RCC_DOORBELL_APER_EN  117 drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c 	WREG32_FIELD15(NBIO, 0, RCC_DOORBELL_APER_EN, BIF_DOORBELL_APER_EN, enable ? 1 : 0);
RCC_DOORBELL_APER_EN  154 drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c 	WREG32_FIELD15(NBIO, 0, RCC_DOORBELL_APER_EN, BIF_DOORBELL_APER_EN, enable ? 1 : 0);