[PATCH AUTOSEL 4.19 16/73] drm/msm: Grab a vblank reference when waiting for commit_done

Sasha Levin
2018-12-13T04:51:45Z

From: Sean Paul <seanpaul@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 <abhinavk@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Sasha Levin <sashal@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