On Thu, Nov 29, 2018 at 10:42 AM Daniel Vetter daniel.vetter@ffwll.ch wrote:

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.

Cc: Keith Packard keithp@keithp.com Cc: Dave Airlie airlied@redhat.com Cc: stable@vger.kernel.org Signed-off-by: Daniel Vetter daniel.vetter@intel.com

Michel said on irc that -amdgpu also supports leases already, but it has the same logic as -modesetting, so would be fine too. -Daniel

---

drivers/gpu/drm/drm_internal.h | 2 ++ drivers/gpu/drm/drm_lease.c | 2 +- drivers/gpu/drm/drm_sysfs.c | 10 ++++++++++ 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h index c7a7d7ce5d1c..d9caf205e0b3 100644 --- a/drivers/gpu/drm/drm_internal.h +++ b/drivers/gpu/drm/drm_internal.h @@ -99,6 +99,8 @@ 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); diff --git a/drivers/gpu/drm/drm_lease.c b/drivers/gpu/drm/drm_lease.c index 3650d3c46718..99cba8ea5d82 100644 --- a/drivers/gpu/drm/drm_lease.c +++ b/drivers/gpu/drm/drm_lease.c @@ -292,7 +292,7 @@ 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);
    }
  
  

diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index b3c1daad1169..ecb7b33002bb 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -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

-- 2.19.1