xref: /openbmc/linux/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-display-frontend.yaml (revision dd3cb467)

# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/allwinner,sun4i-a10-display-frontend.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Allwinner A10 Display Engine Frontend

maintainers:
  - Chen-Yu Tsai <wens@csie.org>
  - Maxime Ripard <mripard@kernel.org>

description: |
  The display engine frontend does formats conversion, scaling,
  deinterlacing and color space conversion.

properties:
  compatible:
    enum:
      - allwinner,sun4i-a10-display-frontend
      - allwinner,sun5i-a13-display-frontend
      - allwinner,sun6i-a31-display-frontend
      - allwinner,sun7i-a20-display-frontend
      - allwinner,sun8i-a23-display-frontend
      - allwinner,sun8i-a33-display-frontend
      - allwinner,sun9i-a80-display-frontend

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    items:
      - description: The frontend interface clock
      - description: The frontend module clock
      - description: The frontend DRAM clock

  clock-names:
    items:
      - const: ahb
      - const: mod
      - const: ram

  # FIXME: This should be made required eventually once every SoC will
  # have the MBUS declared.
  interconnects:
    maxItems: 1

  # FIXME: This should be made required eventually once every SoC will
  # have the MBUS declared.
  interconnect-names:
    const: dma-mem

  resets:
    maxItems: 1

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

    properties:
      port@0:
        $ref: /schemas/graph.yaml#/properties/port
        description: |
          Input endpoints of the controller.

      port@1:
        $ref: /schemas/graph.yaml#/properties/port
        description: |
          Output endpoints of the controller.

    required:
      - port@1

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - clock-names
  - resets
  - ports

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/sun4i-a10-ccu.h>
    #include <dt-bindings/reset/sun4i-a10-ccu.h>

    fe0: display-frontend@1e00000 {
        compatible = "allwinner,sun4i-a10-display-frontend";
        reg = <0x01e00000 0x20000>;
        interrupts = <47>;
        clocks = <&ccu CLK_AHB_DE_FE0>, <&ccu CLK_DE_FE0>,
                 <&ccu CLK_DRAM_DE_FE0>;
        clock-names = "ahb", "mod",
                      "ram";
        resets = <&ccu RST_DE_FE0>;

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

            fe0_out: port@1 {
                #address-cells = <1>;
                #size-cells = <0>;
                reg = <1>;

                fe0_out_be0: endpoint@0 {
                    reg = <0>;
                    remote-endpoint = <&be0_in_fe0>;
                };

                fe0_out_be1: endpoint@1 {
                    reg = <1>;
                    remote-endpoint = <&be1_in_fe0>;
                };
            };
        };
    };


...