tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/display/allwinner,sun4i-a10-display-engine.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Allwinner A10 Display Engine Pipeline Device Tree Bindings
8
9maintainers:
10 - Chen-Yu Tsai <wens@csie.org>
11 - Maxime Ripard <mripard@kernel.org>
12
13description: |
14 The display engine pipeline (and its entry point, since it can be
15 either directly the backend or the frontend) is represented as an
16 extra node.
17
18 The Allwinner A10 Display pipeline is composed of several components
19 that are going to be documented below:
20
21 For all connections between components up to the TCONs in the
22 display pipeline, when there are multiple components of the same
23 type at the same depth, the local endpoint ID must be the same as
24 the remote component's index. For example, if the remote endpoint is
25 Frontend 1, then the local endpoint ID must be 1.
26
27 Frontend 0 [0] ------- [0] Backend 0 [0] ------- [0] TCON 0
28 [1] -- -- [1] [1] -- -- [1]
29 \ / \ /
30 X X
31 / \ / \
32 [0] -- -- [0] [0] -- -- [0]
33 Frontend 1 [1] ------- [1] Backend 1 [1] ------- [1] TCON 1
34
35 For a two pipeline system such as the one depicted above, the lines
36 represent the connections between the components, while the numbers
37 within the square brackets corresponds to the ID of the local endpoint.
38
39 The same rule also applies to DE 2.0 mixer-TCON connections:
40
41 Mixer 0 [0] ----------- [0] TCON 0
42 [1] ---- ---- [1]
43 \ /
44 X
45 / \
46 [0] ---- ---- [0]
47 Mixer 1 [1] ----------- [1] TCON 1
48
49properties:
50 compatible:
51 enum:
52 - allwinner,sun4i-a10-display-engine
53 - allwinner,sun5i-a10s-display-engine
54 - allwinner,sun5i-a13-display-engine
55 - allwinner,sun6i-a31-display-engine
56 - allwinner,sun6i-a31s-display-engine
57 - allwinner,sun7i-a20-display-engine
58 - allwinner,sun8i-a23-display-engine
59 - allwinner,sun8i-a33-display-engine
60 - allwinner,sun8i-a83t-display-engine
61 - allwinner,sun8i-h3-display-engine
62 - allwinner,sun8i-r40-display-engine
63 - allwinner,sun8i-v3s-display-engine
64 - allwinner,sun9i-a80-display-engine
65 - allwinner,sun50i-a64-display-engine
66 - allwinner,sun50i-h6-display-engine
67
68 allwinner,pipelines:
69 $ref: /schemas/types.yaml#/definitions/phandle-array
70 minItems: 1
71 maxItems: 2
72 items:
73 maxItems: 1
74 description: |
75 Available display engine frontends (DE 1.0) or mixers (DE
76 2.0/3.0) available.
77
78required:
79 - compatible
80 - allwinner,pipelines
81
82additionalProperties: false
83
84if:
85 properties:
86 compatible:
87 contains:
88 enum:
89 - allwinner,sun4i-a10-display-engine
90 - allwinner,sun6i-a31-display-engine
91 - allwinner,sun6i-a31s-display-engine
92 - allwinner,sun7i-a20-display-engine
93 - allwinner,sun8i-a83t-display-engine
94 - allwinner,sun8i-r40-display-engine
95 - allwinner,sun9i-a80-display-engine
96 - allwinner,sun50i-a64-display-engine
97
98then:
99 properties:
100 allwinner,pipelines:
101 minItems: 2
102
103else:
104 properties:
105 allwinner,pipelines:
106 maxItems: 1
107
108examples:
109 - |
110 de: display-engine {
111 compatible = "allwinner,sun4i-a10-display-engine";
112 allwinner,pipelines = <&fe0>, <&fe1>;
113 };
114
115...