[06/11] drm/msm/dpu: Cleanup callers of dpu_hw_blk_init

Commit Message

Jordan Crouse Nov. 5, 2018, 11:30 p.m. UTC

Outside of superfluous parameter checks the dpu_hw_blk_init()
doesn't have any failure paths. Switch it over to be a void
function and we can remove error handling paths in all the functions
that call it. While we're in those functions remove unneeded
initialization for a static variable.

v2: Removed a cleanup intended for a different patch

Signed-off-by: Jordan Crouse <[e-mail]>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c      | 10 +---------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.h      |  2 +-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c      | 17 ++---------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c     | 17 ++---------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c       | 17 ++---------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c | 17 ++---------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c     | 17 ++---------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c      | 17 ++---------------
 8 files changed, 14 insertions(+), 100 deletions(-)

Comments

Sean Paul Nov. 6, 2018, 2:45 p.m. UTC | #1

On Mon, Nov 05, 2018 at 04:30:58PM -0700, Jordan Crouse wrote:
> Outside of superfluous parameter checks the dpu_hw_blk_init()
> doesn't have any failure paths. Switch it over to be a void
> function and we can remove error handling paths in all the functions
> that call it. While we're in those functions remove unneeded
> initialization for a static variable.
> 
> v2: Removed a cleanup intended for a different patch
> 
> Signed-off-by: Jordan Crouse <[e-mail]>

Reviewed-by: Sean Paul <[e-mail]>

> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c      | 10 +---------
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.h      |  2 +-
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c      | 17 ++---------------
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c     | 17 ++---------------
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c       | 17 ++---------------
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c | 17 ++---------------
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c     | 17 ++---------------
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c      | 17 ++---------------
>  8 files changed, 14 insertions(+), 100 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c
> index 58d29e43faef..92f1c4241b9a 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c
> @@ -30,16 +30,10 @@ static LIST_HEAD(dpu_hw_blk_list);
>   * @type: hw block type - enum dpu_hw_blk_type
>   * @id: instance id of the hw block
>   * @ops: Pointer to block operations
> - * return: 0 if success; error code otherwise
>   */
> -int dpu_hw_blk_init(struct dpu_hw_blk *hw_blk, u32 type, int id,
> +void dpu_hw_blk_init(struct dpu_hw_blk *hw_blk, u32 type, int id,
>  		struct dpu_hw_blk_ops *ops)
>  {
> -	if (!hw_blk) {
> -		pr_err("invalid parameters\n");
> -		return -EINVAL;
> -	}
> -
>  	INIT_LIST_HEAD(&hw_blk->list);
>  	hw_blk->type = type;
>  	hw_blk->id = id;
> @@ -51,8 +45,6 @@ int dpu_hw_blk_init(struct dpu_hw_blk *hw_blk, u32 type, int id,
>  	mutex_lock(&dpu_hw_blk_lock);
>  	list_add(&hw_blk->list, &dpu_hw_blk_list);
>  	mutex_unlock(&dpu_hw_blk_lock);
> -
> -	return 0;
>  }
>  
>  /**
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.h
> index 0f4ca8af1ec5..1934c2f7e8fa 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.h
> @@ -44,7 +44,7 @@ struct dpu_hw_blk {
>  	struct dpu_hw_blk_ops ops;
>  };
>  
> -int dpu_hw_blk_init(struct dpu_hw_blk *hw_blk, u32 type, int id,
> +void dpu_hw_blk_init(struct dpu_hw_blk *hw_blk, u32 type, int id,
>  		struct dpu_hw_blk_ops *ops);
>  void dpu_hw_blk_destroy(struct dpu_hw_blk *hw_blk);
>  
> 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 4aab04335c6d..1068b4b7940f 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
> @@ -483,10 +483,7 @@ static void _setup_ctl_ops(struct dpu_hw_ctl_ops *ops,
>  	ops->get_bitmask_intf = dpu_hw_ctl_get_bitmask_intf;
>  };
>  
> -static struct dpu_hw_blk_ops dpu_hw_ops = {
> -	.start = NULL,
> -	.stop = NULL,
> -};
> +static struct dpu_hw_blk_ops dpu_hw_ops;
>  
>  struct dpu_hw_ctl *dpu_hw_ctl_init(enum dpu_ctl idx,
>  		void __iomem *addr,
> @@ -494,7 +491,6 @@ struct dpu_hw_ctl *dpu_hw_ctl_init(enum dpu_ctl idx,
>  {
>  	struct dpu_hw_ctl *c;
>  	struct dpu_ctl_cfg *cfg;
> -	int rc;
>  
>  	c = kzalloc(sizeof(*c), GFP_KERNEL);
>  	if (!c)
> @@ -513,18 +509,9 @@ struct dpu_hw_ctl *dpu_hw_ctl_init(enum dpu_ctl idx,
>  	c->mixer_count = m->mixer_count;
>  	c->mixer_hw_caps = m->mixer;
>  
> -	rc = dpu_hw_blk_init(&c->base, DPU_HW_BLK_CTL, idx, &dpu_hw_ops);
> -	if (rc) {
> -		DPU_ERROR("failed to init hw blk %d\n", rc);
> -		goto blk_init_error;
> -	}
> +	dpu_hw_blk_init(&c->base, DPU_HW_BLK_CTL, idx, &dpu_hw_ops);
>  
>  	return c;
> -
> -blk_init_error:
> -	kzfree(c);
> -
> -	return ERR_PTR(rc);
>  }
>  
>  void dpu_hw_ctl_destroy(struct dpu_hw_ctl *ctx)
> 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 695d27a730e8..f6a83daa385b 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
> @@ -264,10 +264,7 @@ static void _setup_intf_ops(struct dpu_hw_intf_ops *ops,
>  	ops->get_line_count = dpu_hw_intf_get_line_count;
>  }
>  
> -static struct dpu_hw_blk_ops dpu_hw_ops = {
> -	.start = NULL,
> -	.stop = NULL,
> -};
> +static struct dpu_hw_blk_ops dpu_hw_ops;
>  
>  struct dpu_hw_intf *dpu_hw_intf_init(enum dpu_intf idx,
>  		void __iomem *addr,
> @@ -275,7 +272,6 @@ struct dpu_hw_intf *dpu_hw_intf_init(enum dpu_intf idx,
>  {
>  	struct dpu_hw_intf *c;
>  	struct dpu_intf_cfg *cfg;
> -	int rc;
>  
>  	c = kzalloc(sizeof(*c), GFP_KERNEL);
>  	if (!c)
> @@ -296,18 +292,9 @@ struct dpu_hw_intf *dpu_hw_intf_init(enum dpu_intf idx,
>  	c->mdss = m;
>  	_setup_intf_ops(&c->ops, c->cap->features);
>  
> -	rc = dpu_hw_blk_init(&c->base, DPU_HW_BLK_INTF, idx, &dpu_hw_ops);
> -	if (rc) {
> -		DPU_ERROR("failed to init hw blk %d\n", rc);
> -		goto blk_init_error;
> -	}
> +	dpu_hw_blk_init(&c->base, DPU_HW_BLK_INTF, idx, &dpu_hw_ops);
>  
>  	return c;
> -
> -blk_init_error:
> -	kzfree(c);
> -
> -	return ERR_PTR(rc);
>  }
>  
>  void dpu_hw_intf_destroy(struct dpu_hw_intf *intf)
> 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 c76b5cc949fb..9f342af2aba7 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
> @@ -175,10 +175,7 @@ static void _setup_mixer_ops(struct dpu_mdss_cfg *m,
>  	ops->setup_gc = dpu_hw_lm_gc;
>  };
>  
> -static struct dpu_hw_blk_ops dpu_hw_ops = {
> -	.start = NULL,
> -	.stop = NULL,
> -};
> +static struct dpu_hw_blk_ops dpu_hw_ops;
>  
>  struct dpu_hw_mixer *dpu_hw_lm_init(enum dpu_lm idx,
>  		void __iomem *addr,
> @@ -186,7 +183,6 @@ struct dpu_hw_mixer *dpu_hw_lm_init(enum dpu_lm idx,
>  {
>  	struct dpu_hw_mixer *c;
>  	struct dpu_lm_cfg *cfg;
> -	int rc;
>  
>  	c = kzalloc(sizeof(*c), GFP_KERNEL);
>  	if (!c)
> @@ -203,18 +199,9 @@ struct dpu_hw_mixer *dpu_hw_lm_init(enum dpu_lm idx,
>  	c->cap = cfg;
>  	_setup_mixer_ops(m, &c->ops, c->cap->features);
>  
> -	rc = dpu_hw_blk_init(&c->base, DPU_HW_BLK_LM, idx, &dpu_hw_ops);
> -	if (rc) {
> -		DPU_ERROR("failed to init hw blk %d\n", rc);
> -		goto blk_init_error;
> -	}
> +	dpu_hw_blk_init(&c->base, DPU_HW_BLK_LM, idx, &dpu_hw_ops);
>  
>  	return c;
> -
> -blk_init_error:
> -	kzfree(c);
> -
> -	return ERR_PTR(rc);
>  }
>  
>  void dpu_hw_lm_destroy(struct dpu_hw_mixer *lm)
> 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 cfc93816078f..3bdf47ed1845 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
> @@ -199,10 +199,7 @@ static void _setup_pingpong_ops(struct dpu_hw_pingpong_ops *ops,
>  	ops->get_line_count = dpu_hw_pp_get_line_count;
>  };
>  
> -static struct dpu_hw_blk_ops dpu_hw_ops = {
> -	.start = NULL,
> -	.stop = NULL,
> -};
> +static struct dpu_hw_blk_ops dpu_hw_ops;
>  
>  struct dpu_hw_pingpong *dpu_hw_pingpong_init(enum dpu_pingpong idx,
>  		void __iomem *addr,
> @@ -210,7 +207,6 @@ struct dpu_hw_pingpong *dpu_hw_pingpong_init(enum dpu_pingpong idx,
>  {
>  	struct dpu_hw_pingpong *c;
>  	struct dpu_pingpong_cfg *cfg;
> -	int rc;
>  
>  	c = kzalloc(sizeof(*c), GFP_KERNEL);
>  	if (!c)
> @@ -226,18 +222,9 @@ struct dpu_hw_pingpong *dpu_hw_pingpong_init(enum dpu_pingpong idx,
>  	c->caps = cfg;
>  	_setup_pingpong_ops(&c->ops, c->caps);
>  
> -	rc = dpu_hw_blk_init(&c->base, DPU_HW_BLK_PINGPONG, idx, &dpu_hw_ops);
> -	if (rc) {
> -		DPU_ERROR("failed to init hw blk %d\n", rc);
> -		goto blk_init_error;
> -	}
> +	dpu_hw_blk_init(&c->base, DPU_HW_BLK_PINGPONG, idx, &dpu_hw_ops);
>  
>  	return c;
> -
> -blk_init_error:
> -	kzfree(c);
> -
> -	return ERR_PTR(rc);
>  }
>  
>  void dpu_hw_pingpong_destroy(struct dpu_hw_pingpong *pp)
> 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 8297963d2c4c..3ebdf292d8f2 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
> @@ -696,10 +696,7 @@ static struct dpu_sspp_cfg *_sspp_offset(enum dpu_sspp sspp,
>  	return ERR_PTR(-ENOMEM);
>  }
>  
> -static struct dpu_hw_blk_ops dpu_hw_ops = {
> -	.start = NULL,
> -	.stop = NULL,
> -};
> +static struct dpu_hw_blk_ops dpu_hw_ops;
>  
>  struct dpu_hw_pipe *dpu_hw_sspp_init(enum dpu_sspp idx,
>  		void __iomem *addr, struct dpu_mdss_cfg *catalog,
> @@ -707,7 +704,6 @@ struct dpu_hw_pipe *dpu_hw_sspp_init(enum dpu_sspp idx,
>  {
>  	struct dpu_hw_pipe *hw_pipe;
>  	struct dpu_sspp_cfg *cfg;
> -	int rc;
>  
>  	if (!addr || !catalog)
>  		return ERR_PTR(-EINVAL);
> @@ -729,18 +725,9 @@ struct dpu_hw_pipe *dpu_hw_sspp_init(enum dpu_sspp idx,
>  	hw_pipe->cap = cfg;
>  	_setup_layer_ops(hw_pipe, hw_pipe->cap->features);
>  
> -	rc = dpu_hw_blk_init(&hw_pipe->base, DPU_HW_BLK_SSPP, idx, &dpu_hw_ops);
> -	if (rc) {
> -		DPU_ERROR("failed to init hw blk %d\n", rc);
> -		goto blk_init_error;
> -	}
> +	dpu_hw_blk_init(&hw_pipe->base, DPU_HW_BLK_SSPP, idx, &dpu_hw_ops);
>  
>  	return hw_pipe;
> -
> -blk_init_error:
> -	kzfree(hw_pipe);
> -
> -	return ERR_PTR(rc);
>  }
>  
>  void dpu_hw_sspp_destroy(struct dpu_hw_pipe *ctx)
> 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 f7e0f661a8bb..a041597bb849 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c
> @@ -321,10 +321,7 @@ static const struct dpu_mdp_cfg *_top_offset(enum dpu_mdp mdp,
>  	return ERR_PTR(-EINVAL);
>  }
>  
> -static struct dpu_hw_blk_ops dpu_hw_ops = {
> -	.start = NULL,
> -	.stop = NULL,
> -};
> +static struct dpu_hw_blk_ops dpu_hw_ops;
>  
>  struct dpu_hw_mdp *dpu_hw_mdptop_init(enum dpu_mdp idx,
>  		void __iomem *addr,
> @@ -332,7 +329,6 @@ struct dpu_hw_mdp *dpu_hw_mdptop_init(enum dpu_mdp idx,
>  {
>  	struct dpu_hw_mdp *mdp;
>  	const struct dpu_mdp_cfg *cfg;
> -	int rc;
>  
>  	if (!addr || !m)
>  		return ERR_PTR(-EINVAL);
> @@ -354,18 +350,9 @@ struct dpu_hw_mdp *dpu_hw_mdptop_init(enum dpu_mdp idx,
>  	mdp->caps = cfg;
>  	_setup_mdp_ops(&mdp->ops, mdp->caps->features);
>  
> -	rc = dpu_hw_blk_init(&mdp->base, DPU_HW_BLK_TOP, idx, &dpu_hw_ops);
> -	if (rc) {
> -		DPU_ERROR("failed to init hw blk %d\n", rc);
> -		goto blk_init_error;
> -	}
> +	dpu_hw_blk_init(&mdp->base, DPU_HW_BLK_TOP, idx, &dpu_hw_ops);
>  
>  	return mdp;
> -
> -blk_init_error:
> -	kzfree(mdp);
> -
> -	return ERR_PTR(rc);
>  }
>  
>  void dpu_hw_mdp_destroy(struct dpu_hw_mdp *mdp)
> -- 
> 2.18.0
> 
> _______________________________________________
> Freedreno mailing list
> [e-mail]
> https://lists.freedesktop.org/mailman/listinfo/freedreno

Patch

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c
index 58d29e43faef..92f1c4241b9a 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c
@@ -30,16 +30,10 @@  static LIST_HEAD(dpu_hw_blk_list);
  * @type: hw block type - enum dpu_hw_blk_type
  * @id: instance id of the hw block
  * @ops: Pointer to block operations
- * return: 0 if success; error code otherwise
  */
-int dpu_hw_blk_init(struct dpu_hw_blk *hw_blk, u32 type, int id,
+void dpu_hw_blk_init(struct dpu_hw_blk *hw_blk, u32 type, int id,
 		struct dpu_hw_blk_ops *ops)
 {
-	if (!hw_blk) {
-		pr_err("invalid parameters\n");
-		return -EINVAL;
-	}
-
 	INIT_LIST_HEAD(&hw_blk->list);
 	hw_blk->type = type;
 	hw_blk->id = id;
@@ -51,8 +45,6 @@  int dpu_hw_blk_init(struct dpu_hw_blk *hw_blk, u32 type, int id,
 	mutex_lock(&dpu_hw_blk_lock);
 	list_add(&hw_blk->list, &dpu_hw_blk_list);
 	mutex_unlock(&dpu_hw_blk_lock);
-
-	return 0;
 }
 
 /**
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.h
index 0f4ca8af1ec5..1934c2f7e8fa 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.h
@@ -44,7 +44,7 @@  struct dpu_hw_blk {
 	struct dpu_hw_blk_ops ops;
 };
 
-int dpu_hw_blk_init(struct dpu_hw_blk *hw_blk, u32 type, int id,
+void dpu_hw_blk_init(struct dpu_hw_blk *hw_blk, u32 type, int id,
 		struct dpu_hw_blk_ops *ops);
 void dpu_hw_blk_destroy(struct dpu_hw_blk *hw_blk);
 
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 4aab04335c6d..1068b4b7940f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
@@ -483,10 +483,7 @@  static void _setup_ctl_ops(struct dpu_hw_ctl_ops *ops,
 	ops->get_bitmask_intf = dpu_hw_ctl_get_bitmask_intf;
 };
 
-static struct dpu_hw_blk_ops dpu_hw_ops = {
-	.start = NULL,
-	.stop = NULL,
-};
+static struct dpu_hw_blk_ops dpu_hw_ops;
 
 struct dpu_hw_ctl *dpu_hw_ctl_init(enum dpu_ctl idx,
 		void __iomem *addr,
@@ -494,7 +491,6 @@  struct dpu_hw_ctl *dpu_hw_ctl_init(enum dpu_ctl idx,
 {
 	struct dpu_hw_ctl *c;
 	struct dpu_ctl_cfg *cfg;
-	int rc;
 
 	c = kzalloc(sizeof(*c), GFP_KERNEL);
 	if (!c)
@@ -513,18 +509,9 @@  struct dpu_hw_ctl *dpu_hw_ctl_init(enum dpu_ctl idx,
 	c->mixer_count = m->mixer_count;
 	c->mixer_hw_caps = m->mixer;
 
-	rc = dpu_hw_blk_init(&c->base, DPU_HW_BLK_CTL, idx, &dpu_hw_ops);
-	if (rc) {
-		DPU_ERROR("failed to init hw blk %d\n", rc);
-		goto blk_init_error;
-	}
+	dpu_hw_blk_init(&c->base, DPU_HW_BLK_CTL, idx, &dpu_hw_ops);
 
 	return c;
-
-blk_init_error:
-	kzfree(c);
-
-	return ERR_PTR(rc);
 }
 
 void dpu_hw_ctl_destroy(struct dpu_hw_ctl *ctx)
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 695d27a730e8..f6a83daa385b 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -264,10 +264,7 @@  static void _setup_intf_ops(struct dpu_hw_intf_ops *ops,
 	ops->get_line_count = dpu_hw_intf_get_line_count;
 }
 
-static struct dpu_hw_blk_ops dpu_hw_ops = {
-	.start = NULL,
-	.stop = NULL,
-};
+static struct dpu_hw_blk_ops dpu_hw_ops;
 
 struct dpu_hw_intf *dpu_hw_intf_init(enum dpu_intf idx,
 		void __iomem *addr,
@@ -275,7 +272,6 @@  struct dpu_hw_intf *dpu_hw_intf_init(enum dpu_intf idx,
 {
 	struct dpu_hw_intf *c;
 	struct dpu_intf_cfg *cfg;
-	int rc;
 
 	c = kzalloc(sizeof(*c), GFP_KERNEL);
 	if (!c)
@@ -296,18 +292,9 @@  struct dpu_hw_intf *dpu_hw_intf_init(enum dpu_intf idx,
 	c->mdss = m;
 	_setup_intf_ops(&c->ops, c->cap->features);
 
-	rc = dpu_hw_blk_init(&c->base, DPU_HW_BLK_INTF, idx, &dpu_hw_ops);
-	if (rc) {
-		DPU_ERROR("failed to init hw blk %d\n", rc);
-		goto blk_init_error;
-	}
+	dpu_hw_blk_init(&c->base, DPU_HW_BLK_INTF, idx, &dpu_hw_ops);
 
 	return c;
-
-blk_init_error:
-	kzfree(c);
-
-	return ERR_PTR(rc);
 }
 
 void dpu_hw_intf_destroy(struct dpu_hw_intf *intf)
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 c76b5cc949fb..9f342af2aba7 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c
@@ -175,10 +175,7 @@  static void _setup_mixer_ops(struct dpu_mdss_cfg *m,
 	ops->setup_gc = dpu_hw_lm_gc;
 };
 
-static struct dpu_hw_blk_ops dpu_hw_ops = {
-	.start = NULL,
-	.stop = NULL,
-};
+static struct dpu_hw_blk_ops dpu_hw_ops;
 
 struct dpu_hw_mixer *dpu_hw_lm_init(enum dpu_lm idx,
 		void __iomem *addr,
@@ -186,7 +183,6 @@  struct dpu_hw_mixer *dpu_hw_lm_init(enum dpu_lm idx,
 {
 	struct dpu_hw_mixer *c;
 	struct dpu_lm_cfg *cfg;
-	int rc;
 
 	c = kzalloc(sizeof(*c), GFP_KERNEL);
 	if (!c)
@@ -203,18 +199,9 @@  struct dpu_hw_mixer *dpu_hw_lm_init(enum dpu_lm idx,
 	c->cap = cfg;
 	_setup_mixer_ops(m, &c->ops, c->cap->features);
 
-	rc = dpu_hw_blk_init(&c->base, DPU_HW_BLK_LM, idx, &dpu_hw_ops);
-	if (rc) {
-		DPU_ERROR("failed to init hw blk %d\n", rc);
-		goto blk_init_error;
-	}
+	dpu_hw_blk_init(&c->base, DPU_HW_BLK_LM, idx, &dpu_hw_ops);
 
 	return c;
-
-blk_init_error:
-	kzfree(c);
-
-	return ERR_PTR(rc);
 }
 
 void dpu_hw_lm_destroy(struct dpu_hw_mixer *lm)
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 cfc93816078f..3bdf47ed1845 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
@@ -199,10 +199,7 @@  static void _setup_pingpong_ops(struct dpu_hw_pingpong_ops *ops,
 	ops->get_line_count = dpu_hw_pp_get_line_count;
 };
 
-static struct dpu_hw_blk_ops dpu_hw_ops = {
-	.start = NULL,
-	.stop = NULL,
-};
+static struct dpu_hw_blk_ops dpu_hw_ops;
 
 struct dpu_hw_pingpong *dpu_hw_pingpong_init(enum dpu_pingpong idx,
 		void __iomem *addr,
@@ -210,7 +207,6 @@  struct dpu_hw_pingpong *dpu_hw_pingpong_init(enum dpu_pingpong idx,
 {
 	struct dpu_hw_pingpong *c;
 	struct dpu_pingpong_cfg *cfg;
-	int rc;
 
 	c = kzalloc(sizeof(*c), GFP_KERNEL);
 	if (!c)
@@ -226,18 +222,9 @@  struct dpu_hw_pingpong *dpu_hw_pingpong_init(enum dpu_pingpong idx,
 	c->caps = cfg;
 	_setup_pingpong_ops(&c->ops, c->caps);
 
-	rc = dpu_hw_blk_init(&c->base, DPU_HW_BLK_PINGPONG, idx, &dpu_hw_ops);
-	if (rc) {
-		DPU_ERROR("failed to init hw blk %d\n", rc);
-		goto blk_init_error;
-	}
+	dpu_hw_blk_init(&c->base, DPU_HW_BLK_PINGPONG, idx, &dpu_hw_ops);
 
 	return c;
-
-blk_init_error:
-	kzfree(c);
-
-	return ERR_PTR(rc);
 }
 
 void dpu_hw_pingpong_destroy(struct dpu_hw_pingpong *pp)
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 8297963d2c4c..3ebdf292d8f2 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
@@ -696,10 +696,7 @@  static struct dpu_sspp_cfg *_sspp_offset(enum dpu_sspp sspp,
 	return ERR_PTR(-ENOMEM);
 }
 
-static struct dpu_hw_blk_ops dpu_hw_ops = {
-	.start = NULL,
-	.stop = NULL,
-};
+static struct dpu_hw_blk_ops dpu_hw_ops;
 
 struct dpu_hw_pipe *dpu_hw_sspp_init(enum dpu_sspp idx,
 		void __iomem *addr, struct dpu_mdss_cfg *catalog,
@@ -707,7 +704,6 @@  struct dpu_hw_pipe *dpu_hw_sspp_init(enum dpu_sspp idx,
 {
 	struct dpu_hw_pipe *hw_pipe;
 	struct dpu_sspp_cfg *cfg;
-	int rc;
 
 	if (!addr || !catalog)
 		return ERR_PTR(-EINVAL);
@@ -729,18 +725,9 @@  struct dpu_hw_pipe *dpu_hw_sspp_init(enum dpu_sspp idx,
 	hw_pipe->cap = cfg;
 	_setup_layer_ops(hw_pipe, hw_pipe->cap->features);
 
-	rc = dpu_hw_blk_init(&hw_pipe->base, DPU_HW_BLK_SSPP, idx, &dpu_hw_ops);
-	if (rc) {
-		DPU_ERROR("failed to init hw blk %d\n", rc);
-		goto blk_init_error;
-	}
+	dpu_hw_blk_init(&hw_pipe->base, DPU_HW_BLK_SSPP, idx, &dpu_hw_ops);
 
 	return hw_pipe;
-
-blk_init_error:
-	kzfree(hw_pipe);
-
-	return ERR_PTR(rc);
 }
 
 void dpu_hw_sspp_destroy(struct dpu_hw_pipe *ctx)
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 f7e0f661a8bb..a041597bb849 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c
@@ -321,10 +321,7 @@  static const struct dpu_mdp_cfg *_top_offset(enum dpu_mdp mdp,
 	return ERR_PTR(-EINVAL);
 }
 
-static struct dpu_hw_blk_ops dpu_hw_ops = {
-	.start = NULL,
-	.stop = NULL,
-};
+static struct dpu_hw_blk_ops dpu_hw_ops;
 
 struct dpu_hw_mdp *dpu_hw_mdptop_init(enum dpu_mdp idx,
 		void __iomem *addr,
@@ -332,7 +329,6 @@  struct dpu_hw_mdp *dpu_hw_mdptop_init(enum dpu_mdp idx,
 {
 	struct dpu_hw_mdp *mdp;
 	const struct dpu_mdp_cfg *cfg;
-	int rc;
 
 	if (!addr || !m)
 		return ERR_PTR(-EINVAL);
@@ -354,18 +350,9 @@  struct dpu_hw_mdp *dpu_hw_mdptop_init(enum dpu_mdp idx,
 	mdp->caps = cfg;
 	_setup_mdp_ops(&mdp->ops, mdp->caps->features);
 
-	rc = dpu_hw_blk_init(&mdp->base, DPU_HW_BLK_TOP, idx, &dpu_hw_ops);
-	if (rc) {
-		DPU_ERROR("failed to init hw blk %d\n", rc);
-		goto blk_init_error;
-	}
+	dpu_hw_blk_init(&mdp->base, DPU_HW_BLK_TOP, idx, &dpu_hw_ops);
 
 	return mdp;
-
-blk_init_error:
-	kzfree(mdp);
-
-	return ERR_PTR(rc);
 }
 
 void dpu_hw_mdp_destroy(struct dpu_hw_mdp *mdp)