Deepak Nibade 0334d7e303 gpu: nvgpu: unrailgate only if pm_domains not enabled ...

Currently we unrailgate the GPU if railgating is not enabled
or pm_domains are not enabled

But in case if railgating is not enabled and pm_domains
are enabled, we explicitly unrailgate GPU in gk20a_pm_init()
and then runtime PM unrailgates it again when first user
space request arrives - setting unrailgate refcount to 2

Now for gk20a_do_idle(), we need to railgate the GPU in
fist call but that does not happen since unrailgate
refcount != 1

hence, in case railgating is not enabled, we should
unrailgate the GPU from only one place i.e. when first user
space request arrives

Bug 200142989
Bug 200137963
Bug 1678611

Reviewed-on: http://git-master/r/820321
(cherry picked from commit 452a1ff8da8e3f47caed2371440f9ad150bf8699)

Change-Id: Ic9fe2267c9df5629315c30c1404c2b3044c1265a
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/822296
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sachin Nikam <snikam@nvidia.com>

2015-10-26 01:53:15 -07:00

..

gpu/nvgpu

gpu: nvgpu: unrailgate only if pm_domains not enabled

2015-10-26 01:53:15 -07:00