linux-kernel - Re: [PATCH v6 10/33] ASoC: qcom: qdsp6: Add USB backend ASoC driver for Q6

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Date:   Sat, 16 Sep 2023 02:34:17 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Wesley Cheng <quic_wcheng@...cinc.com>, mathias.nyman@...el.com,
        gregkh@...uxfoundation.org, lgirdwood@...il.com,
        broonie@...nel.org, perex@...ex.cz, tiwai@...e.com,
        agross@...nel.org, andersson@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        srinivas.kandagatla@...aro.org, bgoswami@...cinc.com,
        Thinh.Nguyen@...opsys.com
Cc:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        alsa-devel@...a-project.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v6 10/33] ASoC: qcom: qdsp6: Add USB backend ASoC driver
 for Q6

On 16.09.2023 02:10, Wesley Cheng wrote:
> Create a USB BE component that will register a new USB port to the ASoC USB
> framework.  This will handle determination on if the requested audio
> profile is supported by the USB device currently selected.
> 
> Signed-off-by: Wesley Cheng <quic_wcheng@...cinc.com>
> ---
[...]

> +	ret = of_parse_phandle_with_fixed_args(node, "iommus", 1, 0, &args);
> +	if (ret < 0)
> +		data->priv.sid = -1;
> +	else
> +		data->priv.sid = args.args[0] & SID_MASK;
SID masking is done in the devicetree.

Konrad