linux-kernel - [PATCH] drm/msm: ratelimit crtc event overflow error

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Message-Id: <20200701203602.1272157-1-robdclark@gmail.com>
Date:   Wed,  1 Jul 2020 13:36:00 -0700
From:   Rob Clark <robdclark@...il.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     Rob Clark <robdclark@...omium.org>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Drew Davenport <ddavenport@...omium.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Hongbo Yao <yaohongbo@...wei.com>,
        Kalyan Thota <kalyan_t@...eaurora.org>,
        linux-arm-msm@...r.kernel.org (open list:DRM DRIVER FOR MSM ADRENO GPU),
        freedreno@...ts.freedesktop.org (open list:DRM DRIVER FOR MSM ADRENO
        GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] drm/msm: ratelimit crtc event overflow error

From: Rob Clark <robdclark@...omium.org>

This can happen a lot when things go pear shaped.  Lets not flood dmesg
when this happens.

Signed-off-by: Rob Clark <robdclark@...omium.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index e15b42a780e0..969d95aa873c 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -389,7 +389,7 @@ static void dpu_crtc_frame_event_cb(void *data, u32 event)
 	spin_unlock_irqrestore(&dpu_crtc->spin_lock, flags);
 
 	if (!fevent) {
-		DRM_ERROR("crtc%d event %d overflow\n", crtc->base.id, event);
+		DRM_ERROR_RATELIMITED("crtc%d event %d overflow\n", crtc->base.id, event);
 		return;
 	}
 
-- 
2.26.2