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- menu "Sound support"
- config SOUND
- bool "Enable sound support"
- help
- Support making sounds through an audio codec. This is normally a
- beep at a chosen frequency for a selected length of time. However
- the drivers support playing arbitrary sound samples using a
- PCM interface.
- Note: At present the sound setup is somewhat tangled up in that the
- audio codecs are called from the sound-i2s code. This could be
- converted to driver model.
- config I2S
- bool "Enable I2S support"
- depends on SOUND
- help
- I2S is a serial bus often used to transmit audio data from the
- SoC to the audio codec. This option enables sound support using
- I2S. It calls either of the two supported codecs (no use is made
- of driver model at present).
- config I2S_ROCKCHIP
- bool "Enable I2S support for Rockchip SoCs"
- depends on I2S
- help
- Rockchip SoCs support an I2S interface for sending audio data to an
- audio codec. This option enables support for this, using one of the
- available audio codec drivers. This driver does not make use of
- DMA, but writes each word directly to the hardware.
- config I2S_SAMSUNG
- bool "Enable I2C support for Samsung SoCs"
- depends on I2S
- help
- Samsung Exynos SoCs support an I2S interface for sending audio
- data to an audio codec. This option enables support for this,
- using one of the available audio codec drivers. Enabling this
- option provides an implementation for sound_init() and
- sound_play().
- config SOUND_DA7219
- bool "Dialog Semiconductor audio codec"
- depends on SOUND
- help
- The DA7219 is an ultra-low-power audio codec with Advanced Accessory
- Detection (AAD). This driver only supports generation of ACPI tables.
- It does not support sound output or any of the other codec
- features.
- config SOUND_I8254
- bool "Intel i8254 timer / beeper"
- depends on SOUND
- help
- This enables support for a beeper that uses the i8254 timer chip.
- This can emit beeps at a fixed frequency. It is possible to control
- the length of the beeps, by turning a beep on, waiting for a period
- of time, then turning it off.
- This is quite an old feature, called PIT (Programmable Interval
- Timer), but is nonetheless still available on modern x86 machines.
- config SOUND_INTEL_HDA
- bool "Intel HDA audio codec"
- depends on SOUND
- help
- Most Intel chips have an HDA (High-definition audio) codec which can
- be used by U-Boot to play simple beeps. This is also sometimes called
- Azalia which was the development code-name. It requires setup
- information in the device tree (see intel-hda.txt).
- config SOUND_IVYBRIDGE
- bool "Intel Ivybridge sound support"
- depends on SOUND
- select SOUND_INTEL_HDA
- help
- Enable sound output on supported Intel Ivybridge-based boards. This
- driver uses Intel's High-definition Audio (HDA) architecture,
- sometimes called Azalia. The audio codec is detected using a
- semi-automatic mechanism.
- config I2S_TEGRA
- bool "Enable I2S support for Nvidia Tegra SoCs"
- depends on I2S
- select TEGRA124_DMA
- help
- Nvidia Tegra SoCs support several I2S interfaces for sending audio
- data to an audio codec. This option enables support for this,
- using one of the available audio codec drivers.
- config SOUND_MAX98088
- bool "Support Maxim max98088 audio codec"
- depends on I2S
- help
- Enable the max98088 audio codec. This is connected via I2S for
- audio data and I2C for codec control. At present it only works
- with the Samsung I2S driver.
- config SOUND_MAX98090
- bool "Support Maxim max98090 audio codec"
- depends on I2S
- help
- Enable the max98090 audio codec. This is connected via I2S for
- audio data and I2C for codec control. At present it only works
- with the Samsung I2S driver.
- config SOUND_MAX98095
- bool "Support Maxim max98095 audio codec"
- depends on I2S
- help
- Enable the max98095 audio codec. This is connected via I2S for
- audio data and I2C for codec control. At present it only works
- with the Samsung I2S driver.
- config SOUND_MAX98357A
- bool "Support Maxim max98357a audio codec"
- depends on PCI
- help
- Enable the max98357a audio codec. This is connected on PCI for
- audio data codec control. This is currently only capable of providing
- ACPI information. A full driver (with sound in U-Boot) is currently
- not available.
- config SOUND_RT5677
- bool "Support Realtek RT5677 audio codec"
- depends on SOUND
- help
- Enable the Realtek RT5677 audio codec. This is an I2S device used on
- some Chromebooks from around 2015 ('auron'). It is configured using
- an I2C interface and supports multiple sound inputs and outputs,
- including digital microphones.
- config SOUND_SANDBOX
- bool "Support sandbox emulated audio codec"
- depends on SANDBOX && SOUND
- help
- U-Boot sandbox can emulate a sound device using SDL, playing the
- sound on the host machine. This option implements the sound_init()
- and sound_play() functions for sandbox. Note that you must install
- the SDL libraries for this to work.
- config SOUND_WM8994
- bool "Support Wolfson Micro wm8994 audio codec"
- depends on I2S_SAMSUNG
- help
- Enable the wm8994 audio codec. This is connected via I2S for
- audio data and I2C for codec control. At present it only works
- with the Samsung I2S driver.
- endmenu
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