** Changed in: hwe-next/vivid
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1535513
Title:
Enable suspend function for i2c-hid device in Vivid
Status in HWE Next:
Fix Committed
Status in HWE Next vivid series:
Fix Committed
Status in linux package in Ubuntu:
Triaged
Bug description:
[Impact]
On some platforms the touchpad relies on pinctrl devices to provide GPIO
interrupt, but in 3.19.0 pinctrl-cherryview doesn't support suspend well and
will lose the config after suspend/resume, then touchpad can't be used.
Also, there is a racing condition in i2c-hid module which makes
touchpad unusable when waking up.
[Fix]
This fix has two parts. First part is to enable the suspend/resume function
in pinctrl-cherryview:
commit 9eb457b547cc731bc2fc251bd79891a60c64fc3e
Refs: [HEAD]
Author: Mika Westerberg <[email protected]>
Date: Thu Dec 4 12:32:50 2014 +0200
pinctrl: cherryview: Save and restore pin configs over system
sleep
The second part is to eliminate the racing condition in i2c-hid:
commit 9a327405014f4ef4cdad67a0686db82b9f23c62c
Author: Mika Westerberg <[email protected]>
Date: Mon Dec 21 15:26:31 2015 +0200
HID: i2c-hid: Prevent sending reports from racing with device
reset
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