VIDIOC_S_CTRL and VIDIOC_S_EXT_CTRLS return EACCES when setting a read-only
control VIDIOC_TRY_EXT_CTRLS when trying a read-only control and
VIDIOC_G_CTRL and VIDIOC_G_EXT_CTRLS when getting a write-only control.
Document this.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxxxxxxxxxxxxx>
---
Documentation/DocBook/v4l/vidioc-g-ctrl.xml | 7 +++++++
Documentation/DocBook/v4l/vidioc-g-ext-ctrls.xml | 7 +++++++
2 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/Documentation/DocBook/v4l/vidioc-g-ctrl.xml b/Documentation/DocBook/v4l/vidioc-g-ctrl.xml
index 8b5e6ff..5146d00 100644
--- a/Documentation/DocBook/v4l/vidioc-g-ctrl.xml
+++ b/Documentation/DocBook/v4l/vidioc-g-ctrl.xml
@@ -117,6 +117,13 @@ because another applications took over control of the device function
this control belongs to.</para>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><errorcode>EACCES</errorcode></term>
+ <listitem>
+ <para>Attempt to set a read-only control or to get a
+ write-only control.</para>
+ </listitem>
+ </varlistentry>
</variablelist>
</refsect1>
</refentry>
diff --git a/Documentation/DocBook/v4l/vidioc-g-ext-ctrls.xml b/Documentation/DocBook/v4l/vidioc-g-ext-ctrls.xml
index 3aa7f8f..5e73517 100644
--- a/Documentation/DocBook/v4l/vidioc-g-ext-ctrls.xml
+++ b/Documentation/DocBook/v4l/vidioc-g-ext-ctrls.xml
@@ -294,6 +294,13 @@ 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>
--
1.7.2.5
--
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