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imx6 and cs42888

Question asked by leila zolfaghari on Sep 16, 2017
Latest reply on Sep 19, 2017 by igorpadykov

i have a custom carrier board with toradex colibri imx6 CoM. i have used the CS42888 audio codec to support multiple audio channels. i had a look at NXP SABRE AI board, according to its schematic, i have designed and connected the CS42888 codec to imx6 ESAI, the Device Tree is modified as below :


        sound-cs4288 {

               compatible = "fsl,imx6-sabreauto-cs42888",


               model = "imx-cs42888";

               esai-controller = <&esai>;

               asrc-controller = <&asrc>;

               audio-codec = <&codec_cs42888>;




&clks {

        assigned-clocks = <&clks IMX6QDL_PLL4_BYPASS_SRC>,

                         <&clks IMX6QDL_PLL4_BYPASS>,

                         <&clks IMX6QDL_CLK_PLL4_POST_DIV>;

        assigned-clock-parents = <&clks IMX6QDL_CLK_LVDS2_IN>,

                               <&clks IMX6QDL_PLL4_BYPASS_SRC>;

        assigned-clock-rates = <0>, <0>, <24576000>;

        fsl,ldb-di0-parent = <&clks IMX6QDL_CLK_PLL2_PFD0_352M>;

        fsl,ldb-di1-parent = <&clks IMX6QDL_CLK_PLL2_PFD0_352M>;




&esai {

        pinctrl-names = "default";

        pinctrl-0 = <&pinctrl_esai &pinctrl_eim_a21_input>;

        assigned-clocks = <&clks IMX6QDL_CLK_ESAI_SEL>,

                         <&clks IMX6QDL_CLK_ESAI_EXTAL>;

        assigned-clock-parents = <&clks IMX6QDL_CLK_PLL4_AUDIO_DIV>;

        assigned-clock-rates = <0>, <24576000>;

        status = "okay";



&i2c1 {

        clock-frequency = <100000>;

        pinctrl-names = "default";

        pinctrl-0 = <&pinctrl_i2c1>;

        status = "okay";


        codec_cs42888: cs42888@48 {

                       compatible = "cirrus,cs42888";

                       reg = <0x48>;

                       clocks = <&codec_osc>;

                       clock-names = "mclk";

                       VA-supply = <&reg_audio>;

                       VD-supply = <&reg_audio>;

                       VLS-supply = <&reg_audio>;

                       VLC-supply = <&reg_audio>;




&iomuxc {


        pinctrl_esai: esaigrp {

               fsl,pins = <

                       MX6QDL_PAD_GPIO_6__ESAI_TX_CLK        0x1b030

                       MX6QDL_PAD_GPIO_2__ESAI_TX_FS         0x1b030

                       MX6QDL_PAD_GPIO_5__ESAI_TX2_RX3               0x1b030

                       MX6QDL_PAD_GPIO_7__ESAI_TX4_RX1               0x1b030

                       MX6QDL_PAD_GPIO_8__ESAI_TX5_RX0               0x1b030

                       MX6QDL_PAD_NANDF_CS2__ESAI_TX0        0x1b030

                       MX6QDL_PAD_NANDF_CS3__ESAI_TX1        0x1b030

                       MX6QDL_PAD_GPIO_1__ESAI_RX_CLK        0x1b030

                       MX6QDL_PAD_GPIO_9__ESAI_RX_FS         0x1b030



        // this pin is multiplexed with MX6QDL_PAD_GPIO_1__ESAI_RX_CLK on colibri module, so we should config it as gpio input

        pinctrl_eim_a21_input: eimInput {

               fsl,pins = <

                       MX6QDL_PAD_EIM_A21__GPIO2_IO17        PAD_CTRL_IN





the codec driver, ESAI platform driver and machine driver are loaded successfully and the codec registered under ALSA, the output of 'aplay -l' and 'arecord -l' shown that the codec registered. but when i play a wav file, the bellow error shown and no signal and clocks appear on ESAI pins :


aplay -D hw:0,0 test.wav

Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 8000 Hz, Mono

Warning: rate is not accurate (requested = 8000Hz, got = 32000Hz)

         please, try the plug plugin

aplay: pcm_write:1947: write error: Input/output error


the kernel version is 3.14.52, has anybody no idea to solve the issue??