drm/msm/dpu: remove duplicate code calculating sum of bandwidths

The code in dpu_core_perf_crtc_check() mostly duplicates code in
dpu_core_perf_aggregate(). Remove the duplication by reusing the latter
function.

Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/636059/
Link: https://lore.kernel.org/r/20250209-dpu-perf-rework-v5-2-87e936cf3004@linaro.org

drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c

@@ -140,6 +140,30 @@ static void _dpu_core_perf_calc_crtc(const struct dpu_core_perf *core_perf,
 			perf->max_per_pipe_ib, perf->bw_ctl);
 }
 
+static void dpu_core_perf_aggregate(struct drm_device *ddev,
+				    enum dpu_crtc_client_type curr_client_type,
+				    struct dpu_core_perf_params *perf)
+{
+	struct dpu_crtc_state *dpu_cstate;
+	struct drm_crtc *tmp_crtc;
+
+	drm_for_each_crtc(tmp_crtc, ddev) {
+		if (tmp_crtc->enabled &&
+		    curr_client_type == dpu_crtc_get_client_type(tmp_crtc)) {
+			dpu_cstate = to_dpu_crtc_state(tmp_crtc->state);
+
+			perf->max_per_pipe_ib = max(perf->max_per_pipe_ib,
+						    dpu_cstate->new_perf.max_per_pipe_ib);
+
+			perf->bw_ctl += dpu_cstate->new_perf.bw_ctl;
+
+			DRM_DEBUG_ATOMIC("crtc=%d bw=%llu\n",
+					 tmp_crtc->base.id,
+					 dpu_cstate->new_perf.bw_ctl);
+		}
+	}
+}
+
 /**
  * dpu_core_perf_crtc_check - validate performance of the given crtc state
  * @crtc: Pointer to crtc
@@ -150,11 +174,9 @@ int dpu_core_perf_crtc_check(struct drm_crtc *crtc,
 		struct drm_crtc_state *state)
 {
 	u32 bw, threshold;
-	u64 bw_sum_of_intfs = 0;
-	enum dpu_crtc_client_type curr_client_type;
 	struct dpu_crtc_state *dpu_cstate;
-	struct drm_crtc *tmp_crtc;
 	struct dpu_kms *kms;
+	struct dpu_core_perf_params perf;
 
 	if (!crtc || !state) {
 		DPU_ERROR("invalid crtc\n");
@@ -172,68 +194,28 @@ int dpu_core_perf_crtc_check(struct drm_crtc *crtc,
 	/* obtain new values */
 	_dpu_core_perf_calc_crtc(&kms->perf, crtc, state, &dpu_cstate->new_perf);
 
-	bw_sum_of_intfs = dpu_cstate->new_perf.bw_ctl;
-	curr_client_type = dpu_crtc_get_client_type(crtc);
-
-	drm_for_each_crtc(tmp_crtc, crtc->dev) {
-		if (tmp_crtc->enabled &&
-		    dpu_crtc_get_client_type(tmp_crtc) == curr_client_type &&
-		    tmp_crtc != crtc) {
-			struct dpu_crtc_state *tmp_cstate =
-				to_dpu_crtc_state(tmp_crtc->state);
-
-			DRM_DEBUG_ATOMIC("crtc:%d bw:%llu ctrl:%d\n",
-					 tmp_crtc->base.id, tmp_cstate->new_perf.bw_ctl,
-					 tmp_cstate->bw_control);
-
-			bw_sum_of_intfs += tmp_cstate->new_perf.bw_ctl;
-		}
+	dpu_core_perf_aggregate(crtc->dev, dpu_crtc_get_client_type(crtc), &perf);
 
-		/* convert bandwidth to kb */
-		bw = DIV_ROUND_UP_ULL(bw_sum_of_intfs, 1000);
-		DRM_DEBUG_ATOMIC("calculated bandwidth=%uk\n", bw);
+	/* convert bandwidth to kb */
+	bw = DIV_ROUND_UP_ULL(perf.bw_ctl, 1000);
+	DRM_DEBUG_ATOMIC("calculated bandwidth=%uk\n", bw);
 
-		threshold = kms->perf.perf_cfg->max_bw_high;
+	threshold = kms->perf.perf_cfg->max_bw_high;
 
-		DRM_DEBUG_ATOMIC("final threshold bw limit = %d\n", threshold);
+	DRM_DEBUG_ATOMIC("final threshold bw limit = %d\n", threshold);
 
-		if (!threshold) {
-			DPU_ERROR("no bandwidth limits specified\n");
-			return -E2BIG;
-		} else if (bw > threshold) {
-			DPU_ERROR("exceeds bandwidth: %ukb > %ukb\n", bw,
-					threshold);
-			return -E2BIG;
-		}
+	if (!threshold) {
+		DPU_ERROR("no bandwidth limits specified\n");
+		return -E2BIG;
+	} else if (bw > threshold) {
+		DPU_ERROR("exceeds bandwidth: %ukb > %ukb\n", bw,
+				threshold);
+		return -E2BIG;
 	}
 
 	return 0;
 }
 
-static void dpu_core_perf_aggregate(struct drm_device *ddev,
-				    enum dpu_crtc_client_type curr_client_type,
-				    struct dpu_core_perf_params *perf)
-{
-	struct dpu_crtc_state *dpu_cstate;
-	struct drm_crtc *tmp_crtc;
-
-	drm_for_each_crtc(tmp_crtc, ddev) {
-		if (tmp_crtc->enabled &&
-		    curr_client_type == dpu_crtc_get_client_type(tmp_crtc)) {
-			dpu_cstate = to_dpu_crtc_state(tmp_crtc->state);
-
-			perf->max_per_pipe_ib = max(perf->max_per_pipe_ib,
-						    dpu_cstate->new_perf.max_per_pipe_ib);
-
-			perf->bw_ctl += dpu_cstate->new_perf.bw_ctl;
-
-			DRM_DEBUG_ATOMIC("crtc=%d bw=%llu\n",
-					 tmp_crtc->base.id,
-					 dpu_cstate->new_perf.bw_ctl);
-		}
-	}
-}
-
 static int _dpu_core_perf_crtc_update_bus(struct dpu_kms *kms,
 					  struct drm_crtc *crtc)
 {