Re: [PATCH] arm64: dts: renesas: rz-smarc-du-adv7513: Simplify DU port configuration

[Lad, Prabhakar]

Hi Geert,

On Mon, Apr 20, 2026 at 2:39 PM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
>
> Hi Prabhkar,
>
> On Mon, 20 Apr 2026 at 15:22, Prabhakar <prabhakar.csengg@xxxxxxxxx> wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> >
> > The SoC dtsi already defines the du node with its ports hierarchy,
> > including the du_out_rgb endpoint node under port@0. There is no need
> > to redefine the entire ports/port@0 structure in the board-level dtsi.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
>
> Thanks for your patch!
>
> > --- a/arch/arm64/boot/dts/renesas/rz-smarc-du-adv7513.dtsi
> > +++ b/arch/arm64/boot/dts/renesas/rz-smarc-du-adv7513.dtsi
> > @@ -24,19 +24,10 @@ &du {
> >         pinctrl-names = "default";
> >
> >         status = "okay";
> > +};
> >
> > -       ports {
> > -               #address-cells = <1>;
> > -               #size-cells = <0>;
> > -
> > -               port@0 {
> > -                       reg = <0>;
> > -
> > -                       du_out_rgb: endpoint {
> > -                               remote-endpoint = <&adv7513_in>;
> > -                       };
> > -               };
> > -       };
> > +&du_out_rgb {
> > +       remote-endpoint = <&adv7513_in>;
> >  };
> >
> >  &ADV7513_PARENT_I2C {
>
> Doesn't this introduce new DTC W=1 warnings?
> Cfr. "[PATCH 0/4] arm64: dts: renesas: Fix missing cells and reg"
> https://lore.kernel.org/20260326042411.215241-1-marek.vasut+renesas@xxxxxxxxxxx/
>
No it does not introduce new warnings (logs [1]) as the SoC DTSI
already has the missing cells and reg properties [2].

[1] https://gist.github.com/prabhakarlad/69f53e32faee17ead390c9ed68c322d3
[2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/arch/arm64/boot/dts/renesas/r9a07g043u.dtsi?h=next-20260420#n169

Cheers,
Prabhakar