ATOM_BIOS_FUNCTION_DEVICE_SWITCH 8241 drivers/gpu/drm/amd/include/atombios.h #define ATOM_BIOS_FUNCTION_DEVICE_SWITCH        0x18
ATOM_BIOS_FUNCTION_DEVICE_SWITCH 6971 drivers/gpu/drm/radeon/atombios.h #define ATOM_BIOS_FUNCTION_DEVICE_SWITCH        0x18