[Intel-gfx] [PATCH 2/4] drm/i915: prevent tiling changes on framebuffer backing storage

[Daniel Vetter]

On Wed, Oct 09, 2013 at 10:29:39PM +0100, Chris Wilson wrote:
> On Wed, Oct 09, 2013 at 09:23:52PM +0200, Daniel Vetter wrote:
> > Assuming that all framebuffer related metadata is invariant simplifies
> > our userspace input data checking. And current userspace always first
> > updates the tiling of an object before creating a framebuffer with it.
> 
> Userspace already changes the tiling layout whilst keeping the fb id.

How exactly does that work? You can't really change the fb pitch without
creating a new one ... That leaves switching from tiled to untiled and
back I think.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch