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TLV320AIC3106: m_read:2221: read error: Input/output error

Hasan Men
Prodigy 10 points
Part Number: TLV320AIC3106


Hi Audio Forum, I'd like to share my problem when I moved device tree and kernel from linux 4.14 to 5.15.

I'm using am335xx as base and have TLV320AIC3106 codec. Previously I was using yocto dunfell with kernel 4.14 I didn't have any problem with these device tree configurations.

/{
...
    regulators {
    	compatible = "simple-bus";
    
    	vcc3v3: fixedregulator@1 {
    		compatible = "regulator-fixed";
    		regulator-name = "vcc3v3";
    		regulator-min-microvolt = <3300000>;
    		regulator-max-microvolt = <3300000>;
    	};
    };
    sound {
    	compatible = "ti,da830-evm-audio";
    	ti,model = "AM335x-EVM";
    	ti,audio-codec = <&audio_codec>;
    	ti,mcasp-controller = <&mcasp0>;
    	ti,codec-clock-rate = <12000000>;
    	ti,audio-routing =
    		"LINE1L",               "Line In",
    		"LINE2L",               "Line In",
    		"LINE1R",               "Line In",
    		"LINE2R",               "Line In";
    	clocks = <&mcasp0_fck>;
    	clock-names = "mclk";
    };
};

&i2c0 {
	audio_codec: tlv320aic3106@18 {
		compatible = "ti,tlv320aic3106";
		reg = <0x18>;
		ai3x-micbias-vg = <0x0>;
		status = "okay";
	};
};

&am33xx_pinmux {
	audio_pins: pinmux_audio {
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x9AC, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* mcasp0_ahclkx.mcasp0_ahclkx */
			AM33XX_IOPAD(0x990, PIN_INPUT_PULLDOWN | MUX_MODE0)  /* mcasp0_aclkx.mcasp0_aclkx */
			AM33XX_IOPAD(0x994, PIN_INPUT_PULLDOWN | MUX_MODE0)  /* mcasp0_fsx.mcasp0_fsx */
			AM33XX_IOPAD(0x998, PIN_INPUT_PULLDOWN | MUX_MODE0)  /* mcasp0_axr0.mcasp0_axr0 */
			AM33XX_IOPAD(0x9A8, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* mcasp0_axr1.mcasp0_axr1 */
		>;
	};
};

&mcasp0 {
	status = "okay";
	pinctrl-names = "default";
	pinctrl-0 = <&audio_pins>;

	op-mode = <0>;	/* MCASP_ISS_MODE */
	tdm-slots = <2>;
	serial-dir = <
		2 1 0 0
	>;
	tx-num-evt = <2>;
	rx-num-evt = <2>;
};
...
and I can use aplay in order to capture sounds 
# aplay -vvv -C -D hw:0,0 -r 16000 -f S16_LE -c 2 /tmp/a.wav

Recording WAVE '/tmp/a.wav' : Signed 16 bit Little Endian, Rate 16000 Hz, Stereo
Hardware PCM card 0 'AM335x-EVM' device 0 subdevice 0
Its setup is:
  stream       : CAPTURE
  access       : RW_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 2
  rate         : 16000
  exact rate   : 16000 (16000/1)
  msbits       : 16
  buffer_size  : 8000
  period_size  : 2000
  period_time  : 125000
  tstamp_mode  : NONE
  tstamp_type  : MONOTONIC
  period_step  : 1
  avail_min    : 2000
  period_event : 0
  start_threshold  : 1
  stop_threshold   : 8000
  silence_threshold: 0
  silence_size : 0
  boundary     : 2097152000
  appl_ptr     : 0
  hw_ptr       : 0
Max peak (4000 samples): 0x000000d0 #                    0%
Max peak (4000 samples): 0x000000f1 #                    0%
Max peak (4000 samples): 0x000000d4 #                    0%
Max peak (4000 samples): 0x000000d6 #                    0%
Max peak (4000 samples): 0x000000db #                    0%
Max peak (4000 samples): 0x000000d2 #                    0%
Max peak (4000 samples): 0x0000017d #                    1%
Max peak (4000 samples): 0x0000013e #                    0%
Max peak (4000 samples): 0x00000154 #                    1%
Max peak (4000 samples): 0x00000149 #                    1%
Max peak (4000 samples): 0x00000160 #                    1%





lsmod:


~# lsmod
Module                  Size  Used by
cn                     16384  1
snd_soc_evm            16384  1
snd_soc_davinci_mcasp    24576  2
snd_soc_tlv320aic3x    49152  1
snd_soc_edma           16384  1 snd_soc_davinci_mcasp
snd_soc_omap           16384  1 snd_soc_davinci_mcasp
snd_soc_core          118784  5 snd_soc_davinci_mcasp,snd_soc_edma,snd_soc_evm,snd_soc_omap,snd_soc_tlv320aic3x
snd_pcm_dmaengine      16384  2 snd_soc_omap,snd_soc_core
snd_pcm                81920  6 snd_soc_davinci_mcasp,snd_pcm_dmaengine,snd_soc_omap,snd_soc_core,snd_soc_tlv320aic3x
snd_timer              28672  1 snd_pcm
snd                    49152  4 snd_timer,snd_soc_core,snd_pcm
soundcore              16384  1 snd
cpufreq_dt             16384  0
cryptodev              45056  0

The things are changed when we tried to use latest simple-audio-card driver.

\ {
	regulators {
		compatible = "simple-bus";

		vcc3v3: fixedregulator@1 {
			compatible = "regulator-fixed";
			regulator-name = "vcc3v3";
			regulator-min-microvolt = <3300000>;
			regulator-max-microvolt = <3300000>;
		};
	};

	sound {
		compatible = "simple-audio-card";
		simple-audio-card,name = "snd-ddi";
		simple-audio-card,widgets =
			"Line", "Line In";
		simple-audio-card,routing =
					"LINE1L", "Line In",
					"LINE2L", "Line In",
					"LINE1R", "Line In",
					"LINE2R", "Line In";
		simple-audio-card,format = "i2s";
		simple-audio-card,bitclock-master = <&sound_codec>;
		simple-audio-card,frame-master = <&sound_codec>;
		simple-audio-card,mclk-fs = <32>;

		sound_cpu: simple-audio-card,cpu {
			sound-dai = <&mcasp0>;
		};

		sound_codec: simple-audio-card,codec {
			sound-dai = <&tlv320aic3106>;
			clocks = <&mcasp0_fck>;
		};
	};
};

&i2c0 {
	tlv320aic3106: tlv320aic3106@18 {
		#sound-dai-cells = <0>;
		compatible = "ti,tlv320aic3106";
		reg = <0x18>;
		status = "okay";

		/* Regulators */
		AVDD-supply = <&vcc3v3>;
		IOVDD-supply = <&vcc3v3>;
		DRVDD-supply = <&vcc3v3>;
		DVDD-supply = <&vdig1_reg>;
	};
};

&vdig1_reg {
	regulator-boot-on;
	regulator-always-on;
};

&mcasp0 {
	#sound-dai-cells = <0>;
	status = "okay";
	pinctrl-names = "default";
	pinctrl-0 = <&mcasp0_pins>;

	op-mode = <0>;	/* MCASP_ISS_MODE */
	tdm-slots = <2>;
	serial-dir = <
		2 1 0 0
	>;
	tx-num-evt = <2>;
	rx-num-evt = <2>;
};
  for this dts, I always get pcm_read error 
~# lsmod

Module                  Size  Used by
snd_soc_simple_card    16384  1
snd_soc_simple_card_utils    20480  1 snd_soc_simple_card
snd_soc_davinci_mcasp    28672  2
snd_soc_ti_udma        16384  1 snd_soc_davinci_mcasp
snd_soc_ti_edma        16384  1 snd_soc_davinci_mcasp
snd_soc_ti_sdma        16384  1 snd_soc_davinci_mcasp
snd_soc_tlv320aic3x_i2c    16384  1
snd_soc_tlv320aic3x    53248  1 snd_soc_tlv320aic3x_i2c
snd_soc_core          147456  7 snd_soc_davinci_mcasp,snd_soc_simple_card_utils,snd_soc_ti_sdma,snd_soc_ti_edma,snd_soc_tlv320aic3x,snd_soc_ti_udma,snd_soc_simple_card
snd_pcm_dmaengine      16384  1 snd_soc_core
snd_pcm                94208  5 snd_soc_davinci_mcasp,snd_pcm_dmaengine,snd_soc_core,snd_soc_tlv320aic3x
snd_timer              28672  1 snd_pcm
snd                    57344  4 snd_timer,snd_soc_core,snd_pcm
soundcore              16384  1 snd
cfg80211              307200  0
cpufreq_dt             16384  0



~# aplay -vvv -C -D hw:0,0 -r 16000 -f S16_LE -c 2 /tmp/a.wav
Recording WAVE '/tmp/a.wav' : Signed 16 bit Little Endian, Rate 16000 Hz, Stereo
Hardware PCM card 0 'snd-ddi' device 0 subdevice 0
Its setup is:
  stream       : CAPTURE
  access       : RW_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 2
  rate         : 16000
  exact rate   : 16000 (16000/1)
  msbits       : 16
  buffer_size  : 8000
  period_size  : 2000
  period_time  : 125000
  tstamp_mode  : NONE
  tstamp_type  : MONOTONIC
  period_step  : 1
  avail_min    : 2000
  period_event : 0
  start_threshold  : 1
  stop_threshold   : 8000
  silence_threshold: 0
  silence_size : 0
  boundary     : 2097152000
  appl_ptr     : 0
  hw_ptr       : 0
arecord: pcm_read:2221: read error: Input/output error

What do you suggest in order to investigate problem and solve it? I used here as reference: https://git.phytec.de/linux-mainline/tree/arch/arm/boot/dts/am335x-wega.dtsi?h=v5.15.82-phy

Every answer is welcomed, and many thanks

  • 0
    TI__Genius 11850 points

    Kindly measure the i2s clk(bck/ws clk) with scope during recording. and post the clk waveforms. Thanks.

  • 0
    Prodigy 10 points

    Hi , I did measurement.

    I've realized that there are clock ticks on old device tree only. New implementation is always 0.

    old_ wclk:

    old_mlck: 

    old_bclk: 

    new_mclk:

    new_mclk:

    I'm using same clocks but couldn't understand why it's not driven.

  • 0
    Prodigy 10 points

    I've made some changes this after phytec feedback on clock definition and now I'm able to record some sounds but I'm not confident about correctness of it. How should I select mclk-fs value?

    sound {
		compatible = "simple-audio-card";
		simple-audio-card,name = "snd-ddi";
		simple-audio-card,widgets =
			"Line", "Line In";
		simple-audio-card,routing =
					"LINE1L", "Line In",
					"LINE2L", "Line In",
					"LINE1R", "Line In",
					"LINE2R", "Line In";
		simple-audio-card,format = "i2s";
		simple-audio-card,bitclock-master = <&sound_cpu>;
		simple-audio-card,frame-master = <&sound_cpu>;
		simple-audio-card,mclk-fs = <512>;

		sound_cpu: simple-audio-card,cpu {
			sound-dai = <&mcasp0>;
		};

		sound_codec: simple-audio-card,codec {
			sound-dai = <&tlv320aic3106>;
		};
	};

  • 0 in reply to Hasan Men
    TI__Genius 11850 points

    Hi, 

    For the dts setting posted in the thread, it seemed that mcasp0 has been set as master, kindly consult am335xx team. Thanks.