我使用的是 ti-processor-sdk-linux-am57xx-evm-06.03.00.106-Linux-x86-Install.bin
使用 am57xx-beagle-x15-common.dtsi 设备树
这个是关于audio的设备数配置
....................................................................................
sound0: sound0 {
compatible = "simple-audio-card";
simple-audio-card,name = "BeagleBoard-X15";
simple-audio-card,widgets =
"Line", "Line Out",
"Line", "Line In";
simple-audio-card,routing =
"Line Out", "LLOUT",
"Line Out", "RLOUT",
"MIC2L", "Line In",
"MIC2R", "Line In";
simple-audio-card,format = "dsp_b";
simple-audio-card,bitclock-master = <&sound0_master>;
simple-audio-card,frame-master = <&sound0_master>;
simple-audio-card,bitclock-inversion;
simple-audio-card,cpu {
sound-dai = <&mcasp3>;
};
sound0_master: simple-audio-card,codec {
sound-dai = <&tlv320aic3104>;
clocks = <&clkout2_clk>;
};
};
tlv320aic3104: tlv320aic3104@18 {
#sound-dai-cells = <0>;
compatible = "ti,tlv320aic3104";
reg = <0x18>;
assigned-clocks = <&clkoutmux2_clk_mux>;
assigned-clock-parents = <&sys_clk2_dclk_div>;
status = "okay";
adc-settle-ms = <40>;
AVDD-supply = <&vdd_3v3>;
IOVDD-supply = <&vdd_3v3>;
DRVDD-supply = <&vdd_3v3>;
DVDD-supply = <&aic_dvdd>;
};
&mcasp3 {
#sound-dai-cells = <0>;
assigned-clocks = <&l4per_clkctrl DRA7_MCASP3_CLKCTRL 22>;
assigned-clock-parents = <&sys_clkin2>;
status = "okay";
op-mode = <0>; /* MCASP_IIS_MODE */
tdm-slots = <2>;
/* 4 serializers */
serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */
1 2 0 0
>;
tx-num-evt = <32>;
rx-num-evt = <32>;
};
.................................................................................................
下面是audio的原理图
现在使用aplay 播放声音是正常的
用arecord -d 5 music.wav 录音，是静音，没有任何声音。
能帮我分析下问题吗？
