From 23ddcb0bc4a952e773cf62fefc499bbbe490f7af Mon Sep 17 00:00:00 2001 From: Terry Chen Date: Fri, 1 Jul 2022 13:46:26 +0800 Subject: mb/google/brya: Disable PCH USB2 phy power gating for crota The patch disables PCH USB2 Phy power gating to prevent possible display flicker issue for primus board. Please refer Intel doc#723158 for more information. BUG=b:237725329 TEST=Verify the build for crota board Signed-off-by: Terry Chen Change-Id: I6dde74c098ba57b7cd66ce7b9ee941b8961ad20c Reviewed-on: https://review.coreboot.org/c/coreboot/+/65594 Tested-by: build bot (Jenkins) Reviewed-by: Cyan Yang Reviewed-by: Tim Wawrzynczak --- src/mainboard/google/brya/variants/crota/overridetree.cb | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'src/mainboard/google') diff --git a/src/mainboard/google/brya/variants/crota/overridetree.cb b/src/mainboard/google/brya/variants/crota/overridetree.cb index 2e51d40331..e958b68557 100644 --- a/src/mainboard/google/brya/variants/crota/overridetree.cb +++ b/src/mainboard/google/brya/variants/crota/overridetree.cb @@ -29,6 +29,10 @@ chip soc/intel/alderlake register "fast_pkg_c_ramp_disable[VR_DOMAIN_IA]" = "1" register "fast_pkg_c_ramp_disable[VR_DOMAIN_GT]" = "1" + # 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