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mb/google/volteer: Update Eldrid USB2 port settings in overridetree

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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>
This commit is contained in:
Nick Chen 2020-11-23 15:40:57 +08:00 committed by Tim Wawrzynczak
parent 2f1d686ba6
commit 1856effaf2
1 changed files with 14 additions and 4 deletions
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18
src/mainboard/google/volteer/variants/eldrid/overridetree.cb
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@ -58,12 +58,22 @@ chip soc/intel/tigerlake
},
},
}"
#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,
}"