port from msm:
This fixes the issue where LCD takes a long time to come back up
since the execution of backlight on and late_resume works by the
suspend worker thread is delayed due to one (or more) of the
sys_sync calls in early_suspend and suspend paths taking a long
time (sometimes 15sec or more) for the below reported scenario(s):
Scenario 1 (copy with usb connected):
1. plug usb
2. adb shell
3. busybox cp /sdcard/file1 /sdcard/file2 (copy >= 100MB file1
in sdcard/emmc to file2 in sdcard/emmc)
4. press end key to suspend
5. press end key again and it takes a long time for LCD to come
back up
Scenario 2 (background copy):
1. plug usb
2. adb shell
3. busybox cp /sdcard/file1 /sdcard/file2 & (copy >= 100MB file1
in sdcard/emmc to file2 in sdcard/emmc)
4. disconnect usb
5. press end key to suspend
6. press end key again and it takes a long time for LCD to come
back up
A more common form of Scenario 2 is for the user to just use the
copy function on the UI to copy large file(s).
We address this by moving sys_sync calls to a separate workqueue
and having a timeout polling based mechanism to bail out of suspend
in case of user invoking a wakeup event (like end key press) while
we are waiting for the sys_sync completion at the synchronization
point in suspend worker thread context.
Use DEBUG_WAKEUP flag to show wakelocks that abort suspend, in
addition to showing wakelocks held during system resume.
DEBUG_WAKEUP is enabled by default.
Change-Id: If6fa68e8afbc482a5300ffab2964694b02b34f41
Signed-off-by: Todd Poynor <toddpoynor@google.com>
If the wakelock driver aborts suspend due to an already-held
wakelock, don't report the next wakelock held as the "wake up
wakelock".
Change-Id: I582ffbb87a3c361739a77d839a0c62921cff11a6
Signed-off-by: Todd Poynor <toddpoynor@google.com>
When DEBUG_SUSPEND is enabled print active wakelocks when we check
if there are any active wakelocks.
In print_active_locks(), print expired wakelocks if DEBUG_EXPIRE is enabled
Change-Id: Ib1cb795555e71ff23143a2bac7c8a58cbce16547
Signed-off-by: Mike Chan <mike@android.com>
PM: wakelock: Replace expire work with a timer
The expire work function did not work in the normal case.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
