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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: Tian Tao <tiantao6@hisilicon.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/1606901212-8214-3-git-send-email-tiantao6@hisilicon.com
master
Tian Tao 2020-12-02 17:26:51 +08:00
parent 770729f77d
commit d96bc380a5
2 changed files with 33 additions and 1 deletions
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32
drivers/gpu/drm/drm_irq.c
View File

@ -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)

2
include/drm/drm_irq.h
View File

@ -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