Change in coreboot[master]: mb/google/dedede: Modify USB 3.0 PHY parameters for galith

[Frank Chu (Code Review)]

Frank Chu has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/50253 )

Change subject: mb/google/dedede: Modify USB 3.0 PHY parameters for galith
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mb/google/dedede: Modify USB 3.0 PHY parameters for galith

Modify USB 3.0 PHY parameters for improve usb eye diagram.
USB 3.0 TypeC port2:
.tx_de_emp = 0x20,
.tx_downscale_amp = 0x00,

BUG=b:179224587
BRANCH=dedede
TEST=cros build-ap --debug -b dedede --fw-name galtic

Signed-off-by: FrankChu 
Change-Id: I66dc9b5a7280bfd42592b07f160f48797613fdd6
---
M src/mainboard/google/dedede/variants/galtic/overridetree.cb
1 file changed, 8 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/53/50253/1

diff --git a/src/mainboard/google/dedede/variants/galtic/overridetree.cb b/src/mainboard/google/dedede/variants/galtic/overridetree.cb
index 9ed1dd0..f3854e6 100644
--- a/src/mainboard/google/dedede/variants/galtic/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/galtic/overridetree.cb
@@ -57,6 +57,14 @@
    # USB Port Configuration
    register "usb2_ports[5]" = "USB2_PORT_MID(OC_SKIP)"     # Camera

+	#These settings improve the USB eye diagram
+	#USB3 Port2	
+	register "usb3_ports[1]" = "{
+		.enable = 1,
+		.tx_de_emp = 0x20,
+		.tx_downscale_amp = 0x00,
+	}"
+
    device domain 0 on
    	device pci 14.0 on
    		chip drivers/usb/acpi