On Sat, Oct 07, 2017 at 10:36:55PM +0000, Levin, Alexander (Sasha Levin) wrote: > From: Matt Ranostay <matt@ranostay.consulting> > > [ Upstream commit 9834ffd1ecc3a401d0ce64c2d4235a726da6d4f9 ] > > We can get audio errors if hitting deeper idle states on omaps: > > [alsa.c:230] error: Fatal problem with alsa output, error -5. > [audio.c:614] error: Error in writing audio (Input/output error?)! > > This seems to happen with off mode idle enabled as power for the > whole SoC may get cut off between filling the McBSP fifo using DMA. > While active DMA blocks deeper idle states in hardware, McBSP > activity does not seem to do so. This seems rather invasive and fancy for stable material - people might want it in production but they may also not have enough power management enabled to be seeing the problems it fixes.
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