Hi Adam,
On Sat, May 20, 2023 at 5:13 AM Adam Ford <aford173@xxxxxxxxx> wrote:
> 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>;
LGTM...
> 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
That means genpd_add_device() failed (but why?)...
> [ 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
... hence the relationship does not show up.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
