tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1Qualcomm Audio Stream Manager (Q6ASM) binding
2
3Q6ASM is one of the APR audio service on Q6DSP.
4Please refer to qcom,apr.txt for details of the common apr service bindings
5used by the apr service device.
6
7- but must contain the following property:
8
9- compatible:
10 Usage: required
11 Value type: <stringlist>
12 Definition: must be "qcom,q6asm-v<MAJOR-NUMBER>.<MINOR-NUMBER>".
13 Or "qcom,q6asm" where the version number can be queried
14 from DSP.
15 example "qcom,q6asm-v2.0"
16
17= ASM DAIs (Digital Audio Interface)
18"dais" subnode of the ASM node represents dai specific configuration
19
20- compatible:
21 Usage: required
22 Value type: <stringlist>
23 Definition: must be "qcom,q6asm-dais".
24
25- #sound-dai-cells
26 Usage: required
27 Value type: <u32>
28 Definition: Must be 1
29
30== ASM DAI is subnode of "dais" and represent a dai, it includes board specific
31configuration of each dai. Must contain the following properties.
32
33- reg
34 Usage: required
35 Value type: <u32>
36 Definition: Must be dai id
37
38- direction:
39 Usage: Required for Compress offload dais
40 Value type: <u32>
41 Definition: Specifies the direction of the dai stream
42 Q6ASM_DAI_TX_RX (0) for both tx and rx
43 Q6ASM_DAI_TX (1) for only tx (Capture/Encode)
44 Q6ASM_DAI_RX (2) for only rx (Playback/Decode)
45
46- is-compress-dai:
47 Usage: Required for Compress offload dais
48 Value type: <boolean>
49 Definition: present for Compress offload dais
50
51
52= EXAMPLE
53#include <dt-bindings/sound/qcom,q6asm.h>
54
55apr-service@7 {
56 compatible = "qcom,q6asm";
57 reg = <APR_SVC_ASM>;
58 q6asmdai: dais {
59 compatible = "qcom,q6asm-dais";
60 #address-cells = <1>;
61 #size-cells = <0>;
62 #sound-dai-cells = <1>;
63
64 dai@0 {
65 reg = <0>;
66 direction = <Q6ASM_DAI_RX>;
67 is-compress-dai;
68 };
69 };
70};