mb/google/volteer: Update Eldrid USB2 port settings in overridetree
1. Disable M.2 WWAN and Type-A Port A1
2. Change register 4 to 3 and tuning USB2 Port1 eye diagram
3. Lower camera driving
BUG=b:169105751
Signed-off-by: Nick Chen <nick_xr_chen@wistron.corp-partner.google.com>
Change-Id: I6b8a5c0d5e814de232d79a43354f5ec0220fc5ea
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47863
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
diff --git a/src/mainboard/google/volteer/variants/eldrid/overridetree.cb b/src/mainboard/google/volteer/variants/eldrid/overridetree.cb
index 72571c0..51bc991 100644
--- a/src/mainboard/google/volteer/variants/eldrid/overridetree.cb
+++ b/src/mainboard/google/volteer/variants/eldrid/overridetree.cb
@@ -58,12 +58,22 @@
},
},
}"
- #These settings improve the USB2 Port1 eye diagram
+
+ #Disable Type-A Port A1
+ register "usb2_ports[1]" = "USB2_PORT_EMPTY"
+
+ #Disable M.2 WWAN
+ register "usb2_ports[2]" = "USB2_PORT_EMPTY"
+
+ #improve the USB2 Port1 eye diagram
+ register "usb2_ports[3]" = "USB2_PORT_SHORT(OC_SKIP)"
+
+ #lower camera driving
register "usb2_ports[4]" = "{
.enable = 1,
- .tx_bias = 7,
- .tx_emp_enable = 7,
- .pre_emp_bias = 3,
+ .tx_bias = 0,
+ .tx_emp_enable = 0,
+ .pre_emp_bias = 0,
.pre_emp_bit = 0,
}"