diff options
| author | Jonathan Corbet <corbet@lwn.net> | 2010-09-24 21:17:29 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-10-21 07:17:05 +0400 |
| commit | e99dfcf7f68d8dffccfa795d1548790cee2d7395 (patch) | |
| tree | 8402127de2243502f9d4a2270af7307568832a32 /drivers/media/video/ov7670.c | |
| parent | df2b9b0f9c02689ce3b3f0b5dbc6c9b272bbe1ab (diff) | |
| download | linux-e99dfcf7f68d8dffccfa795d1548790cee2d7395.tar.xz | |
[media] ov7670: implement VIDIOC_ENUM_FRAMEINTERVALS
Inquiring minds (and gstreamer) want to know.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/ov7670.c')
| -rw-r--r-- | drivers/media/video/ov7670.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/media/video/ov7670.c b/drivers/media/video/ov7670.c index 089013ec987a..ffccac5c2d75 100644 --- a/drivers/media/video/ov7670.c +++ b/drivers/media/video/ov7670.c @@ -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 = { |