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

[Ben Widawsky]

On Wed, Apr 30, 2014 at 01:34:36PM -0700, Kristen Carlson Accardi wrote:
> 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?

I'm not actually sure. You can try it and let me know. I haven't had any
time to verify the rebase. We can check my hack.

-- 
Ben Widawsky, Intel Open Source Technology Center