AI-64

giuliomoro

btw I am stuck waiting for proper documentation or help from TI

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1119157/tda4vm-mcasp-configuration-on-linux-via-device-tree

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1119141/tda4vm-issues-with-mcasp-documentation

AndyCap

Thanks for the info, 6 days and counting!

giuliomoro

haven't gotten a real answer yet and possibly never will.

I was told

Will be hard for TI to respond to McASP related questions. Anything McASP related comes from back when Infotainment systems were the main market for Jacinto devices.
As a disclaimer, I am not a McASP expert, so all I can do is link the relevant dts file and documentation I have found for the EVM boards from TI
https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts?h=ti-linux-5.10.y
https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-jacinto7/08_02_00_03/exports/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/Audio.html

I had previously spotted this sound in the dts:

	sound0: sound@0 {
		compatible = "ti,j721e-cpb-audio";
		model = "j721e-cpb";

		ti,cpb-mcasp = <&mcasp10>;
		ti,cpb-codec = <&pcm3168a_1>;

		clocks = <&k3_clks 184 1>,
			 <&k3_clks 184 2>, <&k3_clks 184 4>,
			 <&k3_clks 157 371>,
			 <&k3_clks 157 400>, <&k3_clks 157 401>;
		clock-names = "cpb-mcasp-auxclk",
			      "cpb-mcasp-auxclk-48000", "cpb-mcasp-auxclk-44100",
			      "cpb-codec-scki",
			      "cpb-codec-scki-48000", "cpb-codec-scki-44100";
	};

I guess those clocks may tell us something about what clocks the mcasp is using, but I find it ridiculous that one has to read kernel source because the technical reference manual is lacking information that it makes reference to ...

jarm

Hi giuliomoro @AndyCap, any news on this topic?

AndyCap

Yep, not looking good.

I had also found TI stuff from Jason Kridner on one of the chats before about this and directly asked the question here: https://forum.beagleboard.org/t/ai64-mcasp/32395 but didn't get an answer.

For me the AI64 has gone the same way as the AI32, not enough info of how to get anything to work, at least it doesn't melt though!

There may be all these cores and functionality but how do you use it, the documentation is woeful. Even CCS doesn't seem to know much about this processor, I'm think you have to be a mass purchaser to get any help.

giuliomoro

nope :-(

AndyCap

So this one seems like a no go 🙂

Just wondering where you see the bela stuff going in the future for a bit more oomph?

at_trabus

oh noooo, is this port attempt dead? 🙁 I just started tinkering around with the AI64 board and wanted this cape to be my next project with audio sampling and processing :/

ran into this when I saw pybela project and it's machine learning use cases

giuliomoro

unfortunately not, t's a lot of work and this board is really expensive and it requires a massive heatsink ... not our type

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