From cb09b857995de0fa908190a662112e13c2d83c47 Mon Sep 17 00:00:00 2001 From: Joey Peng Date: Thu, 11 Aug 2022 14:08:22 +0800 Subject: mb/google/brya/var/taniks: Disable PCH USB2 phy power gating for taniks The patch disables PCH USB2 Phy power gating to prevent possible display flicker issue for taniks board. Please refer Intel doc#723158 for more information. BUG=b:241965786 TEST=Verify on taniks boards. Signed-off-by: Joey Peng Change-Id: Ib95430c7ba9d84f8bafcb1febcff9b4e4038cadc Reviewed-on: https://review.coreboot.org/c/coreboot/+/66622 Tested-by: build bot (Jenkins) Reviewed-by: Tim Wawrzynczak --- src/mainboard/google/brya/variants/taniks/overridetree.cb | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'src/mainboard') diff --git a/src/mainboard/google/brya/variants/taniks/overridetree.cb b/src/mainboard/google/brya/variants/taniks/overridetree.cb index fe37f68af8..fe05d08390 100644 --- a/src/mainboard/google/brya/variants/taniks/overridetree.cb +++ b/src/mainboard/google/brya/variants/taniks/overridetree.cb @@ -36,6 +36,10 @@ fw_config end end chip soc/intel/alderlake + # 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