From 6de9610ab55a04c225a1abee16be02241e8625cc Mon Sep 17 00:00:00 2001
From: Xu Wang <vulab@iscas.ac.cn>
Date: Thu, 31 Dec 2020 09:49:35 +0000
Subject: drm/msm/mdp5: Remove redundant null check before
 clk_prepare_enable/clk_disable_unprepare
Git-commit: 442f59b9c0dec876ccbad7e9839b3e969fcacd14
Patch-mainline: v5.16-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

Because clk_prepare_enable() and clk_disable_unprepare() already checked
NULL clock parameter, so the additional checks are unnecessary, just
remove them.

Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20201231094935.25737-1-vulab@iscas.ac.cn
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c  | 18 ++++++------------
 drivers/gpu/drm/msm/disp/mdp5/mdp5_mdss.c | 12 ++++--------
 2 files changed, 10 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index b3b42672b2d4..7b242246d4e7 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -295,15 +295,12 @@ static int mdp5_disable(struct mdp5_kms *mdp5_kms)
 	mdp5_kms->enable_count--;
 	WARN_ON(mdp5_kms->enable_count < 0);
 
-	if (mdp5_kms->tbu_rt_clk)
-		clk_disable_unprepare(mdp5_kms->tbu_rt_clk);
-	if (mdp5_kms->tbu_clk)
-		clk_disable_unprepare(mdp5_kms->tbu_clk);
+	clk_disable_unprepare(mdp5_kms->tbu_rt_clk);
+	clk_disable_unprepare(mdp5_kms->tbu_clk);
 	clk_disable_unprepare(mdp5_kms->ahb_clk);
 	clk_disable_unprepare(mdp5_kms->axi_clk);
 	clk_disable_unprepare(mdp5_kms->core_clk);
-	if (mdp5_kms->lut_clk)
-		clk_disable_unprepare(mdp5_kms->lut_clk);
+	clk_disable_unprepare(mdp5_kms->lut_clk);
 
 	return 0;
 }
@@ -317,12 +314,9 @@ static int mdp5_enable(struct mdp5_kms *mdp5_kms)
 	clk_prepare_enable(mdp5_kms->ahb_clk);
 	clk_prepare_enable(mdp5_kms->axi_clk);
 	clk_prepare_enable(mdp5_kms->core_clk);
-	if (mdp5_kms->lut_clk)
-		clk_prepare_enable(mdp5_kms->lut_clk);
-	if (mdp5_kms->tbu_clk)
-		clk_prepare_enable(mdp5_kms->tbu_clk);
-	if (mdp5_kms->tbu_rt_clk)
-		clk_prepare_enable(mdp5_kms->tbu_rt_clk);
+	clk_prepare_enable(mdp5_kms->lut_clk);
+	clk_prepare_enable(mdp5_kms->tbu_clk);
+	clk_prepare_enable(mdp5_kms->tbu_rt_clk);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_mdss.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_mdss.c
index 2f4895bcb0b0..0ea53420bc40 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_mdss.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_mdss.c
@@ -136,10 +136,8 @@ static int mdp5_mdss_enable(struct msm_mdss *mdss)
 	DBG("");
 
 	clk_prepare_enable(mdp5_mdss->ahb_clk);
-	if (mdp5_mdss->axi_clk)
-		clk_prepare_enable(mdp5_mdss->axi_clk);
-	if (mdp5_mdss->vsync_clk)
-		clk_prepare_enable(mdp5_mdss->vsync_clk);
+	clk_prepare_enable(mdp5_mdss->axi_clk);
+	clk_prepare_enable(mdp5_mdss->vsync_clk);
 
 	return 0;
 }
@@ -149,10 +147,8 @@ static int mdp5_mdss_disable(struct msm_mdss *mdss)
 	struct mdp5_mdss *mdp5_mdss = to_mdp5_mdss(mdss);
 	DBG("");
 
-	if (mdp5_mdss->vsync_clk)
-		clk_disable_unprepare(mdp5_mdss->vsync_clk);
-	if (mdp5_mdss->axi_clk)
-		clk_disable_unprepare(mdp5_mdss->axi_clk);
+	clk_disable_unprepare(mdp5_mdss->vsync_clk);
+	clk_disable_unprepare(mdp5_mdss->axi_clk);
 	clk_disable_unprepare(mdp5_mdss->ahb_clk);
 
 	return 0;
-- 
2.38.1