[Intel-gfx] [PATCH 2/2] drm/i915: Use RCS flips on Ivybridge+

[Chris Wilson]

On Mon, Aug 26, 2013 at 01:43:25PM -0700, Stéphane Marchesin wrote:
>    On Mon, Aug 26, 2013 at 1:42 PM, St�phane Marchesin
>    <[1]stephane.marchesin at gmail.com> wrote:
> 
>      On Mon, Aug 26, 2013 at 12:58 PM, Chris Wilson
>      <[2]chris at chris-wilson.co.uk> wrote:
> 
>        RCS flips do work on Iybridge+ so long as we can unmask the messages
>        through DERRMR. However, there are quite a few workarounds mentioned
>        regarding unmasking more than one event or triggering more than one
>        message through DERRMR. Those workarounds in principle prevent us from
>        performing pipelined flips (and asynchronous flips across multiple
>        planes) and equally apply to the "known good" BCS ring. Given that it
>        already appears to work, and also appears to work with unmasking all 3
>        planes at once (and queuing flips across multiple planes), be brave.
> 
>        Bugzlla: [3]https://bugs.freedesktop.org/show_bug.cgi?id=67600
>        Signed-off-by: Chris Wilson <[4]chris at chris-wilson.co.uk>
>        Lightly-tested-by: Stephane Marchesin <[5]marchesin at icps.u-strasbg.fr>
> 
>      You can go ahead and say Tested-by, I ran my usual tests for 3 hours and
>      it didn't crash/show an issue. It would crash in ~10-30 minutes with the
>      other patches.
> 
>    Oh actually this one is a bit different... Give me 3 hours :)
>    St�phane

I should have mentionted this was v2, and your testing was for v1. Hopefully,
I've moved the code around correctly.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre