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arm64: dts: rockchip: disable tx ipgap linecheck for rk3399 dwc3 

RK3399 USB DWC3 controller has a issue that FS/LS devices not
recognized if inserted through USB 3.0 HUB. It's because that
the inter-packet delay between the SSPLIT token to SETUP token
is about 566ns, more then the USB spec requirement.

This patch adds a quirk "snps,dis-tx-ipgap-linecheck-quirk" to
disable the u2mac linestate check to decrease the SSPLIT token
to SETUP token inter-packet delay from 566ns to 466ns.

Signed-off-by: William Wu <william.wu@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
William Wu 2017-08-17 16:24:32 +08:00 committed by Heiko Stuebner
parent ed562b2f39
commit 1d5bcbbd98
1 changed files with 2 additions and 0 deletions
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2
arch/arm64/boot/dts/rockchip/rk3399.dtsi
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@ -412,6 +412,7 @@ usbdrd_dwc3_0: dwc3 {
snps,dis-u2-freeclk-exists-quirk;
snps,dis_u2_susphy_quirk;
snps,dis-del-phy-power-chg-quirk;
snps,dis-tx-ipgap-linecheck-quirk;
status = "disabled";
};
};
@ -439,6 +440,7 @@ usbdrd_dwc3_1: dwc3 {
snps,dis-u2-freeclk-exists-quirk;
snps,dis_u2_susphy_quirk;
snps,dis-del-phy-power-chg-quirk;
snps,dis-tx-ipgap-linecheck-quirk;
status = "disabled";
};
};