Commit | Line | Data |
---|---|---|
2d4e31de KM |
1 | Audio Graph Card: |
2 | ||
3 | Audio Graph Card specifies audio DAI connections of SoC <-> codec. | |
4 | It is based on common bindings for device graphs. | |
5 | see ${LINUX}/Documentation/devicetree/bindings/graph.txt | |
6 | ||
7 | Basically, Audio Graph Card property is same as Simple Card. | |
8 | see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt | |
9 | ||
10 | Below are same as Simple-Card. | |
11 | ||
12 | - label | |
a0c683d7 SG |
13 | - widgets |
14 | - routing | |
2d4e31de KM |
15 | - dai-format |
16 | - frame-master | |
17 | - bitclock-master | |
18 | - bitclock-inversion | |
19 | - frame-inversion | |
20 | - dai-tdm-slot-num | |
21 | - dai-tdm-slot-width | |
22 | - clocks / system-clock-frequency | |
23 | ||
24 | Required properties: | |
25 | ||
26 | - compatible : "audio-graph-card"; | |
27 | - dais : list of CPU DAI port{s} | |
28 | ||
a0c683d7 SG |
29 | Optional properties: |
30 | - pa-gpios: GPIO used to control external amplifier. | |
31 | ||
2d4e31de KM |
32 | Example: Single DAI case |
33 | ||
34 | sound_card { | |
35 | compatible = "audio-graph-card"; | |
36 | ||
37 | dais = <&cpu_port>; | |
38 | }; | |
39 | ||
40 | dai-controller { | |
41 | ... | |
42 | cpu_port: port { | |
43 | cpu_endpoint: endpoint { | |
44 | remote-endpoint = <&codec_endpoint>; | |
45 | ||
46 | dai-format = "left_j"; | |
47 | ... | |
48 | }; | |
49 | }; | |
50 | }; | |
51 | ||
52 | audio-codec { | |
53 | ... | |
54 | port { | |
55 | codec_endpoint: endpoint { | |
56 | remote-endpoint = <&cpu_endpoint>; | |
57 | }; | |
58 | }; | |
59 | }; | |
60 | ||
61 | Example: Multi DAI case | |
62 | ||
63 | sound-card { | |
64 | compatible = "audio-graph-card"; | |
65 | ||
66 | label = "sound-card"; | |
67 | ||
68 | dais = <&cpu_port0 | |
69 | &cpu_port1 | |
70 | &cpu_port2>; | |
71 | }; | |
72 | ||
73 | audio-codec@0 { | |
74 | ... | |
75 | port { | |
76 | codec0_endpoint: endpoint { | |
77 | remote-endpoint = <&cpu_endpoint0>; | |
78 | }; | |
79 | }; | |
80 | }; | |
81 | ||
82 | audio-codec@1 { | |
83 | ... | |
84 | port { | |
85 | codec1_endpoint: endpoint { | |
86 | remote-endpoint = <&cpu_endpoint1>; | |
87 | }; | |
88 | }; | |
89 | }; | |
90 | ||
91 | audio-codec@2 { | |
92 | ... | |
93 | port { | |
94 | codec2_endpoint: endpoint { | |
95 | remote-endpoint = <&cpu_endpoint2>; | |
96 | }; | |
97 | }; | |
98 | }; | |
99 | ||
100 | dai-controller { | |
101 | ... | |
102 | ports { | |
103 | cpu_port0: port@0 { | |
104 | cpu_endpoint0: endpoint { | |
105 | remote-endpoint = <&codec0_endpoint>; | |
106 | ||
107 | dai-format = "left_j"; | |
108 | ... | |
109 | }; | |
110 | }; | |
111 | cpu_port1: port@1 { | |
112 | cpu_endpoint1: endpoint { | |
113 | remote-endpoint = <&codec1_endpoint>; | |
114 | ||
115 | dai-format = "i2s"; | |
116 | ... | |
117 | }; | |
118 | }; | |
119 | cpu_port2: port@2 { | |
120 | cpu_endpoint2: endpoint { | |
121 | remote-endpoint = <&codec2_endpoint>; | |
122 | ||
123 | dai-format = "i2s"; | |
124 | ... | |
125 | }; | |
126 | }; | |
127 | }; | |
128 | }; | |
129 |