From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
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@xxxxxxxxx>
Cc: Scott Jiang <scott.jiang.linux@xxxxxxxxx>
---
drivers/media/i2c/adv7183.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/media/i2c/adv7183.c b/drivers/media/i2c/adv7183.c
index 7c48e22..b5e51d8 100644
--- a/drivers/media/i2c/adv7183.c
+++ b/drivers/media/i2c/adv7183.c
@@ -375,28 +375,28 @@ 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;
--
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
