[PATCH v3 0/3] arm64: dts: imx8m: support more sample rates

[PATCH v3 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.

Previously it only supported 48kHz series rates, with this change the
supported rates will include 44kHz series rates, from 8kHz to 192kHz.

changes in v3:
- Minor change in commit message for comments from Frank Li

changes in v2:
- Add more comments in commit message.

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 v3 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.

Previously it only supported 48kHz series rates, with this change the
supported rates will include 44kHz series rates, from 8kHz to 192kHz.

As commit 17cc308b1833 ("ASoC: wm8524: enable constraints when sysclk is
configured.") make wm8524 release the constraint when codec's sysclk is
not configured, so configure the cpu dai's sysclk to support more rates
with the 'clocks' property removed.

Add mclk-fs property for the sysclk ratio, which is required by
calculating the sysclk, 256 is a common ratio for audio.

'system-clock-direction-out' is a required property after
commit 5725bce709db ("ASoC: simple-card-utils: Unify clock direction by
clk_direction") to specify the clock direction.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Frank Li <Frank.Li@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

[PATCH v3 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.

Previously it only supported 48kHz series rates, with this change the
supported rates will include 44kHz series rates, from 8kHz to 192kHz.

As commit 17cc308b1833 ("ASoC: wm8524: enable constraints when sysclk is
configured.") make wm8524 release the constraint when codec's sysclk is
not configured, so configure the cpu dai's sysclk to support more rates
with the 'clocks' property removed.

Add mclk-fs property for the sysclk ratio, which is required by
calculating the sysclk, 256 is a common ratio for audio.

'system-clock-direction-out' is a required property after
commit 5725bce709db ("ASoC: simple-card-utils: Unify clock direction by
clk_direction") to specify the clock direction.

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 v3 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.

Previously it only supported 48kHz series rates, with this change the
supported rates will include 44kHz series rates, from 8kHz to 192kHz.

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 v3 0/3] arm64: dts: imx8m: support more sample rates

[Peng Fan]

On Fri, Aug 15, 2025 at 06:23:14PM +0800, Shengjiu Wang 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.
>
>Previously it only supported 48kHz series rates, with this change the
>supported rates will include 44kHz series rates, from 8kHz to 192kHz.
>
>changes in v3:
>- Minor change in commit message for comments from Frank Li
>
>changes in v2:
>- Add more comments in commit message.
>
>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(-)

Reviewed-by: Peng Fan <peng.fan@nxp.com>

Re: [PATCH v3 0/3] arm64: dts: imx8m: support more sample rates

[Shawn Guo]

On Fri, Aug 15, 2025 at 06:23:14PM +0800, Shengjiu Wang wrote:
> 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

Applied all, thanks!