From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
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@xxxxxxxxx>
---
drivers/media/i2c/saa7191.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/drivers/media/i2c/saa7191.c b/drivers/media/i2c/saa7191.c
index 84f7899..9d8ea2a 100644
--- a/drivers/media/i2c/saa7191.c
+++ b/drivers/media/i2c/saa7191.c
@@ -272,7 +272,7 @@ static int saa7191_querystd(struct v4l2_subdev *sd, v4l2_std_id *norm)
dprintk("SAA7191 extended signal auto-detection...\n");
- *norm = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM;
+ *norm &= V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM;
stdc &= ~SAA7191_STDC_SECS;
ctl3 &= ~(SAA7191_CTL3_FSEL);
@@ -303,7 +303,7 @@ static int saa7191_querystd(struct v4l2_subdev *sd, v4l2_std_id *norm)
if (status & SAA7191_STATUS_FIDT) {
/* 60Hz signal -> NTSC */
dprintk("60Hz signal: NTSC\n");
- *norm = V4L2_STD_NTSC;
+ *norm &= V4L2_STD_NTSC;
return 0;
}
@@ -325,12 +325,13 @@ static int saa7191_querystd(struct v4l2_subdev *sd, v4l2_std_id *norm)
if (status & SAA7191_STATUS_FIDT) {
dprintk("No 50Hz signal\n");
saa7191_s_std(sd, old_norm);
- return -EAGAIN;
+ *norm = V4L2_STD_UNKNOWN;
+ return 0;
}
if (status & SAA7191_STATUS_CODE) {
dprintk("PAL\n");
- *norm = V4L2_STD_PAL;
+ *norm &= V4L2_STD_PAL;
return saa7191_s_std(sd, old_norm);
}
@@ -350,18 +351,19 @@ static int saa7191_querystd(struct v4l2_subdev *sd, v4l2_std_id *norm)
/* not 50Hz ? */
if (status & SAA7191_STATUS_FIDT) {
dprintk("No 50Hz signal\n");
- err = -EAGAIN;
+ *norm = V4L2_STD_UNKNOWN;
goto out;
}
if (status & SAA7191_STATUS_CODE) {
/* Color detected -> SECAM */
dprintk("SECAM\n");
- *norm = V4L2_STD_SECAM;
+ *norm &= V4L2_STD_SECAM;
return saa7191_s_std(sd, old_norm);
}
dprintk("No color detected with SECAM - Going back to PAL.\n");
+ *norm = V4L2_STD_UNKNOWN;
out:
return saa7191_s_std(sd, old_norm);
--
1.7.10.4
--
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