diff mbox series

[v11,33/36] media: subdev: Add for_each_active_route() macro

Message ID 20220301161156.1119557-34-tomi.valkeinen@ideasonboard.com (mailing list archive)
State New, archived
Headers show
Series v4l: routing and streams support | expand

Commit Message

Tomi Valkeinen March 1, 2022, 4:11 p.m. UTC 
From: Jacopo Mondi <jacopo+renesas@jmondi.org>

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 <jacopo+renesas@jmondi.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
 .clang-format                         |  1 +
 drivers/media/v4l2-core/v4l2-subdev.c | 20 ++++++++++++++++++++
 include/media/v4l2-subdev.h           | 13 +++++++++++++
 3 files changed, 34 insertions(+)
diff mbox series

Patch

diff --git a/.clang-format b/.clang-format
index fa959436bcfd..50b8bf89d519 100644
--- a/.clang-format
+++ b/.clang-format
@@ -140,6 +140,7 @@  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_bio'
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index a19236cf11b8..e30338a53088 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -1653,6 +1653,26 @@  int v4l2_subdev_routing_validate(struct v4l2_subdev *sd,
 }
 EXPORT_SYMBOL_GPL(v4l2_subdev_routing_validate);
 
+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_MEDIA_CONTROLLER */
 
 void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index f75e161d646b..1eced0f47296 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -1553,6 +1553,19 @@  int v4l2_subdev_routing_validate(struct v4l2_subdev *sd,
 				 const struct v4l2_subdev_krouting *routing,
 				 enum v4l2_subdev_routing_restriction disallow);
 
+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_MEDIA_CONTROLLER */
 
 /**