1. Article purpose[edit source]
The purpose of this article is to:
- list the audio codec hardware components that might be integrated in the different STM32MPU boards
- link these components to the corresponding software framework(s)
- point to the datasheet(s) of these components
- explain, when necessary, how to configure these components.
2. Software frameworks[edit source]
| Domain | Peripheral | Software frameworks | Comment | ||
|---|---|---|---|---|---|
| Cortex-A7 secure (OP-TEE) |
Cortex-A7 non-secure (Linux) |
Cortex-M4 (STM32Cube) | |||
| Audio | Wolfson wm8994 | ALSA framework | DAC & ADC audio codec | ||
| Audio | Cirrus cs42l51 | ALSA framework | DAC & ADC audio codec | ||
| Audio | Silab sil9022 | ALSA framework | HDMI transmitter | ||
| Audio | ST MP34DT01-M | ALSA framework | Digital microphone | ||
3. Wolfson wm8994[edit source]
The WM8994 is a highly integrated ultra-low power hi-fi CODEC rich in multimedia features.
For details and the datasheet please contact the WM8994 codec provider.
3.1. Linux driver[edit source]
Bindings: Documentation/devicetree/bindings/sound/wm8994.txt
Sources:
4. Cirrus cs42l51[edit source]
The CS42L51 is a highly integrated, 24-bit, low-power stereo CODEC.
For details and the datasheet please contact the CS42L51 codec provider.
4.1. Linux driver[edit source]
Bindings: Documentation/devicetree/bindings/sound/cs42l51.txt
Sources: sound/soc/codecs/cs42l51.c
5. Silab sil9022[edit source]
The SiI9022A HDMI transmitter supports the HDMI® Specification on a wide range of mobile products.
For details and the datasheet please contact the SiI9022A HDMI transmitter provider.
5.1. Linux driver[edit source]
Bindings: Documentation/devicetree/bindings/display/bridge/sii902x.txt
Sources: drivers/gpu/drm/bridge/sii902x.c
6. ST MP34DT01-M[edit source]
The MP34DT01-M is an ultra-compact, low-power, omnidirectional, digital MEMS microphone.
Datasheet: https://www.st.com/resource/en/datasheet/mp34dt01-m.pdf
6.1. Linux driver[edit source]
Bindings: Documentation/devicetree/bindings/sound/dmic.txt
Sources: sound/soc/codecs/dmic.c