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drm/sysfs: introduce drm_sysfs_connector_hotplug_event

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This function sends a hotplug uevent with a CONNECTOR property.

Signed-off-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211018084707.32253-2-contact@emersion.fr
This commit is contained in:
Simon Ser 2021-10-18 08:47:25 +00:00
parent 542cff7893
commit 0d6a8c5e96
2 changed files with 26 additions and 0 deletions
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25
drivers/gpu/drm/drm_sysfs.c
View File

@ -409,6 +409,31 @@ void drm_sysfs_hotplug_event(struct drm_device *dev)
}
EXPORT_SYMBOL(drm_sysfs_hotplug_event);
/**
* drm_sysfs_connector_hotplug_event - generate a DRM uevent for any connector
* change
* @connector: connector which has changed
*
* Send a uevent for the DRM connector specified by @connector. This will send
* a uevent with the properties HOTPLUG=1 and CONNECTOR.
*/
void drm_sysfs_connector_hotplug_event(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
char hotplug_str[] = "HOTPLUG=1", conn_id[21];
char *envp[] = { hotplug_str, conn_id, NULL };
snprintf(conn_id, sizeof(conn_id),
"CONNECTOR=%u", connector->base.id);
drm_dbg_kms(connector->dev,
"[CONNECTOR:%d:%s] generating connector hotplug event\n",
connector->base.id, connector->name);
kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp);
}
EXPORT_SYMBOL(drm_sysfs_connector_hotplug_event);
/**
* drm_sysfs_connector_status_event - generate a DRM uevent for connector
* property status change

1
include/drm/drm_sysfs.h
View File

@ -11,6 +11,7 @@ int drm_class_device_register(struct device *dev);
void drm_class_device_unregister(struct device *dev);
void drm_sysfs_hotplug_event(struct drm_device *dev);
void drm_sysfs_connector_hotplug_event(struct drm_connector *connector);
void drm_sysfs_connector_status_event(struct drm_connector *connector,
struct drm_property *property);
#endif