[ALSA] Add virtual master control helpers

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Added helper functions to implement virtual master volume controls.
The virtual master control is a control element that has multiple
slave controls.  The value of master element is equally added to
slave elements.
The functions are written for general purpose, but it's put in the
HD-audio directory as now, since HD-audio driver is the only user.
It should be moved to the common place once after other drivers use
vmaster.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

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Takashi Iwai 2008-01-10 16:52:42 +01:00 • committed by Jaroslav Kysela

parent ab40d4f12c

commit 3b0a5f22d4

3 changed files with 372 additions and 1 deletions

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2

sound/pci/hda/Makefile

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7

sound/pci/hda/hda_local.h

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364

sound/pci/hda/vmaster.c

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