xref: /openbmc/linux/Documentation/devicetree/bindings/display/bridge/sil,sii9022.yaml (revision f06e4c9e)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/bridge/sil,sii9022.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Silicon Image sii902x HDMI bridge

maintainers:
  - Boris Brezillon <bbrezillon@kernel.org>

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - sil,sii9022-cpi # CEC Programming Interface
              - sil,sii9022-tpi # Transmitter Programming Interface
          - const: sil,sii9022
      - const: sil,sii9022

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1
    description: Interrupt line used to inform the host about hotplug events.

  reset-gpios:
    maxItems: 1

  iovcc-supply:
    description: I/O Supply Voltage (1.8V or 3.3V)

  cvcc12-supply:
    description: Digital Core Supply Voltage (1.2V)

  '#sound-dai-cells':
    enum: [ 0, 1 ]
    description: |
      <0> if only I2S or S/PDIF pin is wired,
      <1> if both are wired.
      HDMI audio is configured only if this property is found.
      If HDMI audio is configured, the sii902x device becomes an I2S and/or
      S/PDIF audio codec component (e.g. a digital audio sink), that can be
      used in configuring full audio devices with simple-card or
      audio-graph-card bindings. See their binding documents on how to describe
      the way the
      sii902x device is connected to the rest of the audio system:
      Documentation/devicetree/bindings/sound/simple-card.yaml
      Documentation/devicetree/bindings/sound/audio-graph-card.yaml
      Note: In case of the audio-graph-card binding the used port index should
      be 3.

  sil,i2s-data-lanes:
    $ref: /schemas/types.yaml#/definitions/uint32-array
    minItems: 1
    maxItems: 4
    uniqueItems: true
    items:
      enum: [ 0, 1, 2, 3 ]
    description:
      Each integer indicates which I2S pin is connected to which audio FIFO.
      The first integer selects the I2S audio pin for the first audio FIFO#0
      (HDMI channels 1&2), the second for FIFO#1 (HDMI channels 3&4), and so
      on. There are 4 FIFOs and 4 I2S pins (SD0 - SD3). Any I2S pin can be
      connected to any FIFO, but there can be no gaps. E.g. an I2S pin must be
      mapped to FIFO#0 and FIFO#1 before mapping a channel to FIFO#2. The
      default value is <0>, describing SD0 pin being routed to HDMI audio
      FIFO#0.

  clocks:
    maxItems: 1
    description: MCLK input. MCLK can be used to produce HDMI audio CTS values.

  clock-names:
    const: mclk

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

    properties:
      port@0:
        $ref: /schemas/graph.yaml#/properties/port
        description: Parallel RGB input port

      port@1:
        $ref: /schemas/graph.yaml#/properties/port
        description: HDMI output port

      port@3:
        $ref: /schemas/graph.yaml#/properties/port
        description: Sound input port

required:
  - compatible
  - reg

additionalProperties: false

examples:
  - |
    i2c {
        #address-cells = <1>;
        #size-cells = <0>;

        hdmi-bridge@39 {
            compatible = "sil,sii9022";
            reg = <0x39>;
            reset-gpios = <&pioA 1 0>;
            iovcc-supply = <&v3v3_hdmi>;
            cvcc12-supply = <&v1v2_hdmi>;

            #sound-dai-cells = <0>;
            sil,i2s-data-lanes = < 0 1 2 >;
            clocks = <&mclk>;
            clock-names = "mclk";

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

                port@0 {
                    reg = <0>;
                    bridge_in: endpoint {
                        remote-endpoint = <&dc_out>;
                    };
                };
            };
        };
    };