[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 #6 from SpliNter (splint.em85@gmail.com) ---
Tested mainline 7.3.0-rc6-1 (Arch AUR linux-mainline, unpatched, default
config)
Result: no change compared to 7.2.9.

- dmesg: "ucsi_acpi USBC000:00: unknown error 0" followed by "UCSI_GET_PDOS
failed (-5)" at boot (9.2 s) and again when plugging in AC while running (396.2
s, coincides with the AC event at 396.3 s).
- The desktop battery status flaps on plug-in: plugged in -> not charging ->
charging (3 changes). BAT0 ends up as "Charging".
- udevadm monitor --subsystem-match=power_supply: 4 changes of
ucsi-source-psy-USBC000:003 within ~6 s, 1x AC, 2x BAT0 (identical to 7.2.9).

udevadm monitor --subsystem-match=power_supply (AC plugged in at ~396 s):

KERNEL[394.326132] change
.../USBC000:00/power_supply/ucsi-source-psy-USBC000:003
KERNEL[394.869343] change
.../USBC000:00/power_supply/ucsi-source-psy-USBC000:003
KERNEL[396.322197] change .../ACPI0003:00/power_supply/AC
KERNEL[396.382409] change .../PNP0C0A:00/power_supply/BAT0
KERNEL[397.542787] change
.../USBC000:00/power_supply/ucsi-source-psy-USBC000:003
KERNEL[399.928510] change .../PNP0C0A:00/power_supply/BAT0
KERNEL[400.631229] change
.../USBC000:00/power_supply/ucsi-source-psy-USBC000:003

dmesg:
[    9.247627] ucsi_acpi USBC000:00: unknown error 0
[    9.247630] ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-5)
[  396.214445] ucsi_acpi USBC000:00: unknown error 0
[  396.214454] ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-5)

Next I will test 7.3.0-rc6 with the "Reset if Error" patch (attachment 310869).

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