From 5a27b756423b5913c32ffbfccc9014c60b20e910 Mon Sep 17 00:00:00 2001 From: Kevin Chiu Date: Fri, 22 Jan 2021 14:33:32 +0800 Subject: mb/google/zork: update USB 2.0 controller Lane Parameter for dirinboz From AMD USB phy specialist recommended that for DB port2 (type-A), port3 (type-C C1) the most effective corrections for the depressed eye are: tx_rise_tune=0x0 tx_pre_emp_amp_tune=0x3 tx_fsls_tune = 0x3 BUG=b:165209698 BRANCH=zork TEST=1. emerge-zork coreboot 2. pass USB 2.0 SI eye diagram verification Change-Id: I80afd6bf1257b9a72d0d7651b48d243ebaf5de2f Signed-off-by: Kevin Chiu Reviewed-on: https://review.coreboot.org/c/coreboot/+/49824 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth Reviewed-by: Rob Barnes --- src/mainboard/google/zork/variants/dirinboz/overridetree.cb | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/src/mainboard/google/zork/variants/dirinboz/overridetree.cb b/src/mainboard/google/zork/variants/dirinboz/overridetree.cb index 6416a5c807..554cdeac94 100644 --- a/src/mainboard/google/zork/variants/dirinboz/overridetree.cb +++ b/src/mainboard/google/zork/variants/dirinboz/overridetree.cb @@ -21,7 +21,7 @@ chip soc/amd/picasso register "telemetry_vddcr_soc_offset" = "167" # End : OPN Performance Configuration - # USB 2.0 strength + # USB 2.0 strength - MB type-C C0 register "usb_2_port_tune_params[0]" = "{ .com_pds_tune = 0x07, .sq_rx_tune = 0x3, @@ -34,27 +34,27 @@ chip soc/amd/picasso .tx_res_tune = 0x01, }" - # USB 2.0 strength + # USB 2.0 strength - DB type-A register "usb_2_port_tune_params[2]" = "{ .com_pds_tune = 0x07, .sq_rx_tune = 0x3, .tx_fsls_tune = 0x3, .tx_pre_emp_amp_tune = 0x03, .tx_pre_emp_pulse_tune = 0x0, - .tx_rise_tune = 0x1, + .tx_rise_tune = 0x0, .tx_vref_tune = 0xe, .tx_hsxv_tune = 0x3, .tx_res_tune = 0x01, }" - # USB 2.0 strength + # USB 2.0 strength - DB type-C C1 register "usb_2_port_tune_params[3]" = "{ .com_pds_tune = 0x07, .sq_rx_tune = 0x3, .tx_fsls_tune = 0x3, .tx_pre_emp_amp_tune = 0x03, .tx_pre_emp_pulse_tune = 0x0, - .tx_rise_tune = 0x1, + .tx_rise_tune = 0x0, .tx_vref_tune = 0xe, .tx_hsxv_tune = 0x3, .tx_res_tune = 0x01, -- cgit v1.2.3