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@ti.com
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@bitmer.com