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 3B617C433F5 for ; Wed, 23 Mar 2022 08:26:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233702AbiCWI2I (ORCPT ); Wed, 23 Mar 2022 04:28:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35678 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233616AbiCWI1q (ORCPT ); Wed, 23 Mar 2022 04:27:46 -0400 Received: from mail-ej1-f44.google.com (mail-ej1-f44.google.com [209.85.218.44]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6EE7F71EED; Wed, 23 Mar 2022 01:26:16 -0700 (PDT) Received: by mail-ej1-f44.google.com with SMTP id r22so1248019ejs.11; Wed, 23 Mar 2022 01:26:16 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:from :subject:content-language:to:cc:references:in-reply-to :content-transfer-encoding; bh=ehS00HbDulz5or5Tk0fJMs+TQwrD5m0G1J5PJzgKMNE=; b=O7wU1RrkCqW8L4KqqarAIA+C9HKkVIEI3T66Bz2Dy9jo8L56XhsC0sxcSEQhd9eQpQ 9u/UGSk5Jye3n7C+wrHpfsSYowpoZg4+qfo7XEZ31BnNpEwEoyF35uypLYxQqjj2gE4Y M5AJJtvKFdntqylXsCK8okTFzzRC2D5P3rulBFXEo5L/YahMSRXi84hwSiKoDTEPYT9O xaXFsPy1GjGxWMXauhW2PHPuDdf4bRxOl5W9Vn4saFS7/z/gAc71hwJQ9hyzpjYpMcGe cw8YYRWy+nZ97aDXPVxmwiedZJn2kqP52F9+NCNcmXBO0e9Ody0unQ/9tVX82MSYMexW sJPg== X-Gm-Message-State: AOAM532ACQoFAfC5h06kYR6lWUg2NlO79InC+kg/3VplkcsRMEgv/8zo 4/K2Lpj5+zu/X/bCJsTG8HY= X-Google-Smtp-Source: ABdhPJxLajtMp/+EHc1cvlU/roEVfTYySa7UaAQ6Sq6d6IIvhvPnifr8g12eKahCKIKgAMkeHPZf1g== X-Received: by 2002:a17:906:4fc9:b0:6e0:648e:5156 with SMTP id i9-20020a1709064fc900b006e0648e5156mr1416890ejw.412.1648023974871; Wed, 23 Mar 2022 01:26:14 -0700 (PDT) Received: from [192.168.0.17] (78-11-189-27.static.ip.netia.com.pl. [78.11.189.27]) by smtp.googlemail.com with ESMTPSA id b8-20020a170906728800b006e0351df2dcsm2441298ejl.70.2022.03.23.01.26.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 23 Mar 2022 01:26:14 -0700 (PDT) Message-ID: <0366bcc4-b38d-db36-22d6-e6f33af9dbef@kernel.org> Date: Wed, 23 Mar 2022 09:26:13 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 From: Krzysztof Kozlowski Subject: Re: [PATCH v3 4/4] usb: host: add xhci-exynos driver Content-Language: en-US To: Jung Daehwan Cc: Mathias Nyman , Greg Kroah-Hartman , "open list:USB XHCI DRIVER" , open list , Howard Yen , Jack Pham , Puma Hsu , "J . Avila" , sc.suh@samsung.com References: <1647853194-62147-1-git-send-email-dh10.jung@samsung.com> <1647853194-62147-5-git-send-email-dh10.jung@samsung.com> <20220323023420.GC19041@ubuntu> In-Reply-To: <20220323023420.GC19041@ubuntu> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 23/03/2022 03:34, Jung Daehwan wrote: > On Tue, Mar 22, 2022 at 06:10:00PM +0100, Krzysztof Kozlowski wrote: >> On 21/03/2022 09:59, Daehwan Jung wrote: >>> This driver supports USB Audio offload with Co-processor. >> >> One do you need one more XHCI driver? How does it differ from existing >> and why existing cannot be extended? > > I have some exynos specific features and that's because need own driver. > It's not good to modify other XHCI driver for my features. > > Additinally, I've been developing some features with other IP or Co-Processors. > Extending is not enough to cover them and I think owning driver is also better > on structural view. This reason is not good enough because it's not visible that you cannot extend existing drivers. Best regards, Krzysztof