u-boot overrides stdout-path so that it points to /chosen/framebuffer with some condition. > arm: apple: Point stdout-path to framebuffer when keyboard present > > Unless you have a spare Apple Silicon machine, getting access to > the serial port on Apple Silicon machines requires special > hardware. Given that most machines come with a built-in screen > the framebuffer is likely to be the most convenient output device > for most users. While U-Boot will output to both serial and > framebuffer, OSes might not. Therefore set stdout-path to point > at /chosen/framebuffer when a keyboard is connected to the machine. https://github.com/AsahiLinux/u-boot/commit/a609353e82fd757b7635d18ed6a0828fff657d59 Perhaps it made sense to specify serial0 as stdout-path when the framebuffer and keyboard support was inmature, but today it is preferrable to use /chosen/framebuffer instead of serial0 for the console in the most cases as the u-boot change states. Remove stdout-path to allow the kernel to choose the appropriate console. For Linux, it will be VT, which will be eventually backed by the framebuffer, if it is enabled. Otherwise, it will fall back to the serial. Signed-off-by: Akihiko Odaki <akihiko.odaki@xxxxxxxxxx> --- arch/arm64/boot/dts/apple/t600x-j314-j316.dtsi | 2 -- arch/arm64/boot/dts/apple/t600x-j375.dtsi | 2 -- arch/arm64/boot/dts/apple/t8103-jxxx.dtsi | 2 -- arch/arm64/boot/dts/apple/t8112-jxxx.dtsi | 2 -- 4 files changed, 8 deletions(-) diff --git a/arch/arm64/boot/dts/apple/t600x-j314-j316.dtsi b/arch/arm64/boot/dts/apple/t600x-j314-j316.dtsi index 5547f5e7ac5a..14b6bf234f82 100644 --- a/arch/arm64/boot/dts/apple/t600x-j314-j316.dtsi +++ b/arch/arm64/boot/dts/apple/t600x-j314-j316.dtsi @@ -30,8 +30,6 @@ chosen { #size-cells = <2>; ranges; - stdout-path = "serial0"; - framebuffer0: framebuffer@0 { compatible = "apple,simple-framebuffer", "simple-framebuffer"; reg = <0 0 0 0>; /* To be filled by loader */ diff --git a/arch/arm64/boot/dts/apple/t600x-j375.dtsi b/arch/arm64/boot/dts/apple/t600x-j375.dtsi index 7c207b1df949..22e96b436bf2 100644 --- a/arch/arm64/boot/dts/apple/t600x-j375.dtsi +++ b/arch/arm64/boot/dts/apple/t600x-j375.dtsi @@ -28,8 +28,6 @@ chosen { #size-cells = <2>; ranges; - stdout-path = "serial0"; - framebuffer0: framebuffer@0 { compatible = "apple,simple-framebuffer", "simple-framebuffer"; reg = <0 0 0 0>; /* To be filled by loader */ diff --git a/arch/arm64/boot/dts/apple/t8103-jxxx.dtsi b/arch/arm64/boot/dts/apple/t8103-jxxx.dtsi index 3c5da0e5a41d..d2483f618d44 100644 --- a/arch/arm64/boot/dts/apple/t8103-jxxx.dtsi +++ b/arch/arm64/boot/dts/apple/t8103-jxxx.dtsi @@ -27,8 +27,6 @@ chosen { #size-cells = <2>; ranges; - stdout-path = "serial0"; - framebuffer0: framebuffer@0 { compatible = "apple,simple-framebuffer", "simple-framebuffer"; reg = <0 0 0 0>; /* To be filled by loader */ diff --git a/arch/arm64/boot/dts/apple/t8112-jxxx.dtsi b/arch/arm64/boot/dts/apple/t8112-jxxx.dtsi index b6b815d93c3e..af4153dcb55d 100644 --- a/arch/arm64/boot/dts/apple/t8112-jxxx.dtsi +++ b/arch/arm64/boot/dts/apple/t8112-jxxx.dtsi @@ -22,8 +22,6 @@ chosen { #size-cells = <2>; ranges; - stdout-path = "serial0"; - framebuffer0: framebuffer@0 { compatible = "apple,simple-framebuffer", "simple-framebuffer"; reg = <0 0 0 0>; /* To be filled by loader */ -- 2.38.1
