At Thu, 8 Feb 2007 09:27:51 +0100, Micha Nelissen wrote: > > Takashi Iwai wrote: > > At Wed, 7 Feb 2007 09:31:50 +0100, > > Micha Nelissen wrote: > >> > >> The CPU architecture is armeb. > > > > OK then you'd need dma_mmap_coherent() for mmapping the data. > > Hmm? I'm not mmapping anything into user space, I suppose ALSA does this > ? > In the driver, I access the buffer using the runtime->dma_area field. On ARM, you cannot mmap and access concurrently with the normal allocated pages because of coherency. Instead, you have to allocate pages via dma_alloc_coherent() and mmap them via dma_mmap_coherent() (invoked from mmap PCM ops). Take a look at alsa-kernel/arm/devdma.* for example. Takashi ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
