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Commit 474de5a7 authored by Ravi Kumar Alamanda's avatar Ravi Kumar Alamanda
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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
parent ac2d7511

hal/audio_hw.c

+7 −1
Original line number Diff line number Diff line
@@ -165,6 +165,7 @@ struct pcm_config pcm_config_afe_proxy_record = { 
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_ULL]         = "audio-ull-playback",

    [USECASE_AUDIO_PLAYBACK_MULTI_CH]    = "multi-channel-playback",

    [USECASE_AUDIO_PLAYBACK_OFFLOAD] = "compress-offload-playback",

#ifdef MULTIPLE_OFFLOAD_ENABLED
@@ -3050,6 +3051,10 @@ static int adev_open_output_stream(struct audio_hw_device *dev, 
        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 @@ static int period_size_is_plausible_for_low_latency(int period_size) 
{

    switch (period_size) {

    case 160:

    case 192:

    case 240:

    case 320:

    case 480:

hal/audio_hw.h

+1 −0
Original line number Diff line number Diff line
@@ -95,6 +95,7 @@ enum { 
    USECASE_AUDIO_PLAYBACK_OFFLOAD8,

    USECASE_AUDIO_PLAYBACK_OFFLOAD9,

#endif

    USECASE_AUDIO_PLAYBACK_ULL,



    USECASE_AUDIO_DIRECT_PCM_OFFLOAD,

hal/msm8974/platform.c

+4 −1
Original line number Diff line number Diff line
@@ -233,6 +233,8 @@ static int pcm_device_table[AUDIO_USECASE_MAX][2] = { 
                                            DEEP_BUFFER_PCM_DEVICE},

    [USECASE_AUDIO_PLAYBACK_LOW_LATENCY] = {LOWLATENCY_PCM_DEVICE,

                                           LOWLATENCY_PCM_DEVICE},

    [USECASE_AUDIO_PLAYBACK_ULL]         = {MULTIMEDIA3_PCM_DEVICE,

                                            MULTIMEDIA3_PCM_DEVICE},

    [USECASE_AUDIO_PLAYBACK_MULTI_CH] = {MULTIMEDIA2_PCM_DEVICE,

                                         MULTIMEDIA2_PCM_DEVICE},

    [USECASE_AUDIO_PLAYBACK_OFFLOAD] =
@@ -598,6 +600,7 @@ static char * backend_table[SND_DEVICE_MAX] = {0}; 
static struct name_to_index usecase_name_index[AUDIO_USECASE_MAX] = {

    {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_DEEP_BUFFER)},

    {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_LOW_LATENCY)},

    {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_ULL)},

    {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_MULTI_CH)},

    {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_OFFLOAD)},

#ifdef MULTIPLE_OFFLOAD_ENABLED

hal/msm8974/platform.h

+1 −0
Original line number Diff line number Diff line
@@ -217,6 +217,7 @@ enum { 
#define DEEP_BUFFER_PCM_DEVICE 0

#define AUDIO_RECORD_PCM_DEVICE 0

#define MULTIMEDIA2_PCM_DEVICE 1

#define MULTIMEDIA3_PCM_DEVICE 4

#define FM_PLAYBACK_PCM_DEVICE 5

#define FM_CAPTURE_PCM_DEVICE  6

#define HFP_PCM_RX 5