doc-rst: Remove the media docbook

Now that all media documentation was converted to Sphinx, we
should get rid of the old DocBook one, as we don't want people
to submit patches against the old stuff.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 0 insertions, 456 deletions

diff --git a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
deleted file mode 100644
index eb82f7e7d06b..000000000000
--- a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
+++ /dev/null
@@ -1,456 +0,0 @@
-<refentry id="vidioc-g-ext-ctrls">
-  <refmeta>
-    <refentrytitle>ioctl VIDIOC_G_EXT_CTRLS, VIDIOC_S_EXT_CTRLS,
-VIDIOC_TRY_EXT_CTRLS</refentrytitle>
-    &manvol;
-  </refmeta>
-
-  <refnamediv>
-    <refname>VIDIOC_G_EXT_CTRLS</refname>
-    <refname>VIDIOC_S_EXT_CTRLS</refname>
-    <refname>VIDIOC_TRY_EXT_CTRLS</refname>
-    <refpurpose>Get or set the value of several controls, try control
-values</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_ext_controls
-*<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_G_EXT_CTRLS, VIDIOC_S_EXT_CTRLS,
-VIDIOC_TRY_EXT_CTRLS</para>
-	</listitem>
-      </varlistentry>
-      <varlistentry>
-	<term><parameter>argp</parameter></term>
-	<listitem>
-	  <para></para>
-	</listitem>
-      </varlistentry>
-    </variablelist>
-  </refsect1>
-
-  <refsect1>
-    <title>Description</title>
-
-    <para>These ioctls allow the caller to get or set multiple
-controls atomically. Control IDs are grouped into control classes (see
-<xref linkend="ctrl-class" />) and all controls in the control array
-must belong to the same control class.</para>
-
-    <para>Applications must always fill in the
-<structfield>count</structfield>,
-<structfield>which</structfield>,
-<structfield>controls</structfield> and
-<structfield>reserved</structfield> fields of &v4l2-ext-controls;, and
-initialize the &v4l2-ext-control; array pointed to by the
-<structfield>controls</structfield> fields.</para>
-
-    <para>To get the current value of a set of controls applications
-initialize the <structfield>id</structfield>,
-<structfield>size</structfield> and <structfield>reserved2</structfield> fields
-of each &v4l2-ext-control; and call the
-<constant>VIDIOC_G_EXT_CTRLS</constant> ioctl. String controls controls
-must also set the <structfield>string</structfield> field. Controls
-of compound types (<constant>V4L2_CTRL_FLAG_HAS_PAYLOAD</constant> is set)
-must set the <structfield>ptr</structfield> field.</para>
-
-    <para>If the <structfield>size</structfield> is too small to
-receive the control result (only relevant for pointer-type controls
-like strings), then the driver will set <structfield>size</structfield>
-to a valid value and return an &ENOSPC;. You should re-allocate the
-memory to this new size and try again. For the string type it is possible that
-the same issue occurs again if the string has grown in the meantime. It is
-recommended to call &VIDIOC-QUERYCTRL; first and use
-<structfield>maximum</structfield>+1 as the new <structfield>size</structfield>
-value. It is guaranteed that that is sufficient memory.
-</para>
-
-    <para>N-dimensional arrays are set and retrieved row-by-row. You cannot set a partial
-array, all elements have to be set or retrieved. The total size is calculated
-as <structfield>elems</structfield> * <structfield>elem_size</structfield>.
-These values can be obtained by calling &VIDIOC-QUERY-EXT-CTRL;.</para>
-
-    <para>To change the value of a set of controls applications
-initialize the <structfield>id</structfield>, <structfield>size</structfield>,
-<structfield>reserved2</structfield> and
-<structfield>value/value64/string/ptr</structfield> fields of each &v4l2-ext-control; and
-call the <constant>VIDIOC_S_EXT_CTRLS</constant> ioctl. The controls
-will only be set if <emphasis>all</emphasis> control values are
-valid.</para>
-
-    <para>To check if a set of controls have correct values applications
-initialize the <structfield>id</structfield>, <structfield>size</structfield>,
-<structfield>reserved2</structfield> and
-<structfield>value/value64/string/ptr</structfield> fields of each &v4l2-ext-control; and
-call the <constant>VIDIOC_TRY_EXT_CTRLS</constant> ioctl. It is up to
-the driver whether wrong values are automatically adjusted to a valid
-value or if an error is returned.</para>
-
-    <para>When the <structfield>id</structfield> or
-<structfield>which</structfield> is invalid drivers return an
-&EINVAL;. When the value is out of bounds drivers can choose to take
-the closest valid value or return an &ERANGE;, whatever seems more
-appropriate. In the first case the new value is set in
-&v4l2-ext-control;. If the new control value is inappropriate (e.g. the
-given menu index is not supported by the menu control), then this will
-also result in an &EINVAL; error.</para>
-
-    <para>The driver will only set/get these controls if all control
-values are correct. This prevents the situation where only some of the
-controls were set/get. Only low-level errors (&eg; a failed i2c
-command) can still cause this situation.</para>
-
-    <table pgwide="1" frame="none" id="v4l2-ext-control">
-      <title>struct <structname>v4l2_ext_control</structname></title>
-      <tgroup cols="4">
-	&cs-ustr;
-	<tbody valign="top">
-	  <row>
-	    <entry>__u32</entry>
-	    <entry><structfield>id</structfield></entry>
-	    <entry></entry>
-	    <entry>Identifies the control, set by the
-application.</entry>
-	  </row>
-	  <row>
-	    <entry>__u32</entry>
-	    <entry><structfield>size</structfield></entry>
-	    <entry></entry>
-	    <entry>The total size in bytes of the payload of this
-control. This is normally 0, but for pointer controls this should be
-set to the size of the memory containing the payload, or that will
-receive the payload. If <constant>VIDIOC_G_EXT_CTRLS</constant> finds
-that this value is less than is required to store
-the payload result, then it is set to a value large enough to store the
-payload result and ENOSPC is returned. Note that for string controls
-this <structfield>size</structfield> field should not be confused with the length of the string.
-This field refers to the size of the memory that contains the string.
-The actual <emphasis>length</emphasis> of the string may well be much smaller.
-</entry>
-	  </row>
-	  <row>
-	    <entry>__u32</entry>
-	    <entry><structfield>reserved2</structfield>[1]</entry>
-	    <entry></entry>
-	    <entry>Reserved for future extensions. Drivers and
-applications must set the array to zero.</entry>
-	  </row>
-	  <row>
-	    <entry>union</entry>
-	    <entry>(anonymous)</entry>
-	  </row>
-	  <row>
-	    <entry></entry>
-	    <entry>__s32</entry>
-	    <entry><structfield>value</structfield></entry>
-	    <entry>New value or current value. Valid if this control is not of
-type <constant>V4L2_CTRL_TYPE_INTEGER64</constant> and
-<constant>V4L2_CTRL_FLAG_HAS_PAYLOAD</constant> is not set.</entry>
-	  </row>
-	  <row>
-	    <entry></entry>
-	    <entry>__s64</entry>
-	    <entry><structfield>value64</structfield></entry>
-	    <entry>New value or current value. Valid if this control is of
-type <constant>V4L2_CTRL_TYPE_INTEGER64</constant> and
-<constant>V4L2_CTRL_FLAG_HAS_PAYLOAD</constant> is not set.</entry>
-	  </row>
-	  <row>
-	    <entry></entry>
-	    <entry>char *</entry>
-	    <entry><structfield>string</structfield></entry>
-	    <entry>A pointer to a string. Valid if this control is of
-type <constant>V4L2_CTRL_TYPE_STRING</constant>.</entry>
-	  </row>
-	  <row>
-	    <entry></entry>
-	    <entry>__u8 *</entry>
-	    <entry><structfield>p_u8</structfield></entry>
-	    <entry>A pointer to a matrix control of unsigned 8-bit values.
-Valid if this control is of type <constant>V4L2_CTRL_TYPE_U8</constant>.</entry>
-	  </row>
-	  <row>
-	    <entry></entry>
-	    <entry>__u16 *</entry>
-	    <entry><structfield>p_u16</structfield></entry>
-	    <entry>A pointer to a matrix control of unsigned 16-bit values.
-Valid if this control is of type <constant>V4L2_CTRL_TYPE_U16</constant>.</entry>
-	  </row>
-	  <row>
-	    <entry></entry>
-	    <entry>__u32 *</entry>
-	    <entry><structfield>p_u32</structfield></entry>
-	    <entry>A pointer to a matrix control of unsigned 32-bit values.
-Valid if this control is of type <constant>V4L2_CTRL_TYPE_U32</constant>.</entry>
-	  </row>
-	  <row>
-	    <entry></entry>
-	    <entry>void *</entry>
-	    <entry><structfield>ptr</structfield></entry>
-	    <entry>A pointer to a compound type which can be an N-dimensional array and/or a
-compound type (the control's type is >= <constant>V4L2_CTRL_COMPOUND_TYPES</constant>).
-Valid if <constant>V4L2_CTRL_FLAG_HAS_PAYLOAD</constant> is set for this control.
-</entry>
-	  </row>
-	</tbody>
-      </tgroup>
-    </table>
-
-    <table pgwide="1" frame="none" id="v4l2-ext-controls">
-      <title>struct <structname>v4l2_ext_controls</structname></title>
-      <tgroup cols="3">
-	&cs-str;
-	<tbody valign="top">
-	 <row>
-	    <entry>union</entry>
-	    <entry>(anonymous)</entry>
-	  </row>
-	  <row>
-	    <entry></entry>
-	    <entry>__u32</entry>
-	    <entry><structfield>ctrl_class</structfield></entry>
-	    <entry>The control class to which all controls belong, see
-<xref linkend="ctrl-class" />. Drivers that use a kernel framework for handling
-controls will also accept a value of 0 here, meaning that the controls can
-belong to any control class. Whether drivers support this can be tested by setting
-<structfield>ctrl_class</structfield> to 0 and calling <constant>VIDIOC_TRY_EXT_CTRLS</constant>
-with a <structfield>count</structfield> of 0. If that succeeds, then the driver
-supports this feature.</entry>
-	  </row>
-	  <row>
-	    <entry></entry>
-	    <entry>__u32</entry>
-	    <entry><structfield>which</structfield></entry>
-	    <entry><para>Which value of the control to get/set/try. <constant>V4L2_CTRL_WHICH_CUR_VAL</constant>
-will return the current value of the control and <constant>V4L2_CTRL_WHICH_DEF_VAL</constant> will
-return the default value of the control. Please note that you can only get the default value of the
-control, you cannot set or try it.</para>
-<para>For backwards compatibility you can also use a control class here (see
-<xref linkend="ctrl-class" />). In that case all controls have to belong to that
-control class. This usage is deprecated, instead just use <constant>V4L2_CTRL_WHICH_CUR_VAL</constant>.
-There are some very old drivers that do not yet support <constant>V4L2_CTRL_WHICH_CUR_VAL</constant>
-and that require a control class here. You can test for such drivers by setting ctrl_class to
-<constant>V4L2_CTRL_WHICH_CUR_VAL</constant> and calling VIDIOC_TRY_EXT_CTRLS with a count of 0.
-If that fails, then the driver does not support <constant>V4L2_CTRL_WHICH_CUR_VAL</constant>.</para>
-</entry>
-	  </row>
-	  <row>
-	    <entry>__u32</entry>
-	    <entry><structfield>count</structfield></entry>
-	    <entry>The number of controls in the controls array. May
-also be zero.</entry>
-	  </row>
-	  <row>
-	    <entry>__u32</entry>
-	    <entry><structfield>error_idx</structfield></entry>
-	    <entry><para>Set by the driver in case of an error. If the error is
-associated with a particular control, then <structfield>error_idx</structfield>
-is set to the index of that control. If the error is not related to a specific
-control, or the validation step failed (see below), then
-<structfield>error_idx</structfield> is set to <structfield>count</structfield>.
-The value is undefined if the ioctl returned 0 (success).</para>
-
-<para>Before controls are read from/written to hardware a validation step
-takes place: this checks if all controls in the list are valid controls,
-if no attempt is made to write to a read-only control or read from a write-only
-control, and any other up-front checks that can be done without accessing the
-hardware. The exact validations done during this step are driver dependent
-since some checks might require hardware access for some devices, thus making
-it impossible to do those checks up-front. However, drivers should make a
-best-effort to do as many up-front checks as possible.</para>
-
-<para>This check is done to avoid leaving the hardware in an inconsistent state due
-to easy-to-avoid problems. But it leads to another problem: the application needs to
-know whether an error came from the validation step (meaning that the hardware
-was not touched) or from an error during the actual reading from/writing to hardware.</para>
-
-<para>The, in hindsight quite poor, solution for that is to set <structfield>error_idx</structfield>
-to <structfield>count</structfield> if the validation failed. This has the
-unfortunate side-effect that it is not possible to see which control failed the
-validation. If the validation was successful and the error happened while
-accessing the hardware, then <structfield>error_idx</structfield> is less than
-<structfield>count</structfield> and only the controls up to
-<structfield>error_idx-1</structfield> were read or written correctly, and the
-state of the remaining controls is undefined.</para>
-
-<para>Since <constant>VIDIOC_TRY_EXT_CTRLS</constant> does not access hardware
-there is also no need to handle the validation step in this special way,
-so <structfield>error_idx</structfield> will just be set to the control that
-failed the validation step instead of to <structfield>count</structfield>.
-This means that if <constant>VIDIOC_S_EXT_CTRLS</constant> fails with
-<structfield>error_idx</structfield> set to <structfield>count</structfield>,
-then you can call <constant>VIDIOC_TRY_EXT_CTRLS</constant> to try to discover
-the actual control that failed the validation step. Unfortunately, there
-is no <constant>TRY</constant> equivalent for <constant>VIDIOC_G_EXT_CTRLS</constant>.
-</para></entry>
-	  </row>
-	  <row>
-	    <entry>__u32</entry>
-	    <entry><structfield>reserved</structfield>[2]</entry>
-	    <entry>Reserved for future extensions. Drivers and
-applications must set the array to zero.</entry>
-	  </row>
-	  <row>
-	    <entry>&v4l2-ext-control; *</entry>
-	    <entry><structfield>controls</structfield></entry>
-	    <entry>Pointer to an array of
-<structfield>count</structfield> v4l2_ext_control structures. Ignored
-if <structfield>count</structfield> equals zero.</entry>
-	  </row>
-	</tbody>
-      </tgroup>
-    </table>
-
-    <table pgwide="1" frame="none" id="ctrl-class">
-      <title>Control classes</title>
-      <tgroup cols="3">
-	&cs-def;
-	<tbody valign="top">
-	  <row>
-	    <entry><constant>V4L2_CTRL_CLASS_USER</constant></entry>
-	    <entry>0x980000</entry>
-	    <entry>The class containing user controls. These controls
-are described in <xref linkend="control" />. All controls that can be set
-using the &VIDIOC-S-CTRL; and &VIDIOC-G-CTRL; ioctl belong to this
-class.</entry>
-	  </row>
-	  <row>
-	    <entry><constant>V4L2_CTRL_CLASS_MPEG</constant></entry>
-	    <entry>0x990000</entry>
-	    <entry>The class containing MPEG compression controls.
-These controls are described in <xref
-		linkend="mpeg-controls" />.</entry>
-	  </row>
-	  <row>
-	    <entry><constant>V4L2_CTRL_CLASS_CAMERA</constant></entry>
-	    <entry>0x9a0000</entry>
-	    <entry>The class containing camera controls.
-These controls are described in <xref
-		linkend="camera-controls" />.</entry>
-	  </row>
-	  <row>
-	    <entry><constant>V4L2_CTRL_CLASS_FM_TX</constant></entry>
-	    <entry>0x9b0000</entry>
-	    <entry>The class containing FM Transmitter (FM TX) controls.
-These controls are described in <xref
-		linkend="fm-tx-controls" />.</entry>
-	  </row>
-	  <row>
-	    <entry><constant>V4L2_CTRL_CLASS_FLASH</constant></entry>
-	    <entry>0x9c0000</entry>
-	    <entry>The class containing flash device controls.
-These controls are described in <xref
-		linkend="flash-controls" />.</entry>
-	  </row>
-	  <row>
-	    <entry><constant>V4L2_CTRL_CLASS_JPEG</constant></entry>
-	    <entry>0x9d0000</entry>
-	    <entry>The class containing JPEG compression controls.
-These controls are described in <xref
-		linkend="jpeg-controls" />.</entry>
-	  </row>
-	  <row>
-	    <entry><constant>V4L2_CTRL_CLASS_IMAGE_SOURCE</constant></entry>
-	    <entry>0x9e0000</entry> <entry>The class containing image
-	    source controls. These controls are described in <xref
-	    linkend="image-source-controls" />.</entry>
-	  </row>
-	  <row>
-	    <entry><constant>V4L2_CTRL_CLASS_IMAGE_PROC</constant></entry>
-	    <entry>0x9f0000</entry> <entry>The class containing image
-	    processing controls. These controls are described in <xref
-	    linkend="image-process-controls" />.</entry>
-	  </row>
-
-	  <row>
-	    <entry><constant>V4L2_CTRL_CLASS_FM_RX</constant></entry>
-	    <entry>0xa10000</entry>
-	    <entry>The class containing FM Receiver (FM RX) controls.
-These controls are described in <xref
-		linkend="fm-rx-controls" />.</entry>
-	  </row>
-	  <row>
-	    <entry><constant>V4L2_CTRL_CLASS_RF_TUNER</constant></entry>
-	    <entry>0xa20000</entry>
-	    <entry>The class containing RF tuner controls.
-These controls are described in <xref linkend="rf-tuner-controls" />.</entry>
-	  </row>
-	</tbody>
-      </tgroup>
-    </table>
-
-  </refsect1>
-
-  <refsect1>
-    &return-value;
-
-    <variablelist>
-      <varlistentry>
-	<term><errorcode>EINVAL</errorcode></term>
-	<listitem>
-	  <para>The &v4l2-ext-control; <structfield>id</structfield>
-is invalid, the &v4l2-ext-controls;
-<structfield>which</structfield> is invalid, or the &v4l2-ext-control;
-<structfield>value</structfield> was inappropriate (e.g. the given menu
-index is not supported by the driver). This error code is
-also returned by the <constant>VIDIOC_S_EXT_CTRLS</constant> and
-<constant>VIDIOC_TRY_EXT_CTRLS</constant> ioctls if two or more
-control values are in conflict.</para>
-	</listitem>
-      </varlistentry>
-      <varlistentry>
-	<term><errorcode>ERANGE</errorcode></term>
-	<listitem>
-	  <para>The &v4l2-ext-control; <structfield>value</structfield>
-is out of bounds.</para>
-	</listitem>
-      </varlistentry>
-      <varlistentry>
-	<term><errorcode>EBUSY</errorcode></term>
-	<listitem>
-	  <para>The control is temporarily not changeable, possibly
-because another applications took over control of the device function
-this control belongs to.</para>
-	</listitem>
-      </varlistentry>
-      <varlistentry>
-	<term><errorcode>ENOSPC</errorcode></term>
-	<listitem>
-	  <para>The space reserved for the control's payload is insufficient.
-The field <structfield>size</structfield> is set to a value that is enough
-to store the payload and this error code is returned.</para>
-	</listitem>
-      </varlistentry>
-      <varlistentry>
-	<term><errorcode>EACCES</errorcode></term>
-	<listitem>
-	  <para>Attempt to try or set a read-only control or to get a
-	  write-only control.</para>
-	</listitem>
-      </varlistentry>
-    </variablelist>
-  </refsect1>
-</refentry>
-