[Mesa-dev] [PATCH 3/8] radeonsi: Enable DCC.

[Marek Olšák]

On Sat, Oct 10, 2015 at 4:15 PM, Bas Nieuwenhuizen
<bas at basnieuwenhuizen.nl> wrote:
> Hi Marek,
>
> The revised series is mostly done. I wanted to do more testing and to
> try to make sure that the added cache flushes I am doing now (a
> CACHE_FLUSH event before a fast clear and on switching framebuffers)
> are the minimal needed.
>
>> Also, it looks like we don't need DCC decompression at all, right? It
>> might be better to get rid of it and only use the 3D engine to access
>> DCC-encoded surfaces.
>
> I still use it for flush_resource. I could make this redundant by
> sharing the DCC buffer by appending the DCC buffer to the texture
> resource similarly to how the CMASK is appended to the resource of a
> MSAA buffer. This has the secondary benefit of not needing to
> reference as many resources for command submission.

IIRC, flush_resource is only used for shared (scanout) surfaces where
DCC is always disabled.

Marek