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authorJonathan Corbet <corbet@lwn.net>2010-09-24 14:17:29 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-10-21 01:17:05 -0200
commite99dfcf7f68d8dffccfa795d1548790cee2d7395 (patch)
tree8402127de2243502f9d4a2270af7307568832a32 /drivers/media/video/ov7670.c
parentdf2b9b0f9c02689ce3b3f0b5dbc6c9b272bbe1ab (diff)
[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.c21
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 = {