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Date: Fri, 08 May 2015 12:55:01 +0200
From: Hans Verkuil <hverkuil@xs4all.nl>
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To: Linux Media Mailing List <linux-media@vger.kernel.org>
Subject: [PATCH] DocBook/media: improve timestamp documentation
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Sender: linux-media-owner@vger.kernel.org
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Explain which clock was used to make the timestamp.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 Documentation/DocBook/media/v4l/vidioc-dqevent.xml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/DocBook/media/v4l/vidioc-dqevent.xml b/Documentation/DocBook/media/v4l/vidioc-dqevent.xml
index 50ccd33..c9c3c77 100644
--- a/Documentation/DocBook/media/v4l/vidioc-dqevent.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-dqevent.xml
@@ -133,7 +133,10 @@
 	    <entry>struct timespec</entry>
 	    <entry><structfield>timestamp</structfield></entry>
             <entry></entry>
-	    <entry>Event timestamp.</entry>
+	    <entry>Event timestamp. The timestamp has been taken from the
+	    <constant>CLOCK_MONOTONIC</constant> clock. To access the
+	    same clock outside V4L2, use <function>clock_gettime(2)</function>.
+	    </entry>
 	  </row>
 	  <row>
 	    <entry>u32</entry>
-- 
2.1.4