Hello.
Tom Wheeler wrote:
What is the status of DaVinci DM6443 USB using cppi DMA? I read a
while back that there were problems using DMA mode and in particular
when copying files between two USB devices. I have verified that this
does fail in 2.6.28-rc8 and later. The problem does not seem to be
isolated to this test as I have also seen failures when attempting to
write files from nand flash to a USB thumb drive. I do not see these
failures when in PIO mode. I have also tested earlier kernels, like
2.6.10 and 2.6.18, from MontaVista and verified that DMA mode works
properly.
I am wondering if these are known issues and if so what is the exact
source of the problem?
Yes, most probably these issues have been already addressed by the
patches I posted, you'll just have to wait till 2.6.30-rc1 since it was
decided that the fixes should wait (they needed some verification on
OMAP too).
Thanks.
Not at all. :-)
WBR, Sergei
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