Hi,

On Wed, 8 Dec 2021 21:57:00 +0100
Pavel Machek [off-list ref] wrote:

Hi!

You may want to cc: linux-kernel@vger.kernel.org and
phone-devel@vger.kernel.org, since this is kernel issue.

quoted

quoted

I am back with a bit more news, but no solution.  

It looks like commit fb2c599f056640d289b2147fbe6d9eaee689f1b2 ("ARM:
omap3: enable off mode automatically") is causing these failures on the
Nokia N900. Reverting this commit on top of v5.10 (with
21b2cec61c04bd175f0860d9411a472d5a0e7ba1 also reverted), makes the
problem go away (I tried 10 times).

The same holds for 5.15.y, just reverting
fb2c599f056640d289b2147fbe6d9eaee689f1b2 makes the system "stable" (at
least the problem reported in the first email is gone).

Perhaps the "pwrst->next_state" change is causing these problems, since
I can enter OFF mode just fine with init=/bin/sh and a custom
script?  

fb2c599f056640d28 has some hints in it. Perhaps Andreas can mention
what boards he tested it on?

well, I tested it on gta04a4 and gta04a5 (both dm3730).
There is one 1Ghz issue at least on the a5, so I disabled that opp.

And rather than reverting it, we may want to delete ti,twl4030-idle*
hints from n900 device tree for now?

well, it has side effects on power consumption, power consumption
should be worse without ti,twl4030-idle-*. So the real solution would
be to understand what is causing the trouble here.

Regards,
Andreas