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Commit d1d2f886 authored by Ben YoungTae Kim's avatar Ben YoungTae Kim Committed by Pavlin Radoslavov
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Set the A2DP media channel as a high priority L2CAP link 

Use dynamic ACL buffer allocation for high priority links:
1. Ensure dedicated ACL buffers for high priority links
2. Adjust buffer allocation if the priority of the link changes

Test: Manually tested with 4 HID devices and A2DP streaming scenario
Bug: 30787081
Change-Id: Id3c4a76e360aee322e9f8073bd399807e7987990
parent c11bdda2

system/bta/av/bta_av_aact.cc

+2 −2
Original line number Diff line number Diff line
@@ -1330,8 +1330,8 @@ void bta_av_str_opened(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data) { 
                   p_scb->l2c_cid, p_scb->stream_mtu, mtu);

  if (mtu == 0 || mtu > p_scb->stream_mtu) mtu = p_scb->stream_mtu;



  /* Set the media channel as medium priority */

  L2CA_SetTxPriority(p_scb->l2c_cid, L2CAP_CHNL_PRIORITY_MEDIUM);

  /* Set the media channel as high priority */

  L2CA_SetTxPriority(p_scb->l2c_cid, L2CAP_CHNL_PRIORITY_HIGH);

  L2CA_SetChnlFlushability(p_scb->l2c_cid, true);



  bta_sys_conn_open(BTA_ID_AV, p_scb->app_id, p_scb->peer_addr);

system/stack/l2cap/l2c_utils.cc

+6 −6
Original line number Diff line number Diff line
@@ -2390,14 +2390,14 @@ bool l2cu_set_acl_priority(const bt_bdaddr_t& bd_addr, uint8_t priority, 
      BTM_VendorSpecificCommand(HCI_BRCM_SET_ACL_PRIORITY,

                                HCI_BRCM_ACL_PRIORITY_PARAM_SIZE, command,

                                NULL);

    }

  }



  /* Adjust lmp buffer allocation for this channel if priority changed */

  if (p_lcb->acl_priority != priority) {

    p_lcb->acl_priority = priority;

    l2c_link_adjust_allocation();

  }

    }

  }

  return (true);

}