commit c01e7fbedd8d82ce4c6ecb2f24e89045f09ae696
author Ajay Panicker <apanicke@google.com> Wed Sep 06 09:59:51 2017 -0700
committer android-build-team Robot <android-build-team-robot@google.com> Thu Sep 21 23:23:37 2017 +0000
tree 9b418a83239c1f65b8fbe7567138ec22d113ee9c
parent e132952625c8431e6c66082695a0e47be2fbb006

Change our AVRCP capabilities if the remote device only supports 1.3

This prevents issues with devices that only support 1.3 but can not
handle forward compatability like some Alpine Carkits.

Bug: 37943083
Test: Connect to Alpine carkit that only supports 1.3 and see new features
      are used.

Change-Id: I6d041590dc51d7e8711b17fb1cb9c880b640052a
Merged-In: I6d041590dc51d7e8711b17fb1cb9c880b640052a
(cherry picked from commit f9f1c8b449efb9cb7894a64fe2977f875679ba52)
(cherry picked from commit ff2d86ed3af91099597d033a76a143437543d6fd)
(cherry picked from commit e6b0e1a20c03ba0dae26066ac1730bbf668d9415)

bta/av/bta_av_act.cc

diff --git a/bta/av/bta_av_act.cc b/bta/av/bta_av_act.cc
index 1e27c25..67a8299 100644
--- a/bta/av/bta_av_act.cc
+++ b/bta/av/bta_av_act.cc
@@ -1788,6 +1788,23 @@
       peer_features |=
           bta_av_check_peer_features(UUID_SERVCLASS_AV_REM_CTRL_TARGET);
     }
+
+    /* Change our features if the remote AVRCP version is 1.3 or less */
+    tSDP_DISC_REC* p_rec = nullptr;
+    p_rec = SDP_FindServiceInDb(p_cb->p_disc_db,
+                                UUID_SERVCLASS_AV_REMOTE_CONTROL, p_rec);
+    if (p_rec != NULL &&
+        SDP_FindAttributeInRec(p_rec, ATTR_ID_BT_PROFILE_DESC_LIST) != NULL) {
+      /* get profile version (if failure, version parameter is not updated) */
+      uint16_t peer_rc_version = 0xFFFF;  // Don't change the AVRCP version
+      SDP_FindProfileVersionInRec(p_rec, UUID_SERVCLASS_AV_REMOTE_CONTROL,
+                                  &peer_rc_version);
+      if (peer_rc_version <= AVRC_REV_1_3) {
+        APPL_TRACE_DEBUG("%s Using AVRCP 1.3 Capabilities with remote device",
+                         __func__);
+        p_bta_av_cfg = (tBTA_AV_CFG*)&bta_av_cfg_compatibility;
+      }
+    }
   }
 
   p_cb->disc = 0;