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[media] vpx3220: fix querystd

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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 10:19:01 -03:00 committed by Mauro Carvalho Chehab
parent 55852cbbae
commit 32cb3b09f4
1 changed files with 6 additions and 4 deletions
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10
drivers/media/i2c/vpx3220.c
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@ -295,7 +295,7 @@ static int vpx3220_init(struct v4l2_subdev *sd, u32 val)
static int vpx3220_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
{
int res = V4L2_IN_ST_NO_SIGNAL, status;
v4l2_std_id std = 0;
v4l2_std_id std = pstd ? *pstd : V4L2_STD_ALL;
status = vpx3220_fp_read(sd, 0x0f3);
@ -312,19 +312,21 @@ static int vpx3220_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pst
case 0x10:
case 0x14:
case 0x18:
std = V4L2_STD_PAL;
std &= V4L2_STD_PAL;
break;
case 0x08:
std = V4L2_STD_SECAM;
std &= V4L2_STD_SECAM;
break;
case 0x04:
case 0x0c:
case 0x1c:
std = V4L2_STD_NTSC;
std &= V4L2_STD_NTSC;
break;
}
} else {
std = V4L2_STD_UNKNOWN;
}
if (pstd)
*pstd = std;