si_enable_smc_cac
si_enable_smc_cac(adev, boot_ps, false);
ret = si_enable_smc_cac(adev, new_ps, false);
ret = si_enable_smc_cac(adev, new_ps, true);
si_enable_smc_cac(rdev, boot_ps, false);
ret = si_enable_smc_cac(rdev, new_ps, false);
ret = si_enable_smc_cac(rdev, new_ps, true);