LVDS_BL_MOD_LEVEL_MASK  381 include/video/aty128.h #define LVDS_BL_MOD_LEVEL_MASK			0x0000ff00
LVDS_BL_MOD_LEVEL_MASK  642 include/video/radeon.h #define LVDS_BL_MOD_LEVEL_MASK			   0x0000ff00