diff --git a/drivers/amlogic/media/deinterlace/deinterlace.c b/drivers/amlogic/media/deinterlace/deinterlace.c
index 45096c0b732c3b..241a8e5f990dc4 100644
--- a/drivers/amlogic/media/deinterlace/deinterlace.c
+++ b/drivers/amlogic/media/deinterlace/deinterlace.c
@@ -358,7 +358,7 @@ static struct vframe_provider_s di_vf_prov;
 static int di_sema_init_flag;
 static struct semaphore di_sema;
 
-void trigger_pre_di_process(char idx)
+void trigger_pre_di_process(unsigned char idx)
 {
 	if (di_sema_init_flag == 0)
 		return;