Re: [PATCH v20 22/41] ASoC: usb: Add PCM format check API for USB backend

[Amadeusz Sławiński <amadeuszx.slawinski@xxxxxxxxxxxxxxx>]

On 4/25/2024 11:51 PM, Wesley Cheng wrote:
> Introduce a helper to check if a particular PCM format is supported by the
> USB audio device connected.  If the USB audio device does not have an
> audio profile which can support the requested format, then notify the USB
> backend.
>
> Signed-off-by: Wesley Cheng <quic_wcheng@xxxxxxxxxxx>
> ---

(...)

> +/**
> + * snd_soc_usb_find_format() - Check if audio format is supported
> + * @card_idx: USB sound chip array index
> + * @params: PCM parameters
> + * @direction: capture or playback
> + *
> + * Ensure that a requested audio profile from the ASoC side is able to be
> + * supported by the USB device.
> + *
> + * Return 0 on success, negative on error.
> + *
> + */
> +int snd_soc_usb_find_format(int card_idx, struct snd_pcm_hw_params *params,
> +			int direction)

Perhaps name function similar to its snd_usb equivalent, so 
snd_soc_usb_find_supported_format?

> +{
> +	struct snd_usb_stream *as;
> +
> +	as = snd_usb_find_suppported_substream(card_idx, params, direction);
> +	if (!as)
> +		return -EOPNOTSUPP;
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(snd_soc_usb_find_format);
> +
>   /**
>    * snd_soc_usb_allocate_port() - allocate a SOC USB device
>    * @component: USB DPCM backend DAI component