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>
6 lines
158 B
Plaintext
6 lines
158 B
Plaintext
default buildroot
|
|
label buildroot
|
|
kernel /Image
|
|
devicetree /meson-g12b-a311d-khadas-vim3.dtb
|
|
append root=/dev/mmcblk0p2 rootwait console=ttyAML0,115200
|