arm64: dts: rockchip: disable tx ipgap linecheck for rk3399 dwc3
authorWilliam Wu <william.wu@rock-chips.com>
Thu, 17 Aug 2017 08:24:32 +0000 (16:24 +0800)
committerHeiko Stuebner <heiko@sntech.de>
Fri, 18 Aug 2017 09:16:55 +0000 (11:16 +0200)
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>
arch/arm64/boot/dts/rockchip/rk3399.dtsi

index 27a4616dc106e4bc2039e744b49291e0e4a2a3c4..69cb311ccb1108a82f150e0ea83d495c7b107971 100644 (file)
                        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";
                };
        };
                        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";
                };
        };