linux-kernel - Re: [PATCH v21 33/39] ASoC: usb: Fetch ASoC sound card information

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Date: Tue, 7 May 2024 16:33:11 -0500
From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To: Wesley Cheng <quic_wcheng@...cinc.com>, srinivas.kandagatla@...aro.org,
 mathias.nyman@...el.com, perex@...ex.cz, conor+dt@...nel.org,
 corbet@....net, lgirdwood@...il.com, andersson@...nel.org,
 krzk+dt@...nel.org, gregkh@...uxfoundation.org, Thinh.Nguyen@...opsys.com,
 broonie@...nel.org, bgoswami@...cinc.com, tiwai@...e.com,
 bagasdotme@...il.com, robh@...nel.org, konrad.dybcio@...aro.org
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
 linux-sound@...r.kernel.org, linux-usb@...r.kernel.org,
 linux-arm-msm@...r.kernel.org, linux-doc@...r.kernel.org,
 alsa-devel@...a-project.org
Subject: Re: [PATCH v21 33/39] ASoC: usb: Fetch ASoC sound card information


> +/**
> + * snd_soc_usb_device_offload_available() - Fetch BE DAI link sound card
> + * @dev: the device to find in SOC USB
> + *
> + * Finds the component linked to a specific SOC USB instance, and returns
> + * the sound card number for the platform card supporting offloading.
> + *
> + */
> +int snd_soc_usb_device_offload_available(struct device *dev)
> +{
> +	struct snd_soc_usb *ctx;
> +
> +	ctx = snd_soc_find_usb_ctx(dev);
> +	if (!ctx)
> +		return -ENODEV;
> +
> +	return ctx->component->card->snd_card->number;
> +}

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