tjh.dev
Linux kernel mirror (for testing)
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linux
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/display/mediatek/mediatek,gamma.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Mediatek display gamma correction
8
9maintainers:
10 - Chun-Kuang Hu <chunkuang.hu@kernel.org>
11 - Philipp Zabel <p.zabel@pengutronix.de>
12
13description: |
14 Mediatek display gamma correction, namely GAMMA, provides a nonlinear
15 operation used to adjust luminance in display system.
16 GAMMA 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-gamma
26 - mediatek,mt8183-disp-gamma
27 - mediatek,mt8195-disp-gamma
28 - items:
29 - enum:
30 - mediatek,mt6795-disp-gamma
31 - const: mediatek,mt8173-disp-gamma
32 - items:
33 - enum:
34 - mediatek,mt8186-disp-gamma
35 - mediatek,mt8188-disp-gamma
36 - mediatek,mt8192-disp-gamma
37 - mediatek,mt8195-disp-gamma
38 - mediatek,mt8365-disp-gamma
39 - const: mediatek,mt8183-disp-gamma
40 - items:
41 - enum:
42 - mediatek,mt8188-disp-gamma
43 - const: mediatek,mt8195-disp-gamma
44
45 reg:
46 maxItems: 1
47
48 interrupts:
49 maxItems: 1
50
51 power-domains:
52 description: A phandle and PM domain specifier as defined by bindings of
53 the power controller specified by phandle. See
54 Documentation/devicetree/bindings/power/power-domain.yaml for details.
55
56 clocks:
57 items:
58 - description: GAMMA Clock
59
60 mediatek,gce-client-reg:
61 description: The register of client driver can be configured by gce with
62 4 arguments defined in this property, such as phandle of gce, subsys id,
63 register offset and size. Each GCE subsys id is mapping to a client
64 defined in the header include/dt-bindings/gce/<chip>-gce.h.
65 $ref: /schemas/types.yaml#/definitions/phandle-array
66 maxItems: 1
67
68 ports:
69 $ref: /schemas/graph.yaml#/properties/ports
70
71 properties:
72 port@0:
73 $ref: /schemas/graph.yaml#/properties/port
74 description: GAMMA input, usually from one of the AAL blocks.
75
76 port@1:
77 $ref: /schemas/graph.yaml#/properties/port
78 description:
79 GAMMA output to the input of the next desired component in the
80 display pipeline, for example one of the available DITHER or
81 POSTMASK blocks.
82
83 required:
84 - port@0
85 - port@1
86
87required:
88 - compatible
89 - reg
90 - interrupts
91 - power-domains
92 - clocks
93
94additionalProperties: false
95
96examples:
97 - |
98 #include <dt-bindings/interrupt-controller/arm-gic.h>
99 #include <dt-bindings/clock/mt8173-clk.h>
100 #include <dt-bindings/power/mt8173-power.h>
101 #include <dt-bindings/gce/mt8173-gce.h>
102
103 soc {
104 #address-cells = <2>;
105 #size-cells = <2>;
106
107 gamma@14016000 {
108 compatible = "mediatek,mt8173-disp-gamma";
109 reg = <0 0x14016000 0 0x1000>;
110 interrupts = <GIC_SPI 190 IRQ_TYPE_LEVEL_LOW>;
111 power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
112 clocks = <&mmsys CLK_MM_DISP_GAMMA>;
113 mediatek,gce-client-reg = <&gce SUBSYS_1401XXXX 0x6000 0x1000>;
114 };
115 };