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mb/google/brya/var/marasov: Disable Tccold Handshake 

The patch disables Tccold Handshake to prevent possible display
flicker issue for marasov board. Please refer to Intel doc#723158
for more information.

BUG=b:279117758
BRANCH=firmware-brya-14505.B
TEST=Boot to OS on marasov.

Signed-off-by: Frank Chu <Frank_Chu@pegatron.corp-partner.google.com>
Change-Id: I286e88e5bec240d64e6c801648f6483ad2b0939c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74931
Reviewed-by: Frank Chu <frank_chu@pegatron.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
This commit is contained in:
Frank Chu 2023-05-03 14:06:48 +08:00 committed by Felix Held
parent 2606acfd4b
commit 3cb09273c1
1 changed files with 1 additions and 1 deletions
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src/mainboard/google/brya/variants/marasov/overridetree.cb
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@ -88,7 +88,7 @@ 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"
register "disable_dynamic_tccold_handshake" = "true"
register "serial_io_i2c_mode" = "{
[PchSerialIoIndexI2C0] = PchSerialIoPci,