diff mbox series

[v4] media: davinci: vpif: Use platform_get_irq_optional() to get the interrupt

Message ID 20220113104416.32352-1-prabhakar.mahadev-lad.rj@bp.renesas.com (mailing list archive)
State New, archived
Headers show
Series [v4] media: davinci: vpif: Use platform_get_irq_optional() to get the interrupt | expand

Commit Message

Lad Prabhakar Jan. 13, 2022, 10:44 a.m. UTC 
platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypasses the hierarchical setup and messes up the
irq chaining.

In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq_optional().

While at it, propagate error code in case devm_request_irq() fails
instead of returning -EINVAL.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
Hi All,

This patch is part of series [0], instead of resending the entire series
I am re-sending this alone patch after rebasing on patch series [1].

[0] https://patchwork.linuxtv.org/project/linux-media/list/?series=7073
[1] https://patchwork.linuxtv.org/project/linux-media/list/?series=7000

v3->v4
* Replaced loop with do while.

Cheers,
Prabhakar
---
 drivers/media/platform/davinci/vpif.c         | 18 ++++++++-----
 drivers/media/platform/davinci/vpif_capture.c | 27 +++++++++++--------
 drivers/media/platform/davinci/vpif_display.c | 24 ++++++++++-------
 3 files changed, 42 insertions(+), 27 deletions(-)

Comments

Lad, Prabhakar Jan. 26, 2022, 8:07 p.m. UTC | #1 
Hi Hans,

On Thu, Jan 13, 2022 at 10:44 AM Lad Prabhakar
<prabhakar.mahadev-lad.rj@bp.renesas.com> wrote:
>
> platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
> allocation of IRQ resources in DT core code, this causes an issue
> when using hierarchical interrupt domains using "interrupts" property
> in the node as this bypasses the hierarchical setup and messes up the
> irq chaining.
>
> In preparation for removal of static setup of IRQ resource from DT core
> code use platform_get_irq_optional().
>
> While at it, propagate error code in case devm_request_irq() fails
> instead of returning -EINVAL.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
> Hi All,
>
> This patch is part of series [0], instead of resending the entire series
> I am re-sending this alone patch after rebasing on patch series [1].
>
> [0] https://patchwork.linuxtv.org/project/linux-media/list/?series=7073
> [1] https://patchwork.linuxtv.org/project/linux-media/list/?series=7000
>
> v3->v4
> * Replaced loop with do while.
>
> Cheers,
> Prabhakar
> ---
>  drivers/media/platform/davinci/vpif.c         | 18 ++++++++-----
>  drivers/media/platform/davinci/vpif_capture.c | 27 +++++++++++--------
>  drivers/media/platform/davinci/vpif_display.c | 24 ++++++++++-------
>  3 files changed, 42 insertions(+), 27 deletions(-)
>
Gentle ping, just so that we don't miss out this patch.

Cheers,
Prabhakar

> diff --git a/drivers/media/platform/davinci/vpif.c b/drivers/media/platform/davinci/vpif.c
> index 03b4e51bb13a..97ef770266af 100644
> --- a/drivers/media/platform/davinci/vpif.c
> +++ b/drivers/media/platform/davinci/vpif.c
> @@ -20,8 +20,10 @@
>  #include <linux/err.h>
>  #include <linux/init.h>
>  #include <linux/io.h>
> +#include <linux/irq.h>
>  #include <linux/kernel.h>
>  #include <linux/module.h>
> +#include <linux/of.h>
>  #include <linux/platform_device.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/spinlock.h>
> @@ -437,11 +439,12 @@ static void vpif_pdev_release(struct device *dev)
>
>  static int vpif_probe(struct platform_device *pdev)
>  {
> -       static struct resource *res_irq;
> +       static struct resource res_irq;
>         struct platform_device *pdev_capture, *pdev_display;
>         struct device_node *endpoint = NULL;
>         struct vpif_data *data;
>         int ret;
> +       int irq;
>
>         vpif_base = devm_platform_ioremap_resource(pdev, 0);
>         if (IS_ERR(vpif_base))
> @@ -471,12 +474,13 @@ static int vpif_probe(struct platform_device *pdev)
>          * For DT platforms, manually create platform_devices for
>          * capture/display drivers.
>          */
> -       res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> -       if (!res_irq) {
> -               dev_warn(&pdev->dev, "Missing IRQ resource.\n");
> -               ret = -EINVAL;
> +       irq = platform_get_irq(pdev, 0);
> +       if (irq < 0) {
> +               ret = irq;
>                 goto err_put_rpm;
>         }
> +       res_irq = (struct resource)DEFINE_RES_IRQ_NAMED(irq, of_node_full_name(pdev->dev.of_node));
> +       res_irq.flags |= irq_get_trigger_type(irq);
>
>         pdev_capture = kzalloc(sizeof(*pdev_capture), GFP_KERNEL);
>         if (!pdev_capture) {
> @@ -486,7 +490,7 @@ static int vpif_probe(struct platform_device *pdev)
>
>         pdev_capture->name = "vpif_capture";
>         pdev_capture->id = -1;
> -       pdev_capture->resource = res_irq;
> +       pdev_capture->resource = &res_irq;
>         pdev_capture->num_resources = 1;
>         pdev_capture->dev.dma_mask = pdev->dev.dma_mask;
>         pdev_capture->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask;
> @@ -505,7 +509,7 @@ static int vpif_probe(struct platform_device *pdev)
>
>         pdev_display->name = "vpif_display";
>         pdev_display->id = -1;
> -       pdev_display->resource = res_irq;
> +       pdev_display->resource = &res_irq;
>         pdev_display->num_resources = 1;
>         pdev_display->dev.dma_mask = pdev->dev.dma_mask;
>         pdev_display->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask;
> diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
> index 8fe55374c5a3..bf76c5c83743 100644
> --- a/drivers/media/platform/davinci/vpif_capture.c
> +++ b/drivers/media/platform/davinci/vpif_capture.c
> @@ -1607,7 +1607,6 @@ static __init int vpif_probe(struct platform_device *pdev)
>  {
>         struct vpif_subdev_info *subdevdata;
>         struct i2c_adapter *i2c_adap;
> -       struct resource *res;
>         int subdev_count;
>         int res_idx = 0;
>         int i, err;
> @@ -1632,17 +1631,23 @@ static __init int vpif_probe(struct platform_device *pdev)
>                 goto vpif_free;
>         }
>
> -       while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
> -               err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
> -                                       IRQF_SHARED, VPIF_DRIVER_NAME,
> -                                       (void *)(&vpif_obj.dev[res_idx]->
> -                                       channel_id));
> -               if (err) {
> -                       err = -EINVAL;
> +       do {
> +               int irq;
> +
> +               err = platform_get_irq_optional(pdev, res_idx);
> +               if (err < 0 && err != -ENXIO)
>                         goto vpif_unregister;
> -               }
> -               res_idx++;
> -       }
> +               if (err > 0)
> +                       irq = err;
> +               else
> +                       break;
> +
> +               err = devm_request_irq(&pdev->dev, irq, vpif_channel_isr,
> +                                      IRQF_SHARED, VPIF_DRIVER_NAME,
> +                                      (void *)(&vpif_obj.dev[res_idx]->channel_id));
> +               if (err)
> +                       goto vpif_unregister;
> +       } while (++res_idx);
>
>         vpif_obj.config = pdev->dev.platform_data;
>
> diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
> index 59f6b782e104..fca148b66471 100644
> --- a/drivers/media/platform/davinci/vpif_display.c
> +++ b/drivers/media/platform/davinci/vpif_display.c
> @@ -1221,7 +1221,6 @@ static __init int vpif_probe(struct platform_device *pdev)
>  {
>         struct vpif_subdev_info *subdevdata;
>         struct i2c_adapter *i2c_adap;
> -       struct resource *res;
>         int subdev_count;
>         int res_idx = 0;
>         int i, err;
> @@ -1245,18 +1244,25 @@ static __init int vpif_probe(struct platform_device *pdev)
>                 goto vpif_free;
>         }
>
> -       while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
> -               err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
> -                                       IRQF_SHARED, VPIF_DRIVER_NAME,
> -                                       (void *)(&vpif_obj.dev[res_idx]->
> -                                       channel_id));
> +       do {
> +               int irq;
> +
> +               err = platform_get_irq_optional(pdev, res_idx);
> +               if (err < 0 && err != -ENXIO)
> +                       goto vpif_unregister;
> +               if (err > 0)
> +                       irq = err;
> +               else
> +                       break;
> +
> +               err = devm_request_irq(&pdev->dev, irq, vpif_channel_isr,
> +                                      IRQF_SHARED, VPIF_DRIVER_NAME,
> +                                      (void *)(&vpif_obj.dev[res_idx]->channel_id));
>                 if (err) {
> -                       err = -EINVAL;
>                         vpif_err("VPIF IRQ request failed\n");
>                         goto vpif_unregister;
>                 }
> -               res_idx++;
> -       }
> +       } while (++res_idx);
>
>         vpif_obj.config = pdev->dev.platform_data;
>         subdev_count = vpif_obj.config->subdev_count;
> --
> 2.17.1
>
diff mbox series

Patch

diff --git a/drivers/media/platform/davinci/vpif.c b/drivers/media/platform/davinci/vpif.c
index 03b4e51bb13a..97ef770266af 100644
--- a/drivers/media/platform/davinci/vpif.c
+++ b/drivers/media/platform/davinci/vpif.c
@@ -20,8 +20,10 @@ 
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/io.h>
+#include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/spinlock.h>
@@ -437,11 +439,12 @@  static void vpif_pdev_release(struct device *dev)
 
 static int vpif_probe(struct platform_device *pdev)
 {
-	static struct resource *res_irq;
+	static struct resource res_irq;
 	struct platform_device *pdev_capture, *pdev_display;
 	struct device_node *endpoint = NULL;
 	struct vpif_data *data;
 	int ret;
+	int irq;
 
 	vpif_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(vpif_base))
@@ -471,12 +474,13 @@  static int vpif_probe(struct platform_device *pdev)
 	 * For DT platforms, manually create platform_devices for
 	 * capture/display drivers.
 	 */
-	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!res_irq) {
-		dev_warn(&pdev->dev, "Missing IRQ resource.\n");
-		ret = -EINVAL;
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		ret = irq;
 		goto err_put_rpm;
 	}
+	res_irq = (struct resource)DEFINE_RES_IRQ_NAMED(irq, of_node_full_name(pdev->dev.of_node));
+	res_irq.flags |= irq_get_trigger_type(irq);
 
 	pdev_capture = kzalloc(sizeof(*pdev_capture), GFP_KERNEL);
 	if (!pdev_capture) {
@@ -486,7 +490,7 @@  static int vpif_probe(struct platform_device *pdev)
 
 	pdev_capture->name = "vpif_capture";
 	pdev_capture->id = -1;
-	pdev_capture->resource = res_irq;
+	pdev_capture->resource = &res_irq;
 	pdev_capture->num_resources = 1;
 	pdev_capture->dev.dma_mask = pdev->dev.dma_mask;
 	pdev_capture->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask;
@@ -505,7 +509,7 @@  static int vpif_probe(struct platform_device *pdev)
 
 	pdev_display->name = "vpif_display";
 	pdev_display->id = -1;
-	pdev_display->resource = res_irq;
+	pdev_display->resource = &res_irq;
 	pdev_display->num_resources = 1;
 	pdev_display->dev.dma_mask = pdev->dev.dma_mask;
 	pdev_display->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask;
diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index 8fe55374c5a3..bf76c5c83743 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -1607,7 +1607,6 @@  static __init int vpif_probe(struct platform_device *pdev)
 {
 	struct vpif_subdev_info *subdevdata;
 	struct i2c_adapter *i2c_adap;
-	struct resource *res;
 	int subdev_count;
 	int res_idx = 0;
 	int i, err;
@@ -1632,17 +1631,23 @@  static __init int vpif_probe(struct platform_device *pdev)
 		goto vpif_free;
 	}
 
-	while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
-		err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
-					IRQF_SHARED, VPIF_DRIVER_NAME,
-					(void *)(&vpif_obj.dev[res_idx]->
-					channel_id));
-		if (err) {
-			err = -EINVAL;
+	do {
+		int irq;
+
+		err = platform_get_irq_optional(pdev, res_idx);
+		if (err < 0 && err != -ENXIO)
 			goto vpif_unregister;
-		}
-		res_idx++;
-	}
+		if (err > 0)
+			irq = err;
+		else
+			break;
+
+		err = devm_request_irq(&pdev->dev, irq, vpif_channel_isr,
+				       IRQF_SHARED, VPIF_DRIVER_NAME,
+				       (void *)(&vpif_obj.dev[res_idx]->channel_id));
+		if (err)
+			goto vpif_unregister;
+	} while (++res_idx);
 
 	vpif_obj.config = pdev->dev.platform_data;
 
diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
index 59f6b782e104..fca148b66471 100644
--- a/drivers/media/platform/davinci/vpif_display.c
+++ b/drivers/media/platform/davinci/vpif_display.c
@@ -1221,7 +1221,6 @@  static __init int vpif_probe(struct platform_device *pdev)
 {
 	struct vpif_subdev_info *subdevdata;
 	struct i2c_adapter *i2c_adap;
-	struct resource *res;
 	int subdev_count;
 	int res_idx = 0;
 	int i, err;
@@ -1245,18 +1244,25 @@  static __init int vpif_probe(struct platform_device *pdev)
 		goto vpif_free;
 	}
 
-	while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
-		err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
-					IRQF_SHARED, VPIF_DRIVER_NAME,
-					(void *)(&vpif_obj.dev[res_idx]->
-					channel_id));
+	do {
+		int irq;
+
+		err = platform_get_irq_optional(pdev, res_idx);
+		if (err < 0 && err != -ENXIO)
+			goto vpif_unregister;
+		if (err > 0)
+			irq = err;
+		else
+			break;
+
+		err = devm_request_irq(&pdev->dev, irq, vpif_channel_isr,
+				       IRQF_SHARED, VPIF_DRIVER_NAME,
+				       (void *)(&vpif_obj.dev[res_idx]->channel_id));
 		if (err) {
-			err = -EINVAL;
 			vpif_err("VPIF IRQ request failed\n");
 			goto vpif_unregister;
 		}
-		res_idx++;
-	}
+	} while (++res_idx);
 
 	vpif_obj.config = pdev->dev.platform_data;
 	subdev_count = vpif_obj.config->subdev_count;