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[media] cx25840: Add support for g_input_status 

Allow bridge drivers to query status.

Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Steven Toth 2012-01-06 11:54:05 -03:00 committed by Mauro Carvalho Chehab
parent 0963119fca
commit a21df45df0
1 changed files with 16 additions and 0 deletions
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16
drivers/media/video/cx25840/cx25840-core.c
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@ -1741,6 +1741,21 @@ static int cx25840_g_std(struct v4l2_subdev *sd, v4l2_std_id *std)
return 0;
}
static int cx25840_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
/* A limited function that checks for signal status and returns
* the state.
*/
/* Check for status of Horizontal lock (SRC lock isn't reliable) */
if ((cx25840_read4(client, 0x40c) & 0x00010000) == 0)
*status |= V4L2_IN_ST_NO_SIGNAL;
return 0;
}
static int cx25840_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct cx25840_state *state = to_state(sd);
@ -5037,6 +5052,7 @@ static const struct v4l2_subdev_video_ops cx25840_video_ops = {
.s_routing = cx25840_s_video_routing,
.s_mbus_fmt = cx25840_s_mbus_fmt,
.s_stream = cx25840_s_stream,
.g_input_status = cx25840_g_input_status,
};
static const struct v4l2_subdev_vbi_ops cx25840_vbi_ops = {