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A userspace can register to this event and do some postprocessing if supported by native driver. An example usage has been added into AMDGPU driver in this series. Cc: Alexander Deucher Cc: Christian Koenig Signed-off-by: Shashank Sharma --- drivers/gpu/drm/drm_sysfs.c | 19 +++++++++++++++++++ include/drm/drm_sysfs.h | 1 + 2 files changed, 20 insertions(+) diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index 968a9560b4aa..0d721d536bb1 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -343,6 +343,25 @@ void drm_sysfs_hotplug_event(struct drm_device *dev) } EXPORT_SYMBOL(drm_sysfs_hotplug_event); +/** + * drm_sysfs_gpu_reset_event - generate a GPU reset uevent + * @dev: DRM device + * + * Send a uevent for the DRM device specified by @dev. This event will + * inform userspace that a GPU reset happened, and it can do some + * postprocessing (eg: data collecting from a trace event). + */ +void drm_sysfs_gpu_reset_event(struct drm_device *dev) +{ + char *event_string = "RESET=1"; + char *envp[] = { event_string, NULL }; + + DRM_DEBUG("generating gpu reset event\n"); + + kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp); +} +EXPORT_SYMBOL(drm_sysfs_gpu_reset_event); + /** * drm_sysfs_connector_status_event - generate a DRM uevent for connector * property status change diff --git a/include/drm/drm_sysfs.h b/include/drm/drm_sysfs.h index d454ef617b2c..312956a0a1bf 100644 --- a/include/drm/drm_sysfs.h +++ b/include/drm/drm_sysfs.h @@ -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_gpu_reset_event(struct drm_device *dev); void drm_sysfs_connector_status_event(struct drm_connector *connector, struct drm_property *property); #endif -- 2.32.0