[Intel-gfx] [regression] drm/i915: Flush pending writes on i830/i845 after updating GTT

[Chris Wilson]

On Thu, 30 Dec 2010 10:36:35 +0100, Alexey Fisher <bug-track at fisher-privat.net> wrote:
> Hi,
> after this patch i get some rendering issues on my Intel DG45ID board,
> (Vendor: 0x8086, Device: 0x2e22, Revision: 0x03 (A3))

I need a few more details on the nature of the rendering issue and
driver versions.

The idea is to skip the flush in case we have nothing to flush (this is
required to avoid the too-early-flush during initialisation of the ring
buffer). Finding the circumstances of the flush that causes the issue
should help determine the root cause of the bug.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre