diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c index e3861ac492950b97773ceacbdc86557c2a914e08..de818831a51144393a6f237feb5d81077a1776bc 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c @@ -307,9 +307,6 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc, */ event->pipe = exynos_crtc->pipe; - list_add_tail(&event->base.link, - &dev_priv->pageflip_event_list); - ret = drm_vblank_get(dev, exynos_crtc->pipe); if (ret) { DRM_DEBUG("failed to acquire vblank counter\n"); @@ -318,6 +315,9 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc, goto out; } + list_add_tail(&event->base.link, + &dev_priv->pageflip_event_list); + crtc->fb = fb; ret = exynos_drm_crtc_update(crtc); if (ret) { diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c index b6a737d196ae556c6b038ad8243540a76f2271af..0dbb32bb18a359075f3421afea2f8ef856261dc9 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c @@ -604,7 +604,12 @@ static void fimd_finish_pageflip(struct drm_device *drm_dev, int crtc) } if (is_checked) { - drm_vblank_put(drm_dev, crtc); + /* + * call drm_vblank_put only in case that drm_vblank_get was + * called. + */ + if (atomic_read(&drm_dev->vblank_refcount[crtc]) > 0) + drm_vblank_put(drm_dev, crtc); /* * don't off vblank if vblank_disable_allowed is 1, diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index 47961679c44761d14fb8d2663324691195d7babb..93846e810e38c85c45f4a06d92e0f5306a89396e 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -712,7 +712,12 @@ static void mixer_finish_pageflip(struct drm_device *drm_dev, int crtc) } if (is_checked) - drm_vblank_put(drm_dev, crtc); + /* + * call drm_vblank_put only in case that drm_vblank_get was + * called. + */ + if (atomic_read(&drm_dev->vblank_refcount[crtc]) > 0) + drm_vblank_put(drm_dev, crtc); spin_unlock_irqrestore(&drm_dev->event_lock, flags); }