linux-kernel - Re: [PATCH v2 1/9] drm/bridge: cdns-dsi: Fix OF node pointer

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Message-ID: <mgl6dxypfj6mwzdj3l3xsb63vctxyoa3y32vuykzrojv5fuevr@akvrnmgdqwyg>
Date: Thu, 30 May 2024 17:24:30 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Aradhya Bhatia <a-bhatia1@...com>
Cc: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>, 
	Andrzej Hajda <andrzej.hajda@...el.com>, Neil Armstrong <neil.armstrong@...aro.org>, 
	Robert Foss <rfoss@...nel.org>, Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
	Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
	Jyri Sarha <jyri.sarha@....fi>, Thomas Zimmermann <tzimmermann@...e.de>, 
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
	DRI Development List <dri-devel@...ts.freedesktop.org>, Linux Kernel List <linux-kernel@...r.kernel.org>, 
	Sam Ravnborg <sam@...nborg.org>, Thierry Reding <treding@...dia.com>, 
	Kieran Bingham <kieran.bingham+renesas@...asonboard.com>, Nishanth Menon <nm@...com>, 
	Vignesh Raghavendra <vigneshr@...com>, Praneeth Bajjuri <praneeth@...com>, Udit Kumar <u-kumar1@...com>, 
	Devarsh Thakkar <devarsht@...com>, Jayesh Choudhary <j-choudhary@...com>, 
	Jai Luthra <j-luthra@...com>
Subject: Re: [PATCH v2 1/9] drm/bridge: cdns-dsi: Fix OF node pointer

On Thu, May 30, 2024 at 03:06:13PM +0530, Aradhya Bhatia wrote:
> Fix the OF node pointer passed to the of_drm_find_bridge() call to find
> the next bridge in the display chain.

Please describe why, not what. In other words, please describe why you
have to pass np, no device's of_node.

> 
> Fixes: e19233955d9e ("drm/bridge: Add Cadence DSI driver")
> Signed-off-by: Aradhya Bhatia <a-bhatia1@...com>
> ---
>  drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
> index 7457d38622b0..b016f2ba06bb 100644
> --- a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
> +++ b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
> @@ -952,7 +952,7 @@ static int cdns_dsi_attach(struct mipi_dsi_host *host,
>  		bridge = drm_panel_bridge_add_typed(panel,
>  						    DRM_MODE_CONNECTOR_DSI);
>  	} else {
> -		bridge = of_drm_find_bridge(dev->dev.of_node);
> +		bridge = of_drm_find_bridge(np);
>  		if (!bridge)
>  			bridge = ERR_PTR(-EINVAL);
>  	}
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry