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

[ Upstream commit 587258edd94c305077923ec458e04c032fca83e6 ]

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>
Signed-off-by: Sasha Levin <sashal@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 94911b1707ef238b5f89253e9c52077bce6e7845..09d757b3e3ce66d3a6595adc21c49c9f680d21f5 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
@@ -210,6 +210,7 @@
                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";
        };
 };