+Nick Fan +Sj Huang @ MTK
On Wed, Feb 26, 2020 at 1:16 AM Rob Herring <robh@xxxxxxxxxx> wrote:
>
> On Fri, Feb 07, 2020 at 01:26:21PM +0800, Nicolas Boichat wrote:
> > Define a compatible string for the Mali Bifrost GPU found in
> > Mediatek's MT8183 SoCs.
> >
> > Signed-off-by: Nicolas Boichat <drinkcat@xxxxxxxxxxxx>
> > Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@xxxxxxxxxxxxx>
> > ---
> >
> > v4:
> > - Add power-domain-names description
> > (kept Alyssa's reviewed-by as the change is minor)
> > v3:
> > - No change
> >
> > .../bindings/gpu/arm,mali-bifrost.yaml | 25 +++++++++++++++++++
> > 1 file changed, 25 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> > index 4ea6a8789699709..0d93b3981445977 100644
> > --- a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> > +++ b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> > @@ -17,6 +17,7 @@ properties:
> > items:
> > - enum:
> > - amlogic,meson-g12a-mali
> > + - mediatek,mt8183-mali
> > - realtek,rtd1619-mali
> > - rockchip,px30-mali
> > - const: arm,mali-bifrost # Mali Bifrost GPU model/revision is fully discoverable
> > @@ -62,6 +63,30 @@ allOf:
> > minItems: 2
> > required:
> > - resets
> > + - if:
> > + properties:
> > + compatible:
> > + contains:
> > + const: mediatek,mt8183-mali
> > + then:
> > + properties:
> > + sram-supply: true
> > + power-domains:
> > + description:
> > + List of phandle and PM domain specifier as documented in
> > + Documentation/devicetree/bindings/power/power_domain.txt
> > + minItems: 3
> > + maxItems: 3
> > + power-domain-names:
> > + items:
> > + - const: core0
> > + - const: core1
> > + - const: 2d
>
> AFAIK, there's no '2d' block in bifrost GPUs. A power domain for each
> core group is correct though.
Good question... Hopefully Nick/SJ@MTK can comment, the non-upstream DTS has:
gpu: mali@13040000 {
compatible = "mediatek,mt8183-mali", "arm,mali-bifrost";
power-domains = <&scpsys MT8183_POWER_DOMAIN_MFG_CORE0>;
...
}
gpu_core1: mali_gpu_core1 {
compatible = "mediatek,gpu_core1";
power-domains = <&scpsys MT8183_POWER_DOMAIN_MFG_CORE1>;
};
gpu_core2: mali_gpu_core2 {
compatible = "mediatek,gpu_core2";
power-domains = <&scpsys MT8183_POWER_DOMAIN_MFG_2D>;
};
So I picked core0/core1/2d as names, but looking at this, it's likely
core2 is more appropriate (and MT8183_POWER_DOMAIN_MFG_2D might just
be a internal/legacy name, if there is no real 2d domain).
Thanks.
> Rob
