Peter Daifuku 264691e69d gpu: nvgpu: re-enable elpg after golden img init ...

Typically, the PMU init thread will finish up long
before the golden context image has been initialized,
which means that ELPG hasn't truly been enabled at that
point.

Create a new function, nvgpu_pmu_reenable_pg(), which
checks if elpg had been enabled (non-zero refcnt), and
if so, disables then re-enables it.

Call this function from gk20a_alloc_obj_ctx() after
the golden context image has been initialized to ensure
that elpg is truly enabled.

Manually ported from dev-main

Bug 200543218

Change-Id: I0e7c4f64434c5e356829581950edce61cc88882a
Signed-off-by: Peter Daifuku <pdaifuku@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2245768
(cherry picked from commit 077b6712b5a40340ece818416002ac8431dc4138)
Reviewed-on: https://git-master.nvidia.com/r/2250091
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2019-11-29 01:23:45 -08:00

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