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mb/google/zork: update USB 2.0 controller Lane Parameter for morphius 

from AMD USB phy specialist recommended that TXVREFTUNE0 shouldn't over 0xD (the maximum)
in order to have enough room to accomdate a safe disconnect threshhold in COMPDISTUNE0.
TXVREFTUNE0: 0xf -> 0xd

BUG=b:172687208
BRANCH=zork
TEST=emerge-zork coreboot

Signed-off-by: Kevin Chiu <kevin.chiu@quantatw.com>
Change-Id: Ia104454d95e5e8d6a212c97fb09d61125945eeea
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48653
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
This commit is contained in:
Kevin Chiu 2020-12-16 14:24:05 +08:00 committed by Furquan Shaikh
parent 3b3dd84fb1
commit ad77576bcb
1 changed files with 1 additions and 1 deletions
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2
src/mainboard/google/zork/variants/morphius/overridetree.cb
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@ -43,7 +43,7 @@ chip soc/amd/picasso
.tx_pre_emp_amp_tune = 0x03,
.tx_pre_emp_pulse_tune = 0x0,
.tx_rise_tune = 0x1,
.tx_vref_tune = 0xf,
.tx_vref_tune = 0xd,
.tx_hsxv_tune = 0x3,
.tx_res_tune = 0x01,
}"