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=-3.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,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 7111AC433B4 for ; Mon, 19 Apr 2021 23:54:37 +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 65FA66127C for ; Mon, 19 Apr 2021 23:54:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 65FA66127C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=renesas.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 006DF1678; Tue, 20 Apr 2021 01:53:42 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 006DF1678 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1618876473; bh=o7fe9KQB9zf6cAzZcfno4u1bKDehPwJxplg2igO2skA=; h=Date:From:To:Subject:Cc:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From; b=VSDXg9eEW2oHVROULKKR+EixAPsK8/m1/ZZd0/hkIhX1huTnc3DS0Wj+ToFJu2KMl EF4yHM1ypUUOY+tRi3F5KsYifpm2n07eqBRVPGJomljt3HBtabmMCethRMTkECdlkE LkJ306qKdIci7B+Tbx+GGUgA4JbgP51HzrVzi09w= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 45365F8019B; Tue, 20 Apr 2021 01:53:42 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 3CAF7F80227; Tue, 20 Apr 2021 01:53:40 +0200 (CEST) Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by alsa1.perex.cz (Postfix) with ESMTP id D84B9F8014D for ; Tue, 20 Apr 2021 01:53:32 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz D84B9F8014D Date: 20 Apr 2021 08:53:29 +0900 X-IronPort-AV: E=Sophos;i="5.82,235,1613401200"; d="scan'208";a="78579564" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 20 Apr 2021 08:53:29 +0900 Received: from mercury.renesas.com (unknown [10.166.252.133]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 6F791400940B; Tue, 20 Apr 2021 08:53:29 +0900 (JST) Message-ID: <87fszl4yrq.wl-kuninori.morimoto.gx@renesas.com> From: Kuninori Morimoto To: Mark Brown Subject: Question about soc_pcm_pointer() User-Agent: Wanderlust/2.15.9 Emacs/26.3 Mule/6.0 MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII Cc: Linux-ALSA 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" Hi ALSA ML I noticed that current soc-pcm.c :: soc_pcm_pointer() is adding both CPU-DAI's max delay (= A) and Codec-DAI's max delay (= B). static snd_pcm_uframes_t soc_pcm_pointer(...) { ... ^ for_each_rtd_cpu_dais(rtd, i, cpu_dai) (A) cpu_delay = max(cpu_delay, ...); v delay += cpu_delay; ^ for_each_rtd_codec_dais(rtd, i, codec_dai) (B) codec_delay = max(codec_delay, ...); v delay += codec_delay; runtime->delay = delay; ... } But I guess All-DAI's max delay is very enough for it. What do you think ? Thank you for your help !! Best regards --- Kuninori Morimoto