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v4l2-ioctl.c
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v4l2-ioctl.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Video capture interface for Linux version 2
*
* A generic framework to process V4L2 ioctl commands.
*
* Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
* Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
*/
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/v4l2-device.h>
#include <media/videobuf2-v4l2.h>
#include <media/v4l2-mc.h>
#include <media/v4l2-mem2mem.h>
#include <trace/events/v4l2.h>
/* Zero out the end of the struct pointed to by p. Everything after, but
* not including, the specified field is cleared. */
#define CLEAR_AFTER_FIELD(p, field) \
memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
struct std_descr {
v4l2_std_id std;
const char *descr;
};
static const struct std_descr standards[] = {
{ V4L2_STD_NTSC, "NTSC" },
{ V4L2_STD_NTSC_M, "NTSC-M" },
{ V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
{ V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
{ V4L2_STD_NTSC_443, "NTSC-443" },
{ V4L2_STD_PAL, "PAL" },
{ V4L2_STD_PAL_BG, "PAL-BG" },
{ V4L2_STD_PAL_B, "PAL-B" },
{ V4L2_STD_PAL_B1, "PAL-B1" },
{ V4L2_STD_PAL_G, "PAL-G" },
{ V4L2_STD_PAL_H, "PAL-H" },
{ V4L2_STD_PAL_I, "PAL-I" },
{ V4L2_STD_PAL_DK, "PAL-DK" },
{ V4L2_STD_PAL_D, "PAL-D" },
{ V4L2_STD_PAL_D1, "PAL-D1" },
{ V4L2_STD_PAL_K, "PAL-K" },
{ V4L2_STD_PAL_M, "PAL-M" },
{ V4L2_STD_PAL_N, "PAL-N" },
{ V4L2_STD_PAL_Nc, "PAL-Nc" },
{ V4L2_STD_PAL_60, "PAL-60" },
{ V4L2_STD_SECAM, "SECAM" },
{ V4L2_STD_SECAM_B, "SECAM-B" },
{ V4L2_STD_SECAM_G, "SECAM-G" },
{ V4L2_STD_SECAM_H, "SECAM-H" },
{ V4L2_STD_SECAM_DK, "SECAM-DK" },
{ V4L2_STD_SECAM_D, "SECAM-D" },
{ V4L2_STD_SECAM_K, "SECAM-K" },
{ V4L2_STD_SECAM_K1, "SECAM-K1" },
{ V4L2_STD_SECAM_L, "SECAM-L" },
{ V4L2_STD_SECAM_LC, "SECAM-Lc" },
{ 0, "Unknown" }
};
/* video4linux standard ID conversion to standard name
*/
const char *v4l2_norm_to_name(v4l2_std_id id)
{
u32 myid = id;
int i;
/* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
64 bit comparisons. So, on that architecture, with some gcc
variants, compilation fails. Currently, the max value is 30bit wide.
*/
BUG_ON(myid != id);
for (i = 0; standards[i].std; i++)
if (myid == standards[i].std)
break;
return standards[i].descr;
}
EXPORT_SYMBOL(v4l2_norm_to_name);
/* Returns frame period for the given standard */
void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
{
if (id & V4L2_STD_525_60) {
frameperiod->numerator = 1001;
frameperiod->denominator = 30000;
} else {
frameperiod->numerator = 1;
frameperiod->denominator = 25;
}
}
EXPORT_SYMBOL(v4l2_video_std_frame_period);
/* Fill in the fields of a v4l2_standard structure according to the
'id' and 'transmission' parameters. Returns negative on error. */
int v4l2_video_std_construct(struct v4l2_standard *vs,
int id, const char *name)
{
vs->id = id;
v4l2_video_std_frame_period(id, &vs->frameperiod);
vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
strscpy(vs->name, name, sizeof(vs->name));
return 0;
}
EXPORT_SYMBOL(v4l2_video_std_construct);
/* Fill in the fields of a v4l2_standard structure according to the
* 'id' and 'vs->index' parameters. Returns negative on error. */
int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
{
v4l2_std_id curr_id = 0;
unsigned int index = vs->index, i, j = 0;
const char *descr = "";
/* Return -ENODATA if the id for the current input
or output is 0, meaning that it doesn't support this API. */
if (id == 0)
return -ENODATA;
/* Return norm array in a canonical way */
for (i = 0; i <= index && id; i++) {
/* last std value in the standards array is 0, so this
while always ends there since (id & 0) == 0. */
while ((id & standards[j].std) != standards[j].std)
j++;
curr_id = standards[j].std;
descr = standards[j].descr;
j++;
if (curr_id == 0)
break;
if (curr_id != V4L2_STD_PAL &&
curr_id != V4L2_STD_SECAM &&
curr_id != V4L2_STD_NTSC)
id &= ~curr_id;
}
if (i <= index)
return -EINVAL;
v4l2_video_std_construct(vs, curr_id, descr);
return 0;
}
/* ----------------------------------------------------------------- */
/* some arrays for pretty-printing debug messages of enum types */
const char *v4l2_field_names[] = {
[V4L2_FIELD_ANY] = "any",
[V4L2_FIELD_NONE] = "none",
[V4L2_FIELD_TOP] = "top",
[V4L2_FIELD_BOTTOM] = "bottom",
[V4L2_FIELD_INTERLACED] = "interlaced",
[V4L2_FIELD_SEQ_TB] = "seq-tb",
[V4L2_FIELD_SEQ_BT] = "seq-bt",
[V4L2_FIELD_ALTERNATE] = "alternate",
[V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
[V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
};
EXPORT_SYMBOL(v4l2_field_names);
const char *v4l2_type_names[] = {
[0] = "0",
[V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
[V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
[V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
[V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
[V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
[V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
[V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
[V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
[V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
[V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
[V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap",
[V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out",
[V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap",
[V4L2_BUF_TYPE_META_OUTPUT] = "meta-out",
};
EXPORT_SYMBOL(v4l2_type_names);
static const char *v4l2_memory_names[] = {
[V4L2_MEMORY_MMAP] = "mmap",
[V4L2_MEMORY_USERPTR] = "userptr",
[V4L2_MEMORY_OVERLAY] = "overlay",
[V4L2_MEMORY_DMABUF] = "dmabuf",
};
#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
/* ------------------------------------------------------------------ */
/* debug help functions */
static void v4l_print_querycap(const void *arg, bool write_only)
{
const struct v4l2_capability *p = arg;
pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
(int)sizeof(p->driver), p->driver,
(int)sizeof(p->card), p->card,
(int)sizeof(p->bus_info), p->bus_info,
p->version, p->capabilities, p->device_caps);
}
static void v4l_print_enuminput(const void *arg, bool write_only)
{
const struct v4l2_input *p = arg;
pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
p->tuner, (unsigned long long)p->std, p->status,
p->capabilities);
}
static void v4l_print_enumoutput(const void *arg, bool write_only)
{
const struct v4l2_output *p = arg;
pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
p->modulator, (unsigned long long)p->std, p->capabilities);
}
static void v4l_print_audio(const void *arg, bool write_only)
{
const struct v4l2_audio *p = arg;
if (write_only)
pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
else
pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
p->index, (int)sizeof(p->name), p->name,
p->capability, p->mode);
}
static void v4l_print_audioout(const void *arg, bool write_only)
{
const struct v4l2_audioout *p = arg;
if (write_only)
pr_cont("index=%u\n", p->index);
else
pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
p->index, (int)sizeof(p->name), p->name,
p->capability, p->mode);
}
static void v4l_print_fmtdesc(const void *arg, bool write_only)
{
const struct v4l2_fmtdesc *p = arg;
pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
p->index, prt_names(p->type, v4l2_type_names),
p->flags, (p->pixelformat & 0xff),
(p->pixelformat >> 8) & 0xff,
(p->pixelformat >> 16) & 0xff,
(p->pixelformat >> 24) & 0xff,
(int)sizeof(p->description), p->description);
}
static void v4l_print_format(const void *arg, bool write_only)
{
const struct v4l2_format *p = arg;
const struct v4l2_pix_format *pix;
const struct v4l2_pix_format_mplane *mp;
const struct v4l2_vbi_format *vbi;
const struct v4l2_sliced_vbi_format *sliced;
const struct v4l2_window *win;
const struct v4l2_sdr_format *sdr;
const struct v4l2_meta_format *meta;
u32 planes;
unsigned i;
pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
pix = &p->fmt.pix;
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",
pix->width, pix->height,
(pix->pixelformat & 0xff),
(pix->pixelformat >> 8) & 0xff,
(pix->pixelformat >> 16) & 0xff,
(pix->pixelformat >> 24) & 0xff,
prt_names(pix->field, v4l2_field_names),
pix->bytesperline, pix->sizeimage,
pix->colorspace, pix->flags, pix->ycbcr_enc,
pix->quantization, pix->xfer_func);
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
mp = &p->fmt.pix_mp;
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",
mp->width, mp->height,
(mp->pixelformat & 0xff),
(mp->pixelformat >> 8) & 0xff,
(mp->pixelformat >> 16) & 0xff,
(mp->pixelformat >> 24) & 0xff,
prt_names(mp->field, v4l2_field_names),
mp->colorspace, mp->num_planes, mp->flags,
mp->ycbcr_enc, mp->quantization, mp->xfer_func);
planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
for (i = 0; i < planes; i++)
printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
mp->plane_fmt[i].bytesperline,
mp->plane_fmt[i].sizeimage);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
win = &p->fmt.win;
/* Note: we can't print the clip list here since the clips
* pointer is a userspace pointer, not a kernelspace
* pointer. */
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",
win->w.width, win->w.height, win->w.left, win->w.top,
prt_names(win->field, v4l2_field_names),
win->chromakey, win->clipcount, win->clips,
win->bitmap, win->global_alpha);
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
case V4L2_BUF_TYPE_VBI_OUTPUT:
vbi = &p->fmt.vbi;
pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
vbi->sampling_rate, vbi->offset,
vbi->samples_per_line,
(vbi->sample_format & 0xff),
(vbi->sample_format >> 8) & 0xff,
(vbi->sample_format >> 16) & 0xff,
(vbi->sample_format >> 24) & 0xff,
vbi->start[0], vbi->start[1],
vbi->count[0], vbi->count[1]);
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
sliced = &p->fmt.sliced;
pr_cont(", service_set=0x%08x, io_size=%d\n",
sliced->service_set, sliced->io_size);
for (i = 0; i < 24; i++)
printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
sliced->service_lines[0][i],
sliced->service_lines[1][i]);
break;
case V4L2_BUF_TYPE_SDR_CAPTURE:
case V4L2_BUF_TYPE_SDR_OUTPUT:
sdr = &p->fmt.sdr;
pr_cont(", pixelformat=%c%c%c%c\n",
(sdr->pixelformat >> 0) & 0xff,
(sdr->pixelformat >> 8) & 0xff,
(sdr->pixelformat >> 16) & 0xff,
(sdr->pixelformat >> 24) & 0xff);
break;
case V4L2_BUF_TYPE_META_CAPTURE:
case V4L2_BUF_TYPE_META_OUTPUT:
meta = &p->fmt.meta;
pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
(meta->dataformat >> 0) & 0xff,
(meta->dataformat >> 8) & 0xff,
(meta->dataformat >> 16) & 0xff,
(meta->dataformat >> 24) & 0xff,
meta->buffersize);
break;
}
}
static void v4l_print_framebuffer(const void *arg, bool write_only)
{
const struct v4l2_framebuffer *p = arg;
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",
p->capability, p->flags, p->base,
p->fmt.width, p->fmt.height,
(p->fmt.pixelformat & 0xff),
(p->fmt.pixelformat >> 8) & 0xff,
(p->fmt.pixelformat >> 16) & 0xff,
(p->fmt.pixelformat >> 24) & 0xff,
p->fmt.bytesperline, p->fmt.sizeimage,
p->fmt.colorspace);
}
static void v4l_print_buftype(const void *arg, bool write_only)
{
pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
}
static void v4l_print_modulator(const void *arg, bool write_only)
{
const struct v4l2_modulator *p = arg;
if (write_only)
pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
else
pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
p->index, (int)sizeof(p->name), p->name, p->capability,
p->rangelow, p->rangehigh, p->txsubchans);
}
static void v4l_print_tuner(const void *arg, bool write_only)
{
const struct v4l2_tuner *p = arg;
if (write_only)
pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
else
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",
p->index, (int)sizeof(p->name), p->name, p->type,
p->capability, p->rangelow,
p->rangehigh, p->signal, p->afc,
p->rxsubchans, p->audmode);
}
static void v4l_print_frequency(const void *arg, bool write_only)
{
const struct v4l2_frequency *p = arg;
pr_cont("tuner=%u, type=%u, frequency=%u\n",
p->tuner, p->type, p->frequency);
}
static void v4l_print_standard(const void *arg, bool write_only)
{
const struct v4l2_standard *p = arg;
pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
p->index,
(unsigned long long)p->id, (int)sizeof(p->name), p->name,
p->frameperiod.numerator,
p->frameperiod.denominator,
p->framelines);
}
static void v4l_print_std(const void *arg, bool write_only)
{
pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
}
static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
{
const struct v4l2_hw_freq_seek *p = arg;
pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
p->rangelow, p->rangehigh);
}
static void v4l_print_requestbuffers(const void *arg, bool write_only)
{
const struct v4l2_requestbuffers *p = arg;
pr_cont("count=%d, type=%s, memory=%s\n",
p->count,
prt_names(p->type, v4l2_type_names),
prt_names(p->memory, v4l2_memory_names));
}
static void v4l_print_buffer(const void *arg, bool write_only)
{
const struct v4l2_buffer *p = arg;
const struct v4l2_timecode *tc = &p->timecode;
const struct v4l2_plane *plane;
int i;
pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
p->timestamp.tv_sec / 3600,
(int)(p->timestamp.tv_sec / 60) % 60,
(int)(p->timestamp.tv_sec % 60),
(long)p->timestamp.tv_usec,
p->index,
prt_names(p->type, v4l2_type_names), p->request_fd,
p->flags, prt_names(p->field, v4l2_field_names),
p->sequence, prt_names(p->memory, v4l2_memory_names));
if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
pr_cont("\n");
for (i = 0; i < p->length; ++i) {
plane = &p->m.planes[i];
printk(KERN_DEBUG
"plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
i, plane->bytesused, plane->data_offset,
plane->m.userptr, plane->length);
}
} else {
pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
p->bytesused, p->m.userptr, p->length);
}
printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
tc->hours, tc->minutes, tc->seconds,
tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
}
static void v4l_print_exportbuffer(const void *arg, bool write_only)
{
const struct v4l2_exportbuffer *p = arg;
pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
p->fd, prt_names(p->type, v4l2_type_names),
p->index, p->plane, p->flags);
}
static void v4l_print_create_buffers(const void *arg, bool write_only)
{
const struct v4l2_create_buffers *p = arg;
pr_cont("index=%d, count=%d, memory=%s, ",
p->index, p->count,
prt_names(p->memory, v4l2_memory_names));
v4l_print_format(&p->format, write_only);
}
static void v4l_print_streamparm(const void *arg, bool write_only)
{
const struct v4l2_streamparm *p = arg;
pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
const struct v4l2_captureparm *c = &p->parm.capture;
pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
c->capability, c->capturemode,
c->timeperframe.numerator, c->timeperframe.denominator,
c->extendedmode, c->readbuffers);
} else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
const struct v4l2_outputparm *c = &p->parm.output;
pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
c->capability, c->outputmode,
c->timeperframe.numerator, c->timeperframe.denominator,
c->extendedmode, c->writebuffers);
} else {
pr_cont("\n");
}
}
static void v4l_print_queryctrl(const void *arg, bool write_only)
{
const struct v4l2_queryctrl *p = arg;
pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
p->id, p->type, (int)sizeof(p->name), p->name,
p->minimum, p->maximum,
p->step, p->default_value, p->flags);
}
static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
{
const struct v4l2_query_ext_ctrl *p = arg;
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",
p->id, p->type, (int)sizeof(p->name), p->name,
p->minimum, p->maximum,
p->step, p->default_value, p->flags,
p->elem_size, p->elems, p->nr_of_dims,
p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
}
static void v4l_print_querymenu(const void *arg, bool write_only)
{
const struct v4l2_querymenu *p = arg;
pr_cont("id=0x%x, index=%d\n", p->id, p->index);
}
static void v4l_print_control(const void *arg, bool write_only)
{
const struct v4l2_control *p = arg;
pr_cont("id=0x%x, value=%d\n", p->id, p->value);
}
static void v4l_print_ext_controls(const void *arg, bool write_only)
{
const struct v4l2_ext_controls *p = arg;
int i;
pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
p->which, p->count, p->error_idx, p->request_fd);
for (i = 0; i < p->count; i++) {
if (!p->controls[i].size)
pr_cont(", id/val=0x%x/0x%x",
p->controls[i].id, p->controls[i].value);
else
pr_cont(", id/size=0x%x/%u",
p->controls[i].id, p->controls[i].size);
}
pr_cont("\n");
}
static void v4l_print_cropcap(const void *arg, bool write_only)
{
const struct v4l2_cropcap *p = arg;
pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
prt_names(p->type, v4l2_type_names),
p->bounds.width, p->bounds.height,
p->bounds.left, p->bounds.top,
p->defrect.width, p->defrect.height,
p->defrect.left, p->defrect.top,
p->pixelaspect.numerator, p->pixelaspect.denominator);
}
static void v4l_print_crop(const void *arg, bool write_only)
{
const struct v4l2_crop *p = arg;
pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
prt_names(p->type, v4l2_type_names),
p->c.width, p->c.height,
p->c.left, p->c.top);
}
static void v4l_print_selection(const void *arg, bool write_only)
{
const struct v4l2_selection *p = arg;
pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
prt_names(p->type, v4l2_type_names),
p->target, p->flags,
p->r.width, p->r.height, p->r.left, p->r.top);
}
static void v4l_print_jpegcompression(const void *arg, bool write_only)
{
const struct v4l2_jpegcompression *p = arg;
pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
p->quality, p->APPn, p->APP_len,
p->COM_len, p->jpeg_markers);
}
static void v4l_print_enc_idx(const void *arg, bool write_only)
{
const struct v4l2_enc_idx *p = arg;
pr_cont("entries=%d, entries_cap=%d\n",
p->entries, p->entries_cap);
}
static void v4l_print_encoder_cmd(const void *arg, bool write_only)
{
const struct v4l2_encoder_cmd *p = arg;
pr_cont("cmd=%d, flags=0x%x\n",
p->cmd, p->flags);
}
static void v4l_print_decoder_cmd(const void *arg, bool write_only)
{
const struct v4l2_decoder_cmd *p = arg;
pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
if (p->cmd == V4L2_DEC_CMD_START)
pr_info("speed=%d, format=%u\n",
p->start.speed, p->start.format);
else if (p->cmd == V4L2_DEC_CMD_STOP)
pr_info("pts=%llu\n", p->stop.pts);
}
static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
{
const struct v4l2_dbg_chip_info *p = arg;
pr_cont("type=%u, ", p->match.type);
if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
pr_cont("name=%.*s, ",
(int)sizeof(p->match.name), p->match.name);
else
pr_cont("addr=%u, ", p->match.addr);
pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
}
static void v4l_print_dbg_register(const void *arg, bool write_only)
{
const struct v4l2_dbg_register *p = arg;
pr_cont("type=%u, ", p->match.type);
if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
pr_cont("name=%.*s, ",
(int)sizeof(p->match.name), p->match.name);
else
pr_cont("addr=%u, ", p->match.addr);
pr_cont("reg=0x%llx, val=0x%llx\n",
p->reg, p->val);
}
static void v4l_print_dv_timings(const void *arg, bool write_only)
{
const struct v4l2_dv_timings *p = arg;
switch (p->type) {
case V4L2_DV_BT_656_1120:
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",
p->bt.interlaced, p->bt.pixelclock,
p->bt.width, p->bt.height,
p->bt.polarities, p->bt.hfrontporch,
p->bt.hsync, p->bt.hbackporch,
p->bt.vfrontporch, p->bt.vsync,
p->bt.vbackporch, p->bt.il_vfrontporch,
p->bt.il_vsync, p->bt.il_vbackporch,
p->bt.standards, p->bt.flags);
break;
default:
pr_cont("type=%d\n", p->type);
break;
}
}
static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
{
const struct v4l2_enum_dv_timings *p = arg;
pr_cont("index=%u, ", p->index);
v4l_print_dv_timings(&p->timings, write_only);
}
static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
{
const struct v4l2_dv_timings_cap *p = arg;
switch (p->type) {
case V4L2_DV_BT_656_1120:
pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
p->bt.min_width, p->bt.max_width,
p->bt.min_height, p->bt.max_height,
p->bt.min_pixelclock, p->bt.max_pixelclock,
p->bt.standards, p->bt.capabilities);
break;
default:
pr_cont("type=%u\n", p->type);
break;
}
}
static void v4l_print_frmsizeenum(const void *arg, bool write_only)
{
const struct v4l2_frmsizeenum *p = arg;
pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
p->index,
(p->pixel_format & 0xff),
(p->pixel_format >> 8) & 0xff,
(p->pixel_format >> 16) & 0xff,
(p->pixel_format >> 24) & 0xff,
p->type);
switch (p->type) {
case V4L2_FRMSIZE_TYPE_DISCRETE:
pr_cont(", wxh=%ux%u\n",
p->discrete.width, p->discrete.height);
break;
case V4L2_FRMSIZE_TYPE_STEPWISE:
pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
p->stepwise.min_width,
p->stepwise.min_height,
p->stepwise.max_width,
p->stepwise.max_height,
p->stepwise.step_width,
p->stepwise.step_height);
break;
case V4L2_FRMSIZE_TYPE_CONTINUOUS:
/* fall through */
default:
pr_cont("\n");
break;
}
}
static void v4l_print_frmivalenum(const void *arg, bool write_only)
{
const struct v4l2_frmivalenum *p = arg;
pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
p->index,
(p->pixel_format & 0xff),
(p->pixel_format >> 8) & 0xff,
(p->pixel_format >> 16) & 0xff,
(p->pixel_format >> 24) & 0xff,
p->width, p->height, p->type);
switch (p->type) {
case V4L2_FRMIVAL_TYPE_DISCRETE:
pr_cont(", fps=%d/%d\n",
p->discrete.numerator,
p->discrete.denominator);
break;
case V4L2_FRMIVAL_TYPE_STEPWISE:
pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
p->stepwise.min.numerator,
p->stepwise.min.denominator,
p->stepwise.max.numerator,
p->stepwise.max.denominator,
p->stepwise.step.numerator,
p->stepwise.step.denominator);
break;
case V4L2_FRMIVAL_TYPE_CONTINUOUS:
/* fall through */
default:
pr_cont("\n");
break;
}
}
static void v4l_print_event(const void *arg, bool write_only)
{
const struct v4l2_event *p = arg;
const struct v4l2_event_ctrl *c;
pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
p->type, p->pending, p->sequence, p->id,
p->timestamp.tv_sec, p->timestamp.tv_nsec);
switch (p->type) {
case V4L2_EVENT_VSYNC:
printk(KERN_DEBUG "field=%s\n",
prt_names(p->u.vsync.field, v4l2_field_names));
break;
case V4L2_EVENT_CTRL:
c = &p->u.ctrl;
printk(KERN_DEBUG "changes=0x%x, type=%u, ",
c->changes, c->type);
if (c->type == V4L2_CTRL_TYPE_INTEGER64)
pr_cont("value64=%lld, ", c->value64);
else
pr_cont("value=%d, ", c->value);
pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
c->flags, c->minimum, c->maximum,
c->step, c->default_value);
break;
case V4L2_EVENT_FRAME_SYNC:
pr_cont("frame_sequence=%u\n",
p->u.frame_sync.frame_sequence);
break;
}
}
static void v4l_print_event_subscription(const void *arg, bool write_only)
{
const struct v4l2_event_subscription *p = arg;
pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
p->type, p->id, p->flags);
}
static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
{
const struct v4l2_sliced_vbi_cap *p = arg;
int i;
pr_cont("type=%s, service_set=0x%08x\n",
prt_names(p->type, v4l2_type_names), p->service_set);
for (i = 0; i < 24; i++)
printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
p->service_lines[0][i],
p->service_lines[1][i]);
}
static void v4l_print_freq_band(const void *arg, bool write_only)
{
const struct v4l2_frequency_band *p = arg;
pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
p->tuner, p->type, p->index,
p->capability, p->rangelow,
p->rangehigh, p->modulation);
}
static void v4l_print_edid(const void *arg, bool write_only)
{
const struct v4l2_edid *p = arg;
pr_cont("pad=%u, start_block=%u, blocks=%u\n",
p->pad, p->start_block, p->blocks);
}
static void v4l_print_u32(const void *arg, bool write_only)
{
pr_cont("value=%u\n", *(const u32 *)arg);
}
static void v4l_print_newline(const void *arg, bool write_only)
{
pr_cont("\n");
}
static void v4l_print_default(const void *arg, bool write_only)
{
pr_cont("driver-specific ioctl\n");
}
static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
{
__u32 i;
/* zero the reserved fields */
c->reserved[0] = 0;
for (i = 0; i < c->count; i++)
c->controls[i].reserved2[0] = 0;
/* V4L2_CID_PRIVATE_BASE cannot be used as control class
when using extended controls.
Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
is it allowed for backwards compatibility.
*/
if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
return 0;
if (!c->which)
return 1;
/* Check that all controls are from the same control class. */
for (i = 0; i < c->count; i++) {
if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
c->error_idx = i;
return 0;
}
}
return 1;
}
static int check_fmt(struct file *file, enum v4l2_buf_type type)
{
struct video_device *vfd = video_devdata(file);
const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
if (ops == NULL)
return -EINVAL;
switch (type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if ((is_vid || is_tch) && is_rx &&
(ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (is_vid && is_tx &&
(ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
return 0;
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
return 0;
break;
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
return 0;
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
return 0;
break;
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
return 0;
break;
case V4L2_BUF_TYPE_SDR_CAPTURE:
if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
return 0;
break;
case V4L2_BUF_TYPE_SDR_OUTPUT:
if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
return 0;
break;
case V4L2_BUF_TYPE_META_CAPTURE:
if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap)
return 0;