From: Sean Paul <seanp...@chromium.org>

[ Upstream commit 3b712e43e3876b42b38321ecf790a1f5fe59c834 ]

Similar to the atomic helpers, we should enable vblank while we're
waiting for the commit to finish. DPU needs this, MDP5 seems to work
fine without it.

Reviewed-by: Abhinav Kumar <abhin...@codeaurora.org>
Signed-off-by: Sean Paul <seanp...@chromium.org>
Signed-off-by: Rob Clark <robdcl...@gmail.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/gpu/drm/msm/msm_atomic.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index c1f1779c980f..2b7bb6e166d3 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -32,7 +32,12 @@ static void msm_atomic_wait_for_commit_done(struct 
drm_device *dev,
                if (!new_crtc_state->active)
                        continue;
 
+               if (drm_crtc_vblank_get(crtc))
+                       continue;
+
                kms->funcs->wait_for_crtc_commit_done(kms, crtc);
+
+               drm_crtc_vblank_put(crtc);
        }
 }
 
-- 
2.19.1

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