drm/i915: Enable fine-tuned RPS for cherryview
authorChris Wilson <chris@chris-wilson.co.uk>
Fri, 10 Feb 2017 15:03:46 +0000 (15:03 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Tue, 14 Feb 2017 22:35:35 +0000 (22:35 +0000)
commitdb4c5e0b726f021e864e887e6b49ad6ecebabf5a
treee8c287886e6b8eb6f07bcbcfd361bc4d12e2a72d
parent5a4c6f1b1b2d91c5252cedf1c7b68a894c3f117e
drm/i915: Enable fine-tuned RPS for cherryview

When the RPS tuning was applied to Baytrail, in commit 8fb55197e64d
("drm/i915: Agressive downclocking on Baytrail"), concern was given that
it might cause Cherryview excess wakeups of the common power well.
However, the static thresholds perform poorly for Kodi, and the GPU is
unable to deliver the video frames on time. Enabling the dynamic, finer
thresholds used on all other platforms (including Skylake and Broxton
that also have the same multiple powerwell concerns) allows the GPU to
pick a more appropriate frequency and not drop frames.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170210150348.22146-1-chris@chris-wilson.co.uk
Reviewed-by: Radoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com>
drivers/gpu/drm/i915/intel_pm.c