linux-kernel - [RFC] ASoC: soc-core: proposal to remove num_auto_selectable_formats from snd_soc_dai

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Message-ID: <2daa603f-13fe-c803-17fc-4fdd8e5723ba@gmail.com>
Date: Fri, 31 Oct 2025 10:26:02 +0530 (IST)
From: HariKrishna Sagala <hariconscious@...il.com>
To: lgirdwood@...il.com, broonie@...nel.org, perex@...ex.cz, tiwai@...e.com, 
    kuninori.morimoto.gx@...esas.com
cc: shuah@...nel.org, david.hunter.linux@...il.com, 
    linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC] ASoC: soc-core: proposal to remove num_auto_selectable_formats
 from snd_soc_dai_ops

Hi,

Good day.
I’d like to propose a small cleanup and simplification in the
snd_soc_dai_ops structure by removing the
"num_auto_selectable_formats" parameter.

Context:
Currently,snd_soc_dai_ops includes the "num_auto_selectable_formats"
field to indicate the number of entries in the "auto_selectable_formats"
array.However, this count can be derived programmatically using the
ARRAY_SIZE() macro wherever needed.

Proposal:
Remove the "num_auto_selectable_formats" field from the
snd_soc_dai_ops structure.Replace usage references to this field with
ARRAY_SIZE(auto_selectable_formats) in the relevant code paths.

One effect I see is if the parameter "auto_selectable_formats" has
only one priority format because few codecs are defined as a u64
variable,will correct and prepare a patch.

Please provide suggestions, objections and also to consider any
compatibility problems,historic importance of same.

If there are no objections, I would like to prepare a patch for
the same.

Thanks.

Regards,
HariKrishna.