[Bug 83520] [BDW] enable_rc6=0 doesn't work, only the BIOS RC6 switch does

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83520

--- Comment #5 from Chris Wilson <chris at chris-wilson.co.uk> ---
Perhaps something like

diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 0a4bc51cebdc..7489da3fb9fa 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13470,6 +13470,7 @@ void intel_modeset_gem_init(struct drm_device *dev)
        intel_init_gt_powersave(dev);
        mutex_unlock(&dev->struct_mutex);

+       intel_disable_gt_powersave(dev);
        intel_modeset_init_hw(dev);

        intel_setup_overlay(dev);

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