Seeed Studio LinkStar H28K

[frollic]

Openwrt for rk3528

There are no tv boxes supported by openwrt. If you want support you will need to do the porting yourself, as you have the device in hand. Couldn't help myself and checked the linux support - currently there isn't any - SOC is too new. However, this is supposedly a minor upgrade to the rk3328 which does have mainline support. So if you ported openwrt using the rk3328 device trees you could find that it works on your device as well.