xref: /openbmc/linux/sound/core/Kconfig (revision c2f60c52) 
1# ALSA soundcard-configuration
2config SND_TIMER
3	tristate
4	depends on SND
5
6config SND_PCM
7	tristate
8	select SND_TIMER
9	depends on SND
10
11config SND_HWDEP
12	tristate
13	depends on SND
14
15config SND_RAWMIDI
16	tristate
17	depends on SND
18
19config SND_SEQUENCER
20	tristate "Sequencer support"
21	depends on SND
22	select SND_TIMER
23	help
24	  Say Y or M to enable MIDI sequencer and router support.  This
25	  feature allows routing and enqueueing of MIDI events.  Events
26	  can be processed at a given time.
27
28	  Many programs require this feature, so you should enable it
29	  unless you know what you're doing.
30
31config SND_SEQ_DUMMY
32	tristate "Sequencer dummy client"
33	depends on SND_SEQUENCER
34	help
35	  Say Y here to enable the dummy sequencer client.  This client
36	  is a simple MIDI-through client: all normal input events are
37	  redirected to the output port immediately.
38
39	  You don't need this unless you want to connect many MIDI
40	  devices or applications together.
41
42	  To compile this driver as a module, choose M here: the module
43	  will be called snd-seq-dummy.
44
45config SND_OSSEMUL
46	bool
47	depends on SND
48
49config SND_MIXER_OSS
50	tristate "OSS Mixer API"
51	depends on SND
52	select SND_OSSEMUL
53	help
54	  To enable OSS mixer API emulation (/dev/mixer*), say Y here
55	  and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
56
57	  Many programs still use the OSS API, so say Y.
58
59	  To compile this driver as a module, choose M here: the module
60	  will be called snd-mixer-oss.
61
62config SND_PCM_OSS
63	tristate "OSS PCM (digital audio) API"
64	depends on SND
65	select SND_OSSEMUL
66	select SND_PCM
67	help
68	  To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
69	  here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
70
71	  Many programs still use the OSS API, so say Y.
72
73	  To compile this driver as a module, choose M here: the module
74	  will be called snd-pcm-oss.
75
76config SND_PCM_OSS_PLUGINS
77	bool "OSS PCM (digital audio) API - Include plugin system"
78	depends on SND_PCM_OSS
79        default y
80	help
81          If you disable this option, the ALSA's OSS PCM API will not
82          support conversion of channels, formats and rates. It will
83          behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
84
85config SND_SEQUENCER_OSS
86	bool "OSS Sequencer API"
87	depends on SND && SND_SEQUENCER
88	select SND_OSSEMUL
89	help
90	  Say Y here to enable OSS sequencer emulation (both
91	  /dev/sequencer and /dev/music interfaces).
92
93	  Many programs still use the OSS API, so say Y.
94
95	  If you choose M in "Sequencer support" (SND_SEQUENCER),
96	  this will be compiled as a module. The module will be called
97	  snd-seq-oss.
98
99config SND_RTCTIMER
100	tristate "RTC Timer support"
101	depends on SND && RTC
102	select SND_TIMER
103	help
104	  Say Y here to enable RTC timer support for ALSA.  ALSA uses
105	  the RTC timer as a precise timing source and maps the RTC
106	  timer to ALSA's timer interface.  The ALSA sequencer code also
107	  can use this timing source.
108
109	  To compile this driver as a module, choose M here: the module
110	  will be called snd-rtctimer.
111
112config SND_SEQ_RTCTIMER_DEFAULT
113	bool "Use RTC as default sequencer timer"
114	depends on SND_RTCTIMER && SND_SEQUENCER
115	default y
116	help
117	  Say Y here to use the RTC timer as the default sequencer
118	  timer.  This is strongly recommended because it ensures
119	  precise MIDI timing even when the system timer runs at less
120	  than 1000 Hz.
121
122	  If in doubt, say Y.
123
124config SND_DYNAMIC_MINORS
125	bool "Dynamic device file minor numbers (EXPERIMENTAL)"
126	depends on SND && EXPERIMENTAL
127	help
128	  If you say Y here, the minor numbers of ALSA device files in
129	  /dev/snd/ are allocated dynamically.  This allows you to have
130	  more than 8 sound cards, but requires a dynamic device file
131	  system like udev.
132
133	  If you are unsure about this, say N here.
134
135config SND_SUPPORT_OLD_API
136	bool "Support old ALSA API"
137	depends on SND
138	default y
139	help
140	  Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
141	  or older).
142
143config SND_VERBOSE_PROCFS
144	bool "Verbose procfs contents"
145	depends on SND
146	default y
147	help
148	  Say Y here to include code for verbose procfs contents (provides
149          usefull information to developers when a problem occurs). On the
150          other side, it makes the ALSA subsystem larger.
151
152config SND_VERBOSE_PRINTK
153	bool "Verbose printk"
154	depends on SND
155	help
156	  Say Y here to enable verbose log messages.  These messages
157	  will help to identify source file and position containing
158	  printed messages.
159
160	  You don't need this unless you're debugging ALSA.
161
162config SND_DEBUG
163	bool "Debug"
164	depends on SND
165	help
166	  Say Y here to enable ALSA debug code.
167
168config SND_DEBUG_DETECT
169	bool "Debug detection"
170	depends on SND_DEBUG
171	help
172	  Say Y here to enable extra-verbose log messages printed when
173	  detecting devices.
174