Hello, If I use "SNDRV_DMA_TYPE_CONTINUOUS" as a parameter to pre-allocate function to get contiguous locations of memory and use the function snd_dma_continuous_data() would that be correct setting for my case? Where are the parameters of dma_addr and dma_area written to the runtime structure? Regards; Aadish On Thu, Jun 24, 2010 at 12:45 PM, Takashi Iwai <tiwai@xxxxxxx> wrote: > At Thu, 24 Jun 2010 12:38:35 +0530, > Adish Kuvelker wrote: >> >> Hello Takashi, >> >> I am developing a DMA Controller driver to service the PCM out data to >> the Audio controller on the arm-based ATLASIII procesor. In case you >> need any more information on the architecture I can pass. >> >> Since the DMA isn't on PCI bus I am pre-allocation continuous memero >> using the "snd_pcm_lib_preallocate_pages_for_all" passing >> SNDDRV_DMA_TYPE_DEV and "snd_dma_continuous_data" as appropriate >> parameters. > > snd_dma_continuous_data() is only for SNDRV_DMA_TYPE_CONTINUOUS. > In this case, the pages aren't for DMA. > > For SNDRV_DMA_TYPE_DEV, simply pass the device pointer you use. > > > Takashi > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
