Re: [PATCH 01/11] dt-bindings: display: meson-dw-hdmi: Add compatible for S4 HDMI controller

[Chuan Liu]

Hi Piotr,


On 11/18/2025 10:50 PM, Piotr Oniszczuk wrote:
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> Ao,
>
> Is there any chance to get this s4 drm hdmi series for current 6.18?
>
> (i tried backport this series to 6.18 but have some issues with reparent vpu_0_sel to sysclk_b_sel)

Why do we need to reparent vpu_0_sel to sysclk_b_sel? is there any
background here?

The vpu_clk on S4 doesn't support sysclk_b_sel as one of its
selectable clock sources, so this reparent operation will definitely
fail. This has nothing to do with the kernel version.

> > Wiadomość napisana przez Ao Xu via B4 Relay <devnull+ao.xu.amlogic.com@xxxxxxxxxx> w dniu 10 sty 2025, o godz. 06:39:
> >
> > From: Ao Xu <ao.xu@xxxxxxxxxxx>
> >
> > Add devicetree document for S4 HDMI controller
> >
> > Signed-off-by: Ao Xu <ao.xu@xxxxxxxxxxx>
> > ---
> > Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml b/Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml
> > index 84d68b8cfccc86fd87a6a0fd2b70af12e51eb8a4..6e0a8369eee915fab55af24d450a6c40e08def38 100644
> > --- a/Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml
> > +++ b/Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml
> > @@ -55,6 +55,7 @@ properties:
> >            - const: amlogic,meson-gx-dw-hdmi
> >        - enum:
> >            - amlogic,meson-g12a-dw-hdmi # G12A (S905X2, S905Y2, S905D2)
> > +          - amlogic,meson-s4-dw-hdmi # S4 (S905Y4)
> >
> >    reg:
> >      maxItems: 1
> >
> > --
> > 2.43.0
> >
> >
> >
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