gpu: nvgpu: wait for 500 usec before ce reset

Wait for 500 usec before ce reset to ensure that
no memory outstanding requests are pending.

Bug 1699365

Change-Id: I9f73f87cbbdca0208e95ebaee32dd1f764a3cd4f
Signed-off-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: http://git-master/r/1116679
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index a382ccd1..8eb02db8 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -1805,7 +1805,10 @@ void gk20a_enable(struct gk20a *g, u32 units)
 void gk20a_reset(struct gk20a *g, u32 units)
 {
         gk20a_disable(g, units);
-        udelay(20);
+        if (units & mc_enable_ce2_enabled_f())
+                udelay(500);
+        else
+                udelay(20);
         gk20a_enable(g, units);
 }