[PATCH v4 00/13] drm/msm/dpu: use managed memory allocations

[PATCH v4 00/13] drm/msm/dpu: use managed memory allocations

[Dmitry Baryshkov]

In a lots of places in DPU driver memory is allocated by using the
kzalloc and then manually freed using kfree. However thes memory chunks
have a well-defined life cycle. They are either a part of the driver's
runtime and can be devm_kzalloc'ed or are exposed to userspace via the
DRM objects and thus can be drmm_alloc'ed. Implement corresponding
runtime resource manangement for the DPU driver.

Changes since v3:
- Rebased on top of msm-next

Changes since v2:
- Added missing dependencies to the cover letter (Jessica)
- Fixed commit message for patch 4 (Jessica)

Changes since v1:
- Fix error handling for some of drmm_foo_alloc() functions, which
  return error pointer in case of an error rather than typical NULL.

Dmitry Baryshkov (13):
  drm/msm/dpu: cleanup dpu_kms_hw_init error path
  drm/msm/dpu: remove IS_ERR_OR_NULL for dpu_hw_intr_init() error
    handling
  drm/msm/dpu: use devres-managed allocation for interrupts data
  drm/msm/dpu: use devres-managed allocation for VBIF data
  drm/msm/dpu: use devres-managed allocation for MDP TOP
  drm/msm/dpu: use devres-managed allocation for HW blocks
  drm/msm/dpu: drop unused dpu_plane::lock
  drm/msm/dpu: remove QoS teardown on plane destruction
  drm/msm/dpu: use drmm-managed allocation for dpu_plane
  drm/msm/dpu: use drmm-managed allocation for dpu_crtc
  drm/msm/dpu: use drmm-managed allocation for dpu_encoder_phys
  drm/msm/dpu: drop dpu_encoder_phys_ops::destroy
  drm/msm/dpu: use drmm-managed allocation for dpu_encoder_virt

 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c      | 25 ++----
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c   | 77 ++++------------
 .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h  | 10 +--
 .../drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c  | 15 +---
 .../drm/msm/disp/dpu1/dpu_encoder_phys_vid.c  | 13 +--
 .../drm/msm/disp/dpu1/dpu_encoder_phys_wb.c   | 21 +----
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c    | 19 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h    | 16 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c    | 12 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h    | 10 ++-
 .../gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c    |  7 +-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c   | 16 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h   | 12 +--
 .../gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c | 14 ++-
 .../gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h | 11 +--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c   | 16 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h   | 13 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c     | 14 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h     | 12 +--
 .../gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.c    | 14 ++-
 .../gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.h    | 13 +--
 .../gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c   | 15 ++--
 .../gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h   | 14 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c   | 17 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h   | 16 ++--
 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_hw_vbif.c   | 14 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.h   |  8 +-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c     | 15 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h     | 13 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c       | 55 ++++--------
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h       |  1 -
 drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c     | 59 +++---------
 drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c        | 90 +++----------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h        | 11 +--
 36 files changed, 226 insertions(+), 487 deletions(-)

-- 
2.39.2

[PATCH v4 01/13] drm/msm/dpu: cleanup dpu_kms_hw_init error path

[Dmitry Baryshkov]

It was noticed that dpu_kms_hw_init()'s error path contains several
labels which point to the same code path. Replace all of them with a
single label.

Suggested-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 25 +++++++++++--------------
 1 file changed, 11 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index fe7267b3bff5..3b6ed60e1143 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -1078,7 +1078,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 	if (!dpu_kms->catalog) {
 		DPU_ERROR("device config not known!\n");
 		rc = -EINVAL;
-		goto power_error;
+		goto err_pm_put;
 	}
 
 	/*
@@ -1088,26 +1088,26 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 	rc = _dpu_kms_mmu_init(dpu_kms);
 	if (rc) {
 		DPU_ERROR("dpu_kms_mmu_init failed: %d\n", rc);
-		goto power_error;
+		goto err_pm_put;
 	}
 
 	dpu_kms->mdss = msm_mdss_get_mdss_data(dpu_kms->pdev->dev.parent);
 	if (IS_ERR(dpu_kms->mdss)) {
 		rc = PTR_ERR(dpu_kms->mdss);
 		DPU_ERROR("failed to get MDSS data: %d\n", rc);
-		goto power_error;
+		goto err_pm_put;
 	}
 
 	if (!dpu_kms->mdss) {
 		rc = -EINVAL;
 		DPU_ERROR("NULL MDSS data\n");
-		goto power_error;
+		goto err_pm_put;
 	}
 
 	rc = dpu_rm_init(&dpu_kms->rm, dpu_kms->catalog, dpu_kms->mdss, dpu_kms->mmio);
 	if (rc) {
 		DPU_ERROR("rm init failed: %d\n", rc);
-		goto power_error;
+		goto err_pm_put;
 	}
 
 	dpu_kms->rm_init = true;
@@ -1119,7 +1119,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 		rc = PTR_ERR(dpu_kms->hw_mdp);
 		DPU_ERROR("failed to get hw_mdp: %d\n", rc);
 		dpu_kms->hw_mdp = NULL;
-		goto power_error;
+		goto err_pm_put;
 	}
 
 	for (i = 0; i < dpu_kms->catalog->vbif_count; i++) {
@@ -1130,7 +1130,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 		if (IS_ERR(hw)) {
 			rc = PTR_ERR(hw);
 			DPU_ERROR("failed to init vbif %d: %d\n", vbif->id, rc);
-			goto power_error;
+			goto err_pm_put;
 		}
 
 		dpu_kms->hw_vbif[vbif->id] = hw;
@@ -1146,7 +1146,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 	rc = dpu_core_perf_init(&dpu_kms->perf, dpu_kms->catalog->perf, max_core_clk_rate);
 	if (rc) {
 		DPU_ERROR("failed to init perf %d\n", rc);
-		goto perf_err;
+		goto err_pm_put;
 	}
 
 	dpu_kms->hw_intr = dpu_hw_intr_init(dpu_kms->mmio, dpu_kms->catalog);
@@ -1154,7 +1154,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 		rc = PTR_ERR(dpu_kms->hw_intr);
 		DPU_ERROR("hw_intr init failed: %d\n", rc);
 		dpu_kms->hw_intr = NULL;
-		goto hw_intr_init_err;
+		goto err_pm_put;
 	}
 
 	dev->mode_config.min_width = 0;
@@ -1179,7 +1179,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 	rc = _dpu_kms_drm_obj_init(dpu_kms);
 	if (rc) {
 		DPU_ERROR("modeset init failed: %d\n", rc);
-		goto drm_obj_init_err;
+		goto err_pm_put;
 	}
 
 	dpu_vbif_init_memtypes(dpu_kms);
@@ -1188,10 +1188,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 
 	return 0;
 
-drm_obj_init_err:
-hw_intr_init_err:
-perf_err:
-power_error:
+err_pm_put:
 	pm_runtime_put_sync(&dpu_kms->pdev->dev);
 error:
 	_dpu_kms_hw_destroy(dpu_kms);
-- 
2.39.2

[PATCH v4 02/13] drm/msm/dpu: remove IS_ERR_OR_NULL for dpu_hw_intr_init() error handling

[Dmitry Baryshkov]

Using IS_ERR_OR_NULL() together with PTR_ERR() is a typical mistake. If
the value is NULL, then the function will return 0 instead of a proper
return code. Replace IS_ERR_OR_NULL() with IS_ERR() in the
dpu_hw_intr_init() error check.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 3b6ed60e1143..8fa1f8f52e70 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -1150,7 +1150,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 	}
 
 	dpu_kms->hw_intr = dpu_hw_intr_init(dpu_kms->mmio, dpu_kms->catalog);
-	if (IS_ERR_OR_NULL(dpu_kms->hw_intr)) {
+	if (IS_ERR(dpu_kms->hw_intr)) {
 		rc = PTR_ERR(dpu_kms->hw_intr);
 		DPU_ERROR("hw_intr init failed: %d\n", rc);
 		dpu_kms->hw_intr = NULL;
-- 
2.39.2

[PATCH v4 03/13] drm/msm/dpu: use devres-managed allocation for interrupts data

[Dmitry Baryshkov]

Use devm_kzalloc to create interrupts data structure. This allows us to
remove corresponding kfree and drop dpu_hw_intr_destroy() function.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c | 14 ++++++--------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h | 11 ++++-------
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c           |  4 +---
 3 files changed, 11 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
index 088807db2c83..946dd0135dff 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
@@ -6,6 +6,8 @@
 #include <linux/debugfs.h>
 #include <linux/slab.h>
 
+#include <drm/drm_managed.h>
+
 #include "dpu_core_irq.h"
 #include "dpu_kms.h"
 #include "dpu_hw_interrupts.h"
@@ -472,8 +474,9 @@ u32 dpu_core_irq_read(struct dpu_kms *dpu_kms,
 	return intr_status;
 }
 
-struct dpu_hw_intr *dpu_hw_intr_init(void __iomem *addr,
-		const struct dpu_mdss_cfg *m)
+struct dpu_hw_intr *dpu_hw_intr_init(struct drm_device *dev,
+				     void __iomem *addr,
+				     const struct dpu_mdss_cfg *m)
 {
 	struct dpu_hw_intr *intr;
 	unsigned int i;
@@ -481,7 +484,7 @@ struct dpu_hw_intr *dpu_hw_intr_init(void __iomem *addr,
 	if (!addr || !m)
 		return ERR_PTR(-EINVAL);
 
-	intr = kzalloc(sizeof(*intr), GFP_KERNEL);
+	intr = drmm_kzalloc(dev, sizeof(*intr), GFP_KERNEL);
 	if (!intr)
 		return ERR_PTR(-ENOMEM);
 
@@ -512,11 +515,6 @@ struct dpu_hw_intr *dpu_hw_intr_init(void __iomem *addr,
 	return intr;
 }
 
-void dpu_hw_intr_destroy(struct dpu_hw_intr *intr)
-{
-	kfree(intr);
-}
-
 int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms,
 				   unsigned int irq_idx,
 				   void (*irq_cb)(void *arg),
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
index 53a21ebc57e8..564b750a28fe 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
@@ -70,15 +70,12 @@ struct dpu_hw_intr {
 
 /**
  * dpu_hw_intr_init(): Initializes the interrupts hw object
+ * @dev:  Corresponding device for devres management
  * @addr: mapped register io address of MDP
  * @m:    pointer to MDSS catalog data
  */
-struct dpu_hw_intr *dpu_hw_intr_init(void __iomem *addr,
-		const struct dpu_mdss_cfg *m);
+struct dpu_hw_intr *dpu_hw_intr_init(struct drm_device *dev,
+				     void __iomem *addr,
+				     const struct dpu_mdss_cfg *m);
 
-/**
- * dpu_hw_intr_destroy(): Cleanup interrutps hw object
- * @intr: pointer to interrupts hw object
- */
-void dpu_hw_intr_destroy(struct dpu_hw_intr *intr);
 #endif
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 8fa1f8f52e70..0afaea894b31 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -806,8 +806,6 @@ static void _dpu_kms_hw_destroy(struct dpu_kms *dpu_kms)
 {
 	int i;
 
-	if (dpu_kms->hw_intr)
-		dpu_hw_intr_destroy(dpu_kms->hw_intr);
 	dpu_kms->hw_intr = NULL;
 
 	/* safe to call these more than once during shutdown */
@@ -1149,7 +1147,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 		goto err_pm_put;
 	}
 
-	dpu_kms->hw_intr = dpu_hw_intr_init(dpu_kms->mmio, dpu_kms->catalog);
+	dpu_kms->hw_intr = dpu_hw_intr_init(dev, dpu_kms->mmio, dpu_kms->catalog);
 	if (IS_ERR(dpu_kms->hw_intr)) {
 		rc = PTR_ERR(dpu_kms->hw_intr);
 		DPU_ERROR("hw_intr init failed: %d\n", rc);
-- 
2.39.2

[PATCH v4 04/13] drm/msm/dpu: use devres-managed allocation for VBIF data

[Dmitry Baryshkov]

Use devm_kzalloc to create VBIF data structure. This allows us to
remove corresponding kfree and drop dpu_hw_vbif_destroy() function.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.c | 14 ++++++--------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.h |  8 ++++----
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c     | 11 +++--------
 3 files changed, 13 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.c
index a5121a50b2bb..98e34afde2d2 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.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_vbif.h"
@@ -211,12 +213,13 @@ static void _setup_vbif_ops(struct dpu_hw_vbif_ops *ops,
 	ops->set_write_gather_en = dpu_hw_set_write_gather_en;
 }
 
-struct dpu_hw_vbif *dpu_hw_vbif_init(const struct dpu_vbif_cfg *cfg,
-		void __iomem *addr)
+struct dpu_hw_vbif *dpu_hw_vbif_init(struct drm_device *dev,
+				     const struct dpu_vbif_cfg *cfg,
+				     void __iomem *addr)
 {
 	struct dpu_hw_vbif *c;
 
-	c = kzalloc(sizeof(*c), GFP_KERNEL);
+	c = drmm_kzalloc(dev, sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return ERR_PTR(-ENOMEM);
 
@@ -234,8 +237,3 @@ struct dpu_hw_vbif *dpu_hw_vbif_init(const struct dpu_vbif_cfg *cfg,
 
 	return c;
 }
-
-void dpu_hw_vbif_destroy(struct dpu_hw_vbif *vbif)
-{
-	kfree(vbif);
-}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.h
index 7e10d2a172b4..e2b4307500e4 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.h
@@ -108,12 +108,12 @@ struct dpu_hw_vbif {
 /**
  * dpu_hw_vbif_init() - Initializes the VBIF driver for the passed
  * VBIF catalog entry.
+ * @dev:  Corresponding device for devres management
  * @cfg:  VBIF catalog entry for which driver object is required
  * @addr: Mapped register io address of MDSS
  */
-struct dpu_hw_vbif *dpu_hw_vbif_init(const struct dpu_vbif_cfg *cfg,
-		void __iomem *addr);
-
-void dpu_hw_vbif_destroy(struct dpu_hw_vbif *vbif);
+struct dpu_hw_vbif *dpu_hw_vbif_init(struct drm_device *dev,
+				     const struct dpu_vbif_cfg *cfg,
+				     void __iomem *addr);
 
 #endif /*_DPU_HW_VBIF_H */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 0afaea894b31..e1fbac351fc2 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -811,13 +811,8 @@ static void _dpu_kms_hw_destroy(struct dpu_kms *dpu_kms)
 	/* safe to call these more than once during shutdown */
 	_dpu_kms_mmu_destroy(dpu_kms);
 
-	if (dpu_kms->catalog) {
-		for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) {
-			if (dpu_kms->hw_vbif[i]) {
-				dpu_hw_vbif_destroy(dpu_kms->hw_vbif[i]);
-				dpu_kms->hw_vbif[i] = NULL;
-			}
-		}
+	for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) {
+		dpu_kms->hw_vbif[i] = NULL;
 	}
 
 	if (dpu_kms->rm_init)
@@ -1124,7 +1119,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 		struct dpu_hw_vbif *hw;
 		const struct dpu_vbif_cfg *vbif = &dpu_kms->catalog->vbif[i];
 
-		hw = dpu_hw_vbif_init(vbif, dpu_kms->vbif[vbif->id]);
+		hw = dpu_hw_vbif_init(dev, vbif, dpu_kms->vbif[vbif->id]);
 		if (IS_ERR(hw)) {
 			rc = PTR_ERR(hw);
 			DPU_ERROR("failed to init vbif %d: %d\n", vbif->id, rc);
-- 
2.39.2

[PATCH v4 05/13] drm/msm/dpu: use devres-managed allocation for MDP TOP

[Dmitry Baryshkov]

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>
---
 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 e1fbac351fc2..c675c9a76c74 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -821,8 +821,6 @@ 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;
 }
 
@@ -1105,7 +1103,8 @@ 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)) {
-- 
2.39.2

[PATCH v4 06/13] drm/msm/dpu: use devres-managed allocation for HW blocks

[Dmitry Baryshkov]

Use devm_kzalloc to create HW block structure. This allows us to remove
corresponding kfree and drop all dpu_hw_*_destroy() functions as well as
dpu_rm_destroy(), which becomes empty afterwards.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c    | 19 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h    | 16 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c    | 12 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h    | 10 ++-
 .../gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c    |  7 +-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c   | 16 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h   | 12 +--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c   | 16 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h   | 13 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c     | 14 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h     | 12 +--
 .../gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.c    | 14 ++-
 .../gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.h    | 13 +--
 .../gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c   | 15 ++--
 .../gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h   | 14 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c   | 17 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h   | 16 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c     | 15 ++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h     | 13 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c       |  8 +-
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h       |  1 -
 drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c        | 90 +++----------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h        | 11 +--
 23 files changed, 127 insertions(+), 247 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
index 86182c734606..e7b680a151d6 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
@@ -4,6 +4,9 @@
  */
 
 #include <linux/delay.h>
+
+#include <drm/drm_managed.h>
+
 #include "dpu_hwio.h"
 #include "dpu_hw_ctl.h"
 #include "dpu_kms.h"
@@ -680,14 +683,15 @@ static void _setup_ctl_ops(struct dpu_hw_ctl_ops *ops,
 		ops->set_active_pipes = dpu_hw_ctl_set_fetch_pipe_active;
 };
 
-struct dpu_hw_ctl *dpu_hw_ctl_init(const struct dpu_ctl_cfg *cfg,
-		void __iomem *addr,
-		u32 mixer_count,
-		const struct dpu_lm_cfg *mixer)
+struct dpu_hw_ctl *dpu_hw_ctl_init(struct drm_device *dev,
+				   const struct dpu_ctl_cfg *cfg,
+				   void __iomem *addr,
+				   u32 mixer_count,
+				   const struct dpu_lm_cfg *mixer)
 {
 	struct dpu_hw_ctl *c;
 
-	c = kzalloc(sizeof(*c), GFP_KERNEL);
+	c = drmm_kzalloc(dev, sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return ERR_PTR(-ENOMEM);
 
@@ -702,8 +706,3 @@ struct dpu_hw_ctl *dpu_hw_ctl_init(const struct dpu_ctl_cfg *cfg,
 
 	return c;
 }
-
-void dpu_hw_ctl_destroy(struct dpu_hw_ctl *ctx)
-{
-	kfree(ctx);
-}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
index 1c242298ff2e..279ebd8dfbff 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
@@ -274,20 +274,16 @@ static inline struct dpu_hw_ctl *to_dpu_hw_ctl(struct dpu_hw_blk *hw)
 /**
  * dpu_hw_ctl_init() - Initializes the ctl_path hw driver object.
  * Should be called before accessing any ctl_path register.
+ * @dev:  Corresponding device for devres management
  * @cfg:  ctl_path catalog entry for which driver object is required
  * @addr: mapped register io address of MDP
  * @mixer_count: Number of mixers in @mixer
  * @mixer: Pointer to an array of Layer Mixers defined in the catalog
  */
-struct dpu_hw_ctl *dpu_hw_ctl_init(const struct dpu_ctl_cfg *cfg,
-		void __iomem *addr,
-		u32 mixer_count,
-		const struct dpu_lm_cfg *mixer);
-
-/**
- * dpu_hw_ctl_destroy(): Destroys ctl driver context
- * should be called to free the context
- */
-void dpu_hw_ctl_destroy(struct dpu_hw_ctl *ctx);
+struct dpu_hw_ctl *dpu_hw_ctl_init(struct drm_device *dev,
+				   const struct dpu_ctl_cfg *cfg,
+				   void __iomem *addr,
+				   u32 mixer_count,
+				   const struct dpu_lm_cfg *mixer);
 
 #endif /*_DPU_HW_CTL_H */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c
index 509dbaa51d87..5e9aad1b2aa2 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c
@@ -3,6 +3,8 @@
  * Copyright (c) 2020-2022, Linaro Limited
  */
 
+#include <drm/drm_managed.h>
+
 #include <drm/display/drm_dsc_helper.h>
 
 #include "dpu_kms.h"
@@ -188,12 +190,13 @@ static void _setup_dsc_ops(struct dpu_hw_dsc_ops *ops,
 		ops->dsc_bind_pingpong_blk = dpu_hw_dsc_bind_pingpong_blk;
 };
 
-struct dpu_hw_dsc *dpu_hw_dsc_init(const struct dpu_dsc_cfg *cfg,
+struct dpu_hw_dsc *dpu_hw_dsc_init(struct drm_device *dev,
+				   const struct dpu_dsc_cfg *cfg,
 				   void __iomem *addr)
 {
 	struct dpu_hw_dsc *c;
 
-	c = kzalloc(sizeof(*c), GFP_KERNEL);
+	c = drmm_kzalloc(dev, sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return ERR_PTR(-ENOMEM);
 
@@ -206,8 +209,3 @@ struct dpu_hw_dsc *dpu_hw_dsc_init(const struct dpu_dsc_cfg *cfg,
 
 	return c;
 }
-
-void dpu_hw_dsc_destroy(struct dpu_hw_dsc *dsc)
-{
-	kfree(dsc);
-}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h
index d5b597ab8c5c..989c88d2449b 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h
@@ -64,20 +64,24 @@ struct dpu_hw_dsc {
 
 /**
  * dpu_hw_dsc_init() - Initializes the DSC hw driver object.
+ * @dev:  Corresponding device for devres management
  * @cfg:  DSC catalog entry for which driver object is required
  * @addr: Mapped register io address of MDP
  * Return: Error code or allocated dpu_hw_dsc context
  */
-struct dpu_hw_dsc *dpu_hw_dsc_init(const struct dpu_dsc_cfg *cfg,
-		void __iomem *addr);
+struct dpu_hw_dsc *dpu_hw_dsc_init(struct drm_device *dev,
+				   const struct dpu_dsc_cfg *cfg,
+				   void __iomem *addr);
 
 /**
  * dpu_hw_dsc_init_1_2() - initializes the v1.2 DSC hw driver object
+ * @dev:  Corresponding device for devres management
  * @cfg:  DSC catalog entry for which driver object is required
  * @addr: Mapped register io address of MDP
  * Returns: Error code or allocated dpu_hw_dsc context
  */
-struct dpu_hw_dsc *dpu_hw_dsc_init_1_2(const struct dpu_dsc_cfg *cfg,
+struct dpu_hw_dsc *dpu_hw_dsc_init_1_2(struct drm_device *dev,
+				       const struct dpu_dsc_cfg *cfg,
 				       void __iomem *addr);
 
 /**
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c
index 24fe1d98eb86..ba193b0376fe 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc_1_2.c
@@ -4,6 +4,8 @@
  * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved
  */
 
+#include <drm/drm_managed.h>
+
 #include <drm/display/drm_dsc_helper.h>
 
 #include "dpu_kms.h"
@@ -367,12 +369,13 @@ static void _setup_dcs_ops_1_2(struct dpu_hw_dsc_ops *ops,
 	ops->dsc_bind_pingpong_blk = dpu_hw_dsc_bind_pingpong_blk_1_2;
 }
 
-struct dpu_hw_dsc *dpu_hw_dsc_init_1_2(const struct dpu_dsc_cfg *cfg,
+struct dpu_hw_dsc *dpu_hw_dsc_init_1_2(struct drm_device *dev,
+				       const struct dpu_dsc_cfg *cfg,
 				       void __iomem *addr)
 {
 	struct dpu_hw_dsc *c;
 
-	c = kzalloc(sizeof(*c), GFP_KERNEL);
+	c = drmm_kzalloc(dev, sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return ERR_PTR(-ENOMEM);
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c
index 9419b2209af8..b1da88e2935f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.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_lm.h"
@@ -68,15 +70,16 @@ static void _setup_dspp_ops(struct dpu_hw_dspp *c,
 		c->ops.setup_pcc = dpu_setup_dspp_pcc;
 }
 
-struct dpu_hw_dspp *dpu_hw_dspp_init(const struct dpu_dspp_cfg *cfg,
-			void __iomem *addr)
+struct dpu_hw_dspp *dpu_hw_dspp_init(struct drm_device *dev,
+				     const struct dpu_dspp_cfg *cfg,
+				     void __iomem *addr)
 {
 	struct dpu_hw_dspp *c;
 
 	if (!addr)
 		return ERR_PTR(-EINVAL);
 
-	c = kzalloc(sizeof(*c), GFP_KERNEL);
+	c = drmm_kzalloc(dev, sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return ERR_PTR(-ENOMEM);
 
@@ -90,10 +93,3 @@ struct dpu_hw_dspp *dpu_hw_dspp_init(const struct dpu_dspp_cfg *cfg,
 
 	return c;
 }
-
-void dpu_hw_dspp_destroy(struct dpu_hw_dspp *dspp)
-{
-	kfree(dspp);
-}
-
-
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h
index bea965681330..3b435690b6cc 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h
@@ -81,18 +81,14 @@ static inline struct dpu_hw_dspp *to_dpu_hw_dspp(struct dpu_hw_blk *hw)
 /**
  * dpu_hw_dspp_init() - Initializes the DSPP hw driver object.
  * should be called once before accessing every DSPP.
+ * @dev:  Corresponding device for devres management
  * @cfg:  DSPP catalog entry for which driver object is required
  * @addr: Mapped register io address of MDP
  * Return: pointer to structure or ERR_PTR
  */
-struct dpu_hw_dspp *dpu_hw_dspp_init(const struct dpu_dspp_cfg *cfg,
-	void __iomem *addr);
-
-/**
- * dpu_hw_dspp_destroy(): Destroys DSPP driver context
- * @dspp: Pointer to DSPP driver context
- */
-void dpu_hw_dspp_destroy(struct dpu_hw_dspp *dspp);
+struct dpu_hw_dspp *dpu_hw_dspp_init(struct drm_device *dev,
+				     const struct dpu_dspp_cfg *cfg,
+				     void __iomem *addr);
 
 #endif /*_DPU_HW_DSPP_H */
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
index e8b8908d3e12..0b6a0a7dcc39 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -12,6 +12,8 @@
 
 #include <linux/iopoll.h>
 
+#include <drm/drm_managed.h>
+
 #define INTF_TIMING_ENGINE_EN           0x000
 #define INTF_CONFIG                     0x004
 #define INTF_HSYNC_CTL                  0x008
@@ -527,8 +529,10 @@ static void dpu_hw_intf_program_intf_cmd_cfg(struct dpu_hw_intf *ctx,
 	DPU_REG_WRITE(&ctx->hw, INTF_CONFIG2, intf_cfg2);
 }
 
-struct dpu_hw_intf *dpu_hw_intf_init(const struct dpu_intf_cfg *cfg,
-		void __iomem *addr, const struct dpu_mdss_version *mdss_rev)
+struct dpu_hw_intf *dpu_hw_intf_init(struct drm_device *dev,
+				     const struct dpu_intf_cfg *cfg,
+				     void __iomem *addr,
+				     const struct dpu_mdss_version *mdss_rev)
 {
 	struct dpu_hw_intf *c;
 
@@ -537,7 +541,7 @@ struct dpu_hw_intf *dpu_hw_intf_init(const struct dpu_intf_cfg *cfg,
 		return NULL;
 	}
 
-	c = kzalloc(sizeof(*c), GFP_KERNEL);
+	c = drmm_kzalloc(dev, sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return ERR_PTR(-ENOMEM);
 
@@ -581,9 +585,3 @@ struct dpu_hw_intf *dpu_hw_intf_init(const struct dpu_intf_cfg *cfg,
 
 	return c;
 }
-
-void dpu_hw_intf_destroy(struct dpu_hw_intf *intf)
-{
-	kfree(intf);
-}
-
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
index c539025c418b..215401bb042e 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
@@ -131,17 +131,14 @@ struct dpu_hw_intf {
 /**
  * dpu_hw_intf_init() - Initializes the INTF driver for the passed
  * interface catalog entry.
+ * @dev:  Corresponding device for devres management
  * @cfg:  interface catalog entry for which driver object is required
  * @addr: mapped register io address of MDP
  * @mdss_rev: dpu core's major and minor versions
  */
-struct dpu_hw_intf *dpu_hw_intf_init(const struct dpu_intf_cfg *cfg,
-		void __iomem *addr, const struct dpu_mdss_version *mdss_rev);
-
-/**
- * dpu_hw_intf_destroy(): Destroys INTF driver context
- * @intf:   Pointer to INTF driver context
- */
-void dpu_hw_intf_destroy(struct dpu_hw_intf *intf);
+struct dpu_hw_intf *dpu_hw_intf_init(struct drm_device *dev,
+				     const struct dpu_intf_cfg *cfg,
+				     void __iomem *addr,
+				     const struct dpu_mdss_version *mdss_rev);
 
 #endif /*_DPU_HW_INTF_H */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
index d1c3bd8379ea..25af52ab602f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
@@ -4,6 +4,8 @@
  * Copyright (c) 2015-2021, The Linux Foundation. All rights reserved.
  */
 
+#include <drm/drm_managed.h>
+
 #include "dpu_kms.h"
 #include "dpu_hw_catalog.h"
 #include "dpu_hwio.h"
@@ -156,8 +158,9 @@ static void _setup_mixer_ops(struct dpu_hw_lm_ops *ops,
 	ops->collect_misr = dpu_hw_lm_collect_misr;
 }
 
-struct dpu_hw_mixer *dpu_hw_lm_init(const struct dpu_lm_cfg *cfg,
-		void __iomem *addr)
+struct dpu_hw_mixer *dpu_hw_lm_init(struct drm_device *dev,
+				    const struct dpu_lm_cfg *cfg,
+				    void __iomem *addr)
 {
 	struct dpu_hw_mixer *c;
 
@@ -166,7 +169,7 @@ struct dpu_hw_mixer *dpu_hw_lm_init(const struct dpu_lm_cfg *cfg,
 		return NULL;
 	}
 
-	c = kzalloc(sizeof(*c), GFP_KERNEL);
+	c = drmm_kzalloc(dev, sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return ERR_PTR(-ENOMEM);
 
@@ -180,8 +183,3 @@ struct dpu_hw_mixer *dpu_hw_lm_init(const struct dpu_lm_cfg *cfg,
 
 	return c;
 }
-
-void dpu_hw_lm_destroy(struct dpu_hw_mixer *lm)
-{
-	kfree(lm);
-}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h
index 36992d046a53..8835fd106413 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h
@@ -95,16 +95,12 @@ static inline struct dpu_hw_mixer *to_dpu_hw_mixer(struct dpu_hw_blk *hw)
 /**
  * dpu_hw_lm_init() - Initializes the mixer hw driver object.
  * should be called once before accessing every mixer.
+ * @dev:  Corresponding device for devres management
  * @cfg:  mixer catalog entry for which driver object is required
  * @addr: mapped register io address of MDP
  */
-struct dpu_hw_mixer *dpu_hw_lm_init(const struct dpu_lm_cfg *cfg,
-		void __iomem *addr);
-
-/**
- * dpu_hw_lm_destroy(): Destroys layer mixer driver context
- * @lm:   Pointer to LM driver context
- */
-void dpu_hw_lm_destroy(struct dpu_hw_mixer *lm);
+struct dpu_hw_mixer *dpu_hw_lm_init(struct drm_device *dev,
+				    const struct dpu_lm_cfg *cfg,
+				    void __iomem *addr);
 
 #endif /*_DPU_HW_LM_H */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.c
index 90e0e05eff8d..ddfa40a959cb 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.c
@@ -4,6 +4,8 @@
 
 #include <linux/iopoll.h>
 
+#include <drm/drm_managed.h>
+
 #include "dpu_hw_mdss.h"
 #include "dpu_hwio.h"
 #include "dpu_hw_catalog.h"
@@ -37,12 +39,13 @@ static void _setup_merge_3d_ops(struct dpu_hw_merge_3d *c,
 	c->ops.setup_3d_mode = dpu_hw_merge_3d_setup_3d_mode;
 };
 
-struct dpu_hw_merge_3d *dpu_hw_merge_3d_init(const struct dpu_merge_3d_cfg *cfg,
-		void __iomem *addr)
+struct dpu_hw_merge_3d *dpu_hw_merge_3d_init(struct drm_device *dev,
+					     const struct dpu_merge_3d_cfg *cfg,
+					     void __iomem *addr)
 {
 	struct dpu_hw_merge_3d *c;
 
-	c = kzalloc(sizeof(*c), GFP_KERNEL);
+	c = drmm_kzalloc(dev, sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return ERR_PTR(-ENOMEM);
 
@@ -55,8 +58,3 @@ struct dpu_hw_merge_3d *dpu_hw_merge_3d_init(const struct dpu_merge_3d_cfg *cfg,
 
 	return c;
 }
-
-void dpu_hw_merge_3d_destroy(struct dpu_hw_merge_3d *hw)
-{
-	kfree(hw);
-}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.h
index 19cec5e88722..c192f02ec1ab 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.h
@@ -48,18 +48,13 @@ static inline struct dpu_hw_merge_3d *to_dpu_hw_merge_3d(struct dpu_hw_blk *hw)
 /**
  * dpu_hw_merge_3d_init() - Initializes the merge_3d driver for the passed
  * merge3d catalog entry.
+ * @dev:  Corresponding device for devres management
  * @cfg:  Pingpong catalog entry for which driver object is required
  * @addr: Mapped register io address of MDP
  * Return: Error code or allocated dpu_hw_merge_3d context
  */
-struct dpu_hw_merge_3d *dpu_hw_merge_3d_init(const struct dpu_merge_3d_cfg *cfg,
-		void __iomem *addr);
-
-/**
- * dpu_hw_merge_3d_destroy - destroys merge_3d driver context
- *	should be called to free the context
- * @pp:   Pointer to PP driver context returned by dpu_hw_merge_3d_init
- */
-void dpu_hw_merge_3d_destroy(struct dpu_hw_merge_3d *pp);
+struct dpu_hw_merge_3d *dpu_hw_merge_3d_init(struct drm_device *dev,
+					     const struct dpu_merge_3d_cfg *cfg,
+					     void __iomem *addr);
 
 #endif /*_DPU_HW_MERGE3D_H */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
index 057cac7f5d93..2db4c6fba37a 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
@@ -4,6 +4,8 @@
 
 #include <linux/iopoll.h>
 
+#include <drm/drm_managed.h>
+
 #include "dpu_hw_mdss.h"
 #include "dpu_hwio.h"
 #include "dpu_hw_catalog.h"
@@ -281,12 +283,14 @@ static int dpu_hw_pp_setup_dsc(struct dpu_hw_pingpong *pp)
 	return 0;
 }
 
-struct dpu_hw_pingpong *dpu_hw_pingpong_init(const struct dpu_pingpong_cfg *cfg,
-		void __iomem *addr, const struct dpu_mdss_version *mdss_rev)
+struct dpu_hw_pingpong *dpu_hw_pingpong_init(struct drm_device *dev,
+					     const struct dpu_pingpong_cfg *cfg,
+					     void __iomem *addr,
+					     const struct dpu_mdss_version *mdss_rev)
 {
 	struct dpu_hw_pingpong *c;
 
-	c = kzalloc(sizeof(*c), GFP_KERNEL);
+	c = drmm_kzalloc(dev, sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return ERR_PTR(-ENOMEM);
 
@@ -317,8 +321,3 @@ struct dpu_hw_pingpong *dpu_hw_pingpong_init(const struct dpu_pingpong_cfg *cfg,
 
 	return c;
 }
-
-void dpu_hw_pingpong_destroy(struct dpu_hw_pingpong *pp)
-{
-	kfree(pp);
-}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
index 0d541ca5b056..a48b69fd79a3 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
@@ -121,19 +121,15 @@ static inline struct dpu_hw_pingpong *to_dpu_hw_pingpong(struct dpu_hw_blk *hw)
 /**
  * dpu_hw_pingpong_init() - initializes the pingpong driver for the passed
  * pingpong catalog entry.
+ * @dev:  Corresponding device for devres management
  * @cfg:  Pingpong catalog entry for which driver object is required
  * @addr: Mapped register io address of MDP
  * @mdss_rev: dpu core's major and minor versions
  * Return: Error code or allocated dpu_hw_pingpong context
  */
-struct dpu_hw_pingpong *dpu_hw_pingpong_init(const struct dpu_pingpong_cfg *cfg,
-		void __iomem *addr, const struct dpu_mdss_version *mdss_rev);
-
-/**
- * dpu_hw_pingpong_destroy - destroys pingpong driver context
- *	should be called to free the context
- * @pp:   Pointer to PP driver context returned by dpu_hw_pingpong_init
- */
-void dpu_hw_pingpong_destroy(struct dpu_hw_pingpong *pp);
+struct dpu_hw_pingpong *dpu_hw_pingpong_init(struct drm_device *dev,
+					     const struct dpu_pingpong_cfg *cfg,
+					     void __iomem *addr,
+					     const struct dpu_mdss_version *mdss_rev);
 
 #endif /*_DPU_HW_PINGPONG_H */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
index 8e3c65989c49..069bf429e520 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
@@ -11,6 +11,7 @@
 #include "msm_mdss.h"
 
 #include <drm/drm_file.h>
+#include <drm/drm_managed.h>
 
 #define DPU_FETCH_CONFIG_RESET_VALUE   0x00000087
 
@@ -685,16 +686,18 @@ int _dpu_hw_sspp_init_debugfs(struct dpu_hw_sspp *hw_pipe, struct dpu_kms *kms,
 }
 #endif
 
-struct dpu_hw_sspp *dpu_hw_sspp_init(const struct dpu_sspp_cfg *cfg,
-		void __iomem *addr, const struct msm_mdss_data *mdss_data,
-		const struct dpu_mdss_version *mdss_rev)
+struct dpu_hw_sspp *dpu_hw_sspp_init(struct drm_device *dev,
+				     const struct dpu_sspp_cfg *cfg,
+				     void __iomem *addr,
+				     const struct msm_mdss_data *mdss_data,
+				     const struct dpu_mdss_version *mdss_rev)
 {
 	struct dpu_hw_sspp *hw_pipe;
 
 	if (!addr)
 		return ERR_PTR(-EINVAL);
 
-	hw_pipe = kzalloc(sizeof(*hw_pipe), GFP_KERNEL);
+	hw_pipe = drmm_kzalloc(dev, sizeof(*hw_pipe), GFP_KERNEL);
 	if (!hw_pipe)
 		return ERR_PTR(-ENOMEM);
 
@@ -709,9 +712,3 @@ struct dpu_hw_sspp *dpu_hw_sspp_init(const struct dpu_sspp_cfg *cfg,
 
 	return hw_pipe;
 }
-
-void dpu_hw_sspp_destroy(struct dpu_hw_sspp *ctx)
-{
-	kfree(ctx);
-}
-
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h
index f93969fddb22..3641ef6bef53 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h
@@ -339,21 +339,17 @@ struct dpu_kms;
 /**
  * dpu_hw_sspp_init() - Initializes the sspp hw driver object.
  * Should be called once before accessing every pipe.
+ * @dev:  Corresponding device for devres management
  * @cfg:  Pipe catalog entry for which driver object is required
  * @addr: Mapped register io address of MDP
  * @mdss_data: UBWC / MDSS configuration data
  * @mdss_rev: dpu core's major and minor versions
  */
-struct dpu_hw_sspp *dpu_hw_sspp_init(const struct dpu_sspp_cfg *cfg,
-		void __iomem *addr, const struct msm_mdss_data *mdss_data,
-		const struct dpu_mdss_version *mdss_rev);
-
-/**
- * dpu_hw_sspp_destroy(): Destroys SSPP driver context
- * should be called during Hw pipe cleanup.
- * @ctx:  Pointer to SSPP driver context returned by dpu_hw_sspp_init
- */
-void dpu_hw_sspp_destroy(struct dpu_hw_sspp *ctx);
+struct dpu_hw_sspp *dpu_hw_sspp_init(struct drm_device *dev,
+				     const struct dpu_sspp_cfg *cfg,
+				     void __iomem *addr,
+				     const struct msm_mdss_data *mdss_data,
+				     const struct dpu_mdss_version *mdss_rev);
 
 int _dpu_hw_sspp_init_debugfs(struct dpu_hw_sspp *hw_pipe, struct dpu_kms *kms,
 			      struct dentry *entry);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
index 9668fb97c047..ed0e80616129 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
@@ -3,6 +3,8 @@
   * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved
   */
 
+#include <drm/drm_managed.h>
+
 #include "dpu_hw_mdss.h"
 #include "dpu_hwio.h"
 #include "dpu_hw_catalog.h"
@@ -208,15 +210,17 @@ static void _setup_wb_ops(struct dpu_hw_wb_ops *ops,
 		ops->setup_clk_force_ctrl = dpu_hw_wb_setup_clk_force_ctrl;
 }
 
-struct dpu_hw_wb *dpu_hw_wb_init(const struct dpu_wb_cfg *cfg,
-		void __iomem *addr, const struct dpu_mdss_version *mdss_rev)
+struct dpu_hw_wb *dpu_hw_wb_init(struct drm_device *dev,
+				 const struct dpu_wb_cfg *cfg,
+				 void __iomem *addr,
+				 const struct dpu_mdss_version *mdss_rev)
 {
 	struct dpu_hw_wb *c;
 
 	if (!addr)
 		return ERR_PTR(-EINVAL);
 
-	c = kzalloc(sizeof(*c), GFP_KERNEL);
+	c = drmm_kzalloc(dev, sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return ERR_PTR(-ENOMEM);
 
@@ -230,8 +234,3 @@ struct dpu_hw_wb *dpu_hw_wb_init(const struct dpu_wb_cfg *cfg,
 
 	return c;
 }
-
-void dpu_hw_wb_destroy(struct dpu_hw_wb *hw_wb)
-{
-	kfree(hw_wb);
-}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h
index 88792f450a92..e671796ea379 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h
@@ -76,18 +76,15 @@ struct dpu_hw_wb {
 
 /**
  * dpu_hw_wb_init() - Initializes the writeback hw driver object.
+ * @dev:  Corresponding device for devres management
  * @cfg:  wb_path catalog entry for which driver object is required
  * @addr: mapped register io address of MDP
  * @mdss_rev: dpu core's major and minor versions
  * Return: Error code or allocated dpu_hw_wb context
  */
-struct dpu_hw_wb *dpu_hw_wb_init(const struct dpu_wb_cfg *cfg,
-		void __iomem *addr, const struct dpu_mdss_version *mdss_rev);
-
-/**
- * dpu_hw_wb_destroy(): Destroy writeback hw driver object.
- * @hw_wb:  Pointer to writeback hw driver object
- */
-void dpu_hw_wb_destroy(struct dpu_hw_wb *hw_wb);
+struct dpu_hw_wb *dpu_hw_wb_init(struct drm_device *dev,
+				 const struct dpu_wb_cfg *cfg,
+				 void __iomem *addr,
+				 const struct dpu_mdss_version *mdss_rev);
 
 #endif /*_DPU_HW_WB_H */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index c675c9a76c74..b911bbe7b094 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -815,10 +815,6 @@ static void _dpu_kms_hw_destroy(struct dpu_kms *dpu_kms)
 		dpu_kms->hw_vbif[i] = NULL;
 	}
 
-	if (dpu_kms->rm_init)
-		dpu_rm_destroy(&dpu_kms->rm);
-	dpu_kms->rm_init = false;
-
 	dpu_kms->catalog = NULL;
 
 	dpu_kms->hw_mdp = NULL;
@@ -1095,14 +1091,12 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 		goto err_pm_put;
 	}
 
-	rc = dpu_rm_init(&dpu_kms->rm, dpu_kms->catalog, dpu_kms->mdss, dpu_kms->mmio);
+	rc = dpu_rm_init(dev, &dpu_kms->rm, dpu_kms->catalog, dpu_kms->mdss, dpu_kms->mmio);
 	if (rc) {
 		DPU_ERROR("rm init failed: %d\n", rc);
 		goto err_pm_put;
 	}
 
-	dpu_kms->rm_init = true;
-
 	dpu_kms->hw_mdp = dpu_hw_mdptop_init(dev,
 					     dpu_kms->catalog->mdp,
 					     dpu_kms->mmio,
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
index b6f53ca6e962..df6271017b80 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
@@ -88,7 +88,6 @@ struct dpu_kms {
 	struct drm_private_obj global_state;
 
 	struct dpu_rm rm;
-	bool rm_init;
 
 	struct dpu_hw_vbif *hw_vbif[VBIF_MAX];
 	struct dpu_hw_mdp *hw_mdp;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
index 8759466e2f37..0bb28cf4a6cb 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
@@ -34,72 +34,8 @@ struct dpu_rm_requirements {
 	struct msm_display_topology topology;
 };
 
-int dpu_rm_destroy(struct dpu_rm *rm)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(rm->dspp_blks); i++) {
-		struct dpu_hw_dspp *hw;
-
-		if (rm->dspp_blks[i]) {
-			hw = to_dpu_hw_dspp(rm->dspp_blks[i]);
-			dpu_hw_dspp_destroy(hw);
-		}
-	}
-	for (i = 0; i < ARRAY_SIZE(rm->pingpong_blks); i++) {
-		struct dpu_hw_pingpong *hw;
-
-		if (rm->pingpong_blks[i]) {
-			hw = to_dpu_hw_pingpong(rm->pingpong_blks[i]);
-			dpu_hw_pingpong_destroy(hw);
-		}
-	}
-	for (i = 0; i < ARRAY_SIZE(rm->merge_3d_blks); i++) {
-		struct dpu_hw_merge_3d *hw;
-
-		if (rm->merge_3d_blks[i]) {
-			hw = to_dpu_hw_merge_3d(rm->merge_3d_blks[i]);
-			dpu_hw_merge_3d_destroy(hw);
-		}
-	}
-	for (i = 0; i < ARRAY_SIZE(rm->mixer_blks); i++) {
-		struct dpu_hw_mixer *hw;
-
-		if (rm->mixer_blks[i]) {
-			hw = to_dpu_hw_mixer(rm->mixer_blks[i]);
-			dpu_hw_lm_destroy(hw);
-		}
-	}
-	for (i = 0; i < ARRAY_SIZE(rm->ctl_blks); i++) {
-		struct dpu_hw_ctl *hw;
-
-		if (rm->ctl_blks[i]) {
-			hw = to_dpu_hw_ctl(rm->ctl_blks[i]);
-			dpu_hw_ctl_destroy(hw);
-		}
-	}
-	for (i = 0; i < ARRAY_SIZE(rm->hw_intf); i++)
-		dpu_hw_intf_destroy(rm->hw_intf[i]);
-
-	for (i = 0; i < ARRAY_SIZE(rm->dsc_blks); i++) {
-		struct dpu_hw_dsc *hw;
-
-		if (rm->dsc_blks[i]) {
-			hw = to_dpu_hw_dsc(rm->dsc_blks[i]);
-			dpu_hw_dsc_destroy(hw);
-		}
-	}
-
-	for (i = 0; i < ARRAY_SIZE(rm->hw_wb); i++)
-		dpu_hw_wb_destroy(rm->hw_wb[i]);
-
-	for (i = 0; i < ARRAY_SIZE(rm->hw_sspp); i++)
-		dpu_hw_sspp_destroy(rm->hw_sspp[i]);
-
-	return 0;
-}
-
-int dpu_rm_init(struct dpu_rm *rm,
+int dpu_rm_init(struct drm_device *dev,
+		struct dpu_rm *rm,
 		const struct dpu_mdss_cfg *cat,
 		const struct msm_mdss_data *mdss_data,
 		void __iomem *mmio)
@@ -119,7 +55,7 @@ int dpu_rm_init(struct dpu_rm *rm,
 		struct dpu_hw_mixer *hw;
 		const struct dpu_lm_cfg *lm = &cat->mixer[i];
 
-		hw = dpu_hw_lm_init(lm, mmio);
+		hw = dpu_hw_lm_init(dev, lm, mmio);
 		if (IS_ERR(hw)) {
 			rc = PTR_ERR(hw);
 			DPU_ERROR("failed lm object creation: err %d\n", rc);
@@ -132,7 +68,7 @@ int dpu_rm_init(struct dpu_rm *rm,
 		struct dpu_hw_merge_3d *hw;
 		const struct dpu_merge_3d_cfg *merge_3d = &cat->merge_3d[i];
 
-		hw = dpu_hw_merge_3d_init(merge_3d, mmio);
+		hw = dpu_hw_merge_3d_init(dev, merge_3d, mmio);
 		if (IS_ERR(hw)) {
 			rc = PTR_ERR(hw);
 			DPU_ERROR("failed merge_3d object creation: err %d\n",
@@ -146,7 +82,7 @@ int dpu_rm_init(struct dpu_rm *rm,
 		struct dpu_hw_pingpong *hw;
 		const struct dpu_pingpong_cfg *pp = &cat->pingpong[i];
 
-		hw = dpu_hw_pingpong_init(pp, mmio, cat->mdss_ver);
+		hw = dpu_hw_pingpong_init(dev, pp, mmio, cat->mdss_ver);
 		if (IS_ERR(hw)) {
 			rc = PTR_ERR(hw);
 			DPU_ERROR("failed pingpong object creation: err %d\n",
@@ -162,7 +98,7 @@ int dpu_rm_init(struct dpu_rm *rm,
 		struct dpu_hw_intf *hw;
 		const struct dpu_intf_cfg *intf = &cat->intf[i];
 
-		hw = dpu_hw_intf_init(intf, mmio, cat->mdss_ver);
+		hw = dpu_hw_intf_init(dev, intf, mmio, cat->mdss_ver);
 		if (IS_ERR(hw)) {
 			rc = PTR_ERR(hw);
 			DPU_ERROR("failed intf object creation: err %d\n", rc);
@@ -175,7 +111,7 @@ int dpu_rm_init(struct dpu_rm *rm,
 		struct dpu_hw_wb *hw;
 		const struct dpu_wb_cfg *wb = &cat->wb[i];
 
-		hw = dpu_hw_wb_init(wb, mmio, cat->mdss_ver);
+		hw = dpu_hw_wb_init(dev, wb, mmio, cat->mdss_ver);
 		if (IS_ERR(hw)) {
 			rc = PTR_ERR(hw);
 			DPU_ERROR("failed wb object creation: err %d\n", rc);
@@ -188,7 +124,7 @@ int dpu_rm_init(struct dpu_rm *rm,
 		struct dpu_hw_ctl *hw;
 		const struct dpu_ctl_cfg *ctl = &cat->ctl[i];
 
-		hw = dpu_hw_ctl_init(ctl, mmio, cat->mixer_count, cat->mixer);
+		hw = dpu_hw_ctl_init(dev, ctl, mmio, cat->mixer_count, cat->mixer);
 		if (IS_ERR(hw)) {
 			rc = PTR_ERR(hw);
 			DPU_ERROR("failed ctl object creation: err %d\n", rc);
@@ -201,7 +137,7 @@ int dpu_rm_init(struct dpu_rm *rm,
 		struct dpu_hw_dspp *hw;
 		const struct dpu_dspp_cfg *dspp = &cat->dspp[i];
 
-		hw = dpu_hw_dspp_init(dspp, mmio);
+		hw = dpu_hw_dspp_init(dev, dspp, mmio);
 		if (IS_ERR(hw)) {
 			rc = PTR_ERR(hw);
 			DPU_ERROR("failed dspp object creation: err %d\n", rc);
@@ -215,9 +151,9 @@ int dpu_rm_init(struct dpu_rm *rm,
 		const struct dpu_dsc_cfg *dsc = &cat->dsc[i];
 
 		if (test_bit(DPU_DSC_HW_REV_1_2, &dsc->features))
-			hw = dpu_hw_dsc_init_1_2(dsc, mmio);
+			hw = dpu_hw_dsc_init_1_2(dev, dsc, mmio);
 		else
-			hw = dpu_hw_dsc_init(dsc, mmio);
+			hw = dpu_hw_dsc_init(dev, dsc, mmio);
 
 		if (IS_ERR(hw)) {
 			rc = PTR_ERR(hw);
@@ -231,7 +167,7 @@ int dpu_rm_init(struct dpu_rm *rm,
 		struct dpu_hw_sspp *hw;
 		const struct dpu_sspp_cfg *sspp = &cat->sspp[i];
 
-		hw = dpu_hw_sspp_init(sspp, mmio, mdss_data, cat->mdss_ver);
+		hw = dpu_hw_sspp_init(dev, sspp, mmio, mdss_data, cat->mdss_ver);
 		if (IS_ERR(hw)) {
 			rc = PTR_ERR(hw);
 			DPU_ERROR("failed sspp object creation: err %d\n", rc);
@@ -243,8 +179,6 @@ int dpu_rm_init(struct dpu_rm *rm,
 	return 0;
 
 fail:
-	dpu_rm_destroy(rm);
-
 	return rc ? rc : -EFAULT;
 }
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h
index 2b551566cbf4..36752d837be4 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h
@@ -38,24 +38,19 @@ struct dpu_rm {
 /**
  * dpu_rm_init - Read hardware catalog and create reservation tracking objects
  *	for all HW blocks.
+ * @dev:  Corresponding device for devres management
  * @rm: DPU Resource Manager handle
  * @cat: Pointer to hardware catalog
  * @mdss_data: Pointer to MDSS / UBWC configuration
  * @mmio: mapped register io address of MDP
  * @Return: 0 on Success otherwise -ERROR
  */
-int dpu_rm_init(struct dpu_rm *rm,
+int dpu_rm_init(struct drm_device *dev,
+		struct dpu_rm *rm,
 		const struct dpu_mdss_cfg *cat,
 		const struct msm_mdss_data *mdss_data,
 		void __iomem *mmio);
 
-/**
- * dpu_rm_destroy - Free all memory allocated by dpu_rm_init
- * @rm: DPU Resource Manager handle
- * @Return: 0 on Success otherwise -ERROR
- */
-int dpu_rm_destroy(struct dpu_rm *rm);
-
 /**
  * dpu_rm_reserve - Given a CRTC->Encoder->Connector display chain, analyze
  *	the use connections and user requirements, specified through related
-- 
2.39.2

[PATCH v4 07/13] drm/msm/dpu: drop unused dpu_plane::lock

[Dmitry Baryshkov]

The field dpu_plane::lock was never used for protecting any kind of
data. Drop it now.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 3eef5e025e12..20908f3d8f81 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -78,8 +78,6 @@ static const uint32_t qcom_compressed_supported_formats[] = {
 struct dpu_plane {
 	struct drm_plane base;
 
-	struct mutex lock;
-
 	enum dpu_sspp pipe;
 
 	uint32_t color_fill;
@@ -1227,8 +1225,6 @@ static void dpu_plane_destroy(struct drm_plane *plane)
 		if (pstate->r_pipe.sspp)
 			_dpu_plane_set_qos_ctrl(plane, &pstate->r_pipe, false);
 
-		mutex_destroy(&pdpu->lock);
-
 		/* this will destroy the states as well */
 		drm_plane_cleanup(plane);
 
@@ -1488,8 +1484,6 @@ struct drm_plane *dpu_plane_init(struct drm_device *dev,
 	/* success! finalize initialization */
 	drm_plane_helper_add(plane, &dpu_plane_helper_funcs);
 
-	mutex_init(&pdpu->lock);
-
 	DPU_DEBUG("%s created for pipe:%u id:%u\n", plane->name,
 					pipe, plane->base.id);
 	return plane;
-- 
2.39.2

[PATCH v4 08/13] drm/msm/dpu: remove QoS teardown on plane destruction

[Dmitry Baryshkov]

There is little point in disabling QoS on plane destruction: it happens
during DPU device destruction process, after which there will be no
running planes.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 20908f3d8f81..ab9f93f15536 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -1214,17 +1214,10 @@ static void dpu_plane_atomic_update(struct drm_plane *plane,
 static void dpu_plane_destroy(struct drm_plane *plane)
 {
 	struct dpu_plane *pdpu = plane ? to_dpu_plane(plane) : NULL;
-	struct dpu_plane_state *pstate;
 
 	DPU_DEBUG_PLANE(pdpu, "\n");
 
 	if (pdpu) {
-		pstate = to_dpu_plane_state(plane->state);
-		_dpu_plane_set_qos_ctrl(plane, &pstate->pipe, false);
-
-		if (pstate->r_pipe.sspp)
-			_dpu_plane_set_qos_ctrl(plane, &pstate->r_pipe, false);
-
 		/* this will destroy the states as well */
 		drm_plane_cleanup(plane);
 
-- 
2.39.2

[PATCH v4 09/13] drm/msm/dpu: use drmm-managed allocation for dpu_plane

[Dmitry Baryshkov]

Change struct dpu_plane allocation to use drmm_universal_plane_alloc().
This removes the need to perform any actions on plane destruction.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 46 +++++------------------
 1 file changed, 10 insertions(+), 36 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index ab9f93f15536..32b4b08ffe35 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -1211,20 +1211,6 @@ static void dpu_plane_atomic_update(struct drm_plane *plane,
 	}
 }
 
-static void dpu_plane_destroy(struct drm_plane *plane)
-{
-	struct dpu_plane *pdpu = plane ? to_dpu_plane(plane) : NULL;
-
-	DPU_DEBUG_PLANE(pdpu, "\n");
-
-	if (pdpu) {
-		/* this will destroy the states as well */
-		drm_plane_cleanup(plane);
-
-		kfree(pdpu);
-	}
-}
-
 static void dpu_plane_destroy_state(struct drm_plane *plane,
 		struct drm_plane_state *state)
 {
@@ -1394,7 +1380,6 @@ static bool dpu_plane_format_mod_supported(struct drm_plane *plane,
 static const struct drm_plane_funcs dpu_plane_funcs = {
 		.update_plane = drm_atomic_helper_update_plane,
 		.disable_plane = drm_atomic_helper_disable_plane,
-		.destroy = dpu_plane_destroy,
 		.reset = dpu_plane_reset,
 		.atomic_duplicate_state = dpu_plane_duplicate_state,
 		.atomic_destroy_state = dpu_plane_destroy_state,
@@ -1422,35 +1407,28 @@ struct drm_plane *dpu_plane_init(struct drm_device *dev,
 	struct dpu_hw_sspp *pipe_hw;
 	uint32_t num_formats;
 	uint32_t supported_rotations;
-	int ret = -EINVAL;
-
-	/* create and zero local structure */
-	pdpu = kzalloc(sizeof(*pdpu), GFP_KERNEL);
-	if (!pdpu) {
-		DPU_ERROR("[%u]failed to allocate local plane struct\n", pipe);
-		ret = -ENOMEM;
-		return ERR_PTR(ret);
-	}
-
-	/* cache local stuff for later */
-	plane = &pdpu->base;
-	pdpu->pipe = pipe;
+	int ret;
 
 	/* initialize underlying h/w driver */
 	pipe_hw = dpu_rm_get_sspp(&kms->rm, pipe);
 	if (!pipe_hw || !pipe_hw->cap || !pipe_hw->cap->sblk) {
 		DPU_ERROR("[%u]SSPP is invalid\n", pipe);
-		goto clean_plane;
+		return ERR_PTR(-EINVAL);
 	}
 
 	format_list = pipe_hw->cap->sblk->format_list;
 	num_formats = pipe_hw->cap->sblk->num_formats;
 
-	ret = drm_universal_plane_init(dev, plane, 0xff, &dpu_plane_funcs,
+	pdpu = drmm_universal_plane_alloc(dev, struct dpu_plane, base,
+				0xff, &dpu_plane_funcs,
 				format_list, num_formats,
 				supported_format_modifiers, type, NULL);
-	if (ret)
-		goto clean_plane;
+	if (IS_ERR(pdpu))
+		return ERR_CAST(pdpu);
+
+	/* cache local stuff for later */
+	plane = &pdpu->base;
+	pdpu->pipe = pipe;
 
 	pdpu->catalog = kms->catalog;
 
@@ -1480,8 +1458,4 @@ struct drm_plane *dpu_plane_init(struct drm_device *dev,
 	DPU_DEBUG("%s created for pipe:%u id:%u\n", plane->name,
 					pipe, plane->base.id);
 	return plane;
-
-clean_plane:
-	kfree(pdpu);
-	return ERR_PTR(ret);
 }
-- 
2.39.2

[PATCH v4 10/13] drm/msm/dpu: use drmm-managed allocation for dpu_crtc

[Dmitry Baryshkov]

Change struct dpu_crtc allocation to use drmm_crtc_alloc_with_planes().
This removes the need to perform any actions on CRTC destruction.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 25 +++++++-----------------
 1 file changed, 7 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 3c475f8042b0..a798c10036e1 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -51,17 +51,6 @@ static struct dpu_kms *_dpu_crtc_get_kms(struct drm_crtc *crtc)
 	return to_dpu_kms(priv->kms);
 }
 
-static void dpu_crtc_destroy(struct drm_crtc *crtc)
-{
-	struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
-
-	if (!crtc)
-		return;
-
-	drm_crtc_cleanup(crtc);
-	kfree(dpu_crtc);
-}
-
 static struct drm_encoder *get_encoder_from_crtc(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
@@ -1435,7 +1424,6 @@ static int dpu_crtc_late_register(struct drm_crtc *crtc)
 
 static const struct drm_crtc_funcs dpu_crtc_funcs = {
 	.set_config = drm_atomic_helper_set_config,
-	.destroy = dpu_crtc_destroy,
 	.page_flip = drm_atomic_helper_page_flip,
 	.reset = dpu_crtc_reset,
 	.atomic_duplicate_state = dpu_crtc_duplicate_state,
@@ -1469,9 +1457,13 @@ struct drm_crtc *dpu_crtc_init(struct drm_device *dev, struct drm_plane *plane,
 	struct dpu_crtc *dpu_crtc;
 	int i, ret;
 
-	dpu_crtc = kzalloc(sizeof(*dpu_crtc), GFP_KERNEL);
-	if (!dpu_crtc)
-		return ERR_PTR(-ENOMEM);
+	dpu_crtc = drmm_crtc_alloc_with_planes(dev, struct dpu_crtc, base,
+					       plane, cursor,
+					       &dpu_crtc_funcs,
+					       NULL);
+
+	if (IS_ERR(dpu_crtc))
+		return ERR_CAST(dpu_crtc);
 
 	crtc = &dpu_crtc->base;
 	crtc->dev = dev;
@@ -1491,9 +1483,6 @@ struct drm_crtc *dpu_crtc_init(struct drm_device *dev, struct drm_plane *plane,
 				dpu_crtc_frame_event_work);
 	}
 
-	drm_crtc_init_with_planes(dev, crtc, plane, cursor, &dpu_crtc_funcs,
-				NULL);
-
 	drm_crtc_helper_add(crtc, &dpu_crtc_helper_funcs);
 
 	if (dpu_kms->catalog->dspp_count)
-- 
2.39.2

[PATCH v4 11/13] drm/msm/dpu: use drmm-managed allocation for dpu_encoder_phys

[Dmitry Baryshkov]

Change struct allocation of encoder's phys backend data to use
drmm_kzalloc(). This removes the need to perform any actions on encoder
destruction.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c   |  9 ++++----
 .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h  |  8 ++++---
 .../drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c  | 15 ++++---------
 .../drm/msm/disp/dpu1/dpu_encoder_phys_vid.c  | 13 ++++--------
 .../drm/msm/disp/dpu1/dpu_encoder_phys_wb.c   | 21 ++++---------------
 5 files changed, 22 insertions(+), 44 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 1cf7ff6caff4..fdbaa92ec1ad 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -2173,6 +2173,7 @@ static void dpu_encoder_early_unregister(struct drm_encoder *encoder)
 }
 
 static int dpu_encoder_virt_add_phys_encs(
+		struct drm_device *dev,
 		struct msm_display_info *disp_info,
 		struct dpu_encoder_virt *dpu_enc,
 		struct dpu_enc_phys_init_params *params)
@@ -2194,7 +2195,7 @@ static int dpu_encoder_virt_add_phys_encs(
 
 
 	if (disp_info->intf_type == INTF_WB) {
-		enc = dpu_encoder_phys_wb_init(params);
+		enc = dpu_encoder_phys_wb_init(dev, params);
 
 		if (IS_ERR(enc)) {
 			DPU_ERROR_ENC(dpu_enc, "failed to init wb enc: %ld\n",
@@ -2205,7 +2206,7 @@ static int dpu_encoder_virt_add_phys_encs(
 		dpu_enc->phys_encs[dpu_enc->num_phys_encs] = enc;
 		++dpu_enc->num_phys_encs;
 	} else if (disp_info->is_cmd_mode) {
-		enc = dpu_encoder_phys_cmd_init(params);
+		enc = dpu_encoder_phys_cmd_init(dev, params);
 
 		if (IS_ERR(enc)) {
 			DPU_ERROR_ENC(dpu_enc, "failed to init cmd enc: %ld\n",
@@ -2216,7 +2217,7 @@ static int dpu_encoder_virt_add_phys_encs(
 		dpu_enc->phys_encs[dpu_enc->num_phys_encs] = enc;
 		++dpu_enc->num_phys_encs;
 	} else {
-		enc = dpu_encoder_phys_vid_init(params);
+		enc = dpu_encoder_phys_vid_init(dev, params);
 
 		if (IS_ERR(enc)) {
 			DPU_ERROR_ENC(dpu_enc, "failed to init vid enc: %ld\n",
@@ -2305,7 +2306,7 @@ static int dpu_encoder_setup_display(struct dpu_encoder_virt *dpu_enc,
 			break;
 		}
 
-		ret = dpu_encoder_virt_add_phys_encs(disp_info,
+		ret = dpu_encoder_virt_add_phys_encs(dpu_kms->dev, disp_info,
 				dpu_enc, &phys_params);
 		if (ret) {
 			DPU_ERROR_ENC(dpu_enc, "failed to add phys encs\n");
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
index 6f04c3d56e77..5dc53b65040e 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
@@ -281,22 +281,24 @@ struct dpu_encoder_wait_info {
  * @p:	Pointer to init params structure
  * Return: Error code or newly allocated encoder
  */
-struct dpu_encoder_phys *dpu_encoder_phys_vid_init(
+struct dpu_encoder_phys *dpu_encoder_phys_vid_init(struct drm_device *dev,
 		struct dpu_enc_phys_init_params *p);
 
 /**
  * dpu_encoder_phys_cmd_init - Construct a new command mode physical encoder
+ * @dev:  Corresponding device for devres management
  * @p:	Pointer to init params structure
  * Return: Error code or newly allocated encoder
  */
-struct dpu_encoder_phys *dpu_encoder_phys_cmd_init(
+struct dpu_encoder_phys *dpu_encoder_phys_cmd_init(struct drm_device *dev,
 		struct dpu_enc_phys_init_params *p);
 
 /**
  * dpu_encoder_phys_wb_init - initialize writeback encoder
+ * @dev:  Corresponding device for devres management
  * @init:	Pointer to init info structure with initialization params
  */
-struct dpu_encoder_phys *dpu_encoder_phys_wb_init(
+struct dpu_encoder_phys *dpu_encoder_phys_wb_init(struct drm_device *dev,
 		struct dpu_enc_phys_init_params *p);
 
 /**
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
index be185fe69793..d24f45d1f654 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
@@ -13,6 +13,8 @@
 #include "dpu_trace.h"
 #include "disp/msm_disp_snapshot.h"
 
+#include <drm/drm_managed.h>
+
 #define DPU_DEBUG_CMDENC(e, fmt, ...) DPU_DEBUG("enc%d intf%d " fmt, \
 		(e) && (e)->base.parent ? \
 		(e)->base.parent->base.id : -1, \
@@ -558,14 +560,6 @@ static void dpu_encoder_phys_cmd_disable(struct dpu_encoder_phys *phys_enc)
 	phys_enc->enable_state = DPU_ENC_DISABLED;
 }
 
-static void dpu_encoder_phys_cmd_destroy(struct dpu_encoder_phys *phys_enc)
-{
-	struct dpu_encoder_phys_cmd *cmd_enc =
-		to_dpu_encoder_phys_cmd(phys_enc);
-
-	kfree(cmd_enc);
-}
-
 static void dpu_encoder_phys_cmd_prepare_for_kickoff(
 		struct dpu_encoder_phys *phys_enc)
 {
@@ -731,7 +725,6 @@ static void dpu_encoder_phys_cmd_init_ops(
 	ops->atomic_mode_set = dpu_encoder_phys_cmd_atomic_mode_set;
 	ops->enable = dpu_encoder_phys_cmd_enable;
 	ops->disable = dpu_encoder_phys_cmd_disable;
-	ops->destroy = dpu_encoder_phys_cmd_destroy;
 	ops->control_vblank_irq = dpu_encoder_phys_cmd_control_vblank_irq;
 	ops->wait_for_commit_done = dpu_encoder_phys_cmd_wait_for_commit_done;
 	ops->prepare_for_kickoff = dpu_encoder_phys_cmd_prepare_for_kickoff;
@@ -746,7 +739,7 @@ static void dpu_encoder_phys_cmd_init_ops(
 	ops->get_line_count = dpu_encoder_phys_cmd_get_line_count;
 }
 
-struct dpu_encoder_phys *dpu_encoder_phys_cmd_init(
+struct dpu_encoder_phys *dpu_encoder_phys_cmd_init(struct drm_device *dev,
 		struct dpu_enc_phys_init_params *p)
 {
 	struct dpu_encoder_phys *phys_enc = NULL;
@@ -754,7 +747,7 @@ struct dpu_encoder_phys *dpu_encoder_phys_cmd_init(
 
 	DPU_DEBUG("intf\n");
 
-	cmd_enc = kzalloc(sizeof(*cmd_enc), GFP_KERNEL);
+	cmd_enc = drmm_kzalloc(dev, sizeof(*cmd_enc), GFP_KERNEL);
 	if (!cmd_enc) {
 		DPU_ERROR("failed to allocate\n");
 		return ERR_PTR(-ENOMEM);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
index a01fda711883..69bc1b2e514c 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
@@ -11,6 +11,8 @@
 #include "dpu_trace.h"
 #include "disp/msm_disp_snapshot.h"
 
+#include <drm/drm_managed.h>
+
 #define DPU_DEBUG_VIDENC(e, fmt, ...) DPU_DEBUG("enc%d intf%d " fmt, \
 		(e) && (e)->parent ? \
 		(e)->parent->base.id : -1, \
@@ -438,12 +440,6 @@ static void dpu_encoder_phys_vid_enable(struct dpu_encoder_phys *phys_enc)
 		phys_enc->enable_state = DPU_ENC_ENABLING;
 }
 
-static void dpu_encoder_phys_vid_destroy(struct dpu_encoder_phys *phys_enc)
-{
-	DPU_DEBUG_VIDENC(phys_enc, "\n");
-	kfree(phys_enc);
-}
-
 static int dpu_encoder_phys_vid_wait_for_vblank(
 		struct dpu_encoder_phys *phys_enc)
 {
@@ -681,7 +677,6 @@ static void dpu_encoder_phys_vid_init_ops(struct dpu_encoder_phys_ops *ops)
 	ops->atomic_mode_set = dpu_encoder_phys_vid_atomic_mode_set;
 	ops->enable = dpu_encoder_phys_vid_enable;
 	ops->disable = dpu_encoder_phys_vid_disable;
-	ops->destroy = dpu_encoder_phys_vid_destroy;
 	ops->control_vblank_irq = dpu_encoder_phys_vid_control_vblank_irq;
 	ops->wait_for_commit_done = dpu_encoder_phys_vid_wait_for_commit_done;
 	ops->wait_for_vblank = dpu_encoder_phys_vid_wait_for_vblank;
@@ -694,7 +689,7 @@ static void dpu_encoder_phys_vid_init_ops(struct dpu_encoder_phys_ops *ops)
 	ops->get_frame_count = dpu_encoder_phys_vid_get_frame_count;
 }
 
-struct dpu_encoder_phys *dpu_encoder_phys_vid_init(
+struct dpu_encoder_phys *dpu_encoder_phys_vid_init(struct drm_device *dev,
 		struct dpu_enc_phys_init_params *p)
 {
 	struct dpu_encoder_phys *phys_enc = NULL;
@@ -704,7 +699,7 @@ struct dpu_encoder_phys *dpu_encoder_phys_vid_init(
 		return ERR_PTR(-EINVAL);
 	}
 
-	phys_enc = kzalloc(sizeof(*phys_enc), GFP_KERNEL);
+	phys_enc = drmm_kzalloc(dev, sizeof(*phys_enc), GFP_KERNEL);
 	if (!phys_enc) {
 		DPU_ERROR("failed to create encoder due to memory allocation error\n");
 		return ERR_PTR(-ENOMEM);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
index 0b6a761d68b7..bb94909caa25 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
@@ -8,6 +8,7 @@
 #include <linux/debugfs.h>
 
 #include <drm/drm_framebuffer.h>
+#include <drm/drm_managed.h>
 
 #include "dpu_encoder_phys.h"
 #include "dpu_formats.h"
@@ -580,20 +581,6 @@ static void dpu_encoder_phys_wb_disable(struct dpu_encoder_phys *phys_enc)
 	phys_enc->enable_state = DPU_ENC_DISABLED;
 }
 
-/**
- * dpu_encoder_phys_wb_destroy - destroy writeback encoder
- * @phys_enc:	Pointer to physical encoder
- */
-static void dpu_encoder_phys_wb_destroy(struct dpu_encoder_phys *phys_enc)
-{
-	if (!phys_enc)
-		return;
-
-	DPU_DEBUG("[wb:%d]\n", phys_enc->hw_wb->idx - WB_0);
-
-	kfree(phys_enc);
-}
-
 static void dpu_encoder_phys_wb_prepare_wb_job(struct dpu_encoder_phys *phys_enc,
 		struct drm_writeback_job *job)
 {
@@ -689,7 +676,6 @@ static void dpu_encoder_phys_wb_init_ops(struct dpu_encoder_phys_ops *ops)
 	ops->atomic_mode_set = dpu_encoder_phys_wb_atomic_mode_set;
 	ops->enable = dpu_encoder_phys_wb_enable;
 	ops->disable = dpu_encoder_phys_wb_disable;
-	ops->destroy = dpu_encoder_phys_wb_destroy;
 	ops->atomic_check = dpu_encoder_phys_wb_atomic_check;
 	ops->wait_for_commit_done = dpu_encoder_phys_wb_wait_for_commit_done;
 	ops->prepare_for_kickoff = dpu_encoder_phys_wb_prepare_for_kickoff;
@@ -705,9 +691,10 @@ static void dpu_encoder_phys_wb_init_ops(struct dpu_encoder_phys_ops *ops)
 
 /**
  * dpu_encoder_phys_wb_init - initialize writeback encoder
+ * @dev:  Corresponding device for devres management
  * @p:	Pointer to init info structure with initialization params
  */
-struct dpu_encoder_phys *dpu_encoder_phys_wb_init(
+struct dpu_encoder_phys *dpu_encoder_phys_wb_init(struct drm_device *dev,
 		struct dpu_enc_phys_init_params *p)
 {
 	struct dpu_encoder_phys *phys_enc = NULL;
@@ -720,7 +707,7 @@ struct dpu_encoder_phys *dpu_encoder_phys_wb_init(
 		return ERR_PTR(-EINVAL);
 	}
 
-	wb_enc = kzalloc(sizeof(*wb_enc), GFP_KERNEL);
+	wb_enc = drmm_kzalloc(dev, sizeof(*wb_enc), GFP_KERNEL);
 	if (!wb_enc) {
 		DPU_ERROR("failed to allocate wb phys_enc enc\n");
 		return ERR_PTR(-ENOMEM);
-- 
2.39.2

[PATCH v4 12/13] drm/msm/dpu: drop dpu_encoder_phys_ops::destroy

[Dmitry Baryshkov]

Drop the dpu_encoder_phys_ops' destroy() callback. No phys backend
implements it anymore, so it is useless.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c    | 18 ------------------
 .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h   |  2 --
 2 files changed, 20 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index fdbaa92ec1ad..0dc74e315a9f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -452,24 +452,6 @@ static void dpu_encoder_destroy(struct drm_encoder *drm_enc)
 	dpu_enc = to_dpu_encoder_virt(drm_enc);
 	DPU_DEBUG_ENC(dpu_enc, "\n");
 
-	mutex_lock(&dpu_enc->enc_lock);
-
-	for (i = 0; i < dpu_enc->num_phys_encs; i++) {
-		struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
-
-		if (phys->ops.destroy) {
-			phys->ops.destroy(phys);
-			--dpu_enc->num_phys_encs;
-			dpu_enc->phys_encs[i] = NULL;
-		}
-	}
-
-	if (dpu_enc->num_phys_encs)
-		DPU_ERROR_ENC(dpu_enc, "expected 0 num_phys_encs not %d\n",
-				dpu_enc->num_phys_encs);
-	dpu_enc->num_phys_encs = 0;
-	mutex_unlock(&dpu_enc->enc_lock);
-
 	drm_encoder_cleanup(drm_enc);
 	mutex_destroy(&dpu_enc->enc_lock);
 }
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
index 5dc53b65040e..b6b48e2c63ef 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
@@ -72,7 +72,6 @@ struct dpu_encoder_phys;
  * @enable:			DRM Call. Enable a DRM mode.
  * @disable:			DRM Call. Disable mode.
  * @atomic_check:		DRM Call. Atomic check new DRM state.
- * @destroy:			DRM Call. Destroy and release resources.
  * @control_vblank_irq		Register/Deregister for VBLANK IRQ
  * @wait_for_commit_done:	Wait for hardware to have flushed the
  *				current pending frames to hardware
@@ -102,7 +101,6 @@ struct dpu_encoder_phys_ops {
 	int (*atomic_check)(struct dpu_encoder_phys *encoder,
 			    struct drm_crtc_state *crtc_state,
 			    struct drm_connector_state *conn_state);
-	void (*destroy)(struct dpu_encoder_phys *encoder);
 	int (*control_vblank_irq)(struct dpu_encoder_phys *enc, bool enable);
 	int (*wait_for_commit_done)(struct dpu_encoder_phys *phys_enc);
 	int (*wait_for_tx_complete)(struct dpu_encoder_phys *phys_enc);
-- 
2.39.2

[PATCH v4 13/13] drm/msm/dpu: use drmm-managed allocation for dpu_encoder_virt

[Dmitry Baryshkov]

It is incorrect to use devm-managed memory allocations for DRM data
structures exposed to userspace. They should use drmm_ allocations.
Change struct dpu_encoder allocation to use drmm_encoder_alloc(). This
removes the need to perform any actions on encoder destruction.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 50 +++++----------------
 1 file changed, 10 insertions(+), 40 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 0dc74e315a9f..3383ab708ec4 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -439,23 +439,6 @@ int dpu_encoder_get_linecount(struct drm_encoder *drm_enc)
 	return linecount;
 }
 
-static void dpu_encoder_destroy(struct drm_encoder *drm_enc)
-{
-	struct dpu_encoder_virt *dpu_enc = NULL;
-	int i = 0;
-
-	if (!drm_enc) {
-		DPU_ERROR("invalid encoder\n");
-		return;
-	}
-
-	dpu_enc = to_dpu_encoder_virt(drm_enc);
-	DPU_DEBUG_ENC(dpu_enc, "\n");
-
-	drm_encoder_cleanup(drm_enc);
-	mutex_destroy(&dpu_enc->enc_lock);
-}
-
 void dpu_encoder_helper_split_config(
 		struct dpu_encoder_phys *phys_enc,
 		enum dpu_intf interface)
@@ -2337,7 +2320,6 @@ static const struct drm_encoder_helper_funcs dpu_encoder_helper_funcs = {
 };
 
 static const struct drm_encoder_funcs dpu_encoder_funcs = {
-		.destroy = dpu_encoder_destroy,
 		.late_register = dpu_encoder_late_register,
 		.early_unregister = dpu_encoder_early_unregister,
 };
@@ -2348,20 +2330,13 @@ struct drm_encoder *dpu_encoder_init(struct drm_device *dev,
 {
 	struct msm_drm_private *priv = dev->dev_private;
 	struct dpu_kms *dpu_kms = to_dpu_kms(priv->kms);
-	struct drm_encoder *drm_enc = NULL;
-	struct dpu_encoder_virt *dpu_enc = NULL;
-	int ret = 0;
+	struct dpu_encoder_virt *dpu_enc;
+	int ret;
 
-	dpu_enc = devm_kzalloc(dev->dev, sizeof(*dpu_enc), GFP_KERNEL);
-	if (!dpu_enc)
-		return ERR_PTR(-ENOMEM);
-
-	ret = drm_encoder_init(dev, &dpu_enc->base, &dpu_encoder_funcs,
-			       drm_enc_mode, NULL);
-	if (ret) {
-		devm_kfree(dev->dev, dpu_enc);
-		return ERR_PTR(ret);
-	}
+	dpu_enc = drmm_encoder_alloc(dev, struct dpu_encoder_virt, base,
+				     &dpu_encoder_funcs, drm_enc_mode, NULL);
+	if (IS_ERR(dpu_enc))
+		return ERR_CAST(dpu_enc);
 
 	drm_encoder_helper_add(&dpu_enc->base, &dpu_encoder_helper_funcs);
 
@@ -2371,8 +2346,10 @@ struct drm_encoder *dpu_encoder_init(struct drm_device *dev,
 	mutex_init(&dpu_enc->rc_lock);
 
 	ret = dpu_encoder_setup_display(dpu_enc, dpu_kms, disp_info);
-	if (ret)
-		goto fail;
+	if (ret) {
+		DPU_ERROR("failed to setup encoder\n");
+		return ERR_PTR(-ENOMEM);
+	}
 
 	atomic_set(&dpu_enc->frame_done_timeout_ms, 0);
 	timer_setup(&dpu_enc->frame_done_timer,
@@ -2387,13 +2364,6 @@ struct drm_encoder *dpu_encoder_init(struct drm_device *dev,
 	DPU_DEBUG_ENC(dpu_enc, "created\n");
 
 	return &dpu_enc->base;
-
-fail:
-	DPU_ERROR("failed to create encoder\n");
-	if (drm_enc)
-		dpu_encoder_destroy(drm_enc);
-
-	return ERR_PTR(ret);
 }
 
 int dpu_encoder_wait_for_event(struct drm_encoder *drm_enc,
-- 
2.39.2

Re: [PATCH v4 00/13] drm/msm/dpu: use managed memory allocations

[Dmitry Baryshkov]

On Sat, 02 Dec 2023 00:18:32 +0300, Dmitry Baryshkov wrote:
> In a lots of places in DPU driver memory is allocated by using the
> kzalloc and then manually freed using kfree. However thes memory chunks
> have a well-defined life cycle. They are either a part of the driver's
> runtime and can be devm_kzalloc'ed or are exposed to userspace via the
> DRM objects and thus can be drmm_alloc'ed. Implement corresponding
> runtime resource manangement for the DPU driver.
> 
> [...]

Applied, thanks!

[01/13] drm/msm/dpu: cleanup dpu_kms_hw_init error path
        https://gitlab.freedesktop.org/lumag/msm/-/commit/134c78c96227
[02/13] drm/msm/dpu: remove IS_ERR_OR_NULL for dpu_hw_intr_init() error handling
        https://gitlab.freedesktop.org/lumag/msm/-/commit/b830b06f0087
[03/13] drm/msm/dpu: use devres-managed allocation for interrupts data
        https://gitlab.freedesktop.org/lumag/msm/-/commit/b19e6f7dd2e7
[04/13] drm/msm/dpu: use devres-managed allocation for VBIF data
        https://gitlab.freedesktop.org/lumag/msm/-/commit/bdfa47d9b17a
[05/13] drm/msm/dpu: use devres-managed allocation for MDP TOP
        https://gitlab.freedesktop.org/lumag/msm/-/commit/1e897dcc4c67
[06/13] drm/msm/dpu: use devres-managed allocation for HW blocks
        https://gitlab.freedesktop.org/lumag/msm/-/commit/a106ed98af68
[07/13] drm/msm/dpu: drop unused dpu_plane::lock
        https://gitlab.freedesktop.org/lumag/msm/-/commit/b0311c1c4e06
[08/13] drm/msm/dpu: remove QoS teardown on plane destruction
        https://gitlab.freedesktop.org/lumag/msm/-/commit/bcc54a4c063a
[09/13] drm/msm/dpu: use drmm-managed allocation for dpu_plane
        https://gitlab.freedesktop.org/lumag/msm/-/commit/0e00f9af95bb
[10/13] drm/msm/dpu: use drmm-managed allocation for dpu_crtc
        https://gitlab.freedesktop.org/lumag/msm/-/commit/3637af92de2b
[11/13] drm/msm/dpu: use drmm-managed allocation for dpu_encoder_phys
        https://gitlab.freedesktop.org/lumag/msm/-/commit/73169b45e1ed
[12/13] drm/msm/dpu: drop dpu_encoder_phys_ops::destroy
        https://gitlab.freedesktop.org/lumag/msm/-/commit/3285f4acb23c
[13/13] drm/msm/dpu: use drmm-managed allocation for dpu_encoder_virt
        https://gitlab.freedesktop.org/lumag/msm/-/commit/cd42c56d9c0b

Best regards,
-- 
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>