From c6d0a4c1a854cb51907bcf67b829954624bcff08 Mon Sep 17 00:00:00 2001 From: David Wu Date: Mon, 13 Jun 2022 17:34:33 +0800 Subject: mb/google/brya/var/kano: Disable PCH USB2 phy power gating The patch disables PCH USB2 Phy power gating to prevent possible display flicker issue for kano board. Please refer Intel doc#723158 for more information. BUG=None TEST=Verify the build for kano board Signed-off-by: David Wu Change-Id: I19430a68e1e847e71382781563200a4c88f37a59 Reviewed-on: https://review.coreboot.org/c/coreboot/+/65107 Tested-by: build bot (Jenkins) Reviewed-by: Ren Kuo --- src/mainboard/google/brya/variants/kano/overridetree.cb | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'src/mainboard/google/brya') diff --git a/src/mainboard/google/brya/variants/kano/overridetree.cb b/src/mainboard/google/brya/variants/kano/overridetree.cb index ad0d0f7749..2a1511ce8d 100644 --- a/src/mainboard/google/brya/variants/kano/overridetree.cb +++ b/src/mainboard/google/brya/variants/kano/overridetree.cb @@ -19,6 +19,10 @@ 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" + # GPE configuration register "pmc_gpe0_dw1" = "GPP_D" -- cgit v1.2.3