Re: [Linphone-developers] MediaStreamer/Alsa misconfiguration on an Imx6 based product

[Ерохин Андрей]

Hello sir!

 

I was working with linphone on iMX6 using kernel 3.0.35, codec was aic32. This is probably not 1to1 your case, but just in case:

 

Sometimes IRQ latency in that kernel was about 200ms which caused mediastreamer to reset aic32 time after time. Do you see messages like following in linphone output?

*** alsa_can_read fixup, trying to recover

It may be caused by IRQ latency. There's not much ways to workaround this in mediastreamer. Try using low sampleraterate codecs or increasing ALSA_PERIOD_SIZE even more. Or do it on system level if you have root access: change CPU affinity of linphone and sDMA IRQ (in case when your I2S driver uses sDMA), move them away from CPU0.