RADEON_LVDS_BL_MOD_LEVEL_MASK
RADEON_LVDS_BL_MOD_LEVEL_MASK);
RADEON_LVDS_BL_MOD_LEVEL_MASK;
lvds_gen_cntl &= ~(RADEON_LVDS_BL_MOD_EN | RADEON_LVDS_BL_MOD_LEVEL_MASK);
level = ((lvds_gen_cntl & RADEON_LVDS_BL_MOD_LEVEL_MASK) >>