Subject: Re: [PATCH v4 1/7] dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183

From: Steven Price <[email-masked]>
Date: Fri, 6 Mar 2020 14:43:36 +0000

On Fri, Mar 06, 2020 at 02:13:08PM +0000, Rob Herring wrote:
> On Thu, Mar 5, 2020 at 8:34 PM Nick Fan <[email-masked]> 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.
> 
> Can you clarify what's in each domain? Are there actually 3 shader
> cores (IIRC, that should be discoverable)?

The cover letter from Nicolas includes:

> [  501.321752] panfrost 13040000.gpu: shader_present=0x7 l2_present=0x1

0x7 is three bits set, so it certainly looks like there are 3 shader
cores. Of course I wouldn't guarantee that it is as simple as each power
domain has a shader core in. The job manager and tiler also need to be
powered somehow, so they are either sharing with a shader core or
there's something more complex going on.

Steve

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