[media] DocBook: document when to return ENODATA
ENODATA should be returned if the API used for getting, changing, querying
or enumerating the current video timings is not supported by the current input
or output.
This was decided during the 2012 Media Workshop.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml
index 44935a0..e185f14 100644
--- a/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml
@@ -78,6 +78,12 @@
<variablelist>
<varlistentry>
+ <term><errorcode>ENODATA</errorcode></term>
+ <listitem>
+ <para>Digital video timings are not supported for this input or output.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
<term><errorcode>ENOLINK</errorcode></term>
<listitem>
<para>No timings could be detected because no signal was found.