[SRU] [B/D/E/Unstable] [PATCH 0/5] Fix Goodix touchpad may drop first input event

Kai-Heng Feng kai.heng.feng at canonical.com
Tue Aug 13 18:56:49 UTC 2019


BugLink: https://bugs.launchpad.net/bugs/1840075

[Impact]
If a touchpad is connected to Intel LPSS PCI device, sometimes the first
tap event can be dropped. Goodix touchpad has a rather small buffer so
the time its parent devices spend in resuming need to be small.

[Fix]
Remove Intel LPSS D3cold delay, which is the bottleneck of the
situation.

[Test]
Intel had tested the patch and the result is positive.

[Regression Potential]
Low. Intel internally tested this so it should be rather safe.

Kai-Heng Feng (5):
  Revert "UBUNTU: SAUCE: i2c: designware: add G3 3590 into i2c quirk"
  Revert "UBUNTU: SAUCE: i2c: designware: add Inpiron 7591 into i2c
    quirk"
  Revert "UBUNTU: SAUCE: i2c: designware: add Inpiron/Vostro 7590 into
    i2c quirk"
  Revert "UBUNTU: SAUCE: i2c: designware: Add disable runtime pm quirk"
  mfd: intel-lpss: Remove D3cold delay

 drivers/i2c/busses/i2c-designware-master.c | 72 +---------------------
 drivers/mfd/intel-lpss-pci.c               |  2 +
 2 files changed, 4 insertions(+), 70 deletions(-)

-- 
2.17.1




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