Not booting with debian 0.7.7 image

[Bluetexon]

Hello,
since I'd like to use the wifi module via sdio, I wanted to boot the 0.7.7 debian image.
That doesn't work and I only get the following messages on boot:

Code:

cdn-dp fec00000.dp: Direct firmware load for rockchip/dptx.bin failed with error -2

And after some of these messages it stucks with this last message:

Code:

cdn-dp fec00000.dp: [drm:cdn_dp_request_firmware] *ERROR* Timed out trying to load firmware

I've tried some other debian images before (0.7.8, 0.7.11) and it displayed the exact same messages there, but it booted alright.

Is there some way to fix it?

Thanks,
Bluetexon