Suspend on the Pocket Reform iMX 8M Plus SOM

[tookmund]

I would love to have suspend working on my pocket reform. I understand that this is not a current focus of the team, as they have moved to getting this enabled for newer SOMs, but I think it would be an interesting project, though I expect it may be well outside of my skills.

It looks like there’s been some previous work on a workaround:

Downclocking or limiting i.MX8MP? (interim fix for suspend)

Yesterday I did a very quick test with things like: screen off turn off wifi radio almost all daemons (including bluetooth and network-manager) and almost no programs running. set cpu frequency to 1.2Ghz My notes are on the Reform itself but I can not boot it right now, don´t remember if I did something else. It went from 57% to 34% in 1:30 hours, which would translate to 6:30 hours from 100% to 0%. I did not shut down cpu cores, but I’ll try that too. Also, the user session resides on a cgr…

Has there been any work done on fixing suspend properly for the imx8mp pocket?

Is there any reason why it couldn’t work, beyond just needing someone to dig into the issue?

I’d be happy to try and see how far I can go, but I don’t want to invest time into something that’s not going to be possible.

[loonylion]

you don’t know it’s outside your skill until you try

[minute]

It’s probably not super difficult if you have enough persistence to try enabling/disabling drivers until you narrow it down to the one(s) that currently prevend suspend/resume from working. Before shipping Pocket Reform with i.MX8MP, I had it working. It just regressed in the kernel.