Beaglebone Black and tlv320aic32x4 No Audio Out or In
ed
I am currently working on getting a board designed after the BBB to work with the tlv320aic3254 audio codec. Currently i have the driver being recognized by alsa with the included overlay. I modified the driver to use the 24.576 clock which we carried over from the BBB and when i hook up the device to our saleae logic analizer the bitclock, wordclock, and data look perfect when running speaker-test -t sine -f 1000. As in the overlay the AM335x is the slave device TLV320AIC3254 and the output data is correct. When using alsamixer i am able to configure the channels and the reg data changes but i get no sound out of either line out or headphone when the channels are enabled. I suspect there is either an overlay or configuration issue preventing the output of audio data as when i do arecord with a 1khz sine wave as input i get no data out as well. At this point i am at a loss as to why this is not working. I have included for reference my overlay, the register dump while speaker-test is running for page one and two and the updated driver with the MCLK patch and my additional clocking entries. Any help would be greatly appreciated
/*
* 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/;
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/pinctrl/am33xx.h>
/ {
compatible = "ti,beaglebone", "ti,beaglebone-black", "ti,beaglebone-green";
/* 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 */
"P9.30", /* mcasp0: mcasp0_axr0 */
/* the hardware ip uses */
"gpio3_21",
"mcasp0";
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__ {
bone_audio_cape_audio_pins: pinmux_bone_audio_cape_audio_pins {
pinctrl-single,pins = <
0x190 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* mcasp0_aclkx.mcasp0_aclkx */
0x194 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* mcasp0_fsx.mcasp0_fsx, INPUT */
0x198 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* mcasp0_axr0.mcasp0_axr0 */
0x19c (PIN_INPUT_PULLDOWN | MUX_MODE2) /* mcasp0_ahclkr.mcasp0_axr2 */
0x1ac (PIN_INPUT_PULLDOWN | MUX_MODE0) /* MCASP0_AHCLKX -> MCASP0_AHCLKX (I2S_MCLK_OUT)- in */
0x06c ( PIN_OUTPUT_PULLUP | MUX_MODE7 ) /* mcasp0_axr1 GPIO1_27 | OUTPUT | PULLUP */
>;
};
};
};
fragment@1 {
target = <&i2c0>;
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
clock-frequency = <100000>;
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&i2c0_pins>;
tlv320aic32x4: tlv320aic32x4@18 {
#sound-dai-cells = <0>;
compatible = "ti,tlv320aic32x4";
reg = <0x18>;
};
};
};
fragment@2 {
target = <&mcasp0>;
__overlay__ {
#sound-dai-cells = <0>;
compatible = "ti,am33xx-mcasp-audio";
pinctrl-names = "default";
pinctrl-0 = <&bone_audio_cape_audio_pins>;
status = "okay";
op-mode = <0>; /* MCASP_IIS_MODE */
tdm-slots = <2>;
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-path="/";
__overlay__ {
sound {
compatible = "simple-audio-card";
simple-audio-card,name = "Nyquist Dev Kit";
simple-audio-card,format = "dsp_b";
simple-audio-card,widgets =
"Headphone", "Headphone Jack",
"Line", "Line In",
"Line", "Line Out";
simple-audio-card,routing =
"Headphone Jack", "HPL",
"Headphone Jack", "HPR",
"Line Out", "LOL",
"Line Out", "LOR",
"IN1_L", "Line In",
"IN1_R", "Line In",
"IN2_L", "Line In",
"IN2_R", "Line In",
"IN3_L", "Line In",
"IN3_R", "Line In";
simple-audio-card,bitclock-master = <&sound_master>;
simple-audio-card,frame-master = <&sound_master>;
simple-audio-card,bitclock-inversion;
simple-audio-card,cpu {
sound-dai = <&mcasp0>;
};
sound_master: simple-audio-card,codec {
sound-dai = <&tlv320aic32x4>;
clocks = <&clk_mcasp0>;
clock-names = "mclk";
};
};
};
};
};
Ed
