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Date:   Sun, 10 Oct 2021 10:40:09 +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 9:47, Diederik de Haas wrote:
> On Tuesday, 22 June 2021 10:27:09 CEST Guido Günther wrote:
>> alsa-ucm groups by driver name so fill that in as well. Otherwise the
>> presented information is redundant and doesn't reflect the used
>> driver. We can't just use 'asoc-simple-card' since the driver name is
>> restricted to 15 characters.
>>
>> Before:
>>
>>   # cat /proc/asound/cards
>>   0 [Devkit         ]: Librem_5_Devkit - Librem 5 Devkit
>>                        Librem 5 Devkit
>> After:
>>
>>   0 [Devkit         ]: simple-card - Librem 5 Devkit
>>                        Librem 5 Devkit
>>
>> Signed-off-by: Guido Günther <agx@...xcpu.org>
>> ---
>> This came out of a discussion about adding alsa-ucm profiles for the
>> Librem 5 Devkit at https://github.com/alsa-project/alsa-ucm-conf/pull/102
>>
>>   sound/soc/generic/simple-card.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/sound/soc/generic/simple-card.c
>> b/sound/soc/generic/simple-card.c index 0015f534d42d..a3a7990b5cb6 100644
>> --- a/sound/soc/generic/simple-card.c
>> +++ b/sound/soc/generic/simple-card.c
>> @@ -621,6 +621,7 @@ static int asoc_simple_probe(struct platform_device
>> *pdev) card->owner		= THIS_MODULE;
>>   	card->dev		= dev;
>>   	card->probe		= simple_soc_probe;
>> +	card->driver_name       = "simple-card";
>>
>>   	li = devm_kzalloc(dev, sizeof(*li), GFP_KERNEL);
>>   	if (!li)
> 
> 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. You should check, if a PA 
profile or an UCM configuration is used (in the PA debug log).

						Jaroslav

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

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