From: Hans Verkuil <hans.verkuil@xxxxxxxxx> Explicitly mention that this ioctl should return V4L2_STD_UNKNOWN if not signal was detected. Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx> --- Documentation/DocBook/media/v4l/vidioc-querystd.xml | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Documentation/DocBook/media/v4l/vidioc-querystd.xml b/Documentation/DocBook/media/v4l/vidioc-querystd.xml index fe80a18..2223485 100644 --- a/Documentation/DocBook/media/v4l/vidioc-querystd.xml +++ b/Documentation/DocBook/media/v4l/vidioc-querystd.xml @@ -54,7 +54,8 @@ standard automatically. To do so, applications call <constant> VIDIOC_QUERYSTD</constant> with a pointer to a &v4l2-std-id; type. The driver stores here a set of candidates, this can be a single flag or a set of supported standards if for example the hardware can only -distinguish between 50 and 60 Hz systems. When detection is not +distinguish between 50 and 60 Hz systems. If no signal was detected, +then the driver will return V4L2_STD_UNKNOWN. When detection is not possible or fails, the set must contain all standards supported by the current video input or output.</para> -- 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
