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-rw-r--r--src/mainboard/google/volteer/variants/delbin/overridetree.cb8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/mainboard/google/volteer/variants/delbin/overridetree.cb b/src/mainboard/google/volteer/variants/delbin/overridetree.cb
index c0eaedb25c..577404737b 100644
--- a/src/mainboard/google/volteer/variants/delbin/overridetree.cb
+++ b/src/mainboard/google/volteer/variants/delbin/overridetree.cb
@@ -44,6 +44,14 @@ chip soc/intel/tigerlake
},
},
}"
+ #These settings improve the USB2 Port1 eye diagram
+ register "usb2_ports[3]" = "{
+ .enable = 1,
+ .tx_bias = USB2_BIAS_28P15MV,
+ .tx_emp_enable = USB2_PRE_EMP_ON,
+ .pre_emp_bias = USB2_BIAS_56P3MV,
+ .pre_emp_bit = USB2_HALF_BIT_PRE_EMP,
+ }"
# Acoustic settings
register "AcousticNoiseMitigation" = "1"