RK3399|[RK3399][Android7.1] 调试笔记 --- 解决开关按键时产生的Pop声
Platform: RK3399
OS: Android 7.1
Kernel: v4.4.83
背景： 按键音在打开和关闭的时候，会有pop声。
原因： 【RK3399|[RK3399][Android7.1] 调试笔记 --- 解决开关按键时产生的Pop声】audio codec后面有个功放，功放一直打开着，当codec打开和关闭的时候，会有噪声带进到功放中。
解决方法： 注：GPIO4_D4是用来控制功放的开关。
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-ecovacs.dts b/arch/arm64/boot/dts/rockchip/rk3399-ecovacs.dts
index 80b31d9..486254b 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-ecovacs.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-ecovacs.dts
@@ -651,8 +651,9 @@
realtek,in1-differential;
pinctrl-names = "default";
pinctrl-0 = <&rt5640_hpcon &i2s_8ch_mclk>;
-hp-con-gpio = <&gpio4 21 GPIO_ACTIVE_HIGH>;
-//hp-det-gpio = <&gpio4 28 GPIO_ACTIVE_LOW>;
+//Kris, 181101, Fix pop sound issue.
+//GPIO4_D4
+spk-ctl-gpio = <&gpio4 28 GPIO_ACTIVE_LOW>;
io-channels = <&saradc 4>;
hp-det-adc-value = https://www.it610.com/article/<500>;
status = "okay";
diff --git a/include/sound/rt5640.h b/include/sound/rt5640.h
index e3c84b9..747aed1 100644
--- a/include/sound/rt5640.h
+++ b/include/sound/rt5640.h
@@ -22,6 +22,9 @@ struct rt5640_platform_data {
bool dmic2_data_pin;
/* 0 = IN1N;
1 = GPIO4 */
int ldo1_en;
/* GPIO for LDO1_EN */
+
+//Kris, 181101, Fix pop sound issue.
+int spk_ctl_gpio;
};
#endif
diff --git a/sound/soc/codecs/rt5640.c b/sound/soc/codecs/rt5640.c
index 5f37d75..ee9d1ba 100644
--- a/sound/soc/codecs/rt5640.c
+++ b/sound/soc/codecs/rt5640.c
@@ -1800,6 +1800,22 @@ static int rt5640_hw_params(struct snd_pcm_substream *substream,
return 0;
}
+
+/*Kris, 181101, Fix pop sound issue.{*/
+static int rt5640_digital_mute(struct snd_soc_dai *dai, int mute)
+{
+struct snd_soc_codec *codec = dai->codec;
+struct rt5640_priv *rt5640 = snd_soc_codec_get_drvdata(codec);
+
+if(mute){
+gpio_direction_output(rt5640->pdata.spk_ctl_gpio, 0);
+} else {
+gpio_direction_output(rt5640->pdata.spk_ctl_gpio, 1);
+}
+return 0;
+}
+/*Kris, 181101, Fix pop sound issue.}*/
+
static int rt5640_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_codec *codec = dai->codec;
@@ -2158,6 +2174,8 @@ static int rt5640_resume(struct snd_soc_codec *codec)
static const struct snd_soc_dai_ops rt5640_aif_dai_ops = {
.hw_params = rt5640_hw_params,
+//Kris, 181101, Fix pop sound issue.
+ .digital_mute = rt5640_digital_mute,
.set_fmt = rt5640_set_dai_fmt,
.set_sysclk = rt5640_set_dai_sysclk,
.set_pll = rt5640_set_dai_pll,
@@ -2272,6 +2290,12 @@ static int rt5640_parse_dt(struct rt5640_priv *rt5640, struct device_node *np)
rt5640->pdata.ldo1_en = of_get_named_gpio(np,
"realtek,ldo1-en-gpios", 0);
+
+ /*Kris, 181101, Fix pop sound issue.{*/
+ rt5640->pdata.spk_ctl_gpio = of_get_named_gpio(np,
+"spk-ctl-gpio", 0);
+ /*Kris, 181101, Fix pop sound issue.}*/
+
/*
* LDO1_EN is optional (it may be statically tied on the board).
* -ENOENT means that the property doesn't exist, i.e. there is no
@@ -2337,6 +2361,19 @@ static int rt5640_i2c_probe(struct i2c_client *i2c,
msleep(400);
}
+ /*Kris, 181101, Fix pop sound issue.{*/
+ if (gpio_is_valid(rt5640->pdata.spk_ctl_gpio)) {
+ret = devm_gpio_request_one(&i2c->dev, rt5640->pdata.spk_ctl_gpio,
+GPIOF_OUT_INIT_LOW,
+"rt5640_spk_ctl");
+if (ret < 0) {
+dev_err(&i2c->dev, "Failed to request rt5640 spk_ctl_gpio %d: %d\n",
+rt5640->pdata.spk_ctl_gpio, ret);
+return ret;
+}
+ }
+ /*Kris, 181101, Fix pop sound issue.}*/
+
ret = regmap_read(rt5640->regmap, RT5640_VENDOR_ID2, &val);
if (ret)
return -EPROBE_DEFER;
推荐阅读
- #|ARM裸机开发（汇编LED灯实验（I.MX6UL芯片））
- QT相关|qt中文的又一解决方法
- STM32|STM32外部中断映射
- Digital|用555定时器产生的N分频器设计
- STM32|STM32的Arduino的引脚映射