Hi Jim, On Tue, 2020-07-07 at 17:08 -0500, Jeremy Linton wrote: > Hi, > > I spun this up on my 8G model using the PFTF firmware from: > > https://github.com/pftf/RPi4/releases > > Which allows me to switch between ACPI/DT on the machine. In DT mode it > works fine now,
Nice, would that count as a Tested-by from you? > but with ACPI I continue to have failures unless I > disable CMA via cma=0 on the kernel command line. Yes, I see why, in atomic_pool_expand() memory is allocated from CMA without checking its correctness. That calls for a separate fix. I'll try to think of something. > It think that is because > > using DT: > > [ 0.000000] Reserved memory: created CMA memory pool at > 0x0000000037400000, size 64 MiB > > > using ACPI: > [ 0.000000] cma: Reserved 64 MiB at 0x00000000f8000000 > > Which is AFAIK because the default arm64 CMA allocation is just below > the arm64_dma32_phys_limit. As I'm sure you know, we fix the CMA address trough DT, isn't that possible trough ACPI? Regards, Nicolas
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