linux-kernel - Re: [PATCH 1/2] drm/rockchip: dsi: Perform trivial code cleanups

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Message-ID: <3734f6a5424e3537d717c587a058fc85@manjaro.org>
Date: Fri, 08 Nov 2024 15:05:02 +0100
From: Dragan Simic <dsimic@...jaro.org>
To: Heiko Stübner <heiko@...ech.de>
Cc: linux-rockchip@...ts.infradead.org, dri-devel@...ts.freedesktop.org,
 hjc@...k-chips.com, andy.yan@...k-chips.com,
 maarten.lankhorst@...ux.intel.com, mripard@...nel.org, tzimmermann@...e.de,
 airlied@...il.com, simona@...ll.ch, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] drm/rockchip: dsi: Perform trivial code cleanups

Hello Heiko,

On 2024-11-08 14:56, Heiko Stübner wrote:
> Am Freitag, 8. November 2024, 14:53:57 CET schrieb Dragan Simic:
>> Perform a few trivial code cleanups, to make one logged message a bit 
>> more
>> consistent with the other logged messages by capitalizing its first 
>> word, and
>> to avoid line wrapping by using the 100-column width better.
>> 
>> No intended functional changes are introduced by these code cleanups.
>> 
>> Signed-off-by: Dragan Simic <dsimic@...jaro.org>
>> ---
>>  drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 12 ++++--------
>>  1 file changed, 4 insertions(+), 8 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..f451e70efbdd 100644
>> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
>> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
>> @@ -1379,7 +1379,7 @@ static int dw_mipi_dsi_rockchip_probe(struct 
>> platform_device *pdev)
>>  	}
>> 
>>  	if (!dsi->cdata) {
>> -		DRM_DEV_ERROR(dev, "no dsi-config for %s node\n", np->name);
>> +		DRM_DEV_ERROR(dev, "No dsi-config for %s node\n", np->name);
> 
> this is all probe-related, why not convert to dev_err_probe?
> 
> As the doc states [0], DRM_DEV_ERROR is deprecated in favor of dev_err.
> So dev_err_probe would be the correct way to go?

Thanks for your quick response!  Seeing that DRM_DEV_ERROR() is now
deprecated (which I originally missed, in all honesty) makes me very
happy. :)  I've never been a huge fan of the format of the messages
that DRM_DEV_ERROR() produces.

However, perhaps it would be better to keep these patches as-is, as
some kind of an intermediate, limited-scope cleanup + bugfix combo,
and leave the complete DRM_DEV_ERROR() --> dev_err()/dev_err_probe()
conversion to separate patches.  I think it would be better to avoid
a partial conversion, and I'll be more than happy to put the complete
conversion on my TODO list. :)

> [0] 
> https://elixir.bootlin.com/linux/v6.11.6/source/include/drm/drm_print.h#L431
> 
>>  		return -EINVAL;
>>  	}
>> 
>> @@ -1408,19 +1408,16 @@ static int dw_mipi_dsi_rockchip_probe(struct 
>> platform_device *pdev)
>>  			dsi->pllref_clk = NULL;
>>  		} else {
>>  			ret = PTR_ERR(dsi->pllref_clk);
>> -			DRM_DEV_ERROR(dev,
>> -				      "Unable to get pll reference clock: %d\n",
>> -				      ret);
>> +			DRM_DEV_ERROR(dev, "Unable to get pll reference clock: %d\n", 
>> ret);
>>  			return ret;
>>  		}
>>  	}
>> 
>>  	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);
>> +			DRM_DEV_ERROR(dev, "Unable to get phy_cfg_clk: %d\n", ret);
>>  			return ret;
>>  		}
>>  	}
>> @@ -1465,8 +1462,7 @@ static int dw_mipi_dsi_rockchip_probe(struct 
>> platform_device *pdev)
>>  	if (IS_ERR(dsi->dmd)) {
>>  		ret = PTR_ERR(dsi->dmd);
>>  		if (ret != -EPROBE_DEFER)
>> -			DRM_DEV_ERROR(dev,
>> -				      "Failed to probe dw_mipi_dsi: %d\n", ret);
>> +			DRM_DEV_ERROR(dev, "Failed to probe dw_mipi_dsi: %d\n", ret);
>>  		return ret;
>>  	}
>> 
>>