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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 37CF8C2D0DA for ; Thu, 26 Dec 2019 10:03:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 06FFF20838 for ; Thu, 26 Dec 2019 10:03:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726506AbfLZKDz (ORCPT ); Thu, 26 Dec 2019 05:03:55 -0500 Received: from mx2.suse.de ([195.135.220.15]:47758 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726023AbfLZKDz (ORCPT ); Thu, 26 Dec 2019 05:03:55 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id CBFFFAC68; Thu, 26 Dec 2019 10:03:53 +0000 (UTC) Date: Thu, 26 Dec 2019 11:03:53 +0100 Message-ID: From: Takashi Iwai To: Paul Menzel Cc: Jaroslav Kysela , Takashi Sakamoto , Takashi Iwai , , Linux Kernel Mailing List , Subject: Re: [Regression drm-tip] Internal audio device missing In-Reply-To: <6aa4e167-abb0-6a2c-c00e-558aa79d94be@molgen.mpg.de> References: <6aa4e167-abb0-6a2c-c00e-558aa79d94be@molgen.mpg.de> 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 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 26 Dec 2019 10:47:18 +0100, Paul Menzel wrote: > > Dear Linux folks, > > > With > > $ git describe --tags drm-tip/drm-tip > v5.5-rc3-1481-ga20d8cd6901a > > the internal audio device is not available, and just a dummy device. > > Running `alsa-info.sh` [1], the messages below are shown with the > problematic Linux kernel. > > alsactl: get_controls:567: snd_ctl_open error: Sound protocol is > not compatible > cat: /tmp/alsa-info.ateDlDjrZX/alsactl.tmp: No such file or directory That's an unexpected side-effect of the recent protocol version bump in sound.git for-next branch. It seems that we can't change the minor version unless we really want to break something. Below is the fix patch. Please give it a try. thanks, Takashi -- 8< -- From: Takashi Iwai Subject: [PATCH] ALSA: control: Fix incompatible protocol error The recent change to bump the ALSA control API protocol version from 2.0.7 to 2.1.0 caused a regression on user-space; while the user-space expects both the major and the minor versions to be identical with the supported numbers, we changed the minor number from 0 to 1. For recovering from the incompatibility, this patch changes the protocol version again to 2.0.8, which is compatible, but yet higher than the original number 2.0.7, indicating that the protocol change. Fixes: bd3eb4e87eb3 ("ALSA: ctl: bump protocol version up to v2.1.0") Reported-by: Paul Menzel Signed-off-by: Takashi Iwai --- include/uapi/sound/asound.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h index e36dadaf84ba..30ebb2a42983 100644 --- a/include/uapi/sound/asound.h +++ b/include/uapi/sound/asound.h @@ -936,7 +936,7 @@ struct snd_timer_tread { * * ****************************************************************************/ -#define SNDRV_CTL_VERSION SNDRV_PROTOCOL_VERSION(2, 1, 0) +#define SNDRV_CTL_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 8) struct snd_ctl_card_info { int card; /* card number */ -- 2.16.4