.debian multi-arch dsc file

HI, how is it possible to handle kmp for debian with ONE dsc file ?? e.g. I build a webcam driver for opensuse by using the spec file I provide through obs. then packages names are not including the arch name in the .spec, unlike debian mypackage.dsc.

i cannot add the amd64, cause the build will fail on both archs.

Build-Depends: debhelper (>= 5), locales-all, linux-headers-2.6.26-1-686, module-init-tools

Is that possible to use two dsc for the same package in obs ? How would I name them sperately ?

I can only build the package for ONE 686 arch on debian, while it’d be nice to produce a second pack for amd64.
so I could create a second package independently from the other but it’d be like duplicating everything.