linux-kernel - Re: [PATCH] ASoC: simple-card: Fill in driver name

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Message-ID: <f7efde11-067d-8822-45fa-7cdbe2d17d93@perex.cz>
Date:   Mon, 11 Oct 2021 19:16:37 +0200
From:   Jaroslav Kysela <perex@...ex.cz>
To:     Diederik de Haas <didi.debian@...ow.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Thierry Reding <treding@...dia.com>,
        Jon Hunter <jonathanh@...dia.com>,
        Stephan Gerhold <stephan@...hold.net>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        Guido Günther <agx@...xcpu.org>
Subject: Re: [PATCH] ASoC: simple-card: Fill in driver name

On 10. 10. 21 12:40, Diederik de Haas wrote:
> On Sunday, 10 October 2021 10:40:09 CEST Jaroslav Kysela wrote:
>>> Unfortunately this change broke multichannel audio on my Rock64 device
>>> running Debian. My Rock64 is connected to my AVR (Pioneer SC-1224) via a
>>> HDMI cable.
>> This looks like an user space configuration problem.
> 
> I have placed ALSA card definitions (I think) from LibreELEC on my system from
> https://github.com/LibreELEC/LibreELEC.tv/tree/master/projects/Rockchip/
> filesystem/usr/share/alsa/cards

Apparently, the alsa-lib configuration is used in this case.

It seems that there are four sound cards (Analog/HDMI/I2S/SPDIF) created for 
your hardware. The alsa-lib configuration is a bit weird - an obfuscation for 
the simple-card driver use. The simple way to resolve this is to create a 
proper UCM configuration.

If you need further assistance, create an issue for alsa-lib or alsa-ucm-conf 
on github and with an output from the 'alsa-info.sh' script.

						Jaroslav

-- 
Jaroslav Kysela <perex@...ex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.