[PATCH 0/4] [SRU][B/OEM-B] Fix multitouch support on some devices

[Aaron Ma]

BugLink: https://bugs.launchpad.net/bugs/1862567

SRU justification:

[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.
Backports are during to the other backports patches, these changes are
moved to
hid-quirk.c too.

Benjamin Tissoires (4):
  HID: core: move the dynamic quirks handling in core
  HID: quirks: move the list of special devices into a quirk
  HID: core: move the list of ignored devices in hid-quirks.c
  HID: core: remove the absolute need of hid_have_special_driver[]

 drivers/hid/Makefile            |    2 +-
 drivers/hid/hid-core.c          |  951 ++---------------------
 drivers/hid/hid-generic.c       |   68 +-
 drivers/hid/hid-quirks.c        | 1267 +++++++++++++++++++++++++++++++
 drivers/hid/usbhid/Makefile     |    2 +-
 drivers/hid/usbhid/hid-core.c   |   10 +-
 drivers/hid/usbhid/hid-quirks.c |  405 ----------
 include/linux/hid.h             |   21 +-
 net/bluetooth/hidp/core.c       |    2 +-
 9 files changed, 1414 insertions(+), 1314 deletions(-)
 create mode 100644 drivers/hid/hid-quirks.c
 delete mode 100644 drivers/hid/usbhid/hid-quirks.c

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2.17.1