Sagar Kamble c99819ffd8 gpu: nvgpu: acquire platforms clocks on floorsweeping gpc ...

bpmp will floorsweep GPCs as per parameters to tpc_pg_mask sysfs.
While doing that corresponding GPC clocks are also disabled.
nvgpu should re-initialize the clocks every time the
GPC/TPC pg_masks are passed to bpmp mrq.

Also print error when clk_prepare_enable fails.

Introduce platform->clks_lock to protect access to platform->clks
and platform->num_clks done from unrailgate/railgate and bpmp
mrq set calls from sysfs.

Acquire static_pg_lock in railgate path to synchronize railgate
with sysfs.

Bug 3688506

Change-Id: I3203d78b87289e7a847d78b3117e2d3119be3425
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2738920
(cherry picked from commit 28ddb0996f)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2741029
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
GVS: Gerrit_Virtual_Submit

2022-07-08 06:08:20 -07:00

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