On 9/12/19 10:10 PM, Jacopo Mondi wrote: > Add documentation for the V4L2_CID_CAMERA_SENSOR_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 | 32 +++++++++++++++++++ > 1 file changed, 32 insertions(+) > > diff --git a/Documentation/media/uapi/v4l/ext-ctrls-camera.rst b/Documentation/media/uapi/v4l/ext-ctrls-camera.rst > index 51c1d5c9eb00..f879dcc9409c 100644 > --- a/Documentation/media/uapi/v4l/ext-ctrls-camera.rst > +++ b/Documentation/media/uapi/v4l/ext-ctrls-camera.rst > @@ -510,6 +510,38 @@ 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_CAMERA_SENSOR_LOCATION (integer)`` > + This read-only control describes the camera sensor location by reporting > + its mounting position on the device where the camera is installed. The > + control value is constant and not modifiable by software. 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 as -> since > + expressed as a position relative to the device intended usage orientation. device -> device's > + For example, a camera sensor installed on the user-facing side of a phone, > + a tablet or a laptop device is said to be installed in the > + ``V4L2_LOCATION_FRONT`` location while camera sensors installed on the side > + opposite the front one are said to be installed in the > + ``V4L2_LOCATION_BACK`` location. Camera sensors not directly attached to > + the device or attached in a way that allows it to move freely, such as it -> them (plural) > + webcams and digital cameras, are said to be have ``V4L2_LOCATION_EXTERNAL`` to be have -> to have the > + location. > + > + > + > +.. flat-table:: > + :header-rows: 0 > + :stub-columns: 0 > + > + * - ``V4L2_LOCATION_FRONT`` > + - The camera sensor is located on the front side of the device. > + * - ``V4L2_LOCATION_BACK`` > + - The camera sensor is located on the back side of the device. > + * - ``V4L2_LOCATION_EXTERNAL`` > + - The camera sensor is not directly attached to the device and is > + freely movable. > + > + > + > .. [#f1] > This control may be changed to a menu control in the future, if more > options are required. > Regards, Hans
