i.MX6DQ UART RX FIFO Overrun

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i.MX6DQ UART RX FIFO Overrun

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satoshishimoda
Senior Contributor I

Hi community,

Our customer have a question about i.MX6DQ UART.

They faced UART RX FIFO overrun problem with the following log when data receiving from GPS on Android L5.1.1_2.1.0-ga.

=====

root@imx6qsabresd:~# cat /dev/ttymxc2

[  102.664528] imx-uart 21ec000.serial: Rx FIFO overrun

[  102.669724] imx-uart 21ec000.serial: Rx FIFO overrun

[  102.674926] imx-uart 21ec000.serial: Rx FIFO overrun

[  102.680134] imx-uart 21ec000.serial: Rx FIFO overrun

[  102.685334] imx-uart 21ec000.serial: Rx FIFO overrun

=====

And they resolved by backport UART driver from 3.18.26 similar as the solution written in iMX6Quad uart RX Fifo Overrun..

However, a new problem was occurred by this backporting.

Sometimes connection to bluetooth module will be failed with 3Mbps baud rate even though this problem was not occurred with 3.14.52 UART driver.

So they want to resolve the UART RX FIFO overrun problem without backporting.

Do you have any idea to modify the L3.14.52 UART driver?

Best Regards,

Satoshi Shimoda

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Satoshi

nxp has service which helps customers to port drivers :

http://www.nxp.com/support/nxp-professional-services:PROFESSIONAL-SERVICE

Pro-Support contract www.nxp.com/prosupport

I am sorry for the inconvenience.

Best regards

igor

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Satoshi

nxp has service which helps customers to port drivers :

http://www.nxp.com/support/nxp-professional-services:PROFESSIONAL-SERVICE

Pro-Support contract www.nxp.com/prosupport

I am sorry for the inconvenience.

Best regards

igor

-----------------------------------------------------------------------------------------------------------------------

Note: If this post answers your question, please click the Correct Answer button. Thank you!

-----------------------------------------------------------------------------------------------------------------------

View solution in original post

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