topic Re: codec configuration for IMX6SoloX board. in i.MX Processors

codec configuration for IMX6SoloX board.

robinsingh — Thu, 07 May 2015 22:18:41 GMT

HI All,

I want to know the setting required for a new codec to make it work in imx6sx kernel 3.10.

here is what i am trying to do :

1) Connection :

LCD1_RESET -> AUD3_RXD -> -> I2S_SDIO codec side

LCD1_ENABLE -> AUD3_TXC -> J -> I2S_ LRCLK codec side

LCD1_HSYNC -> AUD3_TXD -> -> I2S_ SDI codec

LCD1_VSYNC -> AUD3_TXFS -> -> I2S_SCLK_codec

i have written a Machine driver(based on wm8962 driver imx-wm8962.c) for my codec , but as of now i do not see any signal coming out:

Here is my DT binding:

============================================

/*DT binding for DAI LINK driver*/

sound {

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

"fsl,imx-audio-mycodec";

model = "mycodec-audio";

cpu-dai = <&ssi2>; /* si-controller*/

audio-codec = <&codec;

audio-routing =

"Headphone Jack", "HPOUTL",

"Headphone Jack", "HPOUTR",

"Ext Spk", "SPKOUTL",

"Ext Spk", "SPKOUTR",

"AMIC", "MICBIAS",

"IN3R", "AMIC";

mux-int-port = <2>;

mux-ext-port = <3>;

hp-det-gpios = <&gpio1 17 1>;

};

==============================================

FIle : imx6sx.dtsi

audmux {

pinctrl_audmux_4: audmuxgrp-4 {

fsl,pins = <

MX6SX_PAD_LCD1_ENABLE__AUDMUX_AUD3_TXC 0x130B0

MX6SX_PAD_LCD1_VSYNC__AUDMUX_AUD3_TXFS 0x130B0

MX6SX_PAD_LCD1_HSYNC__AUDMUX_AUD3_TXD 0x120B0

MX6SX_PAD_LCD1_RESET__AUDMUX_AUD3_RXD 0x130B0

};

=====================

File : imx6sx-sdb.dts

&audmux {

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_audmux_4>;

status = "okay";

};

===========================

I am using SSI2 ===> AUD3 ====> my codec

Does above setting looks fine or i am missing something? please share some details including clock for ssi2 etc

thanks

Robin Singh

Re: codec configuration for IMX6SoloX board.

saurabh206 — Fri, 08 May 2015 04:32:36 GMT

Robin

Does You codec is in slave configuration or master configuration?

You need to make code change for clock supply.

Thanks

Saurabh

Re: codec configuration for IMX6SoloX board.

robinsingh — Fri, 08 May 2015 06:09:16 GMT

HI Saurabh,

Thank you for your reply. I am configuring codec as a slave device. what are code change required for clock supply ? Can you please give me some pointer ?

I checked in /sys/kernel/debugs/clk/clk_summry and clocks are not enable on my board for audio [ ssi1_ipg,ssi2_ipg,ssi_ipg].i tried to enable them machine code , but no luck. please give me some pointer .

thanks

Robin Singh

Re: codec configuration for IMX6SoloX board.

igorpadykov — Fri, 08 May 2015 06:34:19 GMT

Hi robin

suggest to check attached Porting Guide

Chapter 8 Porting Audio Codecs to a Custom Board

Best regards

igor

Re: codec configuration for IMX6SoloX board.

saurabh206 — Sat, 09 May 2015 03:49:48 GMT

Robin

you can study existing code from "kernel\sound\soc\fsl"

Following modification is required for your driver.

snd_soc_dai_set_fmt needs to pass SND_SOC_DAIFMT_CBS_CFS for I2S as a master mode.

And

snd_soc_dai_set_sysclk(cpu_dai, 0, bclk, SND_SOC_CLOCK_OUT);

I hope this helps.

Thanks

Saurabh