linux-kernel - Re: [PATCH 1/3] dt-bindings: arm: mediatek: mmsys: Allow single vdo/mmsys endpoint

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Message-ID: <20260113225346.GA367211-robh@kernel.org>
Date: Tue, 13 Jan 2026 16:53:46 -0600
From: Rob Herring <robh@...nel.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: krzk+dt@...nel.org, conor+dt@...nel.org, matthias.bgg@...il.com,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH 1/3] dt-bindings: arm: mediatek: mmsys: Allow single
 vdo/mmsys endpoint

On Thu, Jan 08, 2026 at 03:39:32PM +0100, AngeloGioacchino Del Regno wrote:
> The hardware supports using just a single output while leaving all
> of the others unconfigured (disabled), but the binding did not
> really allow specifying a single endpoint@0, because in this case
> one must either:
>  - Call the subnode `endpoint` and not declare any address and/or
>    size cells; or
>  - Call the subnode `endpoint@0` and have at least one more other
>    endpoint(@1 or @2), and declare address/size cells.
> 
> Allow specifying a single `endpoint` subnode, without the `@0`
> implicit suffix to suppress warnings happening on this kind of
> valid usecase.

This series isn't needed. We've dropped this check from dtc. I'll do a 
sync with upstream.

In any case, it's also a W=1 warning which wouldn't be my top priority.

Rob