On Thu, Oct 25, 2018 at 04:48:24PM +0300, Peter Ujfalusi wrote: > For samples sizes of 20/24/32 bit the DRR2/DXR2 registers must be used to > receive or transmit the most significant part of the 32bit sample. > We can not trick the system by using the DRR2/DXR2 register offset and use > 32bit element size since these (and other McBSP) registers are 16bit ones. > > We would need support for port_window in cyclic mode from the sDMA driver, > but it is not straight forward as we would need to have the sDMA frame to > cover the 32bit (DRR2+DRR1/DXR2+DXR1), but the frames must cover the ALSA > period to be able to receive periodic interrupts. > > Since the 32bit samples are not working (DMA timeout), just remove it in > case we have McBSP with reg_size of 2. > > Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx> > --- > Hi, > > I have noticed that on Nokia n810 32bit samples just don't work at all for audio > > Regards, > Peter > > sound/soc/omap/omap-mcbsp.c | 5 +++++ > 1 file changed, 5 insertions(+) > I guess this same holds for OMAP1 too as it has 16-bit McBSP registers too. Acked-by: Jarkko Nikula <jarkko.nikula@xxxxxxxxxx> _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
