On 8/14/19 10:28 PM, Jacopo Mondi wrote: > Add documentation for the V4L2_CID_LOCATION camera control. The newly > added read-only control reports the camera device mounting position. > > Signed-off-by: Jacopo Mondi <jacopo@xxxxxxxxxx> > --- > .../media/uapi/v4l/ext-ctrls-camera.rst | 23 +++++++++++++++++++ > 1 file changed, 23 insertions(+) > > diff --git a/Documentation/media/uapi/v4l/ext-ctrls-camera.rst b/Documentation/media/uapi/v4l/ext-ctrls-camera.rst > index 51c1d5c9eb00..fc0a02eee6d4 100644 > --- a/Documentation/media/uapi/v4l/ext-ctrls-camera.rst > +++ b/Documentation/media/uapi/v4l/ext-ctrls-camera.rst > @@ -510,6 +510,29 @@ enum v4l2_scene_mode - > value down. A value of zero stops the motion if one is in progress > and has no effect otherwise. > > +``V4L2_CID_LOCATION (integer)`` > + This read-only control describes the camera location by reporting its > + mounting position on the device where the camera is installed. This > + control is particularly meaningful for devices which have a well defined > + orientation, such as phones, laptops and portable devices as the camera > + location is expressed as a position relative to the device intended > + usage position. In example, a camera installed on the user-facing side > + of a phone device is said to be installed in the ``V4L2_LOCATION_FRONT`` > + position. When should this control be created? If there is only one location (e.g. all sensors are front-facing) would you still expose this? Or does it depend on the type of device? And is the sensor in a digital camera front or back facing? (Just curious about what you think about that situation!) Regards, Hans > + > + > + > +.. flat-table:: > + :header-rows: 0 > + :stub-columns: 0 > + > + * - ``V4L2_LOCATION_FRONT`` > + - The camera device is located on the front side of the device. > + * - ``V4L2_LOCATION_BACK`` > + - The camera device is located on the back side of the device. > + > + > + > .. [#f1] > This control may be changed to a menu control in the future, if more > options are required. > -- > 2.22.0 >
