On Fri, 2007-11-09 at 12:37 +0100, Friedrich Lobenstock wrote: > Hello! > > The background: I'm just designing an ATMEL AT91RM9200 based board which > got two TLV320AIC33 on board. It is either possible > to hook up the two TLV320AIC33 to a separate SSC (synchronous serial > control) channel each or use one SSC channel and configure it for TDM (time > division multiplex) mode. There is already a driver for > TLV320AIC14k/TLV320AIC2k in the development tree, so adding support for the > TLV320AIC33 should be feasible. > Fwiw, TDM will save you a SSC port but will make similtanious use of both codecs at different rates/formats difficult. It depends on your use cases. > What I'm not sure about is the fact if ASOC is prepared for using channels, > especially SSC, in TDM mode. Is the core ASOC structure prepared to handle > that? It is for some platforms, but I think AT91 SSC and your codec will need set_tdm_slot() implemented. Your machine driver will call set_tdm_slot to configure codec/SSC slots. > > Would we be better off instantiate one drive twice each time with different > parameters for the SSC channel? > I would instantiate one driver with 3 pcms. This would allow:- pcm0: 2 channel, slot 0,1 pcm1: 2 channel, slot 2,3 pcm2: 4 channel, slot 0,1,2,3 Giving full flexibility for many use cases. The pcms would be mutually exclusive (enforced by machine driver). HTH Liam _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
