Hi, this is kinda not related to DRI at all, just simply linux driver dev, but I was directed here for my question, so I'll try anyways.
I'm trying to write a driver for an arm64 SoC that uses `dma_alloc_coherent` to allocate a buffer that both the CPU and other hw in the SoC reads/writes to/from but it seems like there's a caching problem with it.
I'm reading from it directly after the hw in SoC writes to it and the driver gets notified and it just seems like the data that the hw has written to that memory is not there, unless I manually flush the D-cache using `dcache_clean_inval_poc`
Any suggestions on what am I doing wrong? Isn't `dma_allloc_coherent` supposed to be uncached? What should I use instead?