linux-kernel - Re: [PATCH] ASoC: qcom: SC7280: Update machine driver startup, shutdown callbacks

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Message-ID: <102ad140-dc26-d266-a716-4e22003ec601@linaro.org>
Date:   Tue, 19 Apr 2022 10:19:45 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>,
        agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
        broonie@...nel.org, robh+dt@...nel.org, quic_plai@...cinc.com,
        bgoswami@...cinc.com, perex@...ex.cz, tiwai@...e.com,
        quic_rohkumar@...cinc.com, linux-arm-msm@...r.kernel.org,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, swboyd@...omium.org,
        judyhsiao@...omium.org
Cc:     Venkata Prasad Potturu <quic_potturu@...cinc.com>
Subject: Re: [PATCH] ASoC: qcom: SC7280: Update machine driver startup,
 shutdown callbacks



On 19/04/2022 08:16, Srinivasa Rao Mandadapu wrote:
> Update machine driver startup, shutdown callback functions to support
> codec DMA paths. Without this change, platforms with WCD codec is failing
> to register sound card.
> 
> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
> Co-developed-by: Venkata Prasad Potturu <quic_potturu@...cinc.com>
> Signed-off-by: Venkata Prasad Potturu <quic_potturu@...cinc.com>
> ---
>   sound/soc/qcom/sc7280.c | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
> diff --git a/sound/soc/qcom/sc7280.c b/sound/soc/qcom/sc7280.c
> index 4ef4034..d64df11 100644
> --- a/sound/soc/qcom/sc7280.c
> +++ b/sound/soc/qcom/sc7280.c
> @@ -295,6 +295,10 @@ static void sc7280_snd_shutdown(struct snd_pcm_substream *substream)
>   		break;
>   	case LPASS_DP_RX:
>   		break;
> +	case LPASS_CDC_DMA_RX0 ... LPASS_CDC_DMA_RX9:
> +	case LPASS_CDC_DMA_TX0 ... LPASS_CDC_DMA_TX8:
> +	case LPASS_CDC_DMA_VA_TX0 ... LPASS_CDC_DMA_VA_TX8:
> +		break;
>   	default:
>   		dev_err(rtd->dev, "%s: invalid dai id 0x%x\n", __func__,
>   			cpu_dai->id);

Why not just make sc7280_snd_startup code like this:

static int sc7280_snd_startup(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);
	int ret = 0;

	switch (cpu_dai->id) {
	case MI2S_PRIMARY:
		ret = sc7280_rt5682_init(rtd);
		break;
	default:
		break;
	}
	return ret;
}

and sc7280_snd_shutdown with something similar

--srini
> @@ -316,6 +320,10 @@ static int sc7280_snd_startup(struct snd_pcm_substream *substream)
>   		break;
>   	case LPASS_DP_RX:
>   		break;
> +	case LPASS_CDC_DMA_RX0 ... LPASS_CDC_DMA_RX9:
> +	case LPASS_CDC_DMA_TX0 ... LPASS_CDC_DMA_TX8:
> +	case LPASS_CDC_DMA_VA_TX0 ... LPASS_CDC_DMA_VA_TX8:
> +		break;
>   	default:
>   		dev_err(rtd->dev, "%s: invalid dai id 0x%x\n", __func__,
>   			cpu_dai->id);