Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/contrib/device-tree/Bindings/display/bridge/renesas,lvds.txt
48406 views
1
Renesas R-Car LVDS Encoder

2
==========================

3


4
These DT bindings describe the LVDS encoder embedded in the Renesas R-Car

5
Gen2, R-Car Gen3 and RZ/G SoCs.

6


7
Required properties:

8


9
- compatible : Shall contain one of

10
  - "renesas,r8a7743-lvds" for R8A7743 (RZ/G1M) compatible LVDS encoders

11
  - "renesas,r8a7744-lvds" for R8A7744 (RZ/G1N) compatible LVDS encoders

12
  - "renesas,r8a774a1-lvds" for R8A774A1 (RZ/G2M) compatible LVDS encoders

13
  - "renesas,r8a774b1-lvds" for R8A774B1 (RZ/G2N) compatible LVDS encoders

14
  - "renesas,r8a774c0-lvds" for R8A774C0 (RZ/G2E) compatible LVDS encoders

15
  - "renesas,r8a7790-lvds" for R8A7790 (R-Car H2) compatible LVDS encoders

16
  - "renesas,r8a7791-lvds" for R8A7791 (R-Car M2-W) compatible LVDS encoders

17
  - "renesas,r8a7793-lvds" for R8A7793 (R-Car M2-N) compatible LVDS encoders

18
  - "renesas,r8a7795-lvds" for R8A7795 (R-Car H3) compatible LVDS encoders

19
  - "renesas,r8a7796-lvds" for R8A7796 (R-Car M3-W) compatible LVDS encoders

20
  - "renesas,r8a77965-lvds" for R8A77965 (R-Car M3-N) compatible LVDS encoders

21
  - "renesas,r8a77970-lvds" for R8A77970 (R-Car V3M) compatible LVDS encoders

22
  - "renesas,r8a77980-lvds" for R8A77980 (R-Car V3H) compatible LVDS encoders

23
  - "renesas,r8a77990-lvds" for R8A77990 (R-Car E3) compatible LVDS encoders

24
  - "renesas,r8a77995-lvds" for R8A77995 (R-Car D3) compatible LVDS encoders

25


26
- reg: Base address and length for the memory-mapped registers

27
- clocks: A list of phandles + clock-specifier pairs, one for each entry in

28
  the clock-names property.

29
- clock-names: Name of the clocks. This property is model-dependent.

30
  - The functional clock, which mandatory for all models, shall be listed

31
    first, and shall be named "fck".

32
  - On R8A77990, R8A77995 and R8A774C0, the LVDS encoder can use the EXTAL or

33
    DU_DOTCLKINx clocks. Those clocks are optional. When supplied they must be

34
    named "extal" and "dclkin.x" respectively, with "x" being the DU_DOTCLKIN

35
    numerical index.

36
  - When the clocks property only contains the functional clock, the

37
    clock-names property may be omitted.

38
- resets: A phandle + reset specifier for the module reset

39


40
Required nodes:

41


42
The LVDS encoder has two video ports. Their connections are modelled using the

43
OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.

44


45
- Video port 0 corresponds to the parallel RGB input

46
- Video port 1 corresponds to the LVDS output

47


48
Each port shall have a single endpoint.

49


50
Optional properties:

51


52
- renesas,companion : phandle to the companion LVDS encoder. This property is

53
  mandatory for the first LVDS encoder on D3 and E3 SoCs, and shall point to

54
  the second encoder to be used as a companion in dual-link mode. It shall not

55
  be set for any other LVDS encoder.

56


57


58
Example:

59


60
	lvds0: lvds@feb90000 {

61
		compatible = "renesas,r8a77990-lvds";

62
		reg = <0 0xfeb90000 0 0x20>;

63
		clocks = <&cpg CPG_MOD 727>;

64
		power-domains = <&sysc R8A77990_PD_ALWAYS_ON>;

65
		resets = <&cpg 727>;

66


67
		renesas,companion = <&lvds1>;

68


69
		ports {

70
			#address-cells = <1>;

71
			#size-cells = <0>;

72


73
			port@0 {

74
				reg = <0>;

75
				lvds0_in: endpoint {

76
					remote-endpoint = <&du_out_lvds0>;

77
				};

78
			};

79
			port@1 {

80
				reg = <1>;

81
				lvds0_out: endpoint {

82
				};

83
			};

84
		};

85
	};

86


87