DMA2D doesn't support 8-bit output, what is the best workround?

[PMath.4]

As per the question. I'm using L8 as the main display LTDC mode for memory reasons but DMA2D only supports this as an input. What is the best workround? Ordinary DMA hits the 64k limit so becomes clunky to use

Thanks

[waclawek.jan]

Pretend it's RGB565. Granularity/alignment limitations will apply, so you may need to manually transfer the odd pixels.

JW