Hifiberry DAC+ADC Pro fix for the PLL when changing sample rates

raspberrypi inclusion
category: feature
bugzilla: 50432

--------------------------------

Adds 2 msecs delay when switching between oscillators to allow
correct PLL settling.
Thanks to Clive Messer for the support!
Signed-off-by: NJoerg Schambacher <joerg@hifiberry.com>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

sound/soc/bcm/hifiberry_dacplusadcpro.c

@@ -190,6 +190,7 @@ static void snd_rpi_hifiberry_dacplusadcpro_select_clk(
 				PCM512x_GPIO_CONTROL_1, 0x24, 0x04);
 		break;
 	}
+	usleep_range(2000, 2100);
 }
 
 static void snd_rpi_hifiberry_dacplusadcpro_clk_gpio(struct snd_soc_component *component)
@@ -207,13 +208,6 @@ static bool snd_rpi_hifiberry_dacplusadcpro_is_sclk(struct snd_soc_component *co
 	return (!(sck & 0x40));
 }
 
-static bool snd_rpi_hifiberry_dacplusadcpro_is_sclk_sleep(
-	struct snd_soc_component *component)
-{
-	msleep(2);
-	return snd_rpi_hifiberry_dacplusadcpro_is_sclk(component);
-}
-
 static bool snd_rpi_hifiberry_dacplusadcpro_is_pro_card(struct snd_soc_component *component)
 {
 	bool isClk44EN, isClk48En, isNoClk;
@@ -221,13 +215,13 @@ static bool snd_rpi_hifiberry_dacplusadcpro_is_pro_card(struct snd_soc_component
 	snd_rpi_hifiberry_dacplusadcpro_clk_gpio(component);
 
 	snd_rpi_hifiberry_dacplusadcpro_select_clk(component, HIFIBERRY_DACPRO_CLK44EN);
-	isClk44EN = snd_rpi_hifiberry_dacplusadcpro_is_sclk_sleep(component);
+	isClk44EN = snd_rpi_hifiberry_dacplusadcpro_is_sclk(component);
 
 	snd_rpi_hifiberry_dacplusadcpro_select_clk(component, HIFIBERRY_DACPRO_NOCLOCK);
-	isNoClk = snd_rpi_hifiberry_dacplusadcpro_is_sclk_sleep(component);
+	isNoClk = snd_rpi_hifiberry_dacplusadcpro_is_sclk(component);
 
 	snd_rpi_hifiberry_dacplusadcpro_select_clk(component, HIFIBERRY_DACPRO_CLK48EN);
-	isClk48En = snd_rpi_hifiberry_dacplusadcpro_is_sclk_sleep(component);
+	isClk48En = snd_rpi_hifiberry_dacplusadcpro_is_sclk(component);
 
 	return (isClk44EN && isClk48En && !isNoClk);
 }