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Diffstat (limited to 'Documentation/DocBook/media/v4l/media-ioc-g-topology.xml')
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diff --git a/Documentation/DocBook/media/v4l/media-ioc-g-topology.xml b/Documentation/DocBook/media/v4l/media-ioc-g-topology.xml deleted file mode 100644 index e0d49fa329f0..000000000000 --- a/Documentation/DocBook/media/v4l/media-ioc-g-topology.xml +++ /dev/null @@ -1,391 +0,0 @@ -<refentry id="media-g-topology"> - <refmeta> - <refentrytitle>ioctl MEDIA_IOC_G_TOPOLOGY</refentrytitle> - &manvol; - </refmeta> - - <refnamediv> - <refname>MEDIA_IOC_G_TOPOLOGY</refname> - <refpurpose>Enumerate the graph topology and graph element properties</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_v2_topology *<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_G_TOPOLOGY</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>argp</parameter></term> - <listitem> - <para></para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> - - <refsect1> - <title>Description</title> - <para>The typical usage of this ioctl is to call it twice. - On the first call, the structure defined at &media-v2-topology; should - be zeroed. At return, if no errors happen, this ioctl will return the - <constant>topology_version</constant> and the total number of entities, - interfaces, pads and links.</para> - <para>Before the second call, the userspace should allocate arrays to - store the graph elements that are desired, putting the pointers to them - at the ptr_entities, ptr_interfaces, ptr_links and/or ptr_pads, keeping - the other values untouched.</para> - <para>If the <constant>topology_version</constant> remains the same, the - ioctl should fill the desired arrays with the media graph elements.</para> - - <table pgwide="1" frame="none" id="media-v2-topology"> - <title>struct <structname>media_v2_topology</structname></title> - <tgroup cols="5"> - <colspec colname="c1" /> - <colspec colname="c2" /> - <colspec colname="c3" /> - <colspec colname="c4" /> - <colspec colname="c5" /> - <tbody valign="top"> - <row> - <entry>__u64</entry> - <entry><structfield>topology_version</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Version of the media graph topology. When the graph is - created, this field starts with zero. Every time a graph - element is added or removed, this field is - incremented.</entry> - </row> - <row> - <entry>__u64</entry> - <entry><structfield>num_entities</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Number of entities in the graph</entry> - </row> - <row> - <entry>__u64</entry> - <entry><structfield>ptr_entities</structfield></entry> - <entry></entry> - <entry></entry> - <entry>A pointer to a memory area where the entities array - will be stored, converted to a 64-bits integer. - It can be zero. if zero, the ioctl won't store the - entities. It will just update - <constant>num_entities</constant></entry> - </row> - <row> - <entry>__u64</entry> - <entry><structfield>num_interfaces</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Number of interfaces in the graph</entry> - </row> - <row> - <entry>__u64</entry> - <entry><structfield>ptr_interfaces</structfield></entry> - <entry></entry> - <entry></entry> - <entry>A pointer to a memory area where the interfaces array - will be stored, converted to a 64-bits integer. - It can be zero. if zero, the ioctl won't store the - interfaces. It will just update - <constant>num_interfaces</constant></entry> - </row> - <row> - <entry>__u64</entry> - <entry><structfield>num_pads</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Total number of pads in the graph</entry> - </row> - <row> - <entry>__u64</entry> - <entry><structfield>ptr_pads</structfield></entry> - <entry></entry> - <entry></entry> - <entry>A pointer to a memory area where the pads array - will be stored, converted to a 64-bits integer. - It can be zero. if zero, the ioctl won't store the - pads. It will just update - <constant>num_pads</constant></entry> - </row> - <row> - <entry>__u64</entry> - <entry><structfield>num_links</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Total number of data and interface links in the graph</entry> - </row> - <row> - <entry>__u64</entry> - <entry><structfield>ptr_links</structfield></entry> - <entry></entry> - <entry></entry> - <entry>A pointer to a memory area where the links array - will be stored, converted to a 64-bits integer. - It can be zero. if zero, the ioctl won't store the - links. It will just update - <constant>num_links</constant></entry> - </row> - </tbody> - </tgroup> - </table> - - <table pgwide="1" frame="none" id="media-v2-entity"> - <title>struct <structname>media_v2_entity</structname></title> - <tgroup cols="5"> - <colspec colname="c1" /> - <colspec colname="c2" /> - <colspec colname="c3" /> - <colspec colname="c4" /> - <colspec colname="c5" /> - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>id</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Unique ID for the entity.</entry> - </row> - <row> - <entry>char</entry> - <entry><structfield>name</structfield>[64]</entry> - <entry></entry> - <entry></entry> - <entry>Entity name as an UTF-8 NULL-terminated string.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>function</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Entity main function, see <xref linkend="media-entity-type" /> for details.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>reserved</structfield>[12]</entry> - <entry>Reserved for future extensions. Drivers and applications must - set this array to zero.</entry> - </row> - </tbody> - </tgroup> - </table> - - <table pgwide="1" frame="none" id="media-v2-interface"> - <title>struct <structname>media_v2_interface</structname></title> - <tgroup cols="5"> - <colspec colname="c1" /> - <colspec colname="c2" /> - <colspec colname="c3" /> - <colspec colname="c4" /> - <colspec colname="c5" /> - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>id</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Unique ID for the interface.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>intf_type</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Interface type, see <xref linkend="media-intf-type" /> for details.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>flags</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Interface flags. Currently unused.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>reserved</structfield>[9]</entry> - <entry></entry> - <entry></entry> - <entry>Reserved for future extensions. Drivers and applications must - set this array to zero.</entry> - </row> - <row> - <entry>struct media_v2_intf_devnode</entry> - <entry><structfield>devnode</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Used only for device node interfaces. See <xref linkend="media-v2-intf-devnode" /> for details..</entry> - </row> - </tbody> - </tgroup> - </table> - - <table pgwide="1" frame="none" id="media-v2-intf-devnode"> - <title>struct <structname>media_v2_interface</structname></title> - <tgroup cols="5"> - <colspec colname="c1" /> - <colspec colname="c2" /> - <colspec colname="c3" /> - <colspec colname="c4" /> - <colspec colname="c5" /> - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>major</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Device node major number.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>minor</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Device node minor number.</entry> - </row> - </tbody> - </tgroup> - </table> - - <table pgwide="1" frame="none" id="media-v2-pad"> - <title>struct <structname>media_v2_pad</structname></title> - <tgroup cols="5"> - <colspec colname="c1" /> - <colspec colname="c2" /> - <colspec colname="c3" /> - <colspec colname="c4" /> - <colspec colname="c5" /> - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>id</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Unique ID for the pad.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>entity_id</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Unique ID for the entity where this pad belongs.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>flags</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Pad flags, see <xref linkend="media-pad-flag" /> for more details.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>reserved</structfield>[9]</entry> - <entry></entry> - <entry></entry> - <entry>Reserved for future extensions. Drivers and applications must - set this array to zero.</entry> - </row> - </tbody> - </tgroup> - </table> - - <table pgwide="1" frame="none" id="media-v2-link"> - <title>struct <structname>media_v2_pad</structname></title> - <tgroup cols="5"> - <colspec colname="c1" /> - <colspec colname="c2" /> - <colspec colname="c3" /> - <colspec colname="c4" /> - <colspec colname="c5" /> - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>id</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Unique ID for the pad.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>source_id</structfield></entry> - <entry></entry> - <entry></entry> - <entry> - <para>On pad to pad links: unique ID for the source pad.</para> - <para>On interface to entity links: unique ID for the interface.</para> - </entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>sink_id</structfield></entry> - <entry></entry> - <entry></entry> - <entry> - <para>On pad to pad links: unique ID for the sink pad.</para> - <para>On interface to entity links: unique ID for the entity.</para> - </entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>flags</structfield></entry> - <entry></entry> - <entry></entry> - <entry>Link flags, see <xref linkend="media-link-flag" /> for more details.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>reserved</structfield>[5]</entry> - <entry></entry> - <entry></entry> - <entry>Reserved for future extensions. Drivers and applications must - set this array to zero.</entry> - </row> - </tbody> - </tgroup> - </table> - - </refsect1> - - <refsect1> - &return-value; - - <variablelist> - <varlistentry> - <term><errorcode>ENOSPC</errorcode></term> - <listitem> - <para>This is returned when either one or more of the num_entities, - num_interfaces, num_links or num_pads are non-zero and are smaller - than the actual number of elements inside the graph. This may happen - if the <constant>topology_version</constant> changed when compared - to the last time this ioctl was called. Userspace should usually - free the area for the pointers, zero the struct elements and call - this ioctl again.</para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> -</refentry> |