[Intel-gfx] [PATCH 09/14] drm/i915: enable display messages to GT on ValleyView

[Jesse Barnes]

Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
---
 drivers/gpu/drm/i915/intel_pm.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index d0ce2a5..4fa1a78 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3474,6 +3474,13 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
 
 	I915_WRITE(CACHE_MODE_1,
 		   _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
+
+	/*
+	 * On ValleyView, the GUnit needs to signal the GT
+	 * when flip and other events complete.  So enable
+	 * all the GUnit->GT interrupts here
+	 */
+	I915_WRITE(VLV_DPFLIPSTAT, 0x3f7f0000);
 }
 
 static void g4x_init_clock_gating(struct drm_device *dev)
-- 
1.7.9.5