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Android 5.0 UART5 bluetooth issue

Question asked by Wayne Lou on May 12, 2016
Latest reply on Oct 20, 2017 by Bruno Chen

Hi all,

 

I am trying to integrate wl18xx wifi&bluetooth to iMX6Q-sabresd board.

I have build for Andorid5.0 lollipop, kernel version is 3.10.53, and followed all steps from below link for both HW and SW changes

processors.wiki.ti.com/.../WL18xx_First_Time_Getting_Started_Guide_(IMX6)

Now wifi is working well, but bluetooth would have issue when enable from UI.

Below is the log when enable bluetooth:

root@sabresd_6dq:/ # period 66 ,timeout is 0, wake up is :0
mma enable setting active
request_suspend_state: wakeup (3->0) at 728639689419 (1970-01-01 00:12:06.377658086 UTC)
(hci_tty): inside hci_tty_open (bcc3a4d8, 936419c0)

(stc): chnl_id list empty :4 (stk) : st_kim_start
(stk) :ldisc_install = 1(stk) :ldisc installation timeout
(stk) :ldisc_install = 0(stk) : timed out waiting for ldisc to be un-installed
(stk) :ldisc_install = 1(stk) :ldisc installation timeout
(stk) :ldisc_install = 0(stk) : timed out waiting for ldisc to be un-installed
(stk) :ldisc_install = 1(stk) :ldisc installation timeout
(stk) :ldisc_install = 0(stk) : timed out waiting for ldisc to be un-installed
(stk) :ldisc_install = 1(stk) :ldisc installation timeout
(stk) :ldisc_install = 0(stk) : timed out waiting for ldisc to be un-installed
(stk) :ldisc_install = 1(stk) :ldisc installation timeout
(stk) :ldisc_install = 0(stk) : timed out waiting for ldisc to be un-installed
(stk) :ldisc_install = 1(stk) :ldisc installation timeout
(stk) :ldisc_install = 0(stk) : timed out waiting for ldisc to be un-installed
(hci_tty): st_register failed -22
root@sabresd_6dq:/ #

Could you tell me how to solve this problem? It seems to be caused from UART?

But I use the same HW, Android4.4 kitkat(no DT) is working well for bluetooth. So I could make sure HW is no problem, right?

Thanks very much!

BR,

Wayne

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