在 iMX8M mini android 9 設計 WM8962 audio codec，撥放音樂，I2S DAC 無輸出

[macochen]

以下附上目前的程式碼、DTS 及線路

目前使用環境為Android 9 

在 driver 上的設定開啟 config 檔案 如下 :

CONFIG_SND_SOC_IMX_WM8962=y

CONFIG_SND_SOC_WM8962=y

dts 設定如下 如附檔 imx8mm-pico-wizard.dts :

wm8962: wm8962@1a {

                compatible = "wlf,wm8962";

                #sound-dai-cells = <0>;

                clock-names = "mclk";

                wlf,shared-lrclk;

                wlf,fixed-mclk;

                reg = <0x1a>;

                clocks = <&codec_osc>;

                DCVDD-supply = <&reg_wm8962>;

                DBVDD-supply = <&reg_wm8962>;

                AVDD-supply = <&reg_wm8962>;

                CPVDD-supply = <&reg_wm8962>;

                MICVDD-supply = <&reg_wm8962>;

                PLLVDD-supply = <&reg_wm8962>;

                SPKVDD1-supply = <&reg_wm8962>;

                SPKVDD2-supply = <&reg_wm8962>;

                gpio-cfg = <

                        0x0000

                        0x0000

                        0x0013

                        0x0000

                        0x8014

                        0x0000

                >;

                amic-mono;

                //power-domains = <&pd_mclk_out0>;

        };

sound-wm8962 {

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

                             "fsl,imx-audio-wm8962";

                model = "wm8962-audio";

                cpu-dai = <&sai2>;

                audio-codec = <&wm8962>;

                audio-routing =

                        "Headphone Jack", "HPOUTL",

                        "Headphone Jack", "HPOUTR",

                        "Ext Spk", "SPKOUTL",

                        "Ext Spk", "SPKOUTR",

                        "AMIC", "MICBIAS",

                        "IN3R", "AMIC",

                        "DMIC", "MICBIAS",

                        "DMICDAT", "DMIC",

                        "Playback", "CPU-Playback",

                        "CPU-Capture", "Capture";

                codec-master;

                hp-det-gpios = <&gpio5 3 1>;

                mic-det-gpios = <&gpio5 4 1>;

        };

目前開機啟動LOG為

pico_imx8mm:/ # dmesg | grep wm89

[    3.950469] wm8962 2-001a: customer id 0 revision F

[    4.183961] imx-wm8962 sound-wm8962: wm8962 <-> 30020000.sai mapping ok

[    4.190667] imx-wm8962 sound-wm8962: ASoC: no DMI vendor name!

[    4.448055] #0: wm8962-audio

執行 tinyplay 1kHz_44100Hz_16bit_30sec.wav 後

執行後沒有任何作動，波形如附件。

[macochen]

Hi Jimmychan

   目前播放聲音已經正常，但麥克風收音時，無聲音。 tinycap 時 SAI2_I2S 的 BCLK、LRCLK、ADCDAT 波形正常，都有波形輸出

   錄音下來的音檔，卻沒有聲音。不清楚為甚麼 imx8m mini 沒接收 ADCDAT 的資料

   附件有 ALSA、DST、android 的設定給您參考

   請再給我們一些建議，謝謝 !!!

[jimmychan]

According to the drivers imx-wm8962.c and wm8962.c, please put the "amic-mono" under your "sound-wm8960" which is "imx-audio-wm8962" compatible.

There is "mic-det-gpios". This affect the capture and mic's enable. Please check this.

[jimmychan]

In your device tree, there is no IOMUX setting for sai2 pins. Please add the pinctrl_sai2 for the sai2 pins.

[macochen]

謝謝您的幫忙 !!

這個設定我們放置在其它的地方，之前沒有提供給您，請您參考附件 DTS

還有可能是其他的問題嗎 ?

非常感謝您的協助

[jimmychan]

把 "fsl,imx6q-sabresd-wm8962" 和 codec-master 去掉試試看.