Re: [PATCH v3 13/13] arm64: dts: renesas: Add LVDS overlay for RZ/G3L SMARC EVK with ITE6263

[Geert Uytterhoeven]

Hi Biju,

On Wed, 26 Aug 2026 at 19:49, Biju <biju.das.au@xxxxxxxxx> wrote:
> From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
>
> Add a Device Tree overlay (r9a08g046l48-smarc-lvds-ite6263.dtso) for the
> RZ/G3L (R9A08G046) SMARC EVK board to support LVDS-to-HDMI output via the
> ITE 6263 HDMI transmitter.
>
> The overlay enables the LVDS controller and the display unit (DU/LCDC),
> and configures the ITE6263 on I2C2.
>
> Update the Makefile to build the overlay as both a standalone .dtbo and
> a composite .dtb (base DTB + overlay).
>
> Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>

Thanks for your patch!

> --- /dev/null
> +++ b/arch/arm64/boot/dts/renesas/r9a08g046l48-smarc-lvds-ite6263.dtso
> @@ -0,0 +1,104 @@
> +// SPDX-License-Identifier: GPL-2.0

Any chance this can be "(GPL-2.0-only OR BSD-2-Clause)", like all
already existing arch/arm64/boot/dts/renesas/r9a08g046* files?

> +/*
> + * Device Tree overlay for the RZ/G3L SMARC EVK with ITE6263
> + * connected to LVDS and LCDC enabled.
> + *
> + * Copyright (C) 2026 Renesas Electronics Corp.
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/pinctrl/renesas,r9a08g046-pinctrl.h>
> +
> +&{/} {
> +       lvds-to-hdmi-out {
> +               compatible = "hdmi-connector";
> +               type = "d";
> +
> +               port {
> +                       lvds_to_hdmi_con_out: endpoint {
> +                               remote-endpoint = <&it6263_out>;
> +                       };
> +               };

No DDC?

> +       };
> +
> +       reg_1v8: regulator-1v8 {
> +               compatible = "regulator-fixed";
> +               regulator-name = "fixed-1.8V";
> +               regulator-min-microvolt = <1800000>;
> +               regulator-max-microvolt = <1800000>;
> +               regulator-boot-on;
> +               regulator-always-on;
> +       };
> +
> +       reg_3v3: regulator-3v3 {
> +               compatible = "regulator-fixed";
> +               regulator-name = "fixed-3.3V";
> +               regulator-min-microvolt = <3300000>;
> +               regulator-max-microvolt = <3300000>;
> +               regulator-boot-on;
> +               regulator-always-on;
> +       };

Any specific reason you cannot just reuse the existing &reg_1p8v
and &reg_3p3v?

> +};
> +
> +&du {
> +       status = "okay";
> +};
> +
> +&i2c2 {
> +       #address-cells = <1>;
> +       #size-cells = <0>;
> +
> +       it6263: it6263@4c {

hdmi@4c

> +               compatible = "ite,it6263";
> +               reg = <0x4c>;
> +               data-mapping = "vesa-24";
> +               ivdd-supply = <&reg_1v8>;
> +               ovdd-supply = <&reg_3v3>;
> +               txavcc18-supply = <&reg_1v8>;
> +               txavcc33-supply = <&reg_3v3>;
> +               pvcc1-supply = <&reg_1v8>;
> +               pvcc2-supply = <&reg_1v8>;
> +               avcc-supply = <&reg_3v3>;
> +               anvdd-supply = <&reg_1v8>;
> +               apvdd-supply = <&reg_1v8>;
> +
> +               ports {
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +
> +                       port@0 {
> +                               reg = <0>;
> +                               bridge_in: endpoint {
> +                                       remote-endpoint = <&lvds_out>;
> +                               };
> +                       };
> +
> +                       port@2 {
> +                               reg = <2>;
> +                               it6263_out: endpoint {
> +                                       remote-endpoint = <&lvds_to_hdmi_con_out>;
> +                               };
> +                       };
> +               };

No audio?

> +       };
> +};

The rest LGTM.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds