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[media] v4l2: integrate support for VIDIOC_QUERY_EXT_CTRL

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Add the v4l2 core plumbing for the new VIDIOC_QUERY_EXT_CTRL ioctl.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Hans Verkuil 2014-06-10 04:22:06 -03:00 committed by Mauro Carvalho Chehab
parent d9a2547150
commit e6bee3685e
4 changed files with 40 additions and 0 deletions
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2
drivers/media/v4l2-core/v4l2-dev.c
View File

@ -575,6 +575,8 @@ static void determine_valid_ioctls(struct video_device *vdev)
be valid if the filehandle passed the control handler. */
if (vdev->ctrl_handler || ops->vidioc_queryctrl)
set_bit(_IOC_NR(VIDIOC_QUERYCTRL), valid_ioctls);
if (vdev->ctrl_handler || ops->vidioc_query_ext_ctrl)
set_bit(_IOC_NR(VIDIOC_QUERY_EXT_CTRL), valid_ioctls);
if (vdev->ctrl_handler || ops->vidioc_g_ctrl || ops->vidioc_g_ext_ctrls)
set_bit(_IOC_NR(VIDIOC_G_CTRL), valid_ioctls);
if (vdev->ctrl_handler || ops->vidioc_s_ctrl || ops->vidioc_s_ext_ctrls)

33
drivers/media/v4l2-core/v4l2-ioctl.c
View File

@ -525,6 +525,21 @@ static void v4l_print_queryctrl(const void *arg, bool write_only)
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,%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],
p->dims[4], p->dims[5], p->dims[6], p->dims[7]);
}
static void v4l_print_querymenu(const void *arg, bool write_only)
{
const struct v4l2_querymenu *p = arg;
@ -1561,6 +1576,23 @@ static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
return -ENOTTY;
}
static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_query_ext_ctrl *p = arg;
struct v4l2_fh *vfh =
test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
if (vfh && vfh->ctrl_handler)
return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
if (vfd->ctrl_handler)
return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
if (ops->vidioc_query_ext_ctrl)
return ops->vidioc_query_ext_ctrl(file, fh, p);
return -ENOTTY;
}
static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
@ -2121,6 +2153,7 @@ static struct v4l2_ioctl_info v4l2_ioctls[] = {
IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
IOCTL_INFO_FNC(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
};
#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)

3
drivers/media/v4l2-core/v4l2-subdev.c
View File

@ -139,6 +139,9 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
case VIDIOC_QUERYCTRL:
return v4l2_queryctrl(vfh->ctrl_handler, arg);
case VIDIOC_QUERY_EXT_CTRL:
return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);
case VIDIOC_QUERYMENU:
return v4l2_querymenu(vfh->ctrl_handler, arg);

2
include/media/v4l2-ioctl.h
View File

@ -158,6 +158,8 @@ struct v4l2_ioctl_ops {
/* Control handling */
int (*vidioc_queryctrl) (struct file *file, void *fh,
struct v4l2_queryctrl *a);
int (*vidioc_query_ext_ctrl) (struct file *file, void *fh,
struct v4l2_query_ext_ctrl *a);
int (*vidioc_g_ctrl) (struct file *file, void *fh,
struct v4l2_control *a);
int (*vidioc_s_ctrl) (struct file *file, void *fh,