drm/amd/powerplay: dpm clk can be set only when performance level is manual

Add condition to make dpm clk can not be set when perfomance level isn't
equal to manual.
Add mutex lock to smu when set dpm clk.
Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/vega20_ppt.c

@@ -955,7 +955,15 @@ static int vega20_force_clk_levels(struct smu_context *smu,
 	struct vega20_dpm_table *dpm_table;
 	struct vega20_single_dpm_table *single_dpm_table;
 	uint32_t soft_min_level, soft_max_level;
-	int ret;
+	struct smu_dpm_context *smu_dpm = &smu->smu_dpm;
+	int ret = 0;
+
+	if (smu_dpm->dpm_level != AMD_DPM_FORCED_LEVEL_MANUAL) {
+		pr_info("force clock level is for dpm manual mode only.\n");
+		return -EINVAL;
+	}
+
+	mutex_lock(&(smu->mutex));
 
 	soft_min_level = mask ? (ffs(mask) - 1) : 0;
 	soft_max_level = mask ? (fls(mask) - 1) : 0;
@@ -969,7 +977,8 @@ static int vega20_force_clk_levels(struct smu_context *smu,
 		if (soft_max_level >= single_dpm_table->count) {
 			pr_err("Clock level specified %d is over max allowed %d\n",
 					soft_max_level, single_dpm_table->count - 1);
-			return -EINVAL;
+			ret = -EINVAL;
+			break;
 		}
 
 		single_dpm_table->dpm_state.soft_min_level =
@@ -980,14 +989,12 @@ static int vega20_force_clk_levels(struct smu_context *smu,
 		ret = vega20_upload_dpm_min_level(smu);
 		if (ret) {
 			pr_err("Failed to upload boot level to lowest!\n");
-			return ret;
+			break;
 		}
 
 		ret = vega20_upload_dpm_max_level(smu);
-		if (ret) {
+		if (ret)
 			pr_err("Failed to upload dpm max level to highest!\n");
-			return ret;
-		}
 
 		break;
 
@@ -997,7 +1004,8 @@ static int vega20_force_clk_levels(struct smu_context *smu,
 		if (soft_max_level >= single_dpm_table->count) {
 			pr_err("Clock level specified %d is over max allowed %d\n",
 					soft_max_level, single_dpm_table->count - 1);
-			return -EINVAL;
+			ret = -EINVAL;
+			break;
 		}
 
 		single_dpm_table->dpm_state.soft_min_level =
@@ -1008,14 +1016,12 @@ static int vega20_force_clk_levels(struct smu_context *smu,
 		ret = vega20_upload_dpm_min_level(smu);
 		if (ret) {
 			pr_err("Failed to upload boot level to lowest!\n");
-			return ret;
+			break;
 		}
 
 		ret = vega20_upload_dpm_max_level(smu);
-		if (ret) {
+		if (ret)
 			pr_err("Failed to upload dpm max level to highest!\n");
-			return ret;
-		}
 
 		break;
 
@@ -1026,7 +1032,8 @@ static int vega20_force_clk_levels(struct smu_context *smu,
 		break;
 	}
 
-	return 0;
+	mutex_unlock(&(smu->mutex));
+	return ret;
 }
 
 static int vega20_get_clock_by_type_with_latency(struct smu_context *smu,