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WL1831MOD: Iphone6 play music sound is not smooth

huibin chen
Intellectual 375 points
Part Number: WL1831MOD
Other Parts Discussed in Thread: WL1831

1.A2DP and AVRP connected to iphone6.Hf connected to phone（vivo y13l） .

2.Send the avrcp command to play the phone-side music

3.Iphone6 play music sound is not smooth

4.As follows bf fw log(55.rar), from 5421 lines began to receive a2dp audio data

55.rar

6.There are some abnormalities, this is the phone side of the problem? Or wl1831 problem?

For example, line 5840：5840 11:37:55.191   +0:01:06.944 Dropping cause: retransmission=0, no_buffers=0, lc_handle=1, erroneous_lmp=0

  • 0
    TI__Mastermind 35795 points
    Hi ,
    We have assigned your query to relevant engineer. We will get back to you shortly

    Thanks
    Saurabh
  • 0 in reply to S
    TI__Mastermind 27080 points
    Can, you provide following information -
    a) Complete FW log from the beginning.
    b) Link policy parameters set for each connection.

    And, in addition, is 'HCI_Flow_Specification' used for the the a2dp connection. If so, what is the service type selected.

    Thanks
  • 0 in reply to Hari Nagalla
    Intellectual 375 points

    Hi Hari Nagalla,

        a)The following 66.rar file.66.rar

    b)You have to ask is the set value of 0x080d?

    vivo y13l:View 66.rar file 6888 lines,

    6888 08/31/17 10:33:29.760 +0:02:43.978 0x00014D72 0x003F6AE9 HCI_Write_Link_Policy_Settings ---->

    iphone6:View 66.rar file 9996 lines,

    9996 08/31/17 10:34:07.522 +0:03:21.740 0x0001C392 0x0001E109 HCI_Write_Link_Policy_Settings ---->

    And, in addition, is 'HCI_Flow_Specification' used for the the a2dp connection. If so, what is the service type selected.

    =>We did not send HCI's 0x0810 command.Incidentally, this phenomenon lasts about 15 seconds after the start of the play, after which the sound is normal.

  • 0 in reply to huibin chen
    TI__Mastermind 27080 points
    We reviewed the logs and here are the observations -
    a) It appears WL18xx may be getting into a scatter net situation, that can explain the packet drops/losses. We recommend the following :
    - With, HCI_Role_Discovery, check the Role,
    - If, it is 'Slave', change to Master with 'HCI_Role_Change
    - And issue (if master), HCI_Link_policy and disallos role change.

    b) Also, please use the P2.142 patch provided to you.

    Thanks
  • 0 in reply to Hari Nagalla
    Intellectual 375 points

    Hi Hari Nagalla,

        a)See roleswitch. rar files.roleswitch.rar

          ipone6 Switch not allowed .

    5806 09/04/17 11:17:54.755 +0:02:09.122 0x0000F3E5 0x0037AB57 <---- HCI_Role_Change_Event

    5808 09/04/17 11:17:54.756 +0:02:09.123 0x0000F3E7 0x0037AB59 HCI_Switch_Role ---->

    5842 09/04/17 11:17:54.822 +0:02:09.189 0x0000F422 0x0037AB94 LMP_not_accepted Opcode = LMP_switch_req, Reason = Switch not allowed  

      b)See 2.142.rar files.  2.142.rar

    The problem  also exists.

    57029 10:13:03.538 +0:11:44.210 0x000898A1 0x00082B80 <---- HCI_Role_Change_Event

    58047 10:13:13.494 +0:11:54.166 Dropping received packet to bb_handle 6: pkt_type=3, l_ch=1, len=0

    58048 10:13:13.494 +0:11:54.166 Dropping cause: retransmission=0, no_buffers=0, lc_handle=1, erroneous_lmp=0

  • 0 in reply to Hari Nagalla
    Intellectual 375 points
    By the way, this phenomenon is happening occasionally. For example, 2.142.rar file 14607 lines began to be normal.
  • 0 in reply to Hari Nagalla
    Intellectual 375 points
    Sep 4, 2017 3:37 AM,Reply