![Mauro Carvalho Chehab](/assets/img/avatar_default.png)
The V4L and DVB API's are there for a long time. however, up to now, no efforts were done to merge them to kernel DocBook. This patch adds the current versions of the specs as an unique compendium. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
59 lines
1.5 KiB
XML
59 lines
1.5 KiB
XML
<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:
|
|
-->
|