diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 6dc21b6693bd..f2c7c85ad40c 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -208,6 +208,7 @@ static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
  * PCM runtime components
  * @rtd: ASoC PCM runtime that is activated
  * @stream: Direction of the PCM stream
+ * @action: Activate stream if 1. Deactivate if -1.
  *
  * Increments/Decrements the active count for all the DAIs and components
  * attached to a PCM runtime.