RK3288 Android5.1下的RT5640调试

2023-05-13 07:59:32

首先交代下运行环境：

RK3288+Android5.1 mid版本 原来开发板上用的音频Codec是RT5631，现在板子上换了RT5640,拿到板子后首先Google一把，收到了CSDN的一篇文章，按他的说法是RT3224和RT5640是pin2pin的，软硬件完全兼容，使用RT3261的驱动即可，我实际在Android5.1上测试不行。于是还是使用了RT5640试了下，发现有有有声音，一路没有声音。修改过程记录如下:

1.修改config

路径kernel/arch/arm/configs/rockchip_defconfig：

CONFIG_SND_RK_SOC_RT5640=y

2.添加DTS

路径kernel/arch/arm/boot/dts/rk3288-tb_8846.dts:

rockchip-rt5640 { status = “okay”; compatible = “rockchip-rt5640”; dais { dai0 { audio-codec = <&rt5640>; audio-controller = <&i2s>; format = “i2s”; //continuous-clock; //bitclock-inversion; //frame-inversion; //bitclock-master; //frame-master; }; dai1 { audio-codec = <&rt5640>; audio-controller = <&i2s>; //format = “i2s”; format = “dsp_a”; //continuous-clock; bitclock-inversion; //frame-inversion; //bitclock-master; //frame-master; }; }; }; &i2c2 { status = “okay”; rt5640: rt5640@1c { compatible = “rt5640”; reg = <0x1c>; codec-en-gpio = <1>;//sdk default high level spk-num= <2>; modem-input-mode = <1>; lout-to-modem_mode = <1>; spk-amplify = <2>; playback-if1-data_control = <0>; playback-if2-data_control = <0>; status = “okay”; }; };

编译完成后烧写进去IN1P IN1N可以出声音了，但是IN2P IN2N死活没有声音，经过2天读RT5640 datasheet,终于搞定了问题，需要在kernel/sound/soc/codecs/rt5640.c里面做如下修改：

static struct rt5640_init_reg init_list[] = { {RT5640_GEN_CTRL1 , 0x3f01},//fa[12:13] = 1b; fa[8~11]=1; fa[0]=1 {RT5640_ADDA_CLK1 , 0x1114},//73[2] = 1b {RT5640_MICBIAS , 0x3030},//93[5:4] = 11b ….. …. {RT5640_REC_L2_MIXER , 0x007d},//Mic1 -> RECMIXL // {RT5640_REC_R2_MIXER , 0x007d},//Mic1 -> RECMIXR // close by lwx // {RT5640_REC_L2_MIXER , 0x006f},//Mic2 -> RECMIXL {RT5640_REC_R2_MIXER , 0x006f},//Mic2 -> RECMIXR // open by lwx {RT5640_STO_ADC_MIXER , 0x3020},//ADC -> Sto ADC mixer ….. …..

修改完成后IN2P IN2N也可以输入声音了。