Re: [PATCH 04/21] dt-bindings: gpu: img: Allow dma-coherent

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On Wed, Nov 06, 2024 at 10:18:06AM +0000, Matt Coster wrote:
> On 05/11/2024 18:06, Conor Dooley wrote:
> > On Tue, Nov 05, 2024 at 03:58:10PM +0000, Matt Coster wrote:
> >> This attribute will be required for the BXS-4-64 MC1 and will be enabled in
> >> the DTS for the TI k3-j721s2 in a subsequent patch; add it now so
> >> dtbs_check doesn't complain later.
> > 
> > Sounds like the property should be made required for that integration.
> 
> This is something I went back and forth on. Where is the line drawn
> between things that should be enforced in bindings and things that only
> ever need to be specified once, so should just be left to the dt itself
> to be the source of truth?
> 
> Having said that, I realise TI could spin a new SoC with a new dt but
> use the same compatible string for the GPU;

No they can't. New SoC, new compatible.

> the "single" source of truth
> then wouldn't be so single anymore. I guess by making this property
> required for this compatible string, we're saying any use of it must
> behave in exactly the same way, right?

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