[v4] drm/bridge: microchip-lvds: clean up and fix bus formats

[PATCH v4 1/3] drm/bridge: microchip-lvds: drop unused drm_panel

Posted by Dharma Balasubiramani 3 months, 2 weeks ago

Drop the drm_panel field of the mchp_lvds struct as it is unused.

Signed-off-by: Dharma Balasubiramani <dharma.b@microchip.com>
---
 drivers/gpu/drm/bridge/microchip-lvds.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/gpu/drm/bridge/microchip-lvds.c b/drivers/gpu/drm/bridge/microchip-lvds.c
index 9f4ff82bc6b4..42751124b868 100644
--- a/drivers/gpu/drm/bridge/microchip-lvds.c
+++ b/drivers/gpu/drm/bridge/microchip-lvds.c
@@ -23,7 +23,6 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_bridge.h>
 #include <drm/drm_of.h>
-#include <drm/drm_panel.h>
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_simple_kms_helper.h>
@@ -56,7 +55,6 @@ struct mchp_lvds {
 	struct device *dev;
 	void __iomem *regs;
 	struct clk *pclk;
-	struct drm_panel *panel;
 	struct drm_bridge bridge;
 	struct drm_bridge *panel_bridge;
 };
@@ -179,13 +177,8 @@ static int mchp_lvds_probe(struct platform_device *pdev)
 			"can't find port point, please init lvds panel port!\n");
 		return -ENODEV;
 	}
-
-	lvds->panel = of_drm_find_panel(port);
 	of_node_put(port);
 
-	if (IS_ERR(lvds->panel))
-		return -EPROBE_DEFER;
-
 	lvds->panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
 
 	if (IS_ERR(lvds->panel_bridge))

-- 
2.43.0

Re: [PATCH v4 1/3] drm/bridge: microchip-lvds: drop unused drm_panel

Posted by Laurent Pinchart 3 months, 2 weeks ago

On Tue, Jun 24, 2025 at 02:54:14PM +0530, Dharma Balasubiramani wrote:
> Drop the drm_panel field of the mchp_lvds struct as it is unused.
> 
> Signed-off-by: Dharma Balasubiramani <dharma.b@microchip.com>
> ---
>  drivers/gpu/drm/bridge/microchip-lvds.c | 7 -------
>  1 file changed, 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/microchip-lvds.c b/drivers/gpu/drm/bridge/microchip-lvds.c
> index 9f4ff82bc6b4..42751124b868 100644
> --- a/drivers/gpu/drm/bridge/microchip-lvds.c
> +++ b/drivers/gpu/drm/bridge/microchip-lvds.c
> @@ -23,7 +23,6 @@
>  #include <drm/drm_atomic_helper.h>
>  #include <drm/drm_bridge.h>
>  #include <drm/drm_of.h>
> -#include <drm/drm_panel.h>
>  #include <drm/drm_print.h>
>  #include <drm/drm_probe_helper.h>
>  #include <drm/drm_simple_kms_helper.h>
> @@ -56,7 +55,6 @@ struct mchp_lvds {
>  	struct device *dev;
>  	void __iomem *regs;
>  	struct clk *pclk;
> -	struct drm_panel *panel;
>  	struct drm_bridge bridge;
>  	struct drm_bridge *panel_bridge;
>  };
> @@ -179,13 +177,8 @@ static int mchp_lvds_probe(struct platform_device *pdev)
>  			"can't find port point, please init lvds panel port!\n");
>  		return -ENODEV;
>  	}

The above code seems unneeded now, I think you can drop it too.

> -
> -	lvds->panel = of_drm_find_panel(port);
>  	of_node_put(port);
>  
> -	if (IS_ERR(lvds->panel))
> -		return -EPROBE_DEFER;
> -
>  	lvds->panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
>  
>  	if (IS_ERR(lvds->panel_bridge))

-- 
Regards,

Laurent Pinchart

Re: [PATCH v4 1/3] drm/bridge: microchip-lvds: drop unused drm_panel

Posted by Dharma.B@microchip.com 3 months, 2 weeks ago

On 24/06/25 4:12 pm, Laurent Pinchart wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> On Tue, Jun 24, 2025 at 02:54:14PM +0530, Dharma Balasubiramani wrote:
>> Drop the drm_panel field of the mchp_lvds struct as it is unused.
>>
>> Signed-off-by: Dharma Balasubiramani <dharma.b@microchip.com>
>> ---
>>   drivers/gpu/drm/bridge/microchip-lvds.c | 7 -------
>>   1 file changed, 7 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/bridge/microchip-lvds.c b/drivers/gpu/drm/bridge/microchip-lvds.c
>> index 9f4ff82bc6b4..42751124b868 100644
>> --- a/drivers/gpu/drm/bridge/microchip-lvds.c
>> +++ b/drivers/gpu/drm/bridge/microchip-lvds.c
>> @@ -23,7 +23,6 @@
>>   #include <drm/drm_atomic_helper.h>
>>   #include <drm/drm_bridge.h>
>>   #include <drm/drm_of.h>
>> -#include <drm/drm_panel.h>
>>   #include <drm/drm_print.h>
>>   #include <drm/drm_probe_helper.h>
>>   #include <drm/drm_simple_kms_helper.h>
>> @@ -56,7 +55,6 @@ struct mchp_lvds {
>>        struct device *dev;
>>        void __iomem *regs;
>>        struct clk *pclk;
>> -     struct drm_panel *panel;
>>        struct drm_bridge bridge;
>>        struct drm_bridge *panel_bridge;
>>   };
>> @@ -179,13 +177,8 @@ static int mchp_lvds_probe(struct platform_device *pdev)
>>                        "can't find port point, please init lvds panel port!\n");
>>                return -ENODEV;
>>        }
> 
> The above code seems unneeded now, I think you can drop it too.

Yes, I considered removing it as well. However, I was wondering if it 
might still be valuable to return early when the endpoint isn't found, 
to clearly indicate that the panel port is missing.

> 
>> -
>> -     lvds->panel = of_drm_find_panel(port);
>>        of_node_put(port);
>>
>> -     if (IS_ERR(lvds->panel))
>> -             return -EPROBE_DEFER;
>> -
>>        lvds->panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
>>
>>        if (IS_ERR(lvds->panel_bridge))
> 
> --
> Regards,
> 
> Laurent Pinchart


-- 
With Best Regards,
Dharma B.

Re: [PATCH v4 1/3] drm/bridge: microchip-lvds: drop unused drm_panel

Posted by Laurent Pinchart 3 months, 2 weeks ago

On Tue, Jun 24, 2025 at 10:46:26AM +0000, Dharma.B@microchip.com wrote:
> On 24/06/25 4:12 pm, Laurent Pinchart wrote:
> > On Tue, Jun 24, 2025 at 02:54:14PM +0530, Dharma Balasubiramani wrote:
> >> Drop the drm_panel field of the mchp_lvds struct as it is unused.
> >>
> >> Signed-off-by: Dharma Balasubiramani <dharma.b@microchip.com>
> >> ---
> >>   drivers/gpu/drm/bridge/microchip-lvds.c | 7 -------
> >>   1 file changed, 7 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/bridge/microchip-lvds.c b/drivers/gpu/drm/bridge/microchip-lvds.c
> >> index 9f4ff82bc6b4..42751124b868 100644
> >> --- a/drivers/gpu/drm/bridge/microchip-lvds.c
> >> +++ b/drivers/gpu/drm/bridge/microchip-lvds.c
> >> @@ -23,7 +23,6 @@
> >>   #include <drm/drm_atomic_helper.h>
> >>   #include <drm/drm_bridge.h>
> >>   #include <drm/drm_of.h>
> >> -#include <drm/drm_panel.h>
> >>   #include <drm/drm_print.h>
> >>   #include <drm/drm_probe_helper.h>
> >>   #include <drm/drm_simple_kms_helper.h>
> >> @@ -56,7 +55,6 @@ struct mchp_lvds {
> >>        struct device *dev;
> >>        void __iomem *regs;
> >>        struct clk *pclk;
> >> -     struct drm_panel *panel;
> >>        struct drm_bridge bridge;
> >>        struct drm_bridge *panel_bridge;
> >>   };
> >> @@ -179,13 +177,8 @@ static int mchp_lvds_probe(struct platform_device *pdev)
> >>                        "can't find port point, please init lvds panel port!\n");
> >>                return -ENODEV;
> >>        }
> > 
> > The above code seems unneeded now, I think you can drop it too.
> 
> Yes, I considered removing it as well. However, I was wondering if it 
> might still be valuable to return early when the endpoint isn't found, 
> to clearly indicate that the panel port is missing.

That error is covered by the devm_drm_of_get_bridge() call below, so I
think you can drop the code above.

> >> -
> >> -     lvds->panel = of_drm_find_panel(port);
> >>        of_node_put(port);
> >>
> >> -     if (IS_ERR(lvds->panel))
> >> -             return -EPROBE_DEFER;
> >> -
> >>        lvds->panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
> >>
> >>        if (IS_ERR(lvds->panel_bridge))

-- 
Regards,

Laurent Pinchart

Re: [PATCH v4 1/3] drm/bridge: microchip-lvds: drop unused drm_panel

Posted by Dharma.B@microchip.com 3 months, 2 weeks ago

On 24/06/25 4:20 pm, Laurent Pinchart wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> On Tue, Jun 24, 2025 at 10:46:26AM +0000, Dharma.B@microchip.com wrote:
>> On 24/06/25 4:12 pm, Laurent Pinchart wrote:
>>> On Tue, Jun 24, 2025 at 02:54:14PM +0530, Dharma Balasubiramani wrote:
>>>> Drop the drm_panel field of the mchp_lvds struct as it is unused.
>>>>
>>>> Signed-off-by: Dharma Balasubiramani <dharma.b@microchip.com>
>>>> ---
>>>>    drivers/gpu/drm/bridge/microchip-lvds.c | 7 -------
>>>>    1 file changed, 7 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/bridge/microchip-lvds.c b/drivers/gpu/drm/bridge/microchip-lvds.c
>>>> index 9f4ff82bc6b4..42751124b868 100644
>>>> --- a/drivers/gpu/drm/bridge/microchip-lvds.c
>>>> +++ b/drivers/gpu/drm/bridge/microchip-lvds.c
>>>> @@ -23,7 +23,6 @@
>>>>    #include <drm/drm_atomic_helper.h>
>>>>    #include <drm/drm_bridge.h>
>>>>    #include <drm/drm_of.h>
>>>> -#include <drm/drm_panel.h>
>>>>    #include <drm/drm_print.h>
>>>>    #include <drm/drm_probe_helper.h>
>>>>    #include <drm/drm_simple_kms_helper.h>
>>>> @@ -56,7 +55,6 @@ struct mchp_lvds {
>>>>         struct device *dev;
>>>>         void __iomem *regs;
>>>>         struct clk *pclk;
>>>> -     struct drm_panel *panel;
>>>>         struct drm_bridge bridge;
>>>>         struct drm_bridge *panel_bridge;
>>>>    };
>>>> @@ -179,13 +177,8 @@ static int mchp_lvds_probe(struct platform_device *pdev)
>>>>                         "can't find port point, please init lvds panel port!\n");
>>>>                 return -ENODEV;
>>>>         }
>>>
>>> The above code seems unneeded now, I think you can drop it too.
>>
>> Yes, I considered removing it as well. However, I was wondering if it
>> might still be valuable to return early when the endpoint isn't found,
>> to clearly indicate that the panel port is missing.
> 
> That error is covered by the devm_drm_of_get_bridge() call below, so I
> think you can drop the code above.

Sure, I will drop the device node "port" as well.

> 
>>>> -
>>>> -     lvds->panel = of_drm_find_panel(port);
>>>>         of_node_put(port);
>>>>
>>>> -     if (IS_ERR(lvds->panel))
>>>> -             return -EPROBE_DEFER;
>>>> -
>>>>         lvds->panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
>>>>
>>>>         if (IS_ERR(lvds->panel_bridge))
> 
> --
> Regards,
> 
> Laurent Pinchart


-- 
With Best Regards,
Dharma B.