linux-kernel - Re: [PATCH v8 01/13] drm/bridge: cdns-dsi: Fix connecting to next bridge

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Message-ID: <6ie36b5hcrgteo2gh2ievnyw2lsnfr3nhsbxu6ymthmc7lzfvs@3zbaf6flye2t>
Date: Sun, 26 Jan 2025 23:48:03 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Aradhya Bhatia <aradhya.bhatia@...ux.dev>
Cc: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>, 
	Laurent Pinchart <laurent.pinchart@...asonboard.com>, Andrzej Hajda <andrzej.hajda@...el.com>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, Jonas Karlman <jonas@...boo.se>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, 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>, Nishanth Menon <nm@...com>, 
	Vignesh Raghavendra <vigneshr@...com>, Devarsh Thakkar <devarsht@...com>, 
	Praneeth Bajjuri <praneeth@...com>, Udit Kumar <u-kumar1@...com>, 
	Jayesh Choudhary <j-choudhary@...com>, DRI Development List <dri-devel@...ts.freedesktop.org>, 
	Linux Kernel List <linux-kernel@...r.kernel.org>, Stable List <stable@...r.kernel.org>
Subject: Re: [PATCH v8 01/13] drm/bridge: cdns-dsi: Fix connecting to next
 bridge

On Mon, Jan 27, 2025 at 12:45:39AM +0530, Aradhya Bhatia wrote:
> From: Aradhya Bhatia <a-bhatia1@...com>
> 
> Fix the OF node pointer passed to the of_drm_find_bridge() call to find
> the next bridge in the display chain.
> 
> The code to find the next panel (and create its panel-bridge) works
> fine, but to find the next (non-panel) bridge does not.
> 
> To find the next bridge in the pipeline, we need to pass "np" - the OF
> node pointer of the next entity in the devicetree chain. Passing
> "of_node" to of_drm_find_bridge (which is what the code does currently)
> will fetch the bridge for the cdns-dsi which is not what's required.
> 
> Fix that.
> 
> Fixes: e19233955d9e ("drm/bridge: Add Cadence DSI driver")
> Cc: Stable List <stable@...r.kernel.org>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> 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(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

-- 
With best wishes
Dmitry