技术标签： 移植
有人移植过WM8978的音频吗？求指教啊~~~~~~~~~~~~~~~~~~~~~~~~~~
设备树：
MX8MM_IOMUXC_SAI3_RXD_SAI3_RX_DATA0 0xd6
驱动：
sound/soc/soc-pcm.c
sound/soc/codecs/wm8978.c
sound/soc/fsl/imx-ak5558.c
kernel-source/include/sound/soc.h 包括snd_soc头文件定义
snd_soc_codec *codec
snd_soc_codec_get_drvdata(codec)
soc_dai_hw_params
devm_snd_soc_register_card
imx-wm8962.c
hpjack_status_check;// 相当于耳机插拔的中断回调函数。
snd_soc_jack_add_gpios(&imx_hp_jack, 1, &imx_hp_jack_gpio);//耳机插拔的中断操作，实际上是在这个函数里进行的。
ASoC有把Platform驱动分为两个部分：snd_soc_platform_driver和snd_soc_dai_driver。其中，platform_driver负责管理音频数据，把音频数据通过dma或其他操作传送至cpu dai中，dai_driver则主要完成cpu一侧的dai的参数配置，同时也会通过一定的途径把必要的dma等参数与snd_soc_platform_driver进行交互。
（1）ALSA是Advanced Linux Sound Architecture 高级音频架构
（2）PCM是英文Pulse-code modulation 脉冲编码调制
（3）ASoC--ALSA System on Chip： 建立在标准ALSA驱动层上，为了更好地支持嵌入式处理器和移动设备 中的音频Codec的一套软件体系。
①Machine 是指某一款机器
②Platform 一般是指某一个SoC平台
③Codec 字面上的意思就是编解码器
更多https://www.cnblogs.com/blogs-of-lxl/p/6538769.html
platform driver（i2c）的name要和前面 snd_soc_dai_link 结构中定义的codec_name相同
356 static struct platform_driver imx_ak5558_driver = {
357 .driver = {
358 .name = "imx-ak5558",
359 .pm = &snd_soc_pm_ops,
360 .of_match_table = imx_ak5558_dt_ids,
361 },
362 .probe = imx_ak5558_probe,
Codec：
两个重要的结构体snd_soc_dai_driver与snd_soc_codec_driver。
snd_soc_dai_driver主要用来描述codec的数据传输接口：
static const struct snd_soc_dai_ops rt5651_aif_dai_ops = {
.hw_params = rt5651_hw_params,
.set_fmt = rt5651_set_dai_fmt,
.set_sysclk = rt5651_set_dai_sysclk,
.set_pll = rt5651_set_dai_pll,
};
static struct snd_soc_dai_driver rt5651_dai[] = {
{
.name = "rt5651-aif1",
.id = RT5651_AIF1,
.playback = {//代表输出通道1
.stream_name = "AIF1 Playback",
.channels_min = 1,
.channels_max = 2,
.rates = RT5651_STEREO_RATES,//代表波特率
.formats = RT5651_FORMATS,//
},
.capture = {//代表输入通道1
.stream_name = "AIF1 Capture",
.channels_min = 1,
.channels_max = 2,
.rates = RT5651_STEREO_RATES,//代表波特率
.formats = RT5651_FORMATS,//数据格式
},
.ops = &rt5651_aif_dai_ops,/*主要用于设置硬件的参数*/
},
snd_soc_codec_driver 用来描述控制接口：
static struct snd_soc_codec_driver soc_codec_dev_rt5651 = {
.probe = rt5651_probe,
.suspend = rt5651_suspend,
.resume = rt5651_resume,
.set_bias_level = rt5651_set_bias_level,
.idle_bias_off = true,
.controls = rt5651_snd_controls,
.num_controls = ARRAY_SIZE(rt5651_snd_controls),
.dapm_widgets = rt5651_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(rt5651_dapm_widgets),
.dapm_routes = rt5651_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(rt5651_dapm_routes),
};
snd_soc_codec_driver 其主要提供了读写编解码寄存器的函数。在snd_soc_dai_driver 结构体中的.ops = &rt5651_aif_dai_ops中的操作，肯定需要使用snd_soc_codec_driver soc_codec_dev_rt5651中的一些读写函数。
platform：
目录;kernel/sound/soc/soc-core.c
ASoC又把Platform驱动分为两个部分：snd_soc_platform_driver和snd_soc_dai_driver。
snd_soc_dai_driver
static const struct snd_soc_dai_ops rockchip_i2s_dai_ops = {
/*设置参数*/
.hw_params = rockchip_i2s_hw_params,
.set_sysclk = rockchip_i2s_set_sysclk,
.set_fmt = rockchip_i2s_set_fmt,
/*启动数据传输*/
.trigger = rockchip_i2s_trigger,
};
static struct snd_soc_dai_driver rockchip_i2s_dai = {
.probe = rockchip_i2s_dai_probe,
.playback = {
.stream_name = "Playback",//名字
.channels_min = 2, //参数
.channels_max = 8,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = (SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE),
},
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = (SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE),
},
.ops = &rockchip_i2s_dai_ops,
};
static int rockchip_i2s_probe(struct platform_device *pdev)
ret = devm_snd_soc_register_component(&pdev->dev,&rockchip_i2s_component,soc_dai, 1);
snd_soc_platform_driver
static const struct snd_pcm_ops dmaengine_mpcm_ops = {
.open = dmaengine_mpcm_open,
.close = dmaengine_mpcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = dmaengine_mpcm_hw_params,
.hw_free = snd_pcm_lib_free_pages,
.trigger = snd_dmaengine_mpcm_trigger,
.pointer = dmaengine_mpcm_pointer,
};
static const struct snd_soc_platform_driver dmaengine_mpcm_platform = {
.component_driver = {
.probe_order = SND_SOC_COMP_ORDER_LATE,
},
.ops = &dmaengine_mpcm_ops,
.pcm_new = dmaengine_mpcm_new,
};
int snd_dmaengine_mpcm_register(struct rk_mdais_dev *mdais)
ret = snd_soc_add_platform(dev, &pcm->platform,&dmaengine_mpcm_platform);
Machine部分：
snd_soc_card rockchip_sound_card结构体，snd_soc_card结构体中又包含了dai_link成员。dai_link中的.codec_dai_name = "rt5651-aif1"必须与codec中的snd_soc_dai_driver rt5651_dai的.name = "rt5651-aif1"对应。
static struct snd_soc_ops rockchip_sound_rt5651_hifi_ops = {
.hw_params = rockchip_rt5651_hw_params,
};
static struct rockchip_dailinks[] = {
[DAILINK_RT5651_HIFI] = {
.name = "RT5651 HIFI",
.stream_name = "RT5651 PCM",
.codec_dai_name = "rt5651-aif1",
.ops = &rockchip_sound_rt5651_hifi_ops,
/* set rt5651 as slave */
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
},
[DAILINK_RT5651_VOICE] = {
.name = "RT5651 HDMIIN",
.stream_name = "RT5651 PCM",
.codec_dai_name = "rt5651-aif2",
.ops = &rockchip_sound_rt5651_voice_ops,
/* set rt5651 as slave */
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
},
[DAILINK_TC358749_HDMIIN] = {
.name = "TC358749 HDMIIN",
.stream_name = "TC358749 PCM",
.codec_dai_name = "tc358749x-audio",
},
};
static struct snd_soc_card rockchip_sound_card = {
.name = "realtekrt5651codec_hdmiin",
.owner = THIS_MODULE,
.dai_link = rockchip_dailinks,
.num_links = ARRAY_SIZE(rockchip_dailinks),
.dapm_widgets = rockchip_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(rockchip_dapm_widgets),
.dapm_routes = rockchip_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(rockchip_dapm_routes),
.controls = rockchip_controls,
.num_controls = ARRAY_SIZE(rockchip_controls),
};
static int rockchip_sound_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = &rockchip_sound_card;
/*以"rockchip,cpu"为参数，使用of_parse_phandle获取I2S adapter的device node*/
cpu_node = of_parse_phandle(pdev->dev.of_node, "rockchip,cpu", 0);
/*machine驱动负责platform与code之间的耦合*/
for (i = 0; i < DAILINK_ENTITIES; i++) {
/*决定使用哪个平台*/
rockchip_dailinks[i].platform_of_node = cpu_node;
/**/
rockchip_dailinks[i].cpu_of_node = cpu_node;
/*以"rockchip,codec"为参数，使用of_parse_phandle获取sound codec的device node*/
/*决定使用哪个编解码芯片*/
rockchip_dailinks[i].codec_of_node =
of_parse_phandle(pdev->dev.of_node,
"rockchip,codec", i);
if (!rockchip_dailinks[i].codec_of_node) {
dev_err(&pdev->dev,
"Property[%d] 'rockchip,codec' failed\n", i);
return -EINVAL;
}
}
card->dev = &pdev->dev;
platform_set_drvdata(pdev, card);
ret = devm_snd_soc_register_card(&pdev->dev, card);
if (ret)
dev_err(&pdev->dev, "%s register card failed %d\n",
__func__, ret);
dev_info(&pdev->dev, "snd_soc_register_card successful\n");
return ret;
}
最后我们可以看到其调用了devm_snd_soc_register_card，把进行注册：
int devm_snd_soc_register_card(struct device *dev, struct snd_soc_card *card)
ret = snd_soc_register_card(card);
/*在该函数内，会做很多工作，如绑定dai等等*/
ret = snd_soc_instantiate_card(card);
/*绑定完成之后创建一个声卡，此时没有生成设备节点*/
ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,card->owner, 0, &card->snd_card);
/*调用snd_card_register注册之后，生成设备节点*/
ret = snd_card_register(card->snd_card);
ASoC框架分三个部分：
a. platform（用来描述芯片的DAI[音频数字]接口、负责数据传输）
DAI：snd_soc_dai_driver
用来表示支持哪些格式数据
提供设置格式的函数
启动数据传输
数据传输：snd_soc_platform_driver
b. codec （用来描述音频编解码芯片，2部分：DAI接口、控制接口）
DAI：snd_soc_dai_driver
用来表示支持哪些格式数据
提供设置格式的函数
控制接口：snd_soc_codec_driver
c. machine（snd_cod_card,snd_soc_dai_link）
用来确定使用哪一个platform，哪一个codec芯片
可能会注册一个名为“soc-audio”的平台设备
导致soc-core.c中的soc_probe函数被调用
进而分配/设置/注册 snd_card
设备树：
rt5651-sound {
status = "okay";
compatible = "simple-audio-card";
/*指定声卡传输数据格式，是通过"i2s"*/
simple-audio-card,format = "i2s";
/*声卡的名字为realtek,rt5651-codec，可以通过*/
simple-audio-card,name = "realtek,rt5651-codec";
/*猜测是混合声音的时钟信号*/
simple-audio-card,mclk-fs = <256>;
/*声音的部件，麦克风，耳机等等*/
simple-audio-card,widgets =
"Microphone", "Mic Jack",
"Headphone", "Headphone Jack";
/*/*声音的部件，第一个指定的是接收器，第二个指定的是接收员*/*/
simple-audio-card,routing =
"Mic Jack", "MICBIAS1",
"IN1P", "Mic Jack",
"Headphone Jack", "HPOL",
"Headphone Jack", "HPOR";
/*根据我们的原理图，可以知道，传输数据的i2s为i2s0*/
simple-audio-card,cpu {
sound-dai = <&i2s0>;
};
/*rt5651为我们编码器的节点*/
simple-audio-card,codec {
sound-dai = <&rt5651>;
};
};
&i2c1 {
status = "okay";
i2c-scl-rising-time-ns = <300>;
i2c-scl-falling-time-ns = <15>;
/*编码器节点*/
rt5651: rt5651@1a {
status = "okay";
#sound-dai-cells = <0>;
compatible = "rockchip,rt5651";
reg = <0x1a>;
clocks = <&cru SCLK_I2S_8CH_OUT>;
clock-names = "mclk";
pinctrl-names = "default";
pinctrl-0 = <&i2s_8ch_mclk>;
/*扬声器使能引脚*/
spk-con-gpio = <&gpio0 11 GPIO_ACTIVE_HIGH>;
/*监测是否有耳机插入*/
hp-det-gpio = <&gpio4 28 GPIO_ACTIVE_LOW>;
};
};
route包括3个部分：sink（获得数据）,kontrol（控制寄存器）,source（发出数据）
codec的输入输出引脚：
snd_soc_dapm_output
snd_soc_dapm_input
外接的音频设备：
snd_soc_dapm_hp
snd_soc_dapm_spk
snd_soc_dapm_line
音频流（stream domain）：
snd_soc_dapm_adc
snd_soc_dapm_dac
snd_soc_dapm_aif_out
snd_soc_dapm_aif_in
snd_soc_dapm_dai_out
snd_soc_dapm_dai_in
电源、时钟和其它：
snd_soc_dapm_supply
snd_soc_dapm_regulator_supply
snd_soc_dapm_clock_supply
snd_soc_dapm_kcontrol
————————————————
版权声明：本文为CSDN博主「DroidPhone」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/DroidPhone/article/details/13756651
其他链接
https://blog.csdn.net/DroidPhone/article/details/14548631
https://blog.csdn.net/weixin_43013761/article/details/89385135
应用：
设置声音 amixer scontrols
amixer set Headphone 100%
root@imx8mmevk:~# gplay-1.0 1.mp4
FSL_GPLAY2_01.00_LINUX build on Mar 22 2019 14:48:45
====== AIUR: 4.4.5 build on Mar 22 2019 14:48:23. ======
Core: MPEG4PARSER_06.16.01 build on Dec 11 2018 03:04:17
file: /usr/lib/imx-mm/parser/lib_mp4_parser_arm_elinux.so.3.2
------------------------
Track 00 [video_0] Enabled
Duration: 0:00:02.600000000
Language: eng
Mime:
video/x-h264, parsed=(boolean)true, alignment=(string)au, stream-format=(string)avc, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, codec_data=(buffer)01640028ffe1003567640028acdb01e0089f97ff000100014a020202800001f4000061a870400007270e0003dcc57bdc1820000393870001ee62bdee0501000468ea43cb
------------------------
====== VPUDEC: 4.4.5 build on Mar 22 2019 14:48:36. ======
wrapper: 3.0.0 (VPUWRAPPER_ARM64_LINUX Build on Feb 21 2019 21:16:17)
vpulib: 1.1.1
firmware: 1.1.1.65535
------------------------
Track 01 [audio_0] Enabled
Duration: 0:00:02.581333000
Language: eng
Mime:
audio/mpeg, mpegversion=(int)4, channels=(int)2, rate=(int)48000, bitrate=(int)192000, stream-format=(string)raw, codec_data=(buffer)1190
------------------------
8524
[ 139.446610] alloc_contig_range: [780b0, 780c0) PFNs busy
[ 139.633627] alloc_contig_range: [780b0, 780c0) PFNs busy
[ 139.640759] cjf wm8978 hw params 1
[ 139.644365] cjf wm8978 hw params 2
[ 139.647955] cjf wm8978 hw params 3.1
[ 139.651654] cjf wm8978 hw params 3.2
[ 139.655454] wm8978 1-001a: ASoC: can't set wm8978-hifi hw params: -22
[ 139.661950] cjf wm8978 mute 1
[ 139.665219] cjf wm8978 mute ok
[ 139.668444] cjf wm8978 hw params 1
[ 139.671961] cjf wm8978 hw params 2
[ 139.675473] cjf wm8978 hw params 3.1
[ 139.679184] cjf wm8978 hw params 3.2
[ 139.682876] wm8978 1-001a: ASoC: can't set wm8978-hifi hw params: -22
[ 139.689411] cjf wm8978 mute 1
[ 139.692428] cjf wm8978 mute ok
[ 139.695598] cjf wm8978 hw params 1
[ 139.699115] cjf wm8978 hw params 2
[ 139.702624] cjf wm8978 hw params 3.1
[ 139.706302] cjf wm8978 hw params 3.2
[ 139.710019] wm8978 1-001a: ASoC: can't set wm8978-hifi hw params: -22
8962：
[ 128.118107] alloc_contig_range: [780b0, 780c0) PFNs busy
[ 128.303987] alloc_contig_range: [780b0, 780c0) PFNs busy
[ 128.311256] cjf wm8978 set dai fmt 1
[ 128.315627] cjf wm8978 set dai fmt ok 1
[ 128.319607] imx-wm8962 sound: failed to start FLL: -22
[ 128.324840] imx-wm8962 sound: cjf ASoC: machine hw_params failed: -22
[ 128.331354] cjf wm8978 dai sysclk 1 0, 0 ,0
[ 128.335575] cjf wm8978 dai ok0
[ 128.338657] imx-wm8962 sound: failed to stop FLL: -22
[ 128.343831] cjf wm8978 set dai fmt 1
[ 128.348101] cjf wm8978 set dai fmt ok 1
[ 128.352069] imx-wm8962 sound: failed to start FLL: -22
[ 128.357233] imx-wm8962 sound: cjf ASoC: machine hw_params failed: -22
root@imx8mmevk:~# dmesg | grep wm
[ 4.450267] cjf i2c wm8978 probe 1
[ 4.454048] cjf i2c wm8978 probe ok
[ 4.498024] cjf wm8962 probe 1
[ 4.501290] cjf wm8978 probe 2
[ 4.507151] cjf wm8978 probe ok
[ 4.510504] cjf wm8978 set dai fmt 1
[ 4.514713] cjf wm8978 set dai fmt ok 1
[ 4.518744] imx-wm8962 sound: wm8962 <-> 30030000.sai mapping ok
[ 4.524781] imx-wm8962 sound: ASoC: no source widget found for HPOUTL
[ 4.531258] imx-wm8962 sound: ASoC: Failed to add route HPOUTL -> direct -> Headphone Jack
[ 4.539538] imx-wm8962 sound: ASoC: no source widget found for HPOUTR
[ 4.545989] imx-wm8962 sound: ASoC: Failed to add route HPOUTR -> direct -> Headphone Jack
[ 4.554268] imx-wm8962 sound: ASoC: no source widget found for SPKOUTL
[ 4.560805] imx-wm8962 sound: ASoC: Failed to add route SPKOUTL -> direct -> Ext Spk
[ 4.568564] imx-wm8962 sound: ASoC: no source widget found for SPKOUTR
[ 4.575103] imx-wm8962 sound: ASoC: Failed to add route SPKOUTR -> direct -> Ext Spk
[ 4.582858] imx-wm8962 sound: ASoC: no source widget found for MICBIAS
[ 4.589396] imx-wm8962 sound: ASoC: Failed to add route MICBIAS -> direct -> AMIC
[ 4.596889] imx-wm8962 sound: ASoC: no sink widget found for IN3R
[ 4.602993] imx-wm8962 sound: ASoC: Failed to add route AMIC -> direct -> IN3R
[ 4.610226] imx-wm8962 sound: ASoC: no source widget found for MICBIAS
[ 4.616764] imx-wm8962 sound: ASoC: Failed to add route MICBIAS -> direct -> DMIC
[ 4.624257] imx-wm8962 sound: ASoC: no sink widget found for DMICDAT
[ 4.630622] imx-wm8962 sound: ASoC: Failed to add route DMIC -> direct -> DMICDAT
[ 4.638117] imx-wm8962 sound: ASoC: no source widget found for ASRC-Playback
[ 4.645175] imx-wm8962 sound: ASoC: Failed to add route ASRC-Playback -> direct -> CPU-Playback
[ 4.653887] imx-wm8962 sound: ASoC: no sink widget found for ASRC-Capture
[ 4.660685] imx-wm8962 sound: ASoC: Failed to add route CPU-Capture -> direct -> ASRC-Capture
[ 4.669223] imx-wm8962 sound: ASoC: no DMI vendor name!
[ 4.674460] cjf wm8978 dai sysclk 1 0, 24576000 ,24576000
[ 4.679866] cjf wm8978 dai 0
[ 4.682755] cjf wm8978 dai 110
[ 4.685818] cjf wm8978 dai ok0
[ 4.689136] cjf wm8978 set bias level 1
[ 4.794821] cjf wm8962 probe ok
[ 5.150845] #0: wm8962-audio
root@imx8mmevk:~# dmesg | grep cjf
[ 4.396688] cjf i2c ak4458 probe 1
[ 4.411668] cjf i2c ak4458 probe 1
[ 4.450267] cjf i2c wm8978 probe 1
[ 4.454048] cjf i2c wm8978 probe ok
[ 4.498024] cjf wm8962 probe 1
[ 4.501290] cjf wm8978 probe 2
[ 4.507151] cjf wm8978 probe ok
[ 4.510504] cjf wm8978 set dai fmt 1
[ 4.514713] cjf wm8978 set dai fmt ok 1
[ 4.674460] cjf wm8978 dai sysclk 1 0, 24576000 ,24576000
[ 4.679866] cjf wm8978 dai 0
[ 4.682755] cjf wm8978 dai 110
[ 4.685818] cjf wm8978 dai ok0
[ 4.689136] cjf wm8978 set bias level 1
[ 4.794821] cjf wm8962 probe ok
[ 4.831265] cjf imx ak4458 1
[ 5.048266] cjf i2c ak4458 probe 1
[ 5.063259] cjf i2c ak4458 probe 1
[ 5.102013] cjf imx ak4458 1
[ 5.932847] cjf i2c ak4458 probe 1
[ 5.955957] cjf i2c ak4458 probe 1
[ 5.998805] cjf imx ak4458 1
分析：
root@imx8mmevk:~# dmesg | grep cjf
wm8962.c：
.compatible = "wlf,wm8978 ->
wm8978_i2c_probe
[ 4.450267] cjf i2c wm8978 probe 1
ret = snd_soc_register_codec(&i2c->dev,&soc_codec_dev_wm8978, &wm8978_dai,1);
snd_soc_codec_driver snd_soc_dai_driver
.name = "wm8962",
.playback = {.stream_name = "Playback",
.ops=(snd_soc_dai_ops)&wm8978_dai_ops,{
1021 .probe = wm8978_probe, .hw_params = wm8978_hw_params,
1022 .suspend = wm8978_suspend, .digital_mute = wm8978_mute,
1023 .resume = wm8978_resume, .set_fmt = wm8978_set_dai_fmt,
1024 .set_bias_level = wm8978_set_bias_level,.set_clkdiv = wm8978_set_dai_clkdiv,
1025 .set_sysclk = wm8978_set_dai_sysclk,}
1026 .component_driver = {
1027 .controls = wm8978_snd_controls,
1028 .num_controls = ARRAY_SIZE(wm8978_snd_controls),
1029 .dapm_widgets = wm8978_dapm_widgets,
1030 .num_dapm_widgets = ARRAY_SIZE(wm8978_dapm_widgets),
1031 .dapm_routes = wm8978_dapm_routes,
1032 .num_dapm_routes = ARRAY_SIZE(wm8978_dapm_routes),
1033 },
[ 4.454048] cjf i2c wm8978 probe ok
imx-wm8962.c：
imx_wm8962_probe
[ 4.498024] cjf wm8962 probe 1
data->dai[0].name = "HiFi";
data->dai[0].stream_name = "HiFi";
data->dai[0].codec_dai_name = "wm8962";
data->dai[0].cpu_dai_name = dev_name(&cpu_pdev->dev);
devm_snd_soc_register_card(&pdev->dev, &data->card);
wm8978.c里的soc_codec_dev_wm8978初始化,probe,suspend,resume,level
[ 4.501290] cjf wm8978 probe 2
[ 4.507151] cjf wm8978 probe ok
wm8978.c里的wm8978_dai开始初始化hw,mute,fmt,clkdiv,sysclk
[ 4.510504] cjf wm8978 set dai fmt 1
[ 4.514713] cjf wm8978 set dai fmt ok 1
一大堆初始化，imx-wm8962 sound
[ 4.536543] imx-wm8962 sound: wm8962 <-> 30030000.sai mapping ok
[ 4.542576] imx-wm8962 sound: ASoC: no source widget found for HPOUTL
[ 4.549054] imx-wm8962 sound: ASoC: Failed to add route HPOUTL -> direct -> Headphone Jack
[ 4.557334] imx-wm8962 sound: ASoC: no source widget found for HPOUTR
[ 4.563786] imx-wm8962 sound: ASoC: Failed to add route HPOUTR -> direct -> Headphone Jack
[ 4.687029] imx-wm8962 sound: ASoC: no DMI vendor name!
[ 4.674460] cjf wm8978 dai sysclk 1 0, 24576000 ,24576000
[ 4.679866] cjf wm8978 dai 0
[ 4.682755] cjf wm8978 dai 110
[ 4.685818] cjf wm8978 dai ok0
[ 4.689136] cjf wm8978 set bias level 1
imx-wm8962.c：结束
[ 4.794821] cjf wm8962 probe ok
------------------------
[ 5634.332342] alloc_contig_range: [780b0, 780c0) PFNs busy
[ 5634.516602] alloc_contig_range: [780b0, 780c0) PFNs busy
[ 5634.523735] cjf wm8978 set dai fmt 1
[ 5634.528226] cjf wm8978 set dai fmt ok 1
[ 5634.532190] imx-wm8962 sound: failed to start FLL: -22
[ 5634.537348] imx-wm8962 sound: cjf ASoC: machine hw_params failed: -22
[ 5634.543851] cjf wm8978 dai sysclk 1 0, 0 ,0
[ 5634.548086] cjf wm8978 dai ok0
[ 5634.551145] imx-wm8962 sound: failed to stop FLL: -22
-------------有时钟-----------
[ 42.899742] alloc_contig_range: [780b0, 780c0) PFNs busy
[ 43.084240] alloc_contig_range: [780b0, 780c0) PFNs busy
[ 43.091296] cjf wm8978 set dai fmt 1
[ 43.095697] cjf wm8978 set dai fmt ok 1
[ 43.099677] imx-wm8962 sound: cjf 1failed to start FLL: -22
[ 43.105280] imx-wm8962 sound: cjf ASoC: machine hw_params failed: -22
[ 43.111781] cjf wm8978 dai sysclk 1 0, 0 ,0
[ 43.116036] cjf wm8978 dai ok0
[ 43.119094] imx-wm8962 sound: failed to stop FLL: -22
amixer set Headphone 35
430 static struct snd_soc_ops imx_hifi_ops = {
431 .startup = imx_hifi_startup,
432 .hw_params = imx_hifi_hw_params,
433 .hw_free = imx_hifi_hw_free,
434 };
imx_hifi_hw_params
snd_soc_dai_set_pll
snd_soc_dai_set_fmt() 实际上会调用snd_soc_dai_ops或者codec driver中的set_fmt回调；
snd_soc_dai_set_pll() 实际上会调用 snd_soc_dai_ops 或者codec driver 中的 set_pll 回调；
8962.c
static const struct snd_soc_dai_ops wm8962_dai_ops = {
.hw_params = wm8962_hw_params,
.set_sysclk = wm8962_set_dai_sysclk,
.set_fmt = wm8962_set_dai_fmt,
.digital_mute = wm8962_mute,
};
static struct snd_soc_dai_driver wm8962_dai = {
.name = "wm8962",
.playback = {
.stream_name = "Playback",
},
.capture = {
.stream_name = "Capture",
},
.ops = &wm8962_dai_ops,
static const struct snd_soc_codec_driver soc_codec_dev_wm8962 = {
.probe = wm8962_probe,
.remove = wm8962_remove,
.set_bias_level = wm8962_set_bias_level,
.set_pll = wm8962_set_fll,
snd_soc_dai_set_sysclk() 实际上会调用snd_soc_dai_ops或者codec driver中的set_sysclk回调；
snd_soc_dai_set_clkdiv() 实际上会调用snd_soc_dai_ops或者codec driver中的set_clkdiv回调；
o Headphone Jack 耳机插孔
o Internal Speaker 内部扬声器
o Internal Mic 内部麦克风
o Mic Jack 麦克风插孔
o Codec Pins Codec引脚
https://blog.csdn.net/wangyijieonline/article/details/88179309 更多请看
文章浏览阅读290次，点赞8次，收藏10次。1.背景介绍稀疏编码是一种用于处理稀疏数据的编码技术，其主要应用于信息传输、存储和处理等领域。稀疏数据是指数据中大部分元素为零或近似于零的数据，例如文本、图像、音频、视频等。稀疏编码的核心思想是将稀疏数据表示为非零元素和它们对应的位置信息，从而减少存储空间和计算复杂度。稀疏编码的研究起源于1990年代，随着大数据时代的到来，稀疏编码技术的应用范围和影响力不断扩大。目前，稀疏编码已经成为计算...
文章浏览阅读217次。EasyGBS - GB28181 国标方案安装使用文档下载安装包下载，正式使用需商业授权, 功能一致在线演示在线API架构图EasySIPCMSSIP 中心信令服务, 单节点, 自带一个 Redis Server, 随 EasySIPCMS 自启动, 不需要手动运行EasySIPSMSSIP 流媒体服务, 根..._easygbs-windows-2.6.0-23042316使用文档
文章浏览阅读1.2k次，点赞27次，收藏7次。2023巅峰极客 BabyURL之前AliyunCTF Bypassit I这题考查了这样一条链子：其实就是Jackson的原生反序列化利用今天复现的这题也是大同小异，一起来整一下。_原生jackson 反序列化链子
文章浏览阅读734次，点赞9次，收藏7次。微服务架构简单的说就是将单体应用进一步拆分，拆分成更小的服务，每个服务都是一个可以独立运行的项目。这么多小服务，如何管理他们？(服务治理 注册中心[服务注册 发现 剔除])这么多小服务，他们之间如何通讯？这么多小服务，客户端怎么访问他们？(网关)这么多小服务，一旦出现问题了，应该如何自处理？(容错)这么多小服务，一旦出现问题了，应该如何排错?(链路追踪)对于上面的问题，是任何一个微服务设计者都不能绕过去的，因此大部分的微服务产品都针对每一个问题提供了相应的组件来解决它们。_spring cloud
文章浏览阅读5.9k次，点赞6次，收藏20次。Js实现图片点击切换与轮播图片点击切换<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title></title> <script type="text/ja..._点击图片进行轮播图切换
文章浏览阅读10w+次，点赞245次，收藏1.5k次。在开始安装前，如果你的电脑装过tensorflow，请先把他们卸载干净，包括依赖的包（tensorflow-estimator、tensorboard、tensorflow、keras-applications、keras-preprocessing），不然后续安装了tensorflow-gpu可能会出现找不到cuda的问题。cuda、cudnn。..._tensorflow gpu版本安装
文章浏览阅读243次。0x00 简介权限滥用漏洞一般归类于逻辑问题，是指服务端功能开放过多或权限限制不严格，导致攻击者可以通过直接或间接调用的方式达到攻击效果。随着物联网时代的到来，这种漏洞已经屡见不鲜，各种漏洞组合利用也是千奇百怪、五花八门，这里总结漏洞是为了更好地应对和预防，如有不妥之处还请业内人士多多指教。0x01 背景2014年4月，在比特币飞涨的时代某网站曾经..._使用物联网漏洞的使用者
文章浏览阅读786次。A. Epipolar geometry and triangulationThe epipolar geometry mainly adopts the feature point method, such as SIFT, SURF and ORB, etc. to obtain the feature points corresponding to two frames of images. As shown in Figure 1, let the first image be and th_normalized plane coordinates
文章浏览阅读708次，点赞2次，收藏3次。开放信息抽取(OIE)系统（三）-- 第二代开放信息抽取系统(人工规则, rule-based, 先关系再实体)一.第二代开放信息抽取系统背景 第一代开放信息抽取系统(Open Information Extraction， OIE， learning-based, 自学习, 先抽取实体)通常抽取大量冗余信息，为了消除这些冗余信息，诞生了第二代开放信息抽取系统。二.第二代开放信息抽取系统历史第二代开放信息抽取系统着眼于解决第一代系统的三大问题: 大量非信息性提取（即省略关键信息的提取）、_语义角色增强的关系抽取
文章浏览阅读1.1w次，点赞6次，收藏51次。快速完成网页设计,10个顶尖响应式HTML5网页模板助你一臂之力为了寻找一个优质的网页模板，网页设计师和开发者往往可能会花上大半天的时间。不过幸运的是，现在的网页设计师和开发人员已经开始共享HTML5，Bootstrap和CSS3中的免费网页模板资源。鉴于网站模板的灵活性和强大的功能，现在广大设计师和开发者对html5网站的实际需求日益增长。为了造福大众，Mockplus的小伙伴整理了2018年最..._html欢迎页面
文章浏览阅读282次。原标题：2018全国计算机等级考试调整，一、二级都增加了考试科目全国计算机等级考试将于9月15-17日举行。在备考的最后冲刺阶段，小编为大家整理了今年新公布的全国计算机等级考试调整方案，希望对备考的小伙伴有所帮助，快随小编往下看吧！从2018年3月开始，全国计算机等级考试实施2018版考试大纲，并按新体系开考各个考试级别。具体调整内容如下：一、考试级别及科目1.一级新增“网络安全素质教育”科目(代..._计算机二级增报科目什么意思
文章浏览阅读240次。conan简单使用。_apt install conan