[Intel-gfx] [PATCH] drm/i915/bdw: Use timeout mode for RC6 on bdw

[Kristen Carlson Accardi]

On Tue, 29 Apr 2014 22:31:49 -0700
Ben Widawsky <ben at bwidawsk.net> wrote:

> On Wed, Apr 09, 2014 at 11:44:06AM -0700, Tom O'Rourke wrote:
> > Higher RC6 residency is observed using timeout mode
> > instead of EI mode.  This applies to Broadwell only.
> > The difference is particularly noticeable with video
> > playback.
> > 
> > Issue: VIZ-3778
> > Change-Id: I62bb12e21caf19651034826b45cde7f73a80938d
> > Signed-off-by: Tom O'Rourke <Tom.O'Rourke at intel.com>
> 
> I've merged this one to my bdw-rc6 branch, and therefore my broadwell
> branch. Hopefully Kristen will see some improvement.

Unfortunately, I built your bdw-rc6 branch along with the revert
I need to get my panel to work, and I get zero rc6 residency.  Do I
have to explicitly enable it?