Sagar Kamble 3b414dbf07 gpu: nvgpu: wait for engines to go idle before suspend ...

Wait for pbdma and engine to go idle so that the tasks get completed before
suspending.

Updated the logic in gk20a_wait_engine_idle to consider the ctxsw status.
And updated PBDMA idle logic to check the pbdma status and the pb/gp
get/put pointers.

Bug 3789519
Bug 3832838

Change-Id: Ifd105bbb305eaf358423281b192f67d782d773a4
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2870162
Reviewed-by: Martin Radev <mradev@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>

2023-08-18 07:45:15 -07:00

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