1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/display/st,stm32mp25-lvds.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: STMicroelectronics STM32 LVDS Display Interface Transmitter
8
9 maintainers:
10 - Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
11 - Yannick Fertre <yannick.fertre@foss.st.com>
12
13 description: |
14 The STMicroelectronics STM32 LVDS Display Interface Transmitter handles the
15 LVDS protocol: it maps the pixels received from the upstream Pixel-DMA (LTDC)
16 onto the LVDS PHY.
17
18 It is composed of three sub blocks:
19 - LVDS host: handles the LVDS protocol (FPD / OpenLDI) and maps its input
20 pixels onto the data lanes of the PHY
21 - LVDS PHY: parallelize the data and drives the LVDS data lanes
22 - LVDS wrapper: handles top-level settings
23
24 The LVDS controller driver supports the following high-level features:
25 - FDP-Link-I and OpenLDI (v0.95) protocols
26 - Single-Link or Dual-Link operation
27 - Single-Display or Double-Display (with the same content duplicated on both)
28 - Flexible Bit-Mapping, including JEIDA and VESA
29 - RGB888 or RGB666 output
30 - Synchronous design, with one input pixel per clock cycle
31
32 properties:
33 compatible:
34 const: st,stm32mp25-lvds
35
36 "#clock-cells":
37 const: 0
38 description:
39 Provides the internal LVDS PHY clock to the framework.
40
41 reg:
42 maxItems: 1
43
44 clocks:
45 items:
46 - description: APB peripheral clock
47 - description: Reference clock for the internal PLL
48
49 clock-names:
50 items:
51 - const: pclk
52 - const: ref
53
54 resets:
55 maxItems: 1
56
57 ports:
58 $ref: /schemas/graph.yaml#/properties/ports
59
60 properties:
61 port@0:
62 $ref: /schemas/graph.yaml#/properties/port
63 description:
64 LVDS input port node, connected to the LTDC RGB output port.
65
66 port@1:
67 $ref: /schemas/graph.yaml#/properties/port
68 description:
69 LVDS output port node, connected to a panel or bridge input port.
70
71 required:
72 - port@0
73 - port@1
74
75 required:
76 - compatible
77 - "#clock-cells"
78 - reg
79 - clocks
80 - clock-names
81 - resets
82 - ports
83
84 additionalProperties: false
85
86 examples:
87 - |
88 #include <dt-bindings/clock/st,stm32mp25-rcc.h>
89 #include <dt-bindings/reset/st,stm32mp25-rcc.h>
90
91 lvds: lvds@48060000 {
92 compatible = "st,stm32mp25-lvds";
93 reg = <0x48060000 0x2000>;
94 #clock-cells = <0>;
95 clocks = <&rcc CK_BUS_LVDS>, <&rcc CK_KER_LVDSPHY>;
96 clock-names = "pclk", "ref";
97 resets = <&rcc LVDS_R>;
98
99 ports {
100 #address-cells = <1>;
101 #size-cells = <0>;
102
103 port@0 {
104 reg = <0>;
105 lvds_in: endpoint {
106 remote-endpoint = <<dc_ep1_out>;
107 };
108 };
109
110 port@1 {
111 reg = <1>;
112 lvds_out0: endpoint {
113 remote-endpoint = <&lvds_panel_in>;
114 };
115 };
116 };
117 };
118
119 ...
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