diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn20/dcn20_resource.c
index eea2b3b307cd5..288189913e1ec 100644
--- a/drivers/gpu/drm/amd/display/dc/resource/dcn20/dcn20_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/resource/dcn20/dcn20_resource.c
@@ -920,7 +920,7 @@ struct link_encoder *dcn20_link_encoder_create(
 		kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 	int link_regs_id;
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 	link_regs_id =
diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn201/dcn201_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn201/dcn201_resource.c
index fc54483b91047..15180ad71513d 100644
--- a/drivers/gpu/drm/amd/display/dc/resource/dcn201/dcn201_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/resource/dcn201/dcn201_resource.c
@@ -797,7 +797,7 @@ static struct link_encoder *dcn201_link_encoder_create(
 		kzalloc(sizeof(struct dcn20_link_encoder), GFP_ATOMIC);
 	struct dcn10_link_encoder *enc10;
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 	enc10 = &enc20->enc10;