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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>
This commit is contained in:
Joey Peng 2022-08-11 14:08:22 +08:00 committed by Martin L Roth
parent 41714ed541
commit cb09b85799
1 changed files with 4 additions and 0 deletions
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src/mainboard/google/brya/variants/taniks/overridetree.cb
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@ -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"