1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/display/arm,malidp.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Arm Mali Display Processor (Mali-DP)
8
9 maintainers:
10 - Liviu Dudau <Liviu.Dudau@arm.com>
11 - Andre Przywara <andre.przywara@arm.com>
12
13 description:
14 The following bindings apply to a family of Display Processors sold as
15 licensable IP by ARM Ltd. The bindings describe the Mali DP500, DP550 and
16 DP650 processors that offer multiple composition layers, support for
17 rotation and scaling output.
18
19 properties:
20 compatible:
21 enum:
22 - arm,mali-dp500
23 - arm,mali-dp550
24 - arm,mali-dp650
25
26 reg:
27 maxItems: 1
28
29 interrupts:
30 items:
31 - description:
32 The interrupt used by the Display Engine (DE). Can be shared with
33 the interrupt for the Scaling Engine (SE), but it will have to be
34 listed individually.
35 - description:
36 The interrupt used by the Scaling Engine (SE). Can be shared with
37 the interrupt for the Display Engine (DE), but it will have to be
38 listed individually.
39
40 interrupt-names:
41 items:
42 - const: DE
43 - const: SE
44
45 clock-names:
46 items:
47 - const: pxlclk
48 - const: mclk
49 - const: aclk
50 - const: pclk
51
52 clocks:
53 items:
54 - description: the pixel clock feeding the output PLL of the processor
55 - description: the main processor clock
56 - description: the AXI interface clock
57 - description: the APB interface clock
58
59 memory-region:
60 maxItems: 1
61 description:
62 Phandle to a node describing memory to be used for the framebuffer.
63 If not present, the framebuffer may be located anywhere in memory.
64
65 arm,malidp-output-port-lines:
66 $ref: /schemas/types.yaml#/definitions/uint8-array
67 description:
68 Number of output lines/bits for each colour channel.
69 items:
70 - description: number of output lines for the red channel (R)
71 - description: number of output lines for the green channel (G)
72 - description: number of output lines for the blue channel (B)
73
74 arm,malidp-arqos-value:
75 $ref: /schemas/types.yaml#/definitions/uint32
76 description:
77 Quality-of-Service value for the display engine FIFOs, to write
78 into the RQOS register of the DP500.
79 See the ARM Mali-DP500 TRM for details on the encoding.
80 If omitted, the RQOS register will not be changed.
81
82 port:
83 $ref: /schemas/graph.yaml#/properties/port
84 unevaluatedProperties: false
85 description:
86 Output endpoint of the controller, connecting the LCD panel signals.
87
88 additionalProperties: false
89
90 required:
91 - compatible
92 - reg
93 - interrupts
94 - interrupt-names
95 - clocks
96 - clock-names
97 - port
98 - arm,malidp-output-port-lines
99
100 examples:
101 - |
102 dp0: malidp@6f200000 {
103 compatible = "arm,mali-dp650";
104 reg = <0x6f200000 0x20000>;
105 memory-region = <&display_reserved>;
106 interrupts = <168>, <168>;
107 interrupt-names = "DE", "SE";
108 clocks = <&oscclk2>, <&fpgaosc0>, <&fpgaosc1>, <&fpgaosc1>;
109 clock-names = "pxlclk", "mclk", "aclk", "pclk";
110 arm,malidp-output-port-lines = /bits/ 8 <8 8 8>;
111 arm,malidp-arqos-value = <0xd000d000>;
112
113 port {
114 dp0_output: endpoint {
115 remote-endpoint = <&tda998x_2_input>;
116 };
117 };
118 };
119 ...
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