diff --git a/drivers/gpu/drm/xe/xe_pci.c b/drivers/gpu/drm/xe/xe_pci.c
index 71be80274683..96f1ee1ea17f 100644
--- a/drivers/gpu/drm/xe/xe_pci.c
+++ b/drivers/gpu/drm/xe/xe_pci.c
@@ -617,6 +617,7 @@ static int xe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (IS_ERR(xe))
 		return PTR_ERR(xe);
 
+	xe_pm_assert_unbounded_bridge(xe);
 	subplatform_desc = find_subplatform(xe, desc);
 
 	err = xe_info_init(xe, desc, subplatform_desc);
diff --git a/drivers/gpu/drm/xe/xe_pm.c b/drivers/gpu/drm/xe/xe_pm.c
index 9a74d15052c4..20e9e522ab80 100644
--- a/drivers/gpu/drm/xe/xe_pm.c
+++ b/drivers/gpu/drm/xe/xe_pm.c
@@ -214,3 +214,17 @@ int xe_pm_runtime_get_if_active(struct xe_device *xe)
 	WARN_ON(pm_runtime_suspended(xe->drm.dev));
 	return pm_runtime_get_if_active(xe->drm.dev, true);
 }
+
+void xe_pm_assert_unbounded_bridge(struct xe_device *xe)
+{
+	struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
+	struct pci_dev *bridge = pci_upstream_bridge(pdev);
+
+	if (!bridge)
+		return;
+
+	if (!bridge->driver) {
+		drm_warn(&xe->drm, "unbounded parent pci bridge, device won't support any PM support.\n");
+		device_set_pm_not_required(&pdev->dev);
+	}
+}
diff --git a/drivers/gpu/drm/xe/xe_pm.h b/drivers/gpu/drm/xe/xe_pm.h
index 6a885585f653..8418ee6faac5 100644
--- a/drivers/gpu/drm/xe/xe_pm.h
+++ b/drivers/gpu/drm/xe/xe_pm.h
@@ -21,5 +21,6 @@ int xe_pm_runtime_get(struct xe_device *xe);
 int xe_pm_runtime_put(struct xe_device *xe);
 bool xe_pm_runtime_resume_if_suspended(struct xe_device *xe);
 int xe_pm_runtime_get_if_active(struct xe_device *xe);
+void xe_pm_assert_unbounded_bridge(struct xe_device *xe);
 
 #endif