Other Parts Discussed in Thread: TLV320AIC3106, TLV320AIC3101, SYSCONFIG
Hi,
I have connected an ICS43432 I2S microphone to MCASP1 (in place of the codec).
In order to get this working, I modified the device tree (k3-am62a7-sk.dts):
diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
index 0b101d989..0e8a7c427 100644
--- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
@@ -207,7 +207,7 @@ led-0 {
default-state = "off";
};
};
-
+/*
tlv320_mclk: clk-0 {
#clock-cells = <0>;
compatible = "fixed-clock";
@@ -242,6 +242,28 @@ sound_master: simple-audio-card,codec {
clocks = <&tlv320_mclk>;
};
};
+*/
+ microphone: card-codec {
+ #sound-dai-cells = <0>;
+ compatible = "invensense,ics43432";
+ status = "okay";
+ };
+
+ mic_audio: sound {
+ compatible = "simple-audio-card";
+ simple-audio-card,format = "i2s";
+ simple-audio-card,name = "ics43432";
+ simple-audio-card,bitclock-master = <&sound_master>;
+ simple-audio-card,frame-master = <&sound_master>;
+ status = "okay";
+
+ simple-audio-card,cpu {
+ sound-dai = <&mcasp1>;
+ };
+ sound_master: simple-audio-card,codec {
+ sound-dai = <µphone>;
+ };
+ };
hdmi: connector {
compatible = "hdmi-connector";
@@ -594,18 +616,18 @@ exp2: gpio@23 {
"CSI_VLDO_SEL", "SoC_WLAN_SDIO_RST";
};
- tlv320aic3106: audio-codec@1b {
- #sound-dai-cells = <0>;
- compatible = "ti,tlv320aic3106";
- reg = <0x1b>;
- ai3x-micbias-vg = <1>; /* 2.0V */
- ai3x-ocmv = <1>; /* 1.5V */
-
- /* Regulators */
- AVDD-supply = <&vcc_3v3_sys>;
- IOVDD-supply = <&vcc_3v3_sys>;
- DRVDD-supply = <&vcc_3v3_sys>;
- };
+// tlv320aic3106: audio-codec@1b {
+// #sound-dai-cells = <0>;
+// compatible = "ti,tlv320aic3106";
+// reg = <0x1b>;
+// ai3x-micbias-vg = <1>; /* 2.0V */
+// ai3x-ocmv = <1>; /* 1.5V */
+//
+// /* Regulators */
+// AVDD-supply = <&vcc_3v3_sys>;
+// IOVDD-supply = <&vcc_3v3_sys>;
+// DRVDD-supply = <&vcc_3v3_sys>;
+// };
sii9022: sii9022@3b {
#sound-dai-cells = <0>;
I comment out the codec parts, and add a simple-sound-card with just the microphone.
The microphone gets recognized by ALSA, so there's that, but when I try to record, I get a timeout getting data.
root@am62axx-evm:~# arecord -Dhw:0 -c2 -r48000 -fS32_LE -twav -d10 -Vstereo test.wav Recording WAVE 'test.wav' : Signed 32 bit Little Endian, Rate 48000 Hz, Stereo arecord: pcm_read:2221: read error: Input/output error [ 1163.429705] ti-udma 485c0100.dma-controller: chan2 teardown timeout! root@am62axx-evm:~#
Do I have to reconfigure mcasp1 to be able to use I2S? Is there documentation on the device tree options
for the mcasp1 node?
Regards,
Bas Vermeulen
