[v1,0/2] NVIDIA Tegra serial driver improvements

Message ID 20200112180919.5194-1-digetx@gmail.com
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  • NVIDIA Tegra serial driver improvements
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Dmitry Osipenko Jan. 12, 2020, 6:09 p.m.

This series is a complement to [1], which changed APB DMA driver's runtime
PM to make DMA clock enabled only during of actual transfer activity.
Unfortunately turned out that it wasn't enough because serial driver keeps
RX DMA active all the time in practice and that's what the first patch of
this series addresses. Secondly, I noticed that DMA synchronization could
be improved, it is also addressed now. Please review and apply, thanks in

Dmitry Osipenko (2):
  tty: serial: tegra: Activate RX DMA transfer by request
  tty: serial: tegra: Optimize DMA buffer synchronization

 drivers/tty/serial/serial-tegra.c | 94 ++++++++++++++++++-------------
 1 file changed, 55 insertions(+), 39 deletions(-)