etnaviv: mmu issue after end of address space reached?

[Wladimir J. van der Laan]

> The current etnaviv code gets around this stop->irq->start dance by
> spacing out the command streams, which seems to be enough to get around
> the FE MMU flush failure. This may not work correctly at the end of the
> address range. I'll take a look at this.

In my case it seems not a command buffer that this is happening for, but another
bo used by the command buffer.

> Blindly implementing the Vivante way does not seem like the correct
> approach to me.

I'm not suggesting that that is a good solution! Just needed to do that to
narrow down the issue, as well as get rid of it for now.

Regards,
Wladimir