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Commit 1d5bcbbd authored by William Wu's avatar William Wu Committed by Heiko Stuebner
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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: default avatarWilliam Wu <william.wu@rock-chips.com>
Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
parent ed562b2f

arch/arm64/boot/dts/rockchip/rk3399.dtsi

+2 −0
Original line number Original line Diff line number Diff line
@@ -412,6 +412,7 @@ 
			snps,dis-u2-freeclk-exists-quirk;

			snps,dis-u2-freeclk-exists-quirk;

			snps,dis_u2_susphy_quirk;

			snps,dis_u2_susphy_quirk;

			snps,dis-del-phy-power-chg-quirk;

			snps,dis-del-phy-power-chg-quirk;

			snps,dis-tx-ipgap-linecheck-quirk;

			status = "disabled";

			status = "disabled";

		};

		};

	};

	};
@@ -439,6 +440,7 @@ 
			snps,dis-u2-freeclk-exists-quirk;

			snps,dis-u2-freeclk-exists-quirk;

			snps,dis_u2_susphy_quirk;

			snps,dis_u2_susphy_quirk;

			snps,dis-del-phy-power-chg-quirk;

			snps,dis-del-phy-power-chg-quirk;

			snps,dis-tx-ipgap-linecheck-quirk;

			status = "disabled";

			status = "disabled";

		};

		};

	};

	};