[PATCH v2] drm: Add the new api to install irq

[Tian Tao]

Add new api devm_drm_irq_install() to register interrupts,
no need to call drm_irq_uninstall() when the drm module is removed.

v2:
fixed the wrong parameter.

Signed-off-by: Tian Tao <tiantao6 at hisilicon.com>
---
 drivers/gpu/drm/drm_drv.c | 23 +++++++++++++++++++++++
 include/drm/drm_drv.h     |  3 ++-
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index cd162d4..0fe5243 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -39,6 +39,7 @@
 #include <drm/drm_color_mgmt.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_file.h>
+#include <drm/drm_irq.h>
 #include <drm/drm_managed.h>
 #include <drm/drm_mode_object.h>
 #include <drm/drm_print.h>
@@ -678,6 +679,28 @@ static int devm_drm_dev_init(struct device *parent,
 	return ret;
 }
 
+static void devm_drm_dev_irq_uninstall(void *data)
+{
+	drm_irq_uninstall(data);
+}
+
+int devm_drm_irq_install(struct device *parent,
+			 struct drm_device *dev, int irq)
+{
+	int ret;
+
+	ret = drm_irq_install(dev, irq);
+	if (ret)
+		return ret;
+
+	ret = devm_add_action(parent, devm_drm_dev_irq_uninstall, dev);
+	if (ret)
+		devm_drm_dev_irq_uninstall(dev);
+
+	return ret;
+}
+EXPORT_SYMBOL(devm_drm_irq_install);
+
 void *__devm_drm_dev_alloc(struct device *parent, struct drm_driver *driver,
 			   size_t size, size_t offset)
 {
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index 0230762..fec1776 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -513,7 +513,8 @@ struct drm_driver {
 
 void *__devm_drm_dev_alloc(struct device *parent, struct drm_driver *driver,
 			   size_t size, size_t offset);
-
+int devm_drm_irq_install(struct device *parent, struct drm_device *dev,
+			 int irq);
 /**
  * devm_drm_dev_alloc - Resource managed allocation of a &drm_device instance
  * @parent: Parent device object
-- 
2.7.4