On Sat, 2 Sep 2023 09:27:41 +0200 "H. Nikolaus Schaller" hns@goldelico.com wrote:
Hi Tony, we are still struggling with ABE/AESS on the OMAP4/5 (PandaES, Pyra, OMAP5UEVM, BT-200).
Symptoms are that
- pmem access will be broken after initializing the ABE-DSP
- it seems the AES DSP is not running (and leads to timeouts when sending audio data to the buffers)
- boot issues on BT-200
What we have found is that a TI kernel v3.8 works on the OMAP5EVM but newer kernels start to fail.
A major observation ist that hwmods have been removed in smaller pieces and the last removal was in v5.6: c33ff4c864d2b ARM: OMAP2+: Drop unused PRM defines for omap4
There are also some other unknown factors in our code where we do not know how to port to modern kernels:
- there is a context lost code but how to make use of it?
- pmem fails unless we disable omap_aess_write_event_generator(aess, EVENT_TIMER);
It seems as if clocks and code like omap_hwmod_aess_preprogram() is missing. Especially for the omap4 we have found no equivalent to aess_fclk which exists for omap5 and dra7. Nowhere is a reference using the abe_iclk node.
for omap4 I guess the clocks = <&abe_clkctrl OMAP4_AESS_CLKCTRL 0>;
in omap4-l4-abe.dtsi should be enough and correcly referencing fclk?
Regards, Andreas