TI中文支持网Hi,TI社区员工：
1、目前使用TLV320AIC3254 codec, 在linux下环境下I2S接口，测试音频输出和输入功能，LOR LOL IN3L IN3R， 右声道的声音可以正常播放，和录音，但是左声道playback无输出，录音也无法录音，
2、现在MICBIAS使用内部供电输出AVDD, 但在驱动中设置了MICBIAS powerup状态，系统启动后，MICBIAS的电源使终为 down状态，即P1_R51使终为 0x20 而非0x60
下面是linux中驱动的寄存器设置, 关于播放和录音，我检查了DAC的电源，增益，声音大小，静音状态等等， 使用立体声的音频源使终只有右声道 有声音，左声道元输出
请问TI社工人员和其它网友， 可有思路！！！！！
谢谢！！！
static int aic32x4_probe(struct snd_soc_codec *codec)
{
struct aic32x4_priv *aic32x4 = snd_soc_codec_get_drvdata(codec);
u32 tmp_reg;
printk(KERN_ERR "aic32x4: =================probe===============1.1");
if (gpio_is_valid(aic32x4->rstn_gpio)) {
ndelay(10);
gpio_set_value(aic32x4->rstn_gpio, 1);
}
snd_soc_write(codec, AIC32X4_RESET, 0x01);
/* Power platform configuration */
//if (aic32x4->power_cfg & AIC32X4_PWR_MICBIAS_2075_LDOIN) {
snd_soc_write(codec, AIC32X4_MICBIAS, AIC32X4_MICBIAS_LDOIN |AIC32X4_MICBIAS_2075V);
//}
if (aic32x4->power_cfg & AIC32X4_PWR_AVDD_DVDD_WEAK_DISABLE)
snd_soc_write(codec, AIC32X4_PWRCFG, AIC32X4_AVDDWEAKDISABLE);
tmp_reg = (aic32x4->power_cfg & AIC32X4_PWR_AIC32X4_LDO_ENABLE) ?
AIC32X4_LDOCTLEN : 0;
snd_soc_write(codec, AIC32X4_LDOCTL, tmp_reg);
tmp_reg = snd_soc_read(codec, AIC32X4_CMMODE);
if (aic32x4->power_cfg & AIC32X4_PWR_CMMODE_LDOIN_RANGE_18_36)
tmp_reg |= AIC32X4_LDOIN_18_36;
if (aic32x4->power_cfg & AIC32X4_PWR_CMMODE_HP_LDOIN_POWERED)
tmp_reg |= AIC32X4_LDOIN2HP;
snd_soc_write(codec, AIC32X4_CMMODE, tmp_reg);
/* Mic PGA routing */
if (aic32x4->micpga_routing & AIC32X4_MICPGA_ROUTE_LMIC_IN2R_10K)
snd_soc_write(codec, AIC32X4_LMICPGANIN,
AIC32X4_LMICPGANIN_IN2R_10K);
else
snd_soc_write(codec, AIC32X4_LMICPGANIN,
AIC32X4_LMICPGANIN_CM1L_10K);
if (aic32x4->micpga_routing & AIC32X4_MICPGA_ROUTE_RMIC_IN1L_10K)
snd_soc_write(codec, AIC32X4_RMICPGANIN,
AIC32X4_RMICPGANIN_IN1L_10K);
else
snd_soc_write(codec, AIC32X4_RMICPGANIN,
AIC32X4_RMICPGANIN_CM1R_10K);
/** Workaround: for an unknown reason, the ADC needs to be powered up* and down for the first capture to work properly. It seems related to* a HW BUG or some kind of behavior not documented in the datasheet.*/
tmp_reg = snd_soc_read(codec, AIC32X4_ADCSETUP);
snd_soc_write(codec, AIC32X4_ADCSETUP, tmp_reg |
AIC32X4_LADC_EN | AIC32X4_RADC_EN);
snd_soc_write(codec, AIC32X4_ADCSETUP, tmp_reg);
#if 1 //crengby lee change 2019.2.20 from nvidia forums by igal
snd_soc_write(codec, AIC32X4_CLKMUX, 0x07);
snd_soc_write(codec, AIC32X4_PLLPR, 0x92);
snd_soc_write(codec, AIC32X4_PLLJ, 0x20);
snd_soc_write(codec, AIC32X4_PLLDMSB, 0x00);
snd_soc_write(codec, AIC32X4_PLLDLSB, 0x00);
snd_soc_write(codec, AIC32X4_NADC, 0x84);
snd_soc_write(codec, AIC32X4_MADC, 0x84);
snd_soc_write(codec, AIC32X4_AOSR, 0x80);
snd_soc_write(codec, AIC32X4_NDAC, 0x84);
snd_soc_write(codec, AIC32X4_MDAC, 0x84);
// set D-OSR to 128
snd_soc_write(codec, AIC32X4_DOSRMSB, 0x00);
snd_soc_write(codec, AIC32X4_DOSRLSB, 0x80);
snd_soc_write(codec, AIC32X4_DACSETUP, 0xD4);
snd_soc_write(codec, AIC32X4_LOLROUTE, 0x08); // 0x00 - no sound
snd_soc_write(codec, AIC32X4_LORROUTE, 0x08); // 0x00 - no sound
// IN3L is routed to Left MICPGA with 10k resistance
snd_soc_write(codec, AIC32X4_LMICPGAPIN, 0x04);
// CM is routed to Left MICPGA with 10k resistance
snd_soc_write(codec, AIC32X4_LMICPGANIN, 0x40);
// IN3R is routed to Right MICPGA with 10k resistance
snd_soc_write(codec, AIC32X4_RMICPGAPIN, 0x04);
// CM is routed to Right MICPGA with 10k resistance
snd_soc_write(codec, AIC32X4_RMICPGANIN, 0x40);
// Unmute Right MICPGA, Gain selection of 6dB to
// make channel gain 0dB, since 20K input
//impedance is used single ended
//w 30 3c 0c
snd_soc_write(codec, AIC32X4_LMICPGAVOL, 0x0c);
snd_soc_write(codec, AIC32X4_RMICPGAVOL, 0x0c);
// Powr up Left and Right ADC
snd_soc_write(codec, AIC32X4_ADCSETUP, 0xC0);
// Umute left and right ADC
snd_soc_write(codec, AIC32X4_ADCFGA, 0x00);
//snd_soc_write(codec, AIC32X4_IFACE3, 0x00);
// taken from scripts...
// Disable weak connection of AVDD with DVDD
snd_soc_write(codec, AIC32X4_PWRCFG, 0x08);
// Enable Master Analog Power Control
snd_soc_write(codec, AIC32X4_LDOCTL, 0x01); // 0x08 - disables audio
// powerup micbias avdd powerup micbias is 2V
//snd_soc_write(codec, AIC32X4_MICBIAS, 0x60);
// Set the REF charging time to 40ms
snd_soc_write(codec, 0xFB, 0x01);
// Input Common Mode
snd_soc_write(codec, AIC32X4_CMMODE, 0x00);
// Mute Mixer Amplifier Left & Right
snd_soc_write(codec, 0x98, 0x28); //p1_r18 p1_r19写入0x28好像是mute状态
snd_soc_write(codec, 0x99, 0x28);
snd_soc_write(codec, AIC32X4_OUTPWRCTL, 0x0C);
#endif
return 0;
}
user5962719：
mic使用单端接法非差分
Amy Luo：
您好，
AVDD使用的是内部供电还是外部供电？测一测AVDD电压正常吗
user5962719：
回复 Amy Luo:
你好，之前的问题已经解决了，现在出来一个新的问题
现像描述如下：
CPU为master3254为从机
现在的接法是左声道到地 ，右声道接mic,寄存器配置将右声道的声音分别配置到左右声道上，
16000Hz, 16bit, 2通道采样，使用arecord录音后， 声音播放正常 此时wclk=16Khzbclk=512Khz
16000Hz,16bit, 1通道采样，使用arecord录音后，声音播放快一倍，此时用示波器测试到 wclk=8000hz, bclk=512khz，在播放时如果调整回放速率到8000Hz 播放是正常的，但是用arecord录的wav文件的头部采样为16000Hz, 这好像不匹配，请问在3254如何设置，可以匹配播放速度？
我和同事讨论过认为单声道采样时，16000Hz,16bit, 1通道录音wclk=8000hz, bclk=512khz， 好像是对的
