Amlogic AXG sound card:
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Required properties:
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- compatible: "amlogic,axg-sound-card"
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- model : User specified audio sound card name, one string
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Optional properties:
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- audio-aux-devs : List of phandles pointing to auxiliary devices
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- audio-widgets : Please refer to widgets.txt.
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- audio-routing : A list of the connections between audio components.
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Subnodes:
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- dai-link: Container for dai-link level properties and the CODEC
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sub-nodes. There should be at least one (and probably more)
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subnode of this type.
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Required dai-link properties:
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- sound-dai: phandle and port of the CPU DAI.
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Required TDM Backend dai-link properties:
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- dai-format : CPU/CODEC common audio format
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Optional TDM Backend dai-link properties:
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- dai-tdm-slot-rx-mask-{0,1,2,3}: Receive direction slot masks
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- dai-tdm-slot-tx-mask-{0,1,2,3}: Transmit direction slot masks
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When omitted, mask is assumed to have to no
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slots. A valid must have at one slot, so at
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least one these mask should be provided with
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an enabled slot.
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- dai-tdm-slot-num : Please refer to tdm-slot.txt.
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If omitted, slot number is set to accommodate the largest
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mask provided.
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- dai-tdm-slot-width : Please refer to tdm-slot.txt. default to 32 if omitted.
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- mclk-fs : Multiplication factor between stream rate and mclk
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Backend dai-link subnodes:
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- codec: dai-link representing backend links should have at least one subnode.
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One subnode for each codec of the dai-link.
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dai-link representing frontend links have no codec, therefore have no
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subnodes
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Required codec subnodes properties:
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- sound-dai: phandle and port of the CODEC DAI.
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Optional codec subnodes properties:
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- dai-tdm-slot-tx-mask : Please refer to tdm-slot.txt.
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- dai-tdm-slot-rx-mask : Please refer to tdm-slot.txt.
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Example:
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sound {
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compatible = "amlogic,axg-sound-card";
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model = "AXG-S420";
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audio-aux-devs = <&tdmin_a>, <&tdmout_c>;
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audio-widgets = "Line", "Lineout",
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"Line", "Linein",
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"Speaker", "Speaker1 Left",
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"Speaker", "Speaker1 Right";
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"Speaker", "Speaker2 Left",
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"Speaker", "Speaker2 Right";
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audio-routing = "TDMOUT_C IN 0", "FRDDR_A OUT 2",
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"SPDIFOUT IN 0", "FRDDR_A OUT 3",
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"TDM_C Playback", "TDMOUT_C OUT",
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"TDMIN_A IN 2", "TDM_C Capture",
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"TDMIN_A IN 5", "TDM_C Loopback",
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"TODDR_A IN 0", "TDMIN_A OUT",
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"Lineout", "Lineout AOUTL",
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"Lineout", "Lineout AOUTR",
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"Speaker1 Left", "SPK1 OUT_A",
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"Speaker2 Left", "SPK2 OUT_A",
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"Speaker1 Right", "SPK1 OUT_B",
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"Speaker2 Right", "SPK2 OUT_B",
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"Linein AINL", "Linein",
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"Linein AINR", "Linein";
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dai-link@0 {
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sound-dai = <&frddr_a>;
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};
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dai-link@1 {
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sound-dai = <&toddr_a>;
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};
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dai-link@2 {
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sound-dai = <&tdmif_c>;
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dai-format = "i2s";
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dai-tdm-slot-tx-mask-2 = <1 1>;
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dai-tdm-slot-tx-mask-3 = <1 1>;
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dai-tdm-slot-rx-mask-1 = <1 1>;
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mclk-fs = <256>;
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codec@0 {
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sound-dai = <&lineout>;
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};
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codec@1 {
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sound-dai = <&speaker_amp1>;
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};
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codec@2 {
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sound-dai = <&speaker_amp2>;
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};
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codec@3 {
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sound-dai = <&linein>;
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};
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};
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dai-link@3 {
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sound-dai = <&spdifout>;
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codec {
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sound-dai = <&spdif_dit>;
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};
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};
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};
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