Re: [PATCH 3/3] drm/i915: Use intel_plane_obj_offset from more places

From: Chris Wilson <chris@chris-wilson.co.uk>
To: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
	Daniel Vetter <daniel@ffwll.ch>,
	Intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH 3/3] drm/i915: Use intel_plane_obj_offset from more places
Date: Tue, 16 Jun 2015 12:06:23 +0100	[thread overview]
Message-ID: <20150616110623.GQ28462@nuc-i3427.alporthouse.com> (raw)
In-Reply-To: <20150616110200.GP28462@nuc-i3427.alporthouse.com>

On Tue, Jun 16, 2015 at 12:02:00PM +0100, Chris Wilson wrote:
> fbdev is a little special. All that we actually require is a plain
> ggtt_pin to ensure that the fb is still around for panics. We can leave
> the plane state in modesetting. We have have full control over the
> struct we associated with the ifbdev, so can easily stash the vma in
> there as well.

Or even from the atomic perspective, the plane state for fbdev can be
kept alive for emergency restoration. We still need to keep the ggtt_pin
for the persistent mmaping we use for fbcon.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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