linux-kernel - Re: [PATCH] drm/rockchip: dsi: convert to dev_err

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Message-Id: <D5GWE4WJZMM8.1MPHPPQR2QW46@cknow.org>
Date: Fri, 08 Nov 2024 16:21:24 +0100
From: "Diederik de Haas" <didi.debian@...ow.org>
To: "Heiko Stuebner" <heiko@...ech.de>,
 <linux-rockchip@...ts.infradead.org>, <dri-devel@...ts.freedesktop.org>
Cc: <dsimic@...jaro.org>, <andy.yan@...k-chips.com>,
 <maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
 <tzimmermann@...e.de>, <linux-kernel@...r.kernel.org>, "Heiko Stuebner"
 <heiko.stuebner@...rry.de>
Subject: Re: [PATCH] drm/rockchip: dsi: convert to dev_err_probe in probe
 function

On Fri Nov 8, 2024 at 3:44 PM CET, Heiko Stuebner wrote:
> From: Heiko Stuebner <heiko.stuebner@...rry.de>
>
> DRM_DEV_ERROR is deprecated and using dev_err_probe saves quite a number
> of lines too, so convert the error prints for the dsi-driver.
>
> Signed-off-by: Heiko Stuebner <heiko.stuebner@...rry.de>

Should this have a Fixes tag?
Because in the PineTab2 case it reported an error, which was actually
just a deferred probe.

> ---
>  .../gpu/drm/rockchip/dw-mipi-dsi-rockchip.c   | 80 ++++++-------------
>  1 file changed, 26 insertions(+), 54 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> index 58a44af0e9ad..3224ab749352 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> ...
> @@ -1378,67 +1376,47 @@ static int dw_mipi_dsi_rockchip_probe(struct platform_device *pdev)
>  		i++;
>  	}
>  
> -	if (!dsi->cdata) {
> -		DRM_DEV_ERROR(dev, "no dsi-config for %s node\n", np->name);
> -		return -EINVAL;
> -	}
> +	if (!dsi->cdata)
> +		return dev_err_probe(dev, -EINVAL, "No dsi-config for %s node\n", np->name);
>  
>  	/* try to get a possible external dphy */
>  	dsi->phy = devm_phy_optional_get(dev, "dphy");
> -	if (IS_ERR(dsi->phy)) {
> -		ret = PTR_ERR(dsi->phy);
> -		DRM_DEV_ERROR(dev, "failed to get mipi dphy: %d\n", ret);
> -		return ret;
> -	}
> +	if (IS_ERR(dsi->phy))
> +		return dev_err_probe(dev, PTR_ERR(dsi->phy), "Failed to get mipi dphy\n");

I think from this line.

Cheers,
  Diederik

>  
>  	dsi->pclk = devm_clk_get(dev, "pclk");
> -	if (IS_ERR(dsi->pclk)) {
> -		ret = PTR_ERR(dsi->pclk);
> -		DRM_DEV_ERROR(dev, "Unable to get pclk: %d\n", ret);
> -		return ret;
> -	}
> +	if (IS_ERR(dsi->pclk))
> +		return dev_err_probe(dev, PTR_ERR(dsi->pclk), "Unable to get pclk\n");
>  
>  	dsi->pllref_clk = devm_clk_get(dev, "ref");
>  	if (IS_ERR(dsi->pllref_clk)) {
> -		if (dsi->phy) {
> +		if (dsi->phy)
>  			/*
>  			 * if external phy is present, pll will be
>  			 * generated there.
>  			 */
>  			dsi->pllref_clk = NULL;
> -		} else {
> -			ret = PTR_ERR(dsi->pllref_clk);
> -			DRM_DEV_ERROR(dev,
> -				      "Unable to get pll reference clock: %d\n",
> -				      ret);
> -			return ret;
> -		}
> +		else
> +			return dev_err_probe(dev, PTR_ERR(dsi->pllref_clk),
> +					     "Unable to get pll reference clock\n");
>  	}
>  
>  	if (dsi->cdata->flags & DW_MIPI_NEEDS_PHY_CFG_CLK) {
>  		dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
> -		if (IS_ERR(dsi->phy_cfg_clk)) {
> -			ret = PTR_ERR(dsi->phy_cfg_clk);
> -			DRM_DEV_ERROR(dev,
> -				      "Unable to get phy_cfg_clk: %d\n", ret);
> -			return ret;
> -		}
> +		if (IS_ERR(dsi->phy_cfg_clk))
> +			return dev_err_probe(dev, PTR_ERR(dsi->phy_cfg_clk),
> +					     "Unable to get phy_cfg_clk\n");
>  	}
>  
>  	if (dsi->cdata->flags & DW_MIPI_NEEDS_GRF_CLK) {
>  		dsi->grf_clk = devm_clk_get(dev, "grf");
> -		if (IS_ERR(dsi->grf_clk)) {
> -			ret = PTR_ERR(dsi->grf_clk);
> -			DRM_DEV_ERROR(dev, "Unable to get grf_clk: %d\n", ret);
> -			return ret;
> -		}
> +		if (IS_ERR(dsi->grf_clk))
> +			return dev_err_probe(dev, PTR_ERR(dsi->grf_clk), "Unable to get grf_clk\n");
>  	}
>  
>  	dsi->grf_regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
> -	if (IS_ERR(dsi->grf_regmap)) {
> -		DRM_DEV_ERROR(dev, "Unable to get rockchip,grf\n");
> -		return PTR_ERR(dsi->grf_regmap);
> -	}
> +	if (IS_ERR(dsi->grf_regmap))
> +		return dev_err_probe(dev, PTR_ERR(dsi->grf_regmap), "Unable to get rockchip,grf\n");
>  
>  	dsi->dev = dev;
>  	dsi->pdata.base = dsi->base;
> ...


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