From 1e897dcc4c673b9d585c09ddcdbe7fab0934e64f Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Sat, 2 Dec 2023 00:18:37 +0300
Subject: [PATCH] drm/msm/dpu: use devres-managed allocation for MDP TOP
Git-commit: 1e897dcc4c673b9d585c09ddcdbe7fab0934e64f
Patch-mainline: v6.8-rc1
References: stable-fixes

Use devm_kzalloc to create MDP TOP structure. This allows us to remove
corresponding kfree and drop dpu_hw_mdp_destroy() function.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/570047/
Link: https://lore.kernel.org/r/20231201211845.1026967-6-dmitry.baryshkov@linaro.org
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c | 17 +++++++----------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.h |  8 +++++---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c    |  5 ++---
 3 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c
index 24e734768a72..05e48cf4ec1d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c
@@ -2,6 +2,8 @@
 /* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
  */
 
+#include <drm/drm_managed.h>
+
 #include "dpu_hwio.h"
 #include "dpu_hw_catalog.h"
 #include "dpu_hw_top.h"
@@ -247,16 +249,17 @@ static void _setup_mdp_ops(struct dpu_hw_mdp_ops *ops,
 		ops->intf_audio_select = dpu_hw_intf_audio_select;
 }
 
-struct dpu_hw_mdp *dpu_hw_mdptop_init(const struct dpu_mdp_cfg *cfg,
-		void __iomem *addr,
-		const struct dpu_mdss_cfg *m)
+struct dpu_hw_mdp *dpu_hw_mdptop_init(struct drm_device *dev,
+				      const struct dpu_mdp_cfg *cfg,
+				      void __iomem *addr,
+				      const struct dpu_mdss_cfg *m)
 {
 	struct dpu_hw_mdp *mdp;
 
 	if (!addr)
 		return ERR_PTR(-EINVAL);
 
-	mdp = kzalloc(sizeof(*mdp), GFP_KERNEL);
+	mdp = drmm_kzalloc(dev, sizeof(*mdp), GFP_KERNEL);
 	if (!mdp)
 		return ERR_PTR(-ENOMEM);
 
@@ -271,9 +274,3 @@ struct dpu_hw_mdp *dpu_hw_mdptop_init(const struct dpu_mdp_cfg *cfg,
 
 	return mdp;
 }
-
-void dpu_hw_mdp_destroy(struct dpu_hw_mdp *mdp)
-{
-	kfree(mdp);
-}
-
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.h
index 8b1463d2b2f0..6f3dc98087df 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.h
@@ -145,13 +145,15 @@ struct dpu_hw_mdp {
 
 /**
  * dpu_hw_mdptop_init - initializes the top driver for the passed config
+ * @dev:  Corresponding device for devres management
  * @cfg:  MDP TOP configuration from catalog
  * @addr: Mapped register io address of MDP
  * @m:    Pointer to mdss catalog data
  */
-struct dpu_hw_mdp *dpu_hw_mdptop_init(const struct dpu_mdp_cfg *cfg,
-		void __iomem *addr,
-		const struct dpu_mdss_cfg *m);
+struct dpu_hw_mdp *dpu_hw_mdptop_init(struct drm_device *dev,
+				      const struct dpu_mdp_cfg *cfg,
+				      void __iomem *addr,
+				      const struct dpu_mdss_cfg *m);
 
 void dpu_hw_mdp_destroy(struct dpu_hw_mdp *mdp);
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index a1753c54aaac..5fcb256302b2 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -810,8 +810,6 @@ static void _dpu_kms_hw_destroy(struct dpu_kms *dpu_kms)
 
 	dpu_kms->catalog = NULL;
 
-	if (dpu_kms->hw_mdp)
-		dpu_hw_mdp_destroy(dpu_kms->hw_mdp);
 	dpu_kms->hw_mdp = NULL;
 }
 
@@ -1090,7 +1088,8 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 
 	dpu_kms->rm_init = true;
 
-	dpu_kms->hw_mdp = dpu_hw_mdptop_init(dpu_kms->catalog->mdp,
+	dpu_kms->hw_mdp = dpu_hw_mdptop_init(dev,
+					     dpu_kms->catalog->mdp,
 					     dpu_kms->mmio,
 					     dpu_kms->catalog);
 	if (IS_ERR(dpu_kms->hw_mdp)) {
-- 
2.43.0