diff options
| author | Takashi Iwai <tiwai@suse.de> | 2010-03-30 18:03:44 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-03-30 18:03:44 +0200 |
| commit | a68d5a5419d2a15161488b20f740115068e7b666 (patch) | |
| tree | 75249110bd358f068835ad87d1f47f99f4962038 /sound/pci/hda/hda_codec.h | |
| parent | ad35879aa192e783db2d41c196f48f3fc059ce22 (diff) | |
ALSA: hda - introduce snd_hda_codec_update_cache()
Add a new helper, snd_hda_codec_update_cache(), for reducing the unneeded
verbs. This function checks the cached value and skips if it's identical
with the given one. Otherwise it works like snd_hda_codec_write_cache().
The alc269 code uses this function as an example.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_codec.h')
| -rw-r--r-- | sound/pci/hda/hda_codec.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h index b75da47571e..49e939e7e5c 100644 --- a/sound/pci/hda/hda_codec.h +++ b/sound/pci/hda/hda_codec.h @@ -885,9 +885,12 @@ int snd_hda_codec_write_cache(struct hda_codec *codec, hda_nid_t nid, int direct, unsigned int verb, unsigned int parm); void snd_hda_sequence_write_cache(struct hda_codec *codec, const struct hda_verb *seq); +int snd_hda_codec_update_cache(struct hda_codec *codec, hda_nid_t nid, + int direct, unsigned int verb, unsigned int parm); void snd_hda_codec_resume_cache(struct hda_codec *codec); #else #define snd_hda_codec_write_cache snd_hda_codec_write +#define snd_hda_codec_update_cache snd_hda_codec_write #define snd_hda_sequence_write_cache snd_hda_sequence_write #endif |