Difficulty of Running mmdetection2.x (for bevformer) on Blackwell Architecture GPU RTX5070, Request for Update & solution.

Hello, can someone help me how can I setup BEVformer on RTX5070 since the device only support Pytorch >=2.7.1 / sm120 kernel CUDA12.8?

However, I tried to install BEVformer on the thsi RTX5070 device, but can't work with the torch version of BEVformer. Although I tried with torch2.7.1 and upgrading mmdet3d, mmcv, mmseg, the code base of BEVformer, as well as mmdet3d model builder doesn't support in mmdet3d>1.1.0.

So, is there anyone has already tried for this incompatibility issue of running BEVformer on RTX5070 device? Please, can anyone provide for using BEVFormer on high Blackwell architecture GPU?

Thanks.