AeMeteringMode, AeConstraintMode, and AeExposureMode are new enum type controls used to specify operating modes in the AE algorithm. All modes may not be supported by all platforms. ExposureValue is a new control used to set the log2 exposure adjustment for the AE algorithm. Lux is a new control that returns the current lux estimate. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>