diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-1048-Hifiberry-DAC-ADC-Pro-fix-for-the-PLL-when-changing-.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-1048-Hifiberry-DAC-ADC-Pro-fix-for-the-PLL-when-changing-.patch | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-1048-Hifiberry-DAC-ADC-Pro-fix-for-the-PLL-when-changing-.patch b/target/linux/bcm27xx/patches-5.4/950-1048-Hifiberry-DAC-ADC-Pro-fix-for-the-PLL-when-changing-.patch new file mode 100644 index 0000000000..47ecb8b2ce --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-1048-Hifiberry-DAC-ADC-Pro-fix-for-the-PLL-when-changing-.patch @@ -0,0 +1,56 @@ +From c70ae3d1923339746d156bd1d723d141113183aa Mon Sep 17 00:00:00 2001 +From: Joerg Schambacher <joerg@i2audio.com> +Date: Mon, 1 Feb 2021 16:53:46 +0100 +Subject: [PATCH] Hifiberry DAC+ADC Pro fix for the PLL when changing + sample rates + +Adds 2 msecs delay when switching between oscillators to allow +correct PLL settling. +Thanks to Clive Messer for the support! + +Signed-off-by: Joerg Schambacher <joerg@hifiberry.com> +--- + sound/soc/bcm/hifiberry_dacplusadcpro.c | 14 ++++---------- + 1 file changed, 4 insertions(+), 10 deletions(-) + +--- a/sound/soc/bcm/hifiberry_dacplusadcpro.c ++++ b/sound/soc/bcm/hifiberry_dacplusadcpro.c +@@ -190,6 +190,7 @@ static void snd_rpi_hifiberry_dacplusadc + 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_dacplusadc + 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_dacplusadc + 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); + } |