The I2S4 cannot record audio

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin Nano
,
1

Hello, I connected the codec SGTL5000 on i2s4 interface
Playing audio is normal, but not recording sound
My use of an Internal Loopback is normal:

amixer -c APE cset name="I2S4 Mux" "ADMAIF1"
amixer -c APE cset name="ADMAIF1 Mux" "I2S4"
amixer -c APE cset name="I2S4 Loopback" "on"
aplay -D hw:APE,0 a.wav &
arecord -d 10 -D hw:APE,0 -c 2 -r 48000 -f S16_LE test.wav

But I short-circuited I2S4_SDATA_OUT and I2S4_SDATA_IN,recorded without sound

amixer -c APE cset name="I2S4 Mux" "ADMAIF1"
amixer -c APE cset name="ADMAIF1 Mux" "I2S4"
amixer -c APE cset name="I2S4 Loopback" "off"
aplay -D hw:APE,0 a.wav &
arecord -d 10 -D hw:APE,0 -c 2 -r 48000 -f S16_LE test.wav

I used an oscilloscope to measure that the I2S4_SDATA_IN has a normal signal
This is the configuration of pinmux:

147 (dap4_sclk_pa4): 
	pull=0
	tristate=0
	enable-input=1
	open-drain=0
	io-reset=0
	rcv-sel=0
	io-hv=0
	schmitt=1
	pull-down-strength=31
	pull-up-strength=31
	drive-type=0
	gpio-mode=1
	function=i2s4
148 (dap4_dout_pa5): 
	pull=0
	tristate=0
	enable-input=0
	open-drain=0
	io-reset=0
	rcv-sel=0
	io-hv=0
	schmitt=0
	pull-down-strength=31
	pull-up-strength=31
	drive-type=0
	gpio-mode=1
	function=i2s4
149 (dap4_din_pa6): 
	pull=2
	tristate=1
	enable-input=1
	open-drain=0
	io-reset=0
	rcv-sel=0
	io-hv=0
	schmitt=1
	pull-down-strength=31
	pull-up-strength=31
	drive-type=0
	gpio-mode=1
	function=i2s4
150 (dap4_fs_pa7): 
	pull=0
	tristate=0
	enable-input=1
	open-drain=0
	io-reset=0
	rcv-sel=0
	io-hv=0
	schmitt=1
	pull-down-strength=31
	pull-up-strength=31
	drive-type=0
	gpio-mode=1
	function=i2s4

Here is the device tree:
tegra234-p3768-0000+p3767-0000-nv.dts.txt (4.6 KB)

2

Please check Audio Setup and Development — NVIDIA Jetson Linux Developer Guide 1 documentation to see if can help.

Thanks

3

The problem has already been settled.

6

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