xref: /linux/Documentation/devicetree/bindings/display/mediatek/mediatek,rdma.yaml (revision dec1c62e91ba268ab2a6e339d4d7a59287d5eba1) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/display/mediatek/mediatek,rdma.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Mediatek Read Direct Memory Access
8
9maintainers:
10  - Chun-Kuang Hu <chunkuang.hu@kernel.org>
11  - Philipp Zabel <p.zabel@pengutronix.de>
12
13description: |
14  Mediatek Read Direct Memory Access(RDMA) component used to read the
15  data into DMA. It provides real time data to the back-end panel
16  driver, such as DSI, DPI and DP_INTF.
17  It contains one line buffer to store the sufficient pixel data.
18  RDMA device node must be siblings to the central MMSYS_CONFIG node.
19  For a description of the MMSYS_CONFIG binding, see
20  Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
21  for details.
22
23properties:
24  compatible:
25    oneOf:
26      - items:
27          - const: mediatek,mt2701-disp-rdma
28      - items:
29          - const: mediatek,mt8173-disp-rdma
30      - items:
31          - const: mediatek,mt8183-disp-rdma
32      - items:
33          - const: mediatek,mt8195-disp-rdma
34      - items:
35          - enum:
36              - mediatek,mt7623-disp-rdma
37              - mediatek,mt2712-disp-rdma
38          - const: mediatek,mt2701-disp-rdma
39      - items:
40          - enum:
41              - mediatek,mt8186-disp-rdma
42              - mediatek,mt8192-disp-rdma
43          - const: mediatek,mt8183-disp-rdma
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: RDMA Clock
59
60  iommus:
61    description:
62      This property should point to the respective IOMMU block with master port as argument,
63      see Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.
64
65  mediatek,rdma-fifo-size:
66    description:
67      rdma fifo size may be different even in same SOC, add this property to the
68      corresponding rdma.
69      The value below is the Max value which defined in hardware data sheet
70      mediatek,rdma-fifo-size of mt8173-rdma0 is 8K
71      mediatek,rdma-fifo-size of mt8183-rdma0 is 5K
72      mediatek,rdma-fifo-size of mt8183-rdma1 is 2K
73    $ref: /schemas/types.yaml#/definitions/uint32
74    enum: [8192, 5120, 2048]
75
76  mediatek,gce-client-reg:
77    description: The register of client driver can be configured by gce with
78      4 arguments defined in this property, such as phandle of gce, subsys id,
79      register offset and size. Each GCE subsys id is mapping to a client
80      defined in the header include/dt-bindings/gce/<chip>-gce.h.
81    $ref: /schemas/types.yaml#/definitions/phandle-array
82    maxItems: 1
83
84required:
85  - compatible
86  - reg
87  - interrupts
88  - power-domains
89  - clocks
90  - iommus
91
92additionalProperties: false
93
94examples:
95  - |
96    #include <dt-bindings/interrupt-controller/arm-gic.h>
97    #include <dt-bindings/clock/mt8173-clk.h>
98    #include <dt-bindings/power/mt8173-power.h>
99    #include <dt-bindings/gce/mt8173-gce.h>
100    #include <dt-bindings/memory/mt8173-larb-port.h>
101
102    soc {
103        #address-cells = <2>;
104        #size-cells = <2>;
105
106        rdma0: rdma@1400e000 {
107            compatible = "mediatek,mt8173-disp-rdma";
108            reg = <0 0x1400e000 0 0x1000>;
109            interrupts = <GIC_SPI 182 IRQ_TYPE_LEVEL_LOW>;
110            power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
111            clocks = <&mmsys CLK_MM_DISP_RDMA0>;
112            iommus = <&iommu M4U_PORT_DISP_RDMA0>;
113            mediatek,rdma-fifo-size = <8192>;
114            mediatek,gce-client-reg = <&gce SUBSYS_1400XXXX 0xe000 0x1000>;
115        };
116    };
117