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[media] ks0127: 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 10:18:56 -03:00 committed by Mauro Carvalho Chehab
parent ddc7f72a3d
commit e83c30c723
1 changed files with 12 additions and 5 deletions
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15
drivers/media/i2c/ks0127.c
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@ -609,17 +609,24 @@ static int ks0127_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd
{ {
int stat = V4L2_IN_ST_NO_SIGNAL; int stat = V4L2_IN_ST_NO_SIGNAL;
u8 status; u8 status;
v4l2_std_id std = V4L2_STD_ALL; v4l2_std_id std = pstd ? *pstd : V4L2_STD_ALL;
status = ks0127_read(sd, KS_STAT); status = ks0127_read(sd, KS_STAT);
if (!(status & 0x20)) /* NOVID not set */ if (!(status & 0x20)) /* NOVID not set */
stat = 0; stat = 0;
if (!(status & 0x01)) /* CLOCK set */ if (!(status & 0x01)) { /* CLOCK set */
stat |= V4L2_IN_ST_NO_COLOR; stat |= V4L2_IN_ST_NO_COLOR;
std = V4L2_STD_UNKNOWN;
} else {
if ((status & 0x08)) /* PALDET set */ if ((status & 0x08)) /* PALDET set */
std = V4L2_STD_PAL; std &= V4L2_STD_PAL;
else else
std = V4L2_STD_NTSC; std &= V4L2_STD_NTSC;
}
if ((status & 0x10)) /* PALDET set */
std &= V4L2_STD_525_60;
else
std &= V4L2_STD_625_50;
if (pstd) if (pstd)
*pstd = std; *pstd = std;
if (pstatus) if (pstatus)