Re: [PATCH 02/15] drm/i915: Embedded microcontroller (uC) firmware loading support

Chris Wilson
2015-06-18T15:27:57Z

On Thu, Jun 18, 2015 at 04:49:49PM +0200, Daniel Vetter wrote:
> Guc is different since we really must have it ready for execbuf, and for
> that usecase a completion at drm_open time sounds like the right thing.

But do we? It would be nice if we had a definite answer that the hw was
ready before we started using it in anger, but I don't see any reason
why we would have to delay userspace for a slow microcode update...

(This presupposes that userspace batches are unaffected by GuC/execlist
setup, which for userspace sanity I hope they are - or at least using
predicate registers and conditional execution.)
-Chris

--
Chris Wilson, Intel Open Source Technology Centre