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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 <casper_chang@wistron.corp-partner.google.com>
Change-Id: I457d410501be996f0f29ec622e1829f1581c4970
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69193
Reviewed-by: Zhuohao Lee <zhuohao@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Scott Chao <scott_chao@wistron.corp-partner.google.com>
This commit is contained in:
Casper Chang 2022-11-04 10:53:00 +08:00 committed by Subrata Banik
parent 44bf309309
commit cf886b54ef
1 changed files with 3 additions and 0 deletions
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src/mainboard/google/brya/variants/moli/overridetree.cb
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@ -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,