drm/i915: Enable the maxfifo PM5 mode when appropriate on CHV

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CHV has a new knob in Punit to select between some memory power savings
modes PM2 and PM5. We can allow the deeper PM5 when maxfifo mode is
enabled, so let's do so in the hopes for moar power savings.

v2: Put the thing into a separate function to avoid churn later
v3: Don't break VLV

Reviewed-by: Vijay Purushothaman <vijay.a.purushothaman@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Ville Syrjälä 2015-03-05 21:19:51 +02:00 • committed by Daniel Vetter

parent 1e69cd74af

commit cfb41411fc

2 changed files with 21 additions and 0 deletions

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3

drivers/gpu/drm/i915/i915_reg.h

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18

drivers/gpu/drm/i915/intel_pm.c

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