On Thu, Jun 26, 2025 at 10:09 AM Arun Raghavan arun@arunraghavan.net wrote:
From: Arun Raghavan arun@asymptotic.io
On an imx8mm platform with an external clock provider, when running the receiver (arecord) and triggering an xrun with xrun_injection, we see a channel swap/offset. This happens sometimes when running only the receiver, but occurs reliably if a transmitter (aplay) is also concurrently running.
It seems that the SAI loses track of frame sync during the trigger stop -> trigger start cycle that occurs during an xrun. Doing just a FIFO reset in this case does not suffice, and only a software reset seems to get it back on track.
This looks like the same h/w bug that is already handled for the producer case, so we now do the reset unconditionally on config disable.
Signed-off-by: Arun Raghavan arun@asymptotic.io Reported-by: Pieterjan Camerlynck p.camerlynck@televic.com Fixes: 3e3f8bd56955 ("ASoC: fsl_sai: fix no frame clk in master mode") Cc: stable@vger.kernel.org
Reviewed-by: Fabio Estevam festevam@gmail.com