AnsweredAssumed Answered

About Bluetooth(BT) connection in i.MX6DQ.

Question asked by Keita Nagashima on Dec 27, 2015
Latest reply on Jan 27, 2016 by Keita Nagashima
Branched to a new discussion

Dear Sir or Madam,

 

Hello. I have a question about Bluetooth(BT) connection in i.MX6DQ.

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[Overview]

- Phenomenon 1:

   When repeating Bluetooth connection & disconnection, i.MX6 isn't possible to connect BT.

- Phenomenon 2:

   When reconstructing Bluetooth continuously, a connection is disconnected within about 30 minutes.

- Frequency of Occurrence: Random

 

[Analysis Result]

- Both phenomenon displayed the log "Bluetooth: Frame Reassembly Failed"

- The problem occurred in L3.14.28. (din't occur in L3.10.53.)

  There is a lot of difference between Linux3.10 and Linux3.14. (/drivers/tty/serial/imx.c)

- The problem doesn't occur when disabling the SDMA of UART. 

  The error occurs in SDMA and recovery processing isn't done.

  So, I think that processing of "imx.c" or "tty_buffer" is doubtful.

 

[Question]

Could you gibe me the workaround about this issue?

 

[Related information]

https://community.freescale.com/message/355180#355180

 

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Best Regards,

Keita

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