[PATCH] arm64: dts: rockchip: disable tx ipgap linecheck for rk3399 dwc3

Heiko Stuebner heiko at sntech.de
Fri Aug 18 02:18:24 PDT 2017


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 at rock-chips.com>

applied for 4.14


Thanks
Heiko



More information about the Linux-rockchip mailing list