The deco x20 v4 is 1Ghz Dual core Qualcomm IPQ5018 chip. This seems to be chip thats now common for almost all latest versions of Decos. Also the Deco x20 seems to have a recovery page where you can upload a firmware. Could be interesting if anyone is interested as the chip is quite powerful with 2 A53 cores.
Yep. The latest is v4 and v4.6 the original ones (v1) were quad core A53 chips while the latest ones are dual core A53 chips most likely because of chip issues. The Broadcom is bcm6755 I think which is the same one in x20-4g. I had the x20-4G and x20 v4 and the Qualcomm chip x20 was much better at Wi-Fi than Broadcom and in general too at routing probably because of the NPU.
I want openwrt support for the TP-LINK DECO X20 v1.20/v1.2; it's definitely qualcomm, and it even has its GPL source code released on its website, and maybe because it has same SOC architecture, for some reason it may also be possible to port Openwrt for the DECO X60
As I am 16 years old, I don't have much knowledge about building OpenWRT for this device; I don't have a serial reader, and I can't mess up with the internal parts. The best I can do is do everything possible from the outside; I know the usage of git, know Linux, and have used OpenWRT on my XiaoQiang 1200AC. But I guess it's worth it for doing research on the X20 v1.20 (specifically just 1.20; no confusion, it's using the QCA chipset).