怎样将RT5640替换成ES8396音频芯片呢

怎样将RT5640替换成ES8396音频芯片呢？
如何让RT5640和ES8396在硬件上兼容呢？

回帖（1）

张荣

2022-2-10 13:38:04

Platform: ROCKCHIP
Chip: RK3288
OS: Android7.1.2
Kernel: 4.4.143
背景：

之前平台用的RT5640, 由于此IC将要停产,所以需要替换为ES8396，RT5640和ES8396在硬件上兼容,只是芯片换了。
音频开发指南

一个声卡包含cpu_dai, codec_dai, 以及dai_link组成，分别对应cpu dai的dirver，比如I2S driver, spdif driver；codec driver，比如rt5640 codec driver；dai_link driver，也就是machine driver，比如sound/soc/rockchip/rockchip_rt5640.c。
4.4的内核中支持两种方式创建声卡，一种是通用的simple-card framework，一种是传统的编写自定义的machine driver来创建
硬件原理图

数据走I2S0通道
控制走I2C2通道
输出走HPLOUT/HPROUT SPKROUTP/SPKLOUTP
打开对应的宏

/kernel/arch/arm/configs/rockchip_defconfig
+CONFIG_SND_SOC_ES8396=y
修改dts文件

/kernel/arch/arm/boot/dts/rk3288-android.dtsi
原本的是rt5640，修改后的是es8396

+#if 0
+       hdmi_analog_sound: hdmi-analog-sound {
+          status = "okay";
+          compatible = "rockchip,rk3288-hdmi-analog",
+                   "rockchip,rk3368-hdmi-analog";
+          rockchip,model = "rockchip,rt5640-codec";
+          rockchip,cpu = <&i2s>;
+          rockchip,codec = <&rt5640>, <&hdmi>;
+          rockchip,widgets =
+             "Microphone", "Microphone Jack",
+             "Headphone", "Headphone Jack";
+          rockchip,routing =
+             "MIC1", "Microphone Jack",
+             "MIC2", "Microphone Jack",
+             "Microphone Jack", "micbias1",
+             "Headphone Jack", "HPOL",
+             "Headphone Jack", "HPOR";
+       };
+#else
+       hdmi_analog_sound: hdmi-analog-sound {
+          status = "okay";
+          compatible = "rockchip,rk3288-hdmi-analog",
+                   "rockchip,rk3368-hdmi-analog";
+          rockchip,model = "rockchip,es8396-codec";
+          rockchip,cpu = <&i2s>;
+          rockchip,codec = <&es8396>, <&hdmi>;
+          rockchip,widgets =
+             "Microphone", "Microphone Jack",
+             "Line", "Microphone Headset",
+             "Headphone", "Headphone Jack";
+          rockchip,routing =
+             "MIC", "Microphone Jack",
+             "DMIC", "Microphone Headset",
+             "Headphone Jack", "LOUTP",
+             "Headphone Jack", "ROUTN";
+       };
+#endif
/kernel/arch/arm/boot/dts/rk3288-evb.dtsi

+#if 0
+       sound: sound {
+          status = "disabled";
+          compatible = "simple-audio-card";
+          simple-audio-card,format = "i2s";
+          simple-audio-card,name = "rockchip,rt5640-codec";
+          simple-audio-card,mclk-fs = <512>;
+          simple-audio-card,widgets =
+             "Microphone", "Microphone Jack",
+             "Headphone", "Headphone Jack";
+          simple-audio-card,routing =
+             "MIC1", "Microphone Jack",
+             "MIC2", "Microphone Jack",
+             "Microphone Jack", "micbias1",
+             "Headphone Jack", "HPOL",
+             "Headphone Jack", "HPOR";
+
+          simple-audio-card,dai-link@0 {
+             format = "i2s";
+             cpu {
+                   sound-dai = <&i2s>;
+             };
+
+             codec {
+                   sound-dai = <&rt5640>;
+             };
         };
+
+          simple-audio-card,dai-link@1 {
+             format = "i2s";
+             cpu {
+                   sound-dai = <&i2s>;
+             };
+
+             codec {
+                   sound-dai = <&hdmi>;
+             };
         };
+          }
+#else
+          es8396-sound {
+          status = "okay";
+          compatible = "simple-audio-card";
+          simple-audio-card,format = "i2s";
+          simple-audio-card,name = "rockchip,es8396-codec";
+          simple-audio-card,mclk-fs = <256>;
+          simple-audio-card,widgets =
+             "Microphone", "Microphone Jack",
+             "Line", "Microphone Headset",
+             "Headphone", "Headphone Jack";
+
+          simple-audio-card,routing =
+             "MIC", "Microphone Jack",
+             "DMIC", "Microphone Headset",
+             "Headphone Jack", "LOUTP",
+             "Headphone Jack", "ROUTN";
+
+          simple-audio-card,dai-link@0 {
+             format = "i2s";
+             cpu {
+                   sound-dai = <&i2s>;
+             };
+
+             codec {
+                   sound-dai = <&es8396>;
+             };
         };
+          simple-audio-card,dai-link@1 {
+             format = "i2s";
+             cpu {
+                   sound-dai = <&i2s>;
+             };
+
+             codec {
+                   sound-dai = <&hdmi>;
+             };
         };
+
      };
+#endif
&i2c2 {
   status = "okay";
+ /*i2c-scl-rising-time-ns = <460>;
+ i2c-scl-falling-time-ns = <15>;*/
+#if 0
   rt5640: rt5640@1c {
      #sound-dai-cells = <0>;
      compatible = "realtek,rt5640";
@@ -307,8 +351,24 @@
      pinctrl-names = "default";
      pinctrl-0 = <&i2s0_mclk>;
   };
+#else
+ es8396: es8396@10 {
+       status = "okay";
+ #sound-dai-cells = <0>;
+       compatible = "es8396";
+       reg = <0x10>;
+       clocks = <&cru SCLK_I2S0_OUT>;
+       clock-names = "mclk";
+       spk-con-gpio = <&gpio6 RK_PA7 GPIO_ACTIVE_HIGH>;
+       //lineout-con-gpio = <&gpio6 RK_PA7 GPIO_ACTIVE_HIGH>
+       pinctrl-names = "default";
+       pinctrl-0 = <&i2s0_mclk>;
+ };
+
+#endif
};
+

编译烧录

确定声卡注册成功：cat /proc/asound/cards

开机日志

现象：播放音乐：hp出声正常，但是喇叭不出声，用i2ctransfer按下列配置寄存器来配置，喇叭能出声

Z20:/data # ./i2ctransfer -f -y 2 w2@0x10 0x75 0x41
Z20:/data # ./i2ctransfer -f -y 2 w2@0x10 0x1a 0x00
Z20:/data # ./i2ctransfer -f -y 2 w2@0x10 0x66 0x00
Z20:/data # ./i2ctransfer -f -y 2 w2@0x10 0x26 0x99
Z20:/data #  ./i2ctransfer -f -y 2 w2@0x10 0x08 0x00
Z20:/data # ./i2ctransfer -f -y 2 w2@0x10 0x3a 0x65
Z20:/data # ./i2ctransfer -f -y 2 w2@0x10 0x6e 0x00
Z20:/data #  ./i2ctransfer -f -y 2 w2@0x10 0x3a 0x21
Z20:/data #  ./i2ctransfer -f -y 2 w2@0x10 0x3c 0x13
Z20:/data # ./i2ctransfer -f -y 2 w2@0x10 0x3d 0x10
Z20:/data # ./i2ctransfer -f -y 2 w2@0x10 0x26 0x88
Z20:/data # ./i2ctransfer -f -y 2 w2@0x10 0x3b 0xff

将此配置写入/kernel/sound/soc/codecs/es8396.c的es8396_pcm_startup函数中
+       //use SPK
+       snd_soc_write(tron_codec, 0x75, 0x41);
+       snd_soc_write(tron_codec, 0x1A, 0x00);
+       snd_soc_write(tron_codec, 0x66, 0x00);
+       snd_soc_write(tron_codec, 0x26, 0x99);
+       snd_soc_write(tron_codec, 0x08, 0x00);
+       snd_soc_write(tron_codec, 0x3A, 0x65);
+       snd_soc_write(tron_codec, 0x6E, 0x00);
+       snd_soc_write(tron_codec, 0x3A, 0x21);
+       snd_soc_write(tron_codec, 0x3C, 0x13);
+       snd_soc_write(tron_codec, 0x3D, 0x10);
+       snd_soc_write(tron_codec, 0x26, 0x88);
+       snd_soc_write(tron_codec, 0x3B, 0xff);
   return 0;
}
最后编译烧录，喇叭正常

声卡播放状态：cat proc/asound/card0/pcm0p/sub0/status