diff --git a/drivers/gpu/drm/amd/display/dc/irq/dcn201/irq_service_dcn201.c b/drivers/gpu/drm/amd/display/dc/irq/dcn201/irq_service_dcn201.c
index 5f4f6dd79511cd9370642c75717236b7adc18f48..27dc8c9955f44e5cb8572ecfd24780894c1af36b 100644
--- a/drivers/gpu/drm/amd/display/dc/irq/dcn201/irq_service_dcn201.c
+++ b/drivers/gpu/drm/amd/display/dc/irq/dcn201/irq_service_dcn201.c
@@ -136,11 +136,6 @@ static const struct irq_source_info_funcs vupdate_no_lock_irq_info_funcs = {
 	.ack = NULL
 };
 
-static const struct irq_source_info_funcs dmub_outbox_irq_info_funcs = {
-	.set = NULL,
-	.ack = NULL
-};
-
 #undef BASE_INNER
 #define BASE_INNER(seg) DMU_BASE__INST0_SEG ## seg