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TDA4VE-Q1: About image conversion in vision_apps/kernels/img_proc/c66

Part Number: TDA4VE-Q1

In ti-processor-sdk-rtos-j721s2-evm-08_06_01_03/vision_apps/kernels/img_proc/c66, compile using file vx_image_preprocessing_target_no_dma.c, but in ti-processor-sdk-rtos-j721e-evm-07_03_00_07/vision_apps/kernels/img_proc/c66,  compile using file vx_image_preprocessing_target.c.

Why is this happening? Is it because not using DMA is more efficient? Or is it because the image conversion function cannot use DMA? 

Looking forward to your reply.