GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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

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:173476380
BRANCH=zork
TEST=1. emerge-zork coreboot
     2. pass USB 2.0 SI eye diagram verification

Change-Id: Ib31c5d55e30b958d3e552e8d0b4a160947444636
Signed-off-by: Kevin Chiu <kevin.chiu@quantatw.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49826
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Kevin Chiu 2021-01-22 14:52:53 +08:00 committed by Patrick Georgi
parent 5a27b75642
commit 845b65bf5e
1 changed files with 39 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
src/mainboard/google/zork/variants/gumboz/overridetree.cb
View File

@ -21,6 +21,45 @@ chip soc/amd/picasso
register "telemetry_vddcr_soc_offset" = "167" register "telemetry_vddcr_soc_offset" = "167"
# End : OPN Performance Configuration # End : OPN Performance Configuration
# USB 2.0 strength - MB type-C C0
register "usb_2_port_tune_params[0]" = "{
.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_vref_tune = 0xe,
.tx_hsxv_tune = 0x3,
.tx_res_tune = 0x01,
}"
# 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 = 0x0,
.tx_vref_tune = 0xe,
.tx_hsxv_tune = 0x3,
.tx_res_tune = 0x01,
}"
# 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 = 0x0,
.tx_vref_tune = 0xe,
.tx_hsxv_tune = 0x3,
.tx_res_tune = 0x01,
}"
# I2C2 for touchscreen and trackpad # I2C2 for touchscreen and trackpad
register "i2c[2]" = "{ register "i2c[2]" = "{
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,