[Intel-gfx] [PATCH 19/21] drm/i915: Enable the use of GPU semaphores whilst page-flipping

[Daniel Vetter]

On Sat, Apr 16, 2011 at 10:17:43AM +0100, Chris Wilson wrote:
> The 2D driver unfortunately uses the BLT ring in order to perform blits,
> and will often blit between buffers in the course of a pageflip. (Though
> usually it is from the post-flipped scanout to the window frontbuffer
> for reasons known only to itself, maintaining the front buffer in case
> of 2D access one presumes.)
> 
> As such, being able to use a GPU semaphore and not stall the CPU/GPU
> whilst switching between rings for a pageflip is useful.

Hey, we could issue flips on the blt ring .... <CARRIER LOST>

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48