--- zzzz-none-000/linux-3.10.107/include/media/media-entity.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/include/media/media-entity.h	2021-02-04 17:41:59.000000000 +0000
@@ -23,6 +23,8 @@
 #ifndef _MEDIA_ENTITY_H
 #define _MEDIA_ENTITY_H
 
+#include <linux/bitops.h>
+#include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/media.h>
 
@@ -42,6 +44,15 @@
 	unsigned long flags;		/* Pad flags (MEDIA_PAD_FL_*) */
 };
 
+/**
+ * struct media_entity_operations - Media entity operations
+ * @link_setup:		Notify the entity of link changes. The operation can
+ *			return an error, in which case link setup will be
+ *			cancelled. Optional.
+ * @link_validate:	Return whether a link is valid from the entity point of
+ *			view. The media_entity_pipeline_start() function
+ *			validates all links by calling this operation. Optional.
+ */
 struct media_entity_operations {
 	int (*link_setup)(struct media_entity *entity,
 			  const struct media_pad *local,
@@ -85,17 +96,7 @@
 		struct {
 			u32 major;
 			u32 minor;
-		} v4l;
-		struct {
-			u32 major;
-			u32 minor;
-		} fb;
-		struct {
-			u32 card;
-			u32 device;
-			u32 subdevice;
-		} alsa;
-		int dvb;
+		} dev;
 
 		/* Sub-device specifications */
 		/* Nothing needed yet */
@@ -113,12 +114,22 @@
 }
 
 #define MEDIA_ENTITY_ENUM_MAX_DEPTH	16
+#define MEDIA_ENTITY_ENUM_MAX_ID	64
+
+/*
+ * The number of pads can't be bigger than the number of entities,
+ * as the worse-case scenario is to have one entity linked up to
+ * MEDIA_ENTITY_ENUM_MAX_ID - 1 entities.
+ */
+#define MEDIA_ENTITY_MAX_PADS		(MEDIA_ENTITY_ENUM_MAX_ID - 1)
 
 struct media_entity_graph {
 	struct {
 		struct media_entity *entity;
 		int link;
 	} stack[MEDIA_ENTITY_ENUM_MAX_DEPTH];
+
+	DECLARE_BITMAP(entities, MEDIA_ENTITY_ENUM_MAX_ID);
 	int top;
 };
 
@@ -128,11 +139,14 @@
 
 int media_entity_create_link(struct media_entity *source, u16 source_pad,
 		struct media_entity *sink, u16 sink_pad, u32 flags);
+void __media_entity_remove_links(struct media_entity *entity);
+void media_entity_remove_links(struct media_entity *entity);
+
 int __media_entity_setup_link(struct media_link *link, u32 flags);
 int media_entity_setup_link(struct media_link *link, u32 flags);
 struct media_link *media_entity_find_link(struct media_pad *source,
 		struct media_pad *sink);
-struct media_pad *media_entity_remote_source(struct media_pad *pad);
+struct media_pad *media_entity_remote_pad(struct media_pad *pad);
 
 struct media_entity *media_entity_get(struct media_entity *entity);
 void media_entity_put(struct media_entity *entity);