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* drm/mediatek: fixup ovl vblank callback data null pointer issue
@ 2022-03-14  8:08 ` Yongqiang Niu
  0 siblings, 0 replies; 12+ messages in thread
From: Yongqiang Niu @ 2022-03-14  8:08 UTC (permalink / raw)
  To: Chun-Kuang Hu
  Cc: Rob Herring, Matthias Brugger, Philipp Zabel, David Airlie,
	Daniel Vetter, Jassi Brar, Yongqiang Niu, Fabien Parent,
	Dennis YC Hsieh, devicetree, linux-arm-kernel, linux-mediatek,
	linux-kernel, dri-devel, Project_Global_Chrome_Upstream_Group,
	Hsin-Yi Wang

base linux v5.17-rc1

Yongqiang Niu (1):
  drm/mediatek: fixup ovl vblank callback data null pointer issue

 drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 -
 1 file changed, 1 deletion(-)

-- 
2.25.1


^ permalink raw reply	[flat|nested] 12+ messages in thread
* drm/mediatek: fixup ovl vblank callback data null pointer issue
@ 2022-03-14  8:08 ` Yongqiang Niu
  0 siblings, 0 replies; 12+ messages in thread
From: Yongqiang Niu @ 2022-03-14  8:08 UTC (permalink / raw)
  To: Chun-Kuang Hu
  Cc: devicetree, Project_Global_Chrome_Upstream_Group, David Airlie,
	Jassi Brar, linux-kernel, dri-devel, Yongqiang Niu,
	Dennis YC Hsieh, Fabien Parent, Rob Herring, linux-mediatek,
	Hsin-Yi Wang, Matthias Brugger, linux-arm-kernel

base linux v5.17-rc1

Yongqiang Niu (1):
  drm/mediatek: fixup ovl vblank callback data null pointer issue

 drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 -
 1 file changed, 1 deletion(-)

-- 
2.25.1


^ permalink raw reply	[flat|nested] 12+ messages in thread
* drm/mediatek: fixup ovl vblank callback data null pointer issue
@ 2022-03-14  8:08 ` Yongqiang Niu
  0 siblings, 0 replies; 12+ messages in thread
From: Yongqiang Niu @ 2022-03-14  8:08 UTC (permalink / raw)
  To: Chun-Kuang Hu
  Cc: Rob Herring, Matthias Brugger, Philipp Zabel, David Airlie,
	Daniel Vetter, Jassi Brar, Yongqiang Niu, Fabien Parent,
	Dennis YC Hsieh, devicetree, linux-arm-kernel, linux-mediatek,
	linux-kernel, dri-devel, Project_Global_Chrome_Upstream_Group,
	Hsin-Yi Wang

base linux v5.17-rc1

Yongqiang Niu (1):
  drm/mediatek: fixup ovl vblank callback data null pointer issue

 drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 -
 1 file changed, 1 deletion(-)

-- 
2.25.1


_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

^ permalink raw reply	[flat|nested] 12+ messages in thread
* drm/mediatek: fixup ovl vblank callback data null pointer issue
@ 2022-03-14  8:08 ` Yongqiang Niu
  0 siblings, 0 replies; 12+ messages in thread
From: Yongqiang Niu @ 2022-03-14  8:08 UTC (permalink / raw)
  To: Chun-Kuang Hu
  Cc: Rob Herring, Matthias Brugger, Philipp Zabel, David Airlie,
	Daniel Vetter, Jassi Brar, Yongqiang Niu, Fabien Parent,
	Dennis YC Hsieh, devicetree, linux-arm-kernel, linux-mediatek,
	linux-kernel, dri-devel, Project_Global_Chrome_Upstream_Group,
	Hsin-Yi Wang

base linux v5.17-rc1

Yongqiang Niu (1):
  drm/mediatek: fixup ovl vblank callback data null pointer issue

 drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 -
 1 file changed, 1 deletion(-)

-- 
2.25.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 12+ messages in thread
* [PATCH v1, 1/1] drm/mediatek: fixup ovl vblank callback data null pointer issue
  2022-03-14  8:08 ` Yongqiang Niu
  (?)
  (?)
@ 2022-03-14  8:08   ` Yongqiang Niu
  -1 siblings, 0 replies; 12+ messages in thread
From: Yongqiang Niu @ 2022-03-14  8:08 UTC (permalink / raw)
  To: Chun-Kuang Hu
  Cc: Rob Herring, Matthias Brugger, Philipp Zabel, David Airlie,
	Daniel Vetter, Jassi Brar, Yongqiang Niu, Fabien Parent,
	Dennis YC Hsieh, devicetree, linux-arm-kernel, linux-mediatek,
	linux-kernel, dri-devel, Project_Global_Chrome_Upstream_Group,
	Hsin-Yi Wang

ovl vblank_cb_data will be null pointer when disable ovl
vblank

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index 2146299e5f52..f3a450c0ef2d 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -113,7 +113,6 @@ void mtk_ovl_disable_vblank(struct device *dev)
 	struct mtk_disp_ovl *ovl = dev_get_drvdata(dev);
 
 	ovl->vblank_cb = NULL;
-	ovl->vblank_cb_data = NULL;
 	writel_relaxed(0x0, ovl->regs + DISP_REG_OVL_INTEN);
 }
 
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 12+ messages in thread
* [PATCH v1, 1/1] drm/mediatek: fixup ovl vblank callback data null pointer issue
@ 2022-03-14  8:08   ` Yongqiang Niu
  0 siblings, 0 replies; 12+ messages in thread
From: Yongqiang Niu @ 2022-03-14  8:08 UTC (permalink / raw)
  To: Chun-Kuang Hu
  Cc: devicetree, Project_Global_Chrome_Upstream_Group, David Airlie,
	Jassi Brar, linux-kernel, dri-devel, Yongqiang Niu,
	Dennis YC Hsieh, Fabien Parent, Rob Herring, linux-mediatek,
	Hsin-Yi Wang, Matthias Brugger, linux-arm-kernel

ovl vblank_cb_data will be null pointer when disable ovl
vblank

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index 2146299e5f52..f3a450c0ef2d 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -113,7 +113,6 @@ void mtk_ovl_disable_vblank(struct device *dev)
 	struct mtk_disp_ovl *ovl = dev_get_drvdata(dev);
 
 	ovl->vblank_cb = NULL;
-	ovl->vblank_cb_data = NULL;
 	writel_relaxed(0x0, ovl->regs + DISP_REG_OVL_INTEN);
 }
 
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 12+ messages in thread
* [PATCH v1, 1/1] drm/mediatek: fixup ovl vblank callback data null pointer issue
@ 2022-03-14  8:08   ` Yongqiang Niu
  0 siblings, 0 replies; 12+ messages in thread
From: Yongqiang Niu @ 2022-03-14  8:08 UTC (permalink / raw)
  To: Chun-Kuang Hu
  Cc: Rob Herring, Matthias Brugger, Philipp Zabel, David Airlie,
	Daniel Vetter, Jassi Brar, Yongqiang Niu, Fabien Parent,
	Dennis YC Hsieh, devicetree, linux-arm-kernel, linux-mediatek,
	linux-kernel, dri-devel, Project_Global_Chrome_Upstream_Group,
	Hsin-Yi Wang

ovl vblank_cb_data will be null pointer when disable ovl
vblank

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index 2146299e5f52..f3a450c0ef2d 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -113,7 +113,6 @@ void mtk_ovl_disable_vblank(struct device *dev)
 	struct mtk_disp_ovl *ovl = dev_get_drvdata(dev);
 
 	ovl->vblank_cb = NULL;
-	ovl->vblank_cb_data = NULL;
 	writel_relaxed(0x0, ovl->regs + DISP_REG_OVL_INTEN);
 }
 
-- 
2.25.1


_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

^ permalink raw reply related	[flat|nested] 12+ messages in thread
* [PATCH v1, 1/1] drm/mediatek: fixup ovl vblank callback data null pointer issue
@ 2022-03-14  8:08   ` Yongqiang Niu
  0 siblings, 0 replies; 12+ messages in thread
From: Yongqiang Niu @ 2022-03-14  8:08 UTC (permalink / raw)
  To: Chun-Kuang Hu
  Cc: Rob Herring, Matthias Brugger, Philipp Zabel, David Airlie,
	Daniel Vetter, Jassi Brar, Yongqiang Niu, Fabien Parent,
	Dennis YC Hsieh, devicetree, linux-arm-kernel, linux-mediatek,
	linux-kernel, dri-devel, Project_Global_Chrome_Upstream_Group,
	Hsin-Yi Wang

ovl vblank_cb_data will be null pointer when disable ovl
vblank

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index 2146299e5f52..f3a450c0ef2d 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -113,7 +113,6 @@ void mtk_ovl_disable_vblank(struct device *dev)
 	struct mtk_disp_ovl *ovl = dev_get_drvdata(dev);
 
 	ovl->vblank_cb = NULL;
-	ovl->vblank_cb_data = NULL;
 	writel_relaxed(0x0, ovl->regs + DISP_REG_OVL_INTEN);
 }
 
-- 
2.25.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply related	[flat|nested] 12+ messages in thread
* Re: [PATCH v1, 1/1] drm/mediatek: fixup ovl vblank callback data null pointer issue
  2022-03-14  8:08   ` Yongqiang Niu
  (?)
  (?)
@ 2022-03-17 12:46     ` Rex-BC Chen
  -1 siblings, 0 replies; 12+ messages in thread
From: Rex-BC Chen @ 2022-03-17 12:46 UTC (permalink / raw)
  To: Yongqiang Niu, Chun-Kuang Hu
  Cc: Rob Herring, Matthias Brugger, Philipp Zabel, David Airlie,
	Daniel Vetter, Jassi Brar, Fabien Parent, Dennis YC Hsieh,
	devicetree, linux-arm-kernel, linux-mediatek, linux-kernel,
	dri-devel, Project_Global_Chrome_Upstream_Group, Hsin-Yi Wang

On Mon, 2022-03-14 at 16:08 +0800, Yongqiang Niu wrote:
> ovl vblank_cb_data will be null pointer when disable ovl
> vblank
> 

Hello Yongqiang,

What issue do you encounter?
Is it a timing issue?

> Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> index 2146299e5f52..f3a450c0ef2d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> @@ -113,7 +113,6 @@ void mtk_ovl_disable_vblank(struct device *dev)
>  	struct mtk_disp_ovl *ovl = dev_get_drvdata(dev);
>  
>  	ovl->vblank_cb = NULL;
> -	ovl->vblank_cb_data = NULL;

IMO, this may be not a good solution.
If this is a timing issue and you don't need to handle irq after
disable vblank.
I think you should handle  ovl->vblank_cb_data == NULL in
mtk_disp_ovl_irq_handler?

If I am wrong, please correct me.

Thanks.

BRs,
Rex

>  	writel_relaxed(0x0, ovl->regs + DISP_REG_OVL_INTEN);
>  }
>  


^ permalink raw reply	[flat|nested] 12+ messages in thread
* Re: [PATCH v1, 1/1] drm/mediatek: fixup ovl vblank callback data null pointer issue
@ 2022-03-17 12:46     ` Rex-BC Chen
  0 siblings, 0 replies; 12+ messages in thread
From: Rex-BC Chen @ 2022-03-17 12:46 UTC (permalink / raw)
  To: Yongqiang Niu, Chun-Kuang Hu
  Cc: devicetree, Project_Global_Chrome_Upstream_Group, David Airlie,
	Jassi Brar, linux-kernel, dri-devel, Dennis YC Hsieh,
	Fabien Parent, Rob Herring, linux-mediatek, Hsin-Yi Wang,
	Matthias Brugger, linux-arm-kernel

On Mon, 2022-03-14 at 16:08 +0800, Yongqiang Niu wrote:
> ovl vblank_cb_data will be null pointer when disable ovl
> vblank
> 

Hello Yongqiang,

What issue do you encounter?
Is it a timing issue?

> Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> index 2146299e5f52..f3a450c0ef2d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> @@ -113,7 +113,6 @@ void mtk_ovl_disable_vblank(struct device *dev)
>  	struct mtk_disp_ovl *ovl = dev_get_drvdata(dev);
>  
>  	ovl->vblank_cb = NULL;
> -	ovl->vblank_cb_data = NULL;

IMO, this may be not a good solution.
If this is a timing issue and you don't need to handle irq after
disable vblank.
I think you should handle  ovl->vblank_cb_data == NULL in
mtk_disp_ovl_irq_handler?

If I am wrong, please correct me.

Thanks.

BRs,
Rex

>  	writel_relaxed(0x0, ovl->regs + DISP_REG_OVL_INTEN);
>  }
>  


^ permalink raw reply	[flat|nested] 12+ messages in thread
* Re: [PATCH v1, 1/1] drm/mediatek: fixup ovl vblank callback data null pointer issue
@ 2022-03-17 12:46     ` Rex-BC Chen
  0 siblings, 0 replies; 12+ messages in thread
From: Rex-BC Chen @ 2022-03-17 12:46 UTC (permalink / raw)
  To: Yongqiang Niu, Chun-Kuang Hu
  Cc: Rob Herring, Matthias Brugger, Philipp Zabel, David Airlie,
	Daniel Vetter, Jassi Brar, Fabien Parent, Dennis YC Hsieh,
	devicetree, linux-arm-kernel, linux-mediatek, linux-kernel,
	dri-devel, Project_Global_Chrome_Upstream_Group, Hsin-Yi Wang

On Mon, 2022-03-14 at 16:08 +0800, Yongqiang Niu wrote:
> ovl vblank_cb_data will be null pointer when disable ovl
> vblank
> 

Hello Yongqiang,

What issue do you encounter?
Is it a timing issue?

> Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> index 2146299e5f52..f3a450c0ef2d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> @@ -113,7 +113,6 @@ void mtk_ovl_disable_vblank(struct device *dev)
>  	struct mtk_disp_ovl *ovl = dev_get_drvdata(dev);
>  
>  	ovl->vblank_cb = NULL;
> -	ovl->vblank_cb_data = NULL;

IMO, this may be not a good solution.
If this is a timing issue and you don't need to handle irq after
disable vblank.
I think you should handle  ovl->vblank_cb_data == NULL in
mtk_disp_ovl_irq_handler?

If I am wrong, please correct me.

Thanks.

BRs,
Rex

>  	writel_relaxed(0x0, ovl->regs + DISP_REG_OVL_INTEN);
>  }
>  


_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

^ permalink raw reply	[flat|nested] 12+ messages in thread
* Re: [PATCH v1, 1/1] drm/mediatek: fixup ovl vblank callback data null pointer issue
@ 2022-03-17 12:46     ` Rex-BC Chen
  0 siblings, 0 replies; 12+ messages in thread
From: Rex-BC Chen @ 2022-03-17 12:46 UTC (permalink / raw)
  To: Yongqiang Niu, Chun-Kuang Hu
  Cc: Rob Herring, Matthias Brugger, Philipp Zabel, David Airlie,
	Daniel Vetter, Jassi Brar, Fabien Parent, Dennis YC Hsieh,
	devicetree, linux-arm-kernel, linux-mediatek, linux-kernel,
	dri-devel, Project_Global_Chrome_Upstream_Group, Hsin-Yi Wang

On Mon, 2022-03-14 at 16:08 +0800, Yongqiang Niu wrote:
> ovl vblank_cb_data will be null pointer when disable ovl
> vblank
> 

Hello Yongqiang,

What issue do you encounter?
Is it a timing issue?

> Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> index 2146299e5f52..f3a450c0ef2d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> @@ -113,7 +113,6 @@ void mtk_ovl_disable_vblank(struct device *dev)
>  	struct mtk_disp_ovl *ovl = dev_get_drvdata(dev);
>  
>  	ovl->vblank_cb = NULL;
> -	ovl->vblank_cb_data = NULL;

IMO, this may be not a good solution.
If this is a timing issue and you don't need to handle irq after
disable vblank.
I think you should handle  ovl->vblank_cb_data == NULL in
mtk_disp_ovl_irq_handler?

If I am wrong, please correct me.

Thanks.

BRs,
Rex

>  	writel_relaxed(0x0, ovl->regs + DISP_REG_OVL_INTEN);
>  }
>  


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 12+ messages in thread
end of thread, other threads:[~2022-03-17 12:48 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-03-14  8:08 drm/mediatek: fixup ovl vblank callback data null pointer issue Yongqiang Niu
2022-03-14  8:08 ` Yongqiang Niu
2022-03-14  8:08 ` Yongqiang Niu
2022-03-14  8:08 ` Yongqiang Niu
2022-03-14  8:08 ` [PATCH v1, 1/1] " Yongqiang Niu
2022-03-14  8:08   ` Yongqiang Niu
2022-03-14  8:08   ` Yongqiang Niu
2022-03-14  8:08   ` Yongqiang Niu
2022-03-17 12:46   ` Rex-BC Chen
2022-03-17 12:46     ` Rex-BC Chen
2022-03-17 12:46     ` Rex-BC Chen
2022-03-17 12:46     ` Rex-BC Chen

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