drm/amdgpu: Fix display corruption on CI with dpm enabled

with dpm enabled, need to get active crtcs in dc/no-dc mode.

caused by
'commit ebb649667a31 ("drm/amdgpu: Set pm_display_cfg in non-dc mode")'
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1878,6 +1878,7 @@ void amdgpu_pm_compute_clocks(struct amdgpu_device *adev)
 			amdgpu_fence_wait_empty(ring);
 	}
 
+	if (adev->powerplay.pp_funcs->dispatch_tasks) {
 		if (!amdgpu_device_has_dc_support(adev)) {
 			mutex_lock(&adev->pm.mutex);
 			amdgpu_dpm_get_active_displays(adev);
@@ -1893,11 +1894,10 @@ void amdgpu_pm_compute_clocks(struct amdgpu_device *adev)
 								&adev->pm.pm_display_cfg);
 			mutex_unlock(&adev->pm.mutex);
 		}
-
-	if (adev->powerplay.pp_funcs->dispatch_tasks) {
 		amdgpu_dpm_dispatch_task(adev, AMD_PP_TASK_DISPLAY_CONFIG_CHANGE, NULL);
 	} else {
 		mutex_lock(&adev->pm.mutex);
+		amdgpu_dpm_get_active_displays(adev);
 		/* update battery/ac status */
 		if (power_supply_is_system_supplied() > 0)
 			adev->pm.dpm.ac_power = true;