Re: [PATCH v2 1/1] drm/tyr: make SRAM supply optional like panthor

[Boris Brezillon <boris.brezillon@collabora.com>]

On Thu, 12 Feb 2026 12:21:07 +0000
Mark Brown <broonie@kernel.org> wrote:

> On Thu, Feb 12, 2026 at 03:16:44PM +0300, Onur Özkan wrote:
> > Mark Brown <broonie@kernel.org> wrote:  
> > > On Thu, Feb 12, 2026 at 01:05:38PM +0300, Onur Özkan wrote:  
> 
> > > > Panthor handles SRAM as optional and tolerates missing sram-supply.  
> 
> > > Does the RAM really work without power?  
> 
> > If the platform has no separate sram-supply (meaning that rail is
> > coupled to mali), RAM should still be powered and work fine. Panthor
> > already relies on this model by treating sram-supply as optional and
> > as far as I can see there are no RAM issues on Panthor.  
> 
> The panthor driver is buggy here and should be fixed, the driver should
> treat the supply as mandatory and let the system integration work out
> how it's actually made available.
> 
> Trying to open code this just breaks the error handling.

Maybe, but the thing is, the DT bindings have been accepted already,
and it's not something we can easily change. What we can do is make this
sram-supply mandatory for new compatibles, but we can't force it on
older/existing SoCs without breaking backward-DT compat.