xref: /linux/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml (revision 6f3562b3bca078b40aa198db8fdc68439b7b0399) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/display/mediatek/mediatek,dp.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: MediaTek Display Port Controller
8
9maintainers:
10  - Chun-Kuang Hu <chunkuang.hu@kernel.org>
11  - Jitao shi <jitao.shi@mediatek.com>
12
13description: |
14  MediaTek DP and eDP are different hardwares and there are some features
15  which are not supported for eDP. For example, audio is not supported for
16  eDP. Therefore, we need to use two different compatibles to describe them.
17  In addition, We just need to enable the power domain of DP, so the clock
18  of DP is generated by itself and we are not using other PLL to generate
19  clocks.
20
21properties:
22  compatible:
23    enum:
24      - mediatek,mt8195-dp-tx
25      - mediatek,mt8195-edp-tx
26
27  reg:
28    maxItems: 1
29
30  nvmem-cells:
31    maxItems: 1
32    description: efuse data for display port calibration
33
34  nvmem-cell-names:
35    const: dp_calibration_data
36
37  power-domains:
38    maxItems: 1
39
40  interrupts:
41    maxItems: 1
42
43  ports:
44    $ref: /schemas/graph.yaml#/properties/ports
45    properties:
46      port@0:
47        $ref: /schemas/graph.yaml#/properties/port
48        description: Input endpoint of the controller, usually dp_intf
49
50      port@1:
51        $ref: /schemas/graph.yaml#/$defs/port-base
52        unevaluatedProperties: false
53        description: Output endpoint of the controller
54        properties:
55          endpoint:
56            $ref: /schemas/media/video-interfaces.yaml#
57            unevaluatedProperties: false
58            properties:
59              data-lanes:
60                description: |
61                  number of lanes supported by the hardware.
62                  The possible values:
63                  0       - For 1 lane enabled in IP.
64                  0 1     - For 2 lanes enabled in IP.
65                  0 1 2 3 - For 4 lanes enabled in IP.
66                minItems: 1
67                maxItems: 4
68            required:
69              - data-lanes
70
71    required:
72      - port@0
73      - port@1
74
75  max-linkrate-mhz:
76    enum: [ 1620, 2700, 5400, 8100 ]
77    description: maximum link rate supported by the hardware.
78
79required:
80  - compatible
81  - reg
82  - interrupts
83  - ports
84  - max-linkrate-mhz
85
86additionalProperties: false
87
88examples:
89  - |
90    #include <dt-bindings/interrupt-controller/arm-gic.h>
91    #include <dt-bindings/power/mt8195-power.h>
92    dptx@1c600000 {
93        compatible = "mediatek,mt8195-dp-tx";
94        reg = <0x1c600000 0x8000>;
95        power-domains = <&spm MT8195_POWER_DOMAIN_DP_TX>;
96        interrupts = <GIC_SPI 458 IRQ_TYPE_LEVEL_HIGH 0>;
97        max-linkrate-mhz = <8100>;
98
99        ports {
100            #address-cells = <1>;
101            #size-cells = <0>;
102
103            port@0 {
104                reg = <0>;
105                dptx_in: endpoint {
106                    remote-endpoint = <&dp_intf0_out>;
107                };
108            };
109            port@1 {
110                reg = <1>;
111                dptx_out: endpoint {
112                    data-lanes = <0 1 2 3>;
113                };
114            };
115        };
116    };
117