[media] saa7115: fix querystd

Return V4L2_STD_UNKNOWN if no signal is detected.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/i2c/saa7115.c b/drivers/media/i2c/saa7115.c
index 90c43f3fb0f1a9d6bffaa4d288c90617cb4a7b38..7fd766ec64c8d5059f01e593dd52c6479ccc21dd 100644 (file)
--- a/drivers/media/i2c/saa7115.c
+++ b/drivers/media/i2c/saa7115.c
@@ -1428,6 +1428,7 @@ static int saa711x_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
                        *std &= V4L2_STD_SECAM;
                        break;
                default:
+                       *std = V4L2_STD_UNKNOWN;
                        /* Can't detect anything */
                        break;
                }
@@ -1436,8 +1437,10 @@ static int saa711x_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
        v4l2_dbg(1, debug, sd, "Status byte 2 (0x1f)=0x%02x\n", reg1f);
 
        /* horizontal/vertical not locked */
-       if (reg1f & 0x40)
+       if (reg1f & 0x40) {
+               *std = V4L2_STD_UNKNOWN;
                goto ret;
+       }
 
        if (reg1f & 0x20)
                *std &= V4L2_STD_525_60;