[deliverable/linux.git] / sound / core / Kconfig

# ALSA soundcard-configuration
config SND_TIMER
	tristate

config SND_PCM
	tristate
	select SND_TIMER

config SND_PCM_ELD
	bool

config SND_PCM_IEC958
	bool

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_PROC_FS
        bool "Sound Proc FS Support" if EXPERT
        depends on PROC_FS
        default y
        help
          Say 'N' to disable Sound proc FS, which may reduce code size about
          9KB on x86_64 platform.
          If unsure say Y.

config SND_VERBOSE_PROCFS
	bool "Verbose procfs contents"
	depends on SND_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_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
838d1631 RK	9	config SND_PCM_ELD
	10	bool
	11
9203dd01 RK	12	config SND_PCM_IEC958
	13	bool
	14
b7ae6f31	15	config SND_DMAENGINE_PCM
903eb318	16	tristate
b7ae6f31	17
1da177e4 LT	18	config SND_HWDEP
1da177e4 LT	19	tristate
1da177e4 LT	20
	21	config SND_RAWMIDI
	22	tristate
1da177e4	23
5c845beb TI	24	config SND_COMPRESS_OFFLOAD
	25	tristate
	26
0d94e41a MB	27	# To be effective this also requires INPUT - users should say:
	28	# select SND_JACK if INPUT=y \|\| INPUT=SND
	29	# to avoid having to force INPUT on.
	30	config SND_JACK
	31	bool
	32
1da177e4 LT	33	config SND_SEQUENCER
1da177e4 LT	34	tristate "Sequencer support"
1da177e4 LT	35	select SND_TIMER
	36	help
	37	Say Y or M to enable MIDI sequencer and router support. This
	38	feature allows routing and enqueueing of MIDI events. Events
	39	can be processed at a given time.
	40
	41	Many programs require this feature, so you should enable it
	42	unless you know what you're doing.
	43
	44	config SND_SEQ_DUMMY
	45	tristate "Sequencer dummy client"
	46	depends on SND_SEQUENCER
	47	help
	48	Say Y here to enable the dummy sequencer client. This client
	49	is a simple MIDI-through client: all normal input events are
	50	redirected to the output port immediately.
	51
	52	You don't need this unless you want to connect many MIDI
	53	devices or applications together.
	54
	55	To compile this driver as a module, choose M here: the module
	56	will be called snd-seq-dummy.
	57
	58	config SND_OSSEMUL
d886e87c	59	select SOUND_OSS_CORE
1da177e4	60	bool
1da177e4 LT	61
	62	config SND_MIXER_OSS
	63	tristate "OSS Mixer API"
1da177e4 LT	64	select SND_OSSEMUL
	65	help
	66	To enable OSS mixer API emulation (/dev/mixer*), say Y here
	67	and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
	68
	69	Many programs still use the OSS API, so say Y.
	70
	71	To compile this driver as a module, choose M here: the module
	72	will be called snd-mixer-oss.
	73
	74	config SND_PCM_OSS
	75	tristate "OSS PCM (digital audio) API"
1da177e4 LT	76	select SND_OSSEMUL
	77	select SND_PCM
	78	help
	79	To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
	80	here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
	81
	82	Many programs still use the OSS API, so say Y.
	83
	84	To compile this driver as a module, choose M here: the module
	85	will be called snd-pcm-oss.
	86
21a3479a JK	87	config SND_PCM_OSS_PLUGINS
	88	bool "OSS PCM (digital audio) API - Include plugin system"
	89	depends on SND_PCM_OSS
	90	default y
	91	help
	92	If you disable this option, the ALSA's OSS PCM API will not
	93	support conversion of channels, formats and rates. It will
	94	behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
	95
1da177e4 LT	96	config SND_SEQUENCER_OSS
1da177e4 LT	97	bool "OSS Sequencer API"
89fe5117	98	depends on SND_SEQUENCER
1da177e4 LT	99	select SND_OSSEMUL
	100	help
	101	Say Y here to enable OSS sequencer emulation (both
	102	/dev/sequencer and /dev/music interfaces).
	103
	104	Many programs still use the OSS API, so say Y.
	105
c2f60c52 FD	106	If you choose M in "Sequencer support" (SND_SEQUENCER),
	107	this will be compiled as a module. The module will be called
	108	snd-seq-oss.
1da177e4	109
bbaf5e97 TI	110	config SND_HRTIMER
	111	tristate "HR-timer backend support"
	112	depends on HIGH_RES_TIMERS
	113	select SND_TIMER
	114	help
	115	Say Y here to enable HR-timer backend for ALSA timer. ALSA uses
	116	the hrtimer as a precise timing source. The ALSA sequencer code
	117	also can use this timing source.
	118
	119	To compile this driver as a module, choose M here: the module
	120	will be called snd-hrtimer.
	121
	122	config SND_SEQ_HRTIMER_DEFAULT
	123	bool "Use HR-timer as default sequencer timer"
	124	depends on SND_HRTIMER && SND_SEQUENCER
	125	default y
	126	help
	127	Say Y here to use the HR-timer backend as the default sequencer
	128	timer.
	129
1da177e4 LT	130	config SND_RTCTIMER
1da177e4 LT	131	tristate "RTC Timer support"
89fe5117	132	depends on RTC
1da177e4 LT	133	select SND_TIMER
	134	help
	135	Say Y here to enable RTC timer support for ALSA. ALSA uses
	136	the RTC timer as a precise timing source and maps the RTC
	137	timer to ALSA's timer interface. The ALSA sequencer code also
	138	can use this timing source.
	139
	140	To compile this driver as a module, choose M here: the module
	141	will be called snd-rtctimer.
	142
52948b3f TI	143	Note that this option is exclusive with the new RTC drivers
	144	(CONFIG_RTC_CLASS) since this requires the old API.
	145
a4f508b2 CL	146	config SND_SEQ_RTCTIMER_DEFAULT
	147	bool "Use RTC as default sequencer timer"
	148	depends on SND_RTCTIMER && SND_SEQUENCER
e78a37bc	149	depends on !SND_SEQ_HRTIMER_DEFAULT
a4f508b2 CL	150	default y
	151	help
	152	Say Y here to use the RTC timer as the default sequencer
	153	timer. This is strongly recommended because it ensures
	154	precise MIDI timing even when the system timer runs at less
	155	than 1000 Hz.
	156
	157	If in doubt, say Y.
	158
332682b1	159	config SND_DYNAMIC_MINORS
b10e5391	160	bool "Dynamic device file minor numbers"
332682b1 CL	161	help
	162	If you say Y here, the minor numbers of ALSA device files in
	163	/dev/snd/ are allocated dynamically. This allows you to have
	164	more than 8 sound cards, but requires a dynamic device file
	165	system like udev.
	166
	167	If you are unsure about this, say N here.
	168
7bb2491b TI	169	config SND_MAX_CARDS
	170	int "Max number of sound cards"
	171	range 4 256
	172	default 32
	173	depends on SND_DYNAMIC_MINORS
	174	help
	175	Specify the max number of sound cards that can be assigned
	176	on a single machine.
	177
59d48582 TI	178	config SND_SUPPORT_OLD_API
59d48582 TI	179	bool "Support old ALSA API"
59d48582 TI	180	default y
	181	help
	182	Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
	183	or older).
	184
e0ecb05a JY	185	config SND_PROC_FS
	186	bool "Sound Proc FS Support" if EXPERT
	187	depends on PROC_FS
	188	default y
	189	help
	190	Say 'N' to disable Sound proc FS, which may reduce code size about
	191	9KB on x86_64 platform.
	192	If unsure say Y.
	193
21a3479a JK	194	config SND_VERBOSE_PROCFS
21a3479a JK	195	bool "Verbose procfs contents"
e0ecb05a	196	depends on SND_PROC_FS
21a3479a JK	197	default y
	198	help
	199	Say Y here to include code for verbose procfs contents (provides
a982ac06	200	useful information to developers when a problem occurs). On the
21a3479a JK	201	other side, it makes the ALSA subsystem larger.
21a3479a JK	202
1da177e4 LT	203	config SND_VERBOSE_PRINTK
1da177e4 LT	204	bool "Verbose printk"
1da177e4 LT	205	help
	206	Say Y here to enable verbose log messages. These messages
	207	will help to identify source file and position containing
	208	printed messages.
	209
	210	You don't need this unless you're debugging ALSA.
	211
	212	config SND_DEBUG
	213	bool "Debug"
1da177e4 LT	214	help
	215	Say Y here to enable ALSA debug code.
	216
62cf872a TI	217	config SND_DEBUG_VERBOSE
62cf872a TI	218	bool "More verbose debug"
1da177e4 LT	219	depends on SND_DEBUG
1da177e4 LT	220	help
62cf872a TI	221	Say Y here to enable extra-verbose debugging messages.
	222
	223	Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
	224	So, say Y only if you are ready to be annoyed.
61fb63c0 JK	225
	226	config SND_PCM_XRUN_DEBUG
	227	bool "Enable PCM ring buffer overrun/underrun debugging"
	228	default n
b7d90a35	229	depends on SND_DEBUG && SND_VERBOSE_PROCFS
61fb63c0 JK	230	help
	231	Say Y to enable the PCM ring buffer overrun/underrun debugging.
	232	It is usually not required, but if you have trouble with
	233	sound clicking when system is loaded, it may help to determine
	234	the process or driver which causes the scheduling gaps.
e922b002 TI	235
	236	config SND_VMASTER
	237	bool
0528c749	238
cc6a8acd TI	239	config SND_DMA_SGBUF
	240	def_bool y
	241	depends on X86
	242
0528c749	243	source "sound/core/seq/Kconfig"