-------- Original-Nachricht -------- > Datum: Tue, 06 May 2008 18:48:39 +1000 > Von: Benjamin Herrenschmidt <[EMAIL PROTECTED]> > An: Gerhard Pircher <[EMAIL PROTECTED]> > CC: linuxppc-dev@ozlabs.org, Takashi Iwai <[EMAIL PROTECTED]>, [EMAIL > PROTECTED], [EMAIL PROTECTED] > Betreff: Re: [PATCH] Sam440ep support
> > On Tue, 2008-05-06 at 09:51 +0200, Gerhard Pircher wrote: > > Takashi Iwai posted a preliminary patch a long time ago. I tested it > > on my machine and it failed with non coherent scatter-gather DMA > > allocations (I guess almost all ALSA PCI drivers use SG DMA?). > > How does Alsa allocate such SG ? I can't answer this question. *ducked* :-) Takashi? FYI: I posted the results of the test with Takashi's dma_mmap_coherent patch here: http://ozlabs.org/pipermail/linuxppc-dev/2006-June/024078.html On the other side it looks like this problem does not only affect ALSA. As far as I can tell also some V4L(2) drivers have a problem with mmaping non coherent DMA allocations, but I'm not sure (it's a long time since I did some tests with video cards on my AmigaOne). Naturally I can do some tests, if you or Takashi come up with a new patch. Thanks! Gerhard -- GMX startet ShortView.de. Hier findest Du Leute mit Deinen Interessen! Jetzt dabei sein: http://www.shortview.de/[EMAIL PROTECTED] _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
