linux-kernel - Re: [PATCH v4 2/2] ASoC: qcom: SC7280: Add machine driver

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Date:   Tue, 2 Nov 2021 16:31:32 +0530
From:   Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
To:     Stephen Boyd <swboyd@...omium.org>, agross@...nel.org,
        alsa-devel@...a-project.org, bgoswami@...eaurora.org,
        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, plai@...eaurora.org,
        robh+dt@...nel.org, rohitkr@...eaurora.org,
        srinivas.kandagatla@...aro.org, tiwai@...e.com
Subject: Re: [PATCH v4 2/2] ASoC: qcom: SC7280: Add machine driver


On 10/30/2021 12:40 AM, Stephen Boyd wrote:
Thanks for our time Stephen!!!
> Quoting Srinivasa Rao Mandadapu (2021-10-29 08:04:36)
>> diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
>> index cc7c1de..d9ffcb7 100644
>> --- a/sound/soc/qcom/Kconfig
>> +++ b/sound/soc/qcom/Kconfig
>> @@ -152,4 +152,16 @@ config SND_SOC_SC7180
>>            SC7180 SoC-based systems.
>>            Say Y if you want to use audio device on this SoCs.
>>
>> +config SND_SOC_SC7280
>> +       tristate "SoC Machine driver for SC7280 boards"
>> +       depends on I2C && SOUNDWIRE
> Add || COMPILE_TEST so we can compile test this driver?
Okay. Will add it.
>
>> +       select SND_SOC_QCOM_COMMON
>> +       select SND_SOC_MAX98357A
>> +       select SND_SOC_LPASS_RX_MACRO
>> +       select SND_SOC_LPASS_TX_MACRO
>> +       help
>> +         To add support for audio on Qualcomm Technologies Inc.
> Drop "To"?
Okay.
>
>> +         SC7280 SoC-based systems.
>> +         Say Y if you want to use audio device on this SoCs.
>> +
>>   endif #SND_SOC_QCOM
>> diff --git a/sound/soc/qcom/sc7280.c b/sound/soc/qcom/sc7280.c
>> new file mode 100644
>> index 0000000..1d73b4f
>> --- /dev/null
>> +++ b/sound/soc/qcom/sc7280.c
>> @@ -0,0 +1,343 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +//
>> +// Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
>> +//
>> +// sc7280.c -- ALSA SoC Machine driver for sc7280
> Please remove filename from the comment as it's not useful and may
> change.
Okay.
>> +
>> +#include <linux/gpio.h>
> [...]
>> +
>> +static void sc7280_snd_shutdown(struct snd_pcm_substream *substream)
>> +{
>> +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
>> +       struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
>> +
>> +       switch (cpu_dai->id) {
>> +       case LPASS_CDC_DMA_RX0:
>> +       case LPASS_CDC_DMA_TX3:
>> +       case LPASS_CDC_DMA_VA_TX0:
>> +               break;
>> +       case MI2S_SECONDARY:
>> +               break;
>> +       case LPASS_DP_RX:
>> +               break;
>> +       default:
>> +               dev_err(rtd->dev, "%s: invalid dai id %d\n", __func__, cpu_dai->id);
>> +               break;
>> +       }
> The function doesn't do anything though. Why do we care?
Okay. will remove 'sc7280_snd_startup' and 'sc7280_snd_shutdown'.
>
>> +}
>> +
>> +static const struct snd_soc_ops sc7280_ops = {
>> +       .startup = sc7280_snd_startup,
>> +       .shutdown = sc7280_snd_shutdown,
>> +       .hw_params = sc7280_snd_hw_params,
>> +       .hw_free = sc7280_snd_hw_free,
>> +       .prepare = sc7280_snd_prepare,
>> +};
>> +
>> +static const struct snd_soc_dapm_widget sc7280_snd_widgets[] = {
>> +       SND_SOC_DAPM_HP("Headphone Jack", NULL),
>> +       SND_SOC_DAPM_MIC("Headset Mic", NULL),
>> +};
>> +
>> +static int sc7280_snd_platform_probe(struct platform_device *pdev)
>> +{
>> +       struct snd_soc_card *card;
>> +       struct sc7280_snd_data *data;
>> +       struct device *dev = &pdev->dev;
>> +       struct snd_soc_dai_link *link;
>> +       int ret, i;
>> +
>> +       data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
>> +       if (!data)
>> +               return -ENOMEM;
>> +
>> +       card = &data->card;
>> +       snd_soc_card_set_drvdata(card, data);
>> +
>> +       card->owner = THIS_MODULE;
>> +       card->driver_name = "SC7280";
>> +       card->dev = dev;
>> +
>> +       ret = qcom_snd_parse_of(card);
>> +       if (ret)
>> +               return ret;
>> +
>> +       for_each_card_prelinks(card, i, link) {
>> +               link->init = sc7280_init;
>> +               link->ops = &sc7280_ops;
>> +       }
>> +
>> +       return devm_snd_soc_register_card(dev, card);
>> +}
>> +
>> +static const struct of_device_id sc7280_snd_device_id[]  = {
>> +       {.compatible = "google,sc7280-herobrine"},
> Please add space after { and before }
Okay.
>> +       {}
>> +};
>> +MODULE_DEVICE_TABLE(of, sc7280_snd_device_id);

-- 
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