diff --git a/arch/arm64/boot/dts/exynos/exynos9810-starlte_eur_open_26.dts b/arch/arm64/boot/dts/exynos/exynos9810-starlte_eur_open_26.dts
index 5a9829747d9b..04453900859a 100644
--- a/arch/arm64/boot/dts/exynos/exynos9810-starlte_eur_open_26.dts
+++ b/arch/arm64/boot/dts/exynos/exynos9810-starlte_eur_open_26.dts
@@ -3245,7 +3245,7 @@
      1024 7533
     >;
     idle-cost-data = <
-     10
+     200
      0
      0
     >;
@@ -3265,7 +3265,7 @@
      198 250
     >;
     idle-cost-data = <
-     1
+     200
      0
      0
     >;
@@ -3295,8 +3295,8 @@
      1024 2490
     >;
     idle-cost-data = <
-     268
-     268
+     768
+     768
      0
     >;
    };
@@ -3315,8 +3315,8 @@
      198 58
     >;
     idle-cost-data = <
-     5
-     5
+     200
+     200
      0
     >;
    };
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 5c4cc8ece909..4d7cdb9a5307 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5854,8 +5854,11 @@ static int sched_group_energy(struct energy_env *eenv)
 				group_util = group_norm_util(eenv, sg);
 
 				sg_busy_energy = (group_util * sg->sge->cap_states[cap_idx].power);
-				sg_idle_energy = ((SCHED_CAPACITY_SCALE-group_util)
-								* sg->sge->idle_states[idle_idx].power);
+				sg_idle_energy = ((SCHED_CAPACITY_SCALE-group_util) 
+							* ((sg->sge->cap_states[cap_idx].power 
+								* sg->sge->idle_states[idle_idx].power)
+								>> SCHED_CAPACITY_SHIFT)
+							);
 
 				total_energy += sg_busy_energy + sg_idle_energy;