Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751296AbdHRJSj (ORCPT ); Fri, 18 Aug 2017 05:18:39 -0400 Received: from gloria.sntech.de ([95.129.55.99]:54914 "EHLO gloria.sntech.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750807AbdHRJSi (ORCPT ); Fri, 18 Aug 2017 05:18:38 -0400 From: Heiko Stuebner To: William Wu Cc: robh+dt@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, frank.wang@rock-chips.com, huangtao@rock-chips.com, daniel.meng@rock-chips.com 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> User-Agent: KMail/5.2.3 (Linux/4.11.0-1-amd64; KDE/5.28.0; x86_64; ; ) In-Reply-To: <1502958272-1384-1-git-send-email-william.wu@rock-chips.com> References: <1502958272-1384-1-git-send-email-william.wu@rock-chips.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 595 Lines: 17 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