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authorJeremy Compostella <jeremy.compostella@intel.com>2022-06-02 16:49:48 -0700
committerAngel Pons <th3fanbus@gmail.com>2022-10-07 20:30:16 +0000
commit9159e1c5278129ae71c12a2b9d3e274a82dd09cf (patch)
tree04cec9d1ebcb10ebdf901b15d3479e289e08ee4d /payloads/external/edk2/Kconfig.name
parentaea60bcd43d0b57313ed4ec20ff28f6877095e98 (diff)
soc/intel/alderlake: Support Raptor Lake VR Fast VMODE
RaptorLake introduces the support of the Voltage Regulator Fast Vmode feature. When enabled, it makes the SoC throttle when the current exceeds the I_TRIP threshold. This threshold should be between Iccmax.app and Iccmax and take into account the specification of the Voltage Regulator of the system. This change provides a mean to: 1. Enable the feature via the `vr_config->enable_fast_vmode'. If no I_TRIP value is supplied FSPs picks an adapted I_TRIP value for the current SoC assuming a Voltage Regulator error accuracy of 6.5%. 2. Set the I_TRIP threshold via the `vr_config->fast_vmode_i_trip' field. These new fields are considered independent from the other `vr_config' fields so that the board configuration does not have to unnecessarily supply other VR settings to enable Fast VMode. Information about the Fast VMode Feature can be found in the following Intel documents: - 627270 ADL and RPL Processor Family Core and Uncore BIOS Specification - 724220 RaptorLake Platform Fast V-Mode - 686872 RaptorLake Lake U P H Platform BUG=b:243120082 BRANCH=firmware-brya-14505.B TEST=Read I_TRIP from the Pcode and verify consistency with a few `enable_fast_vmode' and `fast_vmode_i_trip' settings. Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com> Change-Id: I313acf01c534d0d32620a9dedba7cf3b304ed2ee Reviewed-on: https://review.coreboot.org/c/coreboot/+/66917 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Bora Guvendik <bora.guvendik@intel.com> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
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