[media] Documentation: Fix V4L2_CTRL_FLAG_VOLATILE

V4L2_CTRL_FLAG_VOLATILE behaviour when V4L2_CTRL_FLAG_EXECUTE_ON_WRITE
is set was not properly explained.

Also set some hyperlink to ease the Documentation browsing.

Credit-to: Hans Verkuil <hansverk@cisco.com>

[mchehab@s-opensource.com: fix a trivial merge conflict]
Reported-by: Dimitrios Katsaros <patcherwork@gmail.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/Documentation/media/uapi/v4l/vidioc-queryctrl.rst b/Documentation/media/uapi/v4l/vidioc-queryctrl.rst
index 5817264..db3ad92 100644 (file)
--- a/Documentation/media/uapi/v4l/vidioc-queryctrl.rst
+++ b/Documentation/media/uapi/v4l/vidioc-queryctrl.rst
@@ -754,10 +754,12 @@ See also the examples in :ref:`control`.
 
          .. note::
 
-            Setting a new value for a volatile control will have no
-            effect and no ``V4L2_EVENT_CTRL_CH_VALUE`` will be sent, unless
-            the ``V4L2_CTRL_FLAG_EXECUTE_ON_WRITE`` flag (see below) is
-            also set. Otherwise the new value will just be ignored.
+            Setting a new value for a volatile control will be ignored
+            unless
+            :ref:`V4L2_CTRL_FLAG_EXECUTE_ON_WRITE <FLAG_EXECUTE_ON_WRITE>`
+            is also set.
+            Setting a new value for a volatile control will *never* trigger a
+            :ref:`V4L2_EVENT_CTRL_CH_VALUE <ctrl-changes-flags>` event.
 
     -  .. row 9
 
@@ -773,6 +775,7 @@ See also the examples in :ref:`control`.
          payload of the control.
 
     -  .. row 10
+       .. _FLAG_EXECUTE_ON_WRITE:
 
        -  ``V4L2_CTRL_FLAG_EXECUTE_ON_WRITE``