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Diffstat (limited to 'Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-size.xml')
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diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-size.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-size.xml deleted file mode 100644 index 9b91b8332ba9..000000000000 --- a/Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-size.xml +++ /dev/null @@ -1,153 +0,0 @@ -<refentry id="vidioc-subdev-enum-frame-size"> - <refmeta> - <refentrytitle>ioctl VIDIOC_SUBDEV_ENUM_FRAME_SIZE</refentrytitle> - &manvol; - </refmeta> - - <refnamediv> - <refname>VIDIOC_SUBDEV_ENUM_FRAME_SIZE</refname> - <refpurpose>Enumerate media bus frame sizes</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 v4l2_subdev_frame_size_enum * - <parameter>argp</parameter></paramdef> - </funcprototype> - </funcsynopsis> - </refsynopsisdiv> - - <refsect1> - <title>Arguments</title> - - <variablelist> - <varlistentry> - <term><parameter>fd</parameter></term> - <listitem> - <para>&fd;</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>request</parameter></term> - <listitem> - <para>VIDIOC_SUBDEV_ENUM_FRAME_SIZE</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>argp</parameter></term> - <listitem> - <para></para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> - - <refsect1> - <title>Description</title> - - <para>This ioctl allows applications to enumerate all frame sizes - supported by a sub-device on the given pad for the given media bus format. - Supported formats can be retrieved with the &VIDIOC-SUBDEV-ENUM-MBUS-CODE; - ioctl.</para> - - <para>To enumerate frame sizes applications initialize the - <structfield>pad</structfield>, <structfield>which</structfield> , - <structfield>code</structfield> and <structfield>index</structfield> - fields of the &v4l2-subdev-mbus-code-enum; and call the - <constant>VIDIOC_SUBDEV_ENUM_FRAME_SIZE</constant> ioctl with a pointer to - the structure. Drivers fill the minimum and maximum frame sizes or return - an &EINVAL; if one of the input parameters is invalid.</para> - - <para>Sub-devices that only support discrete frame sizes (such as most - sensors) will return one or more frame sizes with identical minimum and - maximum values.</para> - - <para>Not all possible sizes in given [minimum, maximum] ranges need to be - supported. For instance, a scaler that uses a fixed-point scaling ratio - might not be able to produce every frame size between the minimum and - maximum values. Applications must use the &VIDIOC-SUBDEV-S-FMT; ioctl to - try the sub-device for an exact supported frame size.</para> - - <para>Available frame sizes may depend on the current 'try' formats at other - pads of the sub-device, as well as on the current active links and the - current values of V4L2 controls. See &VIDIOC-SUBDEV-G-FMT; for more - information about try formats.</para> - - <table pgwide="1" frame="none" id="v4l2-subdev-frame-size-enum"> - <title>struct <structname>v4l2_subdev_frame_size_enum</structname></title> - <tgroup cols="3"> - &cs-str; - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>index</structfield></entry> - <entry>Number of the format in the enumeration, set by the - application.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>pad</structfield></entry> - <entry>Pad number as reported by the media controller API.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>code</structfield></entry> - <entry>The media bus format code, as defined in - <xref linkend="v4l2-mbus-format" />.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>min_width</structfield></entry> - <entry>Minimum frame width, in pixels.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>max_width</structfield></entry> - <entry>Maximum frame width, in pixels.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>min_height</structfield></entry> - <entry>Minimum frame height, in pixels.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>max_height</structfield></entry> - <entry>Maximum frame height, in pixels.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>which</structfield></entry> - <entry>Frame sizes to be enumerated, from &v4l2-subdev-format-whence;.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>reserved</structfield>[8]</entry> - <entry>Reserved for future extensions. Applications and drivers must - set the array to zero.</entry> - </row> - </tbody> - </tgroup> - </table> - </refsect1> - - <refsect1> - &return-value; - - <variablelist> - <varlistentry> - <term><errorcode>EINVAL</errorcode></term> - <listitem> - <para>The &v4l2-subdev-frame-size-enum; <structfield>pad</structfield> - references a non-existing pad, the <structfield>code</structfield> is - invalid for the given pad or the <structfield>index</structfield> - field is out of bounds.</para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> -</refentry> |