linux-kernel - Re: [PATCH v6 3/7] ASoC: fsl-asoc-card: Support new property fsl,asrc-format

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Date:   Mon, 6 Apr 2020 15:59:49 -0700
From:   Nicolin Chen <nicoleotsuka@...il.com>
To:     Shengjiu Wang <shengjiu.wang@....com>
Cc:     timur@...nel.org, Xiubo.Lee@...il.com, festevam@...il.com,
        broonie@...nel.org, alsa-devel@...a-project.org,
        lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.com,
        robh+dt@...nel.org, mark.rutland@....com,
        devicetree@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 3/7] ASoC: fsl-asoc-card: Support new property
 fsl,asrc-format

On Wed, Apr 01, 2020 at 04:45:36PM +0800, Shengjiu Wang wrote:
> In order to align with new ESARC, we add new property fsl,asrc-format.
> The fsl,asrc-format can replace the fsl,asrc-width, driver
> can accept format from devicetree, don't need to convert it to
> format through width.
> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>

Acked-by: Nicolin Chen <nicoleotsuka@...il.com>

> ---
>  sound/soc/fsl/fsl-asoc-card.c | 21 ++++++++++++---------
>  1 file changed, 12 insertions(+), 9 deletions(-)
> 
> diff --git a/sound/soc/fsl/fsl-asoc-card.c b/sound/soc/fsl/fsl-asoc-card.c
> index bb33601fab84..a0f5eb27d61a 100644
> --- a/sound/soc/fsl/fsl-asoc-card.c
> +++ b/sound/soc/fsl/fsl-asoc-card.c
> @@ -680,17 +680,20 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
>  			goto asrc_fail;
>  		}
>  
> -		ret = of_property_read_u32(asrc_np, "fsl,asrc-width", &width);
> +		ret = of_property_read_u32(asrc_np, "fsl,asrc-format", &priv->asrc_format);
>  		if (ret) {
> -			dev_err(&pdev->dev, "failed to get output rate\n");
> -			ret = -EINVAL;
> -			goto asrc_fail;
> -		}
> +			/* Fallback to old binding; translate to asrc_format */
> +			ret = of_property_read_u32(asrc_np, "fsl,asrc-width", &width);
> +			if (ret) {
> +				dev_err(&pdev->dev, "failed to get output width\n");

Should warn 'format' over 'width', since it's preferable.

> +				return ret;

Should goto asrc_fail as we did prior to the change.

And some of lines are over 80 characters.

Let's try this:
		ret = of_property_read_u32(asrc_np, "fsl,asrc-format",
					   &priv->asrc_format);
		if (ret) {
			/* Fallback to old binding; translate to asrc_format */
			ret = of_property_read_u32(asrc_np, "fsl,asrc-width",
						   &width);
			if (ret) {
				dev_err(&pdev->dev,
					"failed to decide output format\n");
				goto asrc_fail;
			}

			if (width == 24)
				priv->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
			else
				priv->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
		}