diff options
Diffstat (limited to 'src/soc/intel/alderlake')
| -rw-r--r-- | src/soc/intel/alderlake/fsp_params.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/src/soc/intel/alderlake/fsp_params.c b/src/soc/intel/alderlake/fsp_params.c index 2260259753..4c8865c090 100644 --- a/src/soc/intel/alderlake/fsp_params.c +++ b/src/soc/intel/alderlake/fsp_params.c @@ -484,18 +484,23 @@ static int get_l1_substate_control(enum L1_substates_control ctl) } /* + * Chip config parameter pcie_rp_aspm uses (UPD value + 1) because + * a UPD value of 0 for pcie_rp_aspm means disabled. In order to ensure + * that the mainboard setting does not disable ASPM incorrectly, chip + * config parameter values are offset by 1 with 0 meaning use FSP UPD default. * get_aspm_control() ensures that the right UPD value is set in fsp_params. - * 0: Disable ASPM - * 1: L0s only - * 2: L1 only - * 3: L0s and L1 - * 4: Auto configuration + * 0: Use FSP UPD default + * 1: Disable ASPM + * 2: L0s only + * 3: L1 only + * 4: L0s and L1 + * 5: Auto configuration */ static unsigned int get_aspm_control(enum ASPM_control ctl) { - if (ctl > ASPM_AUTO) + if ((ctl > ASPM_AUTO) || (ctl == ASPM_DEFAULT)) ctl = ASPM_AUTO; - return ctl; + return ctl - 1; } /* This function returns the VccIn Aux Imon IccMax values for ADL and RPL |