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, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 7CFBEC433DB for ; Sun, 28 Mar 2021 01:18:14 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (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 B34AC6198D for ; Sun, 28 Mar 2021 01:18:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B34AC6198D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ict.e.titech.ac.jp Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=driverdev-devel-bounces@linuxdriverproject.org Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 7060A40166; Sun, 28 Mar 2021 01:18:13 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id w2CRzYCuWve6; Sun, 28 Mar 2021 01:18:12 +0000 (UTC) Received: from ash.osuosl.org (ash.osuosl.org [140.211.166.34]) by smtp2.osuosl.org (Postfix) with ESMTP id 6606640184; Sun, 28 Mar 2021 01:18:12 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by ash.osuosl.org (Postfix) with ESMTP id 05E801BF982 for ; Sun, 28 Mar 2021 01:18:11 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 0129B83942 for ; Sun, 28 Mar 2021 01:18:11 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pLhjCSyNWavH for ; Sun, 28 Mar 2021 01:18:09 +0000 (UTC) X-Greylist: delayed 00:28:16 by SQLgrey-1.8.0 Received: from mail001.nap.gsic.titech.ac.jp (mail001.nap.gsic.titech.ac.jp [131.112.13.101]) by smtp1.osuosl.org (Postfix) with SMTP id 6D0C483938 for ; Sun, 28 Mar 2021 01:18:09 +0000 (UTC) Received: from 172.22.40.203 by mail001.nap.gsic.titech.ac.jp with Mail2000 ESMTP Server V7.00(21086:0:AUTH_RELAY) (envelope-from ); Sun, 28 Mar 2021 09:49:00 +0900 (JST) Received: from mail003.nap.gsic.titech.ac.jp (mail003.nap.gsic.titech.ac.jp [131.112.13.103]) by drweb06.nap.gsic.titech.ac.jp (Postfix) with SMTP id 0D5B2EF; Sun, 28 Mar 2021 09:49:00 +0900 (JST) Received: from 153.240.174.134 by mail003.nap.gsic.titech.ac.jp with Mail2000 ESMTPA Server V7.00(2588:0:AUTH_LOGIN) (envelope-from ); Sun, 28 Mar 2021 09:48:59 +0900 (JST) Date: Sun, 28 Mar 2021 09:48:59 +0900 (JST) Message-Id: <20210328.094859.1841483083721098229.ryutaroh@ict.e.titech.ac.jp> To: stefan.wahren@i2se.com Subject: Re: Sound issues with the 5.10.x kernel (alsa) From: Ryutaroh Matsumoto In-Reply-To: References: <3165951.nLcn7dHqa8@bagend> X-Mailer: Mew version 6.8 on Emacs 26.3 Mime-Version: 1.0 X-BeenThere: driverdev-devel@linuxdriverproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Driver Project Developer List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devel@driverdev.osuosl.org, gregkh@linuxfoundation.org, 978025@bugs.debian.org, bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, didi.debian@cknow.org, 985928@bugs.debian.org, maxime@cerno.tech Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" Hi all, From: Stefan Wahren Subject: Re: Sound issues with the 5.10.x kernel (alsa) Date: Mon, 8 Feb 2021 13:22:56 +0100 >> This is basically me forwarding the bug I reported on Debian's BTS: >> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=978025 >> TL;DR: I have a RPi 3B+ running pure Debian Bullseye arm64 (~from >> raspi.debian.net), named rpi-mpd, connected via HDMI cable to my AV Receiver. > can you please confirm that the bcm2835-audio driver causing the issues? I think the root cause of this issue is that both vc4.ko and snd_bcm2835.ko try to provide ALSA sinks to HDMI audio outputs from RPi. Why do the two drivers provide the same functionality for the same device? It seems nonsense. There must be some coordination between vc4.ko and snd_bcm2835.ko on who provides ALSA sinks of RPi HDMI output. The non-coordination that both drivers provide different ALSA sinks of the same device already causes another symptom as http://lists.infradead.org/pipermail/linux-rpi-kernel/2021-March/008077.html Best regards, Ryutaroh Matsumoto _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel