d6d0f73a2e
Without this patch, the devicetree used by linux at runtime is
the u_boot devicetree.
While using rusticl on the khadas vim3 board with the default
extlinux.conf, mesa's panfrost driver return "gpu shed timeout"
errors. Adding "devicetree /meson-g12b-khadas-vim3.dtb" to the
extlinux.conf file solve the problem. Linux successfully boot
with and without the change but without this patch the devicetree
used by linux at runtime is the u-boot devicetree.
The differences between the u-boot devicetree and the linux
devicetree are:
-The u-boot devicetree contains two more nodes than the linux devicetree. Those nodes are:
- smbios : compatible option is set to "u-boot,sysinfo-smbios".
- __symbols__ : present if -@ or --symbols is used during the devicetree compilation.
-Most of u-boot devicetree nodes have a "phandle" property.
-SoC and vpu have a "u-boot,dm-pre-reloc;" property.
-Some aliases are different.
-The u-boot operating points tables contains more nodes.
The size difference between the u-boot devicetree and the linux
devicetree is approximately 3.5kB.
During runtime, the linux devicetree have the "phandle" and
"u-boot,dm-pre-reloc;" properties and the smbios node. So,
The runtime devicetree is the one from u-boot.
Signed-off-by: Antoine Coutant <antoine.coutant@smile.fr>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
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|---|---|---|
| .. | ||
| extlinux.conf | ||
| genimage.cfg | ||
| post-build.sh | ||
| post-image.sh | ||
| readme.txt | ||
Khadas VIM3 Description =========== This configuration builds a complete image for the Khadas VIM3 to be flashed on an SD-card. How to build it =============== Select the default configuration for the target: $ make khadas_vim3_defconfig Optional: modify the configuration: $ make menuconfig Build: $ make Result of the build =================== output/images/ +-- amlogic-boot-fip + +-- build-fip.sh + +-- g12a.inc + `-- khadas-vim3 + +-- acs.bin + +-- acs_tool.py + +-- aml_ddr.fw + +-- aml_encrypt_g12b + +-- bl2.bin + +-- bl301.bin + +-- bl30.bin + +-- bl31.bin + +-- bl31.img + +-- blx_fix.sh + +-- ddr3_1d.fw + +-- ddr4_1d.fw + +-- ddr4_2d.fw + +-- diag_lpddr4.fw + +-- lpddr3_1d.fw + +-- lpddr4_1d.fw + +-- lpddr4_2d.fw + +-- Makefile + `-- piei.fw +-- boot.vfat +-- extlinux + `-- extlinux.conf +-- fip + +-- u-boot.bin + +-- u-boot.bin.sd.bin + +-- u-boot.bin.usb.bl2 + `-- u-boot.bin.usb.tpl +-- Image +-- meson-g12b-a311d-khadas-vim3.dtb +-- rootfs.ext2 +-- rootfs.ext4 -> rootfs.ext2 +-- rootfs.tar +-- sdcard.img `-- u-boot.bin The post-image script uses the files in the amlogic-boot-fip folder to sign the bootloader image before integrating it into the sdcard image. To copy the image file to the sdcard use dd: $ dd if=output/images/sdcard.img of=/dev/sdX Tested hardware =============== Khadas vim3 (rev. 14)