[PATCH RFC 05/13] dt-bindings: mfd: Add starfive,jh7110-hdmi-mfd

[Conor Dooley]

On Sat, Nov 08, 2025 at 02:04:39AM +0100, Michal Wilczynski wrote:
> Add the dt-binding for the StarFive JH7110 HDMI MFD (Multi-Function
> Device).
> 
> The JH7110 HDMI IP is a monolithic block containing both the digital
> controller and analog PHY in a single register space. This binding
> defines the MFD parent device, which holds the shared register map and
> populates its two children: the PHY and the controller. This is
> necessary to resolve a circular clock dependency between the HDMI block
> and the VOUT clock generator.
> 
> Signed-off-by: Michal Wilczynski <m.wilczynski at samsung.com>
> ---
>  .../bindings/mfd/starfive,jh7110-hdmi-mfd.yaml     | 93 ++++++++++++++++++++++
>  MAINTAINERS                                        |  1 +
>  2 files changed, 94 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/starfive,jh7110-hdmi-mfd.yaml b/Documentation/devicetree/bindings/mfd/starfive,jh7110-hdmi-mfd.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..2cbfb2b975083240575a0567b06e6cafd542cf9b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/starfive,jh7110-hdmi-mfd.yaml
> @@ -0,0 +1,93 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/starfive,jh7110-hdmi-mfd.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: StarFive JH7110 HDMI MFD (Controller+PHY)
> +
> +maintainers:
> +  - Michal Wilczynski <m.wilczynski at samsung.com>
> +
> +description:
> +  The StarFive JH7110 HDMI block is a monolithic IP containing both
> +  the digital controller logic and the analog PHY logic in a single
> +  register space.
> +
> +properties:
> +  compatible:
> +    const: starfive,jh7110-hdmi-mfd

Drop "mfd" from this please, maybe using "subsystem" is a more suitable
alternative?

> +
> +  reg:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +
> +patternProperties:
> +  "^phy(@[0-9a-f]+)?$":
> +    $ref: ../phy/starfive,jh7110-inno-hdmi-phy.yaml#
> +  "^controller(@[0-9a-f]+)?$":
> +    $ref: ../display/bridge/starfive,jh7110-inno-hdmi-controller.yaml#

Can you make these absolute references please?

> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/starfive,jh7110-crg.h>
> +    #include <dt-bindings/reset/starfive,jh7110-crg.h>
> +
> +    soc {
> +        #address-cells = <1>;
> +        #size-cells = <1>;
> +
> +        hdmi_mfd: hdmi at 29590000 {

And drop any unused labels from here.
I definitely thing you could do away with the same example being in
three different places. Maybe one full one here, and two partials in
each of the children?

> +            compatible = "starfive,jh7110-hdmi-mfd";
> +            reg = <0x29590000 0x4000>;
> +
> +            hdmi_phy: phy {
> +                compatible = "starfive,jh7110-inno-hdmi-phy";
> +                clocks = <&xin24m>;
> +                clock-names = "refoclk";
> +                #clock-cells = <0>;
> +                clock-output-names = "hdmi_pclk";
> +                #phy-cells = <0>;
> +            };
> +
> +            hdmi_controller: controller {
> +                compatible = "starfive,jh7110-inno-hdmi-controller";
> +                interrupts = <99>;
> +                clocks = <&voutcrg JH7110_VOUTCLK_HDMI_TX_SYS>,
> +                        <&voutcrg JH7110_VOUTCLK_HDMI_TX_MCLK>,
> +                        <&voutcrg JH7110_VOUTCLK_HDMI_TX_BCLK>,
> +                        <&hdmi_phy>;
> +                clock-names = "sys", "mclk", "bclk", "pclk";
> +                resets = <&voutcrg JH7110_VOUTRST_HDMI_TX_HDMI>;
> +                reset-names = "hdmi_tx";
> +                phys = <&hdmi_phy>;
> +                phy-names = "hdmi-phy";
> +
> +                ports {
> +                    #address-cells = <1>;
> +                    #size-cells = <0>;
> +
> +                    port at 0 {
> +                        reg = <0>;
> +                        hdmi_in: endpoint {
> +                            remote-endpoint = <&dpu_out_dpi0>;
> +                        };
> +                    };
> +
> +                    port at 1 {
> +                        reg = <1>;
> +                        hdmi_out: endpoint {
> +                            remote-endpoint = <&hdmi_con_in>;
> +                        };
> +                    };
> +                };
> +            };
> +        };
> +    };
> +
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 66fab45bbee8c1a5f73d09bb470d28029b8c6139..052876c6538f980f75ff64e78b6ebea460307904 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -24048,6 +24048,7 @@ STARFIVE JH7110 DISPLAY SUBSYSTEM
>  M:	Michal Wilczynski <m.wilczynski at samsung.com>
>  S:	Maintained
>  F:	Documentation/devicetree/bindings/display/bridge/starfive,jh7110-inno-hdmi-controller.yaml
> +F:	Documentation/devicetree/bindings/mfd/starfive,jh7110-hdmi-mfd.yaml
>  F:	Documentation/devicetree/bindings/phy/starfive,jh7110-inno-hdmi-phy.yaml
>  F:	Documentation/devicetree/bindings/soc/starfive/starfive,jh7110-vout-subsystem.yaml
>  
> 
> -- 
> 2.34.1
> 
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