Felix Held submitted this change.
mb/google/zork: update USB 2.0 controller Lane Parameter for morphius
Enhance USB 2.0 SI by increasing the level of "HS DC Voltage Level"
and "Disconnect Threshold Adjustment".
COMPDISTUNE0: 0x3->0x7
TXVREFTUNE0: 0x6->0xf
BUG=b:162614573
BRANCH=zork
TEST=1. emerge-zork coreboot
2. check U2 registers are set correctly
3. test with servo v4 type-c, it's working expectedly.
4. U2 SI pass
Signed-off-by: Kevin Chiu <kevin.chiu@quantatw.com>
Change-Id: I278cc0aaddbc9fce595bf57ca69ee8abfc9f5659
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46537
Reviewed-by: Rob Barnes <robbarnes@google.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
M src/mainboard/google/zork/variants/morphius/overridetree.cb
1 file changed, 13 insertions(+), 0 deletions(-)
diff --git a/src/mainboard/google/zork/variants/morphius/overridetree.cb b/src/mainboard/google/zork/variants/morphius/overridetree.cb
index ecadb07..66b371b 100644
--- a/src/mainboard/google/zork/variants/morphius/overridetree.cb
+++ b/src/mainboard/google/zork/variants/morphius/overridetree.cb
@@ -35,6 +35,19 @@
.ports.xhci0_port2 = 1, /* Left USB3A port 2 */
}"
+ # USB 2.0 strength
+ 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,
+ .rx_vref_tune = 0xf,
+ .tx_hsxv_tune = 0x3,
+ .tx_res_tune = 0x01,
+ }"
+
# Enable I2C2 for trackpad, touchscreen, pen at 400kHz
register "i2c[2]" = "{
.speed = I2C_SPEED_FAST,
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