On Thu, Feb 9, 2023 at 5:20 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@xxxxxxxxxxxxx> wrote:
>
> Il 09/02/23 09:49, Chen-Yu Tsai ha scritto:
> > On Wed, Feb 8, 2023 at 6:37 PM AngeloGioacchino Del Regno
> > <angelogioacchino.delregno@xxxxxxxxxxxxx> wrote:
> >>
> >> Get GPU support on MT8186 by adding its compatible.
> >
> > I'd skip MT8186 for now. We have to work out some binning details for the
> > OPP, in particular how to deal with both Panfrost (or Mali) and SVS adding
> > the OPP table. We were just looking at the Mali driver today.
> >
>
> Dealing with binning is fairly easy... I have something already done for
> that one, but I'm not sure that it would be the best option.
> My solution makes use of opp-supported-hw by "standard means", but perhaps
> let's have a separated conversation about it?
>
> I don't think that skipping this would give any benefit though, because
> that is only adding a compatible and whatever binning support would have
> to be generic and 99% not bound to any mediatek specific compatible.
The binning is related to voltage range, not maximum OPP. So it's more
like fast/slow example in Documentation/devicetree/bindings/opp/opp-v2.yaml
or the opp/allwinner,sun50i-h6-operating-points.yaml, minus the efuse node.
The downstream DT currently looks like this:
opp-950000000 {
opp-hz = /bits/ 64 <950000000>;
/* This is Mali specific; ignore
opp-hz-real = /bits/ 64 <950000000>,
/bits/ 64 <950000000>;
*/
opp-microvolt = <900000>, <1000000>;
opp-microvolt-bin4 = <875000>, <975000>;
opp-microvolt-bin5 = <850000>, <950000>;
};
ChenYu
