Re: [PATCH v2 2/6] media: verisilicon: Don't hold the VPU in reset after remove

[Philipp Zabel]

On Do, 2026-11-12 at 23:54 -0800, Arun Iyengar wrote:
> > Le 12/11/2026 à 11:19, Philipp Zabel a écrit :
> > > If vsi-iommu accesses require these bus interface resets to be
> > > deasserted at certain points, why doesn't it request its own reset
> > > controls?
> > > 
> > > Depending on implicit assumptions like another driver not asserting its
> > > exclusively controlled resets seems fragile.
> 
> The AV1 node lists these resets for hantro only.
> vsi-iommu would need them in its own node and binding,

Would that more correctly describe the hardware though?

> and both drivers would have to move to shared reset controls.

Worse, shared reset controls don't work if one party temporarily needs
full control, for example to issue a reset pulse after timeout.
So this likely would require exclusive reset controls with
acquire/release.

regards
Philipp