[PATCH 0/1][SRU][I/OEM-5.13/OEM-5.14] Fix cursor jump issue of Elan Trackpoint on ThinkPad AMD

[Aaron Ma]

BugLink: https://bugs.launchpad.net/bugs/1936295

[Impact]
The trackpoint cursor often suddenly jumps to an edge/corner, because
the hardware/firmware sometimes reports wrong coordinates / loses sync.

[Fix]
Ignore the buggy data reported by Elan TP firmware, make the TP usable.

[Test]
Tested on ThinkPad AMD X13 and users confirm on other platforms.

[Where problems could occur]
It's limited to specific Elan device, it may break the Elan Trackpoint.

Jammy already got this commit in Ubuntu-5.15.0-12.12

Phoenix Huang (1):
  Input: elantench - fix misreporting trackpoint coordinates

 drivers/input/mouse/elantech.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

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2.30.2