RK3568 开发板-安卓系统之声卡驱动调试（九）

4.6 声卡驱动调试

4.6.1 查看原理图，提取需要配置的信息

4.6.2 需要配置的信息

1、耳机插入检测引脚GPIO3_C2
2、RK809是挂载在I2S1上的，需要确认I2S的配置是否正确

4.6.3 完整的dts配置信息如下

{
    rk_headset: rk-headset {
        compatible = "rockchip_headset";
        headset_gpio = <&gpio3 RK_PC2 GPIO_ACTIVE_HIGH>;
        pinctrl-names = "default";
        pinctrl-0 = <&hp_det>;
        status = "okay";
    };

    rk809_sound: rk809-sound {
        status = "okay";
        compatible = "simple-audio-card";
        simple-audio-card,format = "i2s";
        simple-audio-card,name = "rockchip,rk809-codec";
        simple-audio-card,mclk-fs = <256>;

        simple-audio-card,cpu {
            sound-dai = <&i2s1_8ch>;
        };
        simple-audio-card,codec {
            sound-dai = <&rk809_codec>;
        };
    };
};

&i2c0 {
    status = "okay";
    rk809_codec: codec {
        #sound-dai-cells = <0>;
        compatible = "rockchip,rk809-codec", "rockchip,rk817-codec";
        clocks = <&cru I2S1_MCLKOUT>;
        clock-names = "mclk";
        assigned-clocks = <&cru I2S1_MCLKOUT>, <&cru I2S1_MCLK_TX_IOE>;
        assigned-clock-rates = <12288000>;
        assigned-clock-parents = <&cru I2S1_MCLKOUT_TX>, <&cru I2S1_MCLKOUT_TX>;
        pinctrl-names = "default";
        pinctrl-0 = <&i2s1m0_mclk>;
        hp-volume = <20>;
        spk-volume = <3>;
        mic-in-differential;
        status = "okay";
    };
};

&i2s1_8ch {
    status = "okay";
    rockchip,clk-trcm = <1>;
    pinctrl-names = "default";
    pinctrl-0 = <&i2s1m0_sclktx
             &i2s1m0_lrcktx
             &i2s1m0_sdi0
             &i2s1m0_sdo0>;
};

4.6.4 确认声卡是否注册成功

rk3568_aybering:/ # cat /proc/asound/cards
 0 [rockchiprk809co]: rockchip_rk809- - rockchip,rk809-codec
                      rockchip,rk809-codec
 1 [rockchiphdmi   ]: rockchip_hdmi - rockchip,hdmi
                      rockchip,hdmi
rk3568_aybering:/ #

可以看出, RK809声卡已经成功注册

4.6.5 测试

测试时打开“录音机”进行测试

4.6.5.1 耳机插入检测测试

1、插入耳机，看看插入时状态栏是否有耳机图标显示
2、拨出耳机，看看拨出后状态栏是否无耳机图标显示

4.6.5.2 录音-->放音测试

1、选择带MIC的耳机，插入35mm耳机座，点击录音按钮，先录音一段时间，点击停止后再点击播放进行测试
2、准备好MIC和喇叭，并将MIC和喇叭连接好(A251板接口如下图)，点击录音按钮，先录音一段时间，点击停止后再点击播放进行测试

4.6.5.4 调试问题记录

无论是否插入耳机，耳机图标一直在显示？原因：DTS把耳机插入引脚配置成上拉了。

hale@thinkpad:rk3568_aybering_Android11$ rk356x_android$ git diff a3a2450a532 f398c0a317
diff --git a/kernel/arch/arm64/boot/dts/rockchip/rk3568-evb1-ddr4-v10.dtsi b/kernel/arch/arm64/boot/dts/rockchip/rk3568-evb1-ddr4-v10.dtsi
index a02adea37c..29f738697b 100644
--- a/kernel/arch/arm64/boot/dts/rockchip/rk3568-evb1-ddr4-v10.dtsi
+++ b/kernel/arch/arm64/boot/dts/rockchip/rk3568-evb1-ddr4-v10.dtsi
@@ -18,7 +18,7 @@

        rk_headset: rk-headset {
                compatible = "rockchip_headset";
-               headset_gpio = <&gpio3 RK_PC2 GPIO_ACTIVE_LOW>;
+               headset_gpio = <&gpio3 RK_PC2 GPIO_ACTIVE_HIGH>;
                pinctrl-names = "default";
                pinctrl-0 = <&hp_det>;
                status = "okay";
@@ -540,7 +540,7 @@

        headphone {
                hp_det: hp-det {
-                       rockchip,pins = <3 RK_PC2 RK_FUNC_GPIO &pcfg_pull_down>;
+                       rockchip,pins = <3 RK_PC2 RK_FUNC_GPIO &pcfg_pull_up>;
                };
        };