Public bug reported:
[Impact]
Some LG touchscreens reported themselves as generic touch devices,
actually it is multitouch devices.
Even after adding IDs in hid-multitouch, hid-generic will bind the device still.
multitouch features are not supported.
[Fix]
commit e04a0442 make hid-generic work nicely with other drivers like
hid-multitouch.
If other drivers match the devices, hid-generic will step back.
This patch will benefit many devices to support their own drivers without
adding IDs.
[Test]
Verified on LG/ELAN/RAYDIUM touchscreens with positive results.
[Regression Potential]
Medium.
commit e04a0442 is included by 4.16 kernel, only bionic kernel should be
applied.
This commit is based on the other 3 patches, mostly changes are moving codes
to hid-quirk.c.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Affects: linux-oem (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: Incomplete
** Affects: linux-oem (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux
Importance: Undecided
Status: New
** No longer affects: linux
** Also affects: linux-oem (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-oem (Ubuntu Bionic)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1862567
Title:
[SRU][B/OEM-B] Fix multitouch support on some devices
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