On Thu, Mar 5, 2009 at 1:55 PM, Daniel Mack <daniel@xxxxxxxx> wrote: > On Thu, Mar 05, 2009 at 12:03:35PM +0000, Mark Brown wrote: >> > > The other option would be to use the TDM mode interface to set this up >> > > since that's roughly what it is; my main concern here is that we already >> > > have two ways of doing this and I'd like to try to keep the number down >> > > for consistency. >> >> > Probably a matter of taste, but IMO TDM mode is not the place either. >> > Userspace could decide sending out 24bit samples out of a sudden (which >> > the CPU DAI might accept) and in this case, you'd need some special >> > logic in the board file again to set up deviders, time slots etc, right? >> >> That's why the clocking interface is generally used here - it's more >> orthogonal. > > Hmm, how would you express 24 sample bits with 32 clocks per channel? I > might not have gotten your point yet - could you provide an example? I'm still a bit confused by the alsa formats and how they interact with the SSP formats. Do I understand correctly that S24_3LE (24-bit packed in 3 bytes) can't be supported due to limitations in (at least PXA27x's) DMA engine? So the remaining 24-bit formats are S24_LE and S32_LE anyway, both of which are 24-bit packed in 32 bits (either LSB or MSB aligned). regards Philipp _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
