10 May
2016
10 May
'16
7:34 p.m.
On Tue, May 3, 2016 at 5:24 AM, Fabio Estevam festevam@gmail.com wrote:
On Tue, May 3, 2016 at 9:13 AM, Arnaud Mouiche arnaud.mouiche@invoxia.com wrote:
If the capture is already running while playback is started, it is highly probable (>80% in a 8 channels scenario) that samples are lost between the DMA and TX fifo.
The reason is that SIER.TDMAE is set before STCR.TFEN0, leaving a time window where the FIFO doesn't receive the samples written by the DMA.
This particular case happened only if capture is already enabled as SCR.SSIEN is already set at the playback startup instant.
Signed-off-by: Arnaud Mouiche arnaud.mouiche@invoxia.com
Reviewed-by: Fabio Estevam fabio.estevam@nxp.com
Tested-by: Caleb Crome caleb@crome.org