drm/i915: Set AGPBUSY# bit in init_clock_gating

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / i915 / intel_pm.c

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index b86edac51be2285719b49deaee11421d77e3b344..71de9eec33812c9fe6d4bf99d63b86ebc89aebb9 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5504,6 +5504,9 @@ static void gen3_init_clock_gating(struct drm_device *dev)
 
        /* IIR "flip pending" means done if this bit is set */
        I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE));
+
+       /* interrupts should cause a wake up from C3 */
+       I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
 }
 
 static void i85x_init_clock_gating(struct drm_device *dev)