mb/google/brask: Disable PCH USB2 phy power gating for brask
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:257415959
TEST=Verify the build for brask board
Change-Id: I518e90e9032e8f2186300b6b907cc9d84a1682e4
Signed-off-by: Ricky Chang <rickytlchang@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69272
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Zhuohao Lee <zhuohao@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
diff --git a/src/mainboard/google/brya/variants/baseboard/brask/devicetree.cb b/src/mainboard/google/brya/variants/baseboard/brask/devicetree.cb
index 0d60a57..29fb5d0 100644
--- a/src/mainboard/google/brya/variants/baseboard/brask/devicetree.cb
+++ b/src/mainboard/google/brya/variants/baseboard/brask/devicetree.cb
@@ -1,4 +1,7 @@
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"
# GPE configuration
register "pmc_gpe0_dw0" = "GPP_A"