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Message-ID: <1951ecfe-d080-464c-8441-f5400f535495@ideasonboard.com>
Date: Thu, 7 Aug 2025 16:21:14 +0300
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Louis Chauvet <louis.chauvet@...tlin.com>
Cc: thomas.petazzoni@...tlin.com, Jyri Sarha <jsarha@...com>,
 Tomi Valkeinen <tomi.valkeinen@...com>, dri-devel@...ts.freedesktop.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, stable@...r.kernel.org,
 Jyri Sarha <jyri.sarha@....fi>,
 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>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Sam Ravnborg <sam@...nborg.org>,
 Benoit Parrot <bparrot@...com>, Lee Jones <lee@...nel.org>,
 Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
 Tero Kristo <kristo@...nel.org>
Subject: Re: [PATCH 0/4] drm/tidss: Fixes data edge sampling

Hi,

On 30/07/2025 20:02, Louis Chauvet wrote:
> Currently the driver only configure the data edge sampling partially. The 
> AM62 require it to be configured in two distincts registers: one in tidss 
> and one in the general device registers.
> 
> Introduce a new dt property to link the proper syscon node from the main 
> device registers into the tidss driver.
> 
> Fixes: 32a1795f57ee ("drm/tidss: New driver for TI Keystone platform Display SubSystem")
> ---
> Cc: stable@...r.kernel.org
> 
> Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>

I understand why you call this a fix, but I think this is not really a
fix. From looking at the patches, my understanding is that for DPI
outputs we have always only supported certain clock/data edge. So this
series is adding a new feature to the driver.

You can add new things to the DT bindings, but you have to keep the old
bindings working.

 Tomi


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