Rename the 'deviceName()' method to 'entityName()' as it actually
returns the name of the entity backing the v4l2 subdevice.
While at it, make the names getter methods return a const reference
instead of returning by copy.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Add test to list formats on a v4l2 subdevice.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>