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google/snappy: enhance BigDaddy USB#2 2.0 strength 

Fine tune 14" BigDaddy USB#2 2.0 strength:
PERPORTPETXISET: 7
PERPORTTXISET: 1
IUSBTXEMPHASISEN: 3
PERPORTTXPEHALF: 0

this value could have USB#2 2.0 EA/function pass.

BUG=b:72922816
BRANCH=reef
TEST=emerge-snappy coreboot
Change-Id: I0ea1b966b7c02c95bf0ea1138a5629fd3b576439
Signed-off-by: Kevin Chiu <Kevin.Chiu@quantatw.com>
Reviewed-on: https://review.coreboot.org/23649
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Kevin Chiu 2018-02-08 15:58:37 +08:00 committed by Aaron Durbin
parent 1b64ae1119
commit 3be35976d6
1 changed files with 1 additions and 1 deletions
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src/mainboard/google/reef/variants/snappy/mainboard.c
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@ -92,7 +92,7 @@ void mainboard_devtree_update(struct device *dev)
case SKU_BIGDADDY_KBDBKLIGHT: case SKU_BIGDADDY_KBDBKLIGHT:
case SKU_BIGDADDY: case SKU_BIGDADDY:
cfg->usb2eye[1].Usb20PerPortPeTxiSet = 7; cfg->usb2eye[1].Usb20PerPortPeTxiSet = 7;
cfg->usb2eye[1].Usb20PerPortTxiSet = 7; cfg->usb2eye[1].Usb20PerPortTxiSet = 1;
cfg->usb2eye[1].Usb20IUsbTxEmphasisEn = 3; cfg->usb2eye[1].Usb20IUsbTxEmphasisEn = 3;
cfg->usb2eye[1].Usb20PerPortTxPeHalf = 0; cfg->usb2eye[1].Usb20PerPortTxPeHalf = 0;
break; break;