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 X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B36AC47094 for ; Thu, 10 Jun 2021 10:03:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2DA6E61184 for ; Thu, 10 Jun 2021 10:03:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230103AbhFJKFm (ORCPT ); Thu, 10 Jun 2021 06:05:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:45728 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229937AbhFJKFl (ORCPT ); Thu, 10 Jun 2021 06:05:41 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B32E561184; Thu, 10 Jun 2021 10:03:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1623319413; bh=P+4fvz19UNgFMuHYNnQV49m2+gIWnRhS7jOvbkcZJN8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=KrvsjIRCSAcWUhGHZsaQxWkkek9ie2X9+zA6p3hyUTMVzhA1niySok8zBDqE7JoWR fPnfSMYxipx7db9LIEXNXMfOoR6gRQuU7zy0rw+rmWznVSgfEV0dEhmmH3//DcqTrm 2HyNRRXTByBPhEyOuxejokiKFA3AcaDMa7jpvbis= Date: Thu, 10 Jun 2021 12:03:30 +0200 From: Greg KH To: Felipe Balbi Cc: Wesley Cheng , agross@kernel.org, bjorn.andersson@linaro.org, robh+dt@kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, jackp@codeaurora.org, Thinh.Nguyen@synopsys.com Subject: Re: [PATCH v9 0/5] Re-introduce TX FIFO resize for larger EP bursting Message-ID: References: <1621410561-32762-1-git-send-email-wcheng@codeaurora.org> <87k0n9btnb.fsf@kernel.org> <874ke62i0v.fsf@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <874ke62i0v.fsf@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On Thu, Jun 10, 2021 at 12:20:00PM +0300, Felipe Balbi wrote: > > As mentioned above, these changes are currently present on end user > > devices for the past few years, so its been through a lot of testing :). > > all with the same gadget driver. Also, who uses USB on android devices > these days? Most of the data transfer goes via WiFi or Bluetooth, anyway > :-) I used to think that too, until I saw some of the new crazy designs where lots of SoC connections internally to the device run on USB. Also look at the USB offload stuff as one example of how the voice sound path goes through the USB controller on the SoC on the latest Samsung Galaxy phones that are shipping now :( There's also devices with the modem/network connection going over USB, along with other device types as well. Android Auto is crazy with almost everything hooked up directly with a USB connection to the host system running Linux. > I guess only developers are using USB during development to flash dev > images heh. I wish, we are reaching the point where the stability of the overall Android system depends on how well the USB controller works. We are a product of our success... thanks, greg k-h