megachips,stdp2690-ge-b850v3-fw.yaml

  1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
  2%YAML 1.2
  3---
  4$id: http://devicetree.org/schemas/display/bridge/megachips,stdp2690-ge-b850v3-fw.yaml#
  5$schema: http://devicetree.org/meta-schemas/core.yaml#
  6
  7title: GE B850v3 video bridge
  8
  9maintainers:
 10  - Frank Li <Frank.Li@nxp.com>
 11
 12description: |
 13   STDP4028-ge-b850v3-fw bridges (LVDS-DP)
 14   STDP2690-ge-b850v3-fw bridges (DP-DP++)
 15
 16   The video processing pipeline on the second output on the GE B850v3:
 17
 18   Host -> LVDS|--(STDP4028)--|DP -> DP|--(STDP2690)--|DP++ -> Video output
 19
 20   Each bridge has a dedicated flash containing firmware for supporting the custom
 21   design. The result is that, in this design, neither the STDP4028 nor the
 22   STDP2690 behave as the stock bridges would. The compatible strings include the
 23   suffix "-ge-b850v3-fw" to make it clear that the driver is for the bridges with
 24   the firmware specific for the GE B850v3.
 25
 26   The hardware do not provide control over the video processing pipeline, as the
 27   two bridges behaves as a single one. The only interfaces exposed by the
 28   hardware are EDID, HPD, and interrupts.
 29
 30properties:
 31  compatible:
 32    enum:
 33      - megachips,stdp4028-ge-b850v3-fw
 34      - megachips,stdp2690-ge-b850v3-fw
 35
 36  reg:
 37    maxItems: 1
 38
 39  interrupts:
 40    maxItems: 1
 41
 42  ports:
 43    $ref: /schemas/graph.yaml#/properties/ports
 44    properties:
 45      port@0:
 46        description: sink port
 47        $ref: /schemas/graph.yaml#/properties/port
 48
 49      port@1:
 50        description: source port
 51        $ref: /schemas/graph.yaml#/properties/port
 52
 53    required:
 54      - port@0
 55      - port@1
 56
 57required:
 58  - compatible
 59  - reg
 60  - ports
 61
 62allOf:
 63  - if:
 64      properties:
 65        compatible:
 66          contains:
 67            const: megachips,stdp4028-ge-b850v3-fw
 68    then:
 69      required:
 70        - interrupts
 71
 72additionalProperties: false
 73
 74examples:
 75  - |
 76    #include <dt-bindings/interrupt-controller/irq.h>
 77
 78    i2c {
 79        #address-cells = <1>;
 80        #size-cells = <0>;
 81
 82        bridge@73 {
 83            compatible = "megachips,stdp4028-ge-b850v3-fw";
 84            reg = <0x73>;
 85            interrupt-parent = <&gpio2>;
 86            interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
 87
 88            ports {
 89                #address-cells = <1>;
 90                #size-cells = <0>;
 91
 92                port@0 {
 93                    reg = <0>;
 94
 95                    endpoint {
 96                        remote-endpoint = <&lvds0_out>;
 97                    };
 98
 99                };
100
101                port@1 {
102                    reg = <1>;
103
104                    endpoint {
105                        remote-endpoint = <&stdp2690_in>;
106                    };
107               };
108            };
109        };
110    };
111