linux-kernel - Re: [PATCH 3/4] media: nxp: imx8-isi: use devm_pm_runtime

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Message-ID: <20251119042412.GN10711@pendragon.ideasonboard.com>
Date: Wed, 19 Nov 2025 13:24:12 +0900
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Frank Li <Frank.Li@....com>
Cc: Philipp Zabel <p.zabel@...gutronix.de>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Rui Miguel Silva <rmfrfs@...il.com>,
	Martin Kepplinger-Novakovic <martink@...teo.de>,
	Purism Kernel Team <kernel@...i.sm>, linux-media@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] media: nxp: imx8-isi: use devm_pm_runtime_enable()
 to simplify code

On Mon, Nov 17, 2025 at 01:58:13PM -0500, Frank Li wrote:
> Use devm_pm_runtime_enable() to simplify code. Change to use
> dev_err_probe() because previous goto change to return.
> 
> No functional change.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c | 16 +++++++---------
>  1 file changed, 7 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c b/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c
> index c3d411ddf492eb27b372763ce5d344a90c6ec524..a884976ac8f8295120c404941f7ee19b90723924 100644
> --- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c
> +++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c
> @@ -499,13 +499,14 @@ static int mxc_isi_probe(struct platform_device *pdev)
>  	dma_size = isi->pdata->has_36bit_dma ? 36 : 32;
>  	dma_set_mask_and_coherent(dev, DMA_BIT_MASK(dma_size));
>  
> -	pm_runtime_enable(dev);
> +	ret = devm_pm_runtime_enable(dev);
> +	if (ret)
> +		return ret;
>  
>  	ret = mxc_isi_crossbar_init(isi);
> -	if (ret) {
> -		dev_err(dev, "Failed to initialize crossbar: %d\n", ret);
> -		goto err_pm;
> -	}
> +	if (ret)
> +		return dev_err_probe(dev, ret,
> +				     "Failed to initialize crossbar: %d\n", ret);

No need to print the error value anymore.

>  
>  	for (i = 0; i < isi->pdata->num_channels; ++i) {
>  		ret = mxc_isi_pipe_init(isi, i);
> @@ -528,8 +529,7 @@ static int mxc_isi_probe(struct platform_device *pdev)
>  
>  err_xbar:
>  	mxc_isi_crossbar_cleanup(&isi->crossbar);
> -err_pm:
> -	pm_runtime_disable(isi->dev);
> +
>  	return ret;
>  }
>  
> @@ -548,8 +548,6 @@ static void mxc_isi_remove(struct platform_device *pdev)
>  
>  	mxc_isi_crossbar_cleanup(&isi->crossbar);
>  	mxc_isi_v4l2_cleanup(isi);
> -
> -	pm_runtime_disable(isi->dev);
>  }
>  
>  static const struct of_device_id mxc_isi_of_match[] = {
> 
> -- 
> 2.34.1
> 

-- 
Regards,

Laurent Pinchart