[media] v4l2-ioctl: clarify querystd comment
Improve the querystd comment.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 67745438..19e2988 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1385,10 +1385,10 @@
v4l2_std_id *p = arg;
/*
- * If nothing detected, it should return all supported
- * standard.
- * Drivers just need to mask the std argument, in order
- * to remove the standards that don't apply from the mask.
+ * If no signal is detected, then the driver should return
+ * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
+ * any standards that do not apply removed.
+ *
* This means that tuners, audio and video decoders can join
* their efforts to improve the standards detection.
*/