On Thu, Apr 23, 2009 at 02:52:24PM +0300, Peter Ujfalusi wrote: > I have a theory, which needs to be checked for the startup switch in OMAP: > I think what is happening, that the McBSP module got enabled earlier then the > DMA is started. This leads to and underrun situation in McBSP (no data in the > buffer), so McBSP will transmit _something_ when the start condition for the > I2S is met. When the DMA starting to push data to McBSP, than valid data will > be shifted out. > McBSP is shifting word by word manner. So if the first word transmit need to > be done, when the buffer is empty, it starts to shift the word, than the data > arrives from the DMA, the next word will be valid data -> you will have a > nice channel switch. > Is this makes sense? Sounds entirely plausible to me. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
