drm/amd/powerplay: refine code to support no-dpm case

With "dpm=0", there will be no DPM enabled. The code
needs to be refined to support this.
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/powerplay/amd_powerplay.c

@@ -927,9 +927,12 @@ static int pp_dpm_set_mp1_state(void *handle, enum pp_mp1_state mp1_state)
 {
 	struct pp_hwmgr *hwmgr = handle;
 
-	if (!hwmgr || !hwmgr->pm_en)
+	if (!hwmgr)
 		return -EINVAL;
 
+	if (!hwmgr->pm_en)
+		return 0;
+
 	if (hwmgr->hwmgr_func->set_mp1_state)
 		return hwmgr->hwmgr_func->set_mp1_state(hwmgr, mp1_state);
 

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

@@ -1363,6 +1363,9 @@ static int smu_hw_fini(void *handle)
 		smu_powergate_jpeg(&adev->smu, true);
 	}
 
+	if (!smu->pm_enabled)
+		return 0;
+
 	if (!amdgpu_sriov_vf(adev)){
 		ret = smu_stop_thermal_control(smu);
 		if (ret) {
@@ -1435,6 +1438,9 @@ static int smu_suspend(void *handle)
 	struct smu_context *smu = &adev->smu;
 	bool baco_feature_is_enabled = false;
 
+	if (!smu->pm_enabled)
+		return 0;
+
 	if(!smu->is_apu)
 		baco_feature_is_enabled = smu_feature_is_enabled(smu, SMU_FEATURE_BACO_BIT);
 

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

@@ -2176,8 +2176,12 @@ static const struct i2c_algorithm arcturus_i2c_eeprom_i2c_algo = {
 static int arcturus_i2c_eeprom_control_init(struct i2c_adapter *control)
 {
 	struct amdgpu_device *adev = to_amdgpu_device(control);
+	struct smu_context *smu = &adev->smu;
 	int res;
 
+	if (!smu->pm_enabled)
+		return -EOPNOTSUPP;
+
 	control->owner = THIS_MODULE;
 	control->class = I2C_CLASS_SPD;
 	control->dev.parent = &adev->pdev->dev;
@@ -2193,6 +2197,12 @@ static int arcturus_i2c_eeprom_control_init(struct i2c_adapter *control)
 
 static void arcturus_i2c_eeprom_control_fini(struct i2c_adapter *control)
 {
+	struct amdgpu_device *adev = to_amdgpu_device(control);
+	struct smu_context *smu = &adev->smu;
+
+	if (!smu->pm_enabled)
+		return;
+
 	i2c_del_adapter(control);
 }