ATOM_DPCD_MAX_LANE_MASK 4213 drivers/gpu/drm/amd/include/atombios.h #define ATOM_DPCD_MAX_LANE_MASK    0x1F
ATOM_DPCD_MAX_LANE_MASK 3732 drivers/gpu/drm/radeon/atombios.h #define ATOM_DPCD_MAX_LANE_MASK    0x1F