1 files changed, 13 insertions, 1 deletions

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 0d1112815be3..c75c0d1a85e2 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -810,7 +810,7 @@ int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_pa
 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 
                                unsigned int cond,
                                snd_pcm_hw_param_t var,
-                               struct snd_pcm_hw_constraint_list *l);
+                               const struct snd_pcm_hw_constraint_list *l);
 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 
                                   unsigned int cond,
                                   snd_pcm_hw_param_t var,
@@ -893,6 +893,7 @@ extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
 
 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
+unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit);
 
 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
                                               struct snd_dma_buffer *bufp)
@@ -1073,4 +1074,15 @@ static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
 
 const char *snd_pcm_format_name(snd_pcm_format_t format);
 
+/**
+ * Get a string naming the direction of a stream
+ */
+static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream)
+{
+        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+                return "Playback";
+        else
+                return "Capture";
+}
+
 #endif /* __SOUND_PCM_H */