El 03/02/15 a las 17:18, Emilio López escibió:
Hi,
El 03/02/15 a las 16:39, jonsmirl@xxxxxxxxx escibió:
Did you fix multiple simultaneous DMA transfers in this? And easy test
is to start jack audio. Jack will start simultaneous cyclic transfers
on both the ALSA input and output. Since cyclic transfers never end,
multiple simultaneous transfers has to work. Last time I tried it I
got an immediate GPF when the second cyclic transfer was started.
I didn't get a chance to test with jack yet, but I don't see any reason
why two cyclic transfers wouldn't work, assuming they're on different
vchans.
Were you by any chance booting off of NAND by the way? That caused a GPF
because the bootloader left the hardware in a dirty state, but it should
be fixed now.
A quick followup on this; I tried jack and found a bug on the way
channels are terminated, it turns out sometimes IRQs can still trigger
after the termination. Once I fixed that, I was able to get jack to
produce a deafening tone with the following:
# jackd -dalsa --playback &
# jackdmp 1.9.10
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2014 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
JACK server starting in realtime mode with priority 10
self-connect-mode is "Don't restrict self connect requests"
creating alsa driver ... hw:0|-|1024|2|48000|0|0|nomon|swmeter|-|32bit
configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods
ALSA: final selected sample format for playback: 32bit integer little-endian
ALSA: use 2 periods for playback
# jack_simple_client
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