[Mesa-dev] [PATCH] st/nine: Disable NV path, it's broken right now.

[Ilia Mirkin]

On Fri, Aug 21, 2015 at 3:54 PM, Axel Davy <axel.davy at ens.fr> wrote:
> This patch is the result of several discussions on our irc channels.
>
> I amended the commit message to:
>
> st/nine: Always use user constant buffers
>
> We had several reports of users hitting bugs
> with the other path to upload constants,
> and switching to the user constant buffer
> path solves the bugs.
>
> User constant buffers are expected to be slower
> for Nvidia cards, so ideally this patch should be
> reverted when the path is fixed.

Just for the record:

User constant buffers will never be fast on NVIDIA hardware. They will
always be at best what you can do in the st, but often worse since you
have more info about what changed in the st that is not passed down to
the driver.

  -ilia