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[PATCH v8 1/8] drm/etnaviv: add a dedicated function to register an irq handler

Sui Jingfeng posted 8 patches 2 years, 8 months ago
[PATCH v8 1/8] drm/etnaviv: add a dedicated function to register an irq handler
Posted by Sui Jingfeng 2 years, 8 months ago 
From: Sui Jingfeng <suijingfeng@loongson.cn>

Because getting IRQ from a device is platform-dependent, PCI devices have
different methods for getting an IRQ. This patch is a preparation patch to
extend the driver for the PCI device support.

Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
---
 drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 34 ++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index de8c9894967c..b9c12d3145a2 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -1817,6 +1817,29 @@ static const struct of_device_id etnaviv_gpu_match[] = {
 };
 MODULE_DEVICE_TABLE(of, etnaviv_gpu_match);
 
+static int etnaviv_gpu_register_irq(struct etnaviv_gpu *gpu, int irq)
+{
+	struct device *dev = gpu->dev;
+	int err;
+
+	if (irq < 0) {
+		dev_err(dev, "failed to get irq: %d\n", irq);
+		return irq;
+	}
+
+	err = devm_request_irq(dev, irq, irq_handler, 0, dev_name(dev), gpu);
+	if (err) {
+		dev_err(dev, "failed to request irq %u: %d\n", irq, err);
+		return err;
+	}
+
+	gpu->irq = irq;
+
+	dev_info(dev, "irq(%d) handler registered\n", irq);
+
+	return 0;
+}
+
 static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -1837,16 +1860,9 @@ static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
 		return PTR_ERR(gpu->mmio);
 
 	/* Get Interrupt: */
-	gpu->irq = platform_get_irq(pdev, 0);
-	if (gpu->irq < 0)
-		return gpu->irq;
-
-	err = devm_request_irq(&pdev->dev, gpu->irq, irq_handler, 0,
-			       dev_name(gpu->dev), gpu);
-	if (err) {
-		dev_err(dev, "failed to request IRQ%u: %d\n", gpu->irq, err);
+	err = etnaviv_gpu_register_irq(gpu, platform_get_irq(pdev, 0));
+	if (err)
 		return err;
-	}
 
 	/* Get Clocks: */
 	gpu->clk_reg = devm_clk_get_optional(&pdev->dev, "reg");
-- 
2.25.1
Re: [PATCH v8 1/8] drm/etnaviv: add a dedicated function to register an irq handler
Posted by Bjorn Helgaas 2 years, 8 months ago 
On Wed, Jun 07, 2023 at 06:55:44PM +0800, Sui Jingfeng wrote:
> From: Sui Jingfeng <suijingfeng@loongson.cn>
> 
> Because getting IRQ from a device is platform-dependent, PCI devices have
> different methods for getting an IRQ. This patch is a preparation patch to
> extend the driver for the PCI device support.
> 
> Cc: Lucas Stach <l.stach@pengutronix.de>
> Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
> Cc: Philipp Zabel <p.zabel@pengutronix.de>
> Cc: Bjorn Helgaas <bhelgaas@google.com>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
> ---
>  drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 34 ++++++++++++++++++++-------
>  1 file changed, 25 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
> index de8c9894967c..b9c12d3145a2 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
> @@ -1817,6 +1817,29 @@ static const struct of_device_id etnaviv_gpu_match[] = {
>  };
>  MODULE_DEVICE_TABLE(of, etnaviv_gpu_match);
>  
> +static int etnaviv_gpu_register_irq(struct etnaviv_gpu *gpu, int irq)
> +{
> +	struct device *dev = gpu->dev;
> +	int err;
> +
> +	if (irq < 0) {
> +		dev_err(dev, "failed to get irq: %d\n", irq);

Isn't this message redundant because platform_get_irq() already
emitted a message for this case?

> +		return irq;
> +	}
> +
> +	err = devm_request_irq(dev, irq, irq_handler, 0, dev_name(dev), gpu);
> +	if (err) {
> +		dev_err(dev, "failed to request irq %u: %d\n", irq, err);
> +		return err;
> +	}
> +
> +	gpu->irq = irq;
> +
> +	dev_info(dev, "irq(%d) handler registered\n", irq);
> +
> +	return 0;
> +}
> +
>  static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
> @@ -1837,16 +1860,9 @@ static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
>  		return PTR_ERR(gpu->mmio);
>  
>  	/* Get Interrupt: */
> -	gpu->irq = platform_get_irq(pdev, 0);
> -	if (gpu->irq < 0)
> -		return gpu->irq;
> -
> -	err = devm_request_irq(&pdev->dev, gpu->irq, irq_handler, 0,
> -			       dev_name(gpu->dev), gpu);
> -	if (err) {
> -		dev_err(dev, "failed to request IRQ%u: %d\n", gpu->irq, err);
> +	err = etnaviv_gpu_register_irq(gpu, platform_get_irq(pdev, 0));
> +	if (err)
>  		return err;
> -	}
>  
>  	/* Get Clocks: */
>  	gpu->clk_reg = devm_clk_get_optional(&pdev->dev, "reg");
> -- 
> 2.25.1
>
Re: [PATCH v8 1/8] drm/etnaviv: add a dedicated function to register an irq handler
Posted by Sui Jingfeng 2 years, 8 months ago 
Hi,

On 2023/6/9 01:25, Bjorn Helgaas wrote:
> On Wed, Jun 07, 2023 at 06:55:44PM +0800, Sui Jingfeng wrote:
>> From: Sui Jingfeng <suijingfeng@loongson.cn>
>>
>> Because getting IRQ from a device is platform-dependent, PCI devices have
>> different methods for getting an IRQ. This patch is a preparation patch to
>> extend the driver for the PCI device support.
>>
>> Cc: Lucas Stach <l.stach@pengutronix.de>
>> Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
>> Cc: Philipp Zabel <p.zabel@pengutronix.de>
>> Cc: Bjorn Helgaas <bhelgaas@google.com>
>> Cc: Daniel Vetter <daniel@ffwll.ch>
>> Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
>> ---
>>   drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 34 ++++++++++++++++++++-------
>>   1 file changed, 25 insertions(+), 9 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
>> index de8c9894967c..b9c12d3145a2 100644
>> --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
>> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
>> @@ -1817,6 +1817,29 @@ static const struct of_device_id etnaviv_gpu_match[] = {
>>   };
>>   MODULE_DEVICE_TABLE(of, etnaviv_gpu_match);
>>   
>> +static int etnaviv_gpu_register_irq(struct etnaviv_gpu *gpu, int irq)
>> +{
>> +	struct device *dev = gpu->dev;
>> +	int err;
>> +
>> +	if (irq < 0) {
>> +		dev_err(dev, "failed to get irq: %d\n", irq);
> Isn't this message redundant because platform_get_irq() already
> emitted a message for this case?
Indeed, will be fixed at version.
>> +		return irq;
>> +	}
>> +
>> +	err = devm_request_irq(dev, irq, irq_handler, 0, dev_name(dev), gpu);
>> +	if (err) {
>> +		dev_err(dev, "failed to request irq %u: %d\n", irq, err);
>> +		return err;
>> +	}
>> +
>> +	gpu->irq = irq;
>> +
>> +	dev_info(dev, "irq(%d) handler registered\n", irq);
>> +
>> +	return 0;
>> +}
>> +
>>   static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
>>   {
>>   	struct device *dev = &pdev->dev;
>> @@ -1837,16 +1860,9 @@ static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
>>   		return PTR_ERR(gpu->mmio);
>>   
>>   	/* Get Interrupt: */
>> -	gpu->irq = platform_get_irq(pdev, 0);
>> -	if (gpu->irq < 0)
>> -		return gpu->irq;
>> -
>> -	err = devm_request_irq(&pdev->dev, gpu->irq, irq_handler, 0,
>> -			       dev_name(gpu->dev), gpu);
>> -	if (err) {
>> -		dev_err(dev, "failed to request IRQ%u: %d\n", gpu->irq, err);
>> +	err = etnaviv_gpu_register_irq(gpu, platform_get_irq(pdev, 0));
>> +	if (err)
>>   		return err;
>> -	}
>>   
>>   	/* Get Clocks: */
>>   	gpu->clk_reg = devm_clk_get_optional(&pdev->dev, "reg");
>> -- 
>> 2.25.1
>>
-- 
Jingfeng

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