In our BSP the code it is ready for Basler Cameras, but the MIPI CSI interface it is ready for any camera like this AR0521, you need to contact On Semi in order to get the driver. From our interface it is already supported and you can add the driver that you can get from the Camera Manufacturer.
we sent a request to ONs, they replied that they do not have drivers and they do not develop them. They said that it is necessary to contact the processor developers.
Basler cameras use AR0521 sensor
How do we get the driver for the AR0521 so that we can work directly without using the basler?
Then you can download the driver from our BSP, the code it is located, in code Aurora. But you can get it directly from NXP.com
There seems to be other option for ar0521 here : https://github.com/TechNexion/linux-tn-imx/tree/tn-imx_5.4.70_2.3.0-stable/drivers/media/i2c/tevi-ar...
But you can develop the ISP-based drivers yourselves. I did it for Onsemi AR0234 (and also for Sony IMX290/IMX296/IMX327) and it would be straight-forward for AR0521 or AR0821.