From 0d6a8c5e96833f644b91528de6a3a4398214fb9c Mon Sep 17 00:00:00 2001 From: Simon Ser Date: Mon, 18 Oct 2021 08:47:25 +0000 Subject: drm/sysfs: introduce drm_sysfs_connector_hotplug_event This function sends a hotplug uevent with a CONNECTOR property. Signed-off-by: Simon Ser Reviewed-by: Sam Ravnborg Acked-by: Harry Wentland Acked-by: Pekka Paalanen Link: https://patchwork.freedesktop.org/patch/msgid/20211018084707.32253-2-contact@emersion.fr --- drivers/gpu/drm/drm_sysfs.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'drivers/gpu/drm/drm_sysfs.c') diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index 76ff6ec3421b..430e00b16eec 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -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 -- cgit v1.2.3