From 5db6a5c009dc14bcf247298cfc43236d5ac30038 Mon Sep 17 00:00:00 2001
From: Finley Xiao <finley.xiao@rock-chips.com>
Date: Fri, 8 Jan 2021 14:13:51 +0800
Subject: [PATCH] soc: rockchip: ipa: Make static coefficient more accurate
 when leakage is 0

Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
Change-Id: Ic9326b41a818b16645ba8466952376f2acd5da55
---
 drivers/soc/rockchip/rockchip_ipa.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/soc/rockchip/rockchip_ipa.c b/drivers/soc/rockchip/rockchip_ipa.c
index bcc39692bfcd..927fbfbc1313 100644
--- a/drivers/soc/rockchip/rockchip_ipa.c
+++ b/drivers/soc/rockchip/rockchip_ipa.c
@@ -25,9 +25,12 @@ static void calculate_static_coefficient(struct ipa_power_model_data *data)
 	u32 static_coeff = data->static_coefficient;
 	u32 lkg_scaling_factor;
 
-	/* leakage=0, use static_coefficient in devicetree */
-	if (!lkg)
-		return;
+	if (!lkg) {
+		if (ref_lkg)
+			lkg = ref_lkg;
+		else
+			lkg = (min + max) / 2;
+	}
 	if (ref_lkg) {
 		data->static_coefficient = static_coeff * lkg / ref_lkg;
 		return;