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→QueryEvent
** 3: ErrorNotifierEvent
** 3: ErrorNotifierEvent
* /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_id, bit27-16 contain syncpt_id.
** If bit31-28 is 0, then lower 4-bits contain event_slot, bit31-4 contains syncpt_number.
** If bit31-28 is 0, then lower 4-bits contain event_id, bit31-4 contains syncpt_id.
* /dev/nvhost-ctrl-gpu
* /dev/nvhost-ctrl-gpu
** 1: Returns error_event_handle.
** 1: Returns error_event_handle.