linux-arkmicro/linux/Documentation/devicetree/bindings/display/panel/panel-lvds.txt

LVDS Display Panel
==================

LVDS is a physical layer specification defined in ANSI/TIA/EIA-644-A. Multiple
incompatible data link layers have been used over time to transmit image data
to LVDS panels. This bindings supports display panels compatible with the
following specifications.

[JEIDA] "Digital Interface Standards for Monitor", JEIDA-59-1999, February
1999 (Version 1.0), Japan Electronic Industry Development Association (JEIDA)
[LDI] "Open LVDS Display Interface", May 1999 (Version 0.95), National
Semiconductor
[VESA] "VESA Notebook Panel Standard", October 2007 (Version 1.0), Video
Electronics Standards Association (VESA)

Device compatible with those specifications have been marketed under the
FPD-Link and FlatLink brands.


Required properties:

- compatible: Shall contain "panel-lvds" in addition to a mandatory
  panel-specific compatible string defined in individual panel bindings. The
  "panel-lvds" value shall never be used on its own.
- width-mm: See panel-common.txt.
- height-mm: See panel-common.txt.
- data-mapping: The color signals mapping order, "jeida-18", "jeida-24"
  or "vesa-24".

Optional properties:

- label: See panel-common.txt.
- gpios: See panel-common.txt.
- backlight: See panel-common.txt.
- power-supply: See panel-common.txt.
- data-mirror: If set, reverse the bit order described in the data mappings
  below on all data lanes, transmitting bits for slots 6 to 0 instead of
  0 to 6.

Required nodes:

- panel-timing: See panel-common.txt.
- ports: See panel-common.txt. These bindings require a single port subnode
  corresponding to the panel LVDS input.


LVDS data mappings are defined as follows.

- "jeida-18" - 18-bit data mapping compatible with the [JEIDA], [LDI] and
  [VESA] specifications. Data are transferred as follows on 3 LVDS lanes.

Slot	    0       1       2       3       4       5       6
	________________                         _________________
Clock	                \_______________________/
	  ______  ______  ______  ______  ______  ______  ______
DATA0	><__G0__><__R5__><__R4__><__R3__><__R2__><__R1__><__R0__><
DATA1	><__B1__><__B0__><__G5__><__G4__><__G3__><__G2__><__G1__><
DATA2	><_CTL2_><_CTL1_><_CTL0_><__B5__><__B4__><__B3__><__B2__><

- "jeida-24" - 24-bit data mapping compatible with the [DSIM] and [LDI]
  specifications. Data are transferred as follows on 4 LVDS lanes.

Slot	    0       1       2       3       4       5       6
	________________                         _________________
Clock	                \_______________________/
	  ______  ______  ______  ______  ______  ______  ______
DATA0	><__G2__><__R7__><__R6__><__R5__><__R4__><__R3__><__R2__><
DATA1	><__B3__><__B2__><__G7__><__G6__><__G5__><__G4__><__G3__><
DATA2	><_CTL2_><_CTL1_><_CTL0_><__B7__><__B6__><__B5__><__B4__><
DATA3	><_CTL3_><__B1__><__B0__><__G1__><__G0__><__R1__><__R0__><

- "vesa-24" - 24-bit data mapping compatible with the [VESA] specification.
  Data are transferred as follows on 4 LVDS lanes.

Slot	    0       1       2       3       4       5       6
	________________                         _________________
Clock	                \_______________________/
	  ______  ______  ______  ______  ______  ______  ______
DATA0	><__G0__><__R5__><__R4__><__R3__><__R2__><__R1__><__R0__><
DATA1	><__B1__><__B0__><__G5__><__G4__><__G3__><__G2__><__G1__><
DATA2	><_CTL2_><_CTL1_><_CTL0_><__B5__><__B4__><__B3__><__B2__><
DATA3	><_CTL3_><__B7__><__B6__><__G7__><__G6__><__R7__><__R6__><

Control signals are mapped as follows.

CTL0: HSync
CTL1: VSync
CTL2: Data Enable
CTL3: 0


Example
-------

panel {
	compatible = "mitsubishi,aa121td01", "panel-lvds";

	width-mm = <261>;
	height-mm = <163>;

	data-mapping = "jeida-24";

	panel-timing {
		/* 1280x800 @60Hz */
		clock-frequency = <71000000>;
		hactive = <1280>;
		vactive = <800>;
		hsync-len = <70>;
		hfront-porch = <20>;
		hback-porch = <70>;
		vsync-len = <5>;
		vfront-porch = <3>;
		vback-porch = <15>;
	};

	port {
		panel_in: endpoint {
			remote-endpoint = <&lvds_encoder>;
		};
	};
};