linux-kernel - Re: [PATCH 1/3] ALSA: pcm: add snd_pcm_add_chmap_ctls_with

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Message-ID: <4823a770-f3c4-695f-5699-4c8d8179b507@linaro.org>
Date:   Sat, 6 May 2023 08:42:58 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     broonie@...nel.org, tiwai@...e.com, perex@...ex.cz,
        lgirdwood@...il.com, ckeepax@...nsource.cirrus.com,
        kuninori.morimoto.gx@...esas.com, linux-kernel@...r.kernel.org,
        pierre-louis.bossart@...ux.intel.com, alsa-devel@...a-project.org
Subject: Re: [PATCH 1/3] ALSA: pcm: add snd_pcm_add_chmap_ctls_with_prefix



On 06/05/2023 06:57, Takashi Iwai wrote:
> On Fri, 05 May 2023 18:55:12 +0200,
> Srinivas Kandagatla wrote:
>>
>> On Qualcomm SoC which has multiple Display Port controllers, using
>> snd_pcm_add_chmap_ctls() to add chmap controls from every ASoC hdmi codec
>> instance for a give card fails while adding second instance as the control
>> with same name "Playback Channel Map" already exists from the first instance.
>>
>> Fix this by adding a new api wrapper to pass ASoC component name prefix to
>> avoid such duplicate control naming.
> 
> It implies that you have conflicting PCM objects with the same PCM
> device number from the same card.  How can it be?
Thanks for the inputs, this is only issue with my local changes, Sorry 
for the noise, Please ignore this series.

I had some local changes to debug an issue around pcm device numbering 
with backend dailinks from device tree and frontend dailinks from tplg.
Will start a new thread to discuss this issue.

thanks,
srini
> 
> 
> Takashi