Re: [PATCH v2 2/5] dt-bindings: display: bridge: Document Renesas R-Car V4H DSC bindings

[Tomi Valkeinen]

Hi,

On 15/05/2026 20:32, Conor Dooley wrote:
> On Fri, May 15, 2026 at 10:56:15AM +0300, Tomi Valkeinen wrote:
> > From: Marek Vasut <marek.vasut+renesas@xxxxxxxxxxx>
> >
> > The Renesas DSC Display Stream Compression is a bridge embedded in the
> > Renesas R-Car V4H SoC. The bridge performs VESA DSC encoding of up to
> > 8k or 400 Mpixel/s .
> >
> > Signed-off-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxxxx>
> > [tomi.valkeinen: fix the example]
> > Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@xxxxxxxxxxxxxxxx>
> > ---
> >   .../bindings/display/bridge/renesas,dsc.yaml       | 96 ++++++++++++++++++++++
> >   1 file changed, 96 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/display/bridge/renesas,dsc.yaml b/Documentation/devicetree/bindings/display/bridge/renesas,dsc.yaml
> > new file mode 100644
> > index 000000000000..2918d592732b
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/bridge/renesas,dsc.yaml
>
> Filename matching the compatible please.

All the other Documentation/devicetree/bindings/display/bridge/renesas,* 
files follow the same style, where the file name is in a generic format, 
but the actual compat strings are per SoC (and no generic compat string).

So is the fix here to just add "renesas,dsc" compat string (and perhaps 
later fix the other binding files too)? I'd rather not name this file 
"renesas,r8a779g0-dsc.yaml".

> pw-bot: changes-requested
>
> > @@ -0,0 +1,96 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/display/bridge/renesas,dsc.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Renesas R-Car DSC Display Stream Compression
> > +
> > +maintainers:
> > +  - Marek Vasut <marek.vasut+renesas@xxxxxxxxxxx>
> > +
> > +description: |
> > +  This binding describes the VESA DSC Display Stream Compression encoder
> > +  embedded in the Renesas R-Car V4H SoC. The encoder supports all DSC1.1
> > +  encoding mechanisms, configurable bits-per-pixel, resolution up to 8k.
> > +
> > +properties:
> > +  compatible:
> > +    const: renesas,r8a779g0-dsc
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  power-domains:
> > +    maxItems: 1
> > +
> > +  resets:
> > +    maxItems: 1
> > +
> > +  ports:
> > +    $ref: /schemas/graph.yaml#/properties/ports
> > +
> > +    properties:
> > +      port@0:
> > +        $ref: /schemas/graph.yaml#/properties/port
> > +        description: R-Car DU input port
> > +
> > +      port@1:
> > +        $ref: /schemas/graph.yaml#/properties/port
> > +        description: R-Car DSI output port
> > +
> > +    required:
> > +      - port@0
> > +      - port@1
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - clocks
> > +  - interrupts
> > +  - power-domains
> > +  - resets
> > +  - ports
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/clock/r8a779g0-cpg-mssr.h>
> > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +    #include <dt-bindings/power/r8a779g0-sysc.h>
> > +
> > +    dsc@feb8d000 {
>
> Speaking of fixing the example, should this not be "decoder" or
> "bridge"?

Indeed, bridge or encoder. Both seem to be used in the existing bindings.

 Tomi

> Not a big deal though.
> With the changed filename
> Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
>
>
> Cheers,
> Conor.
>
> > +        compatible = "renesas,r8a779g0-dsc";
> > +        reg = <0xfeb8d000 0x400>;
> > +        interrupts = <GIC_SPI 559 IRQ_TYPE_LEVEL_HIGH>;
> > +        clocks = <&cpg CPG_MOD 2819>;
> > +        power-domains = <&sysc R8A779G0_PD_ALWAYS_ON>;
> > +        resets = <&cpg 2819>;
> > +
> > +        ports {
> > +            #address-cells = <1>;
> > +            #size-cells = <0>;
> > +
> > +            port@0 {
> > +                reg = <0>;
> > +                dsc_in_dsi1: endpoint {
> > +                    remote-endpoint = <&du_out_dsi1>;
> > +                };
> > +            };
> > +
> > +            port@1 {
> > +                reg = <1>;
> > +                dsc_out_dsi1: endpoint {
> > +                    remote-endpoint = <&dsi1_in>;
> > +                };
> > +            };
> > +        };
> > +    };
> > +...
> >
> > --
> > 2.43.0