20250727讓飛凌OK3576-C開發板在Rockchip的原廠Android14下通過耳機播音
2025/7/27 23:28

緣起：很容易知道 飛凌OK3576-C開發板 使用的聲卡芯片是 NAU88C22YG
新唐科技(NUVOTON) NAU8822LYG NAU88C22YG 新唐立體聲音頻編解碼芯片

原理圖：OK3576-C V1.2_20240830.pdf
搜索：HP，耳機，很容易找到第16頁/總共21頁，

NAU88C22YG
IIC ADDRESS：0011010R/W
0x1A

1、使用【最接近】Rockchip的原廠Android14，KickPi 7的SDK。
DTS適應EVB1編譯，沒有聲音。

2、直接使用 飛凌OK3576-C開發板 的DTS。
Y:\OK3576-android-source\kernel-6.1\arch\arm64\boot\dts\rockchip\OK3576-C-android.dts
還是沒有聲音。

1|console:/sdcard #?
1|console:/sdcard # cat /proc/asound/cards
0 [rockchipnau8822]: rockchip-nau882 - rockchip-nau8822
rockchip-nau8822
1 [rockchipdp0 ? ?]: rockchip-dp0 - rockchip-dp0
rockchip-dp0
2 [rockchiphdmi ? ]: rockchip-hdmi - rockchip-hdmi
rockchip-hdmi
console:/sdcard #?
console:/sdcard # ls -l /dev/snd/
total 0
crw-rw---- 1 system audio 116, ? 4 2025-07-27 15:17 controlC0
crw-rw---- 1 system audio 116, ? 6 2025-07-27 15:17 controlC1
crw-rw---- 1 system audio 116, ? 9 2025-07-27 15:17 controlC2
crw-rw---- 1 system audio 116, ? 3 2025-07-27 15:17 pcmC0D0c
crw-rw---- 1 system audio 116, ? 2 2025-07-27 15:17 pcmC0D0p
crw-rw---- 1 system audio 116, ? 5 2025-07-27 15:17 pcmC1D0p
crw-rw---- 1 system audio 116, ? 8 2025-07-27 15:17 pcmC2D0c
crw-rw---- 1 system audio 116, ? 7 2025-07-27 15:17 pcmC2D0p
crw-rw---- 1 system audio 116, ?33 2025-07-27 15:17 timer
console:/sdcard #?
console:/sdcard # ll
total 52115
drwxrws--- 2 u0_a74 ? media_rw ? ? 3452 2025-07-27 15:17 Alarms
drwxrws--x 5 media_rw media_rw ? ? 3452 2025-07-27 15:17 Android
drwxrws--- 2 u0_a74 ? media_rw ? ? 3452 2025-07-27 15:17 Audiobooks
drwxrws--- 2 u0_a74 ? media_rw ? ? 3452 2025-07-27 15:17 DCIM
drwxrws--- 2 u0_a74 ? media_rw ? ? 3452 2025-07-27 15:17 Documents
drwxrws--- 2 u0_a74 ? media_rw ? ? 3452 2025-07-27 15:17 Download
drwxrws--- 3 u0_a74 ? media_rw ? ? 3452 2025-07-27 15:17 Movies
drwxrws--- 3 u0_a74 ? media_rw ? ? 3452 2025-07-27 15:17 Music
drwxrws--- 2 u0_a74 ? media_rw ? ? 3452 2025-07-27 15:17 Notifications
drwxrws--- 3 u0_a74 ? media_rw ? ? 3452 2025-07-27 15:17 Pictures
drwxrws--- 2 u0_a74 ? media_rw ? ? 3452 2025-07-27 15:17 Podcasts
drwxrws--- 2 u0_a74 ? media_rw ? ? 3452 2025-07-27 15:17 Recordings
drwxrws--- 2 u0_a74 ? media_rw ? ? 3452 2025-07-27 15:17 Ringtones
-rw-rw---- 1 u0_a74 ? media_rw 53268598 2025-07-27 12:45 kiss8.wav
console:/sdcard # tin
tinycap ? ? ?tinymix ? ? ?tinypcminfo ?tinyplay
console:/sdcard # tinyp ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
tinypcminfo ?tinyplay
console:/sdcard # tinyplay ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??
Usage: tinyplay file.wav [-D card] [-d device] [-p period_size] [-n n_periods]?
1|console:/sdcard #?
1|console:/sdcard # tin
tinycap ? ? ?tinymix ? ? ?tinypcminfo ?tinyplay
1|console:/sdcard # tinyplay kiss8.wav -D 0 -d 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??
Playing sample: 2 ch, 44100 hz, 16 bit 53268480 bytes

3、那就分析/比對內核/driver。
直接查找nau88c22*.c，找不到！
很容易/根據經驗/艱難得知驅動名是：nau8822.c

rootroot@rootroot-HP-ZHAN-66-Pro-A-14-G3:~/rk3576-android14.0-20250217$?
rootroot@rootroot-HP-ZHAN-66-Pro-A-14-G3:~/rk3576-android14.0-20250217$ cd kernel-6.1/
rootroot@rootroot-HP-ZHAN-66-Pro-A-14-G3:~/rk3576-android14.0-20250217/kernel-6.1$?
rootroot@rootroot-HP-ZHAN-66-Pro-A-14-G3:~/rk3576-android14.0-20250217/kernel-6.1$?
rootroot@rootroot-HP-ZHAN-66-Pro-A-14-G3:~/rk3576-android14.0-20250217/kernel-6.1$ find . -name nau88c22*.c
rootroot@rootroot-HP-ZHAN-66-Pro-A-14-G3:~/rk3576-android14.0-20250217/kernel-6.1$?
rootroot@rootroot-HP-ZHAN-66-Pro-A-14-G3:~/rk3576-android14.0-20250217/kernel-6.1$ find . -name nau8822*.c
./sound/soc/codecs/nau8822 - 副本.c
./sound/soc/codecs/nau8822.c
rootroot@rootroot-HP-ZHAN-66-Pro-A-14-G3:~/rk3576-android14.0-20250217/kernel-6.1$?
rootroot@rootroot-HP-ZHAN-66-Pro-A-14-G3:~/rk3576-android14.0-20250217/kernel-6.1$?

https://blog.csdn.net/qq_39104123/article/details/115752708?spm=1001.2101.3001.6650.2&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7EPaidSort-2-115752708-blog-143410504.235%5Ev43%5Epc_blog_bottom_relevance_base8&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7EPaidSort-2-115752708-blog-143410504.235%5Ev43%5Epc_blog_bottom_relevance_base8&utm_relevant_index=4
基于imx8mq的NAU8822音頻驅動開發
https://blog.csdn.net/qq_39104123/article/details/115752708

CSDN：NAU88C22YG 驅動名：nau8822.c

4、和 飛凌OK3576-C開發板 原廠的 內核/driver 進行比對，很容易知道 飛凌對 Rockchip的原廠Android14的SDK進行過魔改了！
修改之后，可以在命令行讓 tinyplay播放器通過耳機發生了。
但是在Android界面還是不能播音。還需要修正！

Y:\rk3576-android14.0-20250217\kernel-6.1\sound\soc\codecs\nau8822.h
Y:\OK3576-android-source\kernel-6.1\sound\soc\codecs\nau8822.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
* nau8822.h ?-- ?NAU8822 ALSA SoC Audio driver
*
* Copyright 2017 Nuvoton Technology Crop.
*
* Author: David Lin <ctlin0@nuvoton.com>
* Co-author: John Hsu <kchsu0@nuvoton.com>
* Co-author: Seven Li <wtli@nuvoton.com>
*/

#ifndef __NAU8822_H__
#define __NAU8822_H__
#include <linux/clk.h>

/* Codec Private Data */
struct nau8822 {
struct device *dev;
struct regmap *regmap;
int mclk_idx;
struct nau8822_pll pll;
int sysclk;
int div_id;
?? ?struct clk *clk;
};

Y:\rk3576-android14.0-20250217\kernel-6.1\sound\soc\codecs\nau8822.c
Y:\OK3576-android-source\kernel-6.1\sound\soc\codecs\nau8822.c

static int nau8822_i2c_probe(struct i2c_client *i2c)
{
struct device *dev = &i2c->dev;
struct nau8822 *nau8822 = dev_get_platdata(dev);
int ret;

?? ?if (!nau8822) {
nau8822 = devm_kzalloc(dev, sizeof(*nau8822), GFP_KERNEL);
if (nau8822 == NULL)
return -ENOMEM;
}
i2c_set_clientdata(i2c, nau8822);

?? ?/* Setup clocks */
nau8822->clk = devm_clk_get(&i2c->dev, NULL);
if (IS_ERR(nau8822->clk)) {
dev_err(&i2c->dev, "codec clock missing or invalid\n");
ret = PTR_ERR(nau8822->clk);
}

? ? ? ?ret = clk_prepare_enable(nau8822->clk);
if (ret) {
dev_err(&i2c->dev, "unable to prepare codec clk\n");
}

?? ?nau8822->regmap = devm_regmap_init_i2c(i2c, &nau8822_regmap_config);
if (IS_ERR(nau8822->regmap)) {
ret = PTR_ERR(nau8822->regmap);
dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
return ret;
}
nau8822->dev = dev;

?? ?/* Reset the codec */
ret = regmap_write(nau8822->regmap, NAU8822_REG_RESET, 0x00);
if (ret != 0) {
dev_err(&i2c->dev, "Failed to issue reset: %d\n", ret);
return ret;
}

?? ?ret = devm_snd_soc_register_component(dev, &soc_component_dev_nau8822,
&nau8822_dai, 1);
if (ret != 0) {
dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
return ret;
}

?? ?return 0;
}

【這里還需要進一步修正！】
Y:\OK3576-android-source\hardware\rockchip\audio\tinyalsa_hal\codec_config\config_list.h

參考資料：
聲卡

百度：RK3576 默認聲卡
Error: 'kiss8.mp3' is not a riff/wave file
tinyplay 制定聲卡
rk3588 nau8822
RK3588 nau8822
RK3576 NAU88C22YG
NAU88C22YG

BING：rk平臺怎么調試nau8822
rk3576 nau8822

CSDN：nau8822

https://www.nuvoton.com/resource-files/NAU8822DataSheetRev3.3.pdf

https://www.eeworld.com.cn/qrs/eic698427.html
基于RK3576開發板的聲卡資源介紹
aplay -l

https://blog.csdn.net/weixin_68294039/article/details/124248608?spm=1001.2101.3001.6650.2&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ECtr-2-124248608-blog-148433086.235%5Ev43%5Epc_blog_bottom_relevance_base8&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ECtr-2-124248608-blog-148433086.235%5Ev43%5Epc_blog_bottom_relevance_base8&utm_relevant_index=5
RK3566,ES7202聲卡驅動添加
https://blog.csdn.net/weixin_68294039/article/details/124248608

4.修改安卓hal層
在hardware/rockchip/audio/tinyalsa_hal/下的audio_hw.c,修改內容：

https://blog.csdn.net/lingzhou0909/article/details/148433086
RK3576 Android14 DMIC調制

使用tinycap工具來錄音，如下
tinycap /sdcard/rec.wav -D 1 -d 0 -c 2 -r 44100 -b 16 -p 1024 -n 3

https://blog.csdn.net/qq_38312843/article/details/124868449
RK聲卡調試

cat /proc/asound/cards
ls -l /dev/snd/
tinyplay /sdcard/test44.wav -D 0 -d 0 -p 1024 -n 3
hardware/rockchip/audio/tinyalsa_hal/codec_config/rt5640_config.h

【付費】
https://blog.csdn.net/radianceblau/article/details/64125411
linux驅動由淺入深系列：tinyalsa(tinymix/tinycap/tinyplay/tinypcminfo)音頻子系統之一

https://blog.csdn.net/lf12345678910/article/details/102497454
tinyplay 聲卡播放

https://blog.csdn.net/wenjin359/article/details/83006820
tinyalsa(tinymix/tinycap/tinyplay/tinypcminfo)

/dev/snd/pcmC*

vendor/brand/kernel/linaro/sound/core/init.c
snd_card_create
vendor/brand/kernel/linaro/sound/usb/card.c
snd_usb_audio_probe

root@:/ # cat proc/asound/cards ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
0 [No00 ? ? ? ? ? ]: brand ALSA Drv - brand MAD No.00
brand MPEG Audio Decoder No.00

root@:/ # tinypcminfo -D /proc/asound/cards
Info for card 0, device 0:
PCM out:

root@:/ # tinyplay mnt/usb/17EC-1152/file.wav -D 0 -d 2 -n 2
//tinyplay mnt/usb/17EC-1152/file.wav -D 0 -d 3 -n 2 ? ? ? ? ? ? ? ? ? ? ? ? ?

root@:/ # ls -al dev/snd/pcm* ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
crw-rw---- system ? audio ? ?116, ?24 2007-01-01 20:00 pcmC0D0c
crw-rw---- system ? audio ? ?116, ?16 2007-01-01 20:00 pcmC0D0p
crw-rw---- system ? audio ? ?116, ?25 2007-01-01 20:00 pcmC0D1c
crw-rw---- system ? audio ? ?116, ?17 2007-01-01 20:00 pcmC0D1p
crw-rw---- system ? audio ? ?116, ?18 2007-01-01 20:00 pcmC0D2p
crw-rw---- system ? audio ? ?116, ?19 2007-01-01 20:00 pcmC0D3p?

【付費】
https://wenku.csdn.net/answer/407dbnsft2
rk平臺怎么調試nau8822 - CSDN文庫.mhtml

https://blog.csdn.net/weixin_43245753/article/details/123915015
Rockchip RK3588 kernel dts解析之音頻模塊

https://bbs.16rd.com/thread-584429-1-1.html
[瑞芯微RK資料] 瑞芯微RK3328/RK3366/RK3368/RK3399平臺Audio開發指南

2.2.4 聲卡調試
1. 通過如下命令確認聲卡是否注冊成功
root@rk3366:/ # cat /proc/asound/cards
0 [rockchiprt5640c]: rockchip_rt5640 - rockchip,rt5640-codec
rockchip,rt5640-codec
root@rk3366:/ # ls -l /dev/snd/
crw-rw---- system audio 116, 2 2013-01-18 08:51 controlC0
crw-rw---- system audio 116, 4 2013-01-18 08:51 pcmC0D0c
crw-rw---- system audio 116, 3 2013-01-18 08:51 pcmC0D0p
2. 通過命令行播放錄制調試聲卡：
播放：一般播放 1khz 0db 正弦波，然后在 codec 輸出端示波器簡單測量是否失真，雜音，然后再使用音頻分析儀測試指標。
root@rk3366:/ # tinyplay
Usage: tinyplay file.wav [-D card] [-d device] [-p period_size] [-n n_periods]
|root@rk3366:/ # tinyplay /sdcard/test44.wav -D 0 -d 0 -p 1024 -n 3
Playing sample: 2 ch, 44100 hz, 32 bit
......

https://blog.csdn.net/2301_76587520/article/details/145768380?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_utm_term~default-8-145768380-blog-106573423.235^v43^pc_blog_bottom_relevance_base8&spm=1001.2101.3001.4242.5&utm_relevant_index=11
開發板適配之SAI i.MX6ULL NAU88C22【驅動driver + DTS】

SAI音頻接口只是傳輸音頻數據的數字接口，所以這些音頻編解碼的工作需要一個專有的編解碼芯片來完成，ELF 1使用的是NAU88C22芯片，NAU88C22可連接mic和揚聲器或耳機用于錄音和播放聲音。i.MX6ULL使用I2S總線與NAU88C22進行音頻數據的傳輸，I2S(Inter—IC Sound)總線，又稱集成電路內置音頻總線，是Philips公司為數字音頻設備之間的音頻數據傳輸而制定的一種總線標準，該總線專門用于音頻設備之間的數據傳輸，廣泛應用于各種多媒體系統。

https://www.elecfans.com/d/6382666.html
RK3588核心板多媒體功能一覽

先在EVM-RK3588底板接好MIC設備，再執行下面指令；采集聲音 10 秒，并且保存為 wav 格式。
$ arecord -D default:CARD=rockchipnau8822 -d 10 -f cd -t wav test1.wav

https://bbs.elecfans.com/jishu_2477148_1_1.html
[活動] 【ELF 2學習板試用】05 ASoC中的machine class