mmOUTPUT_CSC_CONTROL
tmp = RREG32(mmOUTPUT_CSC_CONTROL + amdgpu_crtc->crtc_offset);
WREG32(mmOUTPUT_CSC_CONTROL + amdgpu_crtc->crtc_offset, tmp);
WREG32(mmOUTPUT_CSC_CONTROL + amdgpu_crtc->crtc_offset,
WREG32(mmOUTPUT_CSC_CONTROL + amdgpu_crtc->crtc_offset,