# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/xlnx/xlnx,zynqmp-dpsub.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Xilinx ZynqMP DisplayPort Subsystem
description: |
The DisplayPort subsystem of Xilinx ZynqMP (Zynq UltraScale+ MPSoC)
implements the display and audio pipelines based on the DisplayPort v1.2
standard. The subsystem includes multiple functional blocks as below:
+------------------------------------------------------------+
+--------+ | +----------------+ +-----------+ |
| DPDMA | --->| | --> | Video | Video +-------------+ |
| 4x vid | | | | | Rendering | -+--> | | | +------+
| 2x aud | | | Audio/Video | --> | Pipeline | | | DisplayPort |---> | PHY0 |
+--------+ | | Buffer Manager | +-----------+ | | Source | | +------+
| | and STC | +-----------+ | | Controller | | +------+
Live Video --->| | --> | Audio | Audio | |---> | PHY1 |
| | | | Mixer | --+-> | | | +------+
Live Audio --->| | --> | | || +-------------+ |
| +----------------+ +-----------+ || |
+---------------------------------------||-------------------+
vv
Blended Video and
Mixed Audio to PL
The Buffer Manager interacts with external interface such as DMA engines or
live audio/video streams from the programmable logic. The Video Rendering
Pipeline blends the video and graphics layers and performs colorspace
conversion. The Audio Mixer mixes the incoming audio streams. The DisplayPort
Source Controller handles the DisplayPort protocol and connects to external
PHYs.
The subsystem supports 2 video and 2 audio streams, and various pixel formats
and depths up to 4K@30 resolution.
Please refer to "Zynq UltraScale+ Device Technical Reference Manual"
(https://www.xilinx.com/support/documentation/user_guides/ug1085-zynq-ultrascale-trm.pdf)
for more details.
maintainers:
- Laurent Pinchart <laurent.pinchart@ideasonboard.com>
properties:
compatible:
const: xlnx,zynqmp-dpsub-1.7
reg:
maxItems: 4
reg-names:
items:
- const: dp
- const: blend
- const: av_buf
- const: aud
interrupts:
maxItems: 1
clocks:
description:
The APB clock and at least one video clock are mandatory, the audio clock
is optional.
minItems: 2
items:
- description: dp_apb_clk is the APB clock
- description: dp_aud_clk is the Audio clock
- description:
dp_vtc_pixel_clk_in is the non-live video clock (from Processing
System)
- description:
dp_live_video_in_clk is the live video clock (from Programmable
Logic)
clock-names:
oneOf:
- minItems: 2
items:
- const: dp_apb_clk
- enum: [ dp_vtc_pixel_clk_in, dp_live_video_in_clk ]
- enum: [ dp_vtc_pixel_clk_in, dp_live_video_in_clk ]
- minItems: 3
items:
- const: dp_apb_clk
- const: dp_aud_clk
- enum: [ dp_vtc_pixel_clk_in, dp_live_video_in_clk ]
- enum: [ dp_vtc_pixel_clk_in, dp_live_video_in_clk ]
power-domains:
maxItems: 1
resets:
maxItems: 1
dmas:
items:
- description: Video layer, plane 0 (RGB or luma)
- description: Video layer, plane 1 (U/V or U)
- description: Video layer, plane 2 (V)
- description: Graphics layer
dma-names:
items:
- const: vid0
- const: vid1
- const: vid2
- const: gfx0
phys:
description: PHYs for the DP data lanes
minItems: 1
maxItems: 2
phy-names:
minItems: 1
items:
- const: dp-phy0
- const: dp-phy1
ports:
$ref: /schemas/graph.yaml#/properties/ports
description: |
Connections to the programmable logic and the DisplayPort PHYs. Each port
shall have a single endpoint.
properties:
port@0:
$ref: /schemas/graph.yaml#/properties/port
description: The live video input from the programmable logic
port@1:
$ref: /schemas/graph.yaml#/properties/port
description: The live graphics input from the programmable logic
port@2:
$ref: /schemas/graph.yaml#/properties/port
description: The live audio input from the programmable logic
port@3:
$ref: /schemas/graph.yaml#/properties/port
description: The blended video output to the programmable logic
port@4:
$ref: /schemas/graph.yaml#/properties/port
description: The mixed audio output to the programmable logic
port@5:
$ref: /schemas/graph.yaml#/properties/port
description: The DisplayPort output
required:
- port@0
- port@1
- port@2
- port@3
- port@4
- port@5
required:
- compatible
- reg
- reg-names
- interrupts
- clocks
- clock-names
- power-domains
- resets
- dmas
- dma-names
- phys
- phy-names
- ports
additionalProperties: false
examples:
- |
#include <dt-bindings/phy/phy.h>
#include <dt-bindings/reset/xlnx-zynqmp-resets.h>
display@fd4a0000 {
compatible = "xlnx,zynqmp-dpsub-1.7";
reg = <0xfd4a0000 0x1000>,
<0xfd4aa000 0x1000>,
<0xfd4ab000 0x1000>,
<0xfd4ac000 0x1000>;
reg-names = "dp", "blend", "av_buf", "aud";
interrupts = <0 119 4>;
interrupt-parent = <&gic>;
clock-names = "dp_apb_clk", "dp_aud_clk", "dp_live_video_in_clk";
clocks = <&dp_aclk>, <&clkc 17>, <&si570_1>;
power-domains = <&pd_dp>;
resets = <&reset ZYNQMP_RESET_DP>;
dma-names = "vid0", "vid1", "vid2", "gfx0";
dmas = <&xlnx_dpdma 0>,
<&xlnx_dpdma 1>,
<&xlnx_dpdma 2>,
<&xlnx_dpdma 3>;
phys = <&psgtr 1 PHY_TYPE_DP 0 3>,
<&psgtr 0 PHY_TYPE_DP 1 3>;
phy-names = "dp-phy0", "dp-phy1";
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
};
port@1 {
reg = <1>;
};
port@2 {
reg = <2>;
};
port@3 {
reg = <3>;
};
port@4 {
reg = <4>;
};
port@5 {
reg = <5>;
dpsub_dp_out: endpoint {
remote-endpoint = <&dp_connector>;
};
};
};
};
...