Re: [PATCH 6/7] arm64: dts: renesas: r8a779md: Add Renesas R-Car R8A779MD M3Le DTs

Laurent Pinchart
2026-04-29T22:11:57Z

Hi Marek,

Thank you for the patch.

On Sun, Apr 19, 2026 at 09:35:37PM +0200, Marek Vasut wrote:
> From: Nguyen Tran <nguyen.tran.pz@bp.renesas.com>
>
> Add support for the Renesas R-Car M3Le (R8A779MD) SoC, a variant of the
> R-Car M3-N (R8A77965) SoC. The Renesas M3Le SoC is a register-compatible
> variant of the R8A77965 (M3-N) with reduced set of peripherals.
>
> Signed-off-by: Nguyen Tran <nguyen.tran.pz@bp.renesas.com>
> Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
> ---
> Cc: Conor Dooley <conor+dt@kernel.org>
> Cc: David Airlie <airlied@gmail.com>
> Cc: Geert Uytterhoeven <geert+renesas@glider.be>
> Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
> Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> Cc: Magnus Damm <magnus.damm@gmail.com>
> Cc: Maxime Ripard <mripard@kernel.org>
> Cc: Michael Turquette <mturquette@baylibre.com>
> Cc: Rob Herring <robh@kernel.org>
> Cc: Simona Vetter <simona@ffwll.ch>
> Cc: Stephen Boyd <sboyd@kernel.org>
> Cc: Thomas Zimmermann <tzimmermann@suse.de>
> Cc: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
> Cc: devicetree@vger.kernel.org
> Cc: dri-devel@lists.freedesktop.org
> Cc: linux-clk@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Cc: linux-renesas-soc@vger.kernel.org
> ---
> arch/arm64/boot/dts/renesas/r8a779md.dtsi | 48 +++++++++++++++++++++++
> 1 file changed, 48 insertions(+)
> create mode 100644 arch/arm64/boot/dts/renesas/r8a779md.dtsi
>
> diff --git a/arch/arm64/boot/dts/renesas/r8a779md.dtsi b/arch/arm64/boot/dts/renesas/r8a779md.dtsi
> new file mode 100644
> index 0000000000000..7e0f5fe4cd439
> --- /dev/null
> +++ b/arch/arm64/boot/dts/renesas/r8a779md.dtsi
> @@ -0,0 +1,48 @@
> +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +/*
> + * Device Tree Source for the R-Car M3Le (R8A779MD) SoC
> + *
> + * Copyright (C) 2025-2026 Renesas Electronics Corp.
> + */
> +
> +#include "r8a77965.dtsi"
> +
> +/ {
> + compatible = "renesas,r8a779md", "renesas,r8a77965";
> +};
> +
> +/delete-node/ &csi20;
> +/delete-node/ &drif00;
> +/delete-node/ &drif01;
> +/delete-node/ &drif10;
> +/delete-node/ &drif11;
> +/delete-node/ &drif20;
> +/delete-node/ &drif21;
> +/delete-node/ &drif30;
> +/delete-node/ &drif31;
> +/delete-node/ &hdmi0;
> +/delete-node/ &mlp;
> +/delete-node/ &pciec1;
> +/delete-node/ &sata;
> +/delete-node/ &sdhi3;
> +/delete-node/ &usb3_peri0;
> +/delete-node/ &usb3_phy0;
> +/delete-node/ &vin0csi20;
> +/delete-node/ &vin1csi20;
> +/delete-node/ &vin2csi20;
> +/delete-node/ &vin3csi20;
> +/delete-node/ &vin4csi20;
> +/delete-node/ &vin5csi20;
> +/delete-node/ &vin6csi20;
> +/delete-node/ &vin7csi20;
> +/delete-node/ &xhci0;
> +
> +&du {
> + compatible = "renesas,du-r8a779md";
> + renesas,cmms = <&cmm0>, <&cmm3>;

Shouldn't you then also delete the cmm1 node ?

And does the DU still need three clocks and three interrupts ?

> + renesas,vsps = <&vspd0 0>, <&vspd1 0>;
> +
> + ports {
> + /delete-node/ port@1;
> + };
> +};

--
Regards,

Laurent Pinchart