Splitting PCIe 4x to 4x PCIe 1x

Chip Platform Rockchip
1

Hi,
i want to Connect 4 PCIe 1x devices to the RK3399 PCIe 4x Bus. I Studied the TRM for the RK3399 but did not get any wiser. Maybe someone can answer my question.
As i See it there are two ways to do this:
A) use a PCIe switch
B) use any Kind of bi(quad)fucation of the 4x link
please see the picture for a explaination what I’m up to

thanks in advance

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