ALSA: hda - Add pcm_playback_hook to hda_gen_spec

The new hook which is called at each PCM playback ops.
It can be used to control the codec-specific power-saving feature in
each codec driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 14 insertions, 0 deletions

diff --git a/sound/pci/hda/hda_generic.h b/sound/pci/hda/hda_generic.h
index 4c0d9add6145..7e84c22f98b8 100644
--- a/sound/pci/hda/hda_generic.h
+++ b/sound/pci/hda/hda_generic.h
@@ -69,6 +69,14 @@ struct automic_entry {
 /* active stream id */
 enum { STREAM_MULTI_OUT, STREAM_INDEP_HP };
 
+/* PCM hook action */
+enum {
+        HDA_GEN_PCM_ACT_OPEN,
+        HDA_GEN_PCM_ACT_PREPARE,
+        HDA_GEN_PCM_ACT_CLEANUP,
+        HDA_GEN_PCM_ACT_CLOSE,
+};
+
 struct hda_gen_spec {
         char stream_name_analog[32];    /* analog PCM stream */
         const struct hda_pcm_stream *stream_analog_playback;
@@ -191,6 +199,12 @@ struct hda_gen_spec {
         void (*automute_hook)(struct hda_codec *codec);
         void (*cap_sync_hook)(struct hda_codec *codec);
 
+        /* PCM playback hook */
+        void (*pcm_playback_hook)(struct hda_pcm_stream *hinfo,
+                                  struct hda_codec *codec,
+                                  struct snd_pcm_substream *substream,
+                                  int action);
+
         /* automute / autoswitch hooks */
         void (*hp_automute_hook)(struct hda_codec *codec,
                                  struct hda_jack_tbl *tbl);