drm/msm/dpu: extract bandwidth aggregation function

In preparation to refactoring the dpu_core_perf debugfs interface,
extract the bandwidth aggregation function from
_dpu_core_perf_crtc_update_bus().

Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/636058/
Link: https://lore.kernel.org/r/20250209-dpu-perf-rework-v5-1-87e936cf3004@linaro.org

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

@@ -210,36 +210,41 @@ int dpu_core_perf_crtc_check(struct drm_crtc *crtc,
 	return 0;
 }
 
-static int _dpu_core_perf_crtc_update_bus(struct dpu_kms *kms,
-		struct drm_crtc *crtc)
+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_core_perf_params perf = { 0 };
-	enum dpu_crtc_client_type curr_client_type
-					= dpu_crtc_get_client_type(crtc);
-	struct drm_crtc *tmp_crtc;
 	struct dpu_crtc_state *dpu_cstate;
-	int i, ret = 0;
-	u64 avg_bw;
-
-	if (!kms->num_paths)
-		return 0;
+	struct drm_crtc *tmp_crtc;
 
-	drm_for_each_crtc(tmp_crtc, crtc->dev) {
+	drm_for_each_crtc(tmp_crtc, ddev) {
 		if (tmp_crtc->enabled &&
-			curr_client_type ==
-				dpu_crtc_get_client_type(tmp_crtc)) {
+		    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->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;
+			perf->bw_ctl += dpu_cstate->new_perf.bw_ctl;
 
-			DRM_DEBUG_ATOMIC("crtc=%d bw=%llu paths:%d\n",
-				  tmp_crtc->base.id,
-				  dpu_cstate->new_perf.bw_ctl, kms->num_paths);
+			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)
+{
+	struct dpu_core_perf_params perf = { 0 };
+	int i, ret = 0;
+	u64 avg_bw;
+
+	if (!kms->num_paths)
+		return 0;
+
+	dpu_core_perf_aggregate(crtc->dev, dpu_crtc_get_client_type(crtc), &perf);
 
 	avg_bw = perf.bw_ctl;
 	do_div(avg_bw, (kms->num_paths * 1000)); /*Bps_to_icc*/