From 2c4b42655765fc4a1ef431c7ca276032bd14e1f9 Mon Sep 17 00:00:00 2001 From: Sridhar Siricilla Date: Sat, 2 Apr 2022 10:42:47 +0530 Subject: mb/google/brya: Disable PCH USB2 phy power gating for felwinter The patch disables PCH USB2 Phy power gating to prevent possible display flicker issue for felwinter board. Please refer Intel doc#723158 for more information. BUG=b:221461379, b:226020977 TEST=Verify the build for felwinter board Signed-off-by: Sridhar Siricilla Change-Id: I25033ea218fa3154eb99af6be43c4198f4db3bcb Reviewed-on: https://review.coreboot.org/c/coreboot/+/63294 Tested-by: build bot (Jenkins) Reviewed-by: Subrata Banik --- src/mainboard/google/brya/variants/felwinter/overridetree.cb | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/mainboard/google/brya/variants/felwinter/overridetree.cb b/src/mainboard/google/brya/variants/felwinter/overridetree.cb index a89ad95243..d2ecf4a5b0 100644 --- a/src/mainboard/google/brya/variants/felwinter/overridetree.cb +++ b/src/mainboard/google/brya/variants/felwinter/overridetree.cb @@ -44,6 +44,10 @@ chip soc/intel/alderlake [PchSerialIoIndexGSPI1] = PchSerialIoDisabled, }" + # As per Intel Advisory doc#723158, the change is required to prevent possible + # display flickering issue. + register "usb2_phy_sus_pg_disable" = "1" + # Intel Common SoC Config #+-------------------+---------------------------+ #| Field | Value | -- cgit v1.2.3