On 3/8/21 4:35 PM, Andy Shevchenko wrote:
On Mon, Mar 08, 2021 at 04:25:05PM +0100, Maximilian Luz wrote:
Following commit 036e126c72eb ("pinctrl: intel: Split
intel_pinctrl_add_padgroups() for better maintenance"),
gpiochip_get_desc() is broken on some Kaby Lake R devices (specifically
a Microsoft Surface Book 2), returning -EINVAL for GPIOs that in reality
should be there (they are defined in ACPI and have been accessible
previously). Due to this, gpiod_get() fails with -ENOENT.
Reverting this commit fixes that issue and the GPIOs in question are
accessible again.
I would like to have more information.
Can you enable PINCTRL and GPIO debug options in the kernel, and show dmesg
output (when kernel command line has 'ignore_loglevel' option) for both working
and non-working cases?
Sure.
Here are dmesg logs for:
- Kernel v5.12-rc2 (not working): https://paste.ubuntu.com/p/HVZybcvQDH/
- Kernel v5.12-rc2 with 036e126c72eb reverted: https://paste.ubuntu.com/p/hwcXFvhcBd/
Also if it's possible to have DSDT.dsl of the device in question along with
output of `grep -H 15 /sys/bus/acpi/devices/*/status`.
You can find the DSDT and a full ACPI dump at [1] and GPIOs that fail at
[2] and [3].
[1]: https://github.com/linux-surface/acpidumps/tree/master/surface_book_2
[2]: https://github.com/linux-surface/acpidumps/blob/62972f0d806cef45ca01341e3cfbabc04c6dd583/surface_book_2/dsdt.dsl#L15274-L15285
[3]: https://github.com/linux-surface/acpidumps/blob/62972f0d806cef45ca01341e3cfbabc04c6dd583/surface_book_2/dsdt.dsl#L17947-L17982
`grep -H 15 /sys/bus/acpi/devices/*/status` yields
/sys/bus/acpi/devices/ACPI0003:00/status:15
/sys/bus/acpi/devices/ACPI000C:00/status:15
/sys/bus/acpi/devices/ACPI000E:00/status:15
/sys/bus/acpi/devices/device:16/status:15
/sys/bus/acpi/devices/device:17/status:15
/sys/bus/acpi/devices/device:31/status:15
/sys/bus/acpi/devices/device:71/status:15
/sys/bus/acpi/devices/INT33A1:00/status:15
/sys/bus/acpi/devices/INT33BE:00/status:15
/sys/bus/acpi/devices/INT3400:00/status:15
/sys/bus/acpi/devices/INT3403:01/status:15
/sys/bus/acpi/devices/INT3403:02/status:15
/sys/bus/acpi/devices/INT3403:06/status:15
/sys/bus/acpi/devices/INT3403:07/status:15
/sys/bus/acpi/devices/INT3403:08/status:15
/sys/bus/acpi/devices/INT3403:09/status:15
/sys/bus/acpi/devices/INT3403:11/status:15
/sys/bus/acpi/devices/INT3407:00/status:15
/sys/bus/acpi/devices/INT344B:00/status:15
/sys/bus/acpi/devices/INT3472:00/status:15
/sys/bus/acpi/devices/INT3472:01/status:15
/sys/bus/acpi/devices/INT3472:02/status:15
/sys/bus/acpi/devices/INT347A:00/status:15
/sys/bus/acpi/devices/INT347E:00/status:15
/sys/bus/acpi/devices/INT3F0D:00/status:15
/sys/bus/acpi/devices/LNXPOWER:07/status:15
/sys/bus/acpi/devices/MSHW0005:00/status:15
/sys/bus/acpi/devices/MSHW0029:00/status:15
/sys/bus/acpi/devices/MSHW0036:00/status:15
/sys/bus/acpi/devices/MSHW0040:00/status:15
/sys/bus/acpi/devices/MSHW0042:00/status:15
/sys/bus/acpi/devices/MSHW0045:00/status:15
/sys/bus/acpi/devices/MSHW0084:00/status:15
/sys/bus/acpi/devices/MSHW0091:00/status:15
/sys/bus/acpi/devices/MSHW0107:00/status:15
/sys/bus/acpi/devices/MSHW0133:00/status:15
/sys/bus/acpi/devices/MSHW0153:00/status:15
/sys/bus/acpi/devices/NTC0103:00/status:15
/sys/bus/acpi/devices/PNP0103:00/status:15
/sys/bus/acpi/devices/PNP0C0D:00/status:15
This output is the same for both versions.
There is probably a better option than straight up reverting this, so
consider this more of a bug-report.
Indeed.
