xref: /linux/Documentation/devicetree/bindings/display/bridge/lvds-codec.yaml (revision 726eb70e0d34dc4bc4dada71f52bba8ed638431e) 
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/display/bridge/lvds-codec.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Transparent LVDS encoders and decoders
8
9maintainers:
10  - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
11
12description: |
13  This binding supports transparent LVDS encoders and decoders that don't
14  require any configuration.
15
16  LVDS is a physical layer specification defined in ANSI/TIA/EIA-644-A. Multiple
17  incompatible data link layers have been used over time to transmit image data
18  to LVDS panels. This binding targets devices compatible with the following
19  specifications only.
20
21  [JEIDA] "Digital Interface Standards for Monitor", JEIDA-59-1999, February
22  1999 (Version 1.0), Japan Electronic Industry Development Association (JEIDA)
23  [LDI] "Open LVDS Display Interface", May 1999 (Version 0.95), National
24  Semiconductor
25  [VESA] "VESA Notebook Panel Standard", October 2007 (Version 1.0), Video
26  Electronics Standards Association (VESA)
27
28  Those devices have been marketed under the FPD-Link and FlatLink brand names
29  among others.
30
31properties:
32  compatible:
33    oneOf:
34      - items:
35          - enum:
36              - ti,ds90c185   # For the TI DS90C185 FPD-Link Serializer
37              - ti,ds90c187   # For the TI DS90C187 FPD-Link Serializer
38              - ti,sn75lvds83 # For the TI SN75LVDS83 FlatLink transmitter
39          - const: lvds-encoder # Generic LVDS encoder compatible fallback
40      - items:
41          - enum:
42              - ti,ds90cf384a # For the DS90CF384A FPD-Link LVDS Receiver
43          - const: lvds-decoder # Generic LVDS decoders compatible fallback
44      - enum:
45          - thine,thc63lvdm83d # For the THC63LVDM83D LVDS serializer
46
47  ports:
48    type: object
49    description: |
50      This device has two video ports. Their connections are modeled using the
51      OF graph bindings specified in Documentation/devicetree/bindings/graph.txt
52    properties:
53      '#address-cells':
54        const: 1
55
56      '#size-cells':
57        const: 0
58
59      port@0:
60        type: object
61        description: |
62          For LVDS encoders, port 0 is the parallel input
63          For LVDS decoders, port 0 is the LVDS input
64
65      port@1:
66        type: object
67        description: |
68          For LVDS encoders, port 1 is the LVDS output
69          For LVDS decoders, port 1 is the parallel output
70
71    required:
72      - port@0
73      - port@1
74
75    additionalProperties: false
76
77  powerdown-gpios:
78    description:
79      The GPIO used to control the power down line of this device.
80    maxItems: 1
81
82required:
83  - compatible
84  - ports
85
86additionalProperties: false
87
88
89examples:
90  - |
91    lvds-encoder {
92      compatible = "ti,ds90c185", "lvds-encoder";
93
94      ports {
95        #address-cells = <1>;
96        #size-cells = <0>;
97
98        port@0 {
99          reg = <0>;
100
101          lvds_enc_in: endpoint {
102            remote-endpoint = <&display_out_rgb>;
103          };
104        };
105
106        port@1 {
107          reg = <1>;
108
109          lvds_enc_out: endpoint {
110            remote-endpoint = <&lvds_panel_in>;
111          };
112        };
113      };
114    };
115
116  - |
117    lvds-decoder {
118      compatible = "ti,ds90cf384a", "lvds-decoder";
119
120      ports {
121        #address-cells = <1>;
122        #size-cells = <0>;
123
124        port@0 {
125          reg = <0>;
126
127          lvds_dec_in: endpoint {
128            remote-endpoint = <&display_out_lvds>;
129          };
130        };
131
132        port@1 {
133          reg = <1>;
134
135          lvds_dec_out: endpoint {
136            remote-endpoint = <&rgb_panel_in>;
137          };
138        };
139      };
140    };
141
142...
143