ATOM_SUB_FUNCTION_SET_DPMS 8264 drivers/gpu/drm/amd/include/atombios.h #define ATOM_SUB_FUNCTION_SET_DPMS              0x0001          // BL: Sub function 01
ATOM_SUB_FUNCTION_SET_DPMS 6994 drivers/gpu/drm/radeon/atombios.h #define ATOM_SUB_FUNCTION_SET_DPMS              0x0001          // BL: Sub function 01