[alsa-devel] [PATCH] ALSA: Support Media Vision Jazz16 chips

Rene Herman rene.herman at gmail.com
Wed Apr 11 22:39:42 CEST 2007

On 04/11/2007 10:00 PM, Rask Ingemann Lambertsen wrote:

> The root cause is that snd_sbdsp_create() only supports dma16 set to
> 5, 6 or 7. Any other value is changed to -1, which is what happens in
> this case. It is a hack to avoid trouble with recent SoundBlaster 16
> cards (Vibra16VX)

Well, let's call them "relatively" recent... :-)

> using two 8-bit DMA channels, which the SB16 doesn't support.
> Fix: Use only dma8.

Is it perhaps possible to cheese around it using

	"if (hardware ==  SB_HW_JAZZ16)"

type constructs (and maybe some "if (dma > 3)" elsewhere if needed)? If 
this would be a small change, maybe's it's worth it. And maybe not.

I'm at the moment playing with a few different cards due to them having 
a mitsumi CD-ROM controller and me just having dug up a mitsumi CD-ROM 
but I'll wait for a next complete iteration of the jazz16 patch and then 
give it a once-over and some testing again (feel free to ask for specifc 
tests as well).

Then after that you/we should seriously start poking Belay...


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