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 <joey.peng@lcfc.corp-partner.google.com>
Change-Id: Ib95430c7ba9d84f8bafcb1febcff9b4e4038cadc
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66622
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
diff --git a/src/mainboard/google/brya/variants/taniks/overridetree.cb b/src/mainboard/google/brya/variants/taniks/overridetree.cb
index fe37f68..fe05d08 100644
--- a/src/mainboard/google/brya/variants/taniks/overridetree.cb
+++ b/src/mainboard/google/brya/variants/taniks/overridetree.cb
@@ -36,6 +36,10 @@
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"