| Message ID | 20220717181000.1186373-2-aford173@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/6] arm64: dts: imx8mn-beacon: Enable Digitial Microphone | expand |
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
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 |
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
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>