當前位置：首頁 > 运维知识 > Android >内容正文

Android

Android - Audio - Qcom平台 - hac器件bring up

發布時間：2024/3/12 Android 47 豆豆

生活随笔收集整理的這篇文章主要介紹了 Android - Audio - Qcom平台 - hac器件bring up 小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

?

背景
正文
- 助聽器構造
- 使用方式
- HAC部分硬件原理圖
- 硬件調試需求
- 軟件平臺及框架
  - a:mixer_path.xml中添加hac path
  - b:alsa用戶空間，tinyalsa中注冊HAC控件
  - c:GPIO_HAC_EN
  - d:添加acdb_id
  - e:為MMITest添加測試項
結語

背景

公司的項目要求支持助聽器（HAC器件，Hearing Aid Compatibility），以此正好再復習一下在android的框架下如何bring up一個類似PA的器件。

正文

我們首先需要了解助聽器的原理，使用方式（以此確定測試手段），硬件原理圖（以此確定軟件如何適配），硬件調試需求，軟件平臺以及框架（MTK和Qcom在底層有一些差別）。

既然已經明確了步驟，那么就開始一步一步來；

(1)助聽器構造:

從百度百科來看，助聽器有5個主要的構造，麥克風，放大器，接收器，電源和外殼。
其中對我們這次開發有用的就是接收器，因為mic用手機的mic就夠了。

(2)使用方式:

按照我拿到的助聽器，上了電池之后默認是放大聲音的模式，我理解的助聽器基本上也是放大器的作用，但是HAC器件實際上還有一個功能，就是電圈耦合，按下助聽器上的按鈕觸發，從以往的功能定義來看在打電話的時候該功能才打開（但是個人疑問助聽器不是應該時時刻刻都幫助聽障人士更清楚的聽到聲音么，難道是怕耗電快？）。
知道了使用方式，我在測試效果的時候發現Receiver發出的聲音實際上會影響到功能判斷，所以我直接將Receiver器件和speaker器件給去掉了（去掉speaker主要是為了測試后面添加path的可行性。）

(3)HAC部分硬件原理圖:

+-----------+ INP +-------------+ VON +----------+ | CDC_EAR_M | ~~~~~> | | ~~~~~> | HAC 線圈 | +-----------+ | | +----------+| | VOP ^| AW8155FCR | ~~~~~~~~~*| | +-----------+ INN | | | CDC_EAR_P | ~~~~~> | | +-----------+ +-------------+^} INP}+-------------+| GPIO_HAC_EN |+-------------+

從原理圖我們能明顯的看到有一個艾薇的放大器，通過對CDC_EAR通路的查詢，發現接到了Receiver器件上，所以電信號的數據輸出可以理解為既給了Receiver，會給到hac部分。

(4)硬件調試需求:

和硬件同事進行溝通，發現有如下需求
–1. 器件bring up。
–2. 單獨一條acdb id。
–3. dialer界面有設置HAC功能打開的接口。
–4. MMITest里面能進行測試。

(5)軟件平臺及框架:

根據需求，我們可以大致確定這需要從上到下一起打通，那么就需要像普通的PA那樣單獨配置一個path，而且還需要額外加一條acdb_id，以供調試。

然后就是和上層通信的接口，可以按照屬性值的方式來，也可以按照其他方式，暫時先通過屬性值來比較方便。

MMITest當中則需要通過path的開關來控制，所以配置一個單獨的path是必須的。

根據以上的軟件需求，我將此次的軟件開發分為如下步驟：
a : mixer_path.xml中添加hac path。
b : 在alsa用戶空間，tinyalsa中注冊HAC控件。
c : tinyalsa中操作mixer，達到想調用hac path的時候能操作GPIO_HAC_EN，數據信號則不在此處控制。
d : hal層添加一個RX 的 acdb_id，TX已經確定是4，RX為31。
e : MMITest測試調用的audio_test.sh中添加 HAC PATH 的開關。

a

在hardware/qcom/audio/configs/msm8937/mixer_path_mtp.xml中添加HAC_PA的控件聲明和path操作。

在需要打開PA的場景中打開PA，此處應個人測試需求，在speaker的path中也打開了HAC_PA。

這個時候我們能在mixer.xml中看到配置了path，但是tinyalsa并沒有注冊HAC_PA這條path，在我的理解這個并不是針對注冊的接口。
至于為什么選擇的是 mixer_paths_mtp.xml ，這個可以查看/hardware/qcom/audio/hal/msm8916/platform.c對聲卡的判斷，然后選擇對應的mixer_path.xml文件。

b

在alsa用戶空間，tinyalsa中注冊HAC控件。

注冊的時候需要用到alsa提供出來的接口SOC_ENUM_SINGLE_EXT，當然也有其他的接口，比如SOC_DAPM_ENUM、SOC_SINGLE_TLV；這兩個分別是需要注冊到動態音頻電源管理模塊，另外一個的注釋是“Convenience kcontrol builders”，主要用于定義那些有增益控制的控件，例如音量控制器，EQ均衡器等等。
我的代碼如下( 路徑：vendor/qcom/opensource/audio-kernel/asoc/codecs/sdm660_cdc/msm-analog-cdc.c )：

/*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ static const char * const hac_pa_text[] = { "Off", "On"}; static const struct soc_enum hac_enum[] = { SOC_ENUM_SINGLE_EXT(2, hac_pa_text), }; /*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */.../*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ SOC_ENUM_EXT("HAC_PA", hac_enum[0],hac_pa_gpio_get,hac_pa_gpio_set), /*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */

c

實際上這里已經注冊好了HAC_PA了，只要申明一下set函數和get函數，然后編譯就能用tinymix看到HAC_PA的path了，但顯然是不能工作的。
所以接下來就是定義hac_pa_gpio_get以及hac_pa_gpio_set，其中hac_pa_set需要額外在sdm660_cdc_priv結構體中添加，

/*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ static int hac_pa_gpio_get(struct snd_kcontrol *kcontrol,struct snd_ctl_elem_value *ucontrol) {struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);struct sdm660_cdc_priv *sdm660_cdc =snd_soc_codec_get_drvdata(codec);ucontrol->value.integer.value[0] =(sdm660_cdc->hac_pa_set ? 1 : 0);dev_err(codec->dev, "%s: fuhua sdm660_cdc->hac_pa_set = %d\n",__func__, sdm660_cdc->hac_pa_set);return 0; }static int hac_pa_gpio_set(struct snd_kcontrol *kcontrol,struct snd_ctl_elem_value *ucontrol) {struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);struct sdm660_cdc_priv *sdm660_cdc =snd_soc_codec_get_drvdata(codec);dev_err(codec->dev, "%s: fuhua ucontrol->value.integer.value[0] = %ld\n",__func__, ucontrol->value.integer.value[0]);sdm660_cdc->hac_pa_set =(ucontrol->value.integer.value[0] ? true : false);if(sdm660_cdc->hac_pa_set){//msm_cdc_pinctrl_select_active_state(sdm660_cdc->hac_pa_gpio_p);//enable_hac_pa(codec,true);if (sdm660_cdc->codec_hac_pa_cb)sdm660_cdc->codec_hac_pa_cb(codec, 1);}else{//msm_cdc_pinctrl_select_sleep_state(sdm660_cdc->hac_pa_gpio_p);//enable_hac_pa(codec,false);if (sdm660_cdc->codec_hac_pa_cb)sdm660_cdc->codec_hac_pa_cb(codec, 0);}return 0; }/*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */

其中的set函數會讀取HAC_PA的控件值，然后去調用sdm660_cdc->codec_hac_pa_cb函數，而這個函數指針在另一個地方已經賦值成了另一個函數，如下sdm660_cdc->codec_hac_pa_cb = codec_hac_pa;：

/*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ void msm_anlg_cdc_hac_pa_cb(int (*codec_hac_pa)(struct snd_soc_codec *codec,int enable), struct snd_soc_codec *codec) {struct sdm660_cdc_priv *sdm660_cdc;if (!codec) {pr_err("%s: NULL codec pointer!\n", __func__);return;}sdm660_cdc = snd_soc_codec_get_drvdata(codec);dev_err(codec->dev, "%s: fuhua Enter\n", __func__);sdm660_cdc->codec_hac_pa_cb = codec_hac_pa; } EXPORT_SYMBOL(msm_anlg_cdc_hac_pa_cb); /*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */

這個msm_anlg_cdc_hac_pa_cb已經在msm-analog-cdc.h中已經聲明成extern。剛剛我們在sdm660_cdc這個目錄下完成了驅動的注冊，現在來到vendor/qcom/opensource/audio-kernel/asoc/msm8952.c繼續完成實現，這些都是在alsa的用戶空間進行操作的，也就是用了接口之后的部分。我們首先要在msm_audrx_init函數中調用msm_anlg_cdc_hac_pa_cb(enable_hac_pa, ana_cdc);，以注冊enable_hac_pa函數。

static int msm_audrx_init(struct snd_soc_pcm_runtime *rtd) {struct snd_soc_codec *dig_cdc = rtd->codec_dais[DIG_CDC]->codec;struct snd_soc_codec *ana_cdc = rtd->codec_dais[ANA_CDC]->codec;...snd_soc_dapm_ignore_suspend(dapm, "EAR");snd_soc_dapm_ignore_suspend(dapm, "HEADPHONE");snd_soc_dapm_ignore_suspend(dapm, "SPK_OUT");.../*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */msm_anlg_cdc_hac_pa_cb(enable_hac_pa, ana_cdc);/*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */

這個init函數中我們還能看到snd_soc_dapm_ignore_suspend函數，這就是在哪里忽略path的地方。那么接下來就是具體實現enable_hac_pa ,代碼如下：

/*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ static int enable_hac_pa(struct snd_soc_codec *codec, int enable) {struct snd_soc_card *card = codec->component.card;struct msm_asoc_mach_data *pdata = snd_soc_card_get_drvdata(card);int ret = 0;int i = 0;int extamp_mode = 2; //ext pa default mode 2if (!gpio_is_valid(pdata->hac_pa_gpio)) {pr_err("%s: Invalid gpio: %d\n", __func__,pdata->hac_pa_gpio);return false;}pr_err("%s: %s fuhua HAC PA\n", __func__,enable ? "Enable" : "Disable");if (enable) {for( i=0 ; i<extamp_mode ; i++){ret = msm_cdc_pinctrl_select_sleep_state(pdata->hac_pa_gpio_p);if (ret) {pr_err("%s: gpio set cannot be de-sleeped %s\n ",__func__,"lo_spk_gpio");return ret;}udelay(2);ret = msm_cdc_pinctrl_select_active_state(pdata->hac_pa_gpio_p);if (ret) {pr_err("%s: gpio set cannot be de-activated %s\n",__func__, "lo_spk_gpio");return ret;}pr_err("%s: %s i=%d\n ",__func__,enable ? "Enable" : "Disable",i);}gpio_set_value_cansleep(pdata->hac_pa_gpio, enable);} else {gpio_set_value_cansleep(pdata->hac_pa_gpio, enable);pr_err("%s: %s\n ",__func__,enable ? "Enable" : "Disable");ret = msm_cdc_pinctrl_select_sleep_state(pdata->hac_pa_gpio_p);if (ret) {pr_err("%s: gpio set cannot be de-activated %s\n",__func__, "lo_spk_gpio");return ret;}}return 0; } /*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */

其中定義了pa的模式，extamp_mode，剩下的主要操作就是通過Qcom的接口開關引腳了。
msm_cdc_pinctrl_select_active_state(pdata->hac_pa_gpio_p);
msm_cdc_pinctrl_select_sleep_state(pdata->hac_pa_gpio_p);
gpio_set_value_cansleep(pdata->hac_pa_gpio, enable);
但是控制的時候肯定不能直接指定端口嘛，這種太不便于管理了，我們是有管理的公司，要為后來的產品造福，不要寫些爛代碼，雖然繁瑣。所以需要在probe的時候遍歷一遍：

static int msm8952_asoc_machine_probe(struct platform_device *pdev) {struct snd_soc_card *card;struct msm_asoc_mach_data *pdata = NULL;const char *hs_micbias_type = "qcom,msm-hs-micbias-type";const char *ext_pa = "qcom,msm-ext-pa";const char *mclk = "qcom,msm-mclk-freq";const char *wsa = "asoc-wsa-codec-names";const char *wsa_prefix = "asoc-wsa-codec-prefixes";const char *type = NULL;const char *ext_pa_str = NULL;const char *wsa_str = NULL;const char *wsa_prefix_str = NULL;const char *spk_ext_pa = "qcom,msm-spk-ext-pa";/*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */const char *hac_pa = "qcom,msm-hac-pa";const char *hac_pa_p = "qcom,msm-hac-pa-gpio";/*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */int num_strings;...pr_debug("%s: ext_pa = %d\n", __func__, pdata->ext_pa);/*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */pdata->hac_pa_gpio = of_get_named_gpio(pdev->dev.of_node, hac_pa, 0);if (pdata->hac_pa_gpio < 0) {dev_err(&pdev->dev, "%s: missing %s in dt node\n", __func__, hac_pa);}pdata->hac_pa_gpio_p = of_parse_phandle(pdev->dev.of_node, hac_pa_p, 0);if (pdata->hac_pa_gpio_p < 0) {dev_err(&pdev->dev, "%s: missing %s in dt node\n", __func__, hac_pa_p);}/*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */pdata->spk_ext_pa_gpio = of_get_named_gpio(pdev->dev.of_node,spk_ext_pa, 0);if (pdata->spk_ext_pa_gpio < 0) {

以上代碼就是讀取dts中的定義，那么dts中又添加了什么呢？(我是在kernel/msm-4.9/arch/arm64/boot/dts/qcom/qm215-audio.dtsi中添加的，當然可以選擇其他地方)

/*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ &tlmm {hac_pa {hac_pa_high: hac_pa_high {mux {pins = "gpio127";function = "gpio";};config {pins = "gpio127";drive-strength = <8>; /* 8mA */bias-disable = <0>; /* no pull */output-high;};};hac_pa_low: hac_pa_low {mux {pins = "gpio127";function = "gpio";};config {pins = "gpio127";drive-strength = <2>;output-low;bias-pull-down;};};}; }; /*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ &soc {qcom,msm-audio-apr {compatible = "qcom,msm-audio-apr";msm_audio_apr_dummy {compatible = "qcom,msm-audio-apr-dummy";};};qcom,avtimer@c0a300c {compatible = "qcom,avtimer";reg = <0x0c0a300c 0x4>,<0x0c0a3010 0x4>;reg-names = "avtimer_lsb_addr", "avtimer_msb_addr";qcom,clk-div = <27>;};/*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */cdc_hac_pa_gpio: msm_cdc_pinctrl@127 {compatible = "qcom,msm-cdc-pinctrl";pinctrl-names = "aud_active", "aud_sleep";pinctrl-0 = <&hac_pa_high>;pinctrl-1 = <&hac_pa_low>;};/*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */int_codec: sound {status = "okay";compatible = "qcom,msm8952-audio-codec";qcom,model = "msm8952-snd-card-mtp";reg = <0xc051000 0x4>,<0xc051004 0x4>,<0xc055000 0x4>,<0xc052000 0x4>;reg-names = "csr_gp_io_mux_mic_ctl","csr_gp_io_mux_spkr_ctl","csr_gp_io_lpaif_pri_pcm_pri_mode_muxsel","csr_gp_io_mux_quin_ctl";qcom,msm-ext-pa = "primary"; /*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */qcom,msm-hac-pa = <&tlmm 127 0>;qcom,msm-hac-pa-gpio = <&cdc_hac_pa_gpio>; /*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */qcom,msm-mclk-freq = <9600000>;qcom,msm-mbhc-hphl-swh = <1>;qcom,msm-mbhc-gnd-swh = <1>;

這些添加完成之后，基本上就能通過tinyalsa去控制“HAC_PA”的On/Off了，達到想打開GPIO_HAC_EN的時候就能打開。

d

那么硬件的同事還有兩個需求，第一個就是配對一個acdb_id,這樣能方便他們配對調試，那么在hal層需要做什么呢?(目錄：hardware/qcom/audio)由于比較零散，也比較簡單，知識點不多，所以直接貼上diff文件吧，這一份是比較早的代碼備份，有一點邏輯是有問題的。文件直接通過git diff ./ > diff.txt導出來就可以了。

diff --git a/hal/audio_hw.c b/hal/audio_hw.c index 3404dd6..bed0ec3 100644 --- a/hal/audio_hw.c +++ b/hal/audio_hw.c @@ -6866,6 +6866,23 @@ static int adev_set_parameters(struct audio_hw_device *dev, const char *kvpairs)status = platform_set_parameters(adev->platform, parms);if (status != 0)goto done; +/*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ + ret = str_parms_get_str(parms, "odm.hac.enable", value, sizeof(value)); + if(ret >= 0) + { + ALOGE("fuhua ---- get odm.hac.enable = %s",value); + if(strcmp(value,AUDIO_PARAMETER_VALUE_ON) == 0) + {adev->hac_enable = true;} + else + {adev->hac_enable = false;} + } + else + { + ALOGE("fuhua ---- not get the odm.hac.enable = %s",value); + } + +/*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ +ret = str_parms_get_str(parms, AUDIO_PARAMETER_KEY_BT_NREC, value, sizeof(value));if (ret >= 0) { diff --git a/hal/audio_hw.h b/hal/audio_hw.h index f791b6a..3865c0f 100644 --- a/hal/audio_hw.h +++ b/hal/audio_hw.h @@ -493,6 +493,9 @@ struct audio_device {bool allow_afe_proxy_usage;bool is_charging; // from battery listenerbool mic_break_enabled; + /*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ + bool hac_enable; + /*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */int snd_card;card_status_t card_status; diff --git a/hal/msm8916/platform.c b/hal/msm8916/platform.c index aeb3abe..7a8d94e 100644 --- a/hal/msm8916/platform.c +++ b/hal/msm8916/platform.c @@ -488,7 +488,9 @@ static const char * const device_table[SND_DEVICE_MAX] = {[SND_DEVICE_OUT_VOIP_SPEAKER] = "voip-speaker",[SND_DEVICE_OUT_VOIP_HEADPHONES] = "voip-headphones", #endif - + /*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ + [SND_DEVICE_OUT_VOICE_HANDSET_HAC] = "voice-handset-hac", + /*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 *//* Capture sound devices */[SND_DEVICE_IN_HANDSET_MIC] = "handset-mic",[SND_DEVICE_IN_HANDSET_MIC_EXTERNAL] = "handset-mic-ext", @@ -668,6 +670,9 @@ static int acdb_device_table[SND_DEVICE_MAX] = {[SND_DEVICE_OUT_VOIP_SPEAKER] = 132,[SND_DEVICE_OUT_VOIP_HEADPHONES] = 134, #endif + /*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ + [SND_DEVICE_OUT_VOICE_HANDSET_HAC] = 31, + /*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */[SND_DEVICE_IN_HANDSET_MIC] = 4,[SND_DEVICE_IN_HANDSET_MIC_EXTERNAL] = 4, @@ -832,6 +837,10 @@ static struct name_to_index snd_device_name_index[SND_DEVICE_MAX] = {{TO_NAME_INDEX(SND_DEVICE_OUT_VOIP_SPEAKER)},{TO_NAME_INDEX(SND_DEVICE_OUT_VOIP_HEADPHONES)}, #endif + /*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ + {TO_NAME_INDEX(SND_DEVICE_OUT_VOICE_HANDSET_HAC)}, + /*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ + {TO_NAME_INDEX(SND_DEVICE_IN_HANDSET_MIC)},{TO_NAME_INDEX(SND_DEVICE_IN_HANDSET_MIC_EXTERNAL)},{TO_NAME_INDEX(SND_DEVICE_IN_HANDSET_MIC_AEC)}, @@ -4307,6 +4316,18 @@ snd_device_t platform_get_output_snd_device(void *platform, struct stream_out *osnd_device = SND_DEVICE_OUT_ANC_HANDSET;elsesnd_device = SND_DEVICE_OUT_VOICE_HANDSET; + /*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ + if(adev->hac_enable == true) + { + ALOGE("fuhua --- adev->hac_enable == true"); + snd_device = SND_DEVICE_OUT_VOICE_HANDSET_HAC; + } + else + { + ALOGE("fuhua --- adev->hac_enable == false or not get value"); + snd_device = SND_DEVICE_OUT_VOICE_HANDSET_HAC; + } + /*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */} else if (devices & AUDIO_DEVICE_OUT_TELEPHONY_TX)snd_device = SND_DEVICE_OUT_VOICE_TX;diff --git a/hal/msm8916/platform.h b/hal/msm8916/platform.h index f37819d..e0dbcfa 100644 --- a/hal/msm8916/platform.h +++ b/hal/msm8916/platform.h @@ -150,6 +150,9 @@ enum {SND_DEVICE_OUT_VOIP_SPEAKER,SND_DEVICE_OUT_VOIP_HEADPHONES, #endif + /*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ + SND_DEVICE_OUT_VOICE_HANDSET_HAC, + /*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */SND_DEVICE_OUT_VOICE_SPEAKER_AND_VOICE_HEADPHONES,SND_DEVICE_OUT_VOICE_SPEAKER_AND_VOICE_ANC_HEADSET,SND_DEVICE_OUT_VOICE_SPEAKER_STEREO_AND_VOICE_HEADPHONES, @@ -292,8 +295,10 @@ enum { #define MIXER_PATH_MAX_LENGTH 100 #define SND_CARD_MAX_LENGTH 100 #define CODEC_VERSION_MAX_LENGTH 100 - -#define MAX_VOL_INDEX 5 +/*begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ +//#define MAX_VOL_INDEX 5 +#define MAX_VOL_INDEX 7 +/*end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750 */ #define MIN_VOL_INDEX 0 #define percent_to_index(val, min, max) \((val) * ((max) - (min)) * 0.01 + (min) + .5)

e

完成audio_test.sh中添加開關。實際上只要打通了 HAC_PA 的path，剩下的都不難了吧。

###################### receiver playback test ###################### if [ $1 == 'handset' ];then # echo $$ >> /data/audio_test_receiver.pid # echo 'log log ' >> /sdcard/log.txt # setprop "tinyplay_status" "on"tinymix_v2 'PRI_MI2S_RX Audio Mixer MultiMedia1' '1'tinymix_v2 'RX1 MIX1 INP1' 'RX1'tinymix_v2 "RDAC2 MUX" 'RX1'tinymix_v2 'RX1 Digital Volume' '84'tinymix_v2 "EAR PA Gain" "POS_6_DB"tinymix_v2 "EAR_S" 'Switch'#begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750tinymix_v2 "HAC_PA" 'On'#end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750while [ "1" == "1" ]dotinyplay_v2 /system/etc/112.wav -d 0done fiif [ $1 == 'handset-stop' ];then # setprop "tinyplay_status" "off" # if [ -f /data/audio_test_receiver.pid ];then # pid=`cat /data/audio_test_receiver.pid` # kill -9 $pid # rm /data/audio_test_receiver.pid # fi#begin mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750tinymix_v2 "HAC_PA" 'Off'#end mod by fuhua for task: 8668750 on 2019-12-03 task id :8668750tinymix_v2 'RX1 MIX1 INP1' '0'tinymix_v2 "RDAC2 MUX" 'ZERO'tinymix_v2 'RX1 Digital Volume' '67'tinymix_v2 "EAR PA Gain" 'POS_1P5_DB'tinymix_v2 "EAR_S" 'ZERO'tinymix_v2 'PRI_MI2S_RX Audio Mixer MultiMedia1' '0' fi

結語

那么至此，整個hac器件的bring up就告一段落了，剩下的可能是一些維護工作？
我在自己調試的時候發現，單單的沒有tinymix_v2 "EAR PA Gain" "POS_6_DB"增益的設置，打電話的時候是不會出聲的，向硬件同事請教，說是由于電信號轉磁信號效率低，而hac器件還得從磁信號又轉一遍電信號，那更低了；而電信號轉機械信號效率相對較高，即Receiver能出聲而hac器件不能出聲的道理。

期間，發現hac器件噪聲嚴重，由于布局的原因，加上屏幕的干擾，實際上是有干擾的，背光的信號頻率很高。

總結

以上是生活随笔為你收集整理的Android - Audio - Qcom平台 - hac器件bring up的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。

上一篇：博士申请 | 美国范德堡大学NDS实验室
下一篇：腾讯企业邮箱单点登录 php,腾讯企业邮