drm/exynos: fixed page flip issue.
with vblank_refcount = 1, there was the case that drm_vblank_put
is called by specific page flip function so this patch fixes the
issue.
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index e3861ac..de81883 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -307,9 +307,6 @@
*/
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 @@
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 b6a737d..0dbb32b 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -604,7 +604,12 @@
}
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 4796167..93846e8 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -712,7 +712,12 @@
}
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);
}