[RFC 0/1] Input: elants_i2c - Do not bind to i2c-hid compatible ACPI instantiated devices

[Hans de Goede <hdegoede@redhat.com>]

Hi All,

Here is a patch which should fix the touchscreen issues some people have
been seeing on some recent Lenovo AMD CPU using models:
https://bugzilla.kernel.org/show_bug.cgi?id=207759

There are 2 reasons why this is a RFC:

1. It is compile-tested only ATM, I'm waiting for feedback from the
reporters of the issue.

2. The fix which I wrote is somewhat simple. It should work, but there
might be older touchscreens which actually need to use the Elan specific
protocol implemented by elants_i2c.ko; while the ACPI-fwnode describing
the touchscreen falsely contains one of the i2c-hid ACPI compatiblity-id
strings. This would of course be a bug in the ACPI tables, but I have
seen this before.

2. might lead to regressions (or it might be a non-issue) so I was hoping
for some input on this from Benjamin as he originally wroter the elants_i2c
code.

Regards,

Hans



Hans de Goede (1):
  Input: elants_i2c - Do not bind to i2c-hid compatible ACPI
    instantiated devices

 drivers/input/touchscreen/elants_i2c.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

-- 
2.30.1