Documentation/devicetree/bindings/display/bridge/lvds-codec.yaml

   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
   7 title: Transparent LVDS encoders and decoders
   8
   9 maintainers:
  10   - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
  11
  12 description: |
  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
  31 properties:
  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#/properties/port
  53         description: |
  54           For LVDS encoders, port 0 is the parallel input
  55           For LVDS decoders, port 0 is the LVDS input
  56
  57       port@1:
  58         $ref: /schemas/graph.yaml#/properties/port
  59         description: |
  60           For LVDS encoders, port 1 is the LVDS output
  61           For LVDS decoders, port 1 is the parallel output
  62
  63     required:
  64       - port@0
  65       - port@1
  66
  67   powerdown-gpios:
  68     description:
  69       The GPIO used to control the power down line of this device.
  70     maxItems: 1
  71
  72   power-supply: true
  73
  74 required:
  75   - compatible
  76   - ports
  77
  78 additionalProperties: false
  79
  80
  81 examples:
  82   - |
  83     lvds-encoder {
  84       compatible = "ti,ds90c185", "lvds-encoder";
  85
  86       ports {
  87         #address-cells = <1>;
  88         #size-cells = <0>;
  89
  90         port@0 {
  91           reg = <0>;
  92
  93           lvds_enc_in: endpoint {
  94             remote-endpoint = <&display_out_rgb>;
  95           };
  96         };
  97
  98         port@1 {
  99           reg = <1>;
 100
 101           lvds_enc_out: endpoint {
 102             remote-endpoint = <&lvds_panel_in>;
 103           };
 104         };
 105       };
 106     };
 107
 108   - |
 109     lvds-decoder {
 110       compatible = "ti,ds90cf384a", "lvds-decoder";
 111
 112       ports {
 113         #address-cells = <1>;
 114         #size-cells = <0>;
 115
 116         port@0 {
 117           reg = <0>;
 118
 119           lvds_dec_in: endpoint {
 120             remote-endpoint = <&display_out_lvds>;
 121           };
 122         };
 123
 124         port@1 {
 125           reg = <1>;
 126
 127           lvds_dec_out: endpoint {
 128             remote-endpoint = <&rgb_panel_in>;
 129           };
 130         };
 131       };
 132     };
 133
 134 ...