[Intel-gfx] [PATCH 7/7] drm/i915: fbdev restore mode needs to invalidate frontbuffer

[Rodrigo Vivi]

This fbdev restore mode was another corner case that was now
calling frontbuffer flip and flush and making we miss
screen updates with PSR enabled.

So let's also add the invalidate hack here while we don't have
a reliable dirty fbdev op.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 drivers/gpu/drm/i915/intel_fbdev.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
index a76cebc..ae9b809 100644
--- a/drivers/gpu/drm/i915/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -831,11 +831,18 @@ void intel_fbdev_restore_mode(struct drm_device *dev)
 {
 	int ret;
 	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_fbdev *ifbdev = dev_priv->fbdev;
+	struct drm_fb_helper *fb_helper = &ifbdev->helper;
 
-	if (!dev_priv->fbdev)
+	if (!ifbdev)
 		return;
 
-	ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper);
+	ret = drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper);
 	if (ret)
 		DRM_DEBUG("failed to restore crtc mode\n");
+	else {
+		mutex_lock(&fb_helper->dev->struct_mutex);
+		intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
+		mutex_unlock(&fb_helper->dev->struct_mutex);
+	}
 }
-- 
2.1.0