Re: [PATCH] drm/rockchip: dsi: convert to dev_err_probe in probe function

["Heiko Stübner" <heiko@sntech.de>]

Am Freitag, 8. November 2024, 16:21:24 CET schrieb Diederik de Haas:
> On Fri Nov 8, 2024 at 3:44 PM CET, Heiko Stuebner wrote:
> > From: Heiko Stuebner <heiko.stuebner@cherry.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@cherry.de>
> 
> Should this have a Fixes tag?
> Because in the PineTab2 case it reported an error, which was actually
> just a deferred probe.

A deferred-probe is an error ;-)   -517 in fact  ... just that convention
nowadays is to not actively report on it but "fail" silently.

So personally I don't really consider it a fix, but more a style thing.
I guess I'll let others chime in for that.


Heiko

> 
> > ---
> >  .../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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