xref: /freebsd/sys/contrib/device-tree/Bindings/display/mediatek/mediatek,merge.yaml (revision b1fd95c9e24791d44593e611406b41e57826a5b8) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/display/mediatek/mediatek,merge.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Mediatek display merge
8
9maintainers:
10  - Chun-Kuang Hu <chunkuang.hu@kernel.org>
11  - Philipp Zabel <p.zabel@pengutronix.de>
12
13description: |
14  Mediatek display merge, namely MERGE, is used to merge two slice-per-line
15  inputs into one side-by-side output.
16  MERGE device node must be siblings to the central MMSYS_CONFIG node.
17  For a description of the MMSYS_CONFIG binding, see
18  Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
19  for details.
20
21properties:
22  compatible:
23    oneOf:
24      - enum:
25          - mediatek,mt8173-disp-merge
26          - mediatek,mt8195-disp-merge
27      - items:
28          - const: mediatek,mt6795-disp-merge
29          - const: mediatek,mt8173-disp-merge
30
31  reg:
32    maxItems: 1
33
34  interrupts:
35    maxItems: 1
36
37  power-domains:
38    description: A phandle and PM domain specifier as defined by bindings of
39      the power controller specified by phandle. See
40      Documentation/devicetree/bindings/power/power-domain.yaml for details.
41
42  clocks:
43    minItems: 1
44    maxItems: 2
45
46  clock-names:
47    oneOf:
48      - items:
49          - const: merge
50      - items:
51          - const: merge
52          - const: merge_async
53
54  mediatek,merge-fifo-en:
55    description:
56      The setting of merge fifo is mainly provided for the display latency
57      buffer to ensure that the back-end panel display data will not be
58      underrun, a little more data is needed in the fifo.
59      According to the merge fifo settings, when the water level is detected
60      to be insufficient, it will trigger RDMA sending ultra and preulra
61      command to SMI to speed up the data rate.
62    type: boolean
63
64  mediatek,merge-mute:
65    description: Support mute function. Mute the content of merge output.
66    type: boolean
67
68  mediatek,gce-client-reg:
69    description: The register of client driver can be configured by gce with
70      4 arguments defined in this property, such as phandle of gce, subsys id,
71      register offset and size. Each GCE subsys id is mapping to a client
72      defined in the header include/dt-bindings/gce/<chip>-gce.h.
73    $ref: /schemas/types.yaml#/definitions/phandle-array
74    maxItems: 1
75
76  resets:
77    description: reset controller
78      See Documentation/devicetree/bindings/reset/reset.txt for details.
79    maxItems: 1
80
81required:
82  - compatible
83  - reg
84  - power-domains
85  - clocks
86
87additionalProperties: false
88
89examples:
90  - |
91    #include <dt-bindings/interrupt-controller/arm-gic.h>
92    #include <dt-bindings/clock/mt8173-clk.h>
93    #include <dt-bindings/power/mt8173-power.h>
94
95    soc {
96        #address-cells = <2>;
97        #size-cells = <2>;
98
99        merge@14017000 {
100            compatible = "mediatek,mt8173-disp-merge";
101            reg = <0 0x14017000 0 0x1000>;
102            power-domains = <&spm MT8173_POWER_DOMAIN_MM>;
103            clocks = <&mmsys CLK_MM_DISP_MERGE>;
104            clock-names = "merge";
105        };
106    };
107