drm/i915: vlv: cache current CD clock rate

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Instead of reading out the CD clock rate from the HW at each modeset, do
this only during driver init and resume and use the cached value during
modeset. This moves things towards a state where the sw and hw side
setup is separated. It's also needed for VLV RPM, where we don't put
device into D0 state until modeset_global_resources is called and thus
can't access any display/gfx registers.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Antti Koskipää <antti.koskipaa@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Imre Deak 2014-03-27 17:45:10 +02:00 • committed by Daniel Vetter

parent 0d8f94912a

commit d60c4473b6

4 changed files with 13 additions and 9 deletions

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1

drivers/gpu/drm/i915/i915_drv.h

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16

drivers/gpu/drm/i915/intel_display.c

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1

drivers/gpu/drm/i915/intel_drv.h

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4

drivers/gpu/drm/i915/intel_pm.c

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