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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Unisoc DRM master device
maintainers:
- Kevin Tang <kevin.tang@unisoc.com>
description: |
The Unisoc DRM master device is a virtual device needed to list all
DPU devices or other display interface nodes that comprise the
graphics subsystem.
Unisoc's display pipeline have several components as below description,
multi display controllers and corresponding physical interfaces.
For different display scenarios, dpu0 and dpu1 maybe binding to different
encoder.
E.g:
dpu0 and dpu1 both binding to DSI for dual mipi-dsi display;
dpu0 binding to DSI for primary display, and dpu1 binding to DP for external display;
+-----------------------------------------+
| |
| +---------+ |
+----+ | +----+ +---------+ |DPHY/CPHY| | +------+
| +----->+dpu0+--->+MIPI|DSI +--->+Combo +----->+Panel0|
|AXI | | +----+ +---------+ +---------+ | +------+
| | | ^ |
| | | | |
| | | +-----------+ |
| | | | |
|APB | | +--+-+ +-----------+ +---+ | +------+
| +----->+dpu1+--->+DisplayPort+--->+PHY+--------->+Panel1|
| | | +----+ +-----------+ +---+ | +------+
+----+ | |
+-----------------------------------------+
properties:
compatible:
const: sprd,display-subsystem
ports:
$ref: /schemas/types.yaml#/definitions/phandle-array
items:
maxItems: 1
description:
Should contain a list of phandles pointing to display interface port
of DPU devices.
required:
- compatible
- ports
additionalProperties: false
examples:
- |
display-subsystem {
compatible = "sprd,display-subsystem";
ports = <&dpu_out>;
};
|
