From e99dfcf7f68d8dffccfa795d1548790cee2d7395 Mon Sep 17 00:00:00 2001 From: Jonathan Corbet Date: Fri, 24 Sep 2010 14:17:29 -0300 Subject: [PATCH] [media] ov7670: implement VIDIOC_ENUM_FRAMEINTERVALS Inquiring minds (and gstreamer) want to know. Signed-off-by: Jonathan Corbet Signed-off-by: Daniel Drake Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/ov7670.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 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 @@ -887,15 +887,29 @@ static int ov7670_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms) } +/* + * 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 = {