4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
[ Upstream commit c6721b3c6423d8a348ae885a0f4c85e14f9bf85c ]
Flush queued events when disabling the crtc. This avoids timeouts when
we come back and wait for dependencies (like the previous frame's
flip_done).
Fixes: c8afe684c95c ("drm/msm: basic KMS driver for snapdragon")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
Patchwork: https://patchwork.freedesktop.org/patch/569127/
Link: https://lore.kernel.org/r/20231127215401.4064128-1-dmitry.baryshkov@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c
index 457c29dba4a1..6d3074db8975 100644
--- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c
+++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c
@@ -284,6 +284,7 @@ static void mdp4_crtc_atomic_disable(struct drm_crtc *crtc,
{
struct mdp4_crtc *mdp4_crtc = to_mdp4_crtc(crtc);
struct mdp4_kms *mdp4_kms = get_kms(crtc);
+ unsigned long flags;
DBG("%s", mdp4_crtc->name);
@@ -296,6 +297,14 @@ static void mdp4_crtc_atomic_disable(struct drm_crtc *crtc,
mdp_irq_unregister(&mdp4_kms->base, &mdp4_crtc->err);
mdp4_disable(mdp4_kms);
+ if (crtc->state->event && !crtc->state->active) {
+ WARN_ON(mdp4_crtc->event);
+ spin_lock_irqsave(&mdp4_kms->dev->event_lock, flags);
+ drm_crtc_send_vblank_event(crtc, crtc->state->event);
+ crtc->state->event = NULL;
+ spin_unlock_irqrestore(&mdp4_kms->dev->event_lock, flags);
+ }
+
mdp4_crtc->enabled = false;
}
--
2.43.0
