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, 60 insertions, 5 deletions

diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
index 296628b6ffc2..28ad5e98b341 100644
--- a/sound/pci/hda/hda_generic.c
+++ b/sound/pci/hda/hda_generic.c
@@ -3261,6 +3261,16 @@ EXPORT_SYMBOL_HDA(snd_hda_gen_build_controls);
  * PCM definitions
  */
 
+static void call_pcm_playback_hook(struct hda_pcm_stream *hinfo,
+                                   struct hda_codec *codec,
+                                   struct snd_pcm_substream *substream,
+                                   int action)
+{
+        struct hda_gen_spec *spec = codec->spec;
+        if (spec->pcm_playback_hook)
+                spec->pcm_playback_hook(hinfo, codec, substream, action);
+}
+
 /*
  * Analog playback callbacks
  */
@@ -3275,8 +3285,11 @@ static int playback_pcm_open(struct hda_pcm_stream *hinfo,
         err = snd_hda_multi_out_analog_open(codec,
                                             &spec->multiout, substream,
                                              hinfo);
-        if (!err)
+        if (!err) {
                 spec->active_streams |= 1 << STREAM_MULTI_OUT;
+                call_pcm_playback_hook(hinfo, codec, substream,
+                                       HDA_GEN_PCM_ACT_OPEN);
+        }
         mutex_unlock(&spec->pcm_mutex);
         return err;
 }
@@ -3288,8 +3301,14 @@ static int playback_pcm_prepare(struct hda_pcm_stream *hinfo,
                                 struct snd_pcm_substream *substream)
 {
         struct hda_gen_spec *spec = codec->spec;
-        return snd_hda_multi_out_analog_prepare(codec, &spec->multiout,
-                                                stream_tag, format, substream);
+        int err;
+
+        err = snd_hda_multi_out_analog_prepare(codec, &spec->multiout,
+                                               stream_tag, format, substream);
+        if (!err)
+                call_pcm_playback_hook(hinfo, codec, substream,
+                                       HDA_GEN_PCM_ACT_PREPARE);
+        return err;
 }
 
 static int playback_pcm_cleanup(struct hda_pcm_stream *hinfo,
@@ -3297,7 +3316,13 @@ static int playback_pcm_cleanup(struct hda_pcm_stream *hinfo,
                                 struct snd_pcm_substream *substream)
 {
         struct hda_gen_spec *spec = codec->spec;
-        return snd_hda_multi_out_analog_cleanup(codec, &spec->multiout);
+        int err;
+
+        err = snd_hda_multi_out_analog_cleanup(codec, &spec->multiout);
+        if (!err)
+                call_pcm_playback_hook(hinfo, codec, substream,
+                                       HDA_GEN_PCM_ACT_CLEANUP);
+        return err;
 }
 
 static int playback_pcm_close(struct hda_pcm_stream *hinfo,
@@ -3307,6 +3332,8 @@ static int playback_pcm_close(struct hda_pcm_stream *hinfo,
         struct hda_gen_spec *spec = codec->spec;
         mutex_lock(&spec->pcm_mutex);
         spec->active_streams &= ~(1 << STREAM_MULTI_OUT);
+        call_pcm_playback_hook(hinfo, codec, substream,
+                               HDA_GEN_PCM_ACT_CLOSE);
         mutex_unlock(&spec->pcm_mutex);
         return 0;
 }
@@ -3323,6 +3350,8 @@ static int alt_playback_pcm_open(struct hda_pcm_stream *hinfo,
                 err = -EBUSY;
         else
                 spec->active_streams |= 1 << STREAM_INDEP_HP;
+        call_pcm_playback_hook(hinfo, codec, substream,
+                               HDA_GEN_PCM_ACT_OPEN);
         mutex_unlock(&spec->pcm_mutex);
         return err;
 }
@@ -3334,10 +3363,34 @@ static int alt_playback_pcm_close(struct hda_pcm_stream *hinfo,
         struct hda_gen_spec *spec = codec->spec;
         mutex_lock(&spec->pcm_mutex);
         spec->active_streams &= ~(1 << STREAM_INDEP_HP);
+        call_pcm_playback_hook(hinfo, codec, substream,
+                               HDA_GEN_PCM_ACT_CLOSE);
         mutex_unlock(&spec->pcm_mutex);
         return 0;
 }
 
+static int alt_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
+                                    struct hda_codec *codec,
+                                    unsigned int stream_tag,
+                                    unsigned int format,
+                                    struct snd_pcm_substream *substream)
+{
+        snd_hda_codec_setup_stream(codec, hinfo->nid, stream_tag, 0, format);
+        call_pcm_playback_hook(hinfo, codec, substream,
+                               HDA_GEN_PCM_ACT_PREPARE);
+        return 0;
+}
+
+static int alt_playback_pcm_cleanup(struct hda_pcm_stream *hinfo,
+                                    struct hda_codec *codec,
+                                    struct snd_pcm_substream *substream)
+{
+        snd_hda_codec_cleanup_stream(codec, hinfo->nid);
+        call_pcm_playback_hook(hinfo, codec, substream,
+                               HDA_GEN_PCM_ACT_CLEANUP);
+        return 0;
+}
+
 /*
  * Digital out
  */
@@ -3432,7 +3485,9 @@ static const struct hda_pcm_stream pcm_analog_alt_playback = {
         /* NID is set in build_pcms */
         .ops = {
                 .open = alt_playback_pcm_open,
-                .close = alt_playback_pcm_close
+                .close = alt_playback_pcm_close,
+                .prepare = alt_playback_pcm_prepare,
+                .cleanup = alt_playback_pcm_cleanup
         },
 };