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QueryEvent is only supported on (and implemented differently on):
QueryEvent is only supported on (and implemented differently on):
* /dev/nvhost-gpu
* /dev/nvhost-gpu
** Unknown
** 1: Unknown
** 2: Unknown
** 3: Unknown
* /dev/nvhost-ctrl: Used to get events for SyncPts.
* /dev/nvhost-ctrl: Used to get events for SyncPts.
** If bit31-28 is 1, then lower 16-bits contain event_slot, bit27-16 contain syncpt_number.  
** If bit31-28 is 1, then lower 16-bits contain event_slot, bit27-16 contain syncpt_number.