[Mesa-dev] [PATCH 2/2] st/mesa: Invalidate external textures when (re-)binding

[Marek Olšák]

On Wed, May 25, 2016 at 3:34 PM, Philipp Zabel <p.zabel at pengutronix.de> wrote:
> Am Mittwoch, den 25.05.2016, 09:23 -0400 schrieb Ilia Mirkin:
>> Iirc invalidate_resource is to allow backend to discard the contents...
>
> Thanks, I didn't know that. So this would need a new callback then?
> Specifically I want to discard a copy in tiled layout that was derived
> from a linear external texture previously.

FWIW, radeon drivers don't change the tile mode after a texture has
been exported. When the texture is exported, the tile mode is set in
stone, be it linear or tiled. There is no second copy.

Marek