linux-kernel - Re: [PATCH v3 24/33] drm/mediatek: mtk_hdmi: Remove ifdef for CONFIG_PM

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Message-ID: <498667e57b24c754d87742854bfbedfc821931cf.camel@mediatek.com>
Date: Mon, 23 Dec 2024 06:35:36 +0000
From: CK Hu (胡俊光) <ck.hu@...iatek.com>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	"chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>
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	<mripard@...nel.org>, Jitao Shi (石记涛)
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	<junzhi.zhao@...iatek.com>
Subject: Re: [PATCH v3 24/33] drm/mediatek: mtk_hdmi: Remove ifdef for
 CONFIG_PM_SLEEP

Hi, Angelo:

On Tue, 2024-12-17 at 16:43 +0100, AngeloGioacchino Del Regno wrote:
> External email : Please do not click links or open attachments until you have verified the sender or the content.
> 
> 
> Since the SIMPLE_DEV_PM_OPS macro and the pm pointer are anyway
> defined when CONFIG_PM_SLEEP is not set, remove the ifdef for it
> and indicate that the mtk_hdmi_{remove,suspend} functions may be
> unused (as they are, in case PM support is not built-in).

I see many driver use CONFIG_PM_SLEEP,
and SIMPLE_DEV_PM_OPS() is defined to support suspend/resume function is not exist when CONFIG_PM_SLEEP is not defined,
so there is no strong purpose to apply this patch.

> 
> While at it, to improve readability, also compress the
> SIMPLE_DEV_PM_OPS declaration as it even fits in less
> than 80 columns.

You have many typesetting in some patches.
But I think typesetting is not related to the main purpose of that patch.
I would like you to gather these typesetting modification to a readability patch.

Regards,
CK

> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_hdmi.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> index 5d46d486c68f..7e4536391cfb 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> @@ -1694,8 +1694,7 @@ static void mtk_hdmi_remove(struct platform_device *pdev)
>         mtk_hdmi_clk_disable_audio(hdmi);
>  }
> 
> -#ifdef CONFIG_PM_SLEEP
> -static int mtk_hdmi_suspend(struct device *dev)
> +static __maybe_unused int mtk_hdmi_suspend(struct device *dev)
>  {
>         struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
> 
> @@ -1704,7 +1703,7 @@ static int mtk_hdmi_suspend(struct device *dev)
>         return 0;
>  }
> 
> -static int mtk_hdmi_resume(struct device *dev)
> +static __maybe_unused int mtk_hdmi_resume(struct device *dev)
>  {
>         struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
>         int ret = 0;
> @@ -1717,9 +1716,8 @@ static int mtk_hdmi_resume(struct device *dev)
> 
>         return 0;
>  }
> -#endif
> -static SIMPLE_DEV_PM_OPS(mtk_hdmi_pm_ops,
> -                        mtk_hdmi_suspend, mtk_hdmi_resume);
> +
> +static SIMPLE_DEV_PM_OPS(mtk_hdmi_pm_ops, mtk_hdmi_suspend, mtk_hdmi_resume);
> 
>  static const struct mtk_hdmi_conf mtk_hdmi_conf_mt2701 = {
>         .tz_disabled = true,
> --
> 2.47.0
>