[Intel-gfx] [PATCH 6/6] drm/i915: Attach a fb to the load-detect pipe

[Chris Wilson]

On Wed, 20 Apr 2011 11:43:38 -0700, Keith Packard <keithp at keithp.com> wrote:
> On Wed, 20 Apr 2011 10:22:22 +0100, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> 
> > For bonus amusement value, we perform the first load detect before even
> > establishing our fbdev.
> 
> It seems like we need to be able to perform load detection in this
> case to create a suitable frame buffer at boot time.

Aye, a classic chicken and egg problem. I wanted to ignore it as
everything would have been resized upon the first probe by userspace
(hotplug polling being disabled for load-detect paths), but only after the
probe completes so there is the issue that the fb may be too small and so
we don't prevent all potential PGTBL_ER.  And VGA is laso likely to be a
boot device.

I'll spin up a patch for a temporary buffer and see what you think.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre