From 1856effaf2397edc3e00b8c2cf2acdb9f6bd935e Mon Sep 17 00:00:00 2001 From: Nick Chen Date: Mon, 23 Nov 2020 15:40:57 +0800 Subject: 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 Change-Id: I6b8a5c0d5e814de232d79a43354f5ec0220fc5ea Reviewed-on: https://review.coreboot.org/c/coreboot/+/47863 Tested-by: build bot (Jenkins) Reviewed-by: Tim Wawrzynczak --- .../google/volteer/variants/eldrid/overridetree.cb | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) (limited to 'src/mainboard/google/volteer/variants/eldrid') diff --git a/src/mainboard/google/volteer/variants/eldrid/overridetree.cb b/src/mainboard/google/volteer/variants/eldrid/overridetree.cb index 72571c039a..51bc99159b 100644 --- a/src/mainboard/google/volteer/variants/eldrid/overridetree.cb +++ b/src/mainboard/google/volteer/variants/eldrid/overridetree.cb @@ -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, }" -- cgit v1.2.3