[PATCH 0/3] arm64: dts: imx8m: support more sample rates

[PATCH 0/3] arm64: dts: imx8m: support more sample rates

[Shengjiu Wang]

The wm8524 codec is connected to the SAI interface. There are two audio
plls on i.MX8MQ, i.MX8MM, i.MX8MN, one pll can be the clock source of
44kHz series rates, another pll can be clock source of 48kHz series rates.

Shengjiu Wang (3):
  arm64: dts: imx8mm-evk: support more sample rates for wm8524 card
  arm64: dts: imx8mq-evk: support more sample rates for wm8524 card
  arm64: dts: imx8mn-evk: support more sample rates for wm8524 card

 arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi | 17 +++++++++++++----
 arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi |  5 +++++
 arch/arm64/boot/dts/freescale/imx8mq-evk.dts  |  8 +++++++-
 3 files changed, 25 insertions(+), 5 deletions(-)

-- 
2.34.1

[PATCH 1/3] arm64: dts: imx8mm-evk: support more sample rates for wm8524 card

[Shengjiu Wang]

The wm8524 codec is connected to the SAI interface. There are two audio
plls on i.MX8MM, one pll can be the clock source of 44kHz series rates,
another pll can be clock source of 48kHz series rates.

Add mclk-fs property for the clock ratio, remove 'clocks' property for
codec that doesn't need to handle clock enablement, add
'system-clock-direction-out' for clock is from cpu dai.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
index 622caaa78eaf..ff7ca2075230 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
@@ -147,6 +147,7 @@ sound-wm8524 {
 		simple-audio-card,format = "i2s";
 		simple-audio-card,frame-master = <&cpudai>;
 		simple-audio-card,bitclock-master = <&cpudai>;
+		simple-audio-card,mclk-fs = <256>;
 		simple-audio-card,widgets =
 			"Line", "Left Line Out Jack",
 			"Line", "Right Line Out Jack";
@@ -158,11 +159,11 @@ cpudai: simple-audio-card,cpu {
 			sound-dai = <&sai3>;
 			dai-tdm-slot-num = <2>;
 			dai-tdm-slot-width = <32>;
+			system-clock-direction-out;
 		};
 
 		simple-audio-card,codec {
 			sound-dai = <&wm8524>;
-			clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
 		};
 	};
 
@@ -570,9 +571,17 @@ &sai2 {
 &sai3 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_sai3>;
-	assigned-clocks = <&clk IMX8MM_CLK_SAI3>;
-	assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
-	assigned-clock-rates = <24576000>;
+	assigned-clocks = <&clk IMX8MM_AUDIO_PLL1>,
+			  <&clk IMX8MM_AUDIO_PLL2>,
+			  <&clk IMX8MM_CLK_SAI3>;
+	assigned-clock-parents = <0>, <0>, <&clk IMX8MM_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <393216000>, <361267200>, <24576000>;
+	fsl,sai-mclk-direction-output;
+	clocks = <&clk IMX8MM_CLK_SAI3_IPG>, <&clk IMX8MM_CLK_DUMMY>,
+		<&clk IMX8MM_CLK_SAI3_ROOT>, <&clk IMX8MM_CLK_DUMMY>,
+		<&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_AUDIO_PLL1_OUT>,
+		<&clk IMX8MM_AUDIO_PLL2_OUT>;
+	clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3", "pll8k", "pll11k";
 	status = "okay";
 };
 
-- 
2.34.1

Re: [PATCH 1/3] arm64: dts: imx8mm-evk: support more sample rates for wm8524 card

[Frank Li]

On Wed, Jul 16, 2025 at 02:11:12PM +0800, Shengjiu Wang wrote:
> The wm8524 codec is connected to the SAI interface. There are two audio
> plls on i.MX8MM, one pll can be the clock source of 44kHz series rates,
> another pll can be clock source of 48kHz series rates.
>
> Add mclk-fs property for the clock ratio, remove 'clocks' property for
> codec that doesn't need to handle clock enablement, add
> 'system-clock-direction-out' for clock is from cpu dai.

Can you provide the reason why need such change?

>
> Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
> ---
>  arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi | 17 +++++++++++++----
>  1 file changed, 13 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
> index 622caaa78eaf..ff7ca2075230 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
> @@ -147,6 +147,7 @@ sound-wm8524 {
>  		simple-audio-card,format = "i2s";
>  		simple-audio-card,frame-master = <&cpudai>;
>  		simple-audio-card,bitclock-master = <&cpudai>;
> +		simple-audio-card,mclk-fs = <256>;

what's measn 256? Do you need mention in commit message?

Frank
>  		simple-audio-card,widgets =
>  			"Line", "Left Line Out Jack",
>  			"Line", "Right Line Out Jack";
> @@ -158,11 +159,11 @@ cpudai: simple-audio-card,cpu {
>  			sound-dai = <&sai3>;
>  			dai-tdm-slot-num = <2>;
>  			dai-tdm-slot-width = <32>;
> +			system-clock-direction-out;
>  		};
>
>  		simple-audio-card,codec {
>  			sound-dai = <&wm8524>;
> -			clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
>  		};
>  	};
>
> @@ -570,9 +571,17 @@ &sai2 {
>  &sai3 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_sai3>;
> -	assigned-clocks = <&clk IMX8MM_CLK_SAI3>;
> -	assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
> -	assigned-clock-rates = <24576000>;
> +	assigned-clocks = <&clk IMX8MM_AUDIO_PLL1>,
> +			  <&clk IMX8MM_AUDIO_PLL2>,
> +			  <&clk IMX8MM_CLK_SAI3>;
> +	assigned-clock-parents = <0>, <0>, <&clk IMX8MM_AUDIO_PLL1_OUT>;
> +	assigned-clock-rates = <393216000>, <361267200>, <24576000>;
> +	fsl,sai-mclk-direction-output;
> +	clocks = <&clk IMX8MM_CLK_SAI3_IPG>, <&clk IMX8MM_CLK_DUMMY>,
> +		<&clk IMX8MM_CLK_SAI3_ROOT>, <&clk IMX8MM_CLK_DUMMY>,
> +		<&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_AUDIO_PLL1_OUT>,
> +		<&clk IMX8MM_AUDIO_PLL2_OUT>;
> +	clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3", "pll8k", "pll11k";
>  	status = "okay";
>  };
>
> --
> 2.34.1
>

Re: [PATCH 1/3] arm64: dts: imx8mm-evk: support more sample rates for wm8524 card

[Shengjiu Wang]

On Thu, Jul 17, 2025 at 3:17 AM Frank Li <Frank.li@nxp.com> wrote:
>
> On Wed, Jul 16, 2025 at 02:11:12PM +0800, Shengjiu Wang wrote:
> > The wm8524 codec is connected to the SAI interface. There are two audio
> > plls on i.MX8MM, one pll can be the clock source of 44kHz series rates,
> > another pll can be clock source of 48kHz series rates.
> >
> > Add mclk-fs property for the clock ratio, remove 'clocks' property for
> > codec that doesn't need to handle clock enablement, add
> > 'system-clock-direction-out' for clock is from cpu dai.
>
> Can you provide the reason why need such change?

As commit
17cc308b1833 ASoC: wm8524: enable constraints when sysclk is configured.
make wm8524 release the constraint when codec's sysclk is not configured
so we can configure the cpu dai's sysclk to support more rates. previously it
only support 48k series rates, now it can support 44k series rates.

will add these info is commit message.

>
> >
> > Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
> > ---
> >  arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi | 17 +++++++++++++----
> >  1 file changed, 13 insertions(+), 4 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
> > index 622caaa78eaf..ff7ca2075230 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
> > @@ -147,6 +147,7 @@ sound-wm8524 {
> >               simple-audio-card,format = "i2s";
> >               simple-audio-card,frame-master = <&cpudai>;
> >               simple-audio-card,bitclock-master = <&cpudai>;
> > +             simple-audio-card,mclk-fs = <256>;
>
> what's measn 256? Do you need mention in commit message?

mclk-fs is the ratio to calculate the sysclk,  sysclk = mclk-fs * sample rate.
256 is a common ratio for audio.

will add these info in commit message.

best regards
Shengjiu Wang
>
> Frank
> >               simple-audio-card,widgets =
> >                       "Line", "Left Line Out Jack",
> >                       "Line", "Right Line Out Jack";
> > @@ -158,11 +159,11 @@ cpudai: simple-audio-card,cpu {
> >                       sound-dai = <&sai3>;
> >                       dai-tdm-slot-num = <2>;
> >                       dai-tdm-slot-width = <32>;
> > +                     system-clock-direction-out;
> >               };
> >
> >               simple-audio-card,codec {
> >                       sound-dai = <&wm8524>;
> > -                     clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
> >               };
> >       };
> >
> > @@ -570,9 +571,17 @@ &sai2 {
> >  &sai3 {
> >       pinctrl-names = "default";
> >       pinctrl-0 = <&pinctrl_sai3>;
> > -     assigned-clocks = <&clk IMX8MM_CLK_SAI3>;
> > -     assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
> > -     assigned-clock-rates = <24576000>;
> > +     assigned-clocks = <&clk IMX8MM_AUDIO_PLL1>,
> > +                       <&clk IMX8MM_AUDIO_PLL2>,
> > +                       <&clk IMX8MM_CLK_SAI3>;
> > +     assigned-clock-parents = <0>, <0>, <&clk IMX8MM_AUDIO_PLL1_OUT>;
> > +     assigned-clock-rates = <393216000>, <361267200>, <24576000>;
> > +     fsl,sai-mclk-direction-output;
> > +     clocks = <&clk IMX8MM_CLK_SAI3_IPG>, <&clk IMX8MM_CLK_DUMMY>,
> > +             <&clk IMX8MM_CLK_SAI3_ROOT>, <&clk IMX8MM_CLK_DUMMY>,
> > +             <&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_AUDIO_PLL1_OUT>,
> > +             <&clk IMX8MM_AUDIO_PLL2_OUT>;
> > +     clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3", "pll8k", "pll11k";
> >       status = "okay";
> >  };
> >
> > --
> > 2.34.1
> >

[PATCH 2/3] arm64: dts: imx8mq-evk: support more sample rates for wm8524 card

[Shengjiu Wang]

The wm8524 codec is connected to the SAI interface. There are two audio
plls on i.MX8MQ, one pll can be the clock source of 44kHz series rates,
another pll can be clock source of 48kHz series rates.

Add mclk-fs property for the clock ratio, remove 'clocks' property for
codec that doesn't need to handle clock enablement, add
'system-clock-direction-out' for clock is from cpu dai.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
index 43e45b0bd0d1..a88bc9034663 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
@@ -108,6 +108,7 @@ sound-wm8524 {
 		simple-audio-card,format = "i2s";
 		simple-audio-card,frame-master = <&cpudai>;
 		simple-audio-card,bitclock-master = <&cpudai>;
+		simple-audio-card,mclk-fs = <256>;
 		simple-audio-card,widgets =
 			"Line", "Left Line Out Jack",
 			"Line", "Right Line Out Jack";
@@ -117,11 +118,11 @@ sound-wm8524 {
 
 		cpudai: simple-audio-card,cpu {
 			sound-dai = <&sai2>;
+			system-clock-direction-out;
 		};
 
 		link_codec: simple-audio-card,codec {
 			sound-dai = <&wm8524>;
-			clocks = <&clk IMX8MQ_CLK_SAI2_ROOT>;
 		};
 	};
 
@@ -440,6 +441,11 @@ &sai2 {
 	assigned-clocks = <&clk IMX8MQ_AUDIO_PLL1_BYPASS>, <&clk IMX8MQ_CLK_SAI2>;
 	assigned-clock-parents = <&clk IMX8MQ_AUDIO_PLL1>, <&clk IMX8MQ_AUDIO_PLL1_OUT>;
 	assigned-clock-rates = <0>, <24576000>;
+	clocks = <&clk IMX8MQ_CLK_SAI2_IPG>, <&clk IMX8MQ_CLK_DUMMY>,
+		<&clk IMX8MQ_CLK_SAI2_ROOT>, <&clk IMX8MQ_CLK_DUMMY>,
+		<&clk IMX8MQ_CLK_DUMMY>, <&clk IMX8MQ_AUDIO_PLL1_OUT>,
+		<&clk IMX8MQ_AUDIO_PLL2_OUT>;
+	clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3", "pll8k", "pll11k";
 	status = "okay";
 };
 
-- 
2.34.1

[PATCH 3/3] arm64: dts: imx8mn-evk: support more sample rates for wm8524 card

[Shengjiu Wang]

The wm8524 codec is connected to the SAI interface. There are two audio
plls on i.MX8MN, one pll can be the clock source of 44kHz series rates,
another pll can be clock source of 48kHz series rates.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
index 33d73f3dc187..145355ff91b4 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
@@ -387,6 +387,11 @@ &sai3 {
 	assigned-clock-parents = <&clk IMX8MN_AUDIO_PLL1_OUT>;
 	assigned-clock-rates = <24576000>;
 	fsl,sai-mclk-direction-output;
+	clocks = <&clk IMX8MN_CLK_SAI3_IPG>, <&clk IMX8MN_CLK_DUMMY>,
+		<&clk IMX8MN_CLK_SAI3_ROOT>, <&clk IMX8MN_CLK_DUMMY>,
+		<&clk IMX8MN_CLK_DUMMY>, <&clk IMX8MN_AUDIO_PLL1_OUT>,
+		<&clk IMX8MN_AUDIO_PLL2_OUT>;
+	clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3", "pll8k", "pll11k";
 	status = "okay";
 };
 
-- 
2.34.1

Re: [PATCH 0/3] arm64: dts: imx8m: support more sample rates

[Daniel Baluta]

On Wed, Jul 16, 2025 at 9:11 AM Shengjiu Wang <shengjiu.wang@nxp.com> wrote:
>
> The wm8524 codec is connected to the SAI interface. There are two audio
> plls on i.MX8MQ, i.MX8MM, i.MX8MN, one pll can be the clock source of
> 44kHz series rates, another pll can be clock source of 48kHz series rates.
>
> Shengjiu Wang (3):
>   arm64: dts: imx8mm-evk: support more sample rates for wm8524 card
>   arm64: dts: imx8mq-evk: support more sample rates for wm8524 card
>   arm64: dts: imx8mn-evk: support more sample rates for wm8524 card

Hi Shengjiu,

I think it would be useful to specify which are the current supported rates
and which will be the ones supported after your patch  (in the commit messages).

On NXP BSP you can run:

../../unit_tests/Audio/mxc_alsa_hw_params.out hw:X,Y p r

to get the rates.

Re: [PATCH 0/3] arm64: dts: imx8m: support more sample rates

[Shengjiu Wang]

On Wed, Jul 16, 2025 at 3:53 PM Daniel Baluta <daniel.baluta@gmail.com> wrote:
>
> On Wed, Jul 16, 2025 at 9:11 AM Shengjiu Wang <shengjiu.wang@nxp.com> wrote:
> >
> > The wm8524 codec is connected to the SAI interface. There are two audio
> > plls on i.MX8MQ, i.MX8MM, i.MX8MN, one pll can be the clock source of
> > 44kHz series rates, another pll can be clock source of 48kHz series rates.
> >
> > Shengjiu Wang (3):
> >   arm64: dts: imx8mm-evk: support more sample rates for wm8524 card
> >   arm64: dts: imx8mq-evk: support more sample rates for wm8524 card
> >   arm64: dts: imx8mn-evk: support more sample rates for wm8524 card
>
> Hi Shengjiu,
>
> I think it would be useful to specify which are the current supported rates
> and which will be the ones supported after your patch  (in the commit messages).
>
yes, will update the commit message to make it more clear.

best regards
Shengjiu Wang

> On NXP BSP you can run:
>
> ../../unit_tests/Audio/mxc_alsa_hw_params.out hw:X,Y p r
>
> to get the rates.