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标题: 基于RK3288 平台 Simple card声卡添加及调试 [打印本页]

作者: 17701603601 时间: 2019-7-31 22:38
标题: 基于RK3288 平台 Simple card声卡添加及调试
本帖最后由 17701603601 于 2019-8-3 11:17 编辑

       基于RK3288 平台 Simple card声卡添加及调试
Simple card即简单通用的machine driver，如果simple-card框架足够满足需求，建议优先使用simple card框架，简单，方便，且易用.

一、添加声卡
1. 添加codec driver，比如添加：sound/soc/codec/es8323.c
2. 修改sound/soc/codec/Kconfig以及Makefile加入驱动编译。
sound/soc/codec/Kconfig: 添加
select SND_SOC_ES8323 if I2C
config SND_SOC_ES8323
      tristate "Everest Semi ES8323 CODEC"
      depends on I2C
sound/soc/codec/Makefile: 添加
snd-soc-es8323-objs := es8323.o
obj-$(CONFIG_SND_SOC_ES8323) += snd-soc-es8323.o

3. menuconfig中enable simple card以及codec
make menuconfig Device Drivers ---> Sound card support --->  Advanced Linux Sound Architecture --->  ALSA for SoC audio support --->  ASoC support for Rockchip
CODEC drivers  --->
<*> Everest Semi ES8323 CODEC
4. 产品的DTS中添加Simple Card Node

二、修改DTS文件
1 添加sound card 和 spdif（可选添加，用不到不用添加）
2 添加：&i2c2(es8323 mclk)和&i2s(es8323 I2S通信)
3 添加&sound
  注意，需要增加内容如下：
{\
sound: sound {
            status = "okay";
            compatible = "simple-audio-card";
            simple-audio-card,format = "i2s";
            simple-audio-card,name = "rockchip,firefly-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 = <&es8323>;
                     };
            };

            simple-audio-card,dai-link@1 {
                     format = "i2s";
                     cpu {
                              sound-dai = <&i2s>;
                     };

                     codec {
                              sound-dai = <&hdmi>;
                     };
            };
      };
      spdif_out: spdif-out {
            status = "okay";
            compatible = "linux,spdif-dit";
            #sound-dai-cells = <0>;
      };

      spdif-sound {
            status = "okay";
            compatible = "simple-audio-card";
            simple-audio-card,name = "ROCKCHIP,SPDIF";
            simple-audio-card,cpu {
                     sound-dai = <&spdif>;
            };
            simple-audio-card,codec {
                     sound-dai = <&spdif_out>;
            };

}

&i2c2 {
      status = "okay";

      es8323: es8323@10 {
            status = "okay";
            compatible = "everest,es8323";
            reg = <0x10>;
            spk-con-gpio = <&gpio5 12 GPIO_ACTIVE_LOW>;
//             hp-det-gpio = <&gpio7 15 GPIO_ACTIVE_LOW>;
            clock-names = "mclk";
            clocks = <&cru SCLK_I2S0_OUT>;
            pinctrl-names = "default";
            pinctrl-0 = <&i2s0_mclk>;
            #sound-dai-cells = <0>;
      };
};
需要注意的是，如上es8323的clocks即mclk， upstream代码遵循谁使用clk谁申请的原则，所以后续自己添加的codec driver，如果有使用

外部clk作为mclk，需要做同样的适配。

&i2s {
      #sound-dai-cells = <0>;
      status = "okay";
};
&sound {
      status = "okay";
};

注意要去掉以下内容，否则声卡驱动无法挂载
&es8323 {
//    aux-det-gpio = <&gpio2 15 GPIO_ACTIVE_HIGH>;
      spk-ctl-gpio = <&gpio7 2 GPIO_ACTIVE_HIGH>;
};
三、总结
1 屏幕不亮的问题
  调试中发现屏幕背光是亮的，但是屏幕不亮，把vcc_sys_5v: vcc-sys-5v，gpio GPIO0_B5 修改为GPIO7_A3屏幕就亮了。
如下所示：
      vcc_sys_5v: vcc-sys-5v{
            compatible = "regulator-fixed";
            enable-active-high;
            gpio = <&gpio7 3 GPIO_ACTIVE_HIGH>;
            pinctrl-names = "default";
            pinctrl-0 = <&pwr5v_en>;
            regulator-name = "vcc_sys_5v";
            regulator-min-microvolt = <5000000>;
            regulator-max-microvolt = <5000000>;
            regulator-always-on;
            regulator-boot-on;
      };

      vcc-sys {
            pwr5v_en: pwr5v-en {
                     rockchip,pins = <7 3 RK_FUNC_GPIO &pcfg_output_high>;
            };
      };
2 调试中声卡总是挂载不上去：在dts中去掉以下内容后就可以了。因为在I2C2中已经设置过
&es8323 {
//    aux-det-gpio = <&gpio2 15 GPIO_ACTIVE_HIGH>;
      spk-ctl-gpio = <&gpio7 2 GPIO_ACTIVE_HIGH>;
};

作者: 17701603601 时间: 2019-8-1 09:19
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作者: lqc14 时间: 2024-11-1 16:01
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