From d8f669ef555e60cd0785bd5a56d2fff947cc27d8 Mon Sep 17 00:00:00 2001 From: Wisley Chen Date: Mon, 24 Jul 2023 08:26:44 +0600 Subject: mb/google/brya/var/anahera: Disable PCH USB2 phy power gating The patch disables PCH USB2 Phy power gating to fix display flicker BUG=b:292403156 TEST=Verified on the defeat board Change-Id: If0c0e655c5d32f39b90635bb3c1d13d8b6993b59 Signed-off-by: Wisley Chen Reviewed-on: https://review.coreboot.org/c/coreboot/+/76669 Tested-by: build bot (Jenkins) Reviewed-by: Eric Lai Reviewed-by: Nick Vaccaro --- src/mainboard/google/brya/variants/anahera/overridetree.cb | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'src/mainboard/google') diff --git a/src/mainboard/google/brya/variants/anahera/overridetree.cb b/src/mainboard/google/brya/variants/anahera/overridetree.cb index fc79f5e28c..4889696ff9 100644 --- a/src/mainboard/google/brya/variants/anahera/overridetree.cb +++ b/src/mainboard/google/brya/variants/anahera/overridetree.cb @@ -23,6 +23,11 @@ fw_config end chip soc/intel/alderlake register "sagv" = "SaGv_Enabled" + + # As per Intel Advisory doc#723158, the change is required to prevent possible + # display flickering issue. + register "usb2_phy_sus_pg_disable" = "1" + # Acoustic settings register "acoustic_noise_mitigation" = "1" register "slow_slew_rate[VR_DOMAIN_IA]" = "SLEW_FAST_8" -- cgit v1.2.3