On Tue, 26 Oct 2010, Manu Abraham wrote: > Hi, > > I have been wondering how to interface a Scatter Gather region as a DMA > buffer for an Audio Grabbing device. > The device is a NOC type device, similar to a SOC, the audio grabber is a > part of it, for realizing the audio > capabilities on the device. > > The hardware DMA is mostly a Scatter Gather based engine, and it can be > described thus, briefly. Use snd_pcm_lib_preallocate_pages_for_all() - type SNDRV_DMA_TYPE_DEV_SG and snd_pcm_sgbuf_* routines. Check hda_intel.c source for more details. Jaroslav ----- Jaroslav Kysela <perex@xxxxxxxx> Linux Kernel Sound Maintainer ALSA Project, Red Hat, Inc. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
