drm/i915/skl: Prevent unclaimed register writes on skylake.

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I'm getting unclaimed register writes when checking the WM registers
after the crtc is disabled. So I would imagine those are guarded by
the crtc power well. Fix this by not reading out wm state when the
power well is off.

Cc: stable@vger.kernel.org # v4.3
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92181
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

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Maarten Lankhorst 2015-10-22 13:56:34 +02:00 • committed by Jani Nikula

parent 6675bce251

commit b10f1b2017

1 changed files with 5 additions and 0 deletions

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drivers/gpu/drm/i915/intel_pm.c

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