From c6bc3a56d684307770737a0ca1c34690a1289d00 Mon Sep 17 00:00:00 2001 From: Ravi Sarawadi Date: Wed, 17 Mar 2021 16:07:28 -0700 Subject: [PATCH] mb/google/volteer/variants/delbin: Disable PmcUsb2PhySusPgEnable eDP panel flicker during system idle state is observed. Disabling USB2 SUS well power gating can remove flicker symptom. Please refer to doc#634894 for more details. BUG=b:182323059 BRANCH=None TEST=Boot and confirm no display flicker. Signed-off-by: Ravi Sarawadi Change-Id: Icadf9c494fab82b219317c3ca3b04f633b543083 Reviewed-on: https://review.coreboot.org/c/coreboot/+/51613 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie --- src/mainboard/google/volteer/variants/delbin/overridetree.cb | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/mainboard/google/volteer/variants/delbin/overridetree.cb b/src/mainboard/google/volteer/variants/delbin/overridetree.cb index 5e9600b26f..c111731387 100644 --- a/src/mainboard/google/volteer/variants/delbin/overridetree.cb +++ b/src/mainboard/google/volteer/variants/delbin/overridetree.cb @@ -2,6 +2,8 @@ chip soc/intel/tigerlake register "DdiPort1Hpd" = "0" register "DdiPort2Hpd" = "0" + register "usb2_phy_sus_pg_disable" = "1" + #+-------------------+---------------------------+ #| Field | Value | #+-------------------+---------------------------+