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iMX6Quad uart RX Fifo Overrun

Question asked by Salvatore Campagna on Dec 16, 2015
Latest reply on Aug 31, 2016 by Fabio Estevam

Hi,

 

I'm using a custom made board with an iMX6Quad.

The Linux kernel version used is 3.14.28 and I see the following errors in dmesg:

 

[   58.250641] imx-uart 21ec000.serial: Rx FIFO overrun

[   59.241089] imx-uart 21ec000.serial: Rx FIFO overrun

[   59.246135] imx-uart 21ec000.serial: Rx FIFO overrun

[   59.251183] imx-uart 21ec000.serial: Rx FIFO overrun

[   60.241088] imx-uart 21ec000.serial: Rx FIFO overrun

[   60.246141] imx-uart 21ec000.serial: Rx FIFO overrun

[   60.251184] imx-uart 21ec000.serial: Rx FIFO overrun

 

The problem is not systematic.

 

I need some help to understand the source of the problem.

Any idea about the reason and why it is not systematic?

 

Thank you.

 

Salvatore

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