[media] bt819: fix querystd
Return V4L2_STD_UNKNOWN if no signal is detected.
Otherwise AND the standard mask with the detected standards.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/i2c/bt819.c b/drivers/media/i2c/bt819.c
index ae1eac0..369cf6f 100644
--- a/drivers/media/i2c/bt819.c
+++ b/drivers/media/i2c/bt819.c
@@ -215,15 +215,17 @@
struct bt819 *decoder = to_bt819(sd);
int status = bt819_read(decoder, 0x00);
int res = V4L2_IN_ST_NO_SIGNAL;
- v4l2_std_id std;
+ v4l2_std_id std = pstd ? *pstd : V4L2_STD_ALL;
if ((status & 0x80))
res = 0;
+ else
+ std = V4L2_STD_UNKNOWN;
if ((status & 0x10))
- std = V4L2_STD_PAL;
+ std &= V4L2_STD_PAL;
else
- std = V4L2_STD_NTSC;
+ std &= V4L2_STD_NTSC;
if (pstd)
*pstd = std;
if (pstatus)