提交 e99dfcf7 编写于 作者: J Jonathan Corbet 提交者: Mauro Carvalho Chehab

[media] ov7670: implement VIDIOC_ENUM_FRAMEINTERVALS

Inquiring minds (and gstreamer) want to know.
Signed-off-by: NJonathan Corbet <corbet@lwn.net>
Signed-off-by: NDaniel Drake <dsd@laptop.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
上级 df2b9b0f
......@@ -887,14 +887,28 @@ static int ov7670_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
}
/*
* Code for dealing with controls.
* Frame intervals. Since frame rates are controlled with the clock
* divider, we can only do 30/n for integer n values. So no continuous
* or stepwise options. Here we just pick a handful of logical values.
*/
static int ov7670_frame_rates[] = { 30, 15, 10, 5, 1 };
static int ov7670_enum_frameintervals(struct v4l2_subdev *sd,
struct v4l2_frmivalenum *interval)
{
if (interval->index >= ARRAY_SIZE(ov7670_frame_rates))
return -EINVAL;
interval->type = V4L2_FRMIVAL_TYPE_DISCRETE;
interval->discrete.numerator = 1;
interval->discrete.denominator = ov7670_frame_rates[interval->index];
return 0;
}
/*
* Code for dealing with controls.
*/
static int ov7670_store_cmatrix(struct v4l2_subdev *sd,
int matrix[CMATRIX_LEN])
......@@ -1438,6 +1452,7 @@ static const struct v4l2_subdev_video_ops ov7670_video_ops = {
.s_mbus_fmt = ov7670_s_mbus_fmt,
.s_parm = ov7670_s_parm,
.g_parm = ov7670_g_parm,
.enum_frameintervals = ov7670_enum_frameintervals,
};
static const struct v4l2_subdev_ops ov7670_ops = {
......
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