[linux.git] / sound / core / Kconfig

# ALSA soundcard-configuration
config SND_TIMER
	tristate

config SND_PCM
	tristate
	select SND_TIMER

config SND_DMAENGINE_PCM
	tristate

config SND_HWDEP
	tristate

config SND_RAWMIDI
	tristate

config SND_COMPRESS_OFFLOAD
	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
	help
	  Say Y or M to enable MIDI sequencer and router support.  This
	  feature allows routing and enqueueing of MIDI events.  Events
	  can be processed at a given time.

	  Many programs require this feature, so you should enable it
	  unless you know what you're doing.

config SND_SEQ_DUMMY
	tristate "Sequencer dummy client"
	depends on SND_SEQUENCER
	help
	  Say Y here to enable the dummy sequencer client.  This client
	  is a simple MIDI-through client: all normal input events are
	  redirected to the output port immediately.

	  You don't need this unless you want to connect many MIDI
	  devices or applications together.

	  To compile this driver as a module, choose M here: the module
	  will be called snd-seq-dummy.

config SND_OSSEMUL
	select SOUND_OSS_CORE
	bool

config SND_MIXER_OSS
	tristate "OSS Mixer API"
	select SND_OSSEMUL
	help
	  To enable OSS mixer API emulation (/dev/mixer*), say Y here
	  and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.

	  Many programs still use the OSS API, so say Y.

	  To compile this driver as a module, choose M here: the module
	  will be called snd-mixer-oss.

config SND_PCM_OSS
	tristate "OSS PCM (digital audio) API"
	select SND_OSSEMUL
	select SND_PCM
	help
	  To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
	  here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.

	  Many programs still use the OSS API, so say Y.

	  To compile this driver as a module, choose M here: the module
	  will be called snd-pcm-oss.

config SND_PCM_OSS_PLUGINS
	bool "OSS PCM (digital audio) API - Include plugin system"
	depends on SND_PCM_OSS
        default y
	help
          If you disable this option, the ALSA's OSS PCM API will not
          support conversion of channels, formats and rates. It will
          behave like most of new OSS/Free drivers in 2.4/2.6 kernels.

config SND_SEQUENCER_OSS
	bool "OSS Sequencer API"
	depends on SND_SEQUENCER
	select SND_OSSEMUL
	help
	  Say Y here to enable OSS sequencer emulation (both
	  /dev/sequencer and /dev/music interfaces).

	  Many programs still use the OSS API, so say Y.

	  If you choose M in "Sequencer support" (SND_SEQUENCER),
	  this will be compiled as a module. The module will be called
	  snd-seq-oss.

config SND_HRTIMER
	tristate "HR-timer backend support"
	depends on HIGH_RES_TIMERS
	select SND_TIMER
	help
	  Say Y here to enable HR-timer backend for ALSA timer.  ALSA uses
	  the hrtimer as a precise timing source. The ALSA sequencer code
	  also can use this timing source.

	  To compile this driver as a module, choose M here: the module
	  will be called snd-hrtimer.

config SND_SEQ_HRTIMER_DEFAULT
	bool "Use HR-timer as default sequencer timer"
	depends on SND_HRTIMER && SND_SEQUENCER
	default y
	help
	  Say Y here to use the HR-timer backend as the default sequencer
	  timer.

config SND_RTCTIMER
	tristate "RTC Timer support"
	depends on RTC
	select SND_TIMER
	help
	  Say Y here to enable RTC timer support for ALSA.  ALSA uses
	  the RTC timer as a precise timing source and maps the RTC
	  timer to ALSA's timer interface.  The ALSA sequencer code also
	  can use this timing source.

	  To compile this driver as a module, choose M here: the module
	  will be called snd-rtctimer.

	  Note that this option is exclusive with the new RTC drivers
	  (CONFIG_RTC_CLASS) since this requires the old API.

config SND_SEQ_RTCTIMER_DEFAULT
	bool "Use RTC as default sequencer timer"
	depends on SND_RTCTIMER && SND_SEQUENCER
	depends on !SND_SEQ_HRTIMER_DEFAULT
	default y
	help
	  Say Y here to use the RTC timer as the default sequencer
	  timer.  This is strongly recommended because it ensures
	  precise MIDI timing even when the system timer runs at less
	  than 1000 Hz.

	  If in doubt, say Y.

config SND_DYNAMIC_MINORS
	bool "Dynamic device file minor numbers"
	help
	  If you say Y here, the minor numbers of ALSA device files in
	  /dev/snd/ are allocated dynamically.  This allows you to have
	  more than 8 sound cards, but requires a dynamic device file
	  system like udev.

	  If you are unsure about this, say N here.

config SND_MAX_CARDS
	int "Max number of sound cards"
	range 4 256
	default 32
	depends on SND_DYNAMIC_MINORS
	help
	  Specify the max number of sound cards that can be assigned
	  on a single machine.

config SND_SUPPORT_OLD_API
	bool "Support old ALSA API"
	default y
	help
	  Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
	  or older).

config SND_VERBOSE_PROCFS
	bool "Verbose procfs contents"
	depends on PROC_FS
	default y
	help
	  Say Y here to include code for verbose procfs contents (provides
          useful information to developers when a problem occurs).  On the
          other side, it makes the ALSA subsystem larger.

config SND_VERBOSE_PRINTK
	bool "Verbose printk"
	help
	  Say Y here to enable verbose log messages.  These messages
	  will help to identify source file and position containing
	  printed messages.

	  You don't need this unless you're debugging ALSA.

config SND_DEBUG
	bool "Debug"
	help
	  Say Y here to enable ALSA debug code.

config SND_DEBUG_VERBOSE
	bool "More verbose debug"
	depends on SND_DEBUG
	help
	  Say Y here to enable extra-verbose debugging messages.
	  
	  Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
	  So, say Y only if you are ready to be annoyed.

config SND_PCM_XRUN_DEBUG
	bool "Enable PCM ring buffer overrun/underrun debugging"
	default n
	depends on SND_DEBUG && SND_VERBOSE_PROCFS
	help
	  Say Y to enable the PCM ring buffer overrun/underrun debugging.
	  It is usually not required, but if you have trouble with
	  sound clicking when system is loaded, it may help to determine
	  the process or driver which causes the scheduling gaps.

config SND_VMASTER
	bool

config SND_KCTL_JACK
	bool

config SND_DMA_SGBUF
	def_bool y
	depends on X86

source "sound/core/seq/Kconfig"
Commit	Line	Data
1da177e4 LT	1	# ALSA soundcard-configuration
	2	config SND_TIMER
	3	tristate
1da177e4 LT	4
	5	config SND_PCM
	6	tristate
	7	select SND_TIMER
1da177e4	8
b7ae6f31	9	config SND_DMAENGINE_PCM
903eb318	10	tristate
b7ae6f31	11
1da177e4 LT	12	config SND_HWDEP
1da177e4 LT	13	tristate
1da177e4 LT	14
	15	config SND_RAWMIDI
	16	tristate
1da177e4	17
5c845beb TI	18	config SND_COMPRESS_OFFLOAD
	19	tristate
	20
0d94e41a MB	21	# To be effective this also requires INPUT - users should say:
	22	# select SND_JACK if INPUT=y \|\| INPUT=SND
	23	# to avoid having to force INPUT on.
	24	config SND_JACK
	25	bool
	26
1da177e4 LT	27	config SND_SEQUENCER
1da177e4 LT	28	tristate "Sequencer support"
1da177e4 LT	29	select SND_TIMER
	30	help
	31	Say Y or M to enable MIDI sequencer and router support. This
	32	feature allows routing and enqueueing of MIDI events. Events
	33	can be processed at a given time.
	34
	35	Many programs require this feature, so you should enable it
	36	unless you know what you're doing.
	37
	38	config SND_SEQ_DUMMY
	39	tristate "Sequencer dummy client"
	40	depends on SND_SEQUENCER
	41	help
	42	Say Y here to enable the dummy sequencer client. This client
	43	is a simple MIDI-through client: all normal input events are
	44	redirected to the output port immediately.
	45
	46	You don't need this unless you want to connect many MIDI
	47	devices or applications together.
	48
	49	To compile this driver as a module, choose M here: the module
	50	will be called snd-seq-dummy.
	51
	52	config SND_OSSEMUL
d886e87c	53	select SOUND_OSS_CORE
1da177e4	54	bool
1da177e4 LT	55
	56	config SND_MIXER_OSS
	57	tristate "OSS Mixer API"
1da177e4 LT	58	select SND_OSSEMUL
	59	help
	60	To enable OSS mixer API emulation (/dev/mixer*), say Y here
	61	and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
	62
	63	Many programs still use the OSS API, so say Y.
	64
	65	To compile this driver as a module, choose M here: the module
	66	will be called snd-mixer-oss.
	67
	68	config SND_PCM_OSS
	69	tristate "OSS PCM (digital audio) API"
1da177e4 LT	70	select SND_OSSEMUL
	71	select SND_PCM
	72	help
	73	To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
	74	here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
	75
	76	Many programs still use the OSS API, so say Y.
	77
	78	To compile this driver as a module, choose M here: the module
	79	will be called snd-pcm-oss.
	80
21a3479a JK	81	config SND_PCM_OSS_PLUGINS
	82	bool "OSS PCM (digital audio) API - Include plugin system"
	83	depends on SND_PCM_OSS
	84	default y
	85	help
	86	If you disable this option, the ALSA's OSS PCM API will not
	87	support conversion of channels, formats and rates. It will
	88	behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
	89
1da177e4 LT	90	config SND_SEQUENCER_OSS
1da177e4 LT	91	bool "OSS Sequencer API"
89fe5117	92	depends on SND_SEQUENCER
1da177e4 LT	93	select SND_OSSEMUL
	94	help
	95	Say Y here to enable OSS sequencer emulation (both
	96	/dev/sequencer and /dev/music interfaces).
	97
	98	Many programs still use the OSS API, so say Y.
	99
c2f60c52 FD	100	If you choose M in "Sequencer support" (SND_SEQUENCER),
	101	this will be compiled as a module. The module will be called
	102	snd-seq-oss.
1da177e4	103
bbaf5e97 TI	104	config SND_HRTIMER
	105	tristate "HR-timer backend support"
	106	depends on HIGH_RES_TIMERS
	107	select SND_TIMER
	108	help
	109	Say Y here to enable HR-timer backend for ALSA timer. ALSA uses
	110	the hrtimer as a precise timing source. The ALSA sequencer code
	111	also can use this timing source.
	112
	113	To compile this driver as a module, choose M here: the module
	114	will be called snd-hrtimer.
	115
	116	config SND_SEQ_HRTIMER_DEFAULT
	117	bool "Use HR-timer as default sequencer timer"
	118	depends on SND_HRTIMER && SND_SEQUENCER
	119	default y
	120	help
	121	Say Y here to use the HR-timer backend as the default sequencer
	122	timer.
	123
1da177e4 LT	124	config SND_RTCTIMER
1da177e4 LT	125	tristate "RTC Timer support"
89fe5117	126	depends on RTC
1da177e4 LT	127	select SND_TIMER
	128	help
	129	Say Y here to enable RTC timer support for ALSA. ALSA uses
	130	the RTC timer as a precise timing source and maps the RTC
	131	timer to ALSA's timer interface. The ALSA sequencer code also
	132	can use this timing source.
	133
	134	To compile this driver as a module, choose M here: the module
	135	will be called snd-rtctimer.
	136
52948b3f TI	137	Note that this option is exclusive with the new RTC drivers
	138	(CONFIG_RTC_CLASS) since this requires the old API.
	139
a4f508b2 CL	140	config SND_SEQ_RTCTIMER_DEFAULT
	141	bool "Use RTC as default sequencer timer"
	142	depends on SND_RTCTIMER && SND_SEQUENCER
e78a37bc	143	depends on !SND_SEQ_HRTIMER_DEFAULT
a4f508b2 CL	144	default y
	145	help
	146	Say Y here to use the RTC timer as the default sequencer
	147	timer. This is strongly recommended because it ensures
	148	precise MIDI timing even when the system timer runs at less
	149	than 1000 Hz.
	150
	151	If in doubt, say Y.
	152
332682b1	153	config SND_DYNAMIC_MINORS
b10e5391	154	bool "Dynamic device file minor numbers"
332682b1 CL	155	help
	156	If you say Y here, the minor numbers of ALSA device files in
	157	/dev/snd/ are allocated dynamically. This allows you to have
	158	more than 8 sound cards, but requires a dynamic device file
	159	system like udev.
	160
	161	If you are unsure about this, say N here.
	162
7bb2491b TI	163	config SND_MAX_CARDS
	164	int "Max number of sound cards"
	165	range 4 256
	166	default 32
	167	depends on SND_DYNAMIC_MINORS
	168	help
	169	Specify the max number of sound cards that can be assigned
	170	on a single machine.
	171
59d48582 TI	172	config SND_SUPPORT_OLD_API
59d48582 TI	173	bool "Support old ALSA API"
59d48582 TI	174	default y
	175	help
	176	Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
	177	or older).
	178
21a3479a JK	179	config SND_VERBOSE_PROCFS
21a3479a JK	180	bool "Verbose procfs contents"
89fe5117	181	depends on PROC_FS
21a3479a JK	182	default y
	183	help
	184	Say Y here to include code for verbose procfs contents (provides
a982ac06	185	useful information to developers when a problem occurs). On the
21a3479a JK	186	other side, it makes the ALSA subsystem larger.
21a3479a JK	187
1da177e4 LT	188	config SND_VERBOSE_PRINTK
1da177e4 LT	189	bool "Verbose printk"
1da177e4 LT	190	help
	191	Say Y here to enable verbose log messages. These messages
	192	will help to identify source file and position containing
	193	printed messages.
	194
	195	You don't need this unless you're debugging ALSA.
	196
	197	config SND_DEBUG
	198	bool "Debug"
1da177e4 LT	199	help
	200	Say Y here to enable ALSA debug code.
	201
62cf872a TI	202	config SND_DEBUG_VERBOSE
62cf872a TI	203	bool "More verbose debug"
1da177e4 LT	204	depends on SND_DEBUG
1da177e4 LT	205	help
62cf872a TI	206	Say Y here to enable extra-verbose debugging messages.
	207
	208	Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
	209	So, say Y only if you are ready to be annoyed.
61fb63c0 JK	210
	211	config SND_PCM_XRUN_DEBUG
	212	bool "Enable PCM ring buffer overrun/underrun debugging"
	213	default n
b7d90a35	214	depends on SND_DEBUG && SND_VERBOSE_PROCFS
61fb63c0 JK	215	help
	216	Say Y to enable the PCM ring buffer overrun/underrun debugging.
	217	It is usually not required, but if you have trouble with
	218	sound clicking when system is loaded, it may help to determine
	219	the process or driver which causes the scheduling gaps.
e922b002 TI	220
	221	config SND_VMASTER
	222	bool
0528c749	223
35be544a TI	224	config SND_KCTL_JACK
	225	bool
	226
cc6a8acd TI	227	config SND_DMA_SGBUF
	228	def_bool y
	229	depends on X86
	230
0528c749	231	source "sound/core/seq/Kconfig"