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drm/msm/mdp: add timeout for irq wait

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Make things recover a bit more gracefully if we get stuck with no vblank
irq ever coming.

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark 2014-03-24 09:12:24 -04:00
commit 30b6f8f679
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/msm/mdp/mdp_kms.c
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@ -101,7 +101,8 @@ void mdp_irq_wait(struct mdp_kms *mdp_kms, uint32_t irqmask)
.count = 1,
};
mdp_irq_register(mdp_kms, &wait.irq);
wait_event(wait_event, (wait.count <= 0));
wait_event_timeout(wait_event, (wait.count <= 0),
msecs_to_jiffies(100));
mdp_irq_unregister(mdp_kms, &wait.irq);
}