ATOM_BIOS_FUNCTION_DEVICE_ON_OFF 8252 drivers/gpu/drm/amd/include/atombios.h #define ATOM_BIOS_FUNCTION_DEVICE_ON_OFF        0x8E
ATOM_BIOS_FUNCTION_DEVICE_ON_OFF 6982 drivers/gpu/drm/radeon/atombios.h #define ATOM_BIOS_FUNCTION_DEVICE_ON_OFF        0x8E