i.MX8M nano: Low latency audio vs. eMMC

cancel
Showing results for 
Search instead for 
Did you mean: 

i.MX8M nano: Low latency audio vs. eMMC

78 Views
swendt38
Contributor II

Hi,

we have a system based on iMX8M Nano which first used QSPI NOR flash as NV memory but due to higher required capacity we had to change to eMMC (conncted to uSDHC3).

On having activity on eMMC we can hear short audio interruptions (gaps).

We have to use 256 period size for alsa IO in order to fulfill low latency requirements.

Is there any way we can change interrupt priority or DMA priority so SAI gains higher priority than eMMC ?

We use Kernel 5.4.

Labels (1)
0 Kudos
2 Replies

63 Views
b45499
NXP TechSupport
NXP TechSupport

How about work with QSPI NOR flash before?

0 Kudos

54 Views
swendt38
Contributor II

With QSPI Flash it worked much better.

It seems eMMC driver locks interrupts for too long.

0 Kudos