linux-kernel - Re: [PATCH v6 24/42] drm/mediatek: mtk_hdmi: Use dev_err_probe() in mtk_hdmi_dt_parse

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Message-ID: <9eb0630216e07d2167ab63471c532ba0d92597cd.camel@mediatek.com>
Date: Thu, 13 Feb 2025 07:34:12 +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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Subject: Re: [PATCH v6 24/42] drm/mediatek: mtk_hdmi: Use dev_err_probe() in
 mtk_hdmi_dt_parse_pdata()

On Tue, 2025-02-11 at 12:33 +0100, AngeloGioacchino Del Regno wrote:
> External email : Please do not click links or open attachments until you have verified the sender or the content.
> 
> 
> Change error prints to use dev_err_probe() instead of dev_err()
> where possible in function mtk_hdmi_dt_parse_pdata(), used only
> during device probe.
> While at it, also beautify some prints.

Reviewed-by: CK Hu <ck.hu@...iatek.com>

> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_hdmi.c | 31 ++++++++++-------------------
>  1 file changed, 10 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> index 65e9629b6b77..6140b55c2830 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> @@ -1372,25 +1372,19 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
>  {
>         struct device *dev = &pdev->dev;
>         struct device_node *np = dev->of_node;
> -       struct device_node *cec_np, *remote, *i2c_np;
> +       struct device_node *remote, *i2c_np;
>         struct platform_device *cec_pdev;
>         struct regmap *regmap;
>         int ret;
> 
>         ret = mtk_hdmi_get_all_clk(hdmi, np);
> -       if (ret) {
> -               if (ret != -EPROBE_DEFER)
> -                       dev_err(dev, "Failed to get clocks: %d\n", ret);
> -
> -               return ret;
> -       }
> +       if (ret)
> +               return dev_err_probe(dev, ret, "Failed to get clocks\n");
> 
>         /* The CEC module handles HDMI hotplug detection */
>         cec_np = of_get_compatible_child(np->parent, "mediatek,mt8173-cec");
> -       if (!cec_np) {
> -               dev_err(dev, "Failed to find CEC node\n");
> -               return -EINVAL;
> -       }
> +       if (!cec_np)
> +               return dev_err_probe(dev, -EINVAL, "Failed to find CEC node\n");
> 
>         cec_pdev = of_find_device_by_node(cec_np);
>         if (!cec_pdev) {
> @@ -1413,9 +1407,8 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
>         if (IS_ERR(regmap))
>                 ret = PTR_ERR(regmap);
>         if (ret) {
> -               dev_err(dev,
> -                       "Failed to get system configuration registers: %d\n",
> -                       ret);
> +               dev_err_probe(dev, ret,
> +                             "Failed to get system configuration registers\n");
>                 goto put_device;
>         }
>         hdmi->sys_regmap = regmap;
> @@ -1443,20 +1436,16 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
>         }
> 
>         i2c_np = of_parse_phandle(remote, "ddc-i2c-bus", 0);
> +       of_node_put(remote);
>         if (!i2c_np) {
> -               dev_err(dev, "Failed to find ddc-i2c-bus node in %pOF\n",
> -                       remote);
> -               of_node_put(remote);
> -               ret = -EINVAL;
> +               ret = dev_err_probe(dev, -EINVAL, "No ddc-i2c-bus in connector\n");
>                 goto put_device;
>         }
> -       of_node_put(remote);
> 
>         hdmi->ddc_adpt = of_find_i2c_adapter_by_node(i2c_np);
>         of_node_put(i2c_np);
>         if (!hdmi->ddc_adpt) {
> -               dev_err(dev, "Failed to get ddc i2c adapter by node\n");
> -               ret = -EINVAL;
> +               ret = dev_err_probe(dev, -EINVAL, "Failed to get ddc i2c adapter by node\n");
>                 goto put_device;
>         }
> 
> --
> 2.48.1
>