Revert "drm/nouveau: pmu: Change the init value of elpg_disable_depth…

… to 1"

This reverts commit b575426.

Changing the default value is causing the existing logic(to
enable/disable ELPG) to fail.

BUG=none
TEST=See ELPG stats to confirm ELPG entry/exit.

Change-Id: I0f951686937b9e264a0bb5858667fe68a441b34e
Signed-off-by: Deepak Goyal <dgoyal@nvidia.com>
Reviewed-on: https://chromium-review.googlesource.com/311550
Commit-Ready: Mark Zhang <markz@nvidia.com>
Tested-by: Mark Zhang <markz@nvidia.com>
Reviewed-by: Mark Zhang <markz@nvidia.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>

drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gk20a.c

@@ -3180,11 +3180,7 @@ gk20a_pmu_init(struct nvkm_object *object)
 	nvkm_timer_alarm(priv, PMU_DVFS_INTERVAL, &priv->alarm);
 
 	mutex_lock(&priv->elpg_mutex);
-	/*
-	 * ELPG will be enabled when PMU finishes booting, so setting the
-	 * counter to 1 initialy.
-	 */
-	priv->elpg_disable_depth = 1;
+	priv->elpg_disable_depth = 0;
 	mutex_unlock(&priv->elpg_mutex);
 
 	mutex_lock(&priv->clk_gating_mutex);
@@ -3206,6 +3202,10 @@ gk20a_pmu_fini(struct nvkm_object *object, bool suspend)
 	cancel_work_sync(&priv->base.recv.work);
 	cancel_work_sync(&priv->pg_init);
 
+	mutex_lock(&priv->elpg_mutex);
+	priv->elpg_disable_depth = 0;
+	mutex_unlock(&priv->elpg_mutex);
+
 	mutex_lock(&priv->clk_gating_mutex);
 	priv->clk_gating_disable_depth = 0;
 	mutex_unlock(&priv->clk_gating_mutex);

drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gm20b.c

@@ -2592,6 +2592,9 @@ gm20b_pmu_fini(struct nvkm_object *object, bool suspend)
 		gk20a_pmu_enable(priv, pmc, false);
 		priv->isr_enabled = false;
 		mutex_unlock(&priv->isr_mutex);
+		mutex_lock(&priv->elpg_mutex);
+		priv->elpg_disable_depth = 0;
+		mutex_unlock(&priv->elpg_mutex);
 		priv->pmu_state = PMU_STATE_OFF;
 		mutex_lock(&priv->clk_gating_mutex);
 		priv->clk_gating_disable_depth = 0;
@@ -2668,11 +2671,7 @@ gm20b_pmu_init(struct nvkm_object *object) {
 	priv->pmu_setup_elpg = gm20b_pmu_setup_elpg;
 
 	mutex_lock(&priv->elpg_mutex);
-	/*
-	 * ELPG will be enabled when PMU finishes booting, so setting the
-	 * counter to 1 initialy.
-	 */
-	priv->elpg_disable_depth = 1;
+	priv->elpg_disable_depth = 0;
 	mutex_unlock(&priv->elpg_mutex);
 
 	mutex_lock(&priv->clk_gating_mutex);