1 files changed, 58 insertions, 0 deletions
diff --git a/Documentation/DocBook/v4l/vidioc-log-status.xml b/Documentation/DocBook/v4l/vidioc-log-status.xml
new file mode 100644
index 00000000000..2634b7c88b5
--- /dev/null
+++ b/Documentation/DocBook/v4l/vidioc-log-status.xml
@@ -0,0 +1,58 @@
+<refentry id="vidioc-log-status">
+  <refmeta>
+    <refentrytitle>ioctl VIDIOC_LOG_STATUS</refentrytitle>
+    &manvol;
+  </refmeta>
+
+  <refnamediv>
+    <refname>VIDIOC_LOG_STATUS</refname>
+    <refpurpose>Log driver status information</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <funcsynopsis>
+      <funcprototype>
+	<funcdef>int <function>ioctl</function></funcdef>
+	<paramdef>int <parameter>fd</parameter></paramdef>
+	<paramdef>int <parameter>request</parameter></paramdef>
+      </funcprototype>
+    </funcsynopsis>
+  </refsynopsisdiv>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para>As the video/audio devices become more complicated it
+becomes harder to debug problems. When this ioctl is called the driver
+will output the current device status to the kernel log. This is
+particular useful when dealing with problems like no sound, no video
+and incorrectly tuned channels. Also many modern devices autodetect
+video and audio standards and this ioctl will report what the device
+thinks what the standard is. Mismatches may give an indication where
+the problem is.</para>
+
+    <para>This ioctl is optional and not all drivers support it. It
+was introduced in Linux 2.6.15.</para>
+  </refsect1>
+
+  <refsect1>
+    &return-value;
+
+    <variablelist>
+      <varlistentry>
+	<term><errorcode>EINVAL</errorcode></term>
+	<listitem>
+	  <para>The driver does not support this ioctl.</para>
+	</listitem>
+      </varlistentry>
+    </variablelist>
+  </refsect1>
+</refentry>
+
+<!--
+Local Variables:
+mode: sgml
+sgml-parent-document: "v4l2.sgml"
+indent-tabs-mode: nil
+End:
+-->