[Mesa-dev] [PATCH v3 1/7] radeonsi: Allocate buffers for DCC.

Axel Davy axel.davy at ens.fr
Wed Oct 21 00:56:52 PDT 2015

On 21/10/2015 00:10, Bas Nieuwenhuizen wrote:
> DCC is disabled for textures that can be shared as sharing the
> DCC buffers has not been implemented yet.
> +   surf->dcc_enabled =  !(surf->flags & RADEON_SURF_Z_OR_SBUFFER) &&
> +                        !(surf->flags & RADEON_SURF_SCANOUT) &&
> +                        !compressed && AddrDccIn.numSamples <= 1;
> +
Testing if a surface is scanout is not enough to avoid shared surfaces.

In practice, it may be true currently mesa, and glamor via gbm, would 
use the scanout flag for shared
buffers. It seems however a bit weak to rely on that.

I suggest rather to use the pipe shared bind flag.

  I noticed in some case of imported surfaces the bind flag is not 
advertised, I'm going to send a patch to fix that.


Axel Davy

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