1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/media/i2c/techwell,tw9900.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Techwell TW9900 NTSC/PAL video decoder
8
9 maintainers:
10 - Mehdi Djait <mehdi.djait@bootlin.com>
11
12 description:
13 The tw9900 is a multi-standard video decoder, supporting NTSC, PAL standards
14 with auto-detection features.
15
16 properties:
17 compatible:
18 const: techwell,tw9900
19
20 reg:
21 maxItems: 1
22
23 vdd-supply:
24 description: VDD power supply
25
26 reset-gpios:
27 description: GPIO descriptor for the RESET input pin
28 maxItems: 1
29
30 powerdown-gpios:
31 description: GPIO descriptor for the POWERDOWN input pin
32 maxItems: 1
33
34 ports:
35 $ref: /schemas/graph.yaml#/properties/ports
36
37 properties:
38 port@0:
39 $ref: /schemas/graph.yaml#/properties/port
40 description: Analog input port
41
42 properties:
43 endpoint@0:
44 $ref: /schemas/graph.yaml#/properties/endpoint
45 description: CVBS over MUX0
46
47 endpoint@1:
48 $ref: /schemas/graph.yaml#/properties/endpoint
49 description: CVBS over MUX1
50
51 endpoint@2:
52 $ref: /schemas/graph.yaml#/properties/endpoint
53 description: Chroma over CIN0 and Y over MUX0
54
55 endpoint@3:
56 $ref: /schemas/graph.yaml#/properties/endpoint
57 description: Chroma over CIN0 and Y over MUX1
58
59 oneOf:
60 - required:
61 - endpoint@0
62 - required:
63 - endpoint@1
64 - required:
65 - endpoint@2
66 - required:
67 - endpoint@3
68
69 port@1:
70 $ref: /schemas/graph.yaml#/properties/port
71 description: Video port for the decoder output.
72
73
74 required:
75 - port@0
76 - port@1
77
78 required:
79 - compatible
80 - ports
81 - reg
82 - vdd-supply
83
84 additionalProperties: false
85
86 examples:
87 - |
88 #include <dt-bindings/display/sdtv-standards.h>
89 #include <dt-bindings/gpio/gpio.h>
90
91 composite_connector {
92 compatible = "composite-video-connector";
93 label = "tv";
94 sdtv-standards = <(SDTV_STD_PAL | SDTV_STD_NTSC)>;
95
96 port {
97 composite_to_tw9900: endpoint {
98 remote-endpoint = <&tw9900_to_composite>;
99 };
100 };
101 };
102
103 i2c {
104 #address-cells = <1>;
105 #size-cells = <0>;
106
107 video-decoder@44 {
108 compatible = "techwell,tw9900";
109 reg = <0x44>;
110
111 vdd-supply = <&tw9900_supply>;
112 reset-gpios = <&gpio2 5 GPIO_ACTIVE_LOW>;
113
114 ports {
115 #address-cells = <1>;
116 #size-cells = <0>;
117
118 port@0 {
119 #address-cells = <1>;
120 #size-cells = <0>;
121
122 reg = <0>;
123 tw9900_to_composite: endpoint@0 {
124 reg = <0>;
125 remote-endpoint = <&composite_to_tw9900>;
126 };
127 };
128
129 port@1 {
130 reg = <1>;
131 endpoint {
132 remote-endpoint = <&cif_in>;
133 };
134 };
135 };
136 };
137 };
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