linux-kernel - Re: [PATCH] dt-bindings: lcdif: Add support for specifying display with timings

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Message-ID: <20240924225714.GA441530-robh@kernel.org>
Date: Tue, 24 Sep 2024 17:57:14 -0500
From: Rob Herring <robh@...nel.org>
To: Marek Vasut <marex@...x.de>
Cc: Lukasz Majewski <lukma@...x.de>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Stefan Agner <stefan@...er.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Fabio Estevam <festevam@...il.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: lcdif: Add support for specifying display
 with timings

On Mon, Sep 23, 2024 at 07:53:57PM +0200, Marek Vasut wrote:
> On 9/23/24 3:57 PM, Lukasz Majewski wrote:
> > Up till now the fsl,lcdif.yaml was requiring the "port" property as a
> > must have to specify the display interface on iMX devices.
> > 
> > However, it shall also be possible to specify the display only with
> > passing its timing parameters (h* and v* ones) via "display" property:
> > (as in
> > Documentation/devicetree/bindings/display/panel/display-timings.yaml).
> 
> Timings should go into panel node, not into scanout engine node.
> 
> See e.g. panel-timings in arch/arm64/boot/dts/freescale/imx8mm-phg.dts , in
> your case the compatible might be "panel-dpi" .

I agree, but if this is already in use, we should allow it. We can mark 
it deprecated though.

Rob