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* [PATCH] arm64: dts: imx8mm-beacon-som: Fix Choppy BT audio
@ 2020-10-07 13:02 Adam Ford
  2020-10-30  7:57 ` Shawn Guo
  0 siblings, 1 reply; 2+ messages in thread
From: Adam Ford @ 2020-10-07 13:02 UTC (permalink / raw)
  To: linux-arm-kernel
  Cc: aford, Adam Ford, Rob Herring, Shawn Guo, Sascha Hauer,
	Pengutronix Kernel Team, Fabio Estevam, NXP Linux Team,
	devicetree, linux-kernel

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>

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
index 55b36bddd513..b88c3c99b007 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
@@ -211,6 +211,7 @@ bluetooth {
 		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";
 	};
 };
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 2+ messages in thread

* Re: [PATCH] arm64: dts: imx8mm-beacon-som: Fix Choppy BT audio
  2020-10-07 13:02 [PATCH] arm64: dts: imx8mm-beacon-som: Fix Choppy BT audio Adam Ford
@ 2020-10-30  7:57 ` Shawn Guo
  0 siblings, 0 replies; 2+ messages in thread
From: Shawn Guo @ 2020-10-30  7:57 UTC (permalink / raw)
  To: Adam Ford
  Cc: linux-arm-kernel, aford, Rob Herring, Sascha Hauer,
	Pengutronix Kernel Team, Fabio Estevam, NXP Linux Team,
	devicetree, linux-kernel

On Wed, Oct 07, 2020 at 08:02:37AM -0500, Adam Ford wrote:
> 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>

Applied, thanks.

^ permalink raw reply	[flat|nested] 2+ messages in thread

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