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Subject[PATCH] drm/rockchip: Return -EBUSY if there's already a pending flip event v2
Date
As per the docs, atomic_commit should return -EBUSY "if an asycnhronous
updated is requested and there is an earlier updated pending".

v2: Use the status of the workqueue instead of vop->event, and don't add
a superfluous wait on the workqueue.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
---
drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
index 3b8f652698f8..285f8cd5afe1 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
@@ -282,6 +282,9 @@ int rockchip_drm_atomic_commit(struct drm_device *dev,
struct rockchip_atomic_commit *commit = &private->commit;
int ret;

+ if (async && work_busy(&commit->work))
+ return -EBUSY;
+
ret = drm_atomic_helper_prepare_planes(dev, state);
if (ret)
return ret;
--
2.5.5
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