drm/i915: Cache HPLL frequency on VLV/CHV

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We need the HPLL frequency when calculating cdclk. Currently we read
that out from the hardware every single time, which isn't going to fly
very well if the device is runtime suspended. So cache the HPLL
frequency in dev_priv and use the cached value.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reference: https://bugs.freedesktop.org/show_bug.cgi?id=82939
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Ville Syrjälä 2014-10-07 17:41:22 +03:00 • committed by Daniel Vetter

parent 9500986159

commit 6bcda4f0df

2 changed files with 8 additions and 7 deletions

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1

drivers/gpu/drm/i915/i915_drv.h

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14

drivers/gpu/drm/i915/intel_display.c

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