ALSA: hda - introduce snd_hda_codec_update_cache()

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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>

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This commit is contained in:

Takashi Iwai 2010-03-30 18:03:44 +02:00

parent ad35879aa1

commit a68d5a5419

3 changed files with 62 additions and 14 deletions

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68

sound/pci/hda/hda_codec.c

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3

sound/pci/hda/hda_codec.h

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5

sound/pci/hda/patch_realtek.c

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