commit 26483017c151b5de3f36e23307816037264d22e6
author Aniket Kumar Lata <alata@codeaurora.org> Wed Jan 31 20:21:42 2018 -0800
committer Petri Gynther <pgynther@google.com> Fri Mar 23 02:23:52 2018 +0000
tree 1164950535ed0336a8f4979642f3afeaee3dab49
parent 1e430887c0d166148449e8f406b3476ee9c21f5f

hal: Add support to enable A2DP offload

- Add new audio extension module for a2dp
- Add support to configure AFE encoder based
  on BT device capabilities
- Add support for soft handoff to re-configure
  AFE based on new BT device capability

Bug: 63932139
Bug: 68824150
Test: A2DP offload verified on supported codecs
Change-Id: Idede77276d2be99fa7e7400495248fe2e63eecf5
(cherry picked from commit fca405d5a8c16566cd514b7dcb94ee755e7c62a3)

hal/msm8916/platform.c

diff --git a/hal/msm8916/platform.c b/hal/msm8916/platform.c
index 66803bc..cb7346b 100644
--- a/hal/msm8916/platform.c
+++ b/hal/msm8916/platform.c
@@ -211,6 +211,8 @@
     [SND_DEVICE_OUT_SPEAKER_AND_HDMI] = "speaker-and-hdmi",
     [SND_DEVICE_OUT_BT_SCO] = "bt-sco-headset",
     [SND_DEVICE_OUT_BT_SCO_WB] = "bt-sco-headset-wb",
+    [SND_DEVICE_OUT_BT_A2DP] = "bt-a2dp",
+    [SND_DEVICE_OUT_SPEAKER_AND_BT_A2DP] = "speaker-and-bt-a2dp",
     [SND_DEVICE_OUT_VOICE_TTY_FULL_HEADPHONES] = "voice-tty-full-headphones",
     [SND_DEVICE_OUT_VOICE_TTY_VCO_HEADPHONES] = "voice-tty-vco-headphones",
     [SND_DEVICE_OUT_VOICE_TTY_HCO_HANDSET] = "voice-tty-hco-handset",
@@ -302,6 +304,8 @@
     [SND_DEVICE_OUT_SPEAKER_AND_HDMI] = 14,
     [SND_DEVICE_OUT_BT_SCO] = 22,
     [SND_DEVICE_OUT_BT_SCO_WB] = 39,
+    [SND_DEVICE_OUT_BT_A2DP] = 20,
+    [SND_DEVICE_OUT_SPEAKER_AND_BT_A2DP] = 14,
     [SND_DEVICE_OUT_VOICE_TTY_FULL_HEADPHONES] = 17,
     [SND_DEVICE_OUT_VOICE_TTY_VCO_HEADPHONES] = 17,
     [SND_DEVICE_OUT_VOICE_TTY_HCO_HANDSET] = 37,
@@ -400,6 +404,8 @@
     {TO_NAME_INDEX(SND_DEVICE_OUT_SPEAKER_AND_HDMI)},
     {TO_NAME_INDEX(SND_DEVICE_OUT_BT_SCO)},
     {TO_NAME_INDEX(SND_DEVICE_OUT_BT_SCO_WB)},
+    {TO_NAME_INDEX(SND_DEVICE_OUT_BT_A2DP)},
+    {TO_NAME_INDEX(SND_DEVICE_OUT_SPEAKER_AND_BT_A2DP)},
     {TO_NAME_INDEX(SND_DEVICE_OUT_VOICE_TTY_FULL_HEADPHONES)},
     {TO_NAME_INDEX(SND_DEVICE_OUT_VOICE_TTY_VCO_HEADPHONES)},
     {TO_NAME_INDEX(SND_DEVICE_OUT_VOICE_TTY_HCO_HANDSET)},
@@ -671,6 +677,8 @@
     backend_table[SND_DEVICE_IN_BT_SCO_MIC_WB_NREC] = strdup("bt-sco-wb");
     backend_table[SND_DEVICE_OUT_BT_SCO] = strdup("bt-sco");
     backend_table[SND_DEVICE_OUT_BT_SCO_WB] = strdup("bt-sco-wb");
+    backend_table[SND_DEVICE_OUT_BT_A2DP] = strdup("bt-a2dp");
+    backend_table[SND_DEVICE_OUT_SPEAKER_AND_BT_A2DP] = strdup("speaker-and-bt-a2dp");
     backend_table[SND_DEVICE_OUT_HDMI] = strdup("hdmi");
     backend_table[SND_DEVICE_OUT_SPEAKER_AND_HDMI] = strdup("speaker-and-hdmi");
     backend_table[SND_DEVICE_OUT_VOICE_TX] = strdup("afe-proxy");
@@ -1056,6 +1064,8 @@
     resolve_config_file(platform_info_path);
     platform_info_init(platform_info_path, my_data);
 
+    /*init a2dp*/
+    audio_extn_a2dp_init(adev);
 
     /* Read one time ssr property */
     audio_extn_spkr_prot_init(adev);
@@ -1618,6 +1628,9 @@
         } else if (devices == (AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET |
                                AUDIO_DEVICE_OUT_SPEAKER)) {
             snd_device = SND_DEVICE_OUT_SPEAKER_AND_USB_HEADSET;
+        } else if ((devices & AUDIO_DEVICE_OUT_SPEAKER) &&
+                   (devices & AUDIO_DEVICE_OUT_ALL_A2DP)) {
+            snd_device = SND_DEVICE_OUT_SPEAKER_AND_BT_A2DP;
         } else {
             ALOGE("%s: Invalid combo device(%#x)", __func__, devices);
             goto exit;
@@ -1661,6 +1674,8 @@
                 snd_device = SND_DEVICE_OUT_BT_SCO_WB;
             else
                 snd_device = SND_DEVICE_OUT_BT_SCO;
+        } else if (devices & AUDIO_DEVICE_OUT_ALL_A2DP) {
+                snd_device = SND_DEVICE_OUT_BT_A2DP;
         } else if (devices & AUDIO_DEVICE_OUT_SPEAKER) {
             if (audio_extn_hfp_is_active(adev))
                 snd_device = SND_DEVICE_OUT_VOICE_SPEAKER_HFP;
@@ -1694,6 +1709,8 @@
             snd_device = SND_DEVICE_OUT_BT_SCO_WB;
         else
             snd_device = SND_DEVICE_OUT_BT_SCO;
+    } else if (devices & AUDIO_DEVICE_OUT_ALL_A2DP) {
+        snd_device = SND_DEVICE_OUT_BT_A2DP;
     } else if (devices & AUDIO_DEVICE_OUT_AUX_DIGITAL) {
         snd_device = SND_DEVICE_OUT_HDMI ;
     } else if (devices & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET ||