xref: /linux/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.yaml (revision 0a94608f0f7de9b1135ffea3546afe68eafef57f) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/display/mediatek/mediatek,hdmi.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Mediatek HDMI Encoder Device Tree Bindings
8
9maintainers:
10  - CK Hu <ck.hu@mediatek.com>
11  - Jitao shi <jitao.shi@mediatek.com>
12
13description: |
14  The Mediatek HDMI encoder can generate HDMI 1.4a or MHL 2.0 signals from
15  its parallel input.
16
17properties:
18  compatible:
19    enum:
20      - mediatek,mt2701-hdmi
21      - mediatek,mt7623-hdmi
22      - mediatek,mt8167-hdmi
23      - mediatek,mt8173-hdmi
24
25  reg:
26    maxItems: 1
27
28  interrupts:
29    maxItems: 1
30
31  clocks:
32    items:
33      - description: Pixel Clock
34      - description: HDMI PLL
35      - description: Bit Clock
36      - description: S/PDIF Clock
37
38  clock-names:
39    items:
40      - const: pixel
41      - const: pll
42      - const: bclk
43      - const: spdif
44
45  phys:
46    maxItems: 1
47
48  phy-names:
49    items:
50      - const: hdmi
51
52  mediatek,syscon-hdmi:
53    $ref: '/schemas/types.yaml#/definitions/phandle-array'
54    items:
55      - items:
56          - description: phandle to system configuration registers
57          - description: register offset in the system configuration registers
58    description: |
59      phandle link and register offset to the system configuration registers.
60
61  ports:
62    $ref: /schemas/graph.yaml#/properties/ports
63
64    properties:
65      port@0:
66        $ref: /schemas/graph.yaml#/properties/port
67        description: |
68          Input port node. This port should be connected to a DPI output port.
69
70      port@1:
71        $ref: /schemas/graph.yaml#/properties/port
72        description: |
73          Output port node. This port should be connected to the input port of a connector
74          node that contains a ddc-i2c-bus property, or to the  input port of an attached
75          bridge chip, such as a SlimPort transmitter.
76
77    required:
78      - port@0
79      - port@1
80
81required:
82  - compatible
83  - reg
84  - interrupts
85  - clocks
86  - clock-names
87  - phys
88  - phy-names
89  - mediatek,syscon-hdmi
90  - ports
91
92additionalProperties: false
93
94examples:
95  - |
96    #include <dt-bindings/clock/mt8173-clk.h>
97    #include <dt-bindings/interrupt-controller/arm-gic.h>
98    #include <dt-bindings/interrupt-controller/irq.h>
99    hdmi0: hdmi@14025000 {
100        compatible = "mediatek,mt8173-hdmi";
101        reg = <0x14025000 0x400>;
102        interrupts = <GIC_SPI 206 IRQ_TYPE_LEVEL_LOW>;
103        clocks = <&mmsys CLK_MM_HDMI_PIXEL>,
104             <&mmsys CLK_MM_HDMI_PLLCK>,
105             <&mmsys CLK_MM_HDMI_AUDIO>,
106             <&mmsys CLK_MM_HDMI_SPDIF>;
107        clock-names = "pixel", "pll", "bclk", "spdif";
108        pinctrl-names = "default";
109        pinctrl-0 = <&hdmi_pin>;
110        phys = <&hdmi_phy>;
111        phy-names = "hdmi";
112        mediatek,syscon-hdmi = <&mmsys 0x900>;
113
114        ports {
115          #address-cells = <1>;
116          #size-cells = <0>;
117
118          port@0 {
119            reg = <0>;
120
121            hdmi0_in: endpoint {
122              remote-endpoint = <&dpi0_out>;
123            };
124          };
125
126          port@1 {
127            reg = <1>;
128
129            hdmi0_out: endpoint {
130              remote-endpoint = <&hdmi_con_in>;
131            };
132          };
133        };
134    };
135
136...
137