linux-kernel - Re: [PATCH v2] ASoC: qcom: soundwire: Add support for controlling audio CGCR from HLOS

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Date:   Tue, 24 May 2022 16:19:47 +0530
From:   Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
To:     Stephen Boyd <swboyd@...omium.org>, <agross@...nel.org>,
        <alsa-devel@...a-project.org>, <bgoswami@...cinc.com>,
        <bjorn.andersson@...aro.org>, <broonie@...nel.org>,
        <devicetree@...r.kernel.org>, <judyhsiao@...omium.org>,
        <lgirdwood@...il.com>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <perex@...ex.cz>,
        <quic_plai@...cinc.com>, <quic_rohkumar@...cinc.com>,
        <robh+dt@...nel.org>, <srinivas.kandagatla@...aro.org>,
        <tiwai@...e.com>, <vkoul@...nel.org>
Subject: Re: [PATCH v2] ASoC: qcom: soundwire: Add support for controlling
 audio CGCR from HLOS


On 5/21/2022 8:43 AM, Stephen Boyd wrote:
Thanks for your time Stephen!!!
> Quoting Srinivasa Rao Mandadapu (2022-05-18 05:42:35)
>> diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
>> index da1ad7e..445e481 100644
>> --- a/drivers/soundwire/qcom.c
>> +++ b/drivers/soundwire/qcom.c
>> @@ -1333,6 +1337,10 @@ static int qcom_swrm_probe(struct platform_device *pdev)
>>          ctrl->bus.compute_params = &qcom_swrm_compute_params;
>>          ctrl->bus.clk_stop_timeout = 300;
>>
>> +       ctrl->audio_cgcr = devm_reset_control_get_exclusive(dev, "swr_audio_cgcr");
>> +       if (IS_ERR(ctrl->audio_cgcr))
>> +               dev_err(dev, "Failed to get audio_cgcr reset required for soundwire-v1.6.0\n");
> Why is there no return on error here? Is the reset optional?
Yes it's optional. For older platforms this is not required.
>
>> +
>>          ret = qcom_swrm_get_port_config(ctrl);
>>          if (ret)
>>                  goto err_clk;