On Mon, Oct 12, 2020 at 3:56 PM Heinrich Schuchardt xypron.glpk@gmx.de wrote:
Hello Matthias,
I have upgraded the Raspberry 3 firmware from raspi3-firmware (1.20190215-1+deb10u4) to raspi-firmware (1.20200601-3) [https://packages.debian.org/bullseye/raspi-firmware].
After the upgrade the output of U-Boot on the serial console is complete gibberish as if the baudrate were incorrect. The output from the Linux kernel is fine at 115200 baud.
I've seen similar on all firmware since around mid April up until recently, it seems to be fixed with releases in Oct (I'm using one from Oct 8th), I'm not sure if it can be fixed in U-Boot but it seems to be due to a change in the firmware.
I observe this both with rpi_3_defconfig and rpi_arm64_defconfig, v2020.10 and current origin/master.
config.txt:
arm_control=0x200 enable_uart=1 upstream_kernel=1 kernel=u-boot.bin
boot.scr: setenv autoload no dhcp load mmc 0:1 $fdt_addr_r bcm2710-rpi-3-b-plus.dtb load mmc 0:2 $kernel_addr_r EFI/debian/grubaa64.efi bootefi $kernel_addr_r $fdt_addr_r
Best regards
Heinrich