From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 .../DocBook/media/v4l/vidioc-querystd.xml          | 74 ++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 Documentation/DocBook/media/v4l/vidioc-querystd.xml

(limited to 'Documentation/DocBook/media/v4l/vidioc-querystd.xml')

diff --git a/Documentation/DocBook/media/v4l/vidioc-querystd.xml b/Documentation/DocBook/media/v4l/vidioc-querystd.xml
new file mode 100644
index 00000000..fe80a183
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-querystd.xml
@@ -0,0 +1,74 @@
+<refentry id="vidioc-querystd">
+  <refmeta>
+    <refentrytitle>ioctl VIDIOC_QUERYSTD</refentrytitle>
+    &manvol;
+  </refmeta>
+
+  <refnamediv>
+    <refname>VIDIOC_QUERYSTD</refname>
+    <refpurpose>Sense the video standard received by the current
+input</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <funcsynopsis>
+      <funcprototype>
+	<funcdef>int <function>ioctl</function></funcdef>
+	<paramdef>int <parameter>fd</parameter></paramdef>
+	<paramdef>int <parameter>request</parameter></paramdef>
+	<paramdef>v4l2_std_id *<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_QUERYSTD</para>
+	</listitem>
+      </varlistentry>
+      <varlistentry>
+	<term><parameter>argp</parameter></term>
+	<listitem>
+	  <para></para>
+	</listitem>
+      </varlistentry>
+    </variablelist>
+  </refsect1>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para>The hardware may be able to detect the current video
+standard automatically. To do so, applications call <constant>
+VIDIOC_QUERYSTD</constant> with a pointer to a &v4l2-std-id; type. The
+driver stores here a set of candidates, this can be a single flag or a
+set of supported standards if for example the hardware can only
+distinguish between 50 and 60 Hz systems. When detection is not
+possible or fails, the set must contain all standards supported by the
+current video input or output.</para>
+
+  </refsect1>
+
+  <refsect1>
+    &return-value;
+    <variablelist>
+      <varlistentry>
+	<term><errorcode>ENODATA</errorcode></term>
+	<listitem>
+	  <para>Standard video timings are not supported for this input or output.</para>
+	</listitem>
+      </varlistentry>
+    </variablelist>
+  </refsect1>
+</refentry>
-- 
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