[Intel-gfx] [PATCH 5/6] drm/i915: Add intel_crtc_wait_for_pending_flips_locked()

[ville.syrjala at linux.intel.com]

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

Move the functionality of intel_crtc_wait_for_pending_flips()
into intel_crtc_wait_for_pending_flips_locked().

intel_crtc_wait_for_pending_flips() is now just a wrapper that
grab struct_mutex and calls intel_crtc_wait_for_pending_flips_locked().

This changes the behaviour of intel_crtc_wait_for_pending_flips()
so that it now holds struct_mutex while waiting for pending flips.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 6c21985..a2e04f7 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2281,6 +2281,22 @@ static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc)
 	return pending;
 }
 
+static void intel_crtc_wait_for_pending_flips_locked(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+
+	if (crtc->fb == NULL)
+		return;
+
+	WARN_ON(waitqueue_active(&dev_priv->pending_flip_queue));
+
+	wait_event(dev_priv->pending_flip_queue,
+		   !intel_crtc_has_pending_flip(crtc));
+
+	intel_finish_fb(crtc->fb);
+}
+
 static int
 intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
 		    struct drm_framebuffer *fb)
@@ -2880,18 +2896,12 @@ static void ironlake_fdi_disable(struct drm_crtc *crtc)
 static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
 
 	if (crtc->fb == NULL)
 		return;
 
-	WARN_ON(waitqueue_active(&dev_priv->pending_flip_queue));
-
-	wait_event(dev_priv->pending_flip_queue,
-		   !intel_crtc_has_pending_flip(crtc));
-
 	mutex_lock(&dev->struct_mutex);
-	intel_finish_fb(crtc->fb);
+	intel_crtc_wait_for_pending_flips_locked(crtc);
 	mutex_unlock(&dev->struct_mutex);
 }
 
-- 
1.7.12.4