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hyphop/i2s vim3l dtb.txt

Last active August 9, 2021 08:20
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i2s vim3l
Raw
i2s vim3l dtb.txt
cd /boot/dtb
cp kvim3l_linux.dtb kvim3l_linux.dtb.org
dtc -Idtb kvim3l_linux.dtb > kvim3l_linux.dts
dtc -Idtb kvim3l_linux.dtb > kvim3l_linux.dts.org
# need to change this node aml-audio-card,dai-link@0 / codec
# need only output i2s
# grep -B19 -A4 "sound-dai = <0x71 0x71 0x73>;" kvim3l_linux.dts
sed "s/sound-dai = <0x71 0x71 0x73>;/sound-dai = <0x71>;/" kvim3l_linux.dts.org > kvim3l_linux.dts
dtc -Odtb kvim3l_linux.dts > kvim3l_linux.dtb
# DONE
diff kvim3l_linux.dts.org kvim3l_linux.dts
3241c3241
< sound-dai = <0x71 0x71 0x73>;
---
> sound-dai = <0x71>;
# reboot
# test 192K i2s
volumio@volumio:~$ aplay -c2 -fS16_LE -d1 -r192000 -Dhw:0,0 < /dev/urandom
Playing raw data 'stdin' : Signed 16 bit Little Endian, Rate 192000 Hz, Stereo
volumio@volumio:~$ aplay -c2 -fS24_LE -d1 -r192000 -Dhw:0,0 < /dev/urandom
Playing raw data 'stdin' : Signed 24 bit Little Endian, Rate 192000 Hz, Stereo
volumio@volumio:~$ aplay -c2 -fS32_LE -d1 -r192000 -Dhw:0,0 < /dev/urandom
Playing raw data 'stdin' : Signed 32 bit Little Endian, Rate 192000 Hz, Stereo
OK
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