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SubjectRe: [PATCH v4 1/7] dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183
On Fri, Mar 6, 2020 at 10:34 AM Nick Fan <nick.fan@mediatek.com> wrote:
>
> Sorry for my late reply.
> I have checked internally.
> The MT8183_POWER_DOMAIN_MFG_2D is just a legacy name, not really 2D
> domain.
>
> If the naming too confusing, we can change this name to
> MT8183_POWER_DOMAIN_MFG_CORE2 for consistency.

Thanks! I think I'll keep MT8183_POWER_DOMAIN_MFG_2D (that's fine if
that's the domain name you use internally in your HW design), but I'll
modify power-domain-names to core0/1/2 in the binding.

> Thanks
>
> Nick Fan
>
> On Wed, 2020-02-26 at 08:55 +0800, Nicolas Boichat wrote:
>
> > +Nick Fan +Sj Huang @ MTK
> >
> > On Wed, Feb 26, 2020 at 1:16 AM Rob Herring <robh@kernel.org> 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@chromium.org>
> > > > Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
> > > > ---
> > > >
> > > > 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
>

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