commit 474de5a7805241c653960a92464c537de6fd3f9a
author Ravi Kumar Alamanda <ralama@codeaurora.org> Thu Jun 25 20:08:01 2015 -0700
committer Ravi Kumar Alamanda <ralama@codeaurora.org> Tue Sep 15 13:27:39 2015 -0700
tree e21ee1c809442f33db10922ba9253173cb889a10
parent ac2d751182a58dc590f1bf8a531d59901a774959

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.

CRs-Fixed: 892056
Change-Id: I6685dd0f346072029ca51e4ce92856a13e74ee76

hal/audio_hw.c

diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index df907bf..4357d8d 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -165,7 +165,8 @@
 const char * const use_case_table[AUDIO_USECASE_MAX] = {
     [USECASE_AUDIO_PLAYBACK_DEEP_BUFFER] = "deep-buffer-playback",
     [USECASE_AUDIO_PLAYBACK_LOW_LATENCY] = "low-latency-playback",
-    [USECASE_AUDIO_PLAYBACK_MULTI_CH] = "multi-channel-playback",
+    [USECASE_AUDIO_PLAYBACK_ULL]         = "audio-ull-playback",
+    [USECASE_AUDIO_PLAYBACK_MULTI_CH]    = "multi-channel-playback",
     [USECASE_AUDIO_PLAYBACK_OFFLOAD] = "compress-offload-playback",
 #ifdef MULTIPLE_OFFLOAD_ENABLED
     [USECASE_AUDIO_PLAYBACK_OFFLOAD2] = "compress-offload-playback2",
@@ -3050,6 +3051,10 @@
         out->usecase = USECASE_AUDIO_PLAYBACK_AFE_PROXY;
         out->config = pcm_config_afe_proxy_playback;
         adev->voice_tx_output = out;
+    } else if (out->flags & AUDIO_OUTPUT_FLAG_RAW) {
+        out->usecase = USECASE_AUDIO_PLAYBACK_ULL;
+        out->config = pcm_config_low_latency;
+        out->sample_rate = out->config.rate;
     } else if (out->flags & AUDIO_OUTPUT_FLAG_FAST) {
         format = AUDIO_FORMAT_PCM_16_BIT;
         out->usecase = USECASE_AUDIO_PLAYBACK_LOW_LATENCY;
@@ -3675,6 +3680,7 @@
 {
     switch (period_size) {
     case 160:
+    case 192:
     case 240:
     case 320:
     case 480: