@@ -1598,6 +1598,32 @@ v4l2_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state,
}
EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_opposite_stream_format);
+u64 v4l2_subdev_state_xlate_streams(const struct v4l2_subdev_state *state,
+ u32 pad0, u32 pad1, u64 *streams)
+{
+ const struct v4l2_subdev_krouting *routing = &state->routing;
+ struct v4l2_subdev_route *route;
+ u64 streams0 = 0;
+ u64 streams1 = 0;
+
+ for_each_active_route(routing, route) {
+ if (route->sink_pad == pad0 && route->source_pad == pad1 &&
+ (*streams & BIT_ULL(route->sink_stream))) {
+ streams0 |= BIT_ULL(route->sink_stream);
+ streams1 |= BIT_ULL(route->source_stream);
+ }
+ if (route->source_pad == pad0 && route->sink_pad == pad1 &&
+ (*streams & BIT_ULL(route->source_stream))) {
+ streams0 |= BIT_ULL(route->source_stream);
+ streams1 |= BIT_ULL(route->sink_stream);
+ }
+ }
+
+ *streams = streams0;
+ return streams1;
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_state_xlate_streams);
+
int v4l2_subdev_routing_validate(struct v4l2_subdev *sd,
const struct v4l2_subdev_krouting *routing,
enum v4l2_subdev_routing_restriction disallow)
@@ -1579,6 +1579,29 @@ struct v4l2_mbus_framefmt *
v4l2_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state,
u32 pad, u32 stream);
+/**
+ * v4l2_subdev_state_xlate_streams() - Translate streams from one pad to another
+ *
+ * @state: Subdevice state
+ * @pad0: The first pad
+ * @pad1: The second pad
+ * @streams: Streams bitmask on the first pad
+ *
+ * Streams on sink pads of a subdev are routed to source pads as expressed in
+ * the subdev state routing table. Stream numbers don't necessarily match on
+ * the sink and source side of a route. This function translates stream numbers
+ * on @pad0, expressed as a bitmask in @streams, to the corresponding streams
+ * on @pad1 using the routing table from the @state. It returns the stream mask
+ * on @pad1, and updates @streams with the streams that have been found in the
+ * routing table.
+ *
+ * @pad0 and @pad1 must be a sink and a source, in any order.
+ *
+ * Return: The bitmask of streams of @pad1 that are routed to @streams on @pad0.
+ */
+u64 v4l2_subdev_state_xlate_streams(const struct v4l2_subdev_state *state,
+ u32 pad0, u32 pad1, u64 *streams);
+
/**
* enum v4l2_subdev_routing_restriction - Subdevice internal routing restrictions
*