xref: /linux/Documentation/devicetree/bindings/interconnect/mediatek,mt8183-emi.yaml (revision 527a0f2bdcfe77fce22f006b97e42e4da3137c86) 
1# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/interconnect/mediatek,mt8183-emi.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: MediaTek External Memory Interface (EMI) Interconnect
8
9maintainers:
10  - AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
11
12description: |
13  EMI interconnect providers support system bandwidth requirements through
14  Dynamic Voltage Frequency Scaling Resource Collector (DVFSRC) hardware.
15  The provider is able to communicate with the DVFSRC through Secure Monitor
16  Call (SMC).
17
18             ICC provider         ICC Nodes
19                              ----          ----
20             _________       |CPU |   |--- |VPU |
21    _____   |         |-----  ----    |     ----
22   |     |->|  DRAM   |       ----    |     ----
23   |DRAM |->|scheduler|----- |GPU |   |--- |DISP|
24   |     |->|  (EMI)  |       ----    |     ----
25   |_____|->|_________|---.   -----   |     ----
26               /|\         `-|MMSYS|--|--- |VDEC|
27                |             -----   |     ----
28                |                     |     ----
29                | change DRAM freq    |--- |VENC|
30             --------                 |     ----
31    SMC --> | DVFSRC |                |     ----
32             --------                 |--- |IMG |
33                                      |     ----
34                                      |     ----
35                                      |--- |CAM |
36                                            ----
37
38properties:
39  compatible:
40    enum:
41      - mediatek,mt8183-emi
42      - mediatek,mt8195-emi
43
44  '#interconnect-cells':
45    const: 1
46
47required:
48  - compatible
49  - '#interconnect-cells'
50
51unevaluatedProperties: false
52