tjh.dev
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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,ds90cf364a # For the DS90CF364A FPD-Link LVDS Receiver
43 - ti,ds90cf384a # For the DS90CF384A FPD-Link LVDS Receiver
44 - ti,sn65lvds822 # For the SN65LVDS822 FlatLink LVDS Receiver
45 - ti,sn65lvds94 # For the SN65DS94 LVDS serdes
46 - const: lvds-decoder # Generic LVDS decoders compatible fallback
47 - enum:
48 - thine,thc63lvdm83d # For the THC63LVDM83D LVDS serializer
49
50 ports:
51 $ref: /schemas/graph.yaml#/properties/ports
52
53 properties:
54 port@0:
55 $ref: /schemas/graph.yaml#/$defs/port-base
56 unevaluatedProperties: false
57 description: |
58 For LVDS encoders, port 0 is the parallel input
59 For LVDS decoders, port 0 is the LVDS input
60
61 properties:
62 endpoint:
63 $ref: /schemas/media/video-interfaces.yaml#
64 unevaluatedProperties: false
65
66 properties:
67 data-mapping:
68 enum:
69 - jeida-18
70 - jeida-24
71 - vesa-24
72 description: |
73 The color signals mapping order. See details in
74 Documentation/devicetree/bindings/display/lvds.yaml
75
76 port@1:
77 $ref: /schemas/graph.yaml#/properties/port
78 description: |
79 For LVDS encoders, port 1 is the LVDS output
80 For LVDS decoders, port 1 is the parallel output
81
82 required:
83 - port@0
84 - port@1
85
86 pclk-sample:
87 description:
88 Data sampling on rising or falling edge.
89 enum:
90 - 0 # Falling edge
91 - 1 # Rising edge
92 default: 0
93
94 powerdown-gpios:
95 description:
96 The GPIO used to control the power down line of this device.
97 maxItems: 1
98
99 power-supply: true
100
101allOf:
102 - if:
103 not:
104 properties:
105 compatible:
106 contains:
107 const: lvds-decoder
108 then:
109 properties:
110 ports:
111 properties:
112 port@0:
113 properties:
114 endpoint:
115 properties:
116 data-mapping: false
117
118 - if:
119 not:
120 properties:
121 compatible:
122 contains:
123 const: lvds-encoder
124 then:
125 properties:
126 pclk-sample: false
127
128required:
129 - compatible
130 - ports
131
132additionalProperties: false
133
134examples:
135 - |
136 lvds-encoder {
137 compatible = "ti,ds90c185", "lvds-encoder";
138
139 ports {
140 #address-cells = <1>;
141 #size-cells = <0>;
142
143 port@0 {
144 reg = <0>;
145
146 lvds_enc_in: endpoint {
147 remote-endpoint = <&display_out_rgb>;
148 };
149 };
150
151 port@1 {
152 reg = <1>;
153
154 lvds_enc_out: endpoint {
155 remote-endpoint = <&lvds_panel_in>;
156 };
157 };
158 };
159 };
160
161 - |
162 lvds-decoder {
163 compatible = "ti,ds90cf384a", "lvds-decoder";
164
165 ports {
166 #address-cells = <1>;
167 #size-cells = <0>;
168
169 port@0 {
170 reg = <0>;
171
172 lvds_dec_in: endpoint {
173 remote-endpoint = <&display_out_lvds>;
174 };
175 };
176
177 port@1 {
178 reg = <1>;
179
180 lvds_dec_out: endpoint {
181 remote-endpoint = <&rgb_panel_in>;
182 };
183 };
184 };
185 };
186
187...