I've managed to get a hacky, fragile config working, in the sense that it sends my tlv320aic3104 samples from speaker-test, and the clocks and data all look good on the oscilloscope, and it ping-pongs between the left and right channel.
But it's outputting the signal on the HPLOUT/HPROUT pins, not the L&R Line Out pins.
My DTS has this:
fragment@3 { target = <&ocp>; __overlay__ { sound { compatible = "ti,da830-evm-audio"; ti,model = "DA830 EVM"; ti,audio-codec = <&tlv320aic3x>; ti,mcasp-controller = <&mcasp0>; ti,codec-clock-rate = <12000000>; ti,audio-routing = "Line Out", "LLOUT", "Line Out", "RLOUT"; }; }; };
The original had:
"Headphone Jack", "HPLOUT", "Headphone Jack", "HPROUT", "LINE1L", "Line In", "LINE1R", "Line In";
I also have an asound.state file I got from the Audio Cape:
https://raw.githubusercontent.com/CircuitCo/BeagleBone-Audio/files/asound.st...
I don't really know how to interpret that file. One resource online said it held the current state of the system. I guess that suggests I should play with amixer. But how does the DTS routing come into play?
Thanks,