topic wm8962 with iMX6d on a custom board in i.MX Processors

wm8962 with iMX6d on a custom board

haggaytavyumi — Mon, 08 Aug 2016 09:10:57 GMT

Hello all

I use the iMX6d and the WM8962 in my custom board he is just like the sabreSD schematics with one change I use the AUD5 SSI pins instead of the AUD3 pins.

The BSP version I use is 3.14.52 YOCTO.

I have reconfigured the the DTS in the pin muxing:

/*wm8962-audio*/

pinctrl_audmux: audmux_grp {

fsl,pins = <

MX6QDL_PAD_DISP0_DAT19__AUD5_RXD 0x130b0

MX6QDL_PAD_DISP0_DAT16__AUD5_TXC 0x130b0

MX6QDL_PAD_DISP0_DAT17__AUD5_TXD 0x130b0

MX6QDL_PAD_DISP0_DAT18__AUD5_TXFS 0x130b0

};

sound {

compatible = "fsl,imx6q-sabresd-wm8962",

"fsl,imx-audio-wm8962";

model = "wm8962-audio";

cpu-dai = <&ssi1>;

audio-codec = <&codec>;

asrc-controller = <&asrc>;

amic-mono;

audio-routing =

"Headphone Jack", "HPOUTL",

"Headphone Jack", "HPOUTR",

"Ext Spk", "SPKOUTL",

"Ext Spk", "SPKOUTR",

"MICBIAS", "AMIC",

"IN3R", "MICBIAS",

"DMIC", "MICBIAS",

"DMICDAT", "DMIC",

"CPU-Playback", "ASRC-Playback",

"Playback", "CPU-Playback",

"ASRC-Capture", "CPU-Capture",

"CPU-Capture", "Capture";

mux-int-port = <1>;

mux-ext-port = <5>;

hp-det-gpios = <&gpio7 13 1>;

mic-det-gpios = <&gpio7 13 1>;

};

&i2c3 {

clock-frequency = <100000>;

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_i2c3>;

status = "okay";

codec: wm8962@1a {

compatible = "wlf,wm8962";

reg = <0x1a>;

clocks = <&clks 201>;

DCVDD-supply = <&reg_audio>;

DBVDD-supply = <&reg_audio>;

AVDD-supply = <&reg_audio>;

CPVDD-supply = <&reg_audio>;

MICVDD-supply = <&reg_audio>;

PLLVDD-supply = <&reg_audio>;

SPKVDD1-supply = <&reg_audio>;

SPKVDD2-supply = <&reg_audio>;

gpio-cfg = <

0x0000 /* 0:Default */

0x0000 /* 1:Default */

0x0013 /* 2:FN_DMICCLK */

0x0000 /* 3:Default */

0x8014 /* 4:FN_DMICCDAT */

0x0000 /* 5:Default */

};

&audmux {

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_audmux>;

status = "okay";

};

The driver is loads fine:

ALSA device list:

#0: wm8962-audio

#1: imx-hdmi-soc

with one error:

wm8962 2-001a: DC servo timed out

now the problem is that I can't play sound. I have tested it with the command:

cat /dev/urandom | aplay -D hw:0,0 -f S24_LE

sound is not consistent it start and stops.

while I am trying to play sound with Gstreamer :

gst-launch-1.0 audiotestsrc wave=0 ! alsasink device=hw:0,0 slave-method=0

I get nothing.any ideas?

the HDMI sound doesn't work as well with a different error :

imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready!

imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22

Re: wm8962 with iMX6d on a custom board

igorpadykov — Mon, 08 Aug 2016 23:46:09 GMT

Hi haggay

error wm8962 2-001a: DC servo timed out

may mean hardware problems with codec power-up, recommended to

check audio codec clocks and voltages with oscilloscope.

Also one can try solution provided

i.mx6Q audio codec wm8962 sometimes failed to play

Best regards

igor

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Re: wm8962 with iMX6d on a custom board

haggaytavyumi — Wed, 10 Aug 2016 13:06:27 GMT

Hi igor

Thank you for your replay.

I have checked the clock that the iMX is delivering to the WM8962 and it look like the clock is only active when the linux plays sound.

while the codec should get the clock all the time. do you have any idea why and how to solve it?

p.s

The solution you mentioned is not very helpful because it is a solution for very old BSP.

Re: wm8962 with iMX6d on a custom board

haggaytavyumi — Mon, 05 Sep 2016 08:20:23 GMT

I have managed to fix the problem.

The reason for all this mess was the regulator which I have configured to "regulator-always-on".

    reg_audio: regulator@2 {
            compatible = "regulator-fixed";
            reg = <2>;
            regulator-name = "wm8962-supply";
            gpio = <&gpio1 30 0>;
            enable-active-high;
            /*regulator-always-on;*/
        };

Another change was the mono speaker configuration in the driver.

The mono function is not working.

The reason was wrong parameter in WM8962_CLASS_D_CONTROL_1 register.

I have changed the line 2193 in file wm8962.c to :

@@ -2188,7 +2190,7 @@ SND_SOC_DAPM_MIXER("Speaker Mixer", WM8962_MIXER_ENABLES, 1, 0,

spkmixl, ARRAY_SIZE(spkmixl)),

SND_SOC_DAPM_MUX_E("Speaker PGA", WM8962_PWR_MGMT_2, 4, 0, &spkoutl_mux,

out_pga_event, SND_SOC_DAPM_POST_PMU),

-SND_SOC_DAPM_PGA("Speaker Output", WM8962_CLASS_D_CONTROL_1, 7, 0, NULL, 0),

+SND_SOC_DAPM_PGA("Speaker Output", WM8962_CLASS_D_CONTROL_1, 6, 0, NULL, 0),

SND_SOC_DAPM_OUTPUT("SPKOUT"),

};

now it is working.

I have made some more changes to my sound node in the DTS.

    sound {
        compatible = "fsl,imx6q-sabresd-wm8962",
               "fsl,imx-audio-wm8962";
        model = "wm8962-audio";
        cpu-dai = <&ssi2>;
        audio-codec = <&codec>;
        asrc-controller = <&asrc>;
        audio-routing =
            "Headphone Jack", "HPOUTL",
            "Headphone Jack", "HPOUTR",
            "Ext Spk", "SPKOUT",
            "Mic Jack","AMIC",
            "Mic Bias","IN1R",
            "MICBIAS", "AMIC",
            "IN3R", "MICBIAS",
            "IN2L", "MICBIAS",
            "DMIC", "MICBIAS",
            "DMICDAT", "DMIC",
            "CPU-Playback", "ASRC-Playback",
            "Playback", "CPU-Playback",
            "ASRC-Capture", "CPU-Capture",
            "CPU-Capture", "Capture";
        mux-int-port = <2>;
        mux-ext-port = <5>;
        hp-det-gpios = <&gpio7 13 GPIO_ACTIVE_HIGH>;
        mic-det-gpios = <&gpio7 13 GPIO_ACTIVE_HIGH>;
    };

Now the problem is that I have two microphones plugged in and only the right mic is working.

Does some one know how to configure the two mics to work simultaneously.

I don't care if it mixed to mono.

Thanks