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gpu: nvgpu: tegra: Fix EMC frequency scaling

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Before this commit call to EMC BWMGR in postscale procedure was skipped
when GPU rail is ON (= GPU is running). It should be the other way
around - call should be skipped when GPU is rail-gated.

Bug 200267304

Change-Id: Id4da84b3d0ed0606017cc53a58e2917d486fa13e
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-on: http://git-master/r/1479769
(cherry picked from commit ab22d66386)
Reviewed-on: http://git-master/r/1482812
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Shreshtha Sahu <ssahu@nvidia.com>
Reviewed-by: Rajkumar Kasirajan <rkasirajan@nvidia.com>
Tested-by: Rajkumar Kasirajan <rkasirajan@nvidia.com>
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Winnie Hsu <whsu@nvidia.com>
This commit is contained in:
Alex Frid
2017-05-10 21:35:03 -07:00
committed by mobile promotions
parent 47cd4860f0
commit d7e3da9b8b
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/nvgpu/gk20a/platform_gk20a_tegra.c
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@@ -358,7 +358,7 @@ static void gm20b_tegra_postscale(struct device *dev, unsigned long freq)
emc_params->freq_last_set = emc_rate;
nvgpu_mutex_acquire(&platform->railgate_lock);
if (platform->is_railgated && !platform->is_railgated(dev))
if (platform->is_railgated && platform->is_railgated(dev))
goto done;
tegra_bwmgr_set_emc(emc_params->bwmgr_cl, emc_rate,