On Tue, May 15, 2018 at 1:45 PM, John B <[email protected]> wrote: > Hi Robert, > > I am currently using the uboot_overlay_addrX scheme, and it seems the driver > is always using PIO even for large SPI transfers (between 1024 and 3072 > bytes). Under 3.8.13 I was using the Kernel overlay mechanism with success > (DMA worked), but this past week I just switched to the more recent stuff > that no longer supports the cape manager "slots" file, meaning, all overlays > are in the uEnv.txt (or part of the main DTB). I'd rather not monkey with > the main DTB, however, if that's the only way to get SPI+DMA then I guess > I'll have to do that. Do I need a newer kernel and/or u-boot? version.sh > output attached.
No you are seeing a different issue.. The DMA/SPI/Overlays would cause a "hardlock" when trying to switch from pio mode to DMA. In your case, your just seeing an un-optimized dma.. Any change with v4.14.x? Regards, -- Robert Nelson https://rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAOCHtYj5TV%3D%2BOHKhXDWHoshGoWY-QN2fQhWupWOF%3DL%2BS294wog%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
