Beaglebone Black and AIC320TLV3206 USBEVM

Hi!

For a pilot project i'm trying to interfacing my Beaglebone Black with the AIC320TLV3206 codec mounted on USB evalutation board.

I phisically removed the TAS1020 chip and i connected beaglebone pins to AIC320 board according to this schema 

This is the picture about how they're connected:

I loaded a dtbo generated from this dts

/*
 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
/dts-v1/;
/plugin/;

/ {
	compatible = "ti,beaglebone", "ti,beaglebone-black";

	/* identification */
	part-number = "BB-BONE-AUDI-02";
	version = "00A0", "A0";

	/* state the resources this cape uses */
	exclusive-use =
		/* the pin header uses */
		"P9.31",	/* mcasp0: mcasp0_aclkx */
		"P9.29",	/* mcasp0: mcasp0_fsx */
		"P9.28",	/* mcasp0: mcasp0_axr2 */
		"P9.25",	/* mcasp0: mcasp0_ahclkx */
		/* the hardware ip uses */
		"gpio1_18", "gpio1_19",
		"mcasp0";

	fragment@0 {
		target = <&am33xx_pinmux>;
		__overlay__ {

			i2c2_pins: pinmux_i2c2_pins {
				pinctrl-single,pins = <
					0x150 0x72 	/*spi0_scl.i2c2_sda,SLEWCTRL_SLOW | INPUT_PULLUP |MODE2*/
					0x154 0x72	/*spi0_d0.i2c2_scl,SLEWCTRL_SLOW | INPUT_PULLUP | MODE2*/
				>;
			};

			bone_audio_cape_audio_pins: pinmux_bone_audio_cape_audio_pins {
				pinctrl-single,pins = <
					0x1ac 0x00      /* mcasp0_ahclkx,             MODE0 | INPUT */
					0x19c 0x22		/* mcasp0_ahclkr, */
					0x194 0x20      /* mcasp0_fsx,         	      MODE0 | OUTPUT  */
					0x190 0x20      /* mcasp0_aclkr.mcasp0_aclkx, MODE0 | OUTPUT_PULLDOWN */
					0x198 0x20
				>;
			};
		};
	};

	fragment@1 {
		target = <&i2c2>;
		__overlay__ {
			#address-cells = <1>;
			#size-cells = <0>;
			clock-frequency = <100000>;
			status = "okay";
			pinctrl-names = "default";
			pinctrl-0 = <&i2c2_pins>;


			tlv320aic3x: tlv320aic3x@18 {
				compatible = "ti,tlv320aic3x";
				reg = <0x18>;
				status = "okay";
			};
		};
	};

	fragment@2 {
		target = <&mcasp0>;
		__overlay__ {
			pinctrl-names = "default";
			pinctrl-0 = <&bone_audio_cape_audio_pins>;

			status = "okay";

			op-mode = <0>;          /* MCASP_IIS_MODE */
			tdm-slots = <2>;
			num-serializer = <16>;
			serial-dir = <  /* 0: INACTIVE, 1: TX, 2: RX */
				2 0 1 0
				0 0 0 0
				0 0 0 0
				0 0 0 0
			>;
			tx-num-evt = <1>;
			rx-num-evt = <1>;
		};
	};

	fragment@3 {
		target = <&ocp>;
		__overlay__ {
			sound {
				compatible = "ti,da830-evm-audio";
				ti,model = "DA830 EVM";
				ti,audio-codec = <&tlv320aic3x>;
				ti,mcasp-controller = <&mcasp0>;
				ti,codec-clock-rate = <12000000>;
				ti,audio-routing =
					"Headphone Jack",       "HPLOUT",
					"Headphone Jack",       "HPROUT",
					"LINE1L",               "Line In",
					"LINE1R",               "Line In";
			};
		};

	};
};

Result:  I2C bus is setup correctly, i can write and read the chip registers (while DTBO is not loaded) and the audio card appears when the DTBO is loaded.

[ 3513.934952] bone-capemgr bone_capemgr.9: part_number 'BB-BONE-AUDI-02', version 'N/A'
[ 3513.935138] bone-capemgr bone_capemgr.9: slot #9: generic override
[ 3513.935188] bone-capemgr bone_capemgr.9: bone: Using override eeprom data at slot 9
[ 3513.935240] bone-capemgr bone_capemgr.9: slot #9: 'Override Board Name,00A0,Override Manuf,BB-BONE-AUDI-02'
[ 3513.935548] bone-capemgr bone_capemgr.9: slot #9: Requesting part number/version based 'BB-BONE-AUDI-02-00A0.dtbo
[ 3513.935602] bone-capemgr bone_capemgr.9: slot #9: Requesting firmware 'BB-BONE-AUDI-02-00A0.dtbo' for board-name 'Override Board Name', version '00A0'
[ 3513.941180] bone-capemgr bone_capemgr.9: slot #9: dtbo 'BB-BONE-AUDI-02-00A0.dtbo' loaded; converting to live tree
[ 3513.943677] bone-capemgr bone_capemgr.9: slot #9: #4 overlays
[ 3513.969706] of_get_named_gpio_flags: can't parse gpios property
[ 3513.979851] 1-0018 supply IOVDD not found, using dummy regulator
[ 3513.980096] 1-0018 supply DVDD not found, using dummy regulator
[ 3513.980259] 1-0018 supply AVDD not found, using dummy regulator
[ 3513.980442] 1-0018 supply DRVDD not found, using dummy regulator
[ 3514.002711] davinci_evm sound.13:  tlv320aic3x-hifi <-> 48038000.mcasp mapping ok
[ 3514.033187] bone-capemgr bone_capemgr.9: slot #9: Applied #4 overlays.

arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: EVM [DA830 EVM], device 0: AIC3X tlv320aic3x-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Unfortunally i can't get any audio when i run this command

arecord -r 44100 -c 1 -f S16_LE -t wav -vv -d 25 /tmp/example.wav

looks like nothing is sent through the I2S interface as only 44 bytes of WAV header are dumped into the file.

Can this evaluation board intended to be used this way? 

Any ideas?