, c->timeperframe.denominator,
 514                         c->extendedmode, c->readbuffers);
 515         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 516                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 517                 const struct v4l2_outputparm *c = &p->parm.output;
 518
 519                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 520                         c->capability, c->outputmode,
 521                         c->timeperframe.numerator, c->timeperframe.denominator,
 522                         c->extendedmode, c->writebuffers);
 523         } else {
 524                 pr_cont("\n");
 525         }
 526 }
 527
 528 static void v4l_print_queryctrl(const void *arg, bool write_only)
 529 {
 530         const struct v4l2_queryctrl *p = arg;
 531
 532         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 533                         p->id, p->type, (int)sizeof(p->name), p->name,
 534                         p->minimum, p->maximum,
 535                         p->step, p->default_value, p->flags);
 536 }
 537
 538 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 539 {
 540         const struct v4l2_query_ext_ctrl *p = arg;
 541
 542         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 543                         p->id, p->type, (int)sizeof(p->name), p->name,
 544                         p->minimum, p->maximum,
 545                         p->step, p->default_value, p->flags,
 546                         p->elem_size, p->elems, p->nr_of_dims,
 547                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 548 }
 549
 550 static void v4l_print_querymenu(const void *arg, bool write_only)
 551 {
 552         const struct v4l2_querymenu *p = arg;
 553
 554         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 555 }
 556
 557 static void v4l_print_control(const void *arg, bool write_only)
 558 {
 559         const struct v4l2_control *p = arg;
 560         const char *name = v4l2_ctrl_get_name(p->id);
 561
 562         if (name)
 563                 pr_cont("name=%s, ", name);
 564         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 565 }
 566
 567 static void v4l_print_ext_controls(const void *arg, bool write_only)
 568 {
 569         const struct v4l2_ext_controls *p = arg;
 570         int i;
 571
 572         pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 573                         p->which, p->count, p->error_idx, p->request_fd);
 574         for (i = 0; i < p->count; i++) {
 575                 unsigned int id = p->controls[i].id;
 576                 const char *name = v4l2_ctrl_get_name(id);
 577
 578                 if (name)
 579                         pr_cont(", name=%s", name);
 580                 if (!p->controls[i].size)
 581                         pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
 582                 else
 583                         pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
 584         }
 585         pr_cont("\n");
 586 }
 587
 588 static void v4l_print_cropcap(const void *arg, bool write_only)
 589 {
 590         const struct v4l2_cropcap *p = arg;
 591
 592         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 593                 prt_names(p->type, v4l2_type_names),
 594                 p->bounds.width, p->bounds.height,
 595                 p->bounds.left, p->bounds.top,
 596                 p->defrect.width, p->defrect.height,
 597                 p->defrect.left, p->defrect.top,
 598                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 599 }
 600
 601 static void v4l_print_crop(const void *arg, bool write_only)
 602 {
 603         const struct v4l2_crop *p = arg;
 604
 605         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 606                 prt_names(p->type, v4l2_type_names),
 607                 p->c.width, p->c.height,
 608                 p->c.left, p->c.top);
 609 }
 610
 611 static void v4l_print_selection(const void *arg, bool write_only)
 612 {
 613         const struct v4l2_selection *p = arg;
 614
 615         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 616                 prt_names(p->type, v4l2_type_names),
 617                 p->target, p->flags,
 618                 p->r.width, p->r.height, p->r.left, p->r.top);
 619 }
 620
 621 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 622 {
 623         const struct v4l2_jpegcompression *p = arg;
 624
 625         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 626                 p->quality, p->APPn, p->APP_len,
 627                 p->COM_len, p->jpeg_markers);
 628 }
 629
 630 static void v4l_print_enc_idx(const void *arg, bool write_only)
 631 {
 632         const struct v4l2_enc_idx *p = arg;
 633
 634         pr_cont("entries=%d, entries_cap=%d\n",
 635                         p->entries, p->entries_cap);
 636 }
 637
 638 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 639 {
 640         const struct v4l2_encoder_cmd *p = arg;
 641
 642         pr_cont("cmd=%d, flags=0x%x\n",
 643                         p->cmd, p->flags);
 644 }
 645
 646 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 647 {
 648         const struct v4l2_decoder_cmd *p = arg;
 649
 650         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 651
 652         if (p->cmd == V4L2_DEC_CMD_START)
 653                 pr_info("speed=%d, format=%u\n",
 654                                 p->start.speed, p->start.format);
 655         else if (p->cmd == V4L2_DEC_CMD_STOP)
 656                 pr_info("pts=%llu\n", p->stop.pts);
 657 }
 658
 659 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 660 {
 661         const struct v4l2_dbg_chip_info *p = arg;
 662
 663         pr_cont("type=%u, ", p->match.type);
 664         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 665                 pr_cont("name=%.*s, ",
 666                                 (int)sizeof(p->match.name), p->match.name);
 667         else
 668                 pr_cont("addr=%u, ", p->match.addr);
 669         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 670 }
 671
 672 static void v4l_print_dbg_register(const void *arg, bool write_only)
 673 {
 674         const struct v4l2_dbg_register *p = arg;
 675
 676         pr_cont("type=%u, ", p->match.type);
 677         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 678                 pr_cont("name=%.*s, ",
 679                                 (int)sizeof(p->match.name), p->match.name);
 680         else
 681                 pr_cont("addr=%u, ", p->match.addr);
 682         pr_cont("reg=0x%llx, val=0x%llx\n",
 683                         p->reg, p->val);
 684 }
 685
 686 static void v4l_print_dv_timings(const void *arg, bool write_only)
 687 {
 688         const struct v4l2_dv_timings *p = arg;
 689
 690         switch (p->type) {
 691         case V4L2_DV_BT_656_1120:
 692                 pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 693                                 p->bt.interlaced, p->bt.pixelclock,
 694                                 p->bt.width, p->bt.height,
 695                                 p->bt.polarities, p->bt.hfrontporch,
 696                                 p->bt.hsync, p->bt.hbackporch,
 697                                 p->bt.vfrontporch, p->bt.vsync,
 698                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 699                                 p->bt.il_vsync, p->bt.il_vbackporch,
 700                                 p->bt.standards, p->bt.flags);
 701                 break;
 702         default:
 703                 pr_cont("type=%d\n", p->type);
 704                 break;
 705         }
 706 }
 707
 708 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 709 {
 710         const struct v4l2_enum_dv_timings *p = arg;
 711
 712         pr_cont("index=%u, ", p->index);
 713         v4l_print_dv_timings(&p->timings, write_only);
 714 }
 715
 716 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 717 {
 718         const struct v4l2_dv_timings_cap *p = arg;
 719
 720         switch (p->type) {
 721         case V4L2_DV_BT_656_1120:
 722                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 723                         p->bt.min_width, p->bt.max_width,
 724                         p->bt.min_height, p->bt.max_height,
 725                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 726                         p->bt.standards, p->bt.capabilities);
 727                 break;
 728         default:
 729                 pr_cont("type=%u\n", p->type);
 730                 break;
 731         }
 732 }
 733
 734 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 735 {
 736         const struct v4l2_frmsizeenum *p = arg;
 737
 738         pr_cont("index=%u, pixelformat=%p4cc, type=%u",
 739                 p->index, &p->pixel_format, p->type);
 740         switch (p->type) {
 741         case V4L2_FRMSIZE_TYPE_DISCRETE:
 742                 pr_cont(", wxh=%ux%u\n",
 743                         p->discrete.width, p->discrete.height);
 744                 break;
 745         case V4L2_FRMSIZE_TYPE_STEPWISE:
 746                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 747                                 p->stepwise.min_width,
 748                                 p->stepwise.min_height,
 749                                 p->stepwise.max_width,
 750                                 p->stepwise.max_height,
 751                                 p->stepwise.step_width,
 752                                 p->stepwise.step_height);
 753                 break;
 754         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 755         default:
 756                 pr_cont("\n");
 757                 break;
 758         }
 759 }
 760
 761 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 762 {
 763         const struct v4l2_frmivalenum *p = arg;
 764
 765         pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
 766                 p->index, &p->pixel_format, p->width, p->height, p->type);
 767         switch (p->type) {
 768         case V4L2_FRMIVAL_TYPE_DISCRETE:
 769                 pr_cont(", fps=%d/%d\n",
 770                                 p->discrete.numerator,
 771                                 p->discrete.denominator);
 772                 break;
 773         case V4L2_FRMIVAL_TYPE_STEPWISE:
 774                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 775                                 p->stepwise.min.numerator,
 776                                 p->stepwise.min.denominator,
 777                                 p->stepwise.max.numerator,
 778                                 p->stepwise.max.denominator,
 779                                 p->stepwise.step.numerator,
 780                                 p->stepwise.step.denominator);
 781                 break;
 782         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 783         default:
 784                 pr_cont("\n");
 785                 break;
 786         }
 787 }
 788
 789 static void v4l_print_event(const void *arg, bool write_only)
 790 {
 791         const struct v4l2_event *p = arg;
 792         const struct v4l2_event_ctrl *c;
 793
 794         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 795                         p->type, p->pending, p->sequence, p->id,
 796                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 797         switch (p->type) {
 798         case V4L2_EVENT_VSYNC:
 799                 printk(KERN_DEBUG "field=%s\n",
 800                         prt_names(p->u.vsync.field, v4l2_field_names));
 801                 break;
 802         case V4L2_EVENT_CTRL:
 803                 c = &p->u.ctrl;
 804                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 805                         c->changes, c->type);
 806                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 807                         pr_cont("value64=%lld, ", c->value64);
 808                 else
 809                         pr_cont("value=%d, ", c->value);
 810                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 811                         c->flags, c->minimum, c->maximum,
 812                         c->step, c->default_value);
 813                 break;
 814         case V4L2_EVENT_FRAME_SYNC:
 815                 pr_cont("frame_sequence=%u\n",
 816                         p->u.frame_sync.frame_sequence);
 817                 break;
 818         }
 819 }
 820
 821 static void v4l_print_event_subscription(const void *arg, bool write_only)
 822 {
 823         const struct v4l2_event_subscription *p = arg;
 824
 825         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 826                         p->type, p->id, p->flags);
 827 }
 828
 829 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 830 {
 831         const struct v4l2_sliced_vbi_cap *p = arg;
 832         int i;
 833
 834         pr_cont("type=%s, service_set=0x%08x\n",
 835                         prt_names(p->type, v4l2_type_names), p->service_set);
 836         for (i = 0; i < 24; i++)
 837                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 838                                 p->service_lines[0][i],
 839                                 p->service_lines[1][i]);
 840 }
 841
 842 static void v4l_print_freq_band(const void *arg, bool write_only)
 843 {
 844         const struct v4l2_frequency_band *p = arg;
 845
 846         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 847                         p->tuner, p->type, p->index,
 848                         p->capability, p->rangelow,
 849                         p->rangehigh, p->modulation);
 850 }
 851
 852 static void v4l_print_edid(const void *arg, bool write_only)
 853 {
 854         const struct v4l2_edid *p = arg;
 855
 856         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 857                 p->pad, p->start_block, p->blocks);
 858 }
 859
 860 static void v4l_print_u32(const void *arg, bool write_only)
 861 {
 862         pr_cont("value=%u\n", *(const u32 *)arg);
 863 }
 864
 865 static void v4l_print_newline(const void *arg, bool write_only)
 866 {
 867         pr_cont("\n");
 868 }
 869
 870 static void v4l_print_default(const void *arg, bool write_only)
 871 {
 872         pr_cont("driver-specific ioctl\n");
 873 }
 874
 875 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
 876 {
 877         __u32 i;
 878
 879         /* zero the reserved fields */
 880         c->reserved[0] = 0;
 881         for (i = 0; i < c->count; i++)
 882                 c->controls[i].reserved2[0] = 0;
 883
 884         switch (c->which) {
 885         case V4L2_CID_PRIVATE_BASE:
 886                 /*
 887                  * V4L2_CID_PRIVATE_BASE cannot be used as control class
 888                  * when using extended controls.
 889                  * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 890                  * is it allowed for backwards compatibility.
 891                  */
 892                 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
 893                         return false;
 894                 break;
 895         case V4L2_CTRL_WHICH_DEF_VAL:
 896                 /* Default value cannot be changed */
 897                 if (ioctl == VIDIOC_S_EXT_CTRLS ||
 898                     ioctl == VIDIOC_TRY_EXT_CTRLS) {
 899                         c->error_idx = c->count;
 900                         return false;
 901                 }
 902                 return true;
 903         case V4L2_CTRL_WHICH_CUR_VAL:
 904                 return true;
 905         case V4L2_CTRL_WHICH_REQUEST_VAL:
 906                 c->error_idx = c->count;
 907                 return false;
 908         }
 909
 910         /* Check that all controls are from the same control class. */
 911         for (i = 0; i < c->count; i++) {
 912                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 913                         c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
 914                                                                       c->count;
 915                         return false;
 916                 }
 917         }
 918         return true;
 919 }
 920
 921 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 922 {
 923         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 924                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 925                              V4L2_CAP_VIDEO_OUTPUT |
 926                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 927                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 928         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 929                               V4L2_CAP_META_OUTPUT;
 930         struct video_device *vfd = video_devdata(file);
 931         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 932         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 933                       (vfd->device_caps & vid_caps);
 934         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 935         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 936         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 937         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 938                        (vfd->device_caps & meta_caps);
 939         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 940         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 941
 942         if (ops == NULL)
 943                 return -EINVAL;
 944
 945         switch (type) {
 946         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 947                 if ((is_vid || is_tch) && is_rx &&
 948                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 949                         return 0;
 950                 break;
 951         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 952                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 953                         return 0;
 954                 break;
 955         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 956                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 957                         return 0;
 958                 break;
 959         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 960                 if (is_vid && is_tx &&
 961                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 962                         return 0;
 963                 break;
 964         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 965                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 966                         return 0;
 967                 break;
 968         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 969                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 970                         return 0;
 971                 break;
 972         case V4L2_BUF_TYPE_VBI_CAPTURE:
 973                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 974                         return 0;
 975                 break;
 976         case V4L2_BUF_TYPE_VBI_OUTPUT:
 977                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 978                         return 0;
 979                 break;
 980         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 981                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 982                         return 0;
 983                 break;
 984         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 985                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 986                         return 0;
 987                 break;
 988         case V4L2_BUF_TYPE_SDR_CAPTURE:
 989                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 990                         return 0;
 991                 break;
 992         case V4L2_BUF_TYPE_SDR_OUTPUT:
 993                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 994                         return 0;
 995                 break;
 996         case V4L2_BUF_TYPE_META_CAPTURE:
 997                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
 998                         return 0;
 999                 break;
1000         case V4L2_BUF_TYPE_META_OUTPUT:
1001                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
1002                         return 0;
1003                 break;
1004         default:
1005                 break;
1006         }
1007         return -EINVAL;
1008 }
1009
1010 static void v4l_sanitize_colorspace(u32 pixelformat, u32 *colorspace,
1011                                     u32 *encoding, u32 *quantization,
1012                                     u32 *xfer_func)
1013 {
1014         bool is_hsv = pixelformat == V4L2_PIX_FMT_HSV24 ||
1015                       pixelformat == V4L2_PIX_FMT_HSV32;
1016
1017         if (!v4l2_is_colorspace_valid(*colorspace)) {
1018                 *colorspace = V4L2_COLORSPACE_DEFAULT;
1019                 *encoding = V4L2_YCBCR_ENC_DEFAULT;
1020                 *quantization = V4L2_QUANTIZATION_DEFAULT;
1021                 *xfer_func = V4L2_XFER_FUNC_DEFAULT;
1022         }
1023
1024         if ((!is_hsv && !v4l2_is_ycbcr_enc_valid(*encoding)) ||
1025             (is_hsv && !v4l2_is_hsv_enc_valid(*encoding)))
1026                 *encoding = V4L2_YCBCR_ENC_DEFAULT;
1027
1028         if (!v4l2_is_quant_valid(*quantization))
1029                 *quantization = V4L2_QUANTIZATION_DEFAULT;
1030
1031         if (!v4l2_is_xfer_func_valid(*xfer_func))
1032                 *xfer_func = V4L2_XFER_FUNC_DEFAULT;
1033 }
1034
1035 static void v4l_sanitize_format(struct v4l2_format *fmt)
1036 {
1037         unsigned int offset;
1038
1039         /* Make sure num_planes is not bogus */
1040         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1041             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1042                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1043                                                VIDEO_MAX_PLANES);
1044
1045         /*
1046          * The v4l2_pix_format structure has been extended with fields that were
1047          * not previously required to be set to zero by applications. The priv
1048          * field, when set to a magic value, indicates that the extended fields
1049          * are valid. Otherwise they will contain undefined values. To simplify
1050          * the API towards drivers zero the extended fields and set the priv
1051          * field to the magic value when the extended pixel format structure
1052          * isn't used by applications.
1053          */
1054         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1055             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1056                 if (fmt->fmt.pix.priv != V4L2_PIX_FMT_PRIV_MAGIC) {
1057                         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1058
1059                         offset = offsetof(struct v4l2_pix_format, priv)
1060                                + sizeof(fmt->fmt.pix.priv);
1061                         memset(((void *)&fmt->fmt.pix) + offset, 0,
1062                                sizeof(fmt->fmt.pix) - offset);
1063                 }
1064         }
1065
1066         /* Replace invalid colorspace values with defaults. */
1067         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1068             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1069                 v4l_sanitize_colorspace(fmt->fmt.pix.pixelformat,
1070                                         &fmt->fmt.pix.colorspace,
1071                                         &fmt->fmt.pix.ycbcr_enc,
1072                                         &fmt->fmt.pix.quantization,
1073                                         &fmt->fmt.pix.xfer_func);
1074         } else if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1075                    fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
1076                 u32 ycbcr_enc = fmt->fmt.pix_mp.ycbcr_enc;
1077                 u32 quantization = fmt->fmt.pix_mp.quantization;
1078                 u32 xfer_func = fmt->fmt.pix_mp.xfer_func;
1079
1080                 v4l_sanitize_colorspace(fmt->fmt.pix_mp.pixelformat,
1081                                         &fmt->fmt.pix_mp.colorspace, &ycbcr_enc,
1082                                         &quantization, &xfer_func);
1083
1084                 fmt->fmt.pix_mp.ycbcr_enc = ycbcr_enc;
1085                 fmt->fmt.pix_mp.quantization = quantization;
1086                 fmt->fmt.pix_mp.xfer_func = xfer_func;
1087         }
1088 }
1089
1090 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1091                                 struct file *file, void *fh, void *arg)
1092 {
1093         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1094         struct video_device *vfd = video_devdata(file);
1095         int ret;
1096
1097         cap->version = LINUX_VERSION_CODE;
1098         cap->device_caps = vfd->device_caps;
1099         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1100
1101         media_set_bus_info(cap->bus_info, sizeof(cap->bus_info),
1102                            vfd->dev_parent);
1103
1104         ret = ops->vidioc_querycap(file, fh, cap);
1105
1106         /*
1107          * Drivers must not change device_caps, so check for this and
1108          * warn if this happened.
1109          */
1110         WARN_ON(cap->device_caps != vfd->device_caps);
1111         /*
1112          * Check that capabilities is a superset of
1113          * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1114          */
1115         WARN_ON((cap->capabilities &
1116                  (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1117                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1118         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1119         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1120
1121         return ret;
1122 }
1123
1124 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1125                        struct file *file, void *fh, void *arg)
1126 {
1127         struct video_device *vfd = video_devdata(file);
1128
1129         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1130                 *(int *)arg = 0;
1131                 return 0;
1132         }
1133
1134         return ops->vidioc_g_input(file, fh, arg);
1135 }
1136
1137 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1138                         struct file *file, void *fh, void *arg)
1139 {
1140         struct video_device *vfd = video_devdata(file);
1141
1142         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1143                 *(int *)arg = 0;
1144                 return 0;
1145         }
1146
1147         return ops->vidioc_g_output(file, fh, arg);
1148 }
1149
1150 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1151                                 struct file *file, void *fh, void *arg)
1152 {
1153         struct video_device *vfd = video_devdata(file);
1154         int ret;
1155
1156         ret = v4l_enable_media_source(vfd);
1157         if (ret)
1158                 return ret;
1159
1160         if (vfd->device_caps & V4L2_CAP_IO_MC)
1161                 return  *(int *)arg ? -EINVAL : 0;
1162
1163         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1164 }
1165
1166 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1167                                 struct file *file, void *fh, void *arg)
1168 {
1169         struct video_device *vfd = video_devdata(file);
1170
1171         if (vfd->device_caps & V4L2_CAP_IO_MC)
1172                 return  *(int *)arg ? -EINVAL : 0;
1173
1174         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1175 }
1176
1177 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1178                                 struct file *file, void *fh, void *arg)
1179 {
1180         struct video_device *vfd;
1181         u32 *p = arg;
1182
1183         vfd = video_devdata(file);
1184         *p = v4l2_prio_max(vfd->prio);
1185         return 0;
1186 }
1187
1188 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1189                                 struct file *file, void *fh, void *arg)
1190 {
1191         struct video_device *vfd;
1192         struct v4l2_fh *vfh;
1193         u32 *p = arg;
1194
1195         vfd = video_devdata(file);
1196         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1197                 return -ENOTTY;
1198         vfh = file->private_data;
1199         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1200 }
1201
1202 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1203                                 struct file *file, void *fh, void *arg)
1204 {
1205         struct video_device *vfd = video_devdata(file);
1206         struct v4l2_input *p = arg;
1207
1208         /*
1209          * We set the flags for CAP_DV_TIMINGS &
1210          * CAP_STD here based on ioctl handler provided by the
1211          * driver. If the driver doesn't support these
1212          * for a specific input, it must override these flags.
1213          */
1214         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1215                 p->capabilities |= V4L2_IN_CAP_STD;
1216
1217         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1218                 if (p->index)
1219                         return -EINVAL;
1220                 strscpy(p->name, vfd->name, sizeof(p->name));
1221                 p->type = V4L2_INPUT_TYPE_CAMERA;
1222                 return 0;
1223         }
1224
1225         return ops->vidioc_enum_input(file, fh, p);
1226 }
1227
1228 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1229                                 struct file *file, void *fh, void *arg)
1230 {
1231         struct video_device *vfd = video_devdata(file);
1232         struct v4l2_output *p = arg;
1233
1234         /*
1235          * We set the flags for CAP_DV_TIMINGS &
1236          * CAP_STD here based on ioctl handler provided by the
1237          * driver. If the driver doesn't support these
1238          * for a specific output, it must override these flags.
1239          */
1240         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1241                 p->capabilities |= V4L2_OUT_CAP_STD;
1242
1243         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1244                 if (p->index)
1245                         return -EINVAL;
1246                 strscpy(p->name, vfd->name, sizeof(p->name));
1247                 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1248                 return 0;
1249         }
1250
1251         return ops->vidioc_enum_output(file, fh, p);
1252 }
1253
1254 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1255 {
1256         const unsigned sz = sizeof(fmt->description);
1257         const char *descr = NULL;
1258         u32 flags = 0;
1259
1260         /*
1261          * We depart from the normal coding style here since the descriptions
1262          * should be aligned so it is easy to see which descriptions will be
1263          * longer than 31 characters (the max length for a description).
1264          * And frankly, this is easier to read anyway.
1265          *
1266          * Note that gcc will use O(log N) comparisons to find the right case.
1267          */
1268         switch (fmt->pixelformat) {
1269         /* Max description length mask: descr = "0123456789012345678901234567890" */
1270         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1271         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1272         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1273         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1274         case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1275         case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1276         case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1277         case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1278         case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1279         case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1280         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1281         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1282         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1283         case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1284         case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1285         case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1286         case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1287         case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1288         case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1289         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1290         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1291         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1292         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1293         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1294         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1295         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1296         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1297         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1298         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1299         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1300         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1301         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1302         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1303         case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1304         case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1305         case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1306         case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1307         case V4L2_PIX_FMT_RGBX1010102:  descr = "32-bit RGBX 10-10-10-2"; break;
1308         case V4L2_PIX_FMT_RGBA1010102:  descr = "32-bit RGBA 10-10-10-2"; break;
1309         case V4L2_PIX_FMT_ARGB2101010:  descr = "32-bit ARGB 2-10-10-10"; break;
1310         case V4L2_PIX_FMT_BGR48:        descr = "48-bit BGR 16-16-16"; break;
1311         case V4L2_PIX_FMT_RGB48:        descr = "48-bit RGB 16-16-16"; break;
1312         case V4L2_PIX_FMT_BGR48_12:     descr = "12-bit Depth BGR"; break;
1313         case V4L2_PIX_FMT_ABGR64_12:    descr = "12-bit Depth BGRA"; break;
1314         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1315         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1316         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1317         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1318         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1319         case V4L2_PIX_FMT_Y012:         descr = "12-bit Greyscale (bits 15-4)"; break;
1320         case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1321         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1322         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1323         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1324         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1325         case V4L2_PIX_FMT_IPU3_Y10:     descr = "10-bit greyscale (IPU3 Packed)"; break;
1326         case V4L2_PIX_FMT_Y12P:         descr = "12-bit Greyscale (MIPI Packed)"; break;
1327         case V4L2_PIX_FMT_Y14P:         descr = "14-bit Greyscale (MIPI Packed)"; break;
1328         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1329         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1330         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1331         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1332         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1333         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1334         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1335         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1336         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1337         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1338         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1339         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1340         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1341         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1342         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1343         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1344         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1345         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1346         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1347         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1348         case V4L2_PIX_FMT_YUV24:        descr = "24-bit YUV 4:4:4 8-8-8"; break;
1349         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1350         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1351         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1352         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1353         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1354         case V4L2_PIX_FMT_YUVA32:       descr = "32-bit YUVA 8-8-8-8"; break;
1355         case V4L2_PIX_FMT_YUVX32:       descr = "32-bit YUVX 8-8-8-8"; break;
1356         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1357         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1358         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1359         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1360         case V4L2_PIX_FMT_YUV48_12:     descr = "12-bit YUV 4:4:4 Packed"; break;
1361         case V4L2_PIX_FMT_NV12:         descr = "Y/UV 4:2:0"; break;
1362         case V4L2_PIX_FMT_NV21:         descr = "Y/VU 4:2:0"; break;
1363         case V4L2_PIX_FMT_NV16:         descr = "Y/UV 4:2:2"; break;
1364         case V4L2_PIX_FMT_NV61:         descr = "Y/VU 4:2:2"; break;
1365         case V4L2_PIX_FMT_NV24:         descr = "Y/UV 4:4:4"; break;
1366         case V4L2_PIX_FMT_NV42:         descr = "Y/VU 4:4:4"; break;
1367         case V4L2_PIX_FMT_P010:         descr = "10-bit Y/UV 4:2:0"; break;
1368         case V4L2_PIX_FMT_P012:         descr = "12-bit Y/UV 4:2:0"; break;
1369         case V4L2_PIX_FMT_NV12_4L4:     descr = "Y/UV 4:2:0 (4x4 Linear)"; break;
1370         case V4L2_PIX_FMT_NV12_16L16:   descr = "Y/UV 4:2:0 (16x16 Linear)"; break;
1371         case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/UV 4:2:0 (32x32 Linear)"; break;
1372         case V4L2_PIX_FMT_NV15_4L4:     descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
1373         case V4L2_PIX_FMT_P010_4L4:     descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
1374         case V4L2_PIX_FMT_NV12M:        descr = "Y/UV 4:2:0 (N-C)"; break;
1375         case V4L2_PIX_FMT_NV21M:        descr = "Y/VU 4:2:0 (N-C)"; break;
1376         case V4L2_PIX_FMT_NV16M:        descr = "Y/UV 4:2:2 (N-C)"; break;
1377         case V4L2_PIX_FMT_NV61M:        descr = "Y/VU 4:2:2 (N-C)"; break;
1378         case V4L2_PIX_FMT_NV12MT:       descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break;
1379         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break;
1380         case V4L2_PIX_FMT_P012M:        descr = "12-bit Y/UV 4:2:0 (N-C)"; break;
1381         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1382         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1383         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1384         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1385         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1386         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1387         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1388         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1389         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1390         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1391         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1392         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1393         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1394         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1395         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1396         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1397         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1398         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1399         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1400         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1401         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1402         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1403         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1404         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1405         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1406         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1407         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1408         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1409         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1410         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1411         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1412         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1413         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1414         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1415         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1416         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1417         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1418         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1419         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1420         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1421         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1422         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1423         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1424         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1425         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1426         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1427         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1428         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1429         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1430         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1431         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1432         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1433         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1434         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1435         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1436         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1437         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1438         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1439         case V4L2_PIX_FMT_MM21:         descr = "Mediatek 8-bit Block Format"; break;
1440         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1441         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1442         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1443         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1444         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1445         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1446         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1447         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1448         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1449         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1450         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1451         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1452         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1453         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1454         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1455         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1456         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1457         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1458         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1459         case V4L2_META_FMT_RK_ISP1_PARAMS:      descr = "Rockchip ISP1 3A Parameters"; break;
1460         case V4L2_META_FMT_RK_ISP1_STAT_3A:     descr = "Rockchip ISP1 3A Statistics"; break;
1461         case V4L2_META_FMT_RK_ISP1_EXT_PARAMS:  descr = "Rockchip ISP1 Ext 3A Params"; break;
1462         case V4L2_PIX_FMT_NV12_8L128:   descr = "NV12 (8x128 Linear)"; break;
1463         case V4L2_PIX_FMT_NV12M_8L128:  descr = "NV12M (8x128 Linear)"; break;
1464         case V4L2_PIX_FMT_NV12_10BE_8L128:      descr = "10-bit NV12 (8x128 Linear, BE)"; break;
1465         case V4L2_PIX_FMT_NV12M_10BE_8L128:     descr = "10-bit NV12M (8x128 Linear, BE)"; break;
1466         case V4L2_PIX_FMT_Y210:         descr = "10-bit YUYV Packed"; break;
1467         case V4L2_PIX_FMT_Y212:         descr = "12-bit YUYV Packed"; break;
1468         case V4L2_PIX_FMT_Y216:         descr = "16-bit YUYV Packed"; break;
1469         case V4L2_META_FMT_RPI_BE_CFG:  descr = "RPi PiSP BE Config format"; break;
1470         case V4L2_META_FMT_GENERIC_8:   descr = "8-bit Generic Metadata"; break;
1471         case V4L2_META_FMT_GENERIC_CSI2_10:     descr = "8-bit Generic Meta, 10b CSI-2"; break;
1472         case V4L2_META_FMT_GENERIC_CSI2_12:     descr = "8-bit Generic Meta, 12b CSI-2"; break;
1473         case V4L2_META_FMT_GENERIC_CSI2_14:     descr = "8-bit Generic Meta, 14b CSI-2"; break;
1474         case V4L2_META_FMT_GENERIC_CSI2_16:     descr = "8-bit Generic Meta, 16b CSI-2"; break;
1475         case V4L2_META_FMT_GENERIC_CSI2_20:     descr = "8-bit Generic Meta, 20b CSI-2"; break;
1476         case V4L2_META_FMT_GENERIC_CSI2_24:     descr = "8-bit Generic Meta, 24b CSI-2"; break;
1477
1478         default:
1479                 /* Compressed formats */
1480                 flags = V4L2_FMT_FLAG_COMPRESSED;
1481                 switch (fmt->pixelformat) {
1482                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1483                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1484                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1485                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1486                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1487                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1488                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1489                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1490                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1491                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1492                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1493                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1494                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1495                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1496                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1497                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1498                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1499                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1500                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1501                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1502                 case V4L2_PIX_FMT_VP9_FRAME:    descr = "VP9 Frame"; break;
1503                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1504                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1505                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1506                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1507                 case V4L2_PIX_FMT_SPK:          descr = "Sorenson Spark"; break;
1508                 case V4L2_PIX_FMT_RV30:         descr = "RealVideo 8"; break;
1509                 case V4L2_PIX_FMT_RV40:         descr = "RealVideo 9 & 10"; break;
1510                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1511                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1512                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1513                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1514                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1515                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1516                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1517                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1518                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1519                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1520                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1521                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1522                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1523                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1524                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1525                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1526                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1527                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1528                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1529                 case V4L2_PIX_FMT_QC08C:        descr = "QCOM Compressed 8-bit Format"; break;
1530                 case V4L2_PIX_FMT_QC10C:        descr = "QCOM Compressed 10-bit Format"; break;
1531                 case V4L2_PIX_FMT_AJPG:         descr = "Aspeed JPEG"; break;
1532                 case V4L2_PIX_FMT_AV1_FRAME:    descr = "AV1 Frame"; break;
1533                 case V4L2_PIX_FMT_MT2110T:      descr = "Mediatek 10bit Tile Mode"; break;
1534                 case V4L2_PIX_FMT_MT2110R:      descr = "Mediatek 10bit Raster Mode"; break;
1535                 case V4L2_PIX_FMT_HEXTILE:      descr = "Hextile Compressed Format"; break;
1536                 case V4L2_PIX_FMT_PISP_COMP1_RGGB: descr = "PiSP 8b RGRG/GBGB mode1 compr"; break;
1537                 case V4L2_PIX_FMT_PISP_COMP1_GRBG: descr = "PiSP 8b GRGR/BGBG mode1 compr"; break;
1538                 case V4L2_PIX_FMT_PISP_COMP1_GBRG: descr = "PiSP 8b GBGB/RGRG mode1 compr"; break;
1539                 case V4L2_PIX_FMT_PISP_COMP1_BGGR: descr = "PiSP 8b BGBG/GRGR mode1 compr"; break;
1540                 case V4L2_PIX_FMT_PISP_COMP1_MONO: descr = "PiSP 8b monochrome mode1 compr"; break;
1541                 case V4L2_PIX_FMT_PISP_COMP2_RGGB: descr = "PiSP 8b RGRG/GBGB mode2 compr"; break;
1542                 case V4L2_PIX_FMT_PISP_COMP2_GRBG: descr = "PiSP 8b GRGR/BGBG mode2 compr"; break;
1543                 case V4L2_PIX_FMT_PISP_COMP2_GBRG: descr = "PiSP 8b GBGB/RGRG mode2 compr"; break;
1544                 case V4L2_PIX_FMT_PISP_COMP2_BGGR: descr = "PiSP 8b BGBG/GRGR mode2 compr"; break;
1545                 case V4L2_PIX_FMT_PISP_COMP2_MONO: descr = "PiSP 8b monochrome mode2 compr"; break;
1546                 default:
1547                         if (fmt->description[0])
1548                                 return;
1549                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1550                         flags = 0;
1551                         snprintf(fmt->description, sz, "%p4cc",
1552                                  &fmt->pixelformat);
1553                         break;
1554                 }
1555         }
1556
1557         if (fmt->type == V4L2_BUF_TYPE_META_CAPTURE) {
1558                 switch (fmt->pixelformat) {
1559                 case V4L2_META_FMT_GENERIC_8:
1560                 case V4L2_META_FMT_GENERIC_CSI2_10:
1561                 case V4L2_META_FMT_GENERIC_CSI2_12:
1562                 case V4L2_META_FMT_GENERIC_CSI2_14:
1563                 case V4L2_META_FMT_GENERIC_CSI2_16:
1564                 case V4L2_META_FMT_GENERIC_CSI2_20:
1565                 case V4L2_META_FMT_GENERIC_CSI2_24:
1566                         fmt->flags |= V4L2_FMT_FLAG_META_LINE_BASED;
1567                         break;
1568                 default:
1569                         fmt->flags &= ~V4L2_FMT_FLAG_META_LINE_BASED;
1570                 }
1571         }
1572
1573         if (descr)
1574                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1575         fmt->flags |= flags;
1576 }
1577
1578 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1579                                 struct file *file, void *fh, void *arg)
1580 {
1581         struct video_device *vdev = video_devdata(file);
1582         struct v4l2_fmtdesc *p = arg;
1583         int ret = check_fmt(file, p->type);
1584         u32 mbus_code;
1585         u32 cap_mask;
1586
1587         if (ret)
1588                 return ret;
1589         ret = -EINVAL;
1590
1591         if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1592                 p->mbus_code = 0;
1593
1594         mbus_code = p->mbus_code;
1595         memset_after(p, 0, type);
1596         p->mbus_code = mbus_code;
1597
1598         switch (p->type) {
1599         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1600         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1601                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1602                            V4L2_CAP_VIDEO_M2M_MPLANE;
1603                 if (!!(vdev->device_caps & cap_mask) !=
1604                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1605                         break;
1606
1607                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1608                         break;
1609                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1610                 break;
1611         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1612                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1613                         break;
1614                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1615                 break;
1616         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1617         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1618                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1619                            V4L2_CAP_VIDEO_M2M_MPLANE;
1620                 if (!!(vdev->device_caps & cap_mask) !=
1621                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1622                         break;
1623
1624                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1625                         break;
1626                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1627                 break;
1628         case V4L2_BUF_TYPE_SDR_CAPTURE:
1629                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1630                         break;
1631                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1632                 break;
1633         case V4L2_BUF_TYPE_SDR_OUTPUT:
1634                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1635                         break;
1636                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1637                 break;
1638         case V4L2_BUF_TYPE_META_CAPTURE:
1639                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1640                         break;
1641                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1642                 break;
1643         case V4L2_BUF_TYPE_META_OUTPUT:
1644                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1645                         break;
1646                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1647                 break;
1648         }
1649         if (ret == 0)
1650                 v4l_fill_fmtdesc(p);
1651         return ret;
1652 }
1653
1654 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1655 {
1656         /*
1657          * The v4l2_pix_format structure contains fields that make no sense for
1658          * touch. Set them to default values in this case.
1659          */
1660
1661         p->field = V4L2_FIELD_NONE;
1662         p->colorspace = V4L2_COLORSPACE_RAW;
1663         p->flags = 0;
1664         p->ycbcr_enc = 0;
1665         p->quantization = 0;
1666         p->xfer_func = 0;
1667 }
1668
1669 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1670                                 struct file *file, void *fh, void *arg)
1671 {
1672         struct v4l2_format *p = arg;
1673         struct video_device *vfd = video_devdata(file);
1674         int ret = check_fmt(file, p->type);
1675
1676         if (ret)
1677                 return ret;
1678
1679         memset(&p->fmt, 0, sizeof(p->fmt));
1680
1681         switch (p->type) {
1682         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1683                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1684                         break;
1685                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1686                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1687                 /* just in case the driver zeroed it again */
1688                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1689                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1690                         v4l_pix_format_touch(&p->fmt.pix);
1691                 return ret;
1692         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1693                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1694         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1695                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1696         case V4L2_BUF_TYPE_VBI_CAPTURE:
1697                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1698         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1699                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1700         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1701                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1702                         break;
1703                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1704                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1705                 /* just in case the driver zeroed it again */
1706                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1707                 return ret;
1708         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1709                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1710         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1711                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1712         case V4L2_BUF_TYPE_VBI_OUTPUT:
1713                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1714         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1715                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1716         case V4L2_BUF_TYPE_SDR_CAPTURE:
1717                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1718         case V4L2_BUF_TYPE_SDR_OUTPUT:
1719                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1720         case V4L2_BUF_TYPE_META_CAPTURE:
1721                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1722         case V4L2_BUF_TYPE_META_OUTPUT:
1723                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1724         }
1725         return -EINVAL;
1726 }
1727
1728 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1729                                 struct file *file, void *fh, void *arg)
1730 {
1731         struct v4l2_format *p = arg;
1732         struct video_device *vfd = video_devdata(file);
1733         int ret = check_fmt(file, p->type);
1734         unsigned int i;
1735
1736         if (ret)
1737                 return ret;
1738
1739         ret = v4l_enable_media_source(vfd);
1740         if (ret)
1741                 return ret;
1742         v4l_sanitize_format(p);
1743
1744         switch (p->type) {
1745         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1746                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1747                         break;
1748                 memset_after(p, 0, fmt.pix);
1749                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1750                 /* just in case the driver zeroed it again */
1751                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1752                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1753                         v4l_pix_format_touch(&p->fmt.pix);
1754                 return ret;
1755         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1756                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1757                         break;
1758                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1759                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1760                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1761                                      0, bytesperline);
1762                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1763         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1764                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1765                         break;
1766                 memset_after(p, 0, fmt.win);
1767                 p->fmt.win.clips = NULL;
1768                 p->fmt.win.clipcount = 0;
1769                 p->fmt.win.bitmap = NULL;
1770                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1771         case V4L2_BUF_TYPE_VBI_CAPTURE:
1772                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1773                         break;
1774                 memset_after(p, 0, fmt.vbi.flags);
1775                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1776         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1777                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1778                         break;
1779                 memset_after(p, 0, fmt.sliced.io_size);
1780                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1781         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1782                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1783                         break;
1784                 memset_after(p, 0, fmt.pix);
1785                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1786                 /* just in case the driver zeroed it again */
1787                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1788                 return ret;
1789         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1790                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1791                         break;
1792                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1793                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1794                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1795                                      0, bytesperline);
1796                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1797         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1798                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1799                         break;
1800                 memset_after(p, 0, fmt.win);
1801                 p->fmt.win.clips = NULL;
1802                 p->fmt.win.clipcount = 0;
1803                 p->fmt.win.bitmap = NULL;
1804                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1805         case V4L2_BUF_TYPE_VBI_OUTPUT:
1806                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1807                         break;
1808                 memset_after(p, 0, fmt.vbi.flags);
1809                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1810         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1811                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1812                         break;
1813                 memset_after(p, 0, fmt.sliced.io_size);
1814                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1815         case V4L2_BUF_TYPE_SDR_CAPTURE:
1816                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1817                         break;
1818                 memset_after(p, 0, fmt.sdr.buffersize);
1819                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1820         case V4L2_BUF_TYPE_SDR_OUTPUT:
1821                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1822                         break;
1823                 memset_after(p, 0, fmt.sdr.buffersize);
1824                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1825         case V4L2_BUF_TYPE_META_CAPTURE:
1826                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1827                         break;
1828                 memset_after(p, 0, fmt.meta);
1829                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1830         case V4L2_BUF_TYPE_META_OUTPUT:
1831                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1832                         break;
1833                 memset_after(p, 0, fmt.meta);
1834                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1835         }
1836         return -EINVAL;
1837 }
1838
1839 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1840                                 struct file *file, void *fh, void *arg)
1841 {
1842         struct v4l2_format *p = arg;
1843         struct video_device *vfd = video_devdata(file);
1844         int ret = check_fmt(file, p->type);
1845         unsigned int i;
1846
1847         if (ret)
1848                 return ret;
1849
1850         v4l_sanitize_format(p);
1851
1852         switch (p->type) {
1853         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1854                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1855                         break;
1856                 memset_after(p, 0, fmt.pix);
1857                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1858                 /* just in case the driver zeroed it again */
1859                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1860                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1861                         v4l_pix_format_touch(&p->fmt.pix);
1862                 return ret;
1863         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1864                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1865                         break;
1866                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1867                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1868                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1869                                      0, bytesperline);
1870                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1871         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1872                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1873                         break;
1874                 memset_after(p, 0, fmt.win);
1875                 p->fmt.win.clips = NULL;
1876                 p->fmt.win.clipcount = 0;
1877                 p->fmt.win.bitmap = NULL;
1878                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1879         case V4L2_BUF_TYPE_VBI_CAPTURE:
1880                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1881                         break;
1882                 memset_after(p, 0, fmt.vbi.flags);
1883                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1884         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1885                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1886                         break;
1887                 memset_after(p, 0, fmt.sliced.io_size);
1888                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1889         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1890                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1891                         break;
1892                 memset_after(p, 0, fmt.pix);
1893                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1894                 /* just in case the driver zeroed it again */
1895                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1896                 return ret;
1897         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1898                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1899                         break;
1900                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1901                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1902                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1903                                      0, bytesperline);
1904                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1905         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1906                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1907                         break;
1908                 memset_after(p, 0, fmt.win);
1909                 p->fmt.win.clips = NULL;
1910                 p->fmt.win.clipcount = 0;
1911                 p->fmt.win.bitmap = NULL;
1912                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1913         case V4L2_BUF_TYPE_VBI_OUTPUT:
1914                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1915                         break;
1916                 memset_after(p, 0, fmt.vbi.flags);
1917                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1918         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1919                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1920                         break;
1921                 memset_after(p, 0, fmt.sliced.io_size);
1922                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1923         case V4L2_BUF_TYPE_SDR_CAPTURE:
1924                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1925                         break;
1926                 memset_after(p, 0, fmt.sdr.buffersize);
1927                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1928         case V4L2_BUF_TYPE_SDR_OUTPUT:
1929                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1930                         break;
1931                 memset_after(p, 0, fmt.sdr.buffersize);
1932                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1933         case V4L2_BUF_TYPE_META_CAPTURE:
1934                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1935                         break;
1936                 memset_after(p, 0, fmt.meta);
1937                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1938         case V4L2_BUF_TYPE_META_OUTPUT:
1939                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1940                         break;
1941                 memset_after(p, 0, fmt.meta);
1942                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1943         }
1944         return -EINVAL;
1945 }
1946
1947 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1948                                 struct file *file, void *fh, void *arg)
1949 {
1950         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1951 }
1952
1953 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1954                                 struct file *file, void *fh, void *arg)
1955 {
1956         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1957 }
1958
1959 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1960                                 struct file *file, void *fh, void *arg)
1961 {
1962         struct video_device *vfd = video_devdata(file);
1963         struct v4l2_tuner *p = arg;
1964         int err;
1965
1966         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1967                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1968         err = ops->vidioc_g_tuner(file, fh, p);
1969         if (!err)
1970                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1971         return err;
1972 }
1973
1974 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1975                                 struct file *file, void *fh, void *arg)
1976 {
1977         struct video_device *vfd = video_devdata(file);
1978         struct v4l2_tuner *p = arg;
1979         int ret;
1980
1981         ret = v4l_enable_media_source(vfd);
1982         if (ret)
1983                 return ret;
1984         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1985                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1986         return ops->vidioc_s_tuner(file, fh, p);
1987 }
1988
1989 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1990                                 struct file *file, void *fh, void *arg)
1991 {
1992         struct video_device *vfd = video_devdata(file);
1993         struct v4l2_modulator *p = arg;
1994         int err;
1995
1996         if (vfd->vfl_type == VFL_TYPE_RADIO)
1997                 p->type = V4L2_TUNER_RADIO;
1998
1999         err = ops->vidioc_g_modulator(file, fh, p);
2000         if (!err)
2001                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
2002         return err;
2003 }
2004
2005 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
2006                                 struct file *file, void *fh, void *arg)
2007 {
2008         struct video_device *vfd = video_devdata(file);
2009         struct v4l2_modulator *p = arg;
2010
2011         if (vfd->vfl_type == VFL_TYPE_RADIO)
2012                 p->type = V4L2_TUNER_RADIO;
2013
2014         return ops->vidioc_s_modulator(file, fh, p);
2015 }
2016
2017 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
2018                                 struct file *file, void *fh, void *arg)
2019 {
2020         struct video_device *vfd = video_devdata(file);
2021         struct v4l2_frequency *p = arg;
2022
2023         if (vfd->vfl_type == VFL_TYPE_SDR)
2024                 p->type = V4L2_TUNER_SDR;
2025         else
2026                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2027                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2028         return ops->vidioc_g_frequency(file, fh, p);
2029 }
2030
2031 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
2032                                 struct file *file, void *fh, void *arg)
2033 {
2034         struct video_device *vfd = video_devdata(file);
2035         const struct v4l2_frequency *p = arg;
2036         enum v4l2_tuner_type type;
2037         int ret;
2038
2039         ret = v4l_enable_media_source(vfd);
2040         if (ret)
2041                 return ret;
2042         if (vfd->vfl_type == VFL_TYPE_SDR) {
2043                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2044                         return -EINVAL;
2045         } else {
2046                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2047                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2048                 if (type != p->type)
2049                         return -EINVAL;
2050         }
2051         return ops->vidioc_s_frequency(file, fh, p);
2052 }
2053
2054 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
2055                                 struct file *file, void *fh, void *arg)
2056 {
2057         struct video_device *vfd = video_devdata(file);
2058         struct v4l2_standard *p = arg;
2059
2060         return v4l_video_std_enumstd(p, vfd->tvnorms);
2061 }
2062
2063 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
2064                                 struct file *file, void *fh, void *arg)
2065 {
2066         struct video_device *vfd = video_devdata(file);
2067         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
2068         int ret;
2069
2070         ret = v4l_enable_media_source(vfd);
2071         if (ret)
2072                 return ret;
2073         norm = id & vfd->tvnorms;
2074         if (vfd->tvnorms && !norm)      /* Check if std is supported */
2075                 return -EINVAL;
2076
2077         /* Calls the specific handler */
2078         return ops->vidioc_s_std(file, fh, norm);
2079 }
2080
2081 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
2082                                 struct file *file, void *fh, void *arg)
2083 {
2084         struct video_device *vfd = video_devdata(file);
2085         v4l2_std_id *p = arg;
2086         int ret;
2087
2088         ret = v4l_enable_media_source(vfd);
2089         if (ret)
2090                 return ret;
2091         /*
2092          * If no signal is detected, then the driver should return
2093          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
2094          * any standards that do not apply removed.
2095          *
2096          * This means that tuners, audio and video decoders can join
2097          * their efforts to improve the standards detection.
2098          */
2099         *p = vfd->tvnorms;
2100         return ops->vidioc_querystd(file, fh, arg);
2101 }
2102
2103 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2104                                 struct file *file, void *fh, void *arg)
2105 {
2106         struct video_device *vfd = video_devdata(file);
2107         struct v4l2_hw_freq_seek *p = arg;
2108         enum v4l2_tuner_type type;
2109         int ret;
2110
2111         ret = v4l_enable_media_source(vfd);
2112         if (ret)
2113                 return ret;
2114         /* s_hw_freq_seek is not supported for SDR for now */
2115         if (vfd->vfl_type == VFL_TYPE_SDR)
2116                 return -EINVAL;
2117
2118         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2119                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2120         if (p->type != type)
2121                 return -EINVAL;
2122         return ops->vidioc_s_hw_freq_seek(file, fh, p);
2123 }
2124
2125 static int v4l_s_fbuf(const struct v4l2_ioctl_ops *ops,
2126                       struct file *file, void *fh, void *arg)
2127 {
2128         struct v4l2_framebuffer *p = arg;
2129
2130         p->base = NULL;
2131         return ops->vidioc_s_fbuf(file, fh, p);
2132 }
2133
2134 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2135                                 struct file *file, void *fh, void *arg)
2136 {
2137         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2138 }
2139
2140 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2141                                 struct file *file, void *fh, void *arg)
2142 {
2143         struct video_device *vfd = video_devdata(file);
2144         struct v4l2_requestbuffers *p = arg;
2145         int ret = check_fmt(file, p->type);
2146
2147         if (ret)
2148                 return ret;
2149
2150         memset_after(p, 0, flags);
2151
2152         p->capabilities = 0;
2153         if (is_valid_ioctl(vfd, VIDIOC_REMOVE_BUFS))
2154                 p->capabilities = V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS;
2155
2156         return ops->vidioc_reqbufs(file, fh, p);
2157 }
2158
2159 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2160                                 struct file *file, void *fh, void *arg)
2161 {
2162         struct v4l2_buffer *p = arg;
2163         int ret = check_fmt(file, p->type);
2164
2165         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2166 }
2167
2168 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2169                                 struct file *file, void *fh, void *arg)
2170 {
2171         struct v4l2_buffer *p = arg;
2172         int ret = check_fmt(file, p->type);
2173
2174         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2175 }
2176
2177 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2178                                 struct file *file, void *fh, void *arg)
2179 {
2180         struct v4l2_buffer *p = arg;
2181         int ret = check_fmt(file, p->type);
2182
2183         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2184 }
2185
2186 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2187                                 struct file *file, void *fh, void *arg)
2188 {
2189         struct video_device *vfd = video_devdata(file);
2190         struct v4l2_create_buffers *create = arg;
2191         int ret = check_fmt(file, create->format.type);
2192
2193         if (ret)
2194                 return ret;
2195
2196         memset_after(create, 0, flags);
2197
2198         v4l_sanitize_format(&create->format);
2199
2200         create->capabilities = 0;
2201         if (is_valid_ioctl(vfd, VIDIOC_REMOVE_BUFS))
2202                 create->capabilities = V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS;
2203
2204         ret = ops->vidioc_create_bufs(file, fh, create);
2205
2206         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2207             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2208                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2209
2210         return ret;
2211 }
2212
2213 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2214                                 struct file *file, void *fh, void *arg)
2215 {
2216         struct v4l2_buffer *b = arg;
2217         int ret = check_fmt(file, b->type);
2218
2219         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2220 }
2221
2222 static int v4l_remove_bufs(const struct v4l2_ioctl_ops *ops,
2223                            struct file *file, void *fh, void *arg)
2224 {
2225         struct v4l2_remove_buffers *remove = arg;
2226
2227         if (ops->vidioc_remove_bufs)
2228                 return ops->vidioc_remove_bufs(file, fh, remove);
2229
2230         return -ENOTTY;
2231 }
2232
2233 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2234                                 struct file *file, void *fh, void *arg)
2235 {
2236         struct video_device *vfd = video_devdata(file);
2237         struct v4l2_streamparm *p = arg;
2238         v4l2_std_id std;
2239         int ret = check_fmt(file, p->type);
2240
2241         if (ret)
2242                 return ret;
2243         if (ops->vidioc_g_parm)
2244                 return ops->vidioc_g_parm(file, fh, p);
2245         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2246             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2247                 return -EINVAL;
2248         if (vfd->device_caps & V4L2_CAP_READWRITE)
2249                 p->parm.capture.readbuffers = 2;
2250         ret = ops->vidioc_g_std(file, fh, &std);
2251         if (ret == 0)
2252                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2253         return ret;
2254 }
2255
2256 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2257                                 struct file *file, void *fh, void *arg)
2258 {
2259         struct v4l2_streamparm *p = arg;
2260         int ret = check_fmt(file, p->type);
2261
2262         if (ret)
2263                 return ret;
2264
2265         /* Note: extendedmode is never used in drivers */
2266         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2267                 memset(p->parm.output.reserved, 0,
2268                        sizeof(p->parm.output.reserved));
2269                 p->parm.output.extendedmode = 0;
2270                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2271         } else {
2272                 memset(p->parm.capture.reserved, 0,
2273                        sizeof(p->parm.capture.reserved));
2274                 p->parm.capture.extendedmode = 0;
2275                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2276         }
2277         return ops->vidioc_s_parm(file, fh, p);
2278 }
2279
2280 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2281                                 struct file *file, void *fh, void *arg)
2282 {
2283         struct video_device *vfd = video_devdata(file);
2284         struct v4l2_queryctrl *p = arg;
2285         struct v4l2_fh *vfh =
2286                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2287
2288         if (vfh && vfh->ctrl_handler)
2289                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2290         if (vfd->ctrl_handler)
2291                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2292         if (ops->vidioc_queryctrl)
2293                 return ops->vidioc_queryctrl(file, fh, p);
2294         return -ENOTTY;
2295 }
2296
2297 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2298                                 struct file *file, void *fh, void *arg)
2299 {
2300         struct video_device *vfd = video_devdata(file);
2301         struct v4l2_query_ext_ctrl *p = arg;
2302         struct v4l2_fh *vfh =
2303                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2304
2305         if (vfh && vfh->ctrl_handler)
2306                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2307         if (vfd->ctrl_handler)
2308                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2309         if (ops->vidioc_query_ext_ctrl)
2310                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2311         return -ENOTTY;
2312 }
2313
2314 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2315                                 struct file *file, void *fh, void *arg)
2316 {
2317         struct video_device *vfd = video_devdata(file);
2318         struct v4l2_querymenu *p = arg;
2319         struct v4l2_fh *vfh =
2320                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2321
2322         if (vfh && vfh->ctrl_handler)
2323                 return v4l2_querymenu(vfh->ctrl_handler, p);
2324         if (vfd->ctrl_handler)
2325                 return v4l2_querymenu(vfd->ctrl_handler, p);
2326         if (ops->vidioc_querymenu)
2327                 return ops->vidioc_querymenu(file, fh, p);
2328         return -ENOTTY;
2329 }
2330
2331 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2332                                 struct file *file, void *fh, void *arg)
2333 {
2334         struct video_device *vfd = video_devdata(file);
2335         struct v4l2_control *p = arg;
2336         struct v4l2_fh *vfh =
2337                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2338         struct v4l2_ext_controls ctrls;
2339         struct v4l2_ext_control ctrl;
2340
2341         if (vfh && vfh->ctrl_handler)
2342                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2343         if (vfd->ctrl_handler)
2344                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2345         if (ops->vidioc_g_ctrl)
2346                 return ops->vidioc_g_ctrl(file, fh, p);
2347         if (ops->vidioc_g_ext_ctrls == NULL)
2348                 return -ENOTTY;
2349
2350         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2351         ctrls.count = 1;
2352         ctrls.controls = &ctrl;
2353         ctrl.id = p->id;
2354         ctrl.value = p->value;
2355         if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
2356                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2357
2358                 if (ret == 0)
2359                         p->value = ctrl.value;
2360                 return ret;
2361         }
2362         return -EINVAL;
2363 }
2364
2365 static int v4l_s_ctrl(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_control *p = arg;
2370         struct v4l2_fh *vfh =
2371                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2372         struct v4l2_ext_controls ctrls;
2373         struct v4l2_ext_control ctrl;
2374         int ret;
2375
2376         if (vfh && vfh->ctrl_handler)
2377                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2378         if (vfd->ctrl_handler)
2379                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2380         if (ops->vidioc_s_ctrl)
2381                 return ops->vidioc_s_ctrl(file, fh, p);
2382         if (ops->vidioc_s_ext_ctrls == NULL)
2383                 return -ENOTTY;
2384
2385         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2386         ctrls.count = 1;
2387         ctrls.controls = &ctrl;
2388         ctrl.id = p->id;
2389         ctrl.value = p->value;
2390         if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
2391                 return -EINVAL;
2392         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2393         p->value = ctrl.value;
2394         return ret;
2395 }
2396
2397 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2398                                 struct file *file, void *fh, void *arg)
2399 {
2400         struct video_device *vfd = video_devdata(file);
2401         struct v4l2_ext_controls *p = arg;
2402         struct v4l2_fh *vfh =
2403                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2404
2405         p->error_idx = p->count;
2406         if (vfh && vfh->ctrl_handler)
2407                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2408                                         vfd, vfd->v4l2_dev->mdev, p);
2409         if (vfd->ctrl_handler)
2410                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2411                                         vfd, vfd->v4l2_dev->mdev, p);
2412         if (ops->vidioc_g_ext_ctrls == NULL)
2413                 return -ENOTTY;
2414         return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
2415                                 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2416 }
2417
2418 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2419                                 struct file *file, void *fh, void *arg)
2420 {
2421         struct video_device *vfd = video_devdata(file);
2422         struct v4l2_ext_controls *p = arg;
2423         struct v4l2_fh *vfh =
2424                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2425
2426         p->error_idx = p->count;
2427         if (vfh && vfh->ctrl_handler)
2428                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2429                                         vfd, vfd->v4l2_dev->mdev, p);
2430         if (vfd->ctrl_handler)
2431                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2432                                         vfd, vfd->v4l2_dev->mdev, p);
2433         if (ops->vidioc_s_ext_ctrls == NULL)
2434                 return -ENOTTY;
2435         return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
2436                                 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2437 }
2438
2439 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2440                                 struct file *file, void *fh, void *arg)
2441 {
2442         struct video_device *vfd = video_devdata(file);
2443         struct v4l2_ext_controls *p = arg;
2444         struct v4l2_fh *vfh =
2445                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2446
2447         p->error_idx = p->count;
2448         if (vfh && vfh->ctrl_handler)
2449                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2450                                           vfd, vfd->v4l2_dev->mdev, p);
2451         if (vfd->ctrl_handler)
2452                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2453                                           vfd, vfd->v4l2_dev->mdev, p);
2454         if (ops->vidioc_try_ext_ctrls == NULL)
2455                 return -ENOTTY;
2456         return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
2457                         ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2458 }
2459
2460 /*
2461  * The selection API specified originally that the _MPLANE buffer types
2462  * shouldn't be used. The reasons for this are lost in the mists of time
2463  * (or just really crappy memories). Regardless, this is really annoying
2464  * for userspace. So to keep things simple we map _MPLANE buffer types
2465  * to their 'regular' counterparts before calling the driver. And we
2466  * restore it afterwards. This way applications can use either buffer
2467  * type and drivers don't need to check for both.
2468  */
2469 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2470                            struct file *file, void *fh, void *arg)
2471 {
2472         struct v4l2_selection *p = arg;
2473         u32 old_type = p->type;
2474         int ret;
2475
2476         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2477                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2478         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2479                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2480         ret = ops->vidioc_g_selection(file, fh, p);
2481         p->type = old_type;
2482         return ret;
2483 }
2484
2485 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2486                            struct file *file, void *fh, void *arg)
2487 {
2488         struct v4l2_selection *p = arg;
2489         u32 old_type = p->type;
2490         int ret;
2491
2492         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2493                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2494         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2495                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2496         ret = ops->vidioc_s_selection(file, fh, p);
2497         p->type = old_type;
2498         return ret;
2499 }
2500
2501 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2502                                 struct file *file, void *fh, void *arg)
2503 {
2504         struct video_device *vfd = video_devdata(file);
2505         struct v4l2_crop *p = arg;
2506         struct v4l2_selection s = {
2507                 .type = p->type,
2508         };
2509         int ret;
2510
2511         /* simulate capture crop using selection api */
2512
2513         /* crop means compose for output devices */
2514         if (V4L2_TYPE_IS_OUTPUT(p->type))
2515                 s.target = V4L2_SEL_TGT_COMPOSE;
2516         else
2517                 s.target = V4L2_SEL_TGT_CROP;
2518
2519         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2520                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2521                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2522
2523         ret = v4l_g_selection(ops, file, fh, &s);
2524
2525         /* copying results to old structure on success */
2526         if (!ret)
2527                 p->c = s.r;
2528         return ret;
2529 }
2530
2531 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2532                                 struct file *file, void *fh, void *arg)
2533 {
2534         struct video_device *vfd = video_devdata(file);
2535         struct v4l2_crop *p = arg;
2536         struct v4l2_selection s = {
2537                 .type = p->type,
2538                 .r = p->c,
2539         };
2540
2541         /* simulate capture crop using selection api */
2542
2543         /* crop means compose for output devices */
2544         if (V4L2_TYPE_IS_OUTPUT(p->type))
2545                 s.target = V4L2_SEL_TGT_COMPOSE;
2546         else
2547                 s.target = V4L2_SEL_TGT_CROP;
2548
2549         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2550                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2551                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2552
2553         return v4l_s_selection(ops, file, fh, &s);
2554 }
2555
2556 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2557                                 struct file *file, void *fh, void *arg)
2558 {
2559         struct video_device *vfd = video_devdata(file);
2560         struct v4l2_cropcap *p = arg;
2561         struct v4l2_selection s = { .type = p->type };
2562         int ret = 0;
2563
2564         /* setting trivial pixelaspect */
2565         p->pixelaspect.numerator = 1;
2566         p->pixelaspect.denominator = 1;
2567
2568         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2569                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2570         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2571                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2572
2573         /*
2574          * The determine_valid_ioctls() call already should ensure
2575          * that this can never happen, but just in case...
2576          */
2577         if (WARN_ON(!ops->vidioc_g_selection))
2578                 return -ENOTTY;
2579
2580         if (ops->vidioc_g_pixelaspect)
2581                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2582                                                 &p->pixelaspect);
2583
2584         /*
2585          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2586          * square pixel aspect ratio in that case.
2587          */
2588         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2589                 return ret;
2590
2591         /* Use g_selection() to fill in the bounds and defrect rectangles */
2592
2593         /* obtaining bounds */
2594         if (V4L2_TYPE_IS_OUTPUT(p->type))
2595                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2596         else
2597                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2598
2599         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2600                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2601                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2602
2603         ret = v4l_g_selection(ops, file, fh, &s);
2604         if (ret)
2605                 return ret;
2606         p->bounds = s.r;
2607
2608         /* obtaining defrect */
2609         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2610                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2611         else
2612                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2613
2614         ret = v4l_g_selection(ops, file, fh, &s);
2615         if (ret)
2616                 return ret;
2617         p->defrect = s.r;
2618
2619         return 0;
2620 }
2621
2622 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2623                                 struct file *file, void *fh, void *arg)
2624 {
2625         struct video_device *vfd = video_devdata(file);
2626         int ret;
2627
2628         if (vfd->v4l2_dev)
2629                 pr_info("%s: =================  START STATUS  =================\n",
2630                         vfd->v4l2_dev->name);
2631         ret = ops->vidioc_log_status(file, fh);
2632         if (vfd->v4l2_dev)
2633                 pr_info("%s: ==================  END STATUS  ==================\n",
2634                         vfd->v4l2_dev->name);
2635         return ret;
2636 }
2637
2638 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2639                                 struct file *file, void *fh, void *arg)
2640 {
2641 #ifdef CONFIG_VIDEO_ADV_DEBUG
2642         struct v4l2_dbg_register *p = arg;
2643         struct video_device *vfd = video_devdata(file);
2644         struct v4l2_subdev *sd;
2645         int idx = 0;
2646
2647         if (!capable(CAP_SYS_ADMIN))
2648                 return -EPERM;
2649         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2650                 if (vfd->v4l2_dev == NULL)
2651                         return -EINVAL;
2652                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2653                         if (p->match.addr == idx++)
2654                                 return v4l2_subdev_call(sd, core, g_register, p);
2655                 return -EINVAL;
2656         }
2657         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2658             (ops->vidioc_g_chip_info || p->match.addr == 0))
2659                 return ops->vidioc_g_register(file, fh, p);
2660         return -EINVAL;
2661 #else
2662         return -ENOTTY;
2663 #endif
2664 }
2665
2666 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2667                                 struct file *file, void *fh, void *arg)
2668 {
2669 #ifdef CONFIG_VIDEO_ADV_DEBUG
2670         const struct v4l2_dbg_register *p = arg;
2671         struct video_device *vfd = video_devdata(file);
2672         struct v4l2_subdev *sd;
2673         int idx = 0;
2674
2675         if (!capable(CAP_SYS_ADMIN))
2676                 return -EPERM;
2677         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2678                 if (vfd->v4l2_dev == NULL)
2679                         return -EINVAL;
2680                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2681                         if (p->match.addr == idx++)
2682                                 return v4l2_subdev_call(sd, core, s_register, p);
2683                 return -EINVAL;
2684         }
2685         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2686             (ops->vidioc_g_chip_info || p->match.addr == 0))
2687                 return ops->vidioc_s_register(file, fh, p);
2688         return -EINVAL;
2689 #else
2690         return -ENOTTY;
2691 #endif
2692 }
2693
2694 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2695                                 struct file *file, void *fh, void *arg)
2696 {
2697 #ifdef CONFIG_VIDEO_ADV_DEBUG
2698         struct video_device *vfd = video_devdata(file);
2699         struct v4l2_dbg_chip_info *p = arg;
2700         struct v4l2_subdev *sd;
2701         int idx = 0;
2702
2703         switch (p->match.type) {
2704         case V4L2_CHIP_MATCH_BRIDGE:
2705                 if (ops->vidioc_s_register)
2706                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2707                 if (ops->vidioc_g_register)
2708                         p->flags |= V4L2_CHIP_FL_READABLE;
2709                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2710                 if (ops->vidioc_g_chip_info)
2711                         return ops->vidioc_g_chip_info(file, fh, arg);
2712                 if (p->match.addr)
2713                         return -EINVAL;
2714                 return 0;
2715
2716         case V4L2_CHIP_MATCH_SUBDEV:
2717                 if (vfd->v4l2_dev == NULL)
2718                         break;
2719                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2720                         if (p->match.addr != idx++)
2721                                 continue;
2722                         if (sd->ops->core && sd->ops->core->s_register)
2723                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2724                         if (sd->ops->core && sd->ops->core->g_register)
2725                                 p->flags |= V4L2_CHIP_FL_READABLE;
2726                         strscpy(p->name, sd->name, sizeof(p->name));
2727                         return 0;
2728                 }
2729                 break;
2730         }
2731         return -EINVAL;
2732 #else
2733         return -ENOTTY;
2734 #endif
2735 }
2736
2737 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2738                                 struct file *file, void *fh, void *arg)
2739 {
2740         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2741 }
2742
2743 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2744                                 struct file *file, void *fh, void *arg)
2745 {
2746         return ops->vidioc_subscribe_event(fh, arg);
2747 }
2748
2749 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2750                                 struct file *file, void *fh, void *arg)
2751 {
2752         return ops->vidioc_unsubscribe_event(fh, arg);
2753 }
2754
2755 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2756                                 struct file *file, void *fh, void *arg)
2757 {
2758         struct v4l2_sliced_vbi_cap *p = arg;
2759         int ret = check_fmt(file, p->type);
2760
2761         if (ret)
2762                 return ret;
2763
2764         /* Clear up to type, everything after type is zeroed already */
2765         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2766
2767         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2768 }
2769
2770 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2771                                 struct file *file, void *fh, void *arg)
2772 {
2773         struct video_device *vfd = video_devdata(file);
2774         struct v4l2_frequency_band *p = arg;
2775         enum v4l2_tuner_type type;
2776         int err;
2777
2778         if (vfd->vfl_type == VFL_TYPE_SDR) {
2779                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2780                         return -EINVAL;
2781                 type = p->type;
2782         } else {
2783                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2784                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2785                 if (type != p->type)
2786                         return -EINVAL;
2787         }
2788         if (ops->vidioc_enum_freq_bands) {
2789                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2790                 if (err != -ENOTTY)
2791                         return err;
2792         }
2793         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2794                 struct v4l2_tuner t = {
2795                         .index = p->tuner,
2796                         .type = type,
2797                 };
2798
2799                 if (p->index)
2800                         return -EINVAL;
2801                 err = ops->vidioc_g_tuner(file, fh, &t);
2802                 if (err)
2803                         return err;
2804                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2805                 p->rangelow = t.rangelow;
2806                 p->rangehigh = t.rangehigh;
2807                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2808                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2809                 return 0;
2810         }
2811         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2812                 struct v4l2_modulator m = {
2813                         .index = p->tuner,
2814                 };
2815
2816                 if (type != V4L2_TUNER_RADIO)
2817                         return -EINVAL;
2818                 if (p->index)
2819                         return -EINVAL;
2820                 err = ops->vidioc_g_modulator(file, fh, &m);
2821                 if (err)
2822                         return err;
2823                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2824                 p->rangelow = m.rangelow;
2825                 p->rangehigh = m.rangehigh;
2826                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2827                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2828                 return 0;
2829         }
2830         return -ENOTTY;
2831 }
2832
2833 struct v4l2_ioctl_info {
2834         unsigned int ioctl;
2835         u32 flags;
2836         const char * const name;
2837         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2838                     void *fh, void *p);
2839         void (*debug)(const void *arg, bool write_only);
2840 };
2841
2842 /* This control needs a priority check */
2843 #define INFO_FL_PRIO            (1 << 0)
2844 /* This control can be valid if the filehandle passes a control handler. */
2845 #define INFO_FL_CTRL            (1 << 1)
2846 /* Queuing ioctl */
2847 #define INFO_FL_QUEUE           (1 << 2)
2848 /* Always copy back result, even on error */
2849 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2850 /* Zero struct from after the field to the end */
2851 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2852         ((offsetof(struct v4l2_struct, field) +                 \
2853           sizeof_field(struct v4l2_struct, field)) << 16)
2854 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2855
2856 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2857         static int v4l_stub_ ## _vidioc(                        \
2858                         const struct v4l2_ioctl_ops *ops,       \
2859                         struct file *file, void *fh, void *p)   \
2860         {                                                       \
2861                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2862         }
2863
2864 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2865         [_IOC_NR(_ioctl)] = {                                   \
2866                 .ioctl = _ioctl,                                \
2867                 .flags = _flags,                                \
2868                 .name = #_ioctl,                                \
2869                 .func = _func,                                  \
2870                 .debug = _debug,                                \
2871         }
2872
2873 DEFINE_V4L_STUB_FUNC(g_fbuf)
2874 DEFINE_V4L_STUB_FUNC(expbuf)
2875 DEFINE_V4L_STUB_FUNC(g_std)
2876 DEFINE_V4L_STUB_FUNC(g_audio)
2877 DEFINE_V4L_STUB_FUNC(s_audio)
2878 DEFINE_V4L_STUB_FUNC(g_edid)
2879 DEFINE_V4L_STUB_FUNC(s_edid)
2880 DEFINE_V4L_STUB_FUNC(g_audout)
2881 DEFINE_V4L_STUB_FUNC(s_audout)
2882 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2883 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2884 DEFINE_V4L_STUB_FUNC(enumaudio)
2885 DEFINE_V4L_STUB_FUNC(enumaudout)
2886 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2887 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2888 DEFINE_V4L_STUB_FUNC(g_enc_index)
2889 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2890 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2891 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2892 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2893 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2894 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2895 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2896 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2897 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2898
2899 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2900         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2901         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2902         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2903         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2904         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2905         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2906         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2907         IOCTL_INFO(VIDIOC_S_FBUF, v4l_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2908         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2909         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2910         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2911         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2912         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2913         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2914         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2915         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2916         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2917         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2918         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2919         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2920         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2921         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2922         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2923         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2924         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2925         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2926         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2927         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2928         IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2929         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2930         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2931         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2932         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2933         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2934         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2935         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2936         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2937         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2938         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2939         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2940         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2941         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2942         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2943         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2944         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2945         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2946         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2947         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2948         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2949         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2950         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2951         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2952         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2953         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2954         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)),
2955         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2956         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2957         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2958         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2959         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2960         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2961         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2962         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2963         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2964         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2965         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2966         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2967         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2968         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2969         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)),
2970         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2971         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2972         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2973         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2974         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2975         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2976         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2977         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2978         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2979         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2980         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)),
2981         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)),
2982         IOCTL_INFO(VIDIOC_REMOVE_BUFS, v4l_remove_bufs, v4l_print_remove_buffers, INFO_FL_PRIO | INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_remove_buffers, type)),
2983 };
2984 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2985
2986 static bool v4l2_is_known_ioctl(unsigned int cmd)
2987 {
2988         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2989                 return false;
2990         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2991 }
2992
2993 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2994                                          struct v4l2_fh *vfh, unsigned int cmd,
2995                                          void *arg)
2996 {
2997         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2998                 return vdev->lock;
2999         if (vfh && vfh->m2m_ctx &&
3000             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
3001                 if (vfh->m2m_ctx->q_lock)
3002                         return vfh->m2m_ctx->q_lock;
3003         }
3004         if (vdev->queue && vdev->queue->lock &&
3005                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
3006                 return vdev->queue->lock;
3007         return vdev->lock;
3008 }
3009
3010 /* Common ioctl debug function. This function can be used by
3011    external ioctl messages as well as internal V4L ioctl */
3012 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
3013 {
3014         const char *dir, *type;
3015
3016         if (prefix)
3017                 printk(KERN_DEBUG "%s: ", prefix);
3018
3019         switch (_IOC_TYPE(cmd)) {
3020         case 'd':
3021                 type = "v4l2_int";
3022                 break;
3023         case 'V':
3024                 if (!v4l2_is_known_ioctl(cmd)) {
3025                         type = "v4l2";
3026                         break;
3027                 }
3028                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
3029                 return;
3030         default:
3031                 type = "unknown";
3032                 break;
3033         }
3034
3035         switch (_IOC_DIR(cmd)) {
3036         case _IOC_NONE:              dir = "--"; break;
3037         case _IOC_READ:              dir = "r-"; break;
3038         case _IOC_WRITE:             dir = "-w"; break;
3039         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
3040         default:                     dir = "*ERR*"; break;
3041         }
3042         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
3043                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
3044 }
3045 EXPORT_SYMBOL(v4l_printk_ioctl);
3046
3047 static long __video_do_ioctl(struct file *file,
3048                 unsigned int cmd, void *arg)
3049 {
3050         struct video_device *vfd = video_devdata(file);
3051         struct mutex *req_queue_lock = NULL;
3052         struct mutex *lock; /* ioctl serialization mutex */
3053         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
3054         bool write_only = false;
3055         struct v4l2_ioctl_info default_info;
3056         const struct v4l2_ioctl_info *info;
3057         void *fh = file->private_data;
3058         struct v4l2_fh *vfh = NULL;
3059         int dev_debug = vfd->dev_debug;
3060         long ret = -ENOTTY;
3061
3062         if (ops == NULL) {
3063                 pr_warn("%s: has no ioctl_ops.\n",
3064                                 video_device_node_name(vfd));
3065                 return ret;
3066         }
3067
3068         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
3069                 vfh = file->private_data;
3070
3071         /*
3072          * We need to serialize streamon/off with queueing new requests.
3073          * These ioctls may trigger the cancellation of a streaming
3074          * operation, and that should not be mixed with queueing a new
3075          * request at the same time.
3076          */
3077         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
3078             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
3079                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
3080
3081                 if (mutex_lock_interruptible(req_queue_lock))
3082                         return -ERESTARTSYS;
3083         }
3084
3085         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
3086
3087         if (lock && mutex_lock_interruptible(lock)) {
3088                 if (req_queue_lock)
3089                         mutex_unlock(req_queue_lock);
3090                 return -ERESTARTSYS;
3091         }
3092
3093         if (!video_is_registered(vfd)) {
3094                 ret = -ENODEV;
3095                 goto unlock;
3096         }
3097
3098         if (v4l2_is_known_ioctl(cmd)) {
3099                 info = &v4l2_ioctls[_IOC_NR(cmd)];
3100
3101                 if (!is_valid_ioctl(vfd, cmd) &&
3102                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
3103                         goto done;
3104
3105                 if (vfh && (info->flags & INFO_FL_PRIO)) {
3106                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
3107                         if (ret)
3108                                 goto done;
3109                 }
3110         } else {
3111                 default_info.ioctl = cmd;
3112                 default_info.flags = 0;
3113                 default_info.debug = v4l_print_default;
3114                 info = &default_info;
3115         }
3116
3117         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
3118         if (info != &default_info) {
3119                 ret = info->func(ops, file, fh, arg);
3120         } else if (!ops->vidioc_default) {
3121                 ret = -ENOTTY;
3122         } else {
3123                 ret = ops->vidioc_default(file, fh,
3124                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
3125                         cmd, arg);
3126         }
3127
3128 done:
3129         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
3130                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3131                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3132                         goto unlock;
3133
3134                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3135                 if (ret < 0)
3136                         pr_cont(": error %ld", ret);
3137                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3138                         pr_cont("\n");
3139                 else if (_IOC_DIR(cmd) == _IOC_NONE)
3140                         info->debug(arg, write_only);
3141                 else {
3142                         pr_cont(": ");
3143                         info->debug(arg, write_only);
3144                 }
3145         }
3146
3147 unlock:
3148         if (lock)
3149                 mutex_unlock(lock);
3150         if (req_queue_lock)
3151                 mutex_unlock(req_queue_lock);
3152         return ret;
3153 }
3154
3155 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3156                             void __user **user_ptr, void ***kernel_ptr)
3157 {
3158         int ret = 0;
3159
3160         switch (cmd) {
3161         case VIDIOC_PREPARE_BUF:
3162         case VIDIOC_QUERYBUF:
3163         case VIDIOC_QBUF:
3164         case VIDIOC_DQBUF: {
3165                 struct v4l2_buffer *buf = parg;
3166
3167                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3168                         if (buf->length > VIDEO_MAX_PLANES) {
3169                                 ret = -EINVAL;
3170                                 break;
3171                         }
3172                         *user_ptr = (void __user *)buf->m.planes;
3173                         *kernel_ptr = (void **)&buf->m.planes;
3174                         *array_size = sizeof(struct v4l2_plane) * buf->length;
3175                         ret = 1;
3176                 }
3177                 break;
3178         }
3179
3180         case VIDIOC_G_EDID:
3181         case VIDIOC_S_EDID: {
3182                 struct v4l2_edid *edid = parg;
3183
3184                 if (edid->blocks) {
3185                         if (edid->blocks > 256) {
3186                                 ret = -EINVAL;
3187                                 break;
3188                         }
3189                         *user_ptr = (void __user *)edid->edid;
3190                         *kernel_ptr = (void **)&edid->edid;
3191                         *array_size = edid->blocks * 128;
3192                         ret = 1;
3193                 }
3194                 break;
3195         }
3196
3197         case VIDIOC_S_EXT_CTRLS:
3198         case VIDIOC_G_EXT_CTRLS:
3199         case VIDIOC_TRY_EXT_CTRLS: {
3200                 struct v4l2_ext_controls *ctrls = parg;
3201
3202                 if (ctrls->count != 0) {
3203                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3204                                 ret = -EINVAL;
3205                                 break;
3206                         }
3207                         *user_ptr = (void __user *)ctrls->controls;
3208                         *kernel_ptr = (void **)&ctrls->controls;
3209                         *array_size = sizeof(struct v4l2_ext_control)
3210                                     * ctrls->count;
3211                         ret = 1;
3212                 }
3213                 break;
3214         }
3215
3216         case VIDIOC_SUBDEV_G_ROUTING:
3217         case VIDIOC_SUBDEV_S_ROUTING: {
3218                 struct v4l2_subdev_routing *routing = parg;
3219
3220                 if (routing->len_routes > 256)
3221                         return -E2BIG;
3222
3223                 *user_ptr = u64_to_user_ptr(routing->routes);
3224                 *kernel_ptr = (void **)&routing->routes;
3225                 *array_size = sizeof(struct v4l2_subdev_route)
3226                             * routing->len_routes;
3227                 ret = 1;
3228                 break;
3229         }
3230         }
3231
3232         return ret;
3233 }
3234
3235 static unsigned int video_translate_cmd(unsigned int cmd)
3236 {
3237 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3238         switch (cmd) {
3239         case VIDIOC_DQEVENT_TIME32:
3240                 return VIDIOC_DQEVENT;
3241         case VIDIOC_QUERYBUF_TIME32:
3242                 return VIDIOC_QUERYBUF;
3243         case VIDIOC_QBUF_TIME32:
3244                 return VIDIOC_QBUF;
3245         case VIDIOC_DQBUF_TIME32:
3246                 return VIDIOC_DQBUF;
3247         case VIDIOC_PREPARE_BUF_TIME32:
3248                 return VIDIOC_PREPARE_BUF;
3249         }
3250 #endif
3251         if (in_compat_syscall())
3252                 return v4l2_compat_translate_cmd(cmd);
3253
3254         return cmd;
3255 }
3256
3257 static int video_get_user(void __user *arg, void *parg,
3258                           unsigned int real_cmd, unsigned int cmd,
3259                           bool *always_copy)
3260 {
3261         unsigned int n = _IOC_SIZE(real_cmd);
3262         int err = 0;
3263
3264         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3265                 /* read-only ioctl */
3266                 memset(parg, 0, n);
3267                 return 0;
3268         }
3269
3270         /*
3271          * In some cases, only a few fields are used as input,
3272          * i.e. when the app sets "index" and then the driver
3273          * fills in the rest of the structure for the thing
3274          * with that index.  We only need to copy up the first
3275          * non-input field.
3276          */
3277         if (v4l2_is_known_ioctl(real_cmd)) {
3278                 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3279
3280                 if (flags & INFO_FL_CLEAR_MASK)
3281                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3282                 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3283         }
3284
3285         if (cmd == real_cmd) {
3286                 if (copy_from_user(parg, (void __user *)arg, n))
3287                         err = -EFAULT;
3288         } else if (in_compat_syscall()) {
3289                 memset(parg, 0, n);
3290                 err = v4l2_compat_get_user(arg, parg, cmd);
3291         } else {
3292                 memset(parg, 0, n);
3293 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3294                 switch (cmd) {
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_time32 vb32;
3300                         struct v4l2_buffer *vb = parg;
3301
3302                         if (copy_from_user(&vb32, arg, sizeof(vb32)))
3303                                 return -EFAULT;
3304
3305                         *vb = (struct v4l2_buffer) {
3306                                 .index          = vb32.index,
3307                                 .type           = vb32.type,
3308                                 .bytesused      = vb32.bytesused,
3309                                 .flags          = vb32.flags,
3310                                 .field          = vb32.field,
3311                                 .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3312                                 .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3313                                 .timecode       = vb32.timecode,
3314                                 .sequence       = vb32.sequence,
3315                                 .memory         = vb32.memory,
3316                                 .m.userptr      = vb32.m.userptr,
3317                                 .length         = vb32.length,
3318                                 .request_fd     = vb32.request_fd,
3319                         };
3320                         break;
3321                 }
3322                 }
3323 #endif
3324         }
3325
3326         /* zero out anything we don't copy from userspace */
3327         if (!err && n < _IOC_SIZE(real_cmd))
3328                 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3329         return err;
3330 }
3331
3332 static int video_put_user(void __user *arg, void *parg,
3333                           unsigned int real_cmd, unsigned int cmd)
3334 {
3335         if (!(_IOC_DIR(cmd) & _IOC_READ))
3336                 return 0;
3337
3338         if (cmd == real_cmd) {
3339                 /*  Copy results into user buffer  */
3340                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3341                         return -EFAULT;
3342                 return 0;
3343         }
3344
3345         if (in_compat_syscall())
3346                 return v4l2_compat_put_user(arg, parg, cmd);
3347
3348 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3349         switch (cmd) {
3350         case VIDIOC_DQEVENT_TIME32: {
3351                 struct v4l2_event *ev = parg;
3352                 struct v4l2_event_time32 ev32;
3353
3354                 memset(&ev32, 0, sizeof(ev32));
3355
3356                 ev32.type       = ev->type;
3357                 ev32.pending    = ev->pending;
3358                 ev32.sequence   = ev->sequence;
3359                 ev32.timestamp.tv_sec   = ev->timestamp.tv_sec;
3360                 ev32.timestamp.tv_nsec  = ev->timestamp.tv_nsec;
3361                 ev32.id         = ev->id;
3362
3363                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3364                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3365
3366                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3367                         return -EFAULT;
3368                 break;
3369         }
3370         case VIDIOC_QUERYBUF_TIME32:
3371         case VIDIOC_QBUF_TIME32:
3372         case VIDIOC_DQBUF_TIME32:
3373         case VIDIOC_PREPARE_BUF_TIME32: {
3374                 struct v4l2_buffer *vb = parg;
3375                 struct v4l2_buffer_time32 vb32;
3376
3377                 memset(&vb32, 0, sizeof(vb32));
3378
3379                 vb32.index      = vb->index;
3380                 vb32.type       = vb->type;
3381                 vb32.bytesused  = vb->bytesused;
3382                 vb32.flags      = vb->flags;
3383                 vb32.field      = vb->field;
3384                 vb32.timestamp.tv_sec   = vb->timestamp.tv_sec;
3385                 vb32.timestamp.tv_usec  = vb->timestamp.tv_usec;
3386                 vb32.timecode   = vb->timecode;
3387                 vb32.sequence   = vb->sequence;
3388                 vb32.memory     = vb->memory;
3389                 vb32.m.userptr  = vb->m.userptr;
3390                 vb32.length     = vb->length;
3391                 vb32.request_fd = vb->request_fd;
3392
3393                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3394                         return -EFAULT;
3395                 break;
3396         }
3397         }
3398 #endif
3399
3400         return 0;
3401 }
3402
3403 long
3404 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3405                v4l2_kioctl func)
3406 {
3407         char    sbuf[128];
3408         void    *mbuf = NULL, *array_buf = NULL;
3409         void    *parg = (void *)arg;
3410         long    err  = -EINVAL;
3411         bool    has_array_args;
3412         bool    always_copy = false;
3413         size_t  array_size = 0;
3414         void __user *user_ptr = NULL;
3415         void    **kernel_ptr = NULL;
3416         unsigned int cmd = video_translate_cmd(orig_cmd);
3417         const size_t ioc_size = _IOC_SIZE(cmd);
3418
3419         /*  Copy arguments into temp kernel buffer  */
3420         if (_IOC_DIR(cmd) != _IOC_NONE) {
3421                 if (ioc_size <= sizeof(sbuf)) {
3422                         parg = sbuf;
3423                 } else {
3424                         /* too big to allocate from stack */
3425                         mbuf = kmalloc(ioc_size, GFP_KERNEL);
3426                         if (NULL == mbuf)
3427                                 return -ENOMEM;
3428                         parg = mbuf;
3429                 }
3430
3431                 err = video_get_user((void __user *)arg, parg, cmd,
3432                                      orig_cmd, &always_copy);
3433                 if (err)
3434                         goto out;
3435         }
3436
3437         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3438         if (err < 0)
3439                 goto out;
3440         has_array_args = err;
3441
3442         if (has_array_args) {
3443                 array_buf = kvmalloc(array_size, GFP_KERNEL);
3444                 err = -ENOMEM;
3445                 if (array_buf == NULL)
3446                         goto out;
3447                 if (in_compat_syscall())
3448                         err = v4l2_compat_get_array_args(file, array_buf,
3449                                                          user_ptr, array_size,
3450                                                          orig_cmd, parg);
3451                 else
3452                         err = copy_from_user(array_buf, user_ptr, array_size) ?
3453                                                                 -EFAULT : 0;
3454                 if (err)
3455                         goto out;
3456                 *kernel_ptr = array_buf;
3457         }
3458
3459         /* Handles IOCTL */
3460         err = func(file, cmd, parg);
3461         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3462                 err = -ENOTTY;
3463                 goto out;
3464         }
3465
3466         if (err == 0) {
3467                 if (cmd == VIDIOC_DQBUF)
3468                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3469                 else if (cmd == VIDIOC_QBUF)
3470                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3471         }
3472
3473         /*
3474          * Some ioctls can return an error, but still have valid
3475          * results that must be returned.
3476          *
3477          * FIXME: subdev IOCTLS are partially handled here and partially in
3478          * v4l2-subdev.c and the 'always_copy' flag can only be set for IOCTLS
3479          * defined here as part of the 'v4l2_ioctls' array. As
3480          * VIDIOC_SUBDEV_[GS]_ROUTING needs to return results to applications
3481          * even in case of failure, but it is not defined here as part of the
3482          * 'v4l2_ioctls' array, insert an ad-hoc check to address that.
3483          */
3484         if (cmd == VIDIOC_SUBDEV_G_ROUTING || cmd == VIDIOC_SUBDEV_S_ROUTING)
3485                 always_copy = true;
3486
3487         if (err < 0 && !always_copy)
3488                 goto out;
3489
3490         if (has_array_args) {
3491                 *kernel_ptr = (void __force *)user_ptr;
3492                 if (in_compat_syscall()) {
3493                         int put_err;
3494
3495                         put_err = v4l2_compat_put_array_args(file, user_ptr,
3496                                                              array_buf,
3497                                                              array_size,
3498                                                              orig_cmd, parg);
3499                         if (put_err)
3500                                 err = put_err;
3501                 } else if (copy_to_user(user_ptr, array_buf, array_size)) {
3502                         err = -EFAULT;
3503                 }
3504         }
3505
3506         if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3507                 err = -EFAULT;
3508 out:
3509         kvfree(array_buf);
3510         kfree(mbuf);
3511         return err;
3512 }
3513
3514 long video_ioctl2(struct file *file,
3515                unsigned int cmd, unsigned long arg)
3516 {
3517         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3518 }
3519 EXPORT_SYMBOL(video_ioctl2);