linux-kernel - Re: [PATCH v2 1/1] drm: lcdif: Use dev_err

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Message-ID: <3410946.mvXUDI8C0e@steina-w>
Date: Thu, 13 Nov 2025 11:47:13 +0100
From: Alexander Stein <alexander.stein@...tq-group.com>
To: Marek Vasut <marex@...x.de>, Stefan Agner <stefan@...er.ch>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>
Cc: dri-devel@...ts.freedesktop.org, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Liu Ying <victor.liu@....com>, Marco Felsch <m.felsch@...gutronix.de>
Subject: Re: [PATCH v2 1/1] drm: lcdif: Use dev_err_probe()

Hi,

Am Montag, 20. Oktober 2025, 11:58:45 CET schrieb Alexander Stein:
> Use dev_err_probe() to add a reason for deferred probe. This can
> especially happen on lcdif3 which uses hdmi_tx_phy for 'pix' clock
> 
> Reviewed-by: Liu Ying <victor.liu@....com>
> Reviewed-by: Marco Felsch <m.felsch@...gutronix.de>
> Signed-off-by: Alexander Stein <alexander.stein@...tq-group.com>

Any other feedback?

Thanks and best regards
Alexander
> ---
> Changes in v2:
> * Collected Liu's and Marcos' R-b
> 
>  drivers/gpu/drm/mxsfb/lcdif_drv.c | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mxsfb/lcdif_drv.c b/drivers/gpu/drm/mxsfb/lcdif_drv.c
> index fcb2a7517377e..47da1d9336b90 100644
> --- a/drivers/gpu/drm/mxsfb/lcdif_drv.c
> +++ b/drivers/gpu/drm/mxsfb/lcdif_drv.c
> @@ -149,15 +149,17 @@ static int lcdif_load(struct drm_device *drm)
>  
>  	lcdif->clk = devm_clk_get(drm->dev, "pix");
>  	if (IS_ERR(lcdif->clk))
> -		return PTR_ERR(lcdif->clk);
> +		return dev_err_probe(drm->dev, PTR_ERR(lcdif->clk), "Failed to get pix clock\n");
>  
>  	lcdif->clk_axi = devm_clk_get(drm->dev, "axi");
>  	if (IS_ERR(lcdif->clk_axi))
> -		return PTR_ERR(lcdif->clk_axi);
> +		return dev_err_probe(drm->dev, PTR_ERR(lcdif->clk_axi),
> +				     "Failed to get axi clock\n");
>  
>  	lcdif->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");
>  	if (IS_ERR(lcdif->clk_disp_axi))
> -		return PTR_ERR(lcdif->clk_disp_axi);
> +		return dev_err_probe(drm->dev, PTR_ERR(lcdif->clk_disp_axi),
> +				     "Failed to get disp_axi clock\n");
>  
>  	platform_set_drvdata(pdev, drm);
>  
> 


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