bcm27xx: add support for linux v5.15

Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B

Signed-off-by: Marty Jones <mj8263788@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.15/950-0767-media-entity-Skip-non-data-links-in-graph-iteration.patch b/target/linux/bcm27xx/patches-5.15/950-0767-media-entity-Skip-non-data-links-in-graph-iteration.patch
new file mode 100644
index 0000000000..a99a529831
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0767-media-entity-Skip-non-data-links-in-graph-iteration.patch
@@ -0,0 +1,29 @@
+From 74a4bd2caa37f07786cdf3e86ad9f7cbc6977b31 Mon Sep 17 00:00:00 2001
+From: Daniel Scally <djrscally@gmail.com>
+Date: Wed, 2 Mar 2022 22:03:00 +0000
+Subject: [PATCH] media: entity: Skip non-data links in graph iteration
+
+When iterating over the media graph, don't follow links that are not
+data links.
+
+Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+Signed-off-by: Daniel Scally <djrscally@gmail.com>
+---
+ drivers/media/mc/mc-entity.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+--- a/drivers/media/mc/mc-entity.c
++++ b/drivers/media/mc/mc-entity.c
+@@ -313,6 +313,12 @@ static void media_graph_walk_iter(struct
+ 
+ 	link = list_entry(link_top(graph), typeof(*link), list);
+ 
++	/* If the link is not a data link, don't follow it */
++	if ((link->flags & MEDIA_LNK_FL_LINK_TYPE) != MEDIA_LNK_FL_DATA_LINK) {
++		link_top(graph) = link_top(graph)->next;
++		return;
++	}
++
+ 	/* The link is not enabled so we do not follow. */
+ 	if (!(link->flags & MEDIA_LNK_FL_ENABLED)) {
+ 		link_top(graph) = link_top(graph)->next;