Re: [PATCH v3 5/5] arm64: dts: allwinner: a64: Run GPU at 432 MHz

[Erico Nunes]

On Mon, Mar 4, 2024 at 6:01 PM Frank Oltmanns <frank@xxxxxxxxxxxx> wrote:
>
> The Allwinner A64's GPU has currently three operating points. However,
> the BSP runs the GPU fixed at 432 MHz. In addition, at least one of the
> devices using that SoC - the pinephone - shows unstabilities (see link)
> that can be circumvented by running the GPU at a fixed rate.
>
> Therefore, remove the other two operating points from the GPU OPP table,
> so that the GPU runs at a fixed rate of 432 MHz.

In addition to all of this, the A64 user manual does say explicitly
that "dynamic frequency scaling is not supported" on PLL_GPU. So I
think this is really needed for a reliable GPU experience on A64.

Acked-by: Erico Nunes <nunes.erico@xxxxxxxxx>

Thanks

Erico