Hi all,
I am using FVP base RevC. Recently I heard that this FVP supports a
Mali G76 GPU, and I want to test it.
Can you be more specific? Are you guessing or do you know for sure it is in the
public release of FVP models.
To configure it, initially I add a node in
linux/arch/arm64/boot/dts/arm/fvp-base-aemv8a-aemv8a.dtsi, but it
doesn't work. Finally, I find that I should configure
trusted-firmware-a/fdts/fvp-base-gicv3-psci-1t.dts, and I can see a
mali GPU node in /proc/device-tree.
OK so there is already a DT with the required node and it works ?
One of my booting command (sorry, the entire booting command is TOO
long) is "--data
cluster0.cpu0=arm-reference-platform/output/fvp/fvp-oe/uboot/fvp-base-aemv8a-aemv8a.dtb@0x82000000".
And I use the following shell command to compile the TF-A: make
PLAT=fvp all CROSS_COMPILE=aarch64-none-elf- ENABLE_RME=1 DEBUG=1
ARCH=aarch64 fip
BL33=arm-reference-platform/output/fvp/components/fvp/uboot.bin
FVP_HW_CONFIG_DTS=fdts/fvp-base-gicv3-psci-1t.dts
ARM_DISABLE_TRUSTED_WDOG=1.
I don't understand all these details, but from Linux perspective I would like to know if
this is the default release image and what is the behaviour with released TF-A images as
that matters a lot.
So, I wonder, why the real DTS is in TF-A, instead of Linux?
Please submit the patch if you prefer to see this in the Linux tree. We need to keep it
disabled by default if keeping it enabled causes any boot/runtime regression.
BTW, I wanna ask another question (although it is not proper to ask
here, I cannot find FVP's mailing list): Can someone provide a proper
dts configurations for FVP's Mali G76 GPU?
I am no expert either. But I would just follow DT bindings upstream and add if anything
is missing including the compatibles if any before adding to any upstream DTS.
--
Regards,
Sudeep