|author||Duncan Laurie <firstname.lastname@example.org>||Sat Dec 08 12:00:17 2018 -0800|
|committer||Patrick Georgi <email@example.com>||Mon Dec 10 08:53:57 2018 +0000|
mb/google/sarien: Setup GPIOs again after FSP-S Currently CoffeeLake FSP is incorrectly modifying GPIO pad configuration if specific UPD variables are not set as it expects. This affects the display-related SOC pads with the following UPD variables: UINT8 DdiPortBHpd; // GPP_E13 UINT8 DdiPortCHpd; // GPP_E14 UINT8 DdiPortDHpd; // GPP_E15 UINT8 DdiPortFHpd; // GPP_E16 UINT8 DdiPortBDdc; // GPP_E18/GPP_E19 UINT8 DdiPortCDdc; // GPP_E20/GPP_E21 UINT8 DdiPortDDdc; // GPP_E22/GPP_E23 UINT8 DdiPortFDdc; // GPP_H16/GPP_H17 Until FSP is fixed to not touch the pad configuration this workaround will reprogram the GPIO settings after FSP-S step so they are correct when the OS attempts to use them. This was found in CoffeLake FSP Gold release: https://github.com/IntelFsp/FSP/tree/master/CoffeeLakeFspBinPkg As well as the current top-of-tree for the FSP sources. BUG=b:120686247,chromium:913216 TEST=verify correct GPIO configuration for GPP_E group in the kernel Change-Id: I19550c4347cf65d409de6a8638619270372c4d0a Signed-off-by: Duncan Laurie <firstname.lastname@example.org> Reviewed-on: https://review.coreboot.org/c/30113 Tested-by: build bot (Jenkins) <email@example.com> Reviewed-by: Lijian Zhao <firstname.lastname@example.org> Reviewed-by: Furquan Shaikh <email@example.com>
coreboot is a Free Software project aimed at replacing the proprietary BIOS (firmware) found in most computers. coreboot performs a little bit of hardware initialization and then executes additional boot logic, called a payload.
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coreboot was formerly known as LinuxBIOS.
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