3 files changed, 34 insertions, 0 deletions

diff --git a/drivers/gpu/drm/omapdrm/dss/display.c b/drivers/gpu/drm/omapdrm/dss/display.c
index e567ff68b216..94c012e0584b 100644
--- a/drivers/gpu/drm/omapdrm/dss/display.c
+++ b/drivers/gpu/drm/omapdrm/dss/display.c
@@ -132,6 +132,24 @@ void omapdss_unregister_display(struct omap_dss_device *dssdev)
 }
 EXPORT_SYMBOL(omapdss_unregister_display);
 
+bool omapdss_component_is_display(struct device_node *node)
+{
+        struct omap_dss_device *dssdev;
+        bool found = false;
+
+        mutex_lock(&panel_list_mutex);
+        list_for_each_entry(dssdev, &panel_list, panel_list) {
+                if (dssdev->dev->of_node == node) {
+                        found = true;
+                        goto out;
+                }
+        }
+out:
+        mutex_unlock(&panel_list_mutex);
+        return found;
+}
+EXPORT_SYMBOL(omapdss_component_is_display);
+
 struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev)
 {
         if (!try_module_get(dssdev->owner))
diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
index 4545f1824e66..7e1feb935137 100644
--- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
+++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
@@ -936,4 +936,7 @@ struct dispc_ops {
 void dispc_set_ops(const struct dispc_ops *o);
 const struct dispc_ops *dispc_get_ops(void);
 
+bool omapdss_component_is_display(struct device_node *node);
+bool omapdss_component_is_output(struct device_node *node);
+
 #endif /* __OMAP_DRM_DSS_H */
diff --git a/drivers/gpu/drm/omapdrm/dss/output.c b/drivers/gpu/drm/omapdrm/dss/output.c
index 2b999dc48621..655c5d73eac9 100644
--- a/drivers/gpu/drm/omapdrm/dss/output.c
+++ b/drivers/gpu/drm/omapdrm/dss/output.c
@@ -107,6 +107,19 @@ void omapdss_unregister_output(struct omap_dss_device *out)
 }
 EXPORT_SYMBOL(omapdss_unregister_output);
 
+bool omapdss_component_is_output(struct device_node *node)
+{
+        struct omap_dss_device *out;
+
+        list_for_each_entry(out, &output_list, list) {
+                if (out->dev->of_node == node)
+                        return true;
+        }
+
+        return false;
+}
+EXPORT_SYMBOL(omapdss_component_is_output);
+
 struct omap_dss_device *omap_dss_get_output(enum omap_dss_output_id id)
 {
         struct omap_dss_device *out;