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1# SPDX-License-Identifier: GPL-2.0-only
2# ALSA soundcard-configuration
3config SND_TIMER
4 tristate
5
6config SND_PCM
7 tristate
8 select SND_TIMER if SND_PCM_TIMER
9
10config SND_PCM_ELD
11 bool
12
13config SND_PCM_IEC958
14 bool
15
16config SND_DMAENGINE_PCM
17 tristate
18
19config SND_HWDEP
20 tristate
21
22config SND_SEQ_DEVICE
23 tristate
24
25config SND_RAWMIDI
26 tristate
27 select SND_SEQ_DEVICE if SND_SEQUENCER != n
28
29config SND_COMPRESS_OFFLOAD
30 tristate
31
32config SND_JACK
33 bool
34
35# enable input device support in jack layer
36config SND_JACK_INPUT_DEV
37 bool
38 depends on SND_JACK
39 default y if INPUT=y || INPUT=SND
40
41config SND_OSSEMUL
42 bool "Enable OSS Emulation"
43 select SOUND_OSS_CORE
44 help
45 This option enables the build of OSS emulation layer.
46
47config SND_MIXER_OSS
48 tristate "OSS Mixer API"
49 depends on SND_OSSEMUL
50 help
51 To enable OSS mixer API emulation (/dev/mixer*), say Y here
52 and read <file:Documentation/sound/designs/oss-emulation.rst>.
53
54 Many programs still use the OSS API, so say Y.
55
56 To compile this driver as a module, choose M here: the module
57 will be called snd-mixer-oss.
58
59config SND_PCM_OSS
60 tristate "OSS PCM (digital audio) API"
61 depends on SND_OSSEMUL
62 select SND_PCM
63 help
64 To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
65 here and read <file:Documentation/sound/designs/oss-emulation.rst>.
66
67 Many programs still use the OSS API, so say Y.
68
69 To compile this driver as a module, choose M here: the module
70 will be called snd-pcm-oss.
71
72config SND_PCM_OSS_PLUGINS
73 bool "OSS PCM (digital audio) API - Include plugin system"
74 depends on SND_PCM_OSS
75 default y
76 help
77 If you disable this option, the ALSA's OSS PCM API will not
78 support conversion of channels, formats and rates. It will
79 behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
80
81config SND_PCM_TIMER
82 bool "PCM timer interface" if EXPERT
83 default y
84 help
85 If you disable this option, pcm timer will be unavailable, so
86 those stubs that use pcm timer (e.g. dmix, dsnoop & co) may work
87 incorrectlly.
88
89 For some embedded devices, we may disable it to reduce memory
90 footprint, about 20KB on x86_64 platform.
91
92config SND_HRTIMER
93 tristate "HR-timer backend support"
94 depends on HIGH_RES_TIMERS
95 select SND_TIMER
96 help
97 Say Y here to enable HR-timer backend for ALSA timer. ALSA uses
98 the hrtimer as a precise timing source. The ALSA sequencer code
99 also can use this timing source.
100
101 To compile this driver as a module, choose M here: the module
102 will be called snd-hrtimer.
103
104config SND_DYNAMIC_MINORS
105 bool "Dynamic device file minor numbers"
106 help
107 If you say Y here, the minor numbers of ALSA device files in
108 /dev/snd/ are allocated dynamically. This allows you to have
109 more than 8 sound cards, but requires a dynamic device file
110 system like udev.
111
112 If you are unsure about this, say N here.
113
114config SND_MAX_CARDS
115 int "Max number of sound cards"
116 range 4 256
117 default 32
118 depends on SND_DYNAMIC_MINORS
119 help
120 Specify the max number of sound cards that can be assigned
121 on a single machine.
122
123config SND_SUPPORT_OLD_API
124 bool "Support old ALSA API"
125 default y
126 help
127 Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
128 or older).
129
130config SND_PROC_FS
131 bool "Sound Proc FS Support" if EXPERT
132 depends on PROC_FS
133 default y
134 help
135 Say 'N' to disable Sound proc FS, which may reduce code size about
136 9KB on x86_64 platform.
137 If unsure say Y.
138
139config SND_VERBOSE_PROCFS
140 bool "Verbose procfs contents"
141 depends on SND_PROC_FS
142 default y
143 help
144 Say Y here to include code for verbose procfs contents (provides
145 useful information to developers when a problem occurs). On the
146 other side, it makes the ALSA subsystem larger.
147
148config SND_VERBOSE_PRINTK
149 bool "Verbose printk"
150 help
151 Say Y here to enable verbose log messages. These messages
152 will help to identify source file and position containing
153 printed messages.
154
155 You don't need this unless you're debugging ALSA.
156
157config SND_DEBUG
158 bool "Debug"
159 help
160 Say Y here to enable ALSA debug code.
161
162config SND_DEBUG_VERBOSE
163 bool "More verbose debug"
164 depends on SND_DEBUG
165 help
166 Say Y here to enable extra-verbose debugging messages.
167
168 Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
169 So, say Y only if you are ready to be annoyed.
170
171config SND_PCM_XRUN_DEBUG
172 bool "Enable PCM ring buffer overrun/underrun debugging"
173 default n
174 depends on SND_DEBUG && SND_VERBOSE_PROCFS
175 help
176 Say Y to enable the PCM ring buffer overrun/underrun debugging.
177 It is usually not required, but if you have trouble with
178 sound clicking when system is loaded, it may help to determine
179 the process or driver which causes the scheduling gaps.
180
181config SND_VMASTER
182 bool
183
184config SND_DMA_SGBUF
185 def_bool y
186 depends on X86
187
188source "sound/core/seq/Kconfig"
1# SPDX-License-Identifier: GPL-2.0-only
2# ALSA soundcard-configuration
3config SND_TIMER
4 tristate
5
6config SND_PCM
7 tristate
8 select SND_TIMER if SND_PCM_TIMER
9
10config SND_PCM_ELD
11 bool
12
13config SND_PCM_IEC958
14 bool
15
16config SND_DMAENGINE_PCM
17 tristate
18
19config SND_HWDEP
20 tristate
21
22config SND_SEQ_DEVICE
23 tristate
24
25config SND_RAWMIDI
26 tristate
27 select SND_SEQ_DEVICE if SND_SEQUENCER != n
28
29config SND_UMP
30 tristate
31 select SND_RAWMIDI
32
33config SND_UMP_LEGACY_RAWMIDI
34 bool "Legacy raw MIDI support for UMP streams"
35 depends on SND_UMP
36 help
37 This option enables the legacy raw MIDI support for UMP streams.
38 When this option is set, an additional rawmidi device for the
39 legacy MIDI 1.0 byte streams is created for each UMP Endpoint.
40 The device contains 16 substreams corresponding to UMP groups.
41
42config SND_COMPRESS_OFFLOAD
43 tristate
44
45config SND_JACK
46 bool
47
48# enable input device support in jack layer
49config SND_JACK_INPUT_DEV
50 bool
51 depends on SND_JACK
52 default y if INPUT=y || INPUT=SND
53
54config SND_OSSEMUL
55 bool "Enable OSS Emulation"
56 select SOUND_OSS_CORE
57 help
58 This option enables the build of OSS emulation layer.
59
60config SND_MIXER_OSS
61 tristate "OSS Mixer API"
62 depends on SND_OSSEMUL
63 help
64 To enable OSS mixer API emulation (/dev/mixer*), say Y here
65 and read <file:Documentation/sound/designs/oss-emulation.rst>.
66
67 Many programs still use the OSS API, so say Y.
68
69 To compile this driver as a module, choose M here: the module
70 will be called snd-mixer-oss.
71
72config SND_PCM_OSS
73 tristate "OSS PCM (digital audio) API"
74 depends on SND_OSSEMUL
75 select SND_PCM
76 help
77 To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
78 here and read <file:Documentation/sound/designs/oss-emulation.rst>.
79
80 Many programs still use the OSS API, so say Y.
81
82 To compile this driver as a module, choose M here: the module
83 will be called snd-pcm-oss.
84
85config SND_PCM_OSS_PLUGINS
86 bool "OSS PCM (digital audio) API - Include plugin system"
87 depends on SND_PCM_OSS
88 default y
89 help
90 If you disable this option, the ALSA's OSS PCM API will not
91 support conversion of channels, formats and rates. It will
92 behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
93
94config SND_PCM_TIMER
95 bool "PCM timer interface" if EXPERT
96 default y
97 help
98 If you disable this option, pcm timer will be unavailable, so
99 those stubs that use pcm timer (e.g. dmix, dsnoop & co) may work
100 incorrectly.
101
102 For some embedded devices, we may disable it to reduce memory
103 footprint, about 20KB on x86_64 platform.
104
105config SND_HRTIMER
106 tristate "HR-timer backend support"
107 depends on HIGH_RES_TIMERS
108 select SND_TIMER
109 help
110 Say Y here to enable HR-timer backend for ALSA timer. ALSA uses
111 the hrtimer as a precise timing source. The ALSA sequencer code
112 also can use this timing source.
113
114 To compile this driver as a module, choose M here: the module
115 will be called snd-hrtimer.
116
117config SND_DYNAMIC_MINORS
118 bool "Dynamic device file minor numbers"
119 help
120 If you say Y here, the minor numbers of ALSA device files in
121 /dev/snd/ are allocated dynamically. This allows you to have
122 more than 8 sound cards, but requires a dynamic device file
123 system like udev.
124
125 If you are unsure about this, say N here.
126
127config SND_MAX_CARDS
128 int "Max number of sound cards"
129 range 4 256
130 default 32
131 depends on SND_DYNAMIC_MINORS
132 help
133 Specify the max number of sound cards that can be assigned
134 on a single machine.
135
136config SND_SUPPORT_OLD_API
137 bool "Support old ALSA API"
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_PROC_FS
144 bool "Sound Proc FS Support" if EXPERT
145 depends on PROC_FS
146 default y
147 help
148 Say 'N' to disable Sound proc FS, which may reduce code size about
149 9KB on x86_64 platform.
150 If unsure say Y.
151
152config SND_VERBOSE_PROCFS
153 bool "Verbose procfs contents"
154 depends on SND_PROC_FS
155 default y
156 help
157 Say Y here to include code for verbose procfs contents (provides
158 useful information to developers when a problem occurs). On the
159 other side, it makes the ALSA subsystem larger.
160
161config SND_VERBOSE_PRINTK
162 bool "Verbose printk"
163 help
164 Say Y here to enable verbose log messages. These messages
165 will help to identify source file and position containing
166 printed messages.
167
168 You don't need this unless you're debugging ALSA.
169
170config SND_CTL_FAST_LOOKUP
171 bool "Fast lookup of control elements" if EXPERT
172 default y
173 select XARRAY_MULTI
174 help
175 This option enables the faster lookup of control elements.
176 It will consume more memory because of the additional Xarray.
177 If you want to choose the memory footprint over the performance
178 inevitably, turn this off.
179
180config SND_DEBUG
181 bool "Debug"
182 help
183 Say Y here to enable ALSA debug code.
184
185config SND_DEBUG_VERBOSE
186 bool "More verbose debug"
187 depends on SND_DEBUG
188 help
189 Say Y here to enable extra-verbose debugging messages.
190
191 Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
192 So, say Y only if you are ready to be annoyed.
193
194config SND_PCM_XRUN_DEBUG
195 bool "Enable PCM ring buffer overrun/underrun debugging"
196 default n
197 depends on SND_DEBUG && SND_VERBOSE_PROCFS
198 help
199 Say Y to enable the PCM ring buffer overrun/underrun debugging.
200 It is usually not required, but if you have trouble with
201 sound clicking when system is loaded, it may help to determine
202 the process or driver which causes the scheduling gaps.
203
204config SND_CTL_INPUT_VALIDATION
205 bool "Validate input data to control API"
206 help
207 Say Y to enable the additional validation for the input data to
208 each control element, including the value range checks.
209 An error is returned from ALSA core for invalid inputs without
210 passing to the driver. This is a kind of hardening for drivers
211 that have no proper error checks, at the cost of a slight
212 performance overhead.
213
214config SND_CTL_DEBUG
215 bool "Enable debugging feature for control API"
216 depends on SND_DEBUG
217 help
218 Say Y to enable the debugging feature for ALSA control API.
219 It performs the additional sanity-checks for each control element
220 read access, such as whether the values returned from the driver
221 are in the proper ranges or the check of the invalid access at
222 out-of-array areas. The error is printed when the driver gives
223 such unexpected values.
224 When you develop a driver that deals with control elements, it's
225 strongly recommended to try this one once and verify whether you see
226 any relevant errors or not.
227
228config SND_JACK_INJECTION_DEBUG
229 bool "Sound jack injection interface via debugfs"
230 depends on SND_JACK && SND_DEBUG && DEBUG_FS
231 help
232 This option can be used to enable or disable sound jack
233 software injection.
234 Say Y if you are debugging via jack injection interface.
235 If unsure select "N".
236
237config SND_VMASTER
238 bool
239
240config SND_DMA_SGBUF
241 def_bool y
242 depends on X86
243
244config SND_CTL_LED
245 tristate
246 select NEW_LEDS if SND_CTL_LED
247 select LEDS_TRIGGERS if SND_CTL_LED
248 select LEDS_TRIGGER_AUDIO if SND_CTL_LED
249
250source "sound/core/seq/Kconfig"