media: subdev: Add for_each_active_route() macro

Add a for_each_active_route() macro to replace the repeated pattern of iterating on the active routes of a routing table. Signed-off-by: Jacopo Mondi <[email protected]> Signed-off-by: Tomi Valkeinen <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]>
khabeko · Jan 22, 2023 · 837f92f · 837f92f
1 parent 17bb9bf
commit 837f92f
Show file tree

Hide file tree

Showing 3 changed files with 34 additions and 0 deletions.
diff --git a/.clang-format b/.clang-format
@@ -190,6 +190,7 @@ ForEachMacros:
   - 'for_each_active_dev_scope'
   - 'for_each_active_drhd_unit'
   - 'for_each_active_iommu'
+  - 'for_each_active_route'
   - 'for_each_aggr_pgid'
   - 'for_each_available_child_of_node'
   - 'for_each_bench'

diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -1239,6 +1239,26 @@ int v4l2_subdev_set_routing(struct v4l2_subdev *sd,
 }
 EXPORT_SYMBOL_GPL(v4l2_subdev_set_routing);
 
+struct v4l2_subdev_route *
+__v4l2_subdev_next_active_route(const struct v4l2_subdev_krouting *routing,
+				struct v4l2_subdev_route *route)
+{
+	if (route)
+		++route;
+	else
+		route = &routing->routes[0];
+
+	for (; route < routing->routes + routing->num_routes; ++route) {
+		if (!(route->flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE))
+			continue;
+
+		return route;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(__v4l2_subdev_next_active_route);
+
 #endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */
 
 #endif /* CONFIG_MEDIA_CONTROLLER */

diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
@@ -1440,6 +1440,19 @@ int v4l2_subdev_set_routing(struct v4l2_subdev *sd,
 			    struct v4l2_subdev_state *state,
 			    const struct v4l2_subdev_krouting *routing);
 
+struct v4l2_subdev_route *
+__v4l2_subdev_next_active_route(const struct v4l2_subdev_krouting *routing,
+				struct v4l2_subdev_route *route);
+
+/**
+ * for_each_active_route - iterate on all active routes of a routing table
+ * @routing: The routing table
+ * @route: The route iterator
+ */
+#define for_each_active_route(routing, route) \
+	for ((route) = NULL;                  \
+	     ((route) = __v4l2_subdev_next_active_route((routing), (route)));)
+
 #endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */
 
 #endif /* CONFIG_MEDIA_CONTROLLER */