From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heiko Stuebner Subject: Re: [PATCH] arm64: dts: rockchip: disable tx ipgap linecheck for rk3399 dwc3 Date: Fri, 18 Aug 2017 11:18:24 +0200 Message-ID: <4718044.sxV3Y2WdLf@phil> References: <1502958272-1384-1-git-send-email-william.wu@rock-chips.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: In-Reply-To: <1502958272-1384-1-git-send-email-william.wu-TNX95d0MmH7DzftRWevZcw@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: William Wu Cc: robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, frank.wang-TNX95d0MmH7DzftRWevZcw@public.gmane.org, huangtao-TNX95d0MmH7DzftRWevZcw@public.gmane.org, daniel.meng-TNX95d0MmH7DzftRWevZcw@public.gmane.org List-Id: linux-rockchip.vger.kernel.org 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 applied for 4.14 Thanks Heiko -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html