drm/bridge: panel: Name an associated backlight device

Pass the DRM connector name to any configured backlight device so that userspace can associate the two items. Ideally this should be in drm_panel, but it is bridge/panel that creates the drm_connector and therefore knows the name. Signed-off-by: Dave Stevenson <[email protected]>
raspberrypi · May 17, 2024 · 97d00cb · 97d00cb
1 parent 7a8a376
commit 97d00cb
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
@@ -14,6 +14,7 @@
 #include <drm/drm_panel.h>
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
+#include <linux/backlight.h>
 
 struct panel_bridge {
 	struct drm_bridge bridge;
@@ -86,6 +87,9 @@ static int panel_bridge_attach(struct drm_bridge *bridge,
 	drm_connector_attach_encoder(&panel_bridge->connector,
 					  bridge->encoder);
 
+	backlight_set_display_name(panel_bridge->panel->backlight,
+				   panel_bridge->connector.name);
+
 	if (bridge->dev->registered) {
 		if (connector->funcs->reset)
 			connector->funcs->reset(connector);