Microphone not detecting in Asus Rog Strix G531GT-BQ002T Laptop

I’ve been using Asus ROG Strix G with Manjaro. My laptop has only one jack port for headphones (not two ports).

When I connect my earphones, I can listen to music, but can’t access the microphone.

[stark@stark ~]$ pacmd list-sources | grep mic
                analog-input-mic: Microphone (priority 8700, latency offset 0 usec, available: unknown)
                                device.icon_name = "audio-input-microphone"
        active port: <analog-input-mic>

Is there any solution?