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drm/lease: Send a distinct uevent 

Sending the exact same hotplug event is not great uapi. Luckily the
only already merged implementation of leases (in the -modesetting
driver) doesn't care about what kind of uevent it gets, and
unconditionally processes both hotplug and lease changes. So we can
still adjust the uapi here.

But e.g. weston tries to filter stuff, and I guess others might want
to do that too. Try to make that possible. Cc: stable since it's uapi
adjustement that we want to roll out everywhere.

Michel Dänzer mentioned on irc that -amdgpu also has lease support. It
has the same code flow as -modesetting though, so we can still go
ahead.

v2: Mention -amdgpu (Michel)

Cc: Keith Packard <keithp@keithp.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: stable@vger.kernel.org
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181129094226.30591-1-daniel.vetter@ffwll.ch
hifive-unleashed-5.1
Daniel Vetter 2018-11-29 10:42:26 +01:00
parent 9765635b30
commit ce85882860
3 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/drm_internal.h
View File

@ -104,6 +104,8 @@ struct device *drm_sysfs_minor_alloc(struct drm_minor *minor);
int drm_sysfs_connector_add(struct drm_connector *connector);
void drm_sysfs_connector_remove(struct drm_connector *connector);
void drm_sysfs_lease_event(struct drm_device *dev);
/* drm_gem.c */
int drm_gem_init(struct drm_device *dev);
void drm_gem_destroy(struct drm_device *dev);

2
drivers/gpu/drm/drm_lease.c
View File

@ -296,7 +296,7 @@ void drm_lease_destroy(struct drm_master *master)
if (master->lessor) {
/* Tell the master to check the lessee list */
drm_sysfs_hotplug_event(dev);
drm_sysfs_lease_event(dev);
drm_master_put(&master->lessor);
}

10
drivers/gpu/drm/drm_sysfs.c
View File

@ -301,6 +301,16 @@ void drm_sysfs_connector_remove(struct drm_connector *connector)
connector->kdev = NULL;
}
void drm_sysfs_lease_event(struct drm_device *dev)
{
char *event_string = "LEASE=1";
char *envp[] = { event_string, NULL };
DRM_DEBUG("generating lease event\n");
kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp);
}
/**
* drm_sysfs_hotplug_event - generate a DRM uevent
* @dev: DRM device