The modem audio is not sent over i2s with the SIMCom SIM7100, it is going over a USB connection as raw PCM and is managed by haegtesse. https://source.puri.sm/Librem5/haegtesse
That's why the support channels were setup. Also, there still isn't a lot of details to share in the first place. The problem comes down to sending the initalization codes to the panel, which for some reason is not…
The modem audio is not sent over i2s with the SIMCom SIM7100, it is going over a USB connection as raw PCM and is managed by haegtesse. https://source.puri.sm/Librem5/haegtesse
That's why the support channels were setup. Also, there still isn't a lot of details to share in the first place. The problem comes down to sending the initalization codes to the panel, which for some reason is not…