[coreboot-gerrit] Change in coreboot[master]: mb/google/zork: update USB 2.0 controller Lane Parameter for dirinboz

[Kevin Chiu (Code Review)]

Hello Kevin Chiu,

I'd like you to do a code review. Please visit

https://review.coreboot.org/c/coreboot/+/47857

to review the following change.

Change subject: mb/google/zork: update USB 2.0 controller Lane Parameter for dirinboz
......................................................................

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

Enhance USB 2.0 M/B C0, DB C1 A1 port:
HS DC Voltage Level(TXVREFTUNE0): 0x6
COMPDISTUNE(COMPDISTUNE0): 0x5

BUG=b:165209698
BRANCH=zork
TEST=emerge-zork coreboot

Change-Id: I371e4295c2ee161096f0a277c0c649bf217269b2
Signed-off-by: Kevin Chiu 
---
M src/mainboard/google/zork/variants/dirinboz/overridetree.cb
1 file changed, 39 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/57/47857/1

diff --git a/src/mainboard/google/zork/variants/dirinboz/overridetree.cb b/src/mainboard/google/zork/variants/dirinboz/overridetree.cb
index efd1dfc..7b63079 100644
--- a/src/mainboard/google/zork/variants/dirinboz/overridetree.cb
+++ b/src/mainboard/google/zork/variants/dirinboz/overridetree.cb
@@ -21,6 +21,45 @@
    register "telemetry_vddcr_soc_offset" = "167"
    # End : OPN Performance Configuration

+	# USB 2.0 strength
+	register "usb_2_port_tune_params[0]" = "{
+		.com_pds_tune = 0x05,
+		.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_vref_tune = 0x6,
+		.tx_hsxv_tune = 0x3,
+		.tx_res_tune = 0x01,
+	}"
+
+	# USB 2.0 strength
+	register "usb_2_port_tune_params[2]" = "{
+		.com_pds_tune = 0x05,
+		.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_vref_tune = 0x6,
+		.tx_hsxv_tune = 0x3,
+		.tx_res_tune = 0x01,
+	}"
+
+	# USB 2.0 strength
+	register "usb_2_port_tune_params[3]" = "{
+		.com_pds_tune = 0x05,
+		.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_vref_tune = 0x6,
+		.tx_hsxv_tune = 0x3,
+		.tx_res_tune = 0x01,
+	}"
+
    # I2C2 for touchscreen and trackpad
    register "i2c[2]" = "{
    	.speed = I2C_SPEED_FAST,