| # 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>; |
| }; |