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Diffstat (limited to 'kernel/Documentation/DocBook/media/v4l/vidioc-log-status.xml')
| -rw-r--r-- | kernel/Documentation/DocBook/media/v4l/vidioc-log-status.xml | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/kernel/Documentation/DocBook/media/v4l/vidioc-log-status.xml b/kernel/Documentation/DocBook/media/v4l/vidioc-log-status.xml new file mode 100644 index 000000000..5ded7d35e --- /dev/null +++ b/kernel/Documentation/DocBook/media/v4l/vidioc-log-status.xml @@ -0,0 +1,41 @@ +<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; + </refsect1> +</refentry> |