# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/media/xilinx/xlnx,csi2rxss.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Xilinx MIPI CSI-2 Receiver Subsystem

maintainers:
  - Vishal Sagar <vishal.sagar@xilinx.com>

description: |
  The Xilinx MIPI CSI-2 Receiver Subsystem is used to capture MIPI CSI-2
  traffic from compliant camera sensors and send the output as AXI4 Stream
  video data for image processing.
  The subsystem consists of a MIPI D-PHY in slave mode which captures the
  data packets. This is passed along the MIPI CSI-2 Rx IP which extracts the
  packet data. The optional Video Format Bridge (VFB) converts this data to
  AXI4 Stream video data.
  For more details, please refer to PG232 Xilinx MIPI CSI-2 Receiver Subsystem.
  Please note that this bindings includes only the MIPI CSI-2 Rx controller
  and Video Format Bridge and not D-PHY.

properties:
  compatible:
    items:
      - enum:
          - xlnx,mipi-csi2-rx-subsystem-5.0

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    description: List of clock specifiers
    items:
      - description: AXI Lite clock
      - description: Video clock

  clock-names:
    items:
      - const: lite_aclk
      - const: video_aclk

  xlnx,csi-pxl-format:
    description: |
      This denotes the CSI Data type selected in hw design.
      Packets other than this data type (except for RAW8 and
      User defined data types) will be filtered out.
      Possible values are as below -
      0x1e - YUV4228B
      0x1f - YUV42210B
      0x20 - RGB444
      0x21 - RGB555
      0x22 - RGB565
      0x23 - RGB666
      0x24 - RGB888
      0x28 - RAW6
      0x29 - RAW7
      0x2a - RAW8
      0x2b - RAW10
      0x2c - RAW12
      0x2d - RAW14
      0x2e - RAW16
      0x2f - RAW20
    $ref: /schemas/types.yaml#/definitions/uint32
    oneOf:
      - minimum: 0x1e
        maximum: 0x24
      - minimum: 0x28
        maximum: 0x2f

  xlnx,vfb:
    type: boolean
    description: Present when Video Format Bridge is enabled in IP configuration

  xlnx,en-csi-v2-0:
    type: boolean
    description: Present if CSI v2 is enabled in IP configuration.

  xlnx,en-vcx:
    type: boolean
    description: |
      When present, there are maximum 16 virtual channels, else only 4.

  xlnx,en-active-lanes:
    type: boolean
    description: |
      Present if the number of active lanes can be re-configured at
      runtime in the Protocol Configuration Register. Otherwise all lanes,
      as set in IP configuration, are always active.

  video-reset-gpios:
    description: Optional specifier for a GPIO that asserts video_aresetn.
    maxItems: 1

  ports:
    type: object

    properties:
      port@0:
        type: object
        description: |
          Input / sink port node, single endpoint describing the
          CSI-2 transmitter.

        properties:
          reg:
            const: 0

          endpoint:
            type: object

            properties:

              data-lanes:
                description: |
                  This is required only in the sink port 0 endpoint which
                  connects to MIPI CSI-2 source like sensor.
                  The possible values are -
                  1       - For 1 lane enabled in IP.
                  1 2     - For 2 lanes enabled in IP.
                  1 2 3   - For 3 lanes enabled in IP.
                  1 2 3 4 - For 4 lanes enabled in IP.
                items:
                  - const: 1
                  - const: 2
                  - const: 3
                  - const: 4

              remote-endpoint: true

            required:
              - data-lanes
              - remote-endpoint

            additionalProperties: false

        additionalProperties: false

      port@1:
        type: object
        description: |
          Output / source port node, endpoint describing modules
          connected the CSI-2 receiver.

        properties:

          reg:
            const: 1

          endpoint:
            type: object

            properties:

              remote-endpoint: true

            required:
              - remote-endpoint

            additionalProperties: false

        additionalProperties: false

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

allOf:
  - if:
      required:
        - xlnx,vfb
    then:
      required:
        - xlnx,csi-pxl-format
    else:
      properties:
        xlnx,csi-pxl-format: false

  - if:
      not:
        required:
          - xlnx,en-csi-v2-0
    then:
      properties:
        xlnx,en-vcx: false

additionalProperties: false

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>
    xcsi2rxss_1: csi2rx@a0020000 {
        compatible = "xlnx,mipi-csi2-rx-subsystem-5.0";
        reg = <0xa0020000 0x10000>;
        interrupt-parent = <&gic>;
        interrupts = <0 95 4>;
        xlnx,csi-pxl-format = <0x2a>;
        xlnx,vfb;
        xlnx,en-active-lanes;
        xlnx,en-csi-v2-0;
        xlnx,en-vcx;
        clock-names = "lite_aclk", "video_aclk";
        clocks = <&misc_clk_0>, <&misc_clk_1>;
        video-reset-gpios = <&gpio 86 GPIO_ACTIVE_LOW>;

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

            port@0 {
                /* Sink port */
                reg = <0>;
                csiss_in: endpoint {
                    data-lanes = <1 2 3 4>;
                    /* MIPI CSI-2 Camera handle */
                    remote-endpoint = <&camera_out>;
                };
            };
            port@1 {
                /* Source port */
                reg = <1>;
                csiss_out: endpoint {
                    remote-endpoint = <&vproc_in>;
                };
            };
        };
    };
...