Make it clear in the documentation that V4L2_CTRL_FLAG_READ_ONLY doesn't conflict with V4L2_CTRL_FLAG_WRITE_ONLY. Also make it clear that if both are combined then the control has read and write permissions.
Signed-off-by: Helen Koike <[email protected]> --- Hi, v4l2-compliance expects both flags for read and write permissions, so I would like to make it clear in the docs. Please let me know if this is not the case. Thanks Helen --- Documentation/media/uapi/v4l/vidioc-queryctrl.rst | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/media/uapi/v4l/vidioc-queryctrl.rst b/Documentation/media/uapi/v4l/vidioc-queryctrl.rst index a3d56ffbf4cc..1d3aecdf679f 100644 --- a/Documentation/media/uapi/v4l/vidioc-queryctrl.rst +++ b/Documentation/media/uapi/v4l/vidioc-queryctrl.rst @@ -500,6 +500,11 @@ See also the examples in :ref:`control`. - 0x0004 - This control is permanently readable only. Any attempt to change the control will result in an ``EINVAL`` error code. + + .. note:: + + If combined with ``V4L2_CTRL_FLAG_WRITE_ONLY``, then both, read + and write are allowed. * - ``V4L2_CTRL_FLAG_UPDATE`` - 0x0008 - A hint that changing this control may affect the value of other @@ -523,6 +528,11 @@ See also the examples in :ref:`control`. where writing a value will cause the device to carry out a given action (e. g. motor control) but no meaningful value can be returned. + + .. note:: + + If combined with ``V4L2_CTRL_FLAG_READ_ONLY``, then both, read + and write are allowed. * - ``V4L2_CTRL_FLAG_VOLATILE`` - 0x0080 - This control is volatile, which means that the value of the -- 2.22.0
