mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
139 lines
4.1 KiB
139 lines
4.1 KiB
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
|
# Copyright 2019 BayLibre, SAS |
|
%YAML 1.2 |
|
--- |
|
$id: "http://devicetree.org/schemas/display/amlogic,meson-vpu.yaml#" |
|
$schema: "http://devicetree.org/meta-schemas/core.yaml#" |
|
|
|
title: Amlogic Meson Display Controller |
|
|
|
maintainers: |
|
- Neil Armstrong <[email protected]> |
|
|
|
description: | |
|
The Amlogic Meson Display controller is composed of several components |
|
that are going to be documented below |
|
|
|
DMC|---------------VPU (Video Processing Unit)----------------|------HHI------| |
|
| vd1 _______ _____________ _________________ | | |
|
D |-------| |----| | | | | HDMI PLL | |
|
D | vd2 | VIU | | Video Post | | Video Encoders |<---|-----VCLK | |
|
R |-------| |----| Processing | | | | | |
|
| osd2 | | | |---| Enci ----------|----|-----VDAC------| |
|
R |-------| CSC |----| Scalers | | Encp ----------|----|----HDMI-TX----| |
|
A | osd1 | | | Blenders | | Encl ----------|----|---------------| |
|
M |-------|______|----|____________| |________________| | | |
|
___|__________________________________________________________|_______________| |
|
|
|
|
|
VIU: Video Input Unit |
|
--------------------- |
|
|
|
The Video Input Unit is in charge of the pixel scanout from the DDR memory. |
|
It fetches the frames addresses, stride and parameters from the "Canvas" memory. |
|
This part is also in charge of the CSC (Colorspace Conversion). |
|
It can handle 2 OSD Planes and 2 Video Planes. |
|
|
|
VPP: Video Post Processing |
|
-------------------------- |
|
|
|
The Video Post Processing is in charge of the scaling and blending of the |
|
various planes into a single pixel stream. |
|
There is a special "pre-blending" used by the video planes with a dedicated |
|
scaler and a "post-blending" to merge with the OSD Planes. |
|
The OSD planes also have a dedicated scaler for one of the OSD. |
|
|
|
VENC: Video Encoders |
|
-------------------- |
|
|
|
The VENC is composed of the multiple pixel encoders |
|
- ENCI : Interlace Video encoder for CVBS and Interlace HDMI |
|
- ENCP : Progressive Video Encoder for HDMI |
|
- ENCL : LCD LVDS Encoder |
|
The VENC Unit gets a Pixel Clocks (VCLK) from a dedicated HDMI PLL and clock |
|
tree and provides the scanout clock to the VPP and VIU. |
|
The ENCI is connected to a single VDAC for Composite Output. |
|
The ENCI and ENCP are connected to an on-chip HDMI Transceiver. |
|
|
|
properties: |
|
compatible: |
|
oneOf: |
|
- items: |
|
- enum: |
|
- amlogic,meson-gxbb-vpu # GXBB (S905) |
|
- amlogic,meson-gxl-vpu # GXL (S905X, S905D) |
|
- amlogic,meson-gxm-vpu # GXM (S912) |
|
- const: amlogic,meson-gx-vpu |
|
- enum: |
|
- amlogic,meson-g12a-vpu # G12A (S905X2, S905Y2, S905D2) |
|
|
|
reg: |
|
maxItems: 2 |
|
|
|
reg-names: |
|
items: |
|
- const: vpu |
|
- const: hhi |
|
|
|
interrupts: |
|
maxItems: 1 |
|
|
|
power-domains: |
|
maxItems: 1 |
|
description: phandle to the associated power domain |
|
|
|
port@0: |
|
$ref: /schemas/graph.yaml#/properties/port |
|
description: |
|
A port node pointing to the CVBS VDAC port node. |
|
|
|
port@1: |
|
$ref: /schemas/graph.yaml#/properties/port |
|
description: |
|
A port node pointing to the HDMI-TX port node. |
|
|
|
"#address-cells": |
|
const: 1 |
|
|
|
"#size-cells": |
|
const: 0 |
|
|
|
required: |
|
- compatible |
|
- reg |
|
- interrupts |
|
- port@0 |
|
- port@1 |
|
- "#address-cells" |
|
- "#size-cells" |
|
|
|
additionalProperties: false |
|
|
|
examples: |
|
- | |
|
vpu: vpu@d0100000 { |
|
compatible = "amlogic,meson-gxbb-vpu", "amlogic,meson-gx-vpu"; |
|
reg = <0xd0100000 0x100000>, <0xc883c000 0x1000>; |
|
reg-names = "vpu", "hhi"; |
|
interrupts = <3>; |
|
#address-cells = <1>; |
|
#size-cells = <0>; |
|
|
|
/* CVBS VDAC output port */ |
|
port@0 { |
|
reg = <0>; |
|
|
|
cvbs_vdac_out: endpoint { |
|
remote-endpoint = <&tv_connector_in>; |
|
}; |
|
}; |
|
|
|
/* HDMI TX output port */ |
|
port@1 { |
|
reg = <1>; |
|
|
|
hdmi_tx_out: endpoint { |
|
remote-endpoint = <&hdmi_tx_in>; |
|
}; |
|
}; |
|
};
|
|
|