[alsa-devel] [PATCH] ALSA au88x0: Fix IRQ fifo error and channels swap of 4 channels playback
superquad.vortex2 at gmail.com
Mon Jan 9 10:38:05 CET 2012
2012/1/9, Manuel Jander <manuel.jander at gmail.com>:
> I can't remember why "pause fifo" is being called instead of "stop
> fifo". If using the latter fixes channel swap, then I would guess that
> the "stop" operation ensures that the DMA starts at an appropriate
> aligned address, thus avoiding shifted data when the interleaved
> channel get multiplexed to the AC97 codec. But that is just a wild
> Best Regards, and thanks a lot, all of you.
Once, channel swap does not occur for the four channels playback.
Another patch for au88x0
- add PCM Playback Volume for subdevices using internal hardware mixer of au88x0
- Reduce the number of subdevices from 32 to 16 since number of audio
streams also depend of the number of sample rate converters NR_SRC
and the number of DMA
You can test it with alsa-tools/hwmixvolume
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