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

[Geert Uytterhoeven]

Hi Biju,

On Wed, 9 Sept 2026 at 04:57, Biju Das <biju.das.jz@xxxxxxxxxxxxxx> wrote:
> > From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
> > On Wed, 26 Aug 2026 at 19:49, Biju <biju.das.au@xxxxxxxxx> wrote:
> > > 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>

> > > --- /dev/null
> > > +++ b/arch/arm64/boot/dts/renesas/r9a08g046l48-smarc-lvds-ite6263.dtso

> > > +&{/} {
> > > +       lvds-to-hdmi-out {
> > > +               compatible = "hdmi-connector";
> > > +               type = "d";
> > > +
> > > +               port {
> > > +                       lvds_to_hdmi_con_out: endpoint {
> > > +                               remote-endpoint = <&it6263_out>;
> > > +                       };
> > > +               };
> >
> > No DDC?
>
> The driver uses parent i2c bus as ddc-i2c-bus. That is the reason not added.

Neat trick. Do you know where that is handled? I couldn't find it.

> > > +       it6263: it6263@4c {
> >
> > hdmi@4c
> Ok.
>
> >
> > > +               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?
>
> Binding describes audio port, but ITE6263 driver supports only video mode compared to
> both Audio/Video support on ADV7535 driver.
>
> I will add audio entries once we have driver support.
> Hope it is ok for you?

That's fine, thanks!

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