}
EXPORT_SYMBOL_GPL(v4l2_subdev_disable_streams);
+int v4l2_subdev_s_stream_helper(struct v4l2_subdev *sd, int enable)
+{
+ struct v4l2_subdev_state *state;
+ struct v4l2_subdev_route *route;
+ struct media_pad *pad;
+ u64 source_mask = 0;
+ int pad_index = -1;
+
+ /*
+ * Find the source pad. This helper is meant for subdevs that have a
+ * single source pad, so failures shouldn't happen, but catch them
+ * loudly nonetheless as they indicate a driver bug.
+ */
+ media_entity_for_each_pad(&sd->entity, pad) {
+ if (pad->flags & MEDIA_PAD_FL_SOURCE) {
+ pad_index = pad->index;
+ break;
+ }
+ }
+
+ if (WARN_ON(pad_index == -1))
+ return -EINVAL;
+
+ /*
+ * As there's a single source pad, just collect all the source streams.
+ */
+ state = v4l2_subdev_lock_and_get_active_state(sd);
+
+ for_each_active_route(&state->routing, route)
+ source_mask |= BIT_ULL(route->source_stream);
+
+ v4l2_subdev_unlock_state(state);
+
+ if (enable)
+ return v4l2_subdev_enable_streams(sd, pad_index, source_mask);
+ else
+ return v4l2_subdev_disable_streams(sd, pad_index, source_mask);
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_s_stream_helper);
+
#endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */
#endif /* CONFIG_MEDIA_CONTROLLER */
int v4l2_subdev_disable_streams(struct v4l2_subdev *sd, u32 pad,
u64 streams_mask);
+/**
+ * v4l2_subdev_s_stream_helper() - Helper to implement the subdev s_stream
+ * operation using enable_streams and disable_streams
+ * @sd: The subdevice
+ * @enable: Enable or disable streaming
+ *
+ * Subdevice drivers that implement the streams-aware
+ * &v4l2_subdev_pad_ops.enable_streams and &v4l2_subdev_pad_ops.disable_streams
+ * operations can use this helper to implement the legacy
+ * &v4l2_subdev_video_ops.s_stream operation.
+ *
+ * This helper can only be used by subdevs that have a single source pad.
+ *
+ * Return: 0 on success, or a negative error code otherwise.
+ */
+int v4l2_subdev_s_stream_helper(struct v4l2_subdev *sd, int enable);
+
#endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */
#endif /* CONFIG_MEDIA_CONTROLLER */