From patchwork Mon May 13 00:31:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuninori Morimoto X-Patchwork-Id: 13662943 Received: from TYVP286CU001.outbound.protection.outlook.com (mail-japaneastazon11010000.outbound.protection.outlook.com [52.101.229.0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CA4DE33F9 for ; Mon, 13 May 2024 00:31:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=52.101.229.0 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715560307; cv=fail; b=uylzN6tHELEtxAPsiKY2LcYKMcbUGxuSN2y/mmiqhlVveg7bBoYupyAhcm+Ozg7R9BL0+IDwit13sAyId7OylyifkcWWgRM7NPsTsLXtG/NgMh3jy6Nqai/lZsDzD/3idU+hZRKGSwrzclFm2L+kpbLnKOf1G0JkGZWFzOW4X78= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715560307; c=relaxed/simple; bh=UlHQyGTEM25XSr3p5+bW3CoQw0OnSzjELwKTZ0swvc4=; h=Message-ID:To:In-Reply-To:References:From:Subject:Content-Type: Date:MIME-Version; b=RD4CcI3NDu3W3LwNQXsYaf1Bn3JXr9ZzDQsv4O5CydQw6UqgWX2404ICdi7c/VPsVjWIzN1BC7GpqbTcHr5sRruMmWnFAd+QW+eFDgz49aVfFkqrRNF2Qa+80A2PkeQvkwwkslrvPZ6JEzVDuV8ID2vK0g2yB3TrzZrpXkWR8sw= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com; spf=pass smtp.mailfrom=renesas.com; dkim=pass (1024-bit key) header.d=renesas.com header.i=@renesas.com header.b=V4dYuym4; arc=fail smtp.client-ip=52.101.229.0 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=renesas.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=renesas.com header.i=@renesas.com header.b="V4dYuym4" ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=WrQzMKbsrx/aKYTYwiIR8x4oCANS2ueTEw35j0K84w5QoZ6CohgNnFIAXr1nCqwYJaaEf8GpUq8/vOs88uKYfwcO9RMYwi0VEmMYoFYDR4zlIIbKWCLh/F6n4KHhr38oP9y3HWaXKiYg6CqpPPaZ0bQqZI//Osi/q4DR7cYMlpJr70AkysqbvpX9MnmZy3BOCQA17GhH8pK2WOxaIN+ZQXr4rPn97lj/WX0LCE+7Z4b84KjmHZvQ0C9kfRnbDy6v87Wf6xWcxYFwesRs5hYjZjr5ZnTLShxs2/8BeZbWrmNDKz7bXEeIdrckHUEgyqWZGpearoAC6zk9bnChH2rm6w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=Wor7/TYJgKI18gNii8iNrsHIxBN6Y8ysM4fkY0I5Z34=; b=DQxUvRJFmsviBsNO6mNpVXeH2FMgBOvcStp7w4cF3vHiZ282VK+PQjqC2npFHBgaacfeRh4PKRPgwB6psdYs1Wz0iPb9AIniqFAn2e0glCFJoDWSKo5gMPb3wuSp77Y68YO6TXvlIJgTPI6jK526nnuiQe0daB6Aa8hToSpIWPZmFUwwXNHX3d7Dr9GvQUSBd7iCaqv7z/l/RZ3vXukv4ZHFOkJvPqbERwgFlKxcyiYnMQY+QpcfI5N2am9sBf/6M8bO/AD6M3XKtcl8uy1Q+Cdai+rJqUEehahY/rJGKWtlWECiq9kbDpo5V0iDqWfGfI9G4cyj7fRfUgWRNeFmFw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=renesas.com; dmarc=pass action=none header.from=renesas.com; dkim=pass header.d=renesas.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=renesas.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Wor7/TYJgKI18gNii8iNrsHIxBN6Y8ysM4fkY0I5Z34=; b=V4dYuym4NjwJWIF9LKAIK45SXcC0jIt72TBo+v1PNqgzKadPZWvTpWpNiGjyNngA0za2cX8qrEgLrAqGRWUPo5ALuU9uHRb7O1DZGslkYcFkjRMF/QaQ0nvnaPw9Wpd05jEZzCIEixAQhA6xrB9o5mLLGvn68UlTShwvemQxfW4= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=renesas.com; Received: from TY3PR01MB10906.jpnprd01.prod.outlook.com (2603:1096:400:3af::14) by OS3PR01MB7383.jpnprd01.prod.outlook.com (2603:1096:604:14a::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7544.55; Mon, 13 May 2024 00:31:42 +0000 Received: from TY3PR01MB10906.jpnprd01.prod.outlook.com ([fe80::592:9b7b:ef57:2dd8]) by TY3PR01MB10906.jpnprd01.prod.outlook.com ([fe80::592:9b7b:ef57:2dd8%4]) with mapi id 15.20.7544.052; Mon, 13 May 2024 00:31:42 +0000 Message-ID: <87msouzh5e.wl-kuninori.morimoto.gx@renesas.com> To: =?iso-8859-2?q?=22Amadeusz_S=B3awi=F1ski=22?= , Alexandre Belloni , Alper Nebi Yasak , AngeloGioacchino Del Regno , Banajit Goswami , Bard Liao , Brent Lu , Cezary Rojewski , Charles Keepax , Claudiu Beznea , Cristian Ciocaltea , Daniel Baluta , Hans de Goede , Jaroslav Kysela , Jerome Brunet , Jiawei Wang , Jonathan Corbet , Kai Vehmanen , Kevin Hilman , Liam Girdwood , Mark Brown , Maso Huang , Matthias Brugger , Neil Armstrong , Nicolas Ferre , Peter Ujfalusi , Pierre-Louis Bossart , Ranjani Sridharan , Sascha Hauer , Shawn Guo , Shengjiu Wang , Srinivas Kandagatla , Sylwester Nawrocki , Takashi Iwai , Vinod Koul , Xiubo Li , alsa-devel@alsa-project.org, imx@lists.linux.dev, linux-doc@vger.kernel.org, linux-sound@vger.kernel.org In-Reply-To: <87o79azh65.wl-kuninori.morimoto.gx@renesas.com> References: <87o79azh65.wl-kuninori.morimoto.gx@renesas.com> From: Kuninori Morimoto Subject: [PATCH v2 1/3] ASoC: soc-pcm: Indicate warning if dpcm_playback/capture were used for availability limition User-Agent: Wanderlust/2.15.9 Emacs/27.1 Mule/6.0 Date: Mon, 13 May 2024 00:31:41 +0000 X-ClientProxiedBy: TY2PR01CA0012.jpnprd01.prod.outlook.com (2603:1096:404:a::24) To TY3PR01MB10906.jpnprd01.prod.outlook.com (2603:1096:400:3af::14) Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: TY3PR01MB10906:EE_|OS3PR01MB7383:EE_ X-MS-Office365-Filtering-Correlation-Id: ead90118-5c88-4a12-4f62-08dc72e40f9e X-LD-Processed: 53d82571-da19-47e4-9cb4-625a166a4a2a,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230031|376005|7416005|52116005|366007|1800799015|921011|38350700005; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:TY3PR01MB10906.jpnprd01.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(376005)(7416005)(52116005)(366007)(1800799015)(921011)(38350700005);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: renesas.com X-MS-Exchange-CrossTenant-Network-Message-Id: ead90118-5c88-4a12-4f62-08dc72e40f9e X-MS-Exchange-CrossTenant-AuthSource: TY3PR01MB10906.jpnprd01.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 May 2024 00:31:42.0678 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 53d82571-da19-47e4-9cb4-625a166a4a2a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: KIK+byGFdr54IC8Y7wiRtWmpusDHVN0asR20qXxUMF93kklelOvHq7z3rU/EKvVtk4ogGpOh0651rN6fVXTPMIDsMfLxp3xYL1kB9lfTYooW/d4uK2UWjO2hBLW2Q5jb X-MS-Exchange-Transport-CrossTenantHeadersStamped: OS3PR01MB7383 I have been wondering why DPCM needs special flag (= dpcm_playback/capture) to use it. Below is the history why it was added to ASoC. (A) In beginning, there was no dpcm_xxx flag on ASoC. It checks channels_min for DPCM, same as current non-DPCM. Let's name it as "validation check" here. if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { if (cpu_dai->driver->playback.channels_min) playback = 1; if (cpu_dai->driver->capture.channels_min) capture = 1; (B) commit 1e9de42f4324 ("ASoC: dpcm: Explicitly set BE DAI link supported stream directions") force to use dpcm_xxx flag on DPCM. According to this commit log, this is because "Some BE dummy DAI doesn't set channels_min for playback/capture". But we don't know which DAI is it, and not know why it can't/don't have channels_min. Let's name it as "no_chan_DAI" here. According to the code and git-log, it is used as DCPM-BE and is CPU DAI. I think the correct solution was set channels_min on "no_chan_DAI" side, not update ASoC framework side. But everything is under smoke today. if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { playback = rtd->dai_link->dpcm_playback; capture = rtd->dai_link->dpcm_capture; (C) commit 9b5db059366a ("ASoC: soc-pcm: dpcm: Only allow playback/capture if supported") checks channels_min (= validation check) again. Because DPCM availability was handled by dpcm_xxx flag at that time, but some Sound Card set it even though it wasn't available. Clearly there's a contradiction here. I think correct solution was update Sound Card side instead of ASoC framework. Sound Card side will be updated to handle this issue later (commit 25612477d20b ("ASoC: soc-dai: set dai_link dpcm_ flags with a helper")) if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { ... playback = rtd->dai_link->dpcm_playback && snd_soc_dai_stream_valid(cpu_dai, ...); capture = rtd->dai_link->dpcm_capture && snd_soc_dai_stream_valid(cpu_dai, ...); This (C) patch should have broken "no_chan_DAI" which doesn't have channels_min, but there was no such report during this 4 years. Possibilities case are as follows - No one is using "no_chan_DAI" - "no_chan_DAI" is no longer exist : was removed ? - "no_chan_DAI" is no longer exist : has channels_min ? Because of these history, this dpcm_xxx is unneeded flag today. But because we have been used it for 10 years since (B), it may have been used differently. For example some DAI available both playback/capture, but it set dpcm_playback flag only, in this case dpcm_xxx flag is used as availability limitation. We can use playback_only flag instead in this case, but it is very difficult to find such DAI today. Let's add grace time to remove dpcm_playback/capture flag. This patch don't use dpcm_xxx flag anymore, and indicates warning to use xxx_only flag if both playback/capture were available but using only one of dpcm_xxx flag, and not using xxx_only flag. Link: https://lore.kernel.org/r/87edaym2cg.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Kuninori Morimoto --- include/sound/soc.h | 1 + sound/soc/soc-pcm.c | 65 ++++++++++++++++++++++++++------------------- 2 files changed, 38 insertions(+), 28 deletions(-) diff --git a/include/sound/soc.h b/include/sound/soc.h index 33671437ee89..2a3da1d91377 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -815,6 +815,7 @@ struct snd_soc_dai_link { /* This DAI link can route to other DAI links at runtime (Frontend)*/ unsigned int dynamic:1; + /* REMOVE ME */ /* DPCM capture and Playback support */ unsigned int dpcm_capture:1; unsigned int dpcm_playback:1; diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index 711b2f49ed88..c4d80cad5982 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -2795,6 +2795,7 @@ static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, { struct snd_soc_dai_link *dai_link = rtd->dai_link; struct snd_soc_dai *cpu_dai; + struct snd_soc_dai_link_ch_map *ch_maps; int has_playback = 0; int has_capture = 0; int i; @@ -2805,43 +2806,51 @@ static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, } if (dai_link->dynamic || dai_link->no_pcm) { - int stream; - if (dai_link->dpcm_playback) { - stream = SNDRV_PCM_STREAM_PLAYBACK; + for_each_rtd_ch_maps(rtd, i, ch_maps) { + cpu_dai = snd_soc_rtd_to_cpu(rtd, ch_maps->cpu); - for_each_rtd_cpu_dais(rtd, i, cpu_dai) { - if (snd_soc_dai_stream_valid(cpu_dai, stream)) { - has_playback = 1; - break; - } - } - if (!has_playback) { - dev_err(rtd->card->dev, - "No CPU DAIs support playback for stream %s\n", - dai_link->stream_name); - return -EINVAL; - } + if (snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK)) + has_playback = 1; + + if (snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE)) + has_capture = 1; } - if (dai_link->dpcm_capture) { - stream = SNDRV_PCM_STREAM_CAPTURE; - for_each_rtd_cpu_dais(rtd, i, cpu_dai) { - if (snd_soc_dai_stream_valid(cpu_dai, stream)) { - has_capture = 1; - break; - } + /* + * REMOVE ME + * + * dpcm_xxx flag will be removed soon, Indicates warning if dpcm_xxx flag was used + * as availability limition + */ + if (has_playback && has_capture) { + if ( dai_link->dpcm_playback && + !dai_link->dpcm_capture && + !dai_link->playback_only) { + dev_warn(rtd->card->dev, + "both playback/capture are available," + " but not using playback_only flag (%s)\n", + dai_link->stream_name); + dev_warn(rtd->card->dev, + "dpcm_playback/capture are no longer needed," + " please use playback/capture_only instead\n"); + has_capture = 0; } - if (!has_capture) { - dev_err(rtd->card->dev, - "No CPU DAIs support capture for stream %s\n", - dai_link->stream_name); - return -EINVAL; + if (!dai_link->dpcm_playback && + dai_link->dpcm_capture && + !dai_link->capture_only) { + dev_warn(rtd->card->dev, + "both playback/capture are available," + " but not using capture_only flag (%s)\n", + dai_link->stream_name); + dev_warn(rtd->card->dev, + "dpcm_playback/capture are no longer needed," + " please use playback/capture_only instead\n"); + has_playback = 0; } } } else { - struct snd_soc_dai_link_ch_map *ch_maps; struct snd_soc_dai *codec_dai; /* Adapt stream for codec2codec links */