From b1b6c1c4d3c63d8097c933009bdb618d1be18305 Mon Sep 17 00:00:00 2001 From: Shengjiu Wang Date: Thu, 25 Jun 2026 13:47:09 +0800 Subject: [PATCH] arm64: dts: imx8mp-ab2: Enable MU2 for DSP communication Enable the MU2 (Message Unit 2) node on the i.MX8MP Audio Board v2. MU2 is required for inter-processor communication between the application CPU and the HiFi4 DSP, allowing DSP firmware to exchange control and status messages with the Linux host. Without this change, the DSP driver cannot establish the message channel and DSP audio processing is non-functional. Fixes: bf68c18150efc ("arm64: dts: imx8mp-ab2: add support for NXP i.MX8MP audio board (version 2)") Signed-off-by: Shengjiu Wang Reviewed-by: Daniel Baluta Signed-off-by: Frank Li --- arch/arm64/boot/dts/freescale/imx8mp-ab2.dts | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mp-ab2.dts b/arch/arm64/boot/dts/freescale/imx8mp-ab2.dts index 443e4fd5b9bf..285bf79864eb 100644 --- a/arch/arm64/boot/dts/freescale/imx8mp-ab2.dts +++ b/arch/arm64/boot/dts/freescale/imx8mp-ab2.dts @@ -775,6 +775,10 @@ &micfil { status = "okay"; }; +&mu2 { + status = "okay"; +}; + &pwm1 { pinctrl-0 = <&pinctrl_pwm1>; pinctrl-names = "default";