Re: [PATCH] drm/msm/dpu: Clear perf params before calculating bw

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On 3/5/2025 7:46 PM, Jessica Zhang wrote:
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@xxxxxxxxxxx>
---
  drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)



Fixes: 795aef6f3653 ("drm/msm/dpu: remove duplicate code calculating sum of bandwidths")


Good catch!

Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>

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,





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