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>
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index b75da47..49e939e 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -885,9 +885,12 @@
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