85 lines
1.8 KiB
Plaintext
85 lines
1.8 KiB
Plaintext
Qualcomm APR (Asynchronous Packet Router) binding
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This binding describes the Qualcomm APR. APR is a IPC protocol for
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communication between Application processor and QDSP. APR is mainly
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used for audio/voice services on the QDSP.
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- compatible:
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Usage: required
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Value type: <stringlist>
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Definition: must be "qcom,apr-v<VERSION-NUMBER>", example "qcom,apr-v2"
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- reg
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Usage: required
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Value type: <u32>
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Definition: Destination processor ID.
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Possible values are :
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1 - APR simulator
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2 - PC
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3 - MODEM
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4 - ADSP
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5 - APPS
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6 - MODEM2
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7 - APPS2
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= APR SERVICES
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Each subnode of the APR node represents service tied to this apr. The name
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of the nodes are not important. The properties of these nodes are defined
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by the individual bindings for the specific service
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- All APR services MUST contain the following property:
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- reg
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Usage: required
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Value type: <u32>
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Definition: APR Service ID
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Possible values are :
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3 - DSP Core Service
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4 - Audio Front End Service.
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5 - Voice Stream Manager Service.
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6 - Voice processing manager.
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7 - Audio Stream Manager Service.
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8 - Audio Device Manager Service.
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9 - Multimode voice manager.
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10 - Core voice stream.
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11 - Core voice processor.
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12 - Ultrasound stream manager.
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13 - Listen stream manager.
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= EXAMPLE
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The following example represents a QDSP based sound card on a MSM8996 device
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which uses apr as communication between Apps and QDSP.
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apr@4 {
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compatible = "qcom,apr-v2";
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reg = <APR_DOMAIN_ADSP>;
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q6core@3 {
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compatible = "qcom,q6core";
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reg = <APR_SVC_ADSP_CORE>;
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};
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q6afe@4 {
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compatible = "qcom,q6afe";
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reg = <APR_SVC_AFE>;
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dais {
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#sound-dai-cells = <1>;
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hdmi@1 {
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reg = <1>;
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};
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};
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};
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q6asm@7 {
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compatible = "qcom,q6asm";
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reg = <APR_SVC_ASM>;
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...
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};
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q6adm@8 {
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compatible = "qcom,q6adm";
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reg = <APR_SVC_ADM>;
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...
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};
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};
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