xref: /openbmc/linux/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pixel-link.yaml (revision 4f2c0a4acffbec01079c28f839422e64ddeff004)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/bridge/fsl,imx8qxp-pixel-link.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Freescale i.MX8qm/qxp Display Pixel Link

maintainers:
  - Liu Ying <victor.liu@nxp.com>

description: |
  The Freescale i.MX8qm/qxp Display Pixel Link(DPL) forms a standard
  asynchronous linkage between pixel sources(display controller or
  camera module) and pixel consumers(imaging or displays).
  It consists of two distinct functions, a pixel transfer function and a
  control interface.  Multiple pixel channels can exist per one control channel.
  This binding documentation is only for pixel links whose pixel sources are
  display controllers.

  The i.MX8qm/qxp Display Pixel Link is accessed via System Controller Unit(SCU)
  firmware.

properties:
  compatible:
    enum:
      - fsl,imx8qm-dc-pixel-link
      - fsl,imx8qxp-dc-pixel-link

  fsl,dc-id:
    $ref: /schemas/types.yaml#/definitions/uint8
    description: |
      u8 value representing the display controller index that the pixel link
      connects to.

  fsl,dc-stream-id:
    $ref: /schemas/types.yaml#/definitions/uint8
    description: |
      u8 value representing the display controller stream index that the pixel
      link connects to.
    enum: [0, 1]

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

    properties:
      port@0:
        $ref: /schemas/graph.yaml#/properties/port
        description: The pixel link input port node from upstream video source.

    patternProperties:
      "^port@[1-4]$":
        $ref: /schemas/graph.yaml#/properties/port
        description: The pixel link output port node to downstream bridge.

    required:
      - port@0
      - port@1
      - port@2
      - port@3
      - port@4

allOf:
  - if:
      properties:
        compatible:
          contains:
            const: fsl,imx8qxp-dc-pixel-link
    then:
      properties:
        fsl,dc-id:
          const: 0

  - if:
      properties:
        compatible:
          contains:
            const: fsl,imx8qm-dc-pixel-link
    then:
      properties:
        fsl,dc-id:
          enum: [0, 1]

required:
  - compatible
  - fsl,dc-id
  - fsl,dc-stream-id
  - ports

additionalProperties: false

examples:
  - |
    dc0-pixel-link0 {
        compatible = "fsl,imx8qxp-dc-pixel-link";
        fsl,dc-id = /bits/ 8 <0>;
        fsl,dc-stream-id = /bits/ 8 <0>;

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

            /* from dc0 pixel combiner channel0 */
            port@0 {
                reg = <0>;

                dc0_pixel_link0_dc0_pixel_combiner_ch0: endpoint {
                    remote-endpoint = <&dc0_pixel_combiner_ch0_dc0_pixel_link0>;
                };
            };

            /* to PXL2DPIs in MIPI/LVDS combo subsystems */
            port@1 {
                #address-cells = <1>;
                #size-cells = <0>;
                reg = <1>;

                dc0_pixel_link0_mipi_lvds_0_pxl2dpi: endpoint@0 {
                    reg = <0>;
                    remote-endpoint = <&mipi_lvds_0_pxl2dpi_dc0_pixel_link0>;
                };

                dc0_pixel_link0_mipi_lvds_1_pxl2dpi: endpoint@1 {
                    reg = <1>;
                    remote-endpoint = <&mipi_lvds_1_pxl2dpi_dc0_pixel_link0>;
                };
            };

            /* unused */
            port@2 {
                reg = <2>;
            };

            /* unused */
            port@3 {
                reg = <3>;
            };

            /* to imaging subsystem */
            port@4 {
                reg = <4>;
            };
        };
    };