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=-8.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 720F5C47087 for ; Fri, 28 May 2021 09:08:51 +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 01F616127A for ; Fri, 28 May 2021 09:08:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 01F616127A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de 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 B685816DD; Fri, 28 May 2021 11:07:57 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz B685816DD DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1622192927; bh=5BwycEk8xpoPqdwbsJjP9pnQuS+y71IQbDxqkGf9iRw=; h=Date:From:To:Subject:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=VntHp9/LfOUDf7N3GuToO8QJOcWbCPjn2F5QAgZ4kemHfWP0u7DC8dvOUJ0+oJBoW QM9cq4oUjy4j7LuwQ/rmd7Y3cFGrN2cH3aD1CiyRC5wQtgWLWoqBRkBd7gnJC20hJv 8N/hrvLkpwWvAufGEy/epW1KXizez2nYyeZm5EzA= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 2D83DF80260; Fri, 28 May 2021 11:07:57 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 6CD44F80264; Fri, 28 May 2021 11:07:55 +0200 (CEST) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 9AF63F800B7 for ; Fri, 28 May 2021 11:07:49 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 9AF63F800B7 Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="Bf4ZMf/d"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="X7aFiKaP" X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1622192868; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=i9Sm3e3UEhnMmdfjdSvOKOhlSKnM8t2zGvdxUXB9kes=; b=Bf4ZMf/dd78FbmU8O4WTGauWsysU8z7JwnCw/PymGC9go7oeN+EUdmc+QRH52nxqBwExZH nfpTHlWtd/lbKtpazgTux/5tjFtCEjUBB+K+fP0l01llZVziGd5BILwunRlMPm0G18kM0X 1KCpcpdsgxODotdRYs9c5PszILWAFyM= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1622192868; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=i9Sm3e3UEhnMmdfjdSvOKOhlSKnM8t2zGvdxUXB9kes=; b=X7aFiKaPEmM7HFfEwg+i1Z0GtdcuZDQupsIenR0TGgbbL9u+DigAGRUourEKS/J6VNkd9n I/5bIIQ2lw+tVrBQ== Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id BA9DDB25F; Fri, 28 May 2021 09:07:48 +0000 (UTC) Date: Fri, 28 May 2021 11:07:48 +0200 Message-ID: From: Takashi Iwai To: Takashi Sakamoto Subject: Re: [PATCH] ALSA: firewire-lib: support NO_PERIOD_WAKEUP in ALSA PCM runtime In-Reply-To: <20210527123253.174315-1-o-takashi@sakamocchi.jp> References: <20210527123253.174315-1-o-takashi@sakamocchi.jp> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 Emacs/25.3 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Cc: alsa-devel@alsa-project.org, clemens@ladisch.de 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, 27 May 2021 14:32:53 +0200, Takashi Sakamoto wrote: > > Drivers of ALSA firewire stack can process packets for IT/IR context in > process context when the process operates ALSA PCM character device by > calling ioctl(2) with some requests. The ioctl requests are: > > * SNDRV_PCM_IOCTL_HWSYNC > * SNDRV_PCM_IOCTL_SYNC_PTR > * SNDRV_PCM_IOCTL_REWIND > * SNDRV_PCM_IOCTL_FORWARD > * SNDRV_PCM_IOCTL_WRITEI_FRAMES > * SNDRV_PCM_IOCTL_READI_FRAMES > * SNDRV_PCM_IOCTL_WRITEN_FRAMES > * SNDRV_PCM_IOCTL_READN_FRAMES > > This means that general application can process PCM frames apart from > hardware IRQ invocation, even if they are programmed by either IRQ-based > scheduling model or Timer-based scheduling model. > > This commit add support for Timer-based scheduling model by allowing > PCM runtime to suppress both process wakeup per period and scheduling > hardware IRQ. > > SNDRV_PCM_INFO_BATCH is obsoleted since ALSA IEC 61883-1/6 packet streaming > engine can report the number of transferred PCM frames within PCM period > boundary. The granularity equals to SYT_INTERVAL in blocking transmission. > In non-blocking transmission, it doesn't equal to SYT_INTERVAL but doesn't > exceed. > > This patch is tested with PulseAudio, and --sched-model option of axfer > with fix against the issue reported at: > > * https://lore.kernel.org/alsa-devel/687f9871-7484-1370-04d1-9c968e86f72b@linux.intel.com/#r > > Signed-off-by: Takashi Sakamoto Thanks, applied. Takashi