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Diffstat (limited to 'Documentation/DocBook/v4l/media-ioc-setup-link.xml')
-rw-r--r-- | Documentation/DocBook/v4l/media-ioc-setup-link.xml | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/Documentation/DocBook/v4l/media-ioc-setup-link.xml b/Documentation/DocBook/v4l/media-ioc-setup-link.xml deleted file mode 100644 index cec97af4dab4..000000000000 --- a/Documentation/DocBook/v4l/media-ioc-setup-link.xml +++ /dev/null @@ -1,93 +0,0 @@ -<refentry id="media-ioc-setup-link"> - <refmeta> - <refentrytitle>ioctl MEDIA_IOC_SETUP_LINK</refentrytitle> - &manvol; - </refmeta> - - <refnamediv> - <refname>MEDIA_IOC_SETUP_LINK</refname> - <refpurpose>Modify the properties of a link</refpurpose> - </refnamediv> - - <refsynopsisdiv> - <funcsynopsis> - <funcprototype> - <funcdef>int <function>ioctl</function></funcdef> - <paramdef>int <parameter>fd</parameter></paramdef> - <paramdef>int <parameter>request</parameter></paramdef> - <paramdef>struct media_link_desc *<parameter>argp</parameter></paramdef> - </funcprototype> - </funcsynopsis> - </refsynopsisdiv> - - <refsect1> - <title>Arguments</title> - - <variablelist> - <varlistentry> - <term><parameter>fd</parameter></term> - <listitem> - <para>File descriptor returned by - <link linkend='media-func-open'><function>open()</function></link>.</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>request</parameter></term> - <listitem> - <para>MEDIA_IOC_SETUP_LINK</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>argp</parameter></term> - <listitem> - <para></para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> - - <refsect1> - <title>Description</title> - - <para>To change link properties applications fill a &media-link-desc; with - link identification information (source and sink pad) and the new requested - link flags. They then call the MEDIA_IOC_SETUP_LINK ioctl with a pointer to - that structure.</para> - <para>The only configurable property is the <constant>ENABLED</constant> - link flag to enable/disable a link. Links marked with the - <constant>IMMUTABLE</constant> link flag can not be enabled or disabled. - </para> - <para>Link configuration has no side effect on other links. If an enabled - link at the sink pad prevents the link from being enabled, the driver - returns with an &EBUSY;.</para> - <para>Only links marked with the <constant>DYNAMIC</constant> link flag can - be enabled/disabled while streaming media data. Attempting to enable or - disable a streaming non-dynamic link will return an &EBUSY;.</para> - <para>If the specified link can't be found the driver returns with an - &EINVAL;.</para> - </refsect1> - - <refsect1> - &return-value; - - <variablelist> - <varlistentry> - <term><errorcode>EBUSY</errorcode></term> - <listitem> - <para>The link properties can't be changed because the link is - currently busy. This can be caused, for instance, by an active media - stream (audio or video) on the link. The ioctl shouldn't be retried if - no other action is performed before to fix the problem.</para> - </listitem> - </varlistentry> - <varlistentry> - <term><errorcode>EINVAL</errorcode></term> - <listitem> - <para>The &media-link-desc; references a non-existing link, or the - link is immutable and an attempt to modify its configuration was made. - </para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> -</refentry> |