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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-17 11:17:44 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-17 11:17:44 -0300 |
| commit | ee117cb21fc99d6d1ef141b62ac07c2c99ed6558 (patch) | |
| tree | b3109826151f5b2cacd01a2a78fc51079381fec7 /linux/Documentation/DocBook/v4l/vidioc-log-status.xml | |
| parent | 3c34c6c8fa0c2f378cdad415e8f15c0938c28cb8 (diff) | |
| parent | 26642526dd562aa77049bb56d5bf9ad64158c767 (diff) | |
| download | mediapointer-dvb-s2-ee117cb21fc99d6d1ef141b62ac07c2c99ed6558.tar.gz mediapointer-dvb-s2-ee117cb21fc99d6d1ef141b62ac07c2c99ed6558.tar.bz2 | |
merge: http://kernellabs.com/hg/~mkrufky/saa7164
From: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'linux/Documentation/DocBook/v4l/vidioc-log-status.xml')
| -rw-r--r-- | linux/Documentation/DocBook/v4l/vidioc-log-status.xml | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/linux/Documentation/DocBook/v4l/vidioc-log-status.xml b/linux/Documentation/DocBook/v4l/vidioc-log-status.xml new file mode 100644 index 000000000..2634b7c88 --- /dev/null +++ b/linux/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: +--> |