mmVML2_MEM_ECC_CNTL
WREG32_SOC15(GC, 0, mmVML2_MEM_ECC_CNTL, 0);
data = RREG32_SOC15(GC, 0, mmVML2_MEM_ECC_CNTL);
WREG32_SOC15(GC, 0, mmVML2_MEM_ECC_CNTL, 0);
RREG32_SOC15(GC, 0, mmVML2_MEM_ECC_CNTL);