xref: /kernel/linux/linux-5.10/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,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:
    type: object
    description: |
      This device has two video ports. Their connections are modelled using the
      OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.
      Each port shall have a single endpoint.

    properties:
      '#address-cells':
        const: 1

      '#size-cells':
        const: 0

      port@0:
        type: object
        description: Parallel RGB input port

      port@1:
        type: object
        description: LVDS output port

    required:
      - port@0
      - port@1

    additionalProperties: false

  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 D3 and E3 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
      maxItems: 4
      items:
        - description: Functional clock
        - description: EXTAL input clock
        - description: DU_DOTCLKIN0 input clock
        - description: DU_DOTCLKIN1 input clock

    clock-names:
      minItems: 1
      maxItems: 4
      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:
      maxItems: 1
      items:
        - description: Functional clock

    clock-names:
      maxItems: 1
      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>;
                };
            };
        };
    };

...