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

title: Freescale i.MX8MP DPI to LVDS bridge chip

maintainers:
  - Marek Vasut <marex@denx.de>

description: |
  The i.MX8MP mediamix contains two registers which are responsible
  for configuring the on-SoC DPI-to-LVDS serializer. This describes
  those registers as bridge within the DT.

properties:
  compatible:
    enum:
      - fsl,imx6sx-ldb
      - fsl,imx8mp-ldb
      - fsl,imx93-ldb

  clocks:
    maxItems: 1

  clock-names:
    const: ldb

  reg:
    maxItems: 2

  reg-names:
    items:
      - const: ldb
      - const: lvds

  nxp,enable-termination-resistor:
    type: boolean
    description:
      Indicates that the built-in 100 Ohm termination resistor on the LVDS
      output is enabled. This property is optional and controlled via the
      HS_EN bit in the LVDS_CTRL register. Enabling it can improve signal
      quality and prevent visual artifacts on some boards, but increases
      power consumption.

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

    properties:
      port@0:
        $ref: /schemas/graph.yaml#/properties/port
        description: Video port for DPI input.

      port@1:
        $ref: /schemas/graph.yaml#/properties/port
        description: Video port for LVDS Channel-A output (panel or bridge).

      port@2:
        $ref: /schemas/graph.yaml#/properties/port
        description: Video port for LVDS Channel-B output (panel or bridge).

    required:
      - port@0
      - port@1

required:
  - compatible
  - clocks
  - ports
  - reg

allOf:
  - if:
      properties:
        compatible:
          contains:
            enum:
              - fsl,imx6sx-ldb
              - fsl,imx93-ldb
    then:
      properties:
        ports:
          properties:
            port@2: false
  - if:
      not:
        properties:
          compatible:
            contains:
              const: fsl,imx6sx-ldb
    then:
      required:
        - reg-names

  - if:
      properties:
        compatible:
          contains:
            const: fsl,imx6sx-ldb
    then:
      properties:
        nxp,enable-termination-resistor: false

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/imx8mp-clock.h>
 
    blk-ctrl {
        #address-cells = <1>;
        #size-cells = <1>;
 
        bridge@5c {
            compatible = "fsl,imx8mp-ldb";
            clocks = <&clk IMX8MP_CLK_MEDIA_LDB>;
            clock-names = "ldb";
            reg = <0x5c 0x4>, <0x128 0x4>;
            reg-names = "ldb", "lvds";
 
            ports {
                #address-cells = <1>;
                #size-cells = <0>;
 
                port@0 {
                    reg = <0>;
 
                    ldb_from_lcdif2: endpoint {
                        remote-endpoint = <&lcdif2_to_ldb>;
                    };
                };
 
                port@1 {
                    reg = <1>;
 
                    ldb_lvds_ch0: endpoint {
                        remote-endpoint = <&ldb_to_lvdsx4panel>;
                    };
                };
 
                port@2 {
                    reg = <2>;
 
                    ldb_lvds_ch1: endpoint {
                    };
                };
            };
        };
    };