linux-kernel - [PATCH] drm/msm/dpu: Clear perf params before calculating bw

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Message-ID: <20250305-perf-calc-fix-v1-1-d57f356caf59@quicinc.com>
Date: Wed, 5 Mar 2025 19:46:44 -0800
From: Jessica Zhang <quic_jesszhan@...cinc.com>
To: Rob Clark <robdclark@...il.com>,
        Dmitry Baryshkov
	<dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten
	<marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, "Simona
 Vetter" <simona@...ll.ch>
CC: Abhinav Kumar <quic_abhinavk@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>, <freedreno@...ts.freedesktop.org>,
        <linux-kernel@...r.kernel.org>,
        "Jessica
 Zhang" <quic_jesszhan@...cinc.com>
Subject: [PATCH] drm/msm/dpu: Clear perf params before calculating bw

To prevent incorrect BW calculation, zero out dpu_core_perf_params
before it is passed into dpu_core_perf_aggregate().

Signed-off-by: Jessica Zhang <quic_jesszhan@...cinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
index 7ff3405c68675..0fb5789c60d0d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
@@ -164,7 +164,7 @@ int dpu_core_perf_crtc_check(struct drm_crtc *crtc,
 	u32 bw, threshold;
 	struct dpu_crtc_state *dpu_cstate;
 	struct dpu_kms *kms;
-	struct dpu_core_perf_params perf;
+	struct dpu_core_perf_params perf = { 0 };
 
 	if (!crtc || !state) {
 		DPU_ERROR("invalid crtc\n");

---
base-commit: 6d3175a72cc07e90f81fb35841048a8a9b5134cb
change-id: 20250305-perf-calc-fix-07147a3ff410

Best regards,
-- 
Jessica Zhang <quic_jesszhan@...cinc.com>