linux-stable/Documentation/devicetree/bindings/display/allwinner,sun8i-r40-tcon-top.yaml

# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/allwinner,sun8i-r40-tcon-top.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Allwinner R40 TCON TOP Device Tree Bindings

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

description: |
  TCON TOPs main purpose is to configure whole display pipeline. It
  determines relationships between mixers and TCONs, selects source
  TCON for HDMI, muxes LCD and TV encoder GPIO output, selects TV
  encoder clock source and contains additional TV TCON and DSI gates.

  It allows display pipeline to be configured in very different ways:

                                  / LCD0/LVDS0
                   / [0] TCON-LCD0
                   |              \ MIPI DSI
   mixer0          |
          \        / [1] TCON-LCD1 - LCD1/LVDS1
           TCON-TOP
          /        \ [2] TCON-TV0 [0] - TVE0/RGB
   mixer1          |                  \
                   |                   TCON-TOP - HDMI
                   |                  /
                   \ [3] TCON-TV1 [1] - TVE1/RGB

  Note that both TCON TOP references same physical unit. Both mixers
  can be connected to any TCON. Not all TCON TOP variants support all
  features.  

properties:
  "#clock-cells":
    const: 1

  compatible:
    enum:
      - allwinner,sun8i-r40-tcon-top
      - allwinner,sun50i-h6-tcon-top

  reg:
    maxItems: 1

  clocks:
    minItems: 2
    items:
      - description: The TCON TOP interface clock
      - description: The TCON TOP TV0 clock
      - description: The TCON TOP TVE0 clock
      - description: The TCON TOP TV1 clock
      - description: The TCON TOP TVE1 clock
      - description: The TCON TOP MIPI DSI clock

  clock-names:
    minItems: 2
    items:
      - const: bus
      - const: tcon-tv0
      - const: tve0
      - const: tcon-tv1
      - const: tve1
      - const: dsi

  clock-output-names:
    minItems: 1
    maxItems: 3
    description: >
      The first item is the name of the clock created for the TV0
      channel, the second item is the name of the TCON TV1 channel
      clock and the third one is the name of the DSI channel clock.      

  resets:
    maxItems: 1

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

    properties:
      port@0:
        $ref: /schemas/graph.yaml#/properties/port
        description: |
          Input endpoint for Mixer 0 mux.          

      port@1:
        $ref: /schemas/graph.yaml#/properties/port
        description: |
          Output endpoint for Mixer 0 mux          

      port@2:
        $ref: /schemas/graph.yaml#/properties/port
        description: |
          Input endpoint for Mixer 1 mux.          

      port@3:
        $ref: /schemas/graph.yaml#/properties/port
        description: |
          Output endpoint for Mixer 1 mux          

      port@4:
        $ref: /schemas/graph.yaml#/properties/port
        description: |
          Input endpoint for HDMI mux.          

      port@5:
        $ref: /schemas/graph.yaml#/properties/port
        description: |
          Output endpoint for HDMI mux          

    required:
      - port@0
      - port@1
      - port@4
      - port@5

required:
  - "#clock-cells"
  - compatible
  - reg
  - clocks
  - clock-names
  - clock-output-names
  - resets
  - ports

additionalProperties: false

if:
  properties:
    compatible:
      contains:
        const: allwinner,sun50i-h6-tcon-top

then:
  properties:
    clocks:
      maxItems: 2

    clock-output-names:
      maxItems: 1

else:
  properties:
    clocks:
      minItems: 6

    clock-output-names:
      minItems: 3

    ports:
      required:
        - port@2
        - port@3

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>

    #include <dt-bindings/clock/sun8i-r40-ccu.h>
    #include <dt-bindings/reset/sun8i-r40-ccu.h>

      tcon_top: tcon-top@1c70000 {
          compatible = "allwinner,sun8i-r40-tcon-top";
          reg = <0x01c70000 0x1000>;
          clocks = <&ccu CLK_BUS_TCON_TOP>,
                   <&ccu CLK_TCON_TV0>,
                   <&ccu CLK_TVE0>,
                   <&ccu CLK_TCON_TV1>,
                   <&ccu CLK_TVE1>,
                   <&ccu CLK_DSI_DPHY>;
          clock-names = "bus",
                        "tcon-tv0",
                        "tve0",
                        "tcon-tv1",
                        "tve1",
                        "dsi";
          clock-output-names = "tcon-top-tv0",
                               "tcon-top-tv1",
                               "tcon-top-dsi";
          resets = <&ccu RST_BUS_TCON_TOP>;
          #clock-cells = <1>;

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

              tcon_top_mixer0_in: port@0 {
                  reg = <0>;

                  tcon_top_mixer0_in_mixer0: endpoint {
                      remote-endpoint = <&mixer0_out_tcon_top>;
                  };
              };

              tcon_top_mixer0_out: port@1 {
                  #address-cells = <1>;
                  #size-cells = <0>;
                  reg = <1>;

                  tcon_top_mixer0_out_tcon_lcd0: endpoint@0 {
                      reg = <0>;
                  };

                  tcon_top_mixer0_out_tcon_lcd1: endpoint@1 {
                      reg = <1>;
                  };

                  tcon_top_mixer0_out_tcon_tv0: endpoint@2 {
                      reg = <2>;
                      remote-endpoint = <&tcon_tv0_in_tcon_top_mixer0>;
                  };

                  tcon_top_mixer0_out_tcon_tv1: endpoint@3 {
                      reg = <3>;
                      remote-endpoint = <&tcon_tv1_in_tcon_top_mixer0>;
                  };
              };

              tcon_top_mixer1_in: port@2 {
                  #address-cells = <1>;
                  #size-cells = <0>;
                  reg = <2>;

                  tcon_top_mixer1_in_mixer1: endpoint@1 {
                      reg = <1>;
                      remote-endpoint = <&mixer1_out_tcon_top>;
                  };
              };

              tcon_top_mixer1_out: port@3 {
                  #address-cells = <1>;
                  #size-cells = <0>;
                  reg = <3>;

                  tcon_top_mixer1_out_tcon_lcd0: endpoint@0 {
                      reg = <0>;
                  };

                  tcon_top_mixer1_out_tcon_lcd1: endpoint@1 {
                      reg = <1>;
                  };

                  tcon_top_mixer1_out_tcon_tv0: endpoint@2 {
                      reg = <2>;
                      remote-endpoint = <&tcon_tv0_in_tcon_top_mixer1>;
                  };

                  tcon_top_mixer1_out_tcon_tv1: endpoint@3 {
                      reg = <3>;
                      remote-endpoint = <&tcon_tv1_in_tcon_top_mixer1>;
                  };
              };

              tcon_top_hdmi_in: port@4 {
                  #address-cells = <1>;
                  #size-cells = <0>;
                  reg = <4>;

                  tcon_top_hdmi_in_tcon_tv0: endpoint@0 {
                      reg = <0>;
                      remote-endpoint = <&tcon_tv0_out_tcon_top>;
                  };

                  tcon_top_hdmi_in_tcon_tv1: endpoint@1 {
                      reg = <1>;
                      remote-endpoint = <&tcon_tv1_out_tcon_top>;
                  };
              };

              tcon_top_hdmi_out: port@5 {
                  reg = <5>;

                  tcon_top_hdmi_out_hdmi: endpoint {
                      remote-endpoint = <&hdmi_in_tcon_top>;
                  };
              };
          };
      };    

...