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| Started by | William Wu <william.wu@rock-chips.com> |
|---|---|
| First post | 2017-08-17 10:30 +0200 |
| Last post | 2017-08-18 11:20 +0200 |
| Articles | 2 — 2 participants |
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[PATCH] arm64: dts: rockchip: disable tx ipgap linecheck for rk3399 dwc3 William Wu <william.wu@rock-chips.com> - 2017-08-17 10:30 +0200
Re: [PATCH] arm64: dts: rockchip: disable tx ipgap linecheck for rk3399 dwc3 Heiko Stuebner <heiko@sntech.de> - 2017-08-18 11:20 +0200
| From | William Wu <william.wu@rock-chips.com> |
|---|---|
| Date | 2017-08-17 10:30 +0200 |
| Subject | [PATCH] arm64: dts: rockchip: disable tx ipgap linecheck for rk3399 dwc3 |
| Message-ID | <ufolI-2dr-1@gated-at.bofh.it> |
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> --- arch/arm64/boot/dts/rockchip/rk3399.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi index 27a4616..69cb311 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi @@ -412,6 +412,7 @@ 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 @@ 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"; }; }; -- 2.0.0
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| From | Heiko Stuebner <heiko@sntech.de> |
|---|---|
| Date | 2017-08-18 11:20 +0200 |
| Message-ID | <ufLBD-1uG-1@gated-at.bofh.it> |
| In reply to | #1713665 |
Am Donnerstag, 17. August 2017, 16:24:32 CEST schrieb William Wu: > 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> applied for 4.14 Thanks Heiko
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