At Tue, 21 Oct 2008 10:49:16 +0100, Mark Brown wrote: > > On Tue, Oct 21, 2008 at 05:48:56PM +0800, Cai, Cliff wrote: > > >From: Takashi Iwai [mailto:tiwai@xxxxxxx] > > > >But, CONFIG_SND_MULTICHAN_SUPPORT would change any buffer > > >allocation behavior? I don't find it... > > > It will change the ac97 frame size defined in bf5xx-ac97.h,the frame > > size the basic unit of the DMA buffer > > So this is purely a restriction in the driver, rather than a property of > the hardware - is there any reason why you can't change the size of > buffer that you allocate at runtime? It'd be possible, as far as I understand. It's rather a design issue. bf5xx driver preallocates the max size buffer. Otherwise you may get no large buffer at later fragmentation. And that size is different between with and without multi-channel support. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
