[PATCH 5/5 v2] drm/exynos: enable vsync interrupt while waiting for vblank

[Rahul Sharma]

mixer_wait_for_vblank function expects that the upcoming
vsync interrupt handler routine will clear the
wait_vsync_event atomic variable.
For this to happen, interrupts should be enabled and
disabled properly.

Signed-off-by: Rahul Sharma <rahul.sharma at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_mixer.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c 
b/drivers/gpu/drm/exynos/exynos_mixer.c
index 6f18581..7529946 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -1019,6 +1019,8 @@ static void mixer_wait_for_vblank(struct 
exynos_drm_manager *mgr)
        }
        mutex_unlock(&mixer_ctx->mixer_mutex);

+       drm_vblank_get(mgr->crtc->dev, mixer_ctx->pipe);
+
        atomic_set(&mixer_ctx->wait_vsync_event, 1);

        /*
@@ -1029,6 +1031,8 @@ static void mixer_wait_for_vblank(struct 
exynos_drm_manager *mgr)
                                !atomic_read(&mixer_ctx->wait_vsync_event),
                                HZ/20))
                DRM_DEBUG_KMS("vblank wait timed out.\n");
+
+       drm_vblank_put(mgr->crtc->dev, mixer_ctx->pipe);
 }

 static void mixer_window_suspend(struct exynos_drm_manager *mgr)
-- 
1.7.9.5