linux/drivers/media/v4l2-core/v4l2-ioctl.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Video capture interface for Linux version 2
   4 *
   5 * A generic framework to process V4L2 ioctl commands.
   6 *
   7 * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
   8 *              Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
   9 */
  10
  11#include <linux/mm.h>
  12#include <linux/module.h>
  13#include <linux/slab.h>
  14#include <linux/types.h>
  15#include <linux/kernel.h>
  16#include <linux/version.h>
  17
  18#include <linux/videodev2.h>
  19
  20#include <media/v4l2-common.h>
  21#include <media/v4l2-ioctl.h>
  22#include <media/v4l2-ctrls.h>
  23#include <media/v4l2-fh.h>
  24#include <media/v4l2-event.h>
  25#include <media/v4l2-device.h>
  26#include <media/videobuf2-v4l2.h>
  27#include <media/v4l2-mc.h>
  28#include <media/v4l2-mem2mem.h>
  29
  30#include <trace/events/v4l2.h>
  31
  32/* Zero out the end of the struct pointed to by p.  Everything after, but
  33 * not including, the specified field is cleared. */
  34#define CLEAR_AFTER_FIELD(p, field) \
  35        memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  36        0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  37
  38#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  39
  40struct std_descr {
  41        v4l2_std_id std;
  42        const char *descr;
  43};
  44
  45static const struct std_descr standards[] = {
  46        { V4L2_STD_NTSC,        "NTSC"      },
  47        { V4L2_STD_NTSC_M,      "NTSC-M"    },
  48        { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  49        { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  50        { V4L2_STD_NTSC_443,    "NTSC-443"  },
  51        { V4L2_STD_PAL,         "PAL"       },
  52        { V4L2_STD_PAL_BG,      "PAL-BG"    },
  53        { V4L2_STD_PAL_B,       "PAL-B"     },
  54        { V4L2_STD_PAL_B1,      "PAL-B1"    },
  55        { V4L2_STD_PAL_G,       "PAL-G"     },
  56        { V4L2_STD_PAL_H,       "PAL-H"     },
  57        { V4L2_STD_PAL_I,       "PAL-I"     },
  58        { V4L2_STD_PAL_DK,      "PAL-DK"    },
  59        { V4L2_STD_PAL_D,       "PAL-D"     },
  60        { V4L2_STD_PAL_D1,      "PAL-D1"    },
  61        { V4L2_STD_PAL_K,       "PAL-K"     },
  62        { V4L2_STD_PAL_M,       "PAL-M"     },
  63        { V4L2_STD_PAL_N,       "PAL-N"     },
  64        { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  65        { V4L2_STD_PAL_60,      "PAL-60"    },
  66        { V4L2_STD_SECAM,       "SECAM"     },
  67        { V4L2_STD_SECAM_B,     "SECAM-B"   },
  68        { V4L2_STD_SECAM_G,     "SECAM-G"   },
  69        { V4L2_STD_SECAM_H,     "SECAM-H"   },
  70        { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  71        { V4L2_STD_SECAM_D,     "SECAM-D"   },
  72        { V4L2_STD_SECAM_K,     "SECAM-K"   },
  73        { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  74        { V4L2_STD_SECAM_L,     "SECAM-L"   },
  75        { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  76        { 0,                    "Unknown"   }
  77};
  78
  79/* video4linux standard ID conversion to standard name
  80 */
  81const char *v4l2_norm_to_name(v4l2_std_id id)
  82{
  83        u32 myid = id;
  84        int i;
  85
  86        /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  87           64 bit comparisons. So, on that architecture, with some gcc
  88           variants, compilation fails. Currently, the max value is 30bit wide.
  89         */
  90        BUG_ON(myid != id);
  91
  92        for (i = 0; standards[i].std; i++)
  93                if (myid == standards[i].std)
  94                        break;
  95        return standards[i].descr;
  96}
  97EXPORT_SYMBOL(v4l2_norm_to_name);
  98
  99/* Returns frame period for the given standard */
 100void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 101{
 102        if (id & V4L2_STD_525_60) {
 103                frameperiod->numerator = 1001;
 104                frameperiod->denominator = 30000;
 105        } else {
 106                frameperiod->numerator = 1;
 107                frameperiod->denominator = 25;
 108        }
 109}
 110EXPORT_SYMBOL(v4l2_video_std_frame_period);
 111
 112/* Fill in the fields of a v4l2_standard structure according to the
 113   'id' and 'transmission' parameters.  Returns negative on error.  */
 114int v4l2_video_std_construct(struct v4l2_standard *vs,
 115                             int id, const char *name)
 116{
 117        vs->id = id;
 118        v4l2_video_std_frame_period(id, &vs->frameperiod);
 119        vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 120        strscpy(vs->name, name, sizeof(vs->name));
 121        return 0;
 122}
 123EXPORT_SYMBOL(v4l2_video_std_construct);
 124
 125/* Fill in the fields of a v4l2_standard structure according to the
 126 * 'id' and 'vs->index' parameters. Returns negative on error. */
 127int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 128{
 129        v4l2_std_id curr_id = 0;
 130        unsigned int index = vs->index, i, j = 0;
 131        const char *descr = "";
 132
 133        /* Return -ENODATA if the id for the current input
 134           or output is 0, meaning that it doesn't support this API. */
 135        if (id == 0)
 136                return -ENODATA;
 137
 138        /* Return norm array in a canonical way */
 139        for (i = 0; i <= index && id; i++) {
 140                /* last std value in the standards array is 0, so this
 141                   while always ends there since (id & 0) == 0. */
 142                while ((id & standards[j].std) != standards[j].std)
 143                        j++;
 144                curr_id = standards[j].std;
 145                descr = standards[j].descr;
 146                j++;
 147                if (curr_id == 0)
 148                        break;
 149                if (curr_id != V4L2_STD_PAL &&
 150                                curr_id != V4L2_STD_SECAM &&
 151                                curr_id != V4L2_STD_NTSC)
 152                        id &= ~curr_id;
 153        }
 154        if (i <= index)
 155                return -EINVAL;
 156
 157        v4l2_video_std_construct(vs, curr_id, descr);
 158        return 0;
 159}
 160
 161/* ----------------------------------------------------------------- */
 162/* some arrays for pretty-printing debug messages of enum types      */
 163
 164const char *v4l2_field_names[] = {
 165        [V4L2_FIELD_ANY]        = "any",
 166        [V4L2_FIELD_NONE]       = "none",
 167        [V4L2_FIELD_TOP]        = "top",
 168        [V4L2_FIELD_BOTTOM]     = "bottom",
 169        [V4L2_FIELD_INTERLACED] = "interlaced",
 170        [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 171        [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 172        [V4L2_FIELD_ALTERNATE]  = "alternate",
 173        [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 174        [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 175};
 176EXPORT_SYMBOL(v4l2_field_names);
 177
 178const char *v4l2_type_names[] = {
 179        [0]                                = "0",
 180        [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 181        [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 182        [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 183        [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 184        [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 185        [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 186        [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 187        [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 188        [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 189        [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 190        [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 191        [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 192        [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 193        [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 194};
 195EXPORT_SYMBOL(v4l2_type_names);
 196
 197static const char *v4l2_memory_names[] = {
 198        [V4L2_MEMORY_MMAP]    = "mmap",
 199        [V4L2_MEMORY_USERPTR] = "userptr",
 200        [V4L2_MEMORY_OVERLAY] = "overlay",
 201        [V4L2_MEMORY_DMABUF] = "dmabuf",
 202};
 203
 204#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 205
 206/* ------------------------------------------------------------------ */
 207/* debug help functions                                               */
 208
 209static void v4l_print_querycap(const void *arg, bool write_only)
 210{
 211        const struct v4l2_capability *p = arg;
 212
 213        pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 214                (int)sizeof(p->driver), p->driver,
 215                (int)sizeof(p->card), p->card,
 216                (int)sizeof(p->bus_info), p->bus_info,
 217                p->version, p->capabilities, p->device_caps);
 218}
 219
 220static void v4l_print_enuminput(const void *arg, bool write_only)
 221{
 222        const struct v4l2_input *p = arg;
 223
 224        pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 225                p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 226                p->tuner, (unsigned long long)p->std, p->status,
 227                p->capabilities);
 228}
 229
 230static void v4l_print_enumoutput(const void *arg, bool write_only)
 231{
 232        const struct v4l2_output *p = arg;
 233
 234        pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 235                p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 236                p->modulator, (unsigned long long)p->std, p->capabilities);
 237}
 238
 239static void v4l_print_audio(const void *arg, bool write_only)
 240{
 241        const struct v4l2_audio *p = arg;
 242
 243        if (write_only)
 244                pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 245        else
 246                pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 247                        p->index, (int)sizeof(p->name), p->name,
 248                        p->capability, p->mode);
 249}
 250
 251static void v4l_print_audioout(const void *arg, bool write_only)
 252{
 253        const struct v4l2_audioout *p = arg;
 254
 255        if (write_only)
 256                pr_cont("index=%u\n", p->index);
 257        else
 258                pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 259                        p->index, (int)sizeof(p->name), p->name,
 260                        p->capability, p->mode);
 261}
 262
 263static void v4l_print_fmtdesc(const void *arg, bool write_only)
 264{
 265        const struct v4l2_fmtdesc *p = arg;
 266
 267        pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 268                p->index, prt_names(p->type, v4l2_type_names),
 269                p->flags, (p->pixelformat & 0xff),
 270                (p->pixelformat >>  8) & 0xff,
 271                (p->pixelformat >> 16) & 0xff,
 272                (p->pixelformat >> 24) & 0xff,
 273                (int)sizeof(p->description), p->description);
 274}
 275
 276static void v4l_print_format(const void *arg, bool write_only)
 277{
 278        const struct v4l2_format *p = arg;
 279        const struct v4l2_pix_format *pix;
 280        const struct v4l2_pix_format_mplane *mp;
 281        const struct v4l2_vbi_format *vbi;
 282        const struct v4l2_sliced_vbi_format *sliced;
 283        const struct v4l2_window *win;
 284        const struct v4l2_sdr_format *sdr;
 285        const struct v4l2_meta_format *meta;
 286        u32 planes;
 287        unsigned i;
 288
 289        pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 290        switch (p->type) {
 291        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 292        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 293                pix = &p->fmt.pix;
 294                pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 295                        pix->width, pix->height,
 296                        (pix->pixelformat & 0xff),
 297                        (pix->pixelformat >>  8) & 0xff,
 298                        (pix->pixelformat >> 16) & 0xff,
 299                        (pix->pixelformat >> 24) & 0xff,
 300                        prt_names(pix->field, v4l2_field_names),
 301                        pix->bytesperline, pix->sizeimage,
 302                        pix->colorspace, pix->flags, pix->ycbcr_enc,
 303                        pix->quantization, pix->xfer_func);
 304                break;
 305        case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 306        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 307                mp = &p->fmt.pix_mp;
 308                pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 309                        mp->width, mp->height,
 310                        (mp->pixelformat & 0xff),
 311                        (mp->pixelformat >>  8) & 0xff,
 312                        (mp->pixelformat >> 16) & 0xff,
 313                        (mp->pixelformat >> 24) & 0xff,
 314                        prt_names(mp->field, v4l2_field_names),
 315                        mp->colorspace, mp->num_planes, mp->flags,
 316                        mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 317                planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 318                for (i = 0; i < planes; i++)
 319                        printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 320                                        mp->plane_fmt[i].bytesperline,
 321                                        mp->plane_fmt[i].sizeimage);
 322                break;
 323        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 324        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 325                win = &p->fmt.win;
 326                /* Note: we can't print the clip list here since the clips
 327                 * pointer is a userspace pointer, not a kernelspace
 328                 * pointer. */
 329                pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n",
 330                        win->w.width, win->w.height, win->w.left, win->w.top,
 331                        prt_names(win->field, v4l2_field_names),
 332                        win->chromakey, win->clipcount, win->clips,
 333                        win->bitmap, win->global_alpha);
 334                break;
 335        case V4L2_BUF_TYPE_VBI_CAPTURE:
 336        case V4L2_BUF_TYPE_VBI_OUTPUT:
 337                vbi = &p->fmt.vbi;
 338                pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 339                        vbi->sampling_rate, vbi->offset,
 340                        vbi->samples_per_line,
 341                        (vbi->sample_format & 0xff),
 342                        (vbi->sample_format >>  8) & 0xff,
 343                        (vbi->sample_format >> 16) & 0xff,
 344                        (vbi->sample_format >> 24) & 0xff,
 345                        vbi->start[0], vbi->start[1],
 346                        vbi->count[0], vbi->count[1]);
 347                break;
 348        case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 349        case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 350                sliced = &p->fmt.sliced;
 351                pr_cont(", service_set=0x%08x, io_size=%d\n",
 352                                sliced->service_set, sliced->io_size);
 353                for (i = 0; i < 24; i++)
 354                        printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 355                                sliced->service_lines[0][i],
 356                                sliced->service_lines[1][i]);
 357                break;
 358        case V4L2_BUF_TYPE_SDR_CAPTURE:
 359        case V4L2_BUF_TYPE_SDR_OUTPUT:
 360                sdr = &p->fmt.sdr;
 361                pr_cont(", pixelformat=%c%c%c%c\n",
 362                        (sdr->pixelformat >>  0) & 0xff,
 363                        (sdr->pixelformat >>  8) & 0xff,
 364                        (sdr->pixelformat >> 16) & 0xff,
 365                        (sdr->pixelformat >> 24) & 0xff);
 366                break;
 367        case V4L2_BUF_TYPE_META_CAPTURE:
 368        case V4L2_BUF_TYPE_META_OUTPUT:
 369                meta = &p->fmt.meta;
 370                pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
 371                        (meta->dataformat >>  0) & 0xff,
 372                        (meta->dataformat >>  8) & 0xff,
 373                        (meta->dataformat >> 16) & 0xff,
 374                        (meta->dataformat >> 24) & 0xff,
 375                        meta->buffersize);
 376                break;
 377        }
 378}
 379
 380static void v4l_print_framebuffer(const void *arg, bool write_only)
 381{
 382        const struct v4l2_framebuffer *p = arg;
 383
 384        pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 385                        p->capability, p->flags, p->base,
 386                        p->fmt.width, p->fmt.height,
 387                        (p->fmt.pixelformat & 0xff),
 388                        (p->fmt.pixelformat >>  8) & 0xff,
 389                        (p->fmt.pixelformat >> 16) & 0xff,
 390                        (p->fmt.pixelformat >> 24) & 0xff,
 391                        p->fmt.bytesperline, p->fmt.sizeimage,
 392                        p->fmt.colorspace);
 393}
 394
 395static void v4l_print_buftype(const void *arg, bool write_only)
 396{
 397        pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 398}
 399
 400static void v4l_print_modulator(const void *arg, bool write_only)
 401{
 402        const struct v4l2_modulator *p = arg;
 403
 404        if (write_only)
 405                pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 406        else
 407                pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 408                        p->index, (int)sizeof(p->name), p->name, p->capability,
 409                        p->rangelow, p->rangehigh, p->txsubchans);
 410}
 411
 412static void v4l_print_tuner(const void *arg, bool write_only)
 413{
 414        const struct v4l2_tuner *p = arg;
 415
 416        if (write_only)
 417                pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 418        else
 419                pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n",
 420                        p->index, (int)sizeof(p->name), p->name, p->type,
 421                        p->capability, p->rangelow,
 422                        p->rangehigh, p->signal, p->afc,
 423                        p->rxsubchans, p->audmode);
 424}
 425
 426static void v4l_print_frequency(const void *arg, bool write_only)
 427{
 428        const struct v4l2_frequency *p = arg;
 429
 430        pr_cont("tuner=%u, type=%u, frequency=%u\n",
 431                                p->tuner, p->type, p->frequency);
 432}
 433
 434static void v4l_print_standard(const void *arg, bool write_only)
 435{
 436        const struct v4l2_standard *p = arg;
 437
 438        pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 439                p->index,
 440                (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 441                p->frameperiod.numerator,
 442                p->frameperiod.denominator,
 443                p->framelines);
 444}
 445
 446static void v4l_print_std(const void *arg, bool write_only)
 447{
 448        pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 449}
 450
 451static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 452{
 453        const struct v4l2_hw_freq_seek *p = arg;
 454
 455        pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 456                p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 457                p->rangelow, p->rangehigh);
 458}
 459
 460static void v4l_print_requestbuffers(const void *arg, bool write_only)
 461{
 462        const struct v4l2_requestbuffers *p = arg;
 463
 464        pr_cont("count=%d, type=%s, memory=%s\n",
 465                p->count,
 466                prt_names(p->type, v4l2_type_names),
 467                prt_names(p->memory, v4l2_memory_names));
 468}
 469
 470static void v4l_print_buffer(const void *arg, bool write_only)
 471{
 472        const struct v4l2_buffer *p = arg;
 473        const struct v4l2_timecode *tc = &p->timecode;
 474        const struct v4l2_plane *plane;
 475        int i;
 476
 477        pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 478                        p->timestamp.tv_sec / 3600,
 479                        (int)(p->timestamp.tv_sec / 60) % 60,
 480                        (int)(p->timestamp.tv_sec % 60),
 481                        (long)p->timestamp.tv_usec,
 482                        p->index,
 483                        prt_names(p->type, v4l2_type_names), p->request_fd,
 484                        p->flags, prt_names(p->field, v4l2_field_names),
 485                        p->sequence, prt_names(p->memory, v4l2_memory_names));
 486
 487        if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 488                pr_cont("\n");
 489                for (i = 0; i < p->length; ++i) {
 490                        plane = &p->m.planes[i];
 491                        printk(KERN_DEBUG
 492                                "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 493                                i, plane->bytesused, plane->data_offset,
 494                                plane->m.userptr, plane->length);
 495                }
 496        } else {
 497                pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 498                        p->bytesused, p->m.userptr, p->length);
 499        }
 500
 501        printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 502                        tc->hours, tc->minutes, tc->seconds,
 503                        tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 504}
 505
 506static void v4l_print_exportbuffer(const void *arg, bool write_only)
 507{
 508        const struct v4l2_exportbuffer *p = arg;
 509
 510        pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 511                p->fd, prt_names(p->type, v4l2_type_names),
 512                p->index, p->plane, p->flags);
 513}
 514
 515static void v4l_print_create_buffers(const void *arg, bool write_only)
 516{
 517        const struct v4l2_create_buffers *p = arg;
 518
 519        pr_cont("index=%d, count=%d, memory=%s, ",
 520                        p->index, p->count,
 521                        prt_names(p->memory, v4l2_memory_names));
 522        v4l_print_format(&p->format, write_only);
 523}
 524
 525static void v4l_print_streamparm(const void *arg, bool write_only)
 526{
 527        const struct v4l2_streamparm *p = arg;
 528
 529        pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 530
 531        if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 532            p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 533                const struct v4l2_captureparm *c = &p->parm.capture;
 534
 535                pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 536                        c->capability, c->capturemode,
 537                        c->timeperframe.numerator, c->timeperframe.denominator,
 538                        c->extendedmode, c->readbuffers);
 539        } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 540                   p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 541                const struct v4l2_outputparm *c = &p->parm.output;
 542
 543                pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 544                        c->capability, c->outputmode,
 545                        c->timeperframe.numerator, c->timeperframe.denominator,
 546                        c->extendedmode, c->writebuffers);
 547        } else {
 548                pr_cont("\n");
 549        }
 550}
 551
 552static void v4l_print_queryctrl(const void *arg, bool write_only)
 553{
 554        const struct v4l2_queryctrl *p = arg;
 555
 556        pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 557                        p->id, p->type, (int)sizeof(p->name), p->name,
 558                        p->minimum, p->maximum,
 559                        p->step, p->default_value, p->flags);
 560}
 561
 562static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 563{
 564        const struct v4l2_query_ext_ctrl *p = arg;
 565
 566        pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 567                        p->id, p->type, (int)sizeof(p->name), p->name,
 568                        p->minimum, p->maximum,
 569                        p->step, p->default_value, p->flags,
 570                        p->elem_size, p->elems, p->nr_of_dims,
 571                        p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 572}
 573
 574static void v4l_print_querymenu(const void *arg, bool write_only)
 575{
 576        const struct v4l2_querymenu *p = arg;
 577
 578        pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 579}
 580
 581static void v4l_print_control(const void *arg, bool write_only)
 582{
 583        const struct v4l2_control *p = arg;
 584
 585        pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 586}
 587
 588static void v4l_print_ext_controls(const void *arg, bool write_only)
 589{
 590        const struct v4l2_ext_controls *p = arg;
 591        int i;
 592
 593        pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 594                        p->which, p->count, p->error_idx, p->request_fd);
 595        for (i = 0; i < p->count; i++) {
 596                if (!p->controls[i].size)
 597                        pr_cont(", id/val=0x%x/0x%x",
 598                                p->controls[i].id, p->controls[i].value);
 599                else
 600                        pr_cont(", id/size=0x%x/%u",
 601                                p->controls[i].id, p->controls[i].size);
 602        }
 603        pr_cont("\n");
 604}
 605
 606static void v4l_print_cropcap(const void *arg, bool write_only)
 607{
 608        const struct v4l2_cropcap *p = arg;
 609
 610        pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 611                prt_names(p->type, v4l2_type_names),
 612                p->bounds.width, p->bounds.height,
 613                p->bounds.left, p->bounds.top,
 614                p->defrect.width, p->defrect.height,
 615                p->defrect.left, p->defrect.top,
 616                p->pixelaspect.numerator, p->pixelaspect.denominator);
 617}
 618
 619static void v4l_print_crop(const void *arg, bool write_only)
 620{
 621        const struct v4l2_crop *p = arg;
 622
 623        pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 624                prt_names(p->type, v4l2_type_names),
 625                p->c.width, p->c.height,
 626                p->c.left, p->c.top);
 627}
 628
 629static void v4l_print_selection(const void *arg, bool write_only)
 630{
 631        const struct v4l2_selection *p = arg;
 632
 633        pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 634                prt_names(p->type, v4l2_type_names),
 635                p->target, p->flags,
 636                p->r.width, p->r.height, p->r.left, p->r.top);
 637}
 638
 639static void v4l_print_jpegcompression(const void *arg, bool write_only)
 640{
 641        const struct v4l2_jpegcompression *p = arg;
 642
 643        pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 644                p->quality, p->APPn, p->APP_len,
 645                p->COM_len, p->jpeg_markers);
 646}
 647
 648static void v4l_print_enc_idx(const void *arg, bool write_only)
 649{
 650        const struct v4l2_enc_idx *p = arg;
 651
 652        pr_cont("entries=%d, entries_cap=%d\n",
 653                        p->entries, p->entries_cap);
 654}
 655
 656static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 657{
 658        const struct v4l2_encoder_cmd *p = arg;
 659
 660        pr_cont("cmd=%d, flags=0x%x\n",
 661                        p->cmd, p->flags);
 662}
 663
 664static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 665{
 666        const struct v4l2_decoder_cmd *p = arg;
 667
 668        pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 669
 670        if (p->cmd == V4L2_DEC_CMD_START)
 671                pr_info("speed=%d, format=%u\n",
 672                                p->start.speed, p->start.format);
 673        else if (p->cmd == V4L2_DEC_CMD_STOP)
 674                pr_info("pts=%llu\n", p->stop.pts);
 675}
 676
 677static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 678{
 679        const struct v4l2_dbg_chip_info *p = arg;
 680
 681        pr_cont("type=%u, ", p->match.type);
 682        if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 683                pr_cont("name=%.*s, ",
 684                                (int)sizeof(p->match.name), p->match.name);
 685        else
 686                pr_cont("addr=%u, ", p->match.addr);
 687        pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 688}
 689
 690static void v4l_print_dbg_register(const void *arg, bool write_only)
 691{
 692        const struct v4l2_dbg_register *p = arg;
 693
 694        pr_cont("type=%u, ", p->match.type);
 695        if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 696                pr_cont("name=%.*s, ",
 697                                (int)sizeof(p->match.name), p->match.name);
 698        else
 699                pr_cont("addr=%u, ", p->match.addr);
 700        pr_cont("reg=0x%llx, val=0x%llx\n",
 701                        p->reg, p->val);
 702}
 703
 704static void v4l_print_dv_timings(const void *arg, bool write_only)
 705{
 706        const struct v4l2_dv_timings *p = arg;
 707
 708        switch (p->type) {
 709        case V4L2_DV_BT_656_1120:
 710                pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 711                                p->bt.interlaced, p->bt.pixelclock,
 712                                p->bt.width, p->bt.height,
 713                                p->bt.polarities, p->bt.hfrontporch,
 714                                p->bt.hsync, p->bt.hbackporch,
 715                                p->bt.vfrontporch, p->bt.vsync,
 716                                p->bt.vbackporch, p->bt.il_vfrontporch,
 717                                p->bt.il_vsync, p->bt.il_vbackporch,
 718                                p->bt.standards, p->bt.flags);
 719                break;
 720        default:
 721                pr_cont("type=%d\n", p->type);
 722                break;
 723        }
 724}
 725
 726static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 727{
 728        const struct v4l2_enum_dv_timings *p = arg;
 729
 730        pr_cont("index=%u, ", p->index);
 731        v4l_print_dv_timings(&p->timings, write_only);
 732}
 733
 734static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 735{
 736        const struct v4l2_dv_timings_cap *p = arg;
 737
 738        switch (p->type) {
 739        case V4L2_DV_BT_656_1120:
 740                pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 741                        p->bt.min_width, p->bt.max_width,
 742                        p->bt.min_height, p->bt.max_height,
 743                        p->bt.min_pixelclock, p->bt.max_pixelclock,
 744                        p->bt.standards, p->bt.capabilities);
 745                break;
 746        default:
 747                pr_cont("type=%u\n", p->type);
 748                break;
 749        }
 750}
 751
 752static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 753{
 754        const struct v4l2_frmsizeenum *p = arg;
 755
 756        pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 757                        p->index,
 758                        (p->pixel_format & 0xff),
 759                        (p->pixel_format >>  8) & 0xff,
 760                        (p->pixel_format >> 16) & 0xff,
 761                        (p->pixel_format >> 24) & 0xff,
 762                        p->type);
 763        switch (p->type) {
 764        case V4L2_FRMSIZE_TYPE_DISCRETE:
 765                pr_cont(", wxh=%ux%u\n",
 766                        p->discrete.width, p->discrete.height);
 767                break;
 768        case V4L2_FRMSIZE_TYPE_STEPWISE:
 769                pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 770                                p->stepwise.min_width,
 771                                p->stepwise.min_height,
 772                                p->stepwise.max_width,
 773                                p->stepwise.max_height,
 774                                p->stepwise.step_width,
 775                                p->stepwise.step_height);
 776                break;
 777        case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 778                /* fall through */
 779        default:
 780                pr_cont("\n");
 781                break;
 782        }
 783}
 784
 785static void v4l_print_frmivalenum(const void *arg, bool write_only)
 786{
 787        const struct v4l2_frmivalenum *p = arg;
 788
 789        pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 790                        p->index,
 791                        (p->pixel_format & 0xff),
 792                        (p->pixel_format >>  8) & 0xff,
 793                        (p->pixel_format >> 16) & 0xff,
 794                        (p->pixel_format >> 24) & 0xff,
 795                        p->width, p->height, p->type);
 796        switch (p->type) {
 797        case V4L2_FRMIVAL_TYPE_DISCRETE:
 798                pr_cont(", fps=%d/%d\n",
 799                                p->discrete.numerator,
 800                                p->discrete.denominator);
 801                break;
 802        case V4L2_FRMIVAL_TYPE_STEPWISE:
 803                pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 804                                p->stepwise.min.numerator,
 805                                p->stepwise.min.denominator,
 806                                p->stepwise.max.numerator,
 807                                p->stepwise.max.denominator,
 808                                p->stepwise.step.numerator,
 809                                p->stepwise.step.denominator);
 810                break;
 811        case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 812                /* fall through */
 813        default:
 814                pr_cont("\n");
 815                break;
 816        }
 817}
 818
 819static void v4l_print_event(const void *arg, bool write_only)
 820{
 821        const struct v4l2_event *p = arg;
 822        const struct v4l2_event_ctrl *c;
 823
 824        pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
 825                        p->type, p->pending, p->sequence, p->id,
 826                        p->timestamp.tv_sec, p->timestamp.tv_nsec);
 827        switch (p->type) {
 828        case V4L2_EVENT_VSYNC:
 829                printk(KERN_DEBUG "field=%s\n",
 830                        prt_names(p->u.vsync.field, v4l2_field_names));
 831                break;
 832        case V4L2_EVENT_CTRL:
 833                c = &p->u.ctrl;
 834                printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 835                        c->changes, c->type);
 836                if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 837                        pr_cont("value64=%lld, ", c->value64);
 838                else
 839                        pr_cont("value=%d, ", c->value);
 840                pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 841                        c->flags, c->minimum, c->maximum,
 842                        c->step, c->default_value);
 843                break;
 844        case V4L2_EVENT_FRAME_SYNC:
 845                pr_cont("frame_sequence=%u\n",
 846                        p->u.frame_sync.frame_sequence);
 847                break;
 848        }
 849}
 850
 851static void v4l_print_event_subscription(const void *arg, bool write_only)
 852{
 853        const struct v4l2_event_subscription *p = arg;
 854
 855        pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 856                        p->type, p->id, p->flags);
 857}
 858
 859static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 860{
 861        const struct v4l2_sliced_vbi_cap *p = arg;
 862        int i;
 863
 864        pr_cont("type=%s, service_set=0x%08x\n",
 865                        prt_names(p->type, v4l2_type_names), p->service_set);
 866        for (i = 0; i < 24; i++)
 867                printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 868                                p->service_lines[0][i],
 869                                p->service_lines[1][i]);
 870}
 871
 872static void v4l_print_freq_band(const void *arg, bool write_only)
 873{
 874        const struct v4l2_frequency_band *p = arg;
 875
 876        pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 877                        p->tuner, p->type, p->index,
 878                        p->capability, p->rangelow,
 879                        p->rangehigh, p->modulation);
 880}
 881
 882static void v4l_print_edid(const void *arg, bool write_only)
 883{
 884        const struct v4l2_edid *p = arg;
 885
 886        pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 887                p->pad, p->start_block, p->blocks);
 888}
 889
 890static void v4l_print_u32(const void *arg, bool write_only)
 891{
 892        pr_cont("value=%u\n", *(const u32 *)arg);
 893}
 894
 895static void v4l_print_newline(const void *arg, bool write_only)
 896{
 897        pr_cont("\n");
 898}
 899
 900static void v4l_print_default(const void *arg, bool write_only)
 901{
 902        pr_cont("driver-specific ioctl\n");
 903}
 904
 905static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 906{
 907        __u32 i;
 908
 909        /* zero the reserved fields */
 910        c->reserved[0] = 0;
 911        for (i = 0; i < c->count; i++)
 912                c->controls[i].reserved2[0] = 0;
 913
 914        /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 915           when using extended controls.
 916           Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 917           is it allowed for backwards compatibility.
 918         */
 919        if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 920                return 0;
 921        if (!c->which)
 922                return 1;
 923        /* Check that all controls are from the same control class. */
 924        for (i = 0; i < c->count; i++) {
 925                if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 926                        c->error_idx = i;
 927                        return 0;
 928                }
 929        }
 930        return 1;
 931}
 932
 933static int check_fmt(struct file *file, enum v4l2_buf_type type)
 934{
 935        struct video_device *vfd = video_devdata(file);
 936        const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 937        bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 938        bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 939        bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 940        bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 941        bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 942        bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 943
 944        if (ops == NULL)
 945                return -EINVAL;
 946
 947        switch (type) {
 948        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 949                if ((is_vid || is_tch) && is_rx &&
 950                    (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 951                        return 0;
 952                break;
 953        case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 954                if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 955                        return 0;
 956                break;
 957        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 958                if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 959                        return 0;
 960                break;
 961        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 962                if (is_vid && is_tx &&
 963                    (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 964                        return 0;
 965                break;
 966        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 967                if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 968                        return 0;
 969                break;
 970        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 971                if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 972                        return 0;
 973                break;
 974        case V4L2_BUF_TYPE_VBI_CAPTURE:
 975                if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 976                        return 0;
 977                break;
 978        case V4L2_BUF_TYPE_VBI_OUTPUT:
 979                if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 980                        return 0;
 981                break;
 982        case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 983                if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 984                        return 0;
 985                break;
 986        case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 987                if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 988                        return 0;
 989                break;
 990        case V4L2_BUF_TYPE_SDR_CAPTURE:
 991                if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 992                        return 0;
 993                break;
 994        case V4L2_BUF_TYPE_SDR_OUTPUT:
 995                if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 996                        return 0;
 997                break;
 998        case V4L2_BUF_TYPE_META_CAPTURE:
 999                if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap)
1000                        return 0;
1001                break;
1002        case V4L2_BUF_TYPE_META_OUTPUT:
1003                if (is_vid && is_tx && ops->vidioc_g_fmt_meta_out)
1004                        return 0;
1005                break;
1006        default:
1007                break;
1008        }
1009        return -EINVAL;
1010}
1011
1012static void v4l_sanitize_format(struct v4l2_format *fmt)
1013{
1014        unsigned int offset;
1015
1016        /* Make sure num_planes is not bogus */
1017        if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1018            fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1019                fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1020                                               VIDEO_MAX_PLANES);
1021
1022        /*
1023         * The v4l2_pix_format structure has been extended with fields that were
1024         * not previously required to be set to zero by applications. The priv
1025         * field, when set to a magic value, indicates the the extended fields
1026         * are valid. Otherwise they will contain undefined values. To simplify
1027         * the API towards drivers zero the extended fields and set the priv
1028         * field to the magic value when the extended pixel format structure
1029         * isn't used by applications.
1030         */
1031
1032        if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1033            fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1034                return;
1035
1036        if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1037                return;
1038
1039        fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1040
1041        offset = offsetof(struct v4l2_pix_format, priv)
1042               + sizeof(fmt->fmt.pix.priv);
1043        memset(((void *)&fmt->fmt.pix) + offset, 0,
1044               sizeof(fmt->fmt.pix) - offset);
1045}
1046
1047static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1048                                struct file *file, void *fh, void *arg)
1049{
1050        struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1051        struct video_device *vfd = video_devdata(file);
1052        int ret;
1053
1054        cap->version = LINUX_VERSION_CODE;
1055        cap->device_caps = vfd->device_caps;
1056        cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1057
1058        ret = ops->vidioc_querycap(file, fh, cap);
1059
1060        /*
1061         * Drivers must not change device_caps, so check for this and
1062         * warn if this happened.
1063         */
1064        WARN_ON(cap->device_caps != vfd->device_caps);
1065        /*
1066         * Check that capabilities is a superset of
1067         * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1068         */
1069        WARN_ON((cap->capabilities &
1070                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1071                (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1072        cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1073        cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1074
1075        return ret;
1076}
1077
1078static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1079                                struct file *file, void *fh, void *arg)
1080{
1081        struct video_device *vfd = video_devdata(file);
1082        int ret;
1083
1084        ret = v4l_enable_media_source(vfd);
1085        if (ret)
1086                return ret;
1087        return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1088}
1089
1090static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1091                                struct file *file, void *fh, void *arg)
1092{
1093        return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1094}
1095
1096static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1097                                struct file *file, void *fh, void *arg)
1098{
1099        struct video_device *vfd;
1100        u32 *p = arg;
1101
1102        vfd = video_devdata(file);
1103        *p = v4l2_prio_max(vfd->prio);
1104        return 0;
1105}
1106
1107static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1108                                struct file *file, void *fh, void *arg)
1109{
1110        struct video_device *vfd;
1111        struct v4l2_fh *vfh;
1112        u32 *p = arg;
1113
1114        vfd = video_devdata(file);
1115        if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1116                return -ENOTTY;
1117        vfh = file->private_data;
1118        return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1119}
1120
1121static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1122                                struct file *file, void *fh, void *arg)
1123{
1124        struct video_device *vfd = video_devdata(file);
1125        struct v4l2_input *p = arg;
1126
1127        /*
1128         * We set the flags for CAP_DV_TIMINGS &
1129         * CAP_STD here based on ioctl handler provided by the
1130         * driver. If the driver doesn't support these
1131         * for a specific input, it must override these flags.
1132         */
1133        if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1134                p->capabilities |= V4L2_IN_CAP_STD;
1135
1136        return ops->vidioc_enum_input(file, fh, p);
1137}
1138
1139static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1140                                struct file *file, void *fh, void *arg)
1141{
1142        struct video_device *vfd = video_devdata(file);
1143        struct v4l2_output *p = arg;
1144
1145        /*
1146         * We set the flags for CAP_DV_TIMINGS &
1147         * CAP_STD here based on ioctl handler provided by the
1148         * driver. If the driver doesn't support these
1149         * for a specific output, it must override these flags.
1150         */
1151        if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1152                p->capabilities |= V4L2_OUT_CAP_STD;
1153
1154        return ops->vidioc_enum_output(file, fh, p);
1155}
1156
1157static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1158{
1159        const unsigned sz = sizeof(fmt->description);
1160        const char *descr = NULL;
1161        u32 flags = 0;
1162
1163        /*
1164         * We depart from the normal coding style here since the descriptions
1165         * should be aligned so it is easy to see which descriptions will be
1166         * longer than 31 characters (the max length for a description).
1167         * And frankly, this is easier to read anyway.
1168         *
1169         * Note that gcc will use O(log N) comparisons to find the right case.
1170         */
1171        switch (fmt->pixelformat) {
1172        /* Max description length mask: descr = "0123456789012345678901234567890" */
1173        case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1174        case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1175        case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1176        case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1177        case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1178        case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1179        case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1180        case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1181        case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1182        case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1183        case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1184        case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1185        case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1186        case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1187        case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1188        case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1189        case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1190        case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1191        case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1192        case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1193        case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1194        case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1195        case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1196        case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1197        case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1198        case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1199        case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1200        case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1201        case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1202        case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1203        case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1204        case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1205        case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1206        case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1207        case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1208        case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1209        case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1210        case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1211        case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1212        case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1213        case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1214        case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1215        case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1216        case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1217        case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1218        case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1219        case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1220        case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1221        case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1222        case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1223        case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1224        case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1225        case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1226        case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1227        case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1228        case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1229        case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1230        case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1231        case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1232        case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1233        case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1234        case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1235        case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1236        case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1237        case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1238        case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1239        case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1240        case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1241        case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1242        case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1243        case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1244        case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1245        case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1246        case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1247        case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1248        case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1249        case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1250        case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1251        case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1252        case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1253        case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1254        case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1255        case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1256        case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1257        case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1258        case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1259        case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1260        case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1261        case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1262        case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1263        case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1264        case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1265        case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1266        case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1267        case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1268        case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1269        case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1270        case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1271        case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1272        case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1273        case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1274        case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1275        case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1276        case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1277        case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1278        case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1279        case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1280        case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1281        case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1282        case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1283        case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1284        case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1285        case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1286        case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1287        case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1288        case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1289        case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1290        case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1291        case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1292        case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1293        case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1294        case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1295        case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1296        case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1297        case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1298        case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1299        case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1300        case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1301        case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1302        case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1303        case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1304        case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1305        case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1306        case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1307        case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1308        case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1309        case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1310        case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1311        case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1312        case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1313        case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1314        case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1315        case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1316        case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1317        case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1318        case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1319        case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1320        case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1321        case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1322        case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1323        case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1324        case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1325        case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1326        case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1327        case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1328        case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1329        case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1330        case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1331        case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1332        case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1333
1334        default:
1335                /* Compressed formats */
1336                flags = V4L2_FMT_FLAG_COMPRESSED;
1337                switch (fmt->pixelformat) {
1338                /* Max description length mask: descr = "0123456789012345678901234567890" */
1339                case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1340                case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1341                case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1342                case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1343                case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1344                case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1345                case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1346                case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1347                case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1348                case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1349                case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1350                case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1351                case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1352                case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1353                case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1354                case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1355                case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1356                case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1357                case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1358                case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1359                case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1360                case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1361                case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1362                case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1363                case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1364                case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1365                case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1366                case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1367                case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1368                case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1369                case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1370                case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1371                case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1372                case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1373                case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1374                case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1375                case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1376                case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1377                case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1378                case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1379                case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1380                case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1381                default:
1382                        if (fmt->description[0])
1383                                return;
1384                        WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1385                        flags = 0;
1386                        snprintf(fmt->description, sz, "%c%c%c%c%s",
1387                                        (char)(fmt->pixelformat & 0x7f),
1388                                        (char)((fmt->pixelformat >> 8) & 0x7f),
1389                                        (char)((fmt->pixelformat >> 16) & 0x7f),
1390                                        (char)((fmt->pixelformat >> 24) & 0x7f),
1391                                        (fmt->pixelformat & (1UL << 31)) ? "-BE" : "");
1392                        break;
1393                }
1394        }
1395
1396        if (descr)
1397                WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1398        fmt->flags |= flags;
1399}
1400
1401static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1402                                struct file *file, void *fh, void *arg)
1403{
1404        struct video_device *vdev = video_devdata(file);
1405        struct v4l2_fmtdesc *p = arg;
1406        int ret = check_fmt(file, p->type);
1407        u32 cap_mask;
1408
1409        if (ret)
1410                return ret;
1411        ret = -EINVAL;
1412
1413        switch (p->type) {
1414        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1415        case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1416                cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1417                           V4L2_CAP_VIDEO_M2M_MPLANE;
1418                if (!!(vdev->device_caps & cap_mask) !=
1419                    (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1420                        break;
1421
1422                if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1423                        break;
1424                ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1425                break;
1426        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1427                if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1428                        break;
1429                ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1430                break;
1431        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1432        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1433                cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1434                           V4L2_CAP_VIDEO_M2M_MPLANE;
1435                if (!!(vdev->device_caps & cap_mask) !=
1436                    (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1437                        break;
1438
1439                if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1440                        break;
1441                ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1442                break;
1443        case V4L2_BUF_TYPE_SDR_CAPTURE:
1444                if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1445                        break;
1446                ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1447                break;
1448        case V4L2_BUF_TYPE_SDR_OUTPUT:
1449                if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1450                        break;
1451                ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1452                break;
1453        case V4L2_BUF_TYPE_META_CAPTURE:
1454                if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1455                        break;
1456                ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1457                break;
1458        case V4L2_BUF_TYPE_META_OUTPUT:
1459                if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1460                        break;
1461                ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1462                break;
1463        }
1464        if (ret == 0)
1465                v4l_fill_fmtdesc(p);
1466        return ret;
1467}
1468
1469static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1470                                struct file *file, void *fh, void *arg)
1471{
1472        struct v4l2_format *p = arg;
1473        int ret = check_fmt(file, p->type);
1474
1475        if (ret)
1476                return ret;
1477
1478        /*
1479         * fmt can't be cleared for these overlay types due to the 'clips'
1480         * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1481         * Those are provided by the user. So handle these two overlay types
1482         * first, and then just do a simple memset for the other types.
1483         */
1484        switch (p->type) {
1485        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1486        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1487                struct v4l2_clip __user *clips = p->fmt.win.clips;
1488                u32 clipcount = p->fmt.win.clipcount;
1489                void __user *bitmap = p->fmt.win.bitmap;
1490
1491                memset(&p->fmt, 0, sizeof(p->fmt));
1492                p->fmt.win.clips = clips;
1493                p->fmt.win.clipcount = clipcount;
1494                p->fmt.win.bitmap = bitmap;
1495                break;
1496        }
1497        default:
1498                memset(&p->fmt, 0, sizeof(p->fmt));
1499                break;
1500        }
1501
1502        switch (p->type) {
1503        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1504                if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1505                        break;
1506                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1507                ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1508                /* just in case the driver zeroed it again */
1509                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1510                return ret;
1511        case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1512                return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1513        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1514                return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1515        case V4L2_BUF_TYPE_VBI_CAPTURE:
1516                return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1517        case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1518                return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1519        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1520                if (unlikely(!ops->vidioc_g_fmt_vid_out))
1521                        break;
1522                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1523                ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1524                /* just in case the driver zeroed it again */
1525                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1526                return ret;
1527        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1528                return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1529        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1530                return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1531        case V4L2_BUF_TYPE_VBI_OUTPUT:
1532                return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1533        case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1534                return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1535        case V4L2_BUF_TYPE_SDR_CAPTURE:
1536                return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1537        case V4L2_BUF_TYPE_SDR_OUTPUT:
1538                return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1539        case V4L2_BUF_TYPE_META_CAPTURE:
1540                return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1541        case V4L2_BUF_TYPE_META_OUTPUT:
1542                return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1543        }
1544        return -EINVAL;
1545}
1546
1547static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1548{
1549        /*
1550         * The v4l2_pix_format structure contains fields that make no sense for
1551         * touch. Set them to default values in this case.
1552         */
1553
1554        p->field = V4L2_FIELD_NONE;
1555        p->colorspace = V4L2_COLORSPACE_RAW;
1556        p->flags = 0;
1557        p->ycbcr_enc = 0;
1558        p->quantization = 0;
1559        p->xfer_func = 0;
1560}
1561
1562static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1563                                struct file *file, void *fh, void *arg)
1564{
1565        struct v4l2_format *p = arg;
1566        struct video_device *vfd = video_devdata(file);
1567        int ret = check_fmt(file, p->type);
1568        unsigned int i;
1569
1570        if (ret)
1571                return ret;
1572
1573        ret = v4l_enable_media_source(vfd);
1574        if (ret)
1575                return ret;
1576        v4l_sanitize_format(p);
1577
1578        switch (p->type) {
1579        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1580                if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1581                        break;
1582                CLEAR_AFTER_FIELD(p, fmt.pix);
1583                ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1584                /* just in case the driver zeroed it again */
1585                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1586                if (vfd->vfl_type == VFL_TYPE_TOUCH)
1587                        v4l_pix_format_touch(&p->fmt.pix);
1588                return ret;
1589        case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1590                if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1591                        break;
1592                CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1593                for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1594                        CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1595                                          bytesperline);
1596                return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1597        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1598                if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1599                        break;
1600                CLEAR_AFTER_FIELD(p, fmt.win);
1601                return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1602        case V4L2_BUF_TYPE_VBI_CAPTURE:
1603                if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1604                        break;
1605                CLEAR_AFTER_FIELD(p, fmt.vbi);
1606                return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1607        case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1608                if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1609                        break;
1610                CLEAR_AFTER_FIELD(p, fmt.sliced);
1611                return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1612        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1613                if (unlikely(!ops->vidioc_s_fmt_vid_out))
1614                        break;
1615                CLEAR_AFTER_FIELD(p, fmt.pix);
1616                ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1617                /* just in case the driver zeroed it again */
1618                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1619                return ret;
1620        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1621                if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1622                        break;
1623                CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1624                for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1625                        CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1626                                          bytesperline);
1627                return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1628        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1629                if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1630                        break;
1631                CLEAR_AFTER_FIELD(p, fmt.win);
1632                return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1633        case V4L2_BUF_TYPE_VBI_OUTPUT:
1634                if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1635                        break;
1636                CLEAR_AFTER_FIELD(p, fmt.vbi);
1637                return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1638        case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1639                if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1640                        break;
1641                CLEAR_AFTER_FIELD(p, fmt.sliced);
1642                return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1643        case V4L2_BUF_TYPE_SDR_CAPTURE:
1644                if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1645                        break;
1646                CLEAR_AFTER_FIELD(p, fmt.sdr);
1647                return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1648        case V4L2_BUF_TYPE_SDR_OUTPUT:
1649                if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1650                        break;
1651                CLEAR_AFTER_FIELD(p, fmt.sdr);
1652                return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1653        case V4L2_BUF_TYPE_META_CAPTURE:
1654                if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1655                        break;
1656                CLEAR_AFTER_FIELD(p, fmt.meta);
1657                return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1658        case V4L2_BUF_TYPE_META_OUTPUT:
1659                if (unlikely(!ops->vidioc_s_fmt_meta_out))
1660                        break;
1661                CLEAR_AFTER_FIELD(p, fmt.meta);
1662                return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1663        }
1664        return -EINVAL;
1665}
1666
1667static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1668                                struct file *file, void *fh, void *arg)
1669{
1670        struct v4l2_format *p = arg;
1671        struct video_device *vfd = video_devdata(file);
1672        int ret = check_fmt(file, p->type);
1673        unsigned int i;
1674
1675        if (ret)
1676                return ret;
1677
1678        v4l_sanitize_format(p);
1679
1680        switch (p->type) {
1681        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1682                if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1683                        break;
1684                CLEAR_AFTER_FIELD(p, fmt.pix);
1685                ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1686                /* just in case the driver zeroed it again */
1687                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1688                if (vfd->vfl_type == VFL_TYPE_TOUCH)
1689                        v4l_pix_format_touch(&p->fmt.pix);
1690                return ret;
1691        case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1692                if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1693                        break;
1694                CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1695                for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1696                        CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1697                                          bytesperline);
1698                return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1699        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1700                if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1701                        break;
1702                CLEAR_AFTER_FIELD(p, fmt.win);
1703                return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1704        case V4L2_BUF_TYPE_VBI_CAPTURE:
1705                if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1706                        break;
1707                CLEAR_AFTER_FIELD(p, fmt.vbi);
1708                return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1709        case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1710                if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1711                        break;
1712                CLEAR_AFTER_FIELD(p, fmt.sliced);
1713                return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1714        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1715                if (unlikely(!ops->vidioc_try_fmt_vid_out))
1716                        break;
1717                CLEAR_AFTER_FIELD(p, fmt.pix);
1718                ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1719                /* just in case the driver zeroed it again */
1720                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1721                return ret;
1722        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1723                if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1724                        break;
1725                CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1726                for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1727                        CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1728                                          bytesperline);
1729                return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1730        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1731                if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1732                        break;
1733                CLEAR_AFTER_FIELD(p, fmt.win);
1734                return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1735        case V4L2_BUF_TYPE_VBI_OUTPUT:
1736                if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1737                        break;
1738                CLEAR_AFTER_FIELD(p, fmt.vbi);
1739                return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1740        case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1741                if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1742                        break;
1743                CLEAR_AFTER_FIELD(p, fmt.sliced);
1744                return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1745        case V4L2_BUF_TYPE_SDR_CAPTURE:
1746                if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1747                        break;
1748                CLEAR_AFTER_FIELD(p, fmt.sdr);
1749                return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1750        case V4L2_BUF_TYPE_SDR_OUTPUT:
1751                if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1752                        break;
1753                CLEAR_AFTER_FIELD(p, fmt.sdr);
1754                return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1755        case V4L2_BUF_TYPE_META_CAPTURE:
1756                if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1757                        break;
1758                CLEAR_AFTER_FIELD(p, fmt.meta);
1759                return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1760        case V4L2_BUF_TYPE_META_OUTPUT:
1761                if (unlikely(!ops->vidioc_try_fmt_meta_out))
1762                        break;
1763                CLEAR_AFTER_FIELD(p, fmt.meta);
1764                return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1765        }
1766        return -EINVAL;
1767}
1768
1769static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1770                                struct file *file, void *fh, void *arg)
1771{
1772        return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1773}
1774
1775static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1776                                struct file *file, void *fh, void *arg)
1777{
1778        return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1779}
1780
1781static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1782                                struct file *file, void *fh, void *arg)
1783{
1784        struct video_device *vfd = video_devdata(file);
1785        struct v4l2_tuner *p = arg;
1786        int err;
1787
1788        p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1789                        V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1790        err = ops->vidioc_g_tuner(file, fh, p);
1791        if (!err)
1792                p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1793        return err;
1794}
1795
1796static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1797                                struct file *file, void *fh, void *arg)
1798{
1799        struct video_device *vfd = video_devdata(file);
1800        struct v4l2_tuner *p = arg;
1801        int ret;
1802
1803        ret = v4l_enable_media_source(vfd);
1804        if (ret)
1805                return ret;
1806        p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1807                        V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1808        return ops->vidioc_s_tuner(file, fh, p);
1809}
1810
1811static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1812                                struct file *file, void *fh, void *arg)
1813{
1814        struct video_device *vfd = video_devdata(file);
1815        struct v4l2_modulator *p = arg;
1816        int err;
1817
1818        if (vfd->vfl_type == VFL_TYPE_RADIO)
1819                p->type = V4L2_TUNER_RADIO;
1820
1821        err = ops->vidioc_g_modulator(file, fh, p);
1822        if (!err)
1823                p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1824        return err;
1825}
1826
1827static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1828                                struct file *file, void *fh, void *arg)
1829{
1830        struct video_device *vfd = video_devdata(file);
1831        struct v4l2_modulator *p = arg;
1832
1833        if (vfd->vfl_type == VFL_TYPE_RADIO)
1834                p->type = V4L2_TUNER_RADIO;
1835
1836        return ops->vidioc_s_modulator(file, fh, p);
1837}
1838
1839static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1840                                struct file *file, void *fh, void *arg)
1841{
1842        struct video_device *vfd = video_devdata(file);
1843        struct v4l2_frequency *p = arg;
1844
1845        if (vfd->vfl_type == VFL_TYPE_SDR)
1846                p->type = V4L2_TUNER_SDR;
1847        else
1848                p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1849                                V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1850        return ops->vidioc_g_frequency(file, fh, p);
1851}
1852
1853static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1854                                struct file *file, void *fh, void *arg)
1855{
1856        struct video_device *vfd = video_devdata(file);
1857        const struct v4l2_frequency *p = arg;
1858        enum v4l2_tuner_type type;
1859        int ret;
1860
1861        ret = v4l_enable_media_source(vfd);
1862        if (ret)
1863                return ret;
1864        if (vfd->vfl_type == VFL_TYPE_SDR) {
1865                if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1866                        return -EINVAL;
1867        } else {
1868                type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1869                                V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1870                if (type != p->type)
1871                        return -EINVAL;
1872        }
1873        return ops->vidioc_s_frequency(file, fh, p);
1874}
1875
1876static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1877                                struct file *file, void *fh, void *arg)
1878{
1879        struct video_device *vfd = video_devdata(file);
1880        struct v4l2_standard *p = arg;
1881
1882        return v4l_video_std_enumstd(p, vfd->tvnorms);
1883}
1884
1885static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1886                                struct file *file, void *fh, void *arg)
1887{
1888        struct video_device *vfd = video_devdata(file);
1889        v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1890        int ret;
1891
1892        ret = v4l_enable_media_source(vfd);
1893        if (ret)
1894                return ret;
1895        norm = id & vfd->tvnorms;
1896        if (vfd->tvnorms && !norm)      /* Check if std is supported */
1897                return -EINVAL;
1898
1899        /* Calls the specific handler */
1900        return ops->vidioc_s_std(file, fh, norm);
1901}
1902
1903static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1904                                struct file *file, void *fh, void *arg)
1905{
1906        struct video_device *vfd = video_devdata(file);
1907        v4l2_std_id *p = arg;
1908        int ret;
1909
1910        ret = v4l_enable_media_source(vfd);
1911        if (ret)
1912                return ret;
1913        /*
1914         * If no signal is detected, then the driver should return
1915         * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1916         * any standards that do not apply removed.
1917         *
1918         * This means that tuners, audio and video decoders can join
1919         * their efforts to improve the standards detection.
1920         */
1921        *p = vfd->tvnorms;
1922        return ops->vidioc_querystd(file, fh, arg);
1923}
1924
1925static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1926                                struct file *file, void *fh, void *arg)
1927{
1928        struct video_device *vfd = video_devdata(file);
1929        struct v4l2_hw_freq_seek *p = arg;
1930        enum v4l2_tuner_type type;
1931        int ret;
1932
1933        ret = v4l_enable_media_source(vfd);
1934        if (ret)
1935                return ret;
1936        /* s_hw_freq_seek is not supported for SDR for now */
1937        if (vfd->vfl_type == VFL_TYPE_SDR)
1938                return -EINVAL;
1939
1940        type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1941                V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1942        if (p->type != type)
1943                return -EINVAL;
1944        return ops->vidioc_s_hw_freq_seek(file, fh, p);
1945}
1946
1947static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1948                                struct file *file, void *fh, void *arg)
1949{
1950        return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1951}
1952
1953static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1954                                struct file *file, void *fh, void *arg)
1955{
1956        struct v4l2_requestbuffers *p = arg;
1957        int ret = check_fmt(file, p->type);
1958
1959        if (ret)
1960                return ret;
1961
1962        CLEAR_AFTER_FIELD(p, capabilities);
1963
1964        return ops->vidioc_reqbufs(file, fh, p);
1965}
1966
1967static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1968                                struct file *file, void *fh, void *arg)
1969{
1970        struct v4l2_buffer *p = arg;
1971        int ret = check_fmt(file, p->type);
1972
1973        return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1974}
1975
1976static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1977                                struct file *file, void *fh, void *arg)
1978{
1979        struct v4l2_buffer *p = arg;
1980        int ret = check_fmt(file, p->type);
1981
1982        return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1983}
1984
1985static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1986                                struct file *file, void *fh, void *arg)
1987{
1988        struct v4l2_buffer *p = arg;
1989        int ret = check_fmt(file, p->type);
1990
1991        return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1992}
1993
1994static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1995                                struct file *file, void *fh, void *arg)
1996{
1997        struct v4l2_create_buffers *create = arg;
1998        int ret = check_fmt(file, create->format.type);
1999
2000        if (ret)
2001                return ret;
2002
2003        CLEAR_AFTER_FIELD(create, capabilities);
2004
2005        v4l_sanitize_format(&create->format);
2006
2007        ret = ops->vidioc_create_bufs(file, fh, create);
2008
2009        if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2010            create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2011                create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2012
2013        return ret;
2014}
2015
2016static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2017                                struct file *file, void *fh, void *arg)
2018{
2019        struct v4l2_buffer *b = arg;
2020        int ret = check_fmt(file, b->type);
2021
2022        return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2023}
2024
2025static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2026                                struct file *file, void *fh, void *arg)
2027{
2028        struct v4l2_streamparm *p = arg;
2029        v4l2_std_id std;
2030        int ret = check_fmt(file, p->type);
2031
2032        if (ret)
2033                return ret;
2034        if (ops->vidioc_g_parm)
2035                return ops->vidioc_g_parm(file, fh, p);
2036        if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2037            p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2038                return -EINVAL;
2039        p->parm.capture.readbuffers = 2;
2040        ret = ops->vidioc_g_std(file, fh, &std);
2041        if (ret == 0)
2042                v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2043        return ret;
2044}
2045
2046static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2047                                struct file *file, void *fh, void *arg)
2048{
2049        struct v4l2_streamparm *p = arg;
2050        int ret = check_fmt(file, p->type);
2051
2052        if (ret)
2053                return ret;
2054
2055        /* Note: extendedmode is never used in drivers */
2056        if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2057                memset(p->parm.output.reserved, 0,
2058                       sizeof(p->parm.output.reserved));
2059                p->parm.output.extendedmode = 0;
2060                p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2061        } else {
2062                memset(p->parm.capture.reserved, 0,
2063                       sizeof(p->parm.capture.reserved));
2064                p->parm.capture.extendedmode = 0;
2065                p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2066        }
2067        return ops->vidioc_s_parm(file, fh, p);
2068}
2069
2070static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2071                                struct file *file, void *fh, void *arg)
2072{
2073        struct video_device *vfd = video_devdata(file);
2074        struct v4l2_queryctrl *p = arg;
2075        struct v4l2_fh *vfh =
2076                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2077
2078        if (vfh && vfh->ctrl_handler)
2079                return v4l2_queryctrl(vfh->ctrl_handler, p);
2080        if (vfd->ctrl_handler)
2081                return v4l2_queryctrl(vfd->ctrl_handler, p);
2082        if (ops->vidioc_queryctrl)
2083                return ops->vidioc_queryctrl(file, fh, p);
2084        return -ENOTTY;
2085}
2086
2087static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2088                                struct file *file, void *fh, void *arg)
2089{
2090        struct video_device *vfd = video_devdata(file);
2091        struct v4l2_query_ext_ctrl *p = arg;
2092        struct v4l2_fh *vfh =
2093                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2094
2095        if (vfh && vfh->ctrl_handler)
2096                return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2097        if (vfd->ctrl_handler)
2098                return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2099        if (ops->vidioc_query_ext_ctrl)
2100                return ops->vidioc_query_ext_ctrl(file, fh, p);
2101        return -ENOTTY;
2102}
2103
2104static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2105                                struct file *file, void *fh, void *arg)
2106{
2107        struct video_device *vfd = video_devdata(file);
2108        struct v4l2_querymenu *p = arg;
2109        struct v4l2_fh *vfh =
2110                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2111
2112        if (vfh && vfh->ctrl_handler)
2113                return v4l2_querymenu(vfh->ctrl_handler, p);
2114        if (vfd->ctrl_handler)
2115                return v4l2_querymenu(vfd->ctrl_handler, p);
2116        if (ops->vidioc_querymenu)
2117                return ops->vidioc_querymenu(file, fh, p);
2118        return -ENOTTY;
2119}
2120
2121static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2122                                struct file *file, void *fh, void *arg)
2123{
2124        struct video_device *vfd = video_devdata(file);
2125        struct v4l2_control *p = arg;
2126        struct v4l2_fh *vfh =
2127                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2128        struct v4l2_ext_controls ctrls;
2129        struct v4l2_ext_control ctrl;
2130
2131        if (vfh && vfh->ctrl_handler)
2132                return v4l2_g_ctrl(vfh->ctrl_handler, p);
2133        if (vfd->ctrl_handler)
2134                return v4l2_g_ctrl(vfd->ctrl_handler, p);
2135        if (ops->vidioc_g_ctrl)
2136                return ops->vidioc_g_ctrl(file, fh, p);
2137        if (ops->vidioc_g_ext_ctrls == NULL)
2138                return -ENOTTY;
2139
2140        ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2141        ctrls.count = 1;
2142        ctrls.controls = &ctrl;
2143        ctrl.id = p->id;
2144        ctrl.value = p->value;
2145        if (check_ext_ctrls(&ctrls, 1)) {
2146                int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2147
2148                if (ret == 0)
2149                        p->value = ctrl.value;
2150                return ret;
2151        }
2152        return -EINVAL;
2153}
2154
2155static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2156                                struct file *file, void *fh, void *arg)
2157{
2158        struct video_device *vfd = video_devdata(file);
2159        struct v4l2_control *p = arg;
2160        struct v4l2_fh *vfh =
2161                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2162        struct v4l2_ext_controls ctrls;
2163        struct v4l2_ext_control ctrl;
2164
2165        if (vfh && vfh->ctrl_handler)
2166                return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2167        if (vfd->ctrl_handler)
2168                return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2169        if (ops->vidioc_s_ctrl)
2170                return ops->vidioc_s_ctrl(file, fh, p);
2171        if (ops->vidioc_s_ext_ctrls == NULL)
2172                return -ENOTTY;
2173
2174        ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2175        ctrls.count = 1;
2176        ctrls.controls = &ctrl;
2177        ctrl.id = p->id;
2178        ctrl.value = p->value;
2179        if (check_ext_ctrls(&ctrls, 1))
2180                return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2181        return -EINVAL;
2182}
2183
2184static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2185                                struct file *file, void *fh, void *arg)
2186{
2187        struct video_device *vfd = video_devdata(file);
2188        struct v4l2_ext_controls *p = arg;
2189        struct v4l2_fh *vfh =
2190                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2191
2192        p->error_idx = p->count;
2193        if (vfh && vfh->ctrl_handler)
2194                return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2195                                        vfd, vfd->v4l2_dev->mdev, p);
2196        if (vfd->ctrl_handler)
2197                return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2198                                        vfd, vfd->v4l2_dev->mdev, p);
2199        if (ops->vidioc_g_ext_ctrls == NULL)
2200                return -ENOTTY;
2201        return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2202                                        -EINVAL;
2203}
2204
2205static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2206                                struct file *file, void *fh, void *arg)
2207{
2208        struct video_device *vfd = video_devdata(file);
2209        struct v4l2_ext_controls *p = arg;
2210        struct v4l2_fh *vfh =
2211                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2212
2213        p->error_idx = p->count;
2214        if (vfh && vfh->ctrl_handler)
2215                return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2216                                        vfd, vfd->v4l2_dev->mdev, p);
2217        if (vfd->ctrl_handler)
2218                return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2219                                        vfd, vfd->v4l2_dev->mdev, p);
2220        if (ops->vidioc_s_ext_ctrls == NULL)
2221                return -ENOTTY;
2222        return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2223                                        -EINVAL;
2224}
2225
2226static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2227                                struct file *file, void *fh, void *arg)
2228{
2229        struct video_device *vfd = video_devdata(file);
2230        struct v4l2_ext_controls *p = arg;
2231        struct v4l2_fh *vfh =
2232                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2233
2234        p->error_idx = p->count;
2235        if (vfh && vfh->ctrl_handler)
2236                return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2237                                          vfd, vfd->v4l2_dev->mdev, p);
2238        if (vfd->ctrl_handler)
2239                return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2240                                          vfd, vfd->v4l2_dev->mdev, p);
2241        if (ops->vidioc_try_ext_ctrls == NULL)
2242                return -ENOTTY;
2243        return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2244                                        -EINVAL;
2245}
2246
2247/*
2248 * The selection API specified originally that the _MPLANE buffer types
2249 * shouldn't be used. The reasons for this are lost in the mists of time
2250 * (or just really crappy memories). Regardless, this is really annoying
2251 * for userspace. So to keep things simple we map _MPLANE buffer types
2252 * to their 'regular' counterparts before calling the driver. And we
2253 * restore it afterwards. This way applications can use either buffer
2254 * type and drivers don't need to check for both.
2255 */
2256static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2257                           struct file *file, void *fh, void *arg)
2258{
2259        struct v4l2_selection *p = arg;
2260        u32 old_type = p->type;
2261        int ret;
2262
2263        if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2264                p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2265        else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2266                p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2267        ret = ops->vidioc_g_selection(file, fh, p);
2268        p->type = old_type;
2269        return ret;
2270}
2271
2272static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2273                           struct file *file, void *fh, void *arg)
2274{
2275        struct v4l2_selection *p = arg;
2276        u32 old_type = p->type;
2277        int ret;
2278
2279        if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2280                p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2281        else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2282                p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2283        ret = ops->vidioc_s_selection(file, fh, p);
2284        p->type = old_type;
2285        return ret;
2286}
2287
2288static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2289                                struct file *file, void *fh, void *arg)
2290{
2291        struct video_device *vfd = video_devdata(file);
2292        struct v4l2_crop *p = arg;
2293        struct v4l2_selection s = {
2294                .type = p->type,
2295        };
2296        int ret;
2297
2298        /* simulate capture crop using selection api */
2299
2300        /* crop means compose for output devices */
2301        if (V4L2_TYPE_IS_OUTPUT(p->type))
2302                s.target = V4L2_SEL_TGT_COMPOSE;
2303        else
2304                s.target = V4L2_SEL_TGT_CROP;
2305
2306        if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2307                s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2308                        V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2309
2310        ret = v4l_g_selection(ops, file, fh, &s);
2311
2312        /* copying results to old structure on success */
2313        if (!ret)
2314                p->c = s.r;
2315        return ret;
2316}
2317
2318static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2319                                struct file *file, void *fh, void *arg)
2320{
2321        struct video_device *vfd = video_devdata(file);
2322        struct v4l2_crop *p = arg;
2323        struct v4l2_selection s = {
2324                .type = p->type,
2325                .r = p->c,
2326        };
2327
2328        /* simulate capture crop using selection api */
2329
2330        /* crop means compose for output devices */
2331        if (V4L2_TYPE_IS_OUTPUT(p->type))
2332                s.target = V4L2_SEL_TGT_COMPOSE;
2333        else
2334                s.target = V4L2_SEL_TGT_CROP;
2335
2336        if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2337                s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2338                        V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2339
2340        return v4l_s_selection(ops, file, fh, &s);
2341}
2342
2343static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2344                                struct file *file, void *fh, void *arg)
2345{
2346        struct video_device *vfd = video_devdata(file);
2347        struct v4l2_cropcap *p = arg;
2348        struct v4l2_selection s = { .type = p->type };
2349        int ret = 0;
2350
2351        /* setting trivial pixelaspect */
2352        p->pixelaspect.numerator = 1;
2353        p->pixelaspect.denominator = 1;
2354
2355        if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2356                s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2357        else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2358                s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2359
2360        /*
2361         * The determine_valid_ioctls() call already should ensure
2362         * that this can never happen, but just in case...
2363         */
2364        if (WARN_ON(!ops->vidioc_g_selection))
2365                return -ENOTTY;
2366
2367        if (ops->vidioc_g_pixelaspect)
2368                ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2369                                                &p->pixelaspect);
2370
2371        /*
2372         * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2373         * square pixel aspect ratio in that case.
2374         */
2375        if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2376                return ret;
2377
2378        /* Use g_selection() to fill in the bounds and defrect rectangles */
2379
2380        /* obtaining bounds */
2381        if (V4L2_TYPE_IS_OUTPUT(p->type))
2382                s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2383        else
2384                s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2385
2386        if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2387                s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2388                        V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2389
2390        ret = v4l_g_selection(ops, file, fh, &s);
2391        if (ret)
2392                return ret;
2393        p->bounds = s.r;
2394
2395        /* obtaining defrect */
2396        if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2397                s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2398        else
2399                s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2400
2401        ret = v4l_g_selection(ops, file, fh, &s);
2402        if (ret)
2403                return ret;
2404        p->defrect = s.r;
2405
2406        return 0;
2407}
2408
2409static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2410                                struct file *file, void *fh, void *arg)
2411{
2412        struct video_device *vfd = video_devdata(file);
2413        int ret;
2414
2415        if (vfd->v4l2_dev)
2416                pr_info("%s: =================  START STATUS  =================\n",
2417                        vfd->v4l2_dev->name);
2418        ret = ops->vidioc_log_status(file, fh);
2419        if (vfd->v4l2_dev)
2420                pr_info("%s: ==================  END STATUS  ==================\n",
2421                        vfd->v4l2_dev->name);
2422        return ret;
2423}
2424
2425static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2426                                struct file *file, void *fh, void *arg)
2427{
2428#ifdef CONFIG_VIDEO_ADV_DEBUG
2429        struct v4l2_dbg_register *p = arg;
2430        struct video_device *vfd = video_devdata(file);
2431        struct v4l2_subdev *sd;
2432        int idx = 0;
2433
2434        if (!capable(CAP_SYS_ADMIN))
2435                return -EPERM;
2436        if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2437                if (vfd->v4l2_dev == NULL)
2438                        return -EINVAL;
2439                v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2440                        if (p->match.addr == idx++)
2441                                return v4l2_subdev_call(sd, core, g_register, p);
2442                return -EINVAL;
2443        }
2444        if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2445            (ops->vidioc_g_chip_info || p->match.addr == 0))
2446                return ops->vidioc_g_register(file, fh, p);
2447        return -EINVAL;
2448#else
2449        return -ENOTTY;
2450#endif
2451}
2452
2453static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2454                                struct file *file, void *fh, void *arg)
2455{
2456#ifdef CONFIG_VIDEO_ADV_DEBUG
2457        const struct v4l2_dbg_register *p = arg;
2458        struct video_device *vfd = video_devdata(file);
2459        struct v4l2_subdev *sd;
2460        int idx = 0;
2461
2462        if (!capable(CAP_SYS_ADMIN))
2463                return -EPERM;
2464        if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2465                if (vfd->v4l2_dev == NULL)
2466                        return -EINVAL;
2467                v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2468                        if (p->match.addr == idx++)
2469                                return v4l2_subdev_call(sd, core, s_register, p);
2470                return -EINVAL;
2471        }
2472        if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2473            (ops->vidioc_g_chip_info || p->match.addr == 0))
2474                return ops->vidioc_s_register(file, fh, p);
2475        return -EINVAL;
2476#else
2477        return -ENOTTY;
2478#endif
2479}
2480
2481static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2482                                struct file *file, void *fh, void *arg)
2483{
2484#ifdef CONFIG_VIDEO_ADV_DEBUG
2485        struct video_device *vfd = video_devdata(file);
2486        struct v4l2_dbg_chip_info *p = arg;
2487        struct v4l2_subdev *sd;
2488        int idx = 0;
2489
2490        switch (p->match.type) {
2491        case V4L2_CHIP_MATCH_BRIDGE:
2492                if (ops->vidioc_s_register)
2493                        p->flags |= V4L2_CHIP_FL_WRITABLE;
2494                if (ops->vidioc_g_register)
2495                        p->flags |= V4L2_CHIP_FL_READABLE;
2496                strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2497                if (ops->vidioc_g_chip_info)
2498                        return ops->vidioc_g_chip_info(file, fh, arg);
2499                if (p->match.addr)
2500                        return -EINVAL;
2501                return 0;
2502
2503        case V4L2_CHIP_MATCH_SUBDEV:
2504                if (vfd->v4l2_dev == NULL)
2505                        break;
2506                v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2507                        if (p->match.addr != idx++)
2508                                continue;
2509                        if (sd->ops->core && sd->ops->core->s_register)
2510                                p->flags |= V4L2_CHIP_FL_WRITABLE;
2511                        if (sd->ops->core && sd->ops->core->g_register)
2512                                p->flags |= V4L2_CHIP_FL_READABLE;
2513                        strscpy(p->name, sd->name, sizeof(p->name));
2514                        return 0;
2515                }
2516                break;
2517        }
2518        return -EINVAL;
2519#else
2520        return -ENOTTY;
2521#endif
2522}
2523
2524static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2525                                struct file *file, void *fh, void *arg)
2526{
2527        return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2528}
2529
2530static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2531                                struct file *file, void *fh, void *arg)
2532{
2533        return ops->vidioc_subscribe_event(fh, arg);
2534}
2535
2536static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2537                                struct file *file, void *fh, void *arg)
2538{
2539        return ops->vidioc_unsubscribe_event(fh, arg);
2540}
2541
2542static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2543                                struct file *file, void *fh, void *arg)
2544{
2545        struct v4l2_sliced_vbi_cap *p = arg;
2546        int ret = check_fmt(file, p->type);
2547
2548        if (ret)
2549                return ret;
2550
2551        /* Clear up to type, everything after type is zeroed already */
2552        memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2553
2554        return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2555}
2556
2557static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2558                                struct file *file, void *fh, void *arg)
2559{
2560        struct video_device *vfd = video_devdata(file);
2561        struct v4l2_frequency_band *p = arg;
2562        enum v4l2_tuner_type type;
2563        int err;
2564
2565        if (vfd->vfl_type == VFL_TYPE_SDR) {
2566                if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2567                        return -EINVAL;
2568                type = p->type;
2569        } else {
2570                type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2571                                V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2572                if (type != p->type)
2573                        return -EINVAL;
2574        }
2575        if (ops->vidioc_enum_freq_bands) {
2576                err = ops->vidioc_enum_freq_bands(file, fh, p);
2577                if (err != -ENOTTY)
2578                        return err;
2579        }
2580        if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2581                struct v4l2_tuner t = {
2582                        .index = p->tuner,
2583                        .type = type,
2584                };
2585
2586                if (p->index)
2587                        return -EINVAL;
2588                err = ops->vidioc_g_tuner(file, fh, &t);
2589                if (err)
2590                        return err;
2591                p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2592                p->rangelow = t.rangelow;
2593                p->rangehigh = t.rangehigh;
2594                p->modulation = (type == V4L2_TUNER_RADIO) ?
2595                        V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2596                return 0;
2597        }
2598        if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2599                struct v4l2_modulator m = {
2600                        .index = p->tuner,
2601                };
2602
2603                if (type != V4L2_TUNER_RADIO)
2604                        return -EINVAL;
2605                if (p->index)
2606                        return -EINVAL;
2607                err = ops->vidioc_g_modulator(file, fh, &m);
2608                if (err)
2609                        return err;
2610                p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2611                p->rangelow = m.rangelow;
2612                p->rangehigh = m.rangehigh;
2613                p->modulation = (type == V4L2_TUNER_RADIO) ?
2614                        V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2615                return 0;
2616        }
2617        return -ENOTTY;
2618}
2619
2620struct v4l2_ioctl_info {
2621        unsigned int ioctl;
2622        u32 flags;
2623        const char * const name;
2624        int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2625                    void *fh, void *p);
2626        void (*debug)(const void *arg, bool write_only);
2627};
2628
2629/* This control needs a priority check */
2630#define INFO_FL_PRIO            (1 << 0)
2631/* This control can be valid if the filehandle passes a control handler. */
2632#define INFO_FL_CTRL            (1 << 1)
2633/* Queuing ioctl */
2634#define INFO_FL_QUEUE           (1 << 2)
2635/* Always copy back result, even on error */
2636#define INFO_FL_ALWAYS_COPY     (1 << 3)
2637/* Zero struct from after the field to the end */
2638#define INFO_FL_CLEAR(v4l2_struct, field)                       \
2639        ((offsetof(struct v4l2_struct, field) +                 \
2640          sizeof(((struct v4l2_struct *)0)->field)) << 16)
2641#define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2642
2643#define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2644        static int v4l_stub_ ## _vidioc(                        \
2645                        const struct v4l2_ioctl_ops *ops,       \
2646                        struct file *file, void *fh, void *p)   \
2647        {                                                       \
2648                return ops->vidioc_ ## _vidioc(file, fh, p);    \
2649        }
2650
2651#define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2652        [_IOC_NR(_ioctl)] = {                                   \
2653                .ioctl = _ioctl,                                \
2654                .flags = _flags,                                \
2655                .name = #_ioctl,                                \
2656                .func = _func,                                  \
2657                .debug = _debug,                                \
2658        }
2659
2660DEFINE_V4L_STUB_FUNC(g_fbuf)
2661DEFINE_V4L_STUB_FUNC(s_fbuf)
2662DEFINE_V4L_STUB_FUNC(expbuf)
2663DEFINE_V4L_STUB_FUNC(g_std)
2664DEFINE_V4L_STUB_FUNC(g_audio)
2665DEFINE_V4L_STUB_FUNC(s_audio)
2666DEFINE_V4L_STUB_FUNC(g_input)
2667DEFINE_V4L_STUB_FUNC(g_edid)
2668DEFINE_V4L_STUB_FUNC(s_edid)
2669DEFINE_V4L_STUB_FUNC(g_output)
2670DEFINE_V4L_STUB_FUNC(g_audout)
2671DEFINE_V4L_STUB_FUNC(s_audout)
2672DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2673DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2674DEFINE_V4L_STUB_FUNC(enumaudio)
2675DEFINE_V4L_STUB_FUNC(enumaudout)
2676DEFINE_V4L_STUB_FUNC(enum_framesizes)
2677DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2678DEFINE_V4L_STUB_FUNC(g_enc_index)
2679DEFINE_V4L_STUB_FUNC(encoder_cmd)
2680DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2681DEFINE_V4L_STUB_FUNC(decoder_cmd)
2682DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2683DEFINE_V4L_STUB_FUNC(s_dv_timings)
2684DEFINE_V4L_STUB_FUNC(g_dv_timings)
2685DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2686DEFINE_V4L_STUB_FUNC(query_dv_timings)
2687DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2688
2689static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2690        IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2691        IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2692        IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2693        IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2694        IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2695        IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2696        IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2697        IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2698        IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2699        IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2700        IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2701        IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2702        IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2703        IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2704        IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2705        IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2706        IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2707        IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2708        IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2709        IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2710        IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2711        IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2712        IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2713        IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2714        IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2715        IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2716        IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2717        IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2718        IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0),
2719        IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2720        IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2721        IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2722        IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0),
2723        IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2724        IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2725        IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2726        IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2727        IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2728        IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2729        IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2730        IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2731        IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2732        IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2733        IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2734        IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2735        IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2736        IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2737        IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2738        IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2739        IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2740        IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2741        IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2742        IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2743        IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2744        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)),
2745        IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2746        IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2747        IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2748        IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2749        IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2750        IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2751        IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2752        IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2753        IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2754        IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2755        IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2756        IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2757        IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2758        IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2759        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)),
2760        IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2761        IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2762        IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2763        IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2764        IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2765        IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2766        IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2767        IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2768        IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2769        IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2770        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)),
2771        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)),
2772};
2773#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2774
2775static bool v4l2_is_known_ioctl(unsigned int cmd)
2776{
2777        if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2778                return false;
2779        return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2780}
2781
2782static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2783                                         struct v4l2_fh *vfh, unsigned int cmd,
2784                                         void *arg)
2785{
2786        if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2787                return vdev->lock;
2788#if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
2789        if (vfh && vfh->m2m_ctx &&
2790            (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2791                if (vfh->m2m_ctx->q_lock)
2792                        return vfh->m2m_ctx->q_lock;
2793        }
2794#endif
2795        if (vdev->queue && vdev->queue->lock &&
2796                        (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2797                return vdev->queue->lock;
2798        return vdev->lock;
2799}
2800
2801/* Common ioctl debug function. This function can be used by
2802   external ioctl messages as well as internal V4L ioctl */
2803void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2804{
2805        const char *dir, *type;
2806
2807        if (prefix)
2808                printk(KERN_DEBUG "%s: ", prefix);
2809
2810        switch (_IOC_TYPE(cmd)) {
2811        case 'd':
2812                type = "v4l2_int";
2813                break;
2814        case 'V':
2815                if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2816                        type = "v4l2";
2817                        break;
2818                }
2819                pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2820                return;
2821        default:
2822                type = "unknown";
2823                break;
2824        }
2825
2826        switch (_IOC_DIR(cmd)) {
2827        case _IOC_NONE:              dir = "--"; break;
2828        case _IOC_READ:              dir = "r-"; break;
2829        case _IOC_WRITE:             dir = "-w"; break;
2830        case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2831        default:                     dir = "*ERR*"; break;
2832        }
2833        pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2834                type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2835}
2836EXPORT_SYMBOL(v4l_printk_ioctl);
2837
2838static long __video_do_ioctl(struct file *file,
2839                unsigned int cmd, void *arg)
2840{
2841        struct video_device *vfd = video_devdata(file);
2842        struct mutex *req_queue_lock = NULL;
2843        struct mutex *lock; /* ioctl serialization mutex */
2844        const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2845        bool write_only = false;
2846        struct v4l2_ioctl_info default_info;
2847        const struct v4l2_ioctl_info *info;
2848        void *fh = file->private_data;
2849        struct v4l2_fh *vfh = NULL;
2850        int dev_debug = vfd->dev_debug;
2851        long ret = -ENOTTY;
2852
2853        if (ops == NULL) {
2854                pr_warn("%s: has no ioctl_ops.\n",
2855                                video_device_node_name(vfd));
2856                return ret;
2857        }
2858
2859        if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2860                vfh = file->private_data;
2861
2862        /*
2863         * We need to serialize streamon/off with queueing new requests.
2864         * These ioctls may trigger the cancellation of a streaming
2865         * operation, and that should not be mixed with queueing a new
2866         * request at the same time.
2867         */
2868        if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2869            (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2870                req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2871
2872                if (mutex_lock_interruptible(req_queue_lock))
2873                        return -ERESTARTSYS;
2874        }
2875
2876        lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2877
2878        if (lock && mutex_lock_interruptible(lock)) {
2879                if (req_queue_lock)
2880                        mutex_unlock(req_queue_lock);
2881                return -ERESTARTSYS;
2882        }
2883
2884        if (!video_is_registered(vfd)) {
2885                ret = -ENODEV;
2886                goto unlock;
2887        }
2888
2889        if (v4l2_is_known_ioctl(cmd)) {
2890                info = &v4l2_ioctls[_IOC_NR(cmd)];
2891
2892                if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2893                    !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2894                        goto done;
2895
2896                if (vfh && (info->flags & INFO_FL_PRIO)) {
2897                        ret = v4l2_prio_check(vfd->prio, vfh->prio);
2898                        if (ret)
2899                                goto done;
2900                }
2901        } else {
2902                default_info.ioctl = cmd;
2903                default_info.flags = 0;
2904                default_info.debug = v4l_print_default;
2905                info = &default_info;
2906        }
2907
2908        write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2909        if (info != &default_info) {
2910                ret = info->func(ops, file, fh, arg);
2911        } else if (!ops->vidioc_default) {
2912                ret = -ENOTTY;
2913        } else {
2914                ret = ops->vidioc_default(file, fh,
2915                        vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2916                        cmd, arg);
2917        }
2918
2919done:
2920        if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2921                if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2922                    (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2923                        goto unlock;
2924
2925                v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2926                if (ret < 0)
2927                        pr_cont(": error %ld", ret);
2928                if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2929                        pr_cont("\n");
2930                else if (_IOC_DIR(cmd) == _IOC_NONE)
2931                        info->debug(arg, write_only);
2932                else {
2933                        pr_cont(": ");
2934                        info->debug(arg, write_only);
2935                }
2936        }
2937
2938unlock:
2939        if (lock)
2940                mutex_unlock(lock);
2941        if (req_queue_lock)
2942                mutex_unlock(req_queue_lock);
2943        return ret;
2944}
2945
2946static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2947                            void __user **user_ptr, void ***kernel_ptr)
2948{
2949        int ret = 0;
2950
2951        switch (cmd) {
2952        case VIDIOC_PREPARE_BUF:
2953        case VIDIOC_QUERYBUF:
2954        case VIDIOC_QBUF:
2955        case VIDIOC_DQBUF: {
2956                struct v4l2_buffer *buf = parg;
2957
2958                if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2959                        if (buf->length > VIDEO_MAX_PLANES) {
2960                                ret = -EINVAL;
2961                                break;
2962                        }
2963                        *user_ptr = (void __user *)buf->m.planes;
2964                        *kernel_ptr = (void **)&buf->m.planes;
2965                        *array_size = sizeof(struct v4l2_plane) * buf->length;
2966                        ret = 1;
2967                }
2968                break;
2969        }
2970
2971        case VIDIOC_G_EDID:
2972        case VIDIOC_S_EDID: {
2973                struct v4l2_edid *edid = parg;
2974
2975                if (edid->blocks) {
2976                        if (edid->blocks > 256) {
2977                                ret = -EINVAL;
2978                                break;
2979                        }
2980                        *user_ptr = (void __user *)edid->edid;
2981                        *kernel_ptr = (void **)&edid->edid;
2982                        *array_size = edid->blocks * 128;
2983                        ret = 1;
2984                }
2985                break;
2986        }
2987
2988        case VIDIOC_S_EXT_CTRLS:
2989        case VIDIOC_G_EXT_CTRLS:
2990        case VIDIOC_TRY_EXT_CTRLS: {
2991                struct v4l2_ext_controls *ctrls = parg;
2992
2993                if (ctrls->count != 0) {
2994                        if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2995                                ret = -EINVAL;
2996                                break;
2997                        }
2998                        *user_ptr = (void __user *)ctrls->controls;
2999                        *kernel_ptr = (void **)&ctrls->controls;
3000                        *array_size = sizeof(struct v4l2_ext_control)
3001                                    * ctrls->count;
3002                        ret = 1;
3003                }
3004                break;
3005        }
3006        }
3007
3008        return ret;
3009}
3010
3011long
3012video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
3013               v4l2_kioctl func)
3014{
3015        char    sbuf[128];
3016        void    *mbuf = NULL;
3017        void    *parg = (void *)arg;
3018        long    err  = -EINVAL;
3019        bool    has_array_args;
3020        bool    always_copy = false;
3021        size_t  array_size = 0;
3022        void __user *user_ptr = NULL;
3023        void    **kernel_ptr = NULL;
3024        const size_t ioc_size = _IOC_SIZE(cmd);
3025
3026        /*  Copy arguments into temp kernel buffer  */
3027        if (_IOC_DIR(cmd) != _IOC_NONE) {
3028                if (ioc_size <= sizeof(sbuf)) {
3029                        parg = sbuf;
3030                } else {
3031                        /* too big to allocate from stack */
3032                        mbuf = kvmalloc(ioc_size, GFP_KERNEL);
3033                        if (NULL == mbuf)
3034                                return -ENOMEM;
3035                        parg = mbuf;
3036                }
3037
3038                err = -EFAULT;
3039                if (_IOC_DIR(cmd) & _IOC_WRITE) {
3040                        unsigned int n = ioc_size;
3041
3042                        /*
3043                         * In some cases, only a few fields are used as input,
3044                         * i.e. when the app sets "index" and then the driver
3045                         * fills in the rest of the structure for the thing
3046                         * with that index.  We only need to copy up the first
3047                         * non-input field.
3048                         */
3049                        if (v4l2_is_known_ioctl(cmd)) {
3050                                u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
3051
3052                                if (flags & INFO_FL_CLEAR_MASK)
3053                                        n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3054                                always_copy = flags & INFO_FL_ALWAYS_COPY;
3055                        }
3056
3057                        if (copy_from_user(parg, (void __user *)arg, n))
3058                                goto out;
3059
3060                        /* zero out anything we don't copy from userspace */
3061                        if (n < ioc_size)
3062                                memset((u8 *)parg + n, 0, ioc_size - n);
3063                } else {
3064                        /* read-only ioctl */
3065                        memset(parg, 0, ioc_size);
3066                }
3067        }
3068
3069        err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3070        if (err < 0)
3071                goto out;
3072        has_array_args = err;
3073
3074        if (has_array_args) {
3075                /*
3076                 * When adding new types of array args, make sure that the
3077                 * parent argument to ioctl (which contains the pointer to the
3078                 * array) fits into sbuf (so that mbuf will still remain
3079                 * unused up to here).
3080                 */
3081                mbuf = kvmalloc(array_size, GFP_KERNEL);
3082                err = -ENOMEM;
3083                if (NULL == mbuf)
3084                        goto out_array_args;
3085                err = -EFAULT;
3086                if (copy_from_user(mbuf, user_ptr, array_size))
3087                        goto out_array_args;
3088                *kernel_ptr = mbuf;
3089        }
3090
3091        /* Handles IOCTL */
3092        err = func(file, cmd, parg);
3093        if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3094                err = -ENOTTY;
3095                goto out;
3096        }
3097
3098        if (err == 0) {
3099                if (cmd == VIDIOC_DQBUF)
3100                        trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3101                else if (cmd == VIDIOC_QBUF)
3102                        trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3103        }
3104
3105        if (has_array_args) {
3106                *kernel_ptr = (void __force *)user_ptr;
3107                if (copy_to_user(user_ptr, mbuf, array_size))
3108                        err = -EFAULT;
3109                goto out_array_args;
3110        }
3111        /*
3112         * Some ioctls can return an error, but still have valid
3113         * results that must be returned.
3114         */
3115        if (err < 0 && !always_copy)
3116                goto out;
3117
3118out_array_args:
3119        /*  Copy results into user buffer  */
3120        switch (_IOC_DIR(cmd)) {
3121        case _IOC_READ:
3122        case (_IOC_WRITE | _IOC_READ):
3123                if (copy_to_user((void __user *)arg, parg, ioc_size))
3124                        err = -EFAULT;
3125                break;
3126        }
3127
3128out:
3129        kvfree(mbuf);
3130        return err;
3131}
3132
3133long video_ioctl2(struct file *file,
3134               unsigned int cmd, unsigned long arg)
3135{
3136        return video_usercopy(file, cmd, arg, __video_do_ioctl);
3137}
3138EXPORT_SYMBOL(video_ioctl2);
3139