diff options
Diffstat (limited to 'drivers/media/video/cx25840/cx25840-core.c')
| -rw-r--r-- | drivers/media/video/cx25840/cx25840-core.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c index ad299668c37..05247d4c340 100644 --- a/drivers/media/video/cx25840/cx25840-core.c +++ b/drivers/media/video/cx25840/cx25840-core.c @@ -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 = { |