Documentation/devicetree/bindings/display/bridge/renesas,lvds.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/bridge/renesas,lvds.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Renesas R-Car LVDS Encoder

maintainers:
  - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

description: |
  These DT bindings describe the LVDS encoder embedded in the Renesas R-Car
  Gen2, R-Car Gen3, RZ/G1 and RZ/G2 SoCs.

properties:
  compatible:
    enum:
      - renesas,r8a7742-lvds # for RZ/G1H compatible LVDS encoders
      - renesas,r8a7743-lvds # for RZ/G1M compatible LVDS encoders
      - renesas,r8a7744-lvds # for RZ/G1N compatible LVDS encoders
      - renesas,r8a774a1-lvds # for RZ/G2M compatible LVDS encoders
      - renesas,r8a774b1-lvds # for RZ/G2N compatible LVDS encoders
      - renesas,r8a774c0-lvds # for RZ/G2E compatible LVDS encoders
      - renesas,r8a774e1-lvds # for RZ/G2H compatible LVDS encoders
      - renesas,r8a7790-lvds # for R-Car H2 compatible LVDS encoders
      - renesas,r8a7791-lvds # for R-Car M2-W compatible LVDS encoders
      - renesas,r8a7793-lvds # for R-Car M2-N compatible LVDS encoders
      - renesas,r8a7795-lvds # for R-Car H3 compatible LVDS encoders
      - renesas,r8a7796-lvds # for R-Car M3-W compatible LVDS encoders
      - renesas,r8a77961-lvds # for R-Car M3-W+ compatible LVDS encoders
      - renesas,r8a77965-lvds # for R-Car M3-N compatible LVDS encoders
      - renesas,r8a77970-lvds # for R-Car V3M compatible LVDS encoders
      - renesas,r8a77980-lvds # for R-Car V3H compatible LVDS encoders
      - renesas,r8a77990-lvds # for R-Car E3 compatible LVDS encoders
      - renesas,r8a77995-lvds # for R-Car D3 compatible LVDS encoders

  reg:
    maxItems: 1

  clocks:
    minItems: 1
    maxItems: 4

  clock-names:
    minItems: 1
    maxItems: 4

  resets:
    maxItems: 1

  ports:
    $ref: /schemas/graph.yaml#/properties/ports

    properties:
      port@0:
        $ref: /schemas/graph.yaml#/properties/port
        description: Parallel RGB input port

      port@1:
        $ref: /schemas/graph.yaml#/properties/port
        description: LVDS output port

    required:
      - port@0
      - port@1

  power-domains:
    maxItems: 1

  renesas,companion:
    $ref: /schemas/types.yaml#/definitions/phandle
    description:
      phandle to the companion LVDS encoder. This property is mandatory
      for the first LVDS encoder on R-Car D3 and E3, and RZ/G2E SoCs, and shall
      point to the second encoder to be used as a companion in dual-link mode.
      It shall not be set for any other LVDS encoder.

required:
  - compatible
  - reg
  - clocks
  - power-domains
  - resets
  - ports

if:
  properties:
    compatible:
      enum:
        - renesas,r8a774c0-lvds
        - renesas,r8a77990-lvds
        - renesas,r8a77995-lvds
then:
  properties:
    clocks:
      minItems: 1
      items:
        - description: Functional clock
        - description: EXTAL input clock
        - description: DU_DOTCLKIN0 input clock
        - description: DU_DOTCLKIN1 input clock

    clock-names:
      minItems: 1
      items:
        - const: fck
        # The LVDS encoder can use the EXTAL or DU_DOTCLKINx clocks.
        # These clocks are optional.
        - enum:
            - extal
            - dclkin.0
            - dclkin.1
        - enum:
            - extal
            - dclkin.0
            - dclkin.1
        - enum:
            - extal
            - dclkin.0
            - dclkin.1

  required:
    - clock-names

else:
  properties:
    clocks:
      items:
        - description: Functional clock

    clock-names:
      items:
        - const: fck

    renesas,companion: false

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/renesas-cpg-mssr.h>
    #include <dt-bindings/power/r8a7795-sysc.h>

    lvds@feb90000 {
        compatible = "renesas,r8a7795-lvds";
        reg = <0xfeb90000 0x14>;
        clocks = <&cpg CPG_MOD 727>;
        power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
        resets = <&cpg 727>;

        ports {
            #address-cells = <1>;
            #size-cells = <0>;

            port@0 {
                reg = <0>;
                lvds_in: endpoint {
                    remote-endpoint = <&du_out_lvds0>;
                };
            };
            port@1 {
                reg = <1>;
                lvds_out: endpoint {
                    remote-endpoint = <&panel_in>;
                };
            };
        };
    };

  - |
    #include <dt-bindings/clock/renesas-cpg-mssr.h>
    #include <dt-bindings/power/r8a77990-sysc.h>

    lvds0: lvds@feb90000 {
        compatible = "renesas,r8a77990-lvds";
        reg = <0xfeb90000 0x20>;
        clocks = <&cpg CPG_MOD 727>,
                 <&x13_clk>,
                 <&extal_clk>;
        clock-names = "fck", "dclkin.0", "extal";
        power-domains = <&sysc R8A77990_PD_ALWAYS_ON>;
        resets = <&cpg 727>;

        renesas,companion = <&lvds1>;

        ports {
            #address-cells = <1>;
            #size-cells = <0>;

            port@0 {
                reg = <0>;
                lvds0_in: endpoint {
                    remote-endpoint = <&du_out_lvds0>;
                };
            };
            port@1 {
                reg = <1>;
                lvds0_out: endpoint {
                    remote-endpoint = <&panel_in1>;
                };
            };
        };
    };

    lvds1: lvds@feb90100 {
        compatible = "renesas,r8a77990-lvds";
        reg = <0xfeb90100 0x20>;
        clocks = <&cpg CPG_MOD 727>,
                 <&x13_clk>,
                 <&extal_clk>;
        clock-names = "fck", "dclkin.0", "extal";
        power-domains = <&sysc R8A77990_PD_ALWAYS_ON>;
        resets = <&cpg 726>;

        ports {
            #address-cells = <1>;
            #size-cells = <0>;

            port@0 {
                reg = <0>;
                lvds1_in: endpoint {
                    remote-endpoint = <&du_out_lvds1>;
                };
            };
            port@1 {
                reg = <1>;
                lvds1_out: endpoint {
                    remote-endpoint = <&panel_in2>;
                };
            };
        };
    };

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