BPI-R4，how to get in mtk factory test mode

Banana Pi Router design BPI-R4(MT7988)
1

How to get in factory test mode? input: mwctl phy0 e2p 1af =1 result: 0x0000
The commond ‘mwctl phy0 e2p 1af =1’，should return 0x0001

2

you need install MTK vendor wifi driver image, you may contact the mtk vendor and get the document about ate and QAtools commnad. then you can debug the wifi.