qcom,q6asm.txt

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    1 Qualcomm Audio Stream Manager (Q6ASM) binding
    2 
    3 Q6ASM is one of the APR audio service on Q6DSP.
    4 Please refer to qcom,apr.txt for details of the common apr service bindings
    5 used 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
   31 configuration 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 
   55 apr-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 };

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sys/contrib/device-tree/Bindings/sound/qcom,q6asm.txt