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[media] adv7183: fix querystd 

If no signal is detected, return V4L2_STD_UNKNOWN. Otherwise AND the standard
with the detected standards.
Note that the v4l2 core initializes the std with tvnorms before calling the
querystd ioctl.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Scott Jiang <scott.jiang.linux@gmail.com>
Acked-by: Scott Jiang <scott.jiang.linux@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2013-05-29 10:18:54 -03:00 committed by Mauro Carvalho Chehab
parent ca37157506
commit 7dd8fbbe50
1 changed files with 8 additions and 8 deletions
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16
drivers/media/i2c/adv7183.c
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@ -374,28 +374,28 @@ static int adv7183_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
reg = adv7183_read(sd, ADV7183_STATUS_1);
switch ((reg >> 0x4) & 0x7) {
case 0:
*std = V4L2_STD_NTSC;
*std &= V4L2_STD_NTSC;
break;
case 1:
*std = V4L2_STD_NTSC_443;
*std &= V4L2_STD_NTSC_443;
break;
case 2:
*std = V4L2_STD_PAL_M;
*std &= V4L2_STD_PAL_M;
break;
case 3:
*std = V4L2_STD_PAL_60;
*std &= V4L2_STD_PAL_60;
break;
case 4:
*std = V4L2_STD_PAL;
*std &= V4L2_STD_PAL;
break;
case 5:
*std = V4L2_STD_SECAM;
*std &= V4L2_STD_SECAM;
break;
case 6:
*std = V4L2_STD_PAL_Nc;
*std &= V4L2_STD_PAL_Nc;
break;
case 7:
*std = V4L2_STD_SECAM;
*std &= V4L2_STD_SECAM;
break;
default:
*std = V4L2_STD_UNKNOWN;