On Fri, 3 Feb 2012 20:56:07 -0700 (MST) Paul Walmsley <paul@xxxxxxxxx> wrote: > On Sat, 4 Feb 2012, NeilBrown wrote: > > > I have to set autosuspend_delay_ms for omap_uart.3 as well before the > > behaviour is significant. > > But then I see no output corruption. Lots of input corruption of course but > > the output looks fine. > > OK. Is the input corruption at the beginning of the pasted buffer, or the > middle? And this is with CPUIdle enabled? > > With CPUIdle disabled here, what I thought was output corruption occurs in > the middle of the pasted buffer occasionally. But it might be input > corruption, if the CPU manages to empty the RX FIFO while the TX FIFO is > empty. > > > - Paul Yes, cpu-idle is enabled. I think corruption is mostly early, though it isn't very consistent. e.g. # C!jHhzys/Y?omap/omap_uart.2/power/autosuspend_delay_ms -bash: !jHhzys/Y?omap/omap_uart.2/power/autosuspend_delay_ms: event not found # echo 0 > /sys/devices/platFK/////mpWWt.]au%e_mHHHhQ 5 -bash: /sys/devices/platFK/////mpWWt.]au%e_mHHHhQ: No such file or directory NeilBrown
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