Re: exynos-mixer 14450000.mixer: [drm:exynos_drm_register_dma] *ERROR* Device 14450000.mixer lacks support for IOMMU

[Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>]

On 01.11.2023 03:50, Chuck Zmudzinski wrote:

> On 10/31/2023 7:45 PM, Stefano Stabellini wrote:
> > Unfortunately there is no easy solution.
> >
> > Do you know the version of the SMMU available on the platform? 
> >       
> I am trying to discern, but I doubt we have v3 because we are
> working on a very old chromebook from 2012, and I am finding
> patches for smmv3 in Linux not starting until 2015. It is good to
> know about this option, though, for future work we might do on newer
> devices.
>

Just to clarify. Exynos SMMU is a custom hardware designed by Samsung, it is not based on ARM's SMMU. Linux has a separate driver for it.

> ...

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland