[media] saa7191: 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>
diff --git a/drivers/media/i2c/saa7191.c b/drivers/media/i2c/saa7191.c
index 08dcaec..606a4ba 100644
--- a/drivers/media/i2c/saa7191.c
+++ b/drivers/media/i2c/saa7191.c
@@ -271,7 +271,7 @@
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);
@@ -302,7 +302,7 @@
if (status & SAA7191_STATUS_FIDT) {
/* 60Hz signal -> NTSC */
dprintk("60Hz signal: NTSC\n");
- *norm = V4L2_STD_NTSC;
+ *norm &= V4L2_STD_NTSC;
return 0;
}
@@ -324,12 +324,13 @@
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);
}
@@ -349,18 +350,19 @@
/* 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);