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disp: msm: sde: avoid mutex lock for crtc flush event thread

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As per current design in crtc disable sequence event thread
can cause deadlock.This change avoids mutex lock for crtc
flush event thread to flush all event work.


Change-Id: Ia7156032bee9245fe84fd1621cf1994920b8e574
Signed-off-by: Narendra Muppalla <NarendraM@codeaurora.org>
This commit is contained in:
Narendra Muppalla 2020-10-13 13:09:56 -07:00
commit 47261ce97c
1 changed files with 6 additions and 1 deletions
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7
msm/sde/sde_crtc.c
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@ -4162,7 +4162,12 @@ static void sde_crtc_disable(struct drm_crtc *crtc)
msm_mode_object_event_notify(&crtc->base, crtc->dev, &event,
(u8 *)&power_on);
_sde_crtc_flush_event_thread(crtc);
if (atomic_read(&sde_crtc->frame_pending)) {
mutex_unlock(&sde_crtc->crtc_lock);
_sde_crtc_flush_event_thread(crtc);
mutex_lock(&sde_crtc->crtc_lock);
}
kthread_cancel_delayed_work_sync(&sde_crtc->static_cache_read_work);
kthread_cancel_delayed_work_sync(&sde_crtc->idle_notify_work);