Part Number:AM3358
Tool/software: Linux
Hello.I am following the below post and trying to play audio on PCM5102A I2S board, connected to PocketBeagle header.
e2e.ti.com/.../458085
I am using the official Debian image (with PCM5102A driver eneabled).
So far (according to dmesg output) the drivers are initialized and newly created ALSA output device can be seen.
>[ 1.553224] asoc-simple-card sound: ASoC: binding davinci-mcasp.0-pcm5102a-hifi
>[ 1.662191] asoc-simple-card sound: pcm5102a-hifi 48038000.mcasp mapping ok
>[ 1.666676] asoc-simple-card sound: ASoC: no DMI vendor name!
>[ 1.697221] ALSA device list:
>[ 1.697236] #0: I2S slave playback
The problem is, trying 'aplay', but no sound on I2S device.
The header pins are listed as follows in dtb.
0x190 0x8 /* P1.36 mcasp0_aclkx */
0x194 0x8 /* P1.33 mcasp0_fsx */
0x198 0x8 /* P2.32 mcasp0_axr0 */
I examined the pins with osilloscope, but I think there is no signal there.
(Looks like P1.36 left open, P1.33, P2.32 pulled down to GND without signal?)
I think there are at least two points I should look into next, but I am not sure how to.
1) mcasp0 driver is it working?
2) pinmux functioning so that I am seeing mcasp pins on P1.36/P1.33/P2.34 physical pins?
Sorry I am new to pinmuxing.
Maybe looking into some debugfs files I can be sure my pinmux definitions are working as expected?