[Bug 222021] Not charging via USB C after Kernel update "underpowered" Dell XPS + workaround

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=222021

--- Comment #5 from SpliNter (splint.em85@gmail.com) ---
Update: I'm now on 7.2.9-1-cachyos (not vanilla mainline, so I
haven't tested 7.3-rc yet).
On hotplug the charger now ends upcharging, but the state is unstable for a few
seconds.
udevadmmonitor -s power_supply after plugging in the original Dell adapter
shows within ~6 s: 4 change events for ucsi-source-psy-USBC000:003,
1 for AC and 2 for BAT0 (I saw "not charging" briefly, then charging,
flipping twice).

dmesg shows "ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-5)" not only
at boot but on plug-in as well; the latest one (409.498) is logged
right after the AC change event at 409.34, so it coincides with the
hotplug.
Earlier today it stayed "not charging" on the same kernel
(at about 70% battery, it is allowed to charge up to 80%), so the problem is
intermittent.

I'm about to test mainline and patch today and report back.

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