From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 78E8CC4167E for ; Mon, 14 Feb 2022 11:42:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353248AbiBNLm3 (ORCPT ); Mon, 14 Feb 2022 06:42:29 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:43198 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353779AbiBNLmA (ORCPT ); Mon, 14 Feb 2022 06:42:00 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 279FA66CB3; Mon, 14 Feb 2022 03:33:47 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B1CF4B80E63; Mon, 14 Feb 2022 11:33:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7ACC4C340EF; Mon, 14 Feb 2022 11:33:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1644838390; bh=mB4W/H/vrB0d77K6nBnjaR9o/mXDf3g7YMz3F6i2XPs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=P9eOPxoPwj3QMg77pz+4V2ZXKrBN0sxp4V6IAZ7lW13IoezGtFUAgvvOXD+9lnTma FkRvZrj6JM1DJxfvX3OP9mVNfVwJ5iasyMQRi33pnY7/KFrfyOHH6GDblmX+gkpFJH MgdN3dGv0EUn/wSaNy7fi2uuEjGz4Fhb/NaCO+Wk= Date: Mon, 14 Feb 2022 12:33:07 +0100 From: Greg KH To: =?utf-8?B?5pa96YyV6bS7?= Cc: stern@rowland.harvard.edu, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, robh+dt@kernel.org, devicetree@vger.kernel.org, wells.lu@sunplus.com Subject: Re: [PATCH v1 1/2] usb: host: ehci-sunplus: Add driver for ehci in Sunplus SP7021 Message-ID: References: <1644827562-17244-1-git-send-email-vincent.sunplus@gmail.com> <1644827562-17244-2-git-send-email-vincent.sunplus@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 14, 2022 at 05:48:20PM +0800, 施錕鴻 wrote: > Greg KH 於 2022年2月14日 週一 下午5:14寫道： > > > > On Mon, Feb 14, 2022 at 05:03:00PM +0800, 施錕鴻 wrote: > > > Hi, Greg > > > About this issue, my colleague Hammer Hsieh has explained it to > > > you recently in the mail of "[PATCH v7 2/2] serial: sunplus-uart: Add > > > Sunplus > > > SoC UART Driver". The ehci driver and uart one are in the same Sunplus Soc. > > > > I do not know what you are referring to, sorry. Remember we get > > thousands of emails a week. > > > > Please be explicit and make the code work properly for each patch you > > submit. > > > > thanks, > > > > greg k-h > > Hi, Greg > About data incoherence issue between memory bus and peripheral bus. > In case of AXI bus, use non-posted write can avoid data incoherence issue. > What if in case of post write: > Send a specific command after last write command. SDCTRL identify specific > command, means previous write command done. Then send the interrupt > signal to interrupt controller. And then interrupt controller sends done signal > to Master. Master receives done signal, means write command done. Then > issue a interrupt or proceed next write command. I do not understand what you are referring to here as I have no context :(