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This is because the sai5 node is missing the flag telling it > to set the mclk as output. > Suggest commit message: arm64: dts: imx8mm-beacon: Set SAI5 MCLK direction to output for HDMI audio The HDMI bridge chip fails to generate an audio source due to the SAI5 master clock (MCLK) direction not being set to output. This prevents proper clocking of the HDMI audio interface. Add the `fsl,sai-mclk-direction-output` property to the SAI5 node to ensure the MCLK is driven by the SoC, resolving the HDMI sound issue. Frank > Fixes: 8ad7d14d99f3 ("arm64: dts: imx8mm-beacon: Add HDMI video with sound") > Signed-off-by: Adam Ford > --- > arch/arm64/boot/dts/freescale/imx8mm-beacon-kit.dts | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-kit.dts b/arch/arm64/boot/dts/freescale/imx8mm-beacon-kit.dts > index 97ff1ddd6318..734a75198f06 100644 > --- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-kit.dts > +++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-kit.dts > @@ -124,6 +124,7 @@ &sai5 { > assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>; > assigned-clock-rates = <24576000>; > #sound-dai-cells = <0>; > + fsl,sai-mclk-direction-output; > status = "okay"; > }; > > -- > 2.48.1 >