linux-kernel - Re: [PATCH v2 05/18] media: rzg2l-cru: csi2: Use devm_pm_runtime

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Message-ID: <CA+V-a8uxOuf-9_3TLhFkz0TxNk50fmieJcGOCyxOFY3Mzedy2g@mail.gmail.com>
Date: Sun, 23 Feb 2025 21:13:11 +0000
From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
Cc: tomm.merciai@...il.com, linux-renesas-soc@...r.kernel.org, 
	linux-media@...r.kernel.org, biju.das.jz@...renesas.com, 
	prabhakar.mahadev-lad.rj@...renesas.com, 
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>, 
	Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Geert Uytterhoeven <geert+renesas@...der.be>, Magnus Damm <magnus.damm@...il.com>, 
	Hans Verkuil <hverkuil@...all.nl>, Uwe Kleine-König <u.kleine-koenig@...libre.com>, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 05/18] media: rzg2l-cru: csi2: Use devm_pm_runtime_enable()

On Fri, Feb 21, 2025 at 4:05 PM Tommaso Merciai
<tommaso.merciai.xr@...renesas.com> wrote:
>
> Use newly added devm_pm_runtime_enable() into rzg2l_csi2_probe() and
> drop error path accordingly. Drop also unnecessary pm_runtime_disable()
> from rzg2l_csi2_remove().
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
> Reviewed-by: Biju Das <biju.das.jz@...renesas.com>
> Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
> ---
> Changes since v1:
>  - Collected tags
>
>  drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c | 11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)
>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Cheers,
Prabhakar

> diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
> index 948f1917b830..4ccf7c5ea58b 100644
> --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
> +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
> @@ -805,11 +805,13 @@ static int rzg2l_csi2_probe(struct platform_device *pdev)
>         if (ret)
>                 return ret;
>
> -       pm_runtime_enable(dev);
> +       ret = devm_pm_runtime_enable(dev);
> +       if (ret)
> +               return ret;
>
>         ret = rzg2l_validate_csi2_lanes(csi2);
>         if (ret)
> -               goto error_pm;
> +               return ret;
>
>         csi2->subdev.dev = dev;
>         v4l2_subdev_init(&csi2->subdev, &rzg2l_csi2_subdev_ops);
> @@ -834,7 +836,7 @@ static int rzg2l_csi2_probe(struct platform_device *pdev)
>         ret = media_entity_pads_init(&csi2->subdev.entity, ARRAY_SIZE(csi2->pads),
>                                      csi2->pads);
>         if (ret)
> -               goto error_pm;
> +               return ret;
>
>         ret = v4l2_subdev_init_finalize(&csi2->subdev);
>         if (ret < 0)
> @@ -852,8 +854,6 @@ static int rzg2l_csi2_probe(struct platform_device *pdev)
>         v4l2_async_nf_unregister(&csi2->notifier);
>         v4l2_async_nf_cleanup(&csi2->notifier);
>         media_entity_cleanup(&csi2->subdev.entity);
> -error_pm:
> -       pm_runtime_disable(dev);
>
>         return ret;
>  }
> @@ -867,7 +867,6 @@ static void rzg2l_csi2_remove(struct platform_device *pdev)
>         v4l2_async_unregister_subdev(&csi2->subdev);
>         v4l2_subdev_cleanup(&csi2->subdev);
>         media_entity_cleanup(&csi2->subdev.entity);
> -       pm_runtime_disable(&pdev->dev);
>  }
>
>  static int rzg2l_csi2_pm_runtime_suspend(struct device *dev)
> --
> 2.34.1
>
>