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[media] saa7110: 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>
This commit is contained in:
Hans Verkuil 2013-05-29 10:18:57 -03:00 committed by Mauro Carvalho Chehab
parent e83c30c723
commit 416e87a41d
1 changed files with 2 additions and 2 deletions
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4
drivers/media/i2c/saa7110.c
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@ -202,7 +202,7 @@ static v4l2_std_id determine_norm(struct v4l2_subdev *sd)
status = saa7110_read(sd);
if (status & 0x40) {
v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
return decoder->norm; /* no change*/
return V4L2_STD_UNKNOWN;
}
if ((status & 3) == 0) {
saa7110_write(sd, 0x06, 0x83);
@ -264,7 +264,7 @@ static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
{
*(v4l2_std_id *)std = determine_norm(sd);
*std &= determine_norm(sd);
return 0;
}