Fishwaldo commented on PR #20063:
URL: https://github.com/apache/nuttx/pull/20063#issuecomment-5571842661

   Rebased. 
   
   The non-coherent cache on EiC7700x and lack of Zicbom makes DMA a pain on 
Linux. There have been a few proposals that would work around it but non have 
landed yet. PR #20064 helps here on NuttX. Next couple of PR's I'll open around 
MSHC and Ethernet depend on that, and I have HDMI working as well but it gets 
artifacts that I've not yet nailed down.  


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