[Intel-gfx] [PATCH] fix i915 regression: only top 20% of screen works in X

[Pavel Machek]

Fix regression where only 20% of screen works in X. This is manual
revert of a51435a3137ad8ae75c288c39bd2d8b2696bae8f.

Signed-off-by: Pavel Machek <pavel at ucw.cz>


diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 6bc68bd..cf63c67 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -447,6 +447,11 @@ static int init_ring_common(struct intel_ring_buffer *ring)
 
 	gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
 
+	if (I915_NEED_GFX_HWS(dev))
+		intel_ring_setup_status_page(ring);
+	else
+		ring_setup_phys_status_page(ring);
+
 	/* Stop the ring if it's running. */
 	I915_WRITE_CTL(ring, 0);
 	I915_WRITE_HEAD(ring, 0);
@@ -454,11 +459,6 @@ static int init_ring_common(struct intel_ring_buffer *ring)
 	if (wait_for_atomic((I915_READ_MODE(ring) & MODE_IDLE) != 0, 1000))
 		DRM_ERROR("%s :timed out trying to stop ring\n", ring->name);
 
-	if (I915_NEED_GFX_HWS(dev))
-		intel_ring_setup_status_page(ring);
-	else
-		ring_setup_phys_status_page(ring);
-
 	head = I915_READ_HEAD(ring) & HEAD_ADDR;
 
 	/* G45 ring initialization fails to reset head to zero */


-- 
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