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    $ref: /schemas/graph.yaml#/properties/ports
49
50    properties:
51      port@0:
52        $ref: /schemas/graph.yaml#/$defs/port-base
53        description: |
54          For LVDS encoders, port 0 is the parallel input
55          For LVDS decoders, port 0 is the LVDS input
56
57        properties:
58          endpoint:
59            $ref: /schemas/media/video-interfaces.yaml#
60            unevaluatedProperties: false
61
62            properties:
63              data-mapping:
64                enum:
65                  - jeida-18
66                  - jeida-24
67                  - vesa-24
68                description: |
69                  The color signals mapping order. See details in
70                  Documentation/devicetree/bindings/display/panel/lvds.yaml
71
72      port@1:
73        $ref: /schemas/graph.yaml#/properties/port
74        description: |
75          For LVDS encoders, port 1 is the LVDS output
76          For LVDS decoders, port 1 is the parallel output
77
78    required:
79      - port@0
80      - port@1
81
82  powerdown-gpios:
83    description:
84      The GPIO used to control the power down line of this device.
85    maxItems: 1
86
87  power-supply: true
88
89if:
90  not:
91    properties:
92      compatible:
93        contains:
94          const: lvds-decoder
95then:
96  properties:
97    ports:
98      properties:
99        port@0:
100          properties:
101            endpoint:
102              properties:
103                data-mapping: false
104
105required:
106  - compatible
107  - ports
108
109additionalProperties: false
110
111
112examples:
113  - |
114    lvds-encoder {
115      compatible = "ti,ds90c185", "lvds-encoder";
116
117      ports {
118        #address-cells = <1>;
119        #size-cells = <0>;
120
121        port@0 {
122          reg = <0>;
123
124          lvds_enc_in: endpoint {
125            remote-endpoint = <&display_out_rgb>;
126          };
127        };
128
129        port@1 {
130          reg = <1>;
131
132          lvds_enc_out: endpoint {
133            remote-endpoint = <&lvds_panel_in>;
134          };
135        };
136      };
137    };
138
139  - |
140    lvds-decoder {
141      compatible = "ti,ds90cf384a", "lvds-decoder";
142
143      ports {
144        #address-cells = <1>;
145        #size-cells = <0>;
146
147        port@0 {
148          reg = <0>;
149
150          lvds_dec_in: endpoint {
151            remote-endpoint = <&display_out_lvds>;
152          };
153        };
154
155        port@1 {
156          reg = <1>;
157
158          lvds_dec_out: endpoint {
159            remote-endpoint = <&rgb_panel_in>;
160          };
161        };
162      };
163    };
164
165...
166