1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 # Copyright 2019 BayLibre, SAS
3 %YAML 1.2
4 ---
5 $id: http://devicetree.org/schemas/display/amlogic,meson-dw-hdmi.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
7
8 title: Amlogic specific extensions to the Synopsys Designware HDMI Controller
9
10 maintainers:
11 - Neil Armstrong <neil.armstrong@linaro.org>
12
13 allOf:
14 - $ref: /schemas/sound/dai-common.yaml#
15
16 description: |
17 The Amlogic Meson Synopsys Designware Integration is composed of
18 - A Synopsys DesignWare HDMI Controller IP
19 - A TOP control block controlling the Clocks and PHY
20 - A custom HDMI PHY in order to convert video to TMDS signal
21 ___________________________________
22 | HDMI TOP |<= HPD
23 |___________________________________|
24 | | |
25 | Synopsys HDMI | HDMI PHY |=> TMDS
26 | Controller |________________|
27 |___________________________________|<=> DDC
28
29 The HDMI TOP block only supports HPD sensing.
30 The Synopsys HDMI Controller interrupt is routed through the
31 TOP Block interrupt.
32 Communication to the TOP Block and the Synopsys HDMI Controller is done
33 via a pair of dedicated addr+read/write registers.
34 The HDMI PHY is configured by registers in the HHI register block.
35
36 Pixel data arrives in "4:4:4" format from the VENC block and the VPU HDMI mux
37 selects either the ENCI encoder for the 576i or 480i formats or the ENCP
38 encoder for all the other formats including interlaced HD formats.
39
40 The VENC uses a DVI encoder on top of the ENCI or ENCP encoders to generate
41 DVI timings for the HDMI controller.
42
43 Amlogic Meson GXBB, GXL and GXM SoCs families embeds the Synopsys DesignWare
44 HDMI TX IP version 2.01a with HDCP and I2C & S/PDIF
45 audio source interfaces.
46
47 properties:
48 compatible:
49 oneOf:
50 - items:
51 - enum:
52 - amlogic,meson-gxbb-dw-hdmi # GXBB (S905)
53 - amlogic,meson-gxl-dw-hdmi # GXL (S905X, S905D)
54 - amlogic,meson-gxm-dw-hdmi # GXM (S912)
55 - const: amlogic,meson-gx-dw-hdmi
56 - enum:
57 - amlogic,meson-g12a-dw-hdmi # G12A (S905X2, S905Y2, S905D2)
58
59 reg:
60 maxItems: 1
61
62 interrupts:
63 maxItems: 1
64
65 clocks:
66 minItems: 3
67
68 clock-names:
69 items:
70 - const: isfr
71 - const: iahb
72 - const: venci
73
74 power-domains:
75 maxItems: 1
76 description: phandle to the associated power domain
77
78 resets:
79 minItems: 3
80
81 reset-names:
82 items:
83 - const: hdmitx_apb
84 - const: hdmitx
85 - const: hdmitx_phy
86
87 hdmi-supply:
88 description: phandle to an external 5V regulator to power the HDMI logic
89
90 port@0:
91 $ref: /schemas/graph.yaml#/properties/port
92 description:
93 A port node pointing to the VENC Input port node.
94
95 port@1:
96 $ref: /schemas/graph.yaml#/properties/port
97 description:
98 A port node pointing to the TMDS Output port node.
99
100 "#address-cells":
101 const: 1
102
103 "#size-cells":
104 const: 0
105
106 "#sound-dai-cells":
107 const: 0
108
109 sound-name-prefix: true
110
111 required:
112 - compatible
113 - reg
114 - interrupts
115 - clocks
116 - clock-names
117 - resets
118 - reset-names
119 - port@0
120 - port@1
121 - "#address-cells"
122 - "#size-cells"
123
124 additionalProperties: false
125
126 examples:
127 - |
128 hdmi_tx: hdmi-tx@c883a000 {
129 compatible = "amlogic,meson-gxbb-dw-hdmi", "amlogic,meson-gx-dw-hdmi";
130 reg = <0xc883a000 0x1c>;
131 interrupts = <57>;
132 resets = <&reset_apb>, <&reset_hdmitx>, <&reset_hdmitx_phy>;
133 reset-names = "hdmitx_apb", "hdmitx", "hdmitx_phy";
134 clocks = <&clk_isfr>, <&clk_iahb>, <&clk_venci>;
135 clock-names = "isfr", "iahb", "venci";
136 power-domains = <&pd_vpu>;
137 #address-cells = <1>;
138 #size-cells = <0>;
139
140 /* VPU VENC Input */
141 hdmi_tx_venc_port: port@0 {
142 reg = <0>;
143
144 hdmi_tx_in: endpoint {
145 remote-endpoint = <&hdmi_tx_out>;
146 };
147 };
148
149 /* TMDS Output */
150 hdmi_tx_tmds_port: port@1 {
151 reg = <1>;
152
153 hdmi_tx_tmds_out: endpoint {
154 remote-endpoint = <&hdmi_connector_in>;
155 };
156 };
157 };
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