在 Rpi4-8gb 中, 当我尝试在 Debian-12 64 位中更改 bcm2711-rpi-4- b.dtb 时
原标题：issue in Rpi4-8gb When I try change bcm2711-rpi-4-b.dtb in Debian-12 64 bits
This bounty has ended. Answers to this question are eligible for a +50 reputation bounty. Bounty grace period ends in 22 hours. neuberfran is looking for a more detailed answer to this question:
I need anyone tô solve my issue. If the person has an rpi4 with an SD card available. Otherwise (and in addition) it can be using an overlay (dtbo) file but with U-boot this is much more difficult
neuberfran@raspberrypi:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 12 (bookworm)
Release: 12
Codename: bookworm
neuberfran@raspberrypi:~$ arch
aarch64
neuberfran@raspberrypi:~$ uname -a
Linux raspberrypi 6.6.20+rpt-rpi-v8 #1 SMP PREEMPT Debian 1:6.6.20-1+rpt1 (2024-03-07) aarch64 GNU/Linux
neuberfran@raspberrypi:~$ uname -m
aarch64
U-Boot> printenv bootcmd
bootcmd=fatload mmc 0 ${kernel_addr_r} kernel8.img;fatload mmc 0 ${fdt_addr} ${fdtfile}; booti ${kernel_addr_r} - ${fdt_addr}
I have rpi4 with debian 12 (as above) and I m trying to change bcm2711-rpi-4-b.dtb, starting with the commands below:
mkdir rasp_arm64
cd rasp_arm64/
git clone --depth=1 https://github.com/raspberrypi/linux
sudo apt-get install qemu-system-arm
sudo apt-get install lzop
sudo apt-get install gcc-aarch64-linux-gnu
cd linux/
make -j8 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- mrproper
make -j8 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bcm2711_defconfig
make -j8 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- Image modules dtbs
make -j8 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- dtbs
ls -lha arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b.dtb
-rw-rw-r-- 1 neuuberfran neuuberfran 55K Jul 12 13:02 arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b.dtb
config.txt (file)
enable_uart=1
kernel=u-boot.bin
arm_64bit=1
git branch
master
* my6.6.20
Issue I m having, right in U-boot, described below:
2024.04-rc4-0004
0-gbd0aedde3e-dirty (Mar 23 2024 - 10:37:01 -0300)
DRAM: 948 MiB (effective 7.9 GiB)
RPI 4 Model B (0xd03115)
Core: 210 devices, 15 uclasses, devicetree: board
MMC: mmcnr@7e300000: 1, mmc@7e340000: 0
Loading Environment from FAT... OK
In: serial,usbkbd
Out: serial,vidconsole
Err: serial,vidconsole
Net: eth0: ethernet@7d580000
starting USB...
No working controllers found
Hit any key to stop autoboot: 0
9259827 bytes read in 413 ms (21.4 MiB/s)
Failed to load broadcom/bcm2711-rpi-4-b.dtb
Uncompressing Kernel Image to 0
Moving Image from 0x80000 to 0x200000, end=1b60000
ERROR: Did not find a cmdline Flattened Device Tree
Could not find a valid device tree
Note.: https://forums.raspberrypi.com/viewtopic.php?t=314845 Similar issue, but in CM4 module
Can anyone help-me?
问题回答
First of all, to resolve my issue I recreated an image (with SSH, Wifi, etc) for my rpi4 8gb, using Imager App (version 1.8.5) on Ubuntu 20.04:
https://hechao.li/2021/12/20/Boot-Raspberry-Pi-4-Using-uboot-and-Initramfs/
Then, based on the website above, I created U-boot 2024.04 and boot.scr (specifically) as below:
cat << EOF > boot_cmd.txt fatload mmc 0:1 ${kernel_addr_r} Image setenv bootargs "8250.nr_uarts=1 console=ttyS0,115200 root=/dev/mmcblk0p2 rootwait rw" booti ${kernel_addr_r} - ${fdt_addr} EOF
~/u-boot/tools/mkimage -A arm64 -O linux -T script -C none -d boot_cmd.txt boot.scr
config.txt (I don`t need more cmdline.txt, I delete it)
1.enable_uart=1 2.arm_64bit=1 3.kernel=u-boot.bin 4.#dtoverlay=disable-bt
I put files: config.txt, bcm2711-rpi-4-b.dtb (already with the necessary changes for RPMsg), Image, boot.scr and u-boot.bin in bootfs partition.
I insert sdcard in rpi4 8gb and access it using sudo picocom -b 115200 /dev/ttyUSB0:
