From cf886b54efddeb0efe497659ad9710d3ed4097bf Mon Sep 17 00:00:00 2001 From: Casper Chang Date: Fri, 4 Nov 2022 10:53:00 +0800 Subject: [PATCH] mb/google/brask: Disable PCH USB2 phy power gating for moli The patch disables PCH USB2 Phy power gating to prevent possible display flicker issue for moli board. Please refer Intel doc#723158 for more information. BUG=b:257373742 TEST=Verify the build for moli board Signed-off-by: Casper Chang Change-Id: I457d410501be996f0f29ec622e1829f1581c4970 Reviewed-on: https://review.coreboot.org/c/coreboot/+/69193 Reviewed-by: Zhuohao Lee Reviewed-by: Subrata Banik Tested-by: build bot (Jenkins) Reviewed-by: Scott Chao --- src/mainboard/google/brya/variants/moli/overridetree.cb | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/mainboard/google/brya/variants/moli/overridetree.cb b/src/mainboard/google/brya/variants/moli/overridetree.cb index 8f1bf8e263..f3b28c4b90 100644 --- a/src/mainboard/google/brya/variants/moli/overridetree.cb +++ b/src/mainboard/google/brya/variants/moli/overridetree.cb @@ -14,6 +14,9 @@ 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" # Enable HDMI2 in PortA, HDMI1 in PortB, HDMI/DP in Port2 register "ddi_ports_config" = "{ [DDI_PORT_A] = DDI_ENABLE_HPD | DDI_ENABLE_DDC,