[PATCH] arm64: dts: imx8mm-beacon: Enable Digitial Microphone

[PATCH] arm64: dts: imx8mm-beacon: Enable Digitial Microphone

[Adam Ford]

There is a PDM microphone port on the baseboard which is connected to the
micfil controller.  Create a new sound card to support this interface.

Signed-off-by: Adam Ford <aford173@gmail.com>

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
index 03266bd90a06..16444954f873 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
@@ -98,7 +98,7 @@ reg_usdhc2_vmmc: regulator-usdhc2 {
 		enable-active-high;
 	};
 
-	sound {
+	sound-codec {
 		compatible = "fsl,imx-audio-wm8962";
 		model = "wm8962-audio";
 		audio-cpu = <&sai3>;
@@ -111,6 +111,18 @@ sound {
 			"AMIC", "MICBIAS",
 			"IN3R", "AMIC";
 	};
+
+	sound-micfil {
+		compatible = "fsl,imx-audio-card";
+		model = "imx-audio-micfil";
+		pri-dai-link {
+			link-name = "micfil hifi";
+			format = "i2s";
+			cpu {
+				sound-dai = <&micfil>;
+			};
+		};
+	};
 };
 
 &csi {
@@ -215,6 +227,16 @@ pca6416_1: gpio@21 {
 	};
 };
 
+&micfil {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pdm>;
+	assigned-clocks = <&clk IMX8MM_CLK_PDM>;
+	assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <196608000>;
+	#sound-dai-cells = <0>;
+	status = "okay";
+};
+
 &mipi_csi {
 	status = "okay";
 	ports {
@@ -354,6 +376,13 @@ MX8MM_IOMUXC_SAI2_MCLK_GPIO4_IO27		0x19
 		>;
 	};
 
+	pinctrl_pdm: pdmgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_RXC_PDM_CLK		0xd6
+			MX8MM_IOMUXC_SAI5_RXD0_PDM_DATA0	0xd6
+		>;
+	};
+
 	pinctrl_reg_usb_otg1: usbotg1grp {
 		fsl,pins = <
 			MX8MM_IOMUXC_SAI3_RXC_GPIO4_IO29     0x19
-- 
2.34.1

[PATCH 1/6] arm64: dts: imx8mn-beacon: Enable Digitial Microphone

[Adam Ford]

There is a PDM microphone on the baseboard which is connected to the
micfil controller.  Create a new sound card to support this interface.

Signed-off-by: Adam Ford <aford173@gmail.com>

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
index 9e82069c941f..fa66cc9bf455 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
@@ -63,7 +63,7 @@ reg_usb_otg_vbus: regulator-usb {
 		enable-active-high;
 	};
 
-	sound {
+	sound-codec {
 		compatible = "fsl,imx-audio-wm8962";
 		model = "wm8962-audio";
 		audio-cpu = <&sai3>;
@@ -76,6 +76,18 @@ sound {
 			"AMIC", "MICBIAS",
 			"IN3R", "AMIC";
 	};
+
+	sound-micfil {
+		compatible = "fsl,imx-audio-card";
+		model = "imx-audio-micfil";
+		pri-dai-link {
+			link-name = "micfil hifi";
+			format = "i2s";
+			cpu {
+				sound-dai = <&micfil>;
+			};
+		};
+	};
 };
 
 &ecspi2 {
@@ -150,6 +162,16 @@ &easrc {
 	status = "okay";
 };
 
+&micfil {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pdm>;
+	assigned-clocks = <&clk IMX8MN_CLK_PDM>;
+	assigned-clock-parents = <&clk IMX8MN_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <196608000>;
+	status = "okay";
+	#sound-dai-cells = <0>;
+};
+
 &sai3 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_sai3>;
@@ -232,6 +254,13 @@ MX8MN_IOMUXC_SAI2_MCLK_GPIO4_IO27		0x19
 		>;
 	};
 
+	pinctrl_pdm: pdmgrp {
+		fsl,pins = <
+			MX8MN_IOMUXC_SAI5_RXC_PDM_CLK	0xd6
+			MX8MN_IOMUXC_SAI5_RXD0_PDM_BIT_STREAM0	0xd6
+		>;
+	};
+
 	pinctrl_reg_usb_otg: reg-otggrp {
 		fsl,pins = <
 			MX8MN_IOMUXC_SAI3_RXC_GPIO4_IO29     0x19
-- 
2.34.1

[PATCH 2/6] arm64: dts: imx8mn-beacon: Enable SPDIF Sound card

[Adam Ford]

Add a sound card to support SPDIF since the imx8mn-beacon baseboard
can support it.

Signed-off-by: Adam Ford <aford173@gmail.com>

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
index fa66cc9bf455..224845d24b64 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
@@ -88,6 +88,14 @@ cpu {
 			};
 		};
 	};
+
+	sound-spdif {
+		compatible = "fsl,imx-audio-spdif";
+		model = "imx-spdif";
+		spdif-controller = <&spdif1>;
+		spdif-out;
+		spdif-in;
+	};
 };
 
 &ecspi2 {
@@ -186,6 +194,23 @@ &snvs_pwrkey {
 	status = "okay";
 };
 
+&spdif1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_spdif1>;
+	assigned-clocks = <&clk IMX8MN_CLK_SPDIF1>;
+	assigned-clock-parents = <&clk IMX8MN_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <24576000>;
+	clocks = <&clk IMX8MN_CLK_AUDIO_AHB>, <&clk IMX8MN_CLK_24M>,
+		<&clk IMX8MN_CLK_SPDIF1>, <&clk IMX8MN_CLK_DUMMY>,
+		<&clk IMX8MN_CLK_DUMMY>, <&clk IMX8MN_CLK_DUMMY>,
+		<&clk IMX8MN_CLK_AUDIO_AHB>, <&clk IMX8MN_CLK_DUMMY>,
+		<&clk IMX8MN_CLK_DUMMY>, <&clk IMX8MN_CLK_DUMMY>,
+		<&clk IMX8MN_AUDIO_PLL1_OUT>, <&clk IMX8MN_AUDIO_PLL2_OUT>;
+	clock-names = "core", "rxtx0", "rxtx1", "rxtx2", "rxtx3",
+		"rxtx4", "rxtx5", "rxtx6", "rxtx7", "spba", "pll8k", "pll11k";
+	status = "okay";
+};
+
 &uart2 { /* console */
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart2>;
@@ -277,6 +302,13 @@ MX8MN_IOMUXC_SAI3_RXD_SAI3_RX_DATA0	0xd6
 		>;
 	};
 
+	pinctrl_spdif1: spdif1grp {
+		fsl,pins = <
+			MX8MN_IOMUXC_SPDIF_TX_SPDIF1_OUT	0xd6
+			MX8MN_IOMUXC_SPDIF_RX_SPDIF1_IN	0xd6
+		>;
+	};
+
 	pinctrl_uart2: uart2grp {
 		fsl,pins = <
 			MX8MN_IOMUXC_UART2_RXD_UART2_DCE_RX	0x140
-- 
2.34.1

[PATCH 3/6] arm64: dts: Associate easrc to the audio CODEC

[Adam Ford]

There is a wm8962 Audio codec already enabled, and the
EASRC is also enabled, but there is nothing connecting them to each
other. Set audio-asrc to point to easrc.

Signed-off-by: Adam Ford <aford173@gmail.com>

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
index 224845d24b64..f31ba1101a1d 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-beacon-baseboard.dtsi
@@ -67,6 +67,7 @@ sound-codec {
 		compatible = "fsl,imx-audio-wm8962";
 		model = "wm8962-audio";
 		audio-cpu = <&sai3>;
+		audio-asrc = <&easrc>;
 		audio-codec = <&wm8962>;
 		audio-routing =
 			"Headphone Jack", "HPOUTL",
-- 
2.34.1

[PATCH 4/6] arm64: dts: imx8mm-beacon: Enable Digitial Microphone

[Adam Ford]

There is a PDM microphone port on the baseboard which is connected to the
micfil controller.  Create a new sound card to support this interface.

Signed-off-by: Adam Ford <aford173@gmail.com>

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
index 03266bd90a06..16444954f873 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
@@ -98,7 +98,7 @@ reg_usdhc2_vmmc: regulator-usdhc2 {
 		enable-active-high;
 	};
 
-	sound {
+	sound-codec {
 		compatible = "fsl,imx-audio-wm8962";
 		model = "wm8962-audio";
 		audio-cpu = <&sai3>;
@@ -111,6 +111,18 @@ sound {
 			"AMIC", "MICBIAS",
 			"IN3R", "AMIC";
 	};
+
+	sound-micfil {
+		compatible = "fsl,imx-audio-card";
+		model = "imx-audio-micfil";
+		pri-dai-link {
+			link-name = "micfil hifi";
+			format = "i2s";
+			cpu {
+				sound-dai = <&micfil>;
+			};
+		};
+	};
 };
 
 &csi {
@@ -215,6 +227,16 @@ pca6416_1: gpio@21 {
 	};
 };
 
+&micfil {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pdm>;
+	assigned-clocks = <&clk IMX8MM_CLK_PDM>;
+	assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <196608000>;
+	#sound-dai-cells = <0>;
+	status = "okay";
+};
+
 &mipi_csi {
 	status = "okay";
 	ports {
@@ -354,6 +376,13 @@ MX8MM_IOMUXC_SAI2_MCLK_GPIO4_IO27		0x19
 		>;
 	};
 
+	pinctrl_pdm: pdmgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_RXC_PDM_CLK		0xd6
+			MX8MM_IOMUXC_SAI5_RXD0_PDM_DATA0	0xd6
+		>;
+	};
+
 	pinctrl_reg_usb_otg1: usbotg1grp {
 		fsl,pins = <
 			MX8MM_IOMUXC_SAI3_RXC_GPIO4_IO29     0x19
-- 
2.34.1

[PATCH 5/6] arm64: dts: imx8mm-beacon: Enable SPDIF Sound card

[Adam Ford]

Add a sound card to support SPDIF since the imx8mn-beacon baseboard
can support it.

Signed-off-by: Adam Ford <aford173@gmail.com>

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
index 16444954f873..c41359c74c50 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
@@ -123,6 +123,14 @@ cpu {
 			};
 		};
 	};
+
+	sound-spdif {
+		compatible = "fsl,imx-audio-spdif";
+		model = "imx-spdif";
+		spdif-controller = <&spdif1>;
+		spdif-out;
+		spdif-in;
+	};
 };
 
 &csi {
@@ -289,6 +297,23 @@ &snvs_pwrkey {
 	status = "okay";
 };
 
+&spdif1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_spdif1>;
+	assigned-clocks = <&clk IMX8MM_CLK_SPDIF1>;
+	assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <24576000>;
+	clocks = <&clk IMX8MM_CLK_AUDIO_AHB>, <&clk IMX8MM_CLK_24M>,
+		<&clk IMX8MM_CLK_SPDIF1>, <&clk IMX8MM_CLK_DUMMY>,
+		<&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>,
+		<&clk IMX8MM_CLK_AUDIO_AHB>, <&clk IMX8MM_CLK_DUMMY>,
+		<&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>,
+		<&clk IMX8MM_AUDIO_PLL1_OUT>, <&clk IMX8MM_AUDIO_PLL2_OUT>;
+	clock-names = "core", "rxtx0", "rxtx1", "rxtx2", "rxtx3",
+		"rxtx4", "rxtx5", "rxtx6", "rxtx7", "spba", "pll8k", "pll11k";
+	status = "okay";
+};
+
 &uart2 { /* console */
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart2>;
@@ -405,6 +430,14 @@ MX8MM_IOMUXC_SAI3_RXD_SAI3_RX_DATA0	0xd6
 		>;
 	};
 
+	pinctrl_spdif1: spdif1grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SPDIF_TX_SPDIF1_OUT	0xd6
+			MX8MM_IOMUXC_SPDIF_RX_SPDIF1_IN		0xd6
+			MX8MM_IOMUXC_SPDIF_EXT_CLK_SPDIF1_EXT_CLK	0xd6
+		>;
+	};
+
 	pinctrl_uart2: uart2grp {
 		fsl,pins = <
 			MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX	0x140
-- 
2.34.1

[PATCH 6/6] arm64: defconfig: Enable imx-audio-card

[Adam Ford]

Both the imx8mm-beacon and imx8mn-beacon kits have a PDM microphone
port. The PDM is used with micfil driver, and that is associated to
imx-audio-card, but that is not currently enabled by default.  Enable it
as a module.

Signed-off-by: Adam Ford <aford173@gmail.com>

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index d3ad1cb2f5eb..2a824590811b 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -792,6 +792,7 @@ CONFIG_SND_SOC_IMX_SGTL5000=m
 CONFIG_SND_SOC_IMX_SPDIF=m
 CONFIG_SND_SOC_FSL_ASOC_CARD=m
 CONFIG_SND_SOC_IMX_AUDMIX=m
+CONFIG_SND_SOC_IMX_CARD=m
 CONFIG_SND_MESON_AXG_SOUND_CARD=m
 CONFIG_SND_MESON_GX_SOUND_CARD=m
 CONFIG_SND_SOC_QCOM=m
-- 
2.34.1

Re: [PATCH 4/6] arm64: dts: imx8mm-beacon: Enable Digitial Microphone

[Sascha Hauer]

Hi Adam,

On Sun, Jul 17, 2022 at 01:09:58PM -0500, Adam Ford wrote:
> There is a PDM microphone port on the baseboard which is connected to the
> micfil controller.  Create a new sound card to support this interface.
> 
> Signed-off-by: Adam Ford <aford173@gmail.com>
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
> index 03266bd90a06..16444954f873 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
> @@ -98,7 +98,7 @@ reg_usdhc2_vmmc: regulator-usdhc2 {
>  		enable-active-high;
>  	};
>  
> -	sound {
> +	sound-codec {
>  		compatible = "fsl,imx-audio-wm8962";
>  		model = "wm8962-audio";
>  		audio-cpu = <&sai3>;
> @@ -111,6 +111,18 @@ sound {
>  			"AMIC", "MICBIAS",
>  			"IN3R", "AMIC";
>  	};
> +
> +	sound-micfil {
> +		compatible = "fsl,imx-audio-card";
> +		model = "imx-audio-micfil";
> +		pri-dai-link {
> +			link-name = "micfil hifi";
> +			format = "i2s";
> +			cpu {
> +				sound-dai = <&micfil>;
> +			};
> +		};
> +	};

Note the micfil works well with the simple-audio-card driver which might
be an alternative here.

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

Re: [PATCH 4/6] arm64: dts: imx8mm-beacon: Enable Digitial Microphone

[Adam Ford]

On Mon, Jul 18, 2022 at 12:37 AM Sascha Hauer <s.hauer@pengutronix.de> wrote:
>
> Hi Adam,
>
> On Sun, Jul 17, 2022 at 01:09:58PM -0500, Adam Ford wrote:
> > There is a PDM microphone port on the baseboard which is connected to the
> > micfil controller.  Create a new sound card to support this interface.
> >
> > Signed-off-by: Adam Ford <aford173@gmail.com>
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
> > index 03266bd90a06..16444954f873 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
> > @@ -98,7 +98,7 @@ reg_usdhc2_vmmc: regulator-usdhc2 {
> >               enable-active-high;
> >       };
> >
> > -     sound {
> > +     sound-codec {
> >               compatible = "fsl,imx-audio-wm8962";
> >               model = "wm8962-audio";
> >               audio-cpu = <&sai3>;
> > @@ -111,6 +111,18 @@ sound {
> >                       "AMIC", "MICBIAS",
> >                       "IN3R", "AMIC";
> >       };
> > +
> > +     sound-micfil {
> > +             compatible = "fsl,imx-audio-card";
> > +             model = "imx-audio-micfil";
> > +             pri-dai-link {
> > +                     link-name = "micfil hifi";
> > +                     format = "i2s";
> > +                     cpu {
> > +                             sound-dai = <&micfil>;
> > +                     };
> > +             };
> > +     };
>
> Note the micfil works well with the simple-audio-card driver which might
> be an alternative here.

I'll respin it with that and try it.  If it works we should be able to
drop the last patch enabling the imx-audio-card module.

adam
>
> Sascha
>
> --
> Pengutronix e.K.                           |                             |
> Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
> 31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
> Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

Re: [PATCH 1/6] arm64: dts: imx8mn-beacon: Enable Digitial Microphone

[Ahmad Fatoum]

Hello Adam,

On 17.07.22 20:09, Adam Ford wrote:
> +
> +	sound-micfil {
> +		compatible = "fsl,imx-audio-card";
> +		model = "imx-audio-micfil";
> +		pri-dai-link {
> +			link-name = "micfil hifi";
> +			format = "i2s";

Given that MICFIL and mic speak PDM with each other,
is i2s the correct format here?

Cheers,
Ahmad

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

Re: [PATCH 1/6] arm64: dts: imx8mn-beacon: Enable Digitial Microphone

[Adam Ford]

On Tue, Jul 19, 2022 at 12:57 AM Ahmad Fatoum <a.fatoum@pengutronix.de> wrote:
>
> Hello Adam,
>
> On 17.07.22 20:09, Adam Ford wrote:
> > +
> > +     sound-micfil {
> > +             compatible = "fsl,imx-audio-card";
> > +             model = "imx-audio-micfil";
> > +             pri-dai-link {
> > +                     link-name = "micfil hifi";
> > +                     format = "i2s";
>
> Given that MICFIL and mic speak PDM with each other,
> is i2s the correct format here?

I was basing this off some references from some NXP stuff in their
downstream kernel.  I know the audio I record with the PDM microphone
worked and sounded like I expected when I tested it.

adam

>
> Cheers,
> Ahmad
>
> --
> Pengutronix e.K.                           |                             |
> Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
> 31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
> Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

Re: [PATCH 4/6] arm64: dts: imx8mm-beacon: Enable Digitial Microphone

[Adam Ford]

On Mon, Jul 18, 2022 at 12:37 AM Sascha Hauer <s.hauer@pengutronix.de> wrote:
>
> Hi Adam,
>
> On Sun, Jul 17, 2022 at 01:09:58PM -0500, Adam Ford wrote:
> > There is a PDM microphone port on the baseboard which is connected to the
> > micfil controller.  Create a new sound card to support this interface.
> >
> > Signed-off-by: Adam Ford <aford173@gmail.com>
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
> > index 03266bd90a06..16444954f873 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
> > @@ -98,7 +98,7 @@ reg_usdhc2_vmmc: regulator-usdhc2 {
> >               enable-active-high;
> >       };
> >
> > -     sound {
> > +     sound-codec {
> >               compatible = "fsl,imx-audio-wm8962";
> >               model = "wm8962-audio";
> >               audio-cpu = <&sai3>;
> > @@ -111,6 +111,18 @@ sound {
> >                       "AMIC", "MICBIAS",
> >                       "IN3R", "AMIC";
> >       };
> > +
> > +     sound-micfil {
> > +             compatible = "fsl,imx-audio-card";
> > +             model = "imx-audio-micfil";
> > +             pri-dai-link {
> > +                     link-name = "micfil hifi";
> > +                     format = "i2s";
> > +                     cpu {
> > +                             sound-dai = <&micfil>;
> > +                     };
> > +             };
> > +     };
>
> Note the micfil works well with the simple-audio-card driver which might
> be an alternative here.

Sascha,

Sorry to resurrect an old thread.

I tried using the simple-audio-card, but it doesn't present me with an
audio card.  I don't get errors, but I don't get a card either.  Can
you point me to an example where someone did this?  I added debug code
to the simple-audio-card and I migrated an existing card, and I see
the debug code for the wm8962 CODEC, but not the micfil.  The Micfil
works just fine with the imx-audio-card, but I don't mind using the
simple-audio-card if it makes more sense.

adam
>
> Sascha
>
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