1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Unisoc DRM master device
8
9 maintainers:
10 - Kevin Tang <kevin.tang@unisoc.com>
11
12 description: |
13 The Unisoc DRM master device is a virtual device needed to list all
14 DPU devices or other display interface nodes that comprise the
15 graphics subsystem.
16
17 Unisoc's display pipeline have several components as below description,
18 multi display controllers and corresponding physical interfaces.
19 For different display scenarios, dpu0 and dpu1 maybe binding to different
20 encoder.
21
22 E.g:
23 dpu0 and dpu1 both binding to DSI for dual mipi-dsi display;
24 dpu0 binding to DSI for primary display, and dpu1 binding to DP for external display;
25
26 +-----------------------------------------+
27 | |
28 | +---------+ |
29 +----+ | +----+ +---------+ |DPHY/CPHY| | +------+
30 | +----->+dpu0+--->+MIPI|DSI +--->+Combo +----->+Panel0|
31 |AXI | | +----+ +---------+ +---------+ | +------+
32 | | | ^ |
33 | | | | |
34 | | | +-----------+ |
35 | | | | |
36 |APB | | +--+-+ +-----------+ +---+ | +------+
37 | +----->+dpu1+--->+DisplayPort+--->+PHY+--------->+Panel1|
38 | | | +----+ +-----------+ +---+ | +------+
39 +----+ | |
40 +-----------------------------------------+
41
42 properties:
43 compatible:
44 const: sprd,display-subsystem
45
46 ports:
47 $ref: /schemas/types.yaml#/definitions/phandle-array
48 items:
49 maxItems: 1
50 description:
51 Should contain a list of phandles pointing to display interface port
52 of DPU devices.
53
54 required:
55 - compatible
56 - ports
57
58 additionalProperties: false
59
60 examples:
61 - |
62 display-subsystem {
63 compatible = "sprd,display-subsystem";
64 ports = <&dpu_out>;
65 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.