Try the OpenWRT TF card route. Boot into OpenWRT running on the TF card and then you should have access to the eMMC from there. You should be able to bypass the RockChipDevTools nonsense.
Try the OpenWRT TF card route. Boot into OpenWRT running on the TF card and then you should have access to the eMMC from there. You should be able to bypass the RockChipDevTools nonsense.