mmCP_HQD_IB_CONTROL
mqd->cp_hqd_ib_control = RREG32(mmCP_HQD_IB_CONTROL);
tmp = RREG32(mmCP_HQD_IB_CONTROL);
tmp = RREG32_SOC15(GC, 0, mmCP_HQD_IB_CONTROL);
WREG32_SOC15(GC, 0, mmCP_HQD_IB_CONTROL, 0);