mmSCRATCH_ADDR   2105 drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c 	WREG32(mmSCRATCH_ADDR, 0);
mmSCRATCH_ADDR   2617 drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c 	WREG32(mmSCRATCH_ADDR, 0);