drm/amd/powerplay: some cosmetic fixes

Drop redundant check, duplicate check, duplicate setting
and fix the return value.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c

@@ -317,13 +317,6 @@ static ssize_t amdgpu_set_dpm_forced_performance_level(struct device *dev,
 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
 		return -EINVAL;
 
-	if (!amdgpu_sriov_vf(adev)) {
-		if (is_support_sw_smu(adev))
-			current_level = smu_get_performance_level(&adev->smu);
-		else if (adev->powerplay.pp_funcs->get_performance_level)
-			current_level = amdgpu_dpm_get_performance_level(adev);
-	}
-
 	if (strncmp("low", buf, strlen("low")) == 0) {
 		level = AMD_DPM_FORCED_LEVEL_LOW;
 	} else if (strncmp("high", buf, strlen("high")) == 0) {
@@ -347,6 +340,7 @@ static ssize_t amdgpu_set_dpm_forced_performance_level(struct device *dev,
 		goto fail;
 	}
 
+	/* handle sriov case here */
 	if (amdgpu_sriov_vf(adev)) {
 		if (amdgim_is_hwperf(adev) &&
 		    adev->virt.ops->force_dpm_level) {
@@ -359,6 +353,11 @@ static ssize_t amdgpu_set_dpm_forced_performance_level(struct device *dev,
 		}
 	}
 
+	if (is_support_sw_smu(adev))
+		current_level = smu_get_performance_level(&adev->smu);
+	else if (adev->powerplay.pp_funcs->get_performance_level)
+		current_level = amdgpu_dpm_get_performance_level(adev);
+
 	if (current_level == level)
 		return count;
 

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

@@ -1444,6 +1444,7 @@ int smu_adjust_power_state_dynamic(struct smu_context *smu,
 
 	if (!smu->pm_enabled)
 		return -EINVAL;
+
 	if (!skip_display_settings) {
 		ret = smu_display_config_changed(smu);
 		if (ret) {
@@ -1452,8 +1453,6 @@ int smu_adjust_power_state_dynamic(struct smu_context *smu,
 		}
 	}
 
-	if (!smu->pm_enabled)
-		return -EINVAL;
 	ret = smu_apply_clocks_adjust_rules(smu);
 	if (ret) {
 		pr_err("Failed to apply clocks adjust rules!");
@@ -1472,8 +1471,13 @@ int smu_adjust_power_state_dynamic(struct smu_context *smu,
 		ret = smu_asic_set_performance_level(smu, level);
 		if (ret) {
 			ret = smu_default_set_performance_level(smu, level);
+			if (ret) {
+				pr_err("Failed to set performance level!");
+				return ret;
 			}
-		if (!ret)
+		}
+
+		/* update the saved copy */
 		smu_dpm_ctx->dpm_level = level;
 	}
 
@@ -1533,28 +1537,18 @@ enum amd_dpm_forced_level smu_get_performance_level(struct smu_context *smu)
 
 int smu_force_performance_level(struct smu_context *smu, enum amd_dpm_forced_level level)
 {
-	int ret = 0;
-	int i;
 	struct smu_dpm_context *smu_dpm_ctx = &(smu->smu_dpm);
+	int ret = 0;
 
 	if (!smu_dpm_ctx->dpm_context)
 		return -EINVAL;
 
-	for (i = 0; i < smu->adev->num_ip_blocks; i++) {
-		if (smu->adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC)
-			break;
-	}
-
-
-	smu->adev->ip_blocks[i].version->funcs->enable_umd_pstate(smu, &level);
-	ret = smu_handle_task(smu, level,
-			      AMD_PP_TASK_READJUST_POWER_STATE);
+	ret = smu_enable_umd_pstate(smu, &level);
 	if (ret)
 		return ret;
 
-	mutex_lock(&smu->mutex);
-	smu_dpm_ctx->dpm_level = level;
-	mutex_unlock(&smu->mutex);
+	ret = smu_handle_task(smu, level,
+			      AMD_PP_TASK_READJUST_POWER_STATE);
 
 	return ret;
 }