On Mon, 2009-03-09 at 15:47 +0100, pHilipp Zabel wrote: > Ok, > > I'm not sure how to handle this correctly. > > Magician needs stereo S16_LE input data from alsa, DAIFMT_DSP_A on the > wire with a frame size of 16 bit (one frame for each channel) and thus > 2-byte DMA transfers to the FIFO (currently called 'mono' DMA params). > Zylonite's current code uses 32 bit frame size and 4-byte DMA > transfers to emulate I2S (S16_LE,stereo). Network mode seems to work, > so it could be changed to use two 16 bit slots instead with 2-byte DMA > transfers (which would make Magician happy). But... > Daniel's board needs very strange settings because network mode > doesn't work, so I guess he can't use 2-byte DMA transfers. Is that > correct? > > If we can't find a way to have all machines use the mono DMA params, > there has to be some kind of interface to set the width of the data in > the FIFO independently from the Alsa format. How should that interface > look like? Btw, what pxa processor variants are you and Daniel using ? Iirc, PXA3x SSP is quite different in terms of "usability" compared to to PXA2x SSP. It might be worth diverging the SSP code a little here if your CPUs are different. Liam _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
