[Intel-gfx] [RFC] drm/i915: Check if we hold a wakeref during ioread32/iowrite32

[Imre Deak]

On ti, 2016-02-23 at 14:55 +0000, Chris Wilson wrote:
> On Tue, Feb 23, 2016 at 04:47:17PM +0200, Imre Deak wrote:
> > The device needs to be in D0 state whenever we call these
> > functions, so
> > add the corresponding assert checks.
> 
> No. In quite a few of those cases we are calling iowrite to non-
> device
> memory, even normal pages.

Hm right didn't think about that. I guess the only case we care about
then are accesses through the GTT.

> How's the separation of struct_mutex from rpm going so that we can
> forgo
> adding assertions and use explicit power management instead?

It's planned to be done, but no one is working on that yet. This is
something we could still have regardless, similarly to other helpers
accessing the device.

> -Chris
>