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=-2.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 5656DC10DCE for ; Thu, 12 Mar 2020 13:10:43 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D68E72067C for ; Thu, 12 Mar 2020 13:10:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="fikNe51x" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D68E72067C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 0A06716EB; Thu, 12 Mar 2020 14:09:51 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 0A06716EB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1584018641; bh=orZpIQ4Pw3GsTUIWEYKlPTxlZgWerPNUyhIfN0dN0/c=; h=Date:From:To:Subject:References:In-Reply-To:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=fikNe51xPmRPjPbn8127EosSNDYvQCIZX8dKInLmOgdVLiqL6ezeNn8DJf4YxqyBI plGPqucIl+qbocGXw4rwhvL2rwBQaXcrO9HJwpFYnpYIeTRgyYNELHJrocYMOTlfK9 1xcisPgDSMnWstKJLw8GZHnMaPJcT+FjZgOVxrEU= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 8A0CDF8020C; Thu, 12 Mar 2020 14:09:48 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 2D89CF8020C; Thu, 12 Mar 2020 14:09:46 +0100 (CET) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 179FCF80086; Thu, 12 Mar 2020 14:09:41 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 179FCF80086 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Mar 2020 06:09:38 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,544,1574150400"; d="scan'208";a="236826279" Received: from gliakhov-mobl2.ger.corp.intel.com (HELO ubuntu) ([10.249.40.3]) by orsmga008.jf.intel.com with ESMTP; 12 Mar 2020 06:09:36 -0700 Date: Thu, 12 Mar 2020 14:09:34 +0100 From: Guennadi Liakhovetski To: Mark Brown Subject: Re: [PATCH 0/3] [RESEND] ASoC: SOF: preparatory patches Message-ID: <20200312130933.GD15167@ubuntu> References: <20200309170749.32313-1-guennadi.liakhovetski@linux.intel.com> <9cfc4182-1f22-9f28-52d8-f8aac1f7bc0b@linux.intel.com> <20200310125055.GF4106@sirena.org.uk> <20200312114536.GA15167@ubuntu> <20200312121549.GB4038@sirena.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200312121549.GB4038@sirena.org.uk> User-Agent: Mutt/1.10.1 (2018-07-13) Cc: Liam Girdwood , Takashi Iwai , alsa-devel@alsa-project.org, Pierre-Louis Bossart , sound-open-firmware@alsa-project.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" On Thu, Mar 12, 2020 at 12:15:49PM +0000, Mark Brown wrote: > On Thu, Mar 12, 2020 at 12:45:37PM +0100, Guennadi Liakhovetski wrote: > > On Tue, Mar 10, 2020 at 12:50:56PM +0000, Mark Brown wrote: > > > > How does this relate to the virtio audio spec that's currently under > > > review? > > > The spec under discussion is only for simple audio virtualisation with fixed > > roles and topologies. With our approach guests get access to advanced DSP > > capabilities. The virtualisation approach under discussion can be a fallback > > for cases when no DSP has been detected on the host. > > So they're orthogonal :/ Have you proposed your spec yet? > > > > It looks to be doing something much lower level than that. > > > I am concerned that this looks to be exposing DPCM as a virtio ABI, > > > we're trying to replace it as an internal API never mind ABI. > > > You mean that our approach works at the widget level, which is a part of the > > DPCM API? Well there is a translation layer between our ABI and DPCM. And by > > virtue of the same argument don't we already have DPCM as an ABI on the > > opposite side of SOF - in its IPC ABI? Largely this virtualisation approach > > doesn't add new interfaces, it re-uses the SOF IPC ABI, which is also one of > > its advantages. > > Please bear in mind that the page you linked to is very high level and > I've not seen the actual spec or anything. The page and your mails both > talk about DPCM so it sounds like that's a part of the interface. Let me rebase my current stack and post it here, stay tuned :-) Thanks Guennadi