Commit d96bc380 authored by Tian Tao's avatar Tian Tao
Browse files

drm/irq: Add the new api to install irq 



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

Signed-off-by: default avatarTian Tao <tiantao6@hisilicon.com>
Reviewed-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/1606901212-8214-3-git-send-email-tiantao6@hisilicon.com
parent 770729f7

drivers/gpu/drm/drm_irq.c

+32 −0
Original line number Diff line number Diff line
@@ -214,6 +214,38 @@ int drm_irq_uninstall(struct drm_device *dev) 
}

EXPORT_SYMBOL(drm_irq_uninstall);



static void devm_drm_irq_uninstall(void *data)

{

	drm_irq_uninstall(data);

}



/**

 * devm_drm_irq_install - install IRQ handler

 * @dev: DRM device

 * @irq: IRQ number to install the handler for

 *

 * devm_drm_irq_install is a  help function of drm_irq_install.

 *

 * if the driver uses devm_drm_irq_install, there is no need

 * to call drm_irq_uninstall when the drm module get unloaded,

 * as this will done automagically.

 *

 * Returns:

 * Zero on success or a negative error code on failure.

 */

int devm_drm_irq_install(struct drm_device *dev, int irq)

{

	int ret;



	ret = drm_irq_install(dev, irq);

	if (ret)

		return ret;



	return devm_add_action_or_reset(dev->dev,

					devm_drm_irq_uninstall, dev);

}

EXPORT_SYMBOL(devm_drm_irq_install);



#if IS_ENABLED(CONFIG_DRM_LEGACY)

int drm_legacy_irq_control(struct drm_device *dev, void *data,

			   struct drm_file *file_priv)

include/drm/drm_irq.h

+1 −1
Original line number Diff line number Diff line
@@ -28,5 +28,5 @@ struct drm_device; 


int drm_irq_install(struct drm_device *dev, int irq);

int drm_irq_uninstall(struct drm_device *dev);



int devm_drm_irq_install(struct drm_device *dev, int irq);

#endif