Audio Chip Bringup

Goal

• Given that I2C works with the Yocto kernel (see Yocto Kernel Bringup on Customer Hardware), make I2S communication work.

Findings

• Check Intel application notes

• Configure driver. Devicetree?

  • Connect chip to I2S signals (AUDIO_MCK, I2S0_CK, I2S0_LRCK, I2S0_SDOUT). Where to find I2S implementation in kernel?

• Configure userspace? Which ALSA (?) device?

Further Information

• Datasheet TLV320DAC3203IRGER

• Datasheet TLV320DAC3203

• Linux Driver

  • “TLV320DAC3203: Drive Code for TLV320DAC3203IRGER”, suggesting that TLV320AIC32x4 is compatible with TLV320DAC3203. Driver is tlv320aic32x4.c.

  • “TLV320AIC31XXSW-LINUX (Linux Driver for TLV320AIC31XX)”, suggesting that tlv320aic31xx.c is responsible for the device.