How can I assign the pins to 10bit VGA data with my Cyclone V which have only 8bit VGA format??

Hi, I'm studying for my project on FPGA.

I want to use OV7670 and I found some sources already made.

It makes 422 YCbCr to 444 YCbCr, and then RGB.

But here's the problem.

It made 10-bits RGB data for VGA controll, but my Cyclone V De1-SoC only have 8-bits VGA pins, so I can't assign last 2 bits to pins.

Is it okay that do not assign the last 2 pins? or are there any pins to assign them?

I can't find YUV to 8-bits RGB in google, plz let me know how to solve the problem.

Thx