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The recent laptops have usually two LEDs assigned to reflect the speaker and microphone mute state. This implementation adds a tiny layer on top of the control API which calculates the state for those LEDs using the driver callbacks. Two new access flags are introduced to describe the controls which affects the audio path settings (an easy code change for drivers). The LED resource can be shared with multiple sound cards with this code. The user space controls may be added to the state chain on demand, too. This code should replace the LED code in the HDA driver and add a possibility to easy extend the other drivers (ASoC codecs etc.). Signed-off-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20210317172945.842280-4-perex@perex.cz Signed-off-by: Takashi Iwai <tiwai@suse.de>
213 lines
5.5 KiB
Plaintext
213 lines
5.5 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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# ALSA soundcard-configuration
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config SND_TIMER
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tristate
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config SND_PCM
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tristate
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select SND_TIMER if SND_PCM_TIMER
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config SND_PCM_ELD
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bool
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config SND_PCM_IEC958
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bool
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config SND_DMAENGINE_PCM
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tristate
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config SND_HWDEP
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tristate
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config SND_SEQ_DEVICE
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tristate
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config SND_RAWMIDI
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tristate
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select SND_SEQ_DEVICE if SND_SEQUENCER != n
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config SND_COMPRESS_OFFLOAD
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tristate
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config SND_JACK
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bool
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# enable input device support in jack layer
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config SND_JACK_INPUT_DEV
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bool
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depends on SND_JACK
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default y if INPUT=y || INPUT=SND
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config SND_OSSEMUL
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bool "Enable OSS Emulation"
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select SOUND_OSS_CORE
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help
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This option enables the build of OSS emulation layer.
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config SND_MIXER_OSS
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tristate "OSS Mixer API"
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depends on SND_OSSEMUL
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help
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To enable OSS mixer API emulation (/dev/mixer*), say Y here
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and read <file:Documentation/sound/designs/oss-emulation.rst>.
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Many programs still use the OSS API, so say Y.
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To compile this driver as a module, choose M here: the module
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will be called snd-mixer-oss.
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config SND_PCM_OSS
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tristate "OSS PCM (digital audio) API"
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depends on SND_OSSEMUL
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select SND_PCM
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help
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To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
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here and read <file:Documentation/sound/designs/oss-emulation.rst>.
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Many programs still use the OSS API, so say Y.
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To compile this driver as a module, choose M here: the module
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will be called snd-pcm-oss.
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config SND_PCM_OSS_PLUGINS
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bool "OSS PCM (digital audio) API - Include plugin system"
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depends on SND_PCM_OSS
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default y
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help
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If you disable this option, the ALSA's OSS PCM API will not
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support conversion of channels, formats and rates. It will
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behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
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config SND_PCM_TIMER
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bool "PCM timer interface" if EXPERT
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default y
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help
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If you disable this option, pcm timer will be unavailable, so
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those stubs that use pcm timer (e.g. dmix, dsnoop & co) may work
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incorrectlly.
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For some embedded devices, we may disable it to reduce memory
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footprint, about 20KB on x86_64 platform.
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config SND_HRTIMER
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tristate "HR-timer backend support"
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depends on HIGH_RES_TIMERS
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select SND_TIMER
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help
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Say Y here to enable HR-timer backend for ALSA timer. ALSA uses
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the hrtimer as a precise timing source. The ALSA sequencer code
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also can use this timing source.
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To compile this driver as a module, choose M here: the module
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will be called snd-hrtimer.
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config SND_DYNAMIC_MINORS
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bool "Dynamic device file minor numbers"
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help
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If you say Y here, the minor numbers of ALSA device files in
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/dev/snd/ are allocated dynamically. This allows you to have
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more than 8 sound cards, but requires a dynamic device file
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system like udev.
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If you are unsure about this, say N here.
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config SND_MAX_CARDS
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int "Max number of sound cards"
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range 4 256
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default 32
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depends on SND_DYNAMIC_MINORS
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help
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Specify the max number of sound cards that can be assigned
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on a single machine.
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config SND_SUPPORT_OLD_API
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bool "Support old ALSA API"
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default y
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help
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Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
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or older).
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config SND_PROC_FS
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bool "Sound Proc FS Support" if EXPERT
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depends on PROC_FS
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default y
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help
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Say 'N' to disable Sound proc FS, which may reduce code size about
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9KB on x86_64 platform.
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If unsure say Y.
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config SND_VERBOSE_PROCFS
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bool "Verbose procfs contents"
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depends on SND_PROC_FS
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default y
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help
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Say Y here to include code for verbose procfs contents (provides
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useful information to developers when a problem occurs). On the
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other side, it makes the ALSA subsystem larger.
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config SND_VERBOSE_PRINTK
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bool "Verbose printk"
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help
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Say Y here to enable verbose log messages. These messages
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will help to identify source file and position containing
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printed messages.
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You don't need this unless you're debugging ALSA.
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config SND_DEBUG
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bool "Debug"
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help
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Say Y here to enable ALSA debug code.
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config SND_DEBUG_VERBOSE
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bool "More verbose debug"
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depends on SND_DEBUG
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help
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Say Y here to enable extra-verbose debugging messages.
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Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
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So, say Y only if you are ready to be annoyed.
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config SND_PCM_XRUN_DEBUG
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bool "Enable PCM ring buffer overrun/underrun debugging"
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default n
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depends on SND_DEBUG && SND_VERBOSE_PROCFS
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help
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Say Y to enable the PCM ring buffer overrun/underrun debugging.
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It is usually not required, but if you have trouble with
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sound clicking when system is loaded, it may help to determine
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the process or driver which causes the scheduling gaps.
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config SND_CTL_VALIDATION
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bool "Perform sanity-checks for each control element access"
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depends on SND_DEBUG
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help
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Say Y to enable the additional validation of each control element
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access, including sanity-checks like whether the values returned
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from the driver are in the proper ranges or the check of the invalid
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access at out-of-array areas.
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config SND_JACK_INJECTION_DEBUG
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bool "Sound jack injection interface via debugfs"
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depends on SND_JACK && SND_DEBUG && DEBUG_FS
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help
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This option can be used to enable or disable sound jack
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software injection.
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Say Y if you are debugging via jack injection interface.
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If unsure select "N".
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config SND_VMASTER
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bool
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config SND_DMA_SGBUF
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def_bool y
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depends on X86
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config SND_CTL_LED
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tristate
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select NEW_LEDS if SND_CTL_LED
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select LEDS_TRIGGERS if SND_CTL_LED
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select LEDS_TRIGGER_AUDIO if SND_CTL_LED
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source "sound/core/seq/Kconfig"
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