commit 2bc7b02259e0edf38432b258594da29571f29713
author Ravi Kumar Alamanda <ralama@codeaurora.org> Thu Jun 25 20:08:01 2015 -0700
committer Eric Laurent <elaurent@google.com> Mon Aug 24 16:43:36 2015 -0700
tree 5cc4bc85293cf13bf6dcf85e62d8797cdbe9a4f1
parent 788f41f13d5a4c592d124bd1dc0aa4d5ec18d595

hal: add support for ull audio playback

Add a new use case and mixer paths to support ultra
low latency audio playback. This use case exercises the
ULL mode in the DSP.

Bug: 10546170

Change-Id: I6685dd0f346072029ca51e4ce92856a13e74ee76

hal/audio_hw.c

diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index b307f6c..486ce8f 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -155,6 +155,7 @@
     [USECASE_AUDIO_PLAYBACK_MULTI_CH] = "multi-channel-playback",
     [USECASE_AUDIO_PLAYBACK_OFFLOAD] = "compress-offload-playback",
     [USECASE_AUDIO_PLAYBACK_TTS] = "audio-tts-playback",
+    [USECASE_AUDIO_PLAYBACK_ULL] = "audio-ull-playback",
 
     [USECASE_AUDIO_RECORD] = "audio-record",
     [USECASE_AUDIO_RECORD_LOW_LATENCY] = "low-latency-record",
@@ -2172,6 +2173,9 @@
         } else if (out->flags & AUDIO_OUTPUT_FLAG_TTS) {
             out->usecase = USECASE_AUDIO_PLAYBACK_TTS;
             out->config = pcm_config_deep_buffer;
+        } else if (out->flags & AUDIO_OUTPUT_FLAG_RAW) {
+            out->usecase = USECASE_AUDIO_PLAYBACK_ULL;
+            out->config = pcm_config_low_latency;
         } else {
             out->usecase = USECASE_AUDIO_PLAYBACK_LOW_LATENCY;
             out->config = pcm_config_low_latency;

hal/audio_hw.h

diff --git a/hal/audio_hw.h b/hal/audio_hw.h
index b4b2583..760e2f0 100644
--- a/hal/audio_hw.h
+++ b/hal/audio_hw.h
@@ -58,6 +58,7 @@
     USECASE_AUDIO_PLAYBACK_MULTI_CH,
     USECASE_AUDIO_PLAYBACK_OFFLOAD,
     USECASE_AUDIO_PLAYBACK_TTS,
+    USECASE_AUDIO_PLAYBACK_ULL,
 
     /* HFP Use case*/
     USECASE_AUDIO_HFP_SCO,

hal/msm8974/platform.c

diff --git a/hal/msm8974/platform.c b/hal/msm8974/platform.c
index 4958cb1..7baf226 100644
--- a/hal/msm8974/platform.c
+++ b/hal/msm8974/platform.c
@@ -136,12 +136,16 @@
                                          MULTIMEDIA2_PCM_DEVICE},
     [USECASE_AUDIO_PLAYBACK_OFFLOAD] = {PLAYBACK_OFFLOAD_DEVICE,
                                         PLAYBACK_OFFLOAD_DEVICE},
-    [USECASE_AUDIO_PLAYBACK_TTS] = {MULTIMEDIA3_PCM_DEVICE,
-                                        MULTIMEDIA3_PCM_DEVICE},
+    [USECASE_AUDIO_PLAYBACK_TTS] = {MULTIMEDIA2_PCM_DEVICE,
+                                        MULTIMEDIA2_PCM_DEVICE},
+    [USECASE_AUDIO_PLAYBACK_ULL] = {MULTIMEDIA3_PCM_DEVICE,
+                                    MULTIMEDIA3_PCM_DEVICE},
+
     [USECASE_AUDIO_RECORD] = {AUDIO_RECORD_PCM_DEVICE,
                               AUDIO_RECORD_PCM_DEVICE},
     [USECASE_AUDIO_RECORD_LOW_LATENCY] = {LOWLATENCY_PCM_DEVICE,
                                           LOWLATENCY_PCM_DEVICE},
+
     [USECASE_VOICE_CALL] = {VOICE_CALL_PCM_DEVICE,
                             VOICE_CALL_PCM_DEVICE},
     [USECASE_VOICE2_CALL] = {VOICE2_CALL_PCM_DEVICE, VOICE2_CALL_PCM_DEVICE},
@@ -431,6 +435,8 @@
     {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_LOW_LATENCY)},
     {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_MULTI_CH)},
     {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_OFFLOAD)},
+    {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_TTS)},
+    {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_ULL)},
     {TO_NAME_INDEX(USECASE_AUDIO_RECORD)},
     {TO_NAME_INDEX(USECASE_AUDIO_RECORD_LOW_LATENCY)},
     {TO_NAME_INDEX(USECASE_VOICE_CALL)},