gpu: nvgpu: reset perfmon correctly

Use mc reset HAL function to reset perfmon unit.
This will take care of delays after writing to
mc_enable register.

Change-Id: I6118bdd2a9fc9192f7ffc44617a170b7982c26ba
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1581753
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/css_gr_gk20a.c b/drivers/gpu/nvgpu/gk20a/css_gr_gk20a.c
index 366c7cb7..725ae278 100644
--- a/drivers/gpu/nvgpu/gk20a/css_gr_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/css_gr_gk20a.c
@@ -90,12 +90,9 @@ inline void css_hw_set_handled_snapshots(struct gk20a *g, u32 done)
 static void css_hw_reset_streaming(struct gk20a *g)
 {
         u32 engine_status;
-        u32 old_pmc = gk20a_readl(g, mc_enable_r());
 
         /* reset the perfmon */
-        gk20a_writel(g, mc_enable_r(),
-                                old_pmc & ~mc_enable_perfmon_enabled_f());
-        gk20a_writel(g, mc_enable_r(), old_pmc);
+        g->ops.mc.reset(g, mc_enable_perfmon_enabled_f());
 
         /* RBUFEMPTY must be set -- otherwise we'll pick up */
         /* snapshot that have been queued up from earlier   */