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

[O'Rourke, Tom]

>From: Ben Widawsky [mailto:ben at bwidawsk.net]
>Sent: Friday, June 20, 2014 9:43 AM
>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>
>
>
>Now that CHV is out, does it apply there too?
>Reviewed-by: Ben Widawsky <ben at bwidawsk.net>
>
>[snip]
>
>
>--
>Ben Widawsky, Intel Open Source Technology Center
[TOR:] For CHV, we expect timeout mode will provide benefit on some
pre-production steppings and no benefit on the production stepping.