> +/**
> + * 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;
> +}
Presumably there's a notification to help applications discard this
information on removal?
