I have bought this router recently. DIR-1260 AC1200 MU-MIMO Wi-Fi Gigabit Router | D-Link (dlink.com)
I am not able to identify which processor is there in this router. I have some technical information form the data sheet. https://in.dlink.com/-/media/global-pdfs/global-datasheets/dir/dir1260a1datasheetv100ww.pdf
880Mhz Dual Core Processor (Looks like to be MTK)
128MB Flash Memory.
Same specs are common for many D-Link Routers. I wonder if OpenWRT support can come to this router.