xref: /linux/Documentation/devicetree/bindings/display/mediatek/mediatek,rdma.yaml (revision 52990390f91c1c39ca742fc8f390b29891d95127) 
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      - enum:
27          - mediatek,mt2701-disp-rdma
28          - mediatek,mt8173-disp-rdma
29          - mediatek,mt8183-disp-rdma
30          - mediatek,mt8195-disp-rdma
31      - items:
32          - enum:
33              - mediatek,mt8188-disp-rdma
34          - const: mediatek,mt8195-disp-rdma
35      - items:
36          - enum:
37              - mediatek,mt7623-disp-rdma
38              - mediatek,mt2712-disp-rdma
39          - const: mediatek,mt2701-disp-rdma
40      - items:
41          - enum:
42              - mediatek,mt8186-disp-rdma
43              - mediatek,mt8192-disp-rdma
44          - const: mediatek,mt8183-disp-rdma
45
46  reg:
47    maxItems: 1
48
49  interrupts:
50    maxItems: 1
51
52  power-domains:
53    description: A phandle and PM domain specifier as defined by bindings of
54      the power controller specified by phandle. See
55      Documentation/devicetree/bindings/power/power-domain.yaml for details.
56
57  clocks:
58    items:
59      - description: RDMA Clock
60
61  iommus:
62    description:
63      This property should point to the respective IOMMU block with master port as argument,
64      see Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.
65
66  mediatek,rdma-fifo-size:
67    description:
68      rdma fifo size may be different even in same SOC, add this property to the
69      corresponding rdma.
70      The value below is the Max value which defined in hardware data sheet
71      mediatek,rdma-fifo-size of mt8173-rdma0 is 8K
72      mediatek,rdma-fifo-size of mt8183-rdma0 is 5K
73      mediatek,rdma-fifo-size of mt8183-rdma1 is 2K
74    $ref: /schemas/types.yaml#/definitions/uint32
75    enum: [8192, 5120, 2048]
76
77  mediatek,gce-client-reg:
78    description: The register of client driver can be configured by gce with
79      4 arguments defined in this property, such as phandle of gce, subsys id,
80      register offset and size. Each GCE subsys id is mapping to a client
81      defined in the header include/dt-bindings/gce/<chip>-gce.h.
82    $ref: /schemas/types.yaml#/definitions/phandle-array
83    maxItems: 1
84
85required:
86  - compatible
87  - reg
88  - interrupts
89  - power-domains
90  - clocks
91  - iommus
92
93additionalProperties: false
94
95examples:
96  - |
97    #include <dt-bindings/interrupt-controller/arm-gic.h>
98    #include <dt-bindings/clock/mt8173-clk.h>
99    #include <dt-bindings/power/mt8173-power.h>
100    #include <dt-bindings/gce/mt8173-gce.h>
101    #include <dt-bindings/memory/mt8173-larb-port.h>
102
103    soc {
104        #address-cells = <2>;
105        #size-cells = <2>;
106
107        rdma0: rdma@1400e000 {
108            compatible = "mediatek,mt8173-disp-rdma";
109            reg = <0 0x1400e000 0 0x1000>;
110            interrupts = <GIC_SPI 182 IRQ_TYPE_LEVEL_LOW>;
111            power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
112            clocks = <&mmsys CLK_MM_DISP_RDMA0>;
113            iommus = <&iommu M4U_PORT_DISP_RDMA0>;
114            mediatek,rdma-fifo-size = <8192>;
115            mediatek,gce-client-reg = <&gce SUBSYS_1400XXXX 0xe000 0x1000>;
116        };
117    };
118