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ALSA: Build jack detection

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Since jack detection requires the input subsystem which may not be
desired on small systems it is not built unless required by a driver
that is being built. Drivers using jack detection should use a pattern
like this:

config SND_FOO
        tristate "..."
        ...
        select SND_JACK if INPUT=y || INPUT=SND

to ensure that the jack detection API is enabled if the input subsystem
is.  If the input subsystem is not enabled then a stub version of the
API is provided.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Mark Brown 2008-07-28 19:05:36 +01:00 • committed by Jaroslav Kysela
commit 0d94e41abe
2 changed files with 7 additions and 0 deletions
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6
sound/core/Kconfig
View file

@ -12,6 +12,12 @@ config SND_HWDEP
config SND_RAWMIDI
tristate
# To be effective this also requires INPUT - users should say:
# select SND_JACK if INPUT=y || INPUT=SND
# to avoid having to force INPUT on.
config SND_JACK
bool
config SND_SEQUENCER
tristate "Sequencer support"
select SND_TIMER

1
sound/core/Makefile
View file

@ -7,6 +7,7 @@ snd-y := sound.o init.o memory.o info.o control.o misc.o device.o
snd-$(CONFIG_ISA_DMA_API) += isadma.o
snd-$(CONFIG_SND_OSSEMUL) += sound_oss.o info_oss.o
snd-$(CONFIG_SND_VMASTER) += vmaster.o
snd-$(CONFIG_SND_JACK) += jack.o
snd-pcm-objs := pcm.o pcm_native.o pcm_lib.o pcm_timer.o pcm_misc.o \
pcm_memory.o