Field Name            Bits   Default Description
DITHER_MODE           1:0    0x0     Dither mode
                                     POSSIBLE VALUES:
                                     00 - Truncate
                                     01 - Round
                                     02 - LUT dither
                                     03 - (reserved)
ALPHA_DITHER_MODE     3:2    0x0     POSSIBLE VALUES:
                                     00 - Truncate
                                     01 - Round
                                     02 - LUT dither
                                     03 - (reserved)