84b4882b99
Set value for PcieRpL1Substates according to devicetree. Chip config parameter PcieRpL1Substates uses (UPD value + 1) because UPD value of 0 for PcieRpL1Substates means disabled for FSP. In order to ensure that mainboard setting does not disable L1 substates incorrectly, chip config parameter values are offset by 1 with 0 meaning use FSP UPD default. get_l1_substate_control() ensures that the right UPD value is set in fsp_params. Chip config parameter values 0: Use FSP UPD default 1: Disable L1 substates 2: Use L1.1 3: Use L1.2 (FSP UPD default) BUG=none BRANCH=none TEST=Boot up and check FSP log for PCIe config for this values Signed-off-by: Wonkyu Kim <wonkyu.kim@intel.com> Change-Id: I66743a29ad182bd49b501ae73b79270a9eb88450 Reviewed-on: https://review.coreboot.org/c/coreboot/+/39412 Reviewed-by: Caveh Jalali <caveh@chromium.org> Reviewed-by: Nick Vaccaro <nvaccaro@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> |
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