arm64: dts: imx8mm-beacon-som: Fix Choppy BT audio

When streaming bluetooth audio, the sound is choppy due to the
fact that the default baud rate of the HCI interface is too slow
to handle 16-bit stereo at 48KHz.

The Bluetooth chip is capable of up to 4M baud on the serial port,
so this patch sets the max-speed to 4000000 in order to properly
stream audio over the Bluetooth.

Fixes: 593816fa2f35 ("arm64: dts: imx: Add Beacon i.MX8m-Mini development kit")
Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
index 55b36bddd513218b4fb193a18a2c28b5a9b3a8be..b88c3c99b007eaf6011ea2656a194ce338c3928d 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
@@ -211,6 +211,7 @@
                host-wakeup-gpios = <&gpio2 8 GPIO_ACTIVE_HIGH>;
                device-wakeup-gpios = <&gpio2 7 GPIO_ACTIVE_HIGH>;
                clocks = <&osc_32k>;
+               max-speed = <4000000>;
                clock-names = "extclk";
        };
 };