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authorGravatar Mauro Carvalho Chehab <mchehab@s-opensource.com> 2016-07-27 06:32:31 -0300
committerGravatar Mauro Carvalho Chehab <mchehab@s-opensource.com> 2016-07-28 20:08:19 -0300
commit43f71d93a0cb342f0c918fba3f6abb7661e40ad2 (patch)
treea1dc7288bc480e7027ca1827ca4876472fa12e40 /Documentation/DocBook/media/v4l/func-open.xml
parentMerge tag 'media/v4.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mch... (diff)
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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>
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diff --git a/Documentation/DocBook/media/v4l/func-open.xml b/Documentation/DocBook/media/v4l/func-open.xml
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--- a/Documentation/DocBook/media/v4l/func-open.xml
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@@ -1,113 +0,0 @@
-<refentry id="func-open">
- <refmeta>
- <refentrytitle>V4L2 open()</refentrytitle>
- &manvol;
- </refmeta>
-
- <refnamediv>
- <refname>v4l2-open</refname>
- <refpurpose>Open a V4L2 device</refpurpose>
- </refnamediv>
-
- <refsynopsisdiv>
- <funcsynopsis>
- <funcsynopsisinfo>#include &lt;fcntl.h&gt;</funcsynopsisinfo>
- <funcprototype>
- <funcdef>int <function>open</function></funcdef>
- <paramdef>const char *<parameter>device_name</parameter></paramdef>
- <paramdef>int <parameter>flags</parameter></paramdef>
- </funcprototype>
- </funcsynopsis>
- </refsynopsisdiv>
-
- <refsect1>
- <title>Arguments</title>
-
- <variablelist>
- <varlistentry>
- <term><parameter>device_name</parameter></term>
- <listitem>
- <para>Device to be opened.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><parameter>flags</parameter></term>
- <listitem>
- <para>Open flags. Access mode must be
-<constant>O_RDWR</constant>. This is just a technicality, input devices
-still support only reading and output devices only writing.</para>
- <para>When the <constant>O_NONBLOCK</constant> flag is
-given, the read() function and the &VIDIOC-DQBUF; ioctl will return
-the &EAGAIN; when no data is available or no buffer is in the driver
-outgoing queue, otherwise these functions block until data becomes
-available. All V4L2 drivers exchanging data with applications must
-support the <constant>O_NONBLOCK</constant> flag.</para>
- <para>Other flags have no effect.</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
- <refsect1>
- <title>Description</title>
-
- <para>To open a V4L2 device applications call
-<function>open()</function> with the desired device name. This
-function has no side effects; all data format parameters, current
-input or output, control values or other properties remain unchanged.
-At the first <function>open()</function> call after loading the driver
-they will be reset to default values, drivers are never in an
-undefined state.</para>
- </refsect1>
- <refsect1>
- <title>Return Value</title>
-
- <para>On success <function>open</function> returns the new file
-descriptor. On error -1 is returned, and the <varname>errno</varname>
-variable is set appropriately. Possible error codes are:</para>
-
- <variablelist>
- <varlistentry>
- <term><errorcode>EACCES</errorcode></term>
- <listitem>
- <para>The caller has no permission to access the
-device.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><errorcode>EBUSY</errorcode></term>
- <listitem>
- <para>The driver does not support multiple opens and the
-device is already in use.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><errorcode>ENXIO</errorcode></term>
- <listitem>
- <para>No device corresponding to this device special file
-exists.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><errorcode>ENOMEM</errorcode></term>
- <listitem>
- <para>Not enough kernel memory was available to complete the
-request.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><errorcode>EMFILE</errorcode></term>
- <listitem>
- <para>The process already has the maximum number of
-files open.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><errorcode>ENFILE</errorcode></term>
- <listitem>
- <para>The limit on the total number of files open on the
-system has been reached.</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
-</refentry>