Hi all,
I am trying to see if the Open Source PowerVR driver [1] for the 6250
can be made to work on the RZ/G2M, and I am having difficulty getting
the power domain to turn on.
In the GPU node, I set:
power-domains = <&sysc R8A774A1_PD_3DG_B>;
Unfortunately, when it boots, I get the following error message:
[ 8.313305] powervr fd000000.gpu: error -ENOENT: failed to add to
PM domain 3dg-b
[ 8.320822] powervr: probe of fd000000.gpu failed with error -2
Is there something I need to do in order to use this? it appears the
3DG_B starts 3DG_A if I understand this correctly.
Unfortunately, I don't see the parent child relationship between the
3DG_B and the GPU
root@beacon-rzg2m:~# cat /sys/kernel/debug/pm_genpd/pm_genpd_summary
domain status children
performance
/device runtime status
----------------------------------------------------------------------------------------------
clock-controller on
0
3dg-b off-0
0
3dg-a off-0
0
3dg-b
If anyone has any suggestions, I'd like to try to get this
operational. I would also expect this to be similar for the
corresponding RCAR-GEN3 SoC as well. It appears that Mesa has
mainline support for PowerVR 6250 as well and it looks like the Mesa
side looks like it's been merged about a year ago. [2]
adam
[1] - https://gitlab.freedesktop.org/frankbinns/powervr
[2] - https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15243
