1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/display/panel/lvds.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: LVDS Display Panel
8
9 maintainers:
10 - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
11 - Thierry Reding <thierry.reding@gmail.com>
12
13 description: |+
14 LVDS is a physical layer specification defined in ANSI/TIA/EIA-644-A. Multiple
15 incompatible data link layers have been used over time to transmit image data
16 to LVDS panels. This bindings supports display panels compatible with the
17 following specifications.
18
19 [JEIDA] "Digital Interface Standards for Monitor", JEIDA-59-1999, February
20 1999 (Version 1.0), Japan Electronic Industry Development Association (JEIDA)
21 [LDI] "Open LVDS Display Interface", May 1999 (Version 0.95), National
22 Semiconductor
23 [VESA] "VESA Notebook Panel Standard", October 2007 (Version 1.0), Video
24 Electronics Standards Association (VESA)
25
26 Device compatible with those specifications have been marketed under the
27 FPD-Link and FlatLink brands.
28
29 allOf:
30 - $ref: panel-common.yaml#
31
32 properties:
33 compatible:
34 contains:
35 const: panel-lvds
36 description:
37 Shall contain "panel-lvds" in addition to a mandatory panel-specific
38 compatible string defined in individual panel bindings. The "panel-lvds"
39 value shall never be used on its own.
40
41 data-mapping:
42 enum:
43 - jeida-18
44 - jeida-24
45 - vesa-24
46 description: |
47 The color signals mapping order.
48
49 LVDS data mappings are defined as follows.
50
51 - "jeida-18" - 18-bit data mapping compatible with the [JEIDA], [LDI] and
52 [VESA] specifications. Data are transferred as follows on 3 LVDS lanes.
53
54 Slot 0 1 2 3 4 5 6
55 ________________ _________________
56 Clock \_______________________/
57 ______ ______ ______ ______ ______ ______ ______
58 DATA0 ><__G0__><__R5__><__R4__><__R3__><__R2__><__R1__><__R0__><
59 DATA1 ><__B1__><__B0__><__G5__><__G4__><__G3__><__G2__><__G1__><
60 DATA2 ><_CTL2_><_CTL1_><_CTL0_><__B5__><__B4__><__B3__><__B2__><
61
62 - "jeida-24" - 24-bit data mapping compatible with the [DSIM] and [LDI]
63 specifications. Data are transferred as follows on 4 LVDS lanes.
64
65 Slot 0 1 2 3 4 5 6
66 ________________ _________________
67 Clock \_______________________/
68 ______ ______ ______ ______ ______ ______ ______
69 DATA0 ><__G2__><__R7__><__R6__><__R5__><__R4__><__R3__><__R2__><
70 DATA1 ><__B3__><__B2__><__G7__><__G6__><__G5__><__G4__><__G3__><
71 DATA2 ><_CTL2_><_CTL1_><_CTL0_><__B7__><__B6__><__B5__><__B4__><
72 DATA3 ><_CTL3_><__B1__><__B0__><__G1__><__G0__><__R1__><__R0__><
73
74 - "vesa-24" - 24-bit data mapping compatible with the [VESA] specification.
75 Data are transferred as follows on 4 LVDS lanes.
76
77 Slot 0 1 2 3 4 5 6
78 ________________ _________________
79 Clock \_______________________/
80 ______ ______ ______ ______ ______ ______ ______
81 DATA0 ><__G0__><__R5__><__R4__><__R3__><__R2__><__R1__><__R0__><
82 DATA1 ><__B1__><__B0__><__G5__><__G4__><__G3__><__G2__><__G1__><
83 DATA2 ><_CTL2_><_CTL1_><_CTL0_><__B5__><__B4__><__B3__><__B2__><
84 DATA3 ><_CTL3_><__B7__><__B6__><__G7__><__G6__><__R7__><__R6__><
85
86 Control signals are mapped as follows.
87
88 CTL0: HSync
89 CTL1: VSync
90 CTL2: Data Enable
91 CTL3: 0
92
93 data-mirror:
94 type: boolean
95 description:
96 If set, reverse the bit order described in the data mappings below on all
97 data lanes, transmitting bits for slots 6 to 0 instead of 0 to 6.
98
99 port: true
100 ports: true
101
102 required:
103 - compatible
104 - data-mapping
105 - width-mm
106 - height-mm
107 - panel-timing
108
109 oneOf:
110 - required:
111 - port
112 - required:
113 - ports
114
115 additionalProperties: true
116
117 ...
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