TLV320ADC3140: TLV320ADC3140 arecord error on AM4377

Xing Ou

Part Number: TLV320ADC3140
Other Parts Discussed in Thread: AM4377, , AM4372

Hi TI team,

We have an AM4377 board MCASP0 connect to TLV320ADC3140, AM4377 is Slave and TLV320ADC3140 is Master, TLV320ADC3140 is configured as 8xDMIC.

we meet a problem is 'read error: Input/output error' when running 'arecord' command and test.wav has no data:

root@am437x-evm:~# arecord -Dhw:0,0 -c 8 -d 10 -r 48000 -f S32_LE test.wav
Recording WAVE 'test.wav' :
Signed 32 bit Little Endian, Rate 48000 Hz, Channels 8
arecord: pcm_read:2143: read error: Input/output error
root@am437x-evm:~#

Please help to check it, thanks.

here are some our information:

1. block diagram:

Block Diagram

2. TLV320ADC3140 driver source code download from:
git.kernel.org/.../codecs
/tlv320adcx140.c?h=v5.9.6
git.kernel.org/.../codecs
/tlv320adcx140.h?h=v5.9.6

3. SDK is:

ti-processor-sdk-linux-rt-am437x-evm-06.03.00.106 (linux-rt-4.19.94+gitAUTOINC+a242ccf3f1-ga242ccf3f1).

4. Audio-releted device tree config:
#include "am4372.dtsi"
clk_mcasp0_fixed: clk_mcasp0_fixed {
   #clock-cells = <0>;
   compatible = "fixed-clock";
   clock-frequency = <24576000>;
};
clk_mcasp0: clk_mcasp0 {
   #clock-cells = <0>;
   compatible = "gpio-gate-clock";
   clocks = <&clk_mcasp0_fixed>;
   enable-gpios = <&gpio4 13 GPIO_ACTIVE_HIGH>; /* Clk enable on GPIO4_13 */
};
sound {
   compatible = "simple-audio-card";
   simple-audio-card,name = "AM4377-Audio-Card";
   #sound-dai-cells = <0>;
   simple-audio-card,dai-link@0 {
       format = "dsp_b";
       bitclock-inversion;
       bitclock-master = <&sound0_master>;
       frame-master = <&sound0_master>;
       cpu {
           sound-dai = <&mcasp0>;
           dai-tdm-slot-num = <8>;
           dai-tdm-slot-width = <32>;
           dai-tdm-slot-tx-mask = <1 1 1 1 1 1 1 1>;
           dai-tdm-slot-rx-mask = <1 1 1 1 1 1 1 1>;
       };
       sound0_master: codec {
           sound-dai = <&tlv320adc3140>;
           clocks = <&clk_mcasp0>;
       };
   };
};
&i2c2 {
    tlv320adc3140: codecadc@4c {
        reg = <0x4c>;
    };
};

&tlv320adc3140 {
    status = "okay";
    #sound-dai-cells = <0>;
    compatible = "ti,tlv320adc3140";
    /* areg-supply = <&vsys_1v8>; */
    ti,mic-bias-source = <6>;
    ti,pdm-edge-select = <0 0 0 0>;
    /* GPI1 ~ GPI4 */
    ti,gpi-config = <4 5 6 7>;
    ti,gpio-config = <10 0>;
    ti,gpo-config-1 = <4 1>;
    ti,gpo-config-2 = <4 1>;
    ti,gpo-config-3 = <4 1>;
    ti,gpo-config-4 = <4 1>;
    ti,asi-tx-driver = <1>;
    reset-gpios = <&gpio4 12 GPIO_ACTIVE_HIGH>;
};
&mcasp0 {
    status = "okay";
    #sound-dai-cells = <0>;
    pinctrl-names = "default", "sleep";
    pinctrl-0 = <&mcasp0_pins_default>;
    pinctrl-1 = <&mcasp0_pins_sleep>;
    op-mode = <0>; /* MCASP_IIS_MODE */
    tdm-slots = <8>;
    /* 4 serializers ARX0, ARX1, ARX2, ARX3 */
    serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */
        2 0 0 0
    >;
    tx-num-evt = <32>;
    rx-num-evt = <32>;
};
&am43xx_pinmux {
    gpio4_pins: gpio4_pins_default {
        pinctrl-single,pins = <
            AM4372_IOPAD(0x9e0 , PIN_OUTPUT_PULLUP | MUX_MODE7) /* CAM1_FIELD.GPIO4_12 */
            AM4372_IOPAD(0x9e4 , PIN_OUTPUT_PULLUP | MUX_MODE7) /* cam1_wen.GPIO4_13 */
        >;
    };

    mcasp0_pins_default: mcasp0_pins_default {
        pinctrl-single,pins = <
            AM4372_IOPAD(0x99c, PIN_INPUT_PULLUP | MUX_MODE0 ) /* (M24) mcasp0_ahclkr.mcasp0_ahclkr*/
            AM4372_IOPAD(0x9ac, PIN_INPUT_PULLUP | MUX_MODE0 )    /* (N24) mcasp0_ahclkx.mcasp0_ahclkx */
            AM4372_IOPAD(0x998, PIN_INPUT_PULLUP | MUX_MODE0 ) /* (H23) mcasp0_axr0.mcasp0_axr0 */
            AM4372_IOPAD(0x9a8, PIN_INPUT_PULLUP | MUX_MODE0 ) /* (L24) mcasp0_axr1.mcasp0_axr1 */
            AM4372_IOPAD(0x994, PIN_OUTPUT_PULLUP | MUX_MODE0 )   /* (N22) mcasp0_fsx.mcasp0_fsx */
            AM4372_IOPAD(0x9a4, PIN_INPUT_PULLUP | MUX_MODE0 ) /* (N24) mcasp0_fsr.mcasp0_fsr */
            AM4372_IOPAD(0x990, PIN_OUTPUT_PULLDOWN | MUX_MODE0 ) /* (N24) mcasp0_aclkx.mcasp0_aclkx, */
            AM4372_IOPAD(0x9a0, PIN_INPUT_PULLUP | MUX_MODE0 ) /* (N22) mcasp0_aclkr.mcasp0_aclkr */
        >;
    };

    mcasp0_pins_sleep: mcasp0_pins_sleep {
        pinctrl-single,pins = <
            AM4372_IOPAD(0x99c, PIN_INPUT_PULLUP | MUX_MODE7 ) /* (M24) mcasp0_ahclkr.mcasp0_ahclkr*/
            AM4372_IOPAD(0x9ac, PIN_INPUT_PULLUP | MUX_MODE7 )    /* (N24) mcasp0_ahclkx.mcasp0_ahclkx */
            AM4372_IOPAD(0x998, PIN_INPUT_PULLUP | MUX_MODE7 ) /* (H23) mcasp0_axr0.mcasp0_axr0 */
            AM4372_IOPAD(0x9a8, PIN_INPUT_PULLUP | MUX_MODE7 ) /* (L24) mcasp0_axr1.mcasp0_axr1 */
            AM4372_IOPAD(0x994, PIN_OUTPUT_PULLUP | MUX_MODE7 )   /* (N22) mcasp0_fsx.mcasp0_fsx */
            AM4372_IOPAD(0x9a4, PIN_INPUT_PULLUP | MUX_MODE7 ) /* (N24) mcasp0_fsr.mcasp0_fsr */
            AM4372_IOPAD(0x990, PIN_OUTPUT_PULLDOWN | MUX_MODE7 ) /* (N24) mcasp0_aclkx.mcasp0_aclkx, */
            AM4372_IOPAD(0x9a0, PIN_INPUT_PULLUP | MUX_MODE7 ) /* (N22) mcasp0_aclkr.mcasp0_aclkr */
        >;
    };
};

5. I dumped TLV320ADC3140's all registers by i2cdump when running 'arecord' command and show them as below:

Regards,

Xing-Qin

over 4 years ago

0 Carson Allen over 4 years ago

TI__Genius 13610 points

Hi Xing-Qin

We dont really support code debugging but i will look at register dump in help to pinpoint the problem.

Best,

Carson

Low Power Audio Engineer

0 Xing Ou over 4 years ago in reply to Carson Allen

Prodigy 140 points

Hi Carson,

Thanks for your reply, here is the wave of TLV320ADC3140's DAI signal for you, it seems that ADC work normally but CPU can not record, please help to check it, thanks.

Best regards,

Xing-Qin

+1 Carson Allen over 4 years ago in reply to Xing Ou

TI__Genius 13610 points

If it is the processor is problem, you should post in that forum, but also verify clocks are being supplied properly from the ADC.

0 Xing Ou over 4 years ago in reply to Carson Allen

Prodigy 140 points

Hi Carson,

Sorry for my update so late, I have created a new thread about this issue in processor forum, if I have any questions, I will update here, thanks.

Regards,

Xin-Qin

0 Xing Ou over 4 years ago in reply to Xing Ou

Prodigy 140 points

Hi Carson,

After reworked our board as fallow block diagram:

Our problem have been solved.

But we meet anther problem as follow:

I used 'arecord' command to record 8 channels audio in Linux, I found that only 4 channels(ch1-ch4) in the output .wav file have data and the other 4 channels(ch5-ch8) are zero.

I dumped ADC's registers when recording:

It shown that register 0x73 and 0x76 have been set to 0xf0, ch5-ch8 are disabled and PDM ch5-ch8 are power-downed.

I also enabled all 8 channels by setting ADC register 0x73 to 0xff :

i2cset -f -y 2 0x4c 0x73 0xff

and verified its value have been set to 0xff by 'i2cget -f -y 2 0x4c 0x73'

after that, re-dumped ADC registers as above, the result is same(reg.0x73=0xf0, reg.0x76=0xf0).

By our experiment, it seems that ADC ch5-ch8 automatically be power-downed when recording, it causes channel5-channel8 to be zero.

Could you help me to solve this problem?

Thanks,

Best regards,

Xing-Qin

0 Carson Allen over 4 years ago in reply to Xing Ou

TI__Genius 13610 points

Hi Xing-Qin,

Could you share full schematic regarding DMIC input configuration?

Best Regards,

Carson

0 Xing Ou over 4 years ago in reply to Carson Allen

Prodigy 140 points

Hi Carson,

Sorry, I forgot it. Now I upload the schematic here, thanks.

MIC_00.pdf

Best Regards,

Xing-Qin

Audio

Audio forum

TLV320ADC3140: TLV320ADC3140 arecord error on AM4377