[PATCH 6/6] drm/i915: Really wait for pending flips in intel_pipe_set_base()

[ville.syrjala@linux.intel.com]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Since obj->pending_flips was never set, intel_pipe_set_base() never
actually waited for pending page flips to complete.

We really do want to wait for the pending flips, because otherwise the
mmio surface base address update could overtake the flip, and you
could end up with an old frame on the screen once the flip really
completes.

Just call intel_crtc_wait_pending_flips_locked() instead of
intel_finish_fb() from intel_pipe_set_base() to achieve the
desired result.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a2e04f7..7e047c1 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2330,8 +2330,7 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
 		return ret;
 	}
 
-	if (crtc->fb)
-		intel_finish_fb(crtc->fb);
+	intel_crtc_wait_for_pending_flips_locked(crtc);
 
 	ret = dev_priv->display.update_plane(crtc, fb, x, y);
 	if (ret) {
-- 
1.7.12.4

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