Sachit Kadle 6ac44d2813 gpu: nvgpu: take platform power ref at power on ...

Currently, host1x power refcount may decrement
to 0, while GPU is still powered on and we're still
servicing IRQs. So to prevent this situation,,
take a ref while GPU is being powered on, and
decrement it during power off. Since we are always
holding one reference while GPU is powered on,
we can remove this handling from gk20a_busy/idle()

Bug 200187507

Change-Id: I249a4527178537c1dc53d769411f53c4451352c3
Signed-off-by: Sachit Kadle <skadle@nvidia.com>
Reviewed-on: http://git-master/r/1172320
(cherry picked from commit 3e27e6a5820f5c1ad05596553d75e8979b71f1bd)
Reviewed-on: http://git-master/r/1172607
(cherry picked from commit 1e01a49fdc)
Reviewed-on: http://git-master/r/1185175
GVS: Gerrit_Virtual_Submit
Reviewed-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

2016-07-26 21:09:11 -07:00

..

nvgpu

gpu: nvgpu: take platform power ref at power on

2016-07-26 21:09:11 -07:00