drm: return if changed in drm_helper_hpd_irq_event()

The caller may want to know whether the configuration was changed, and
if an hotplug event was sent.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 5fcb9d487672..55ea4ac6fd50 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -1131,14 +1131,14 @@ void drm_kms_helper_poll_fini(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_kms_helper_poll_fini);
 
-void drm_helper_hpd_irq_event(struct drm_device *dev)
+bool drm_helper_hpd_irq_event(struct drm_device *dev)
 {
         struct drm_connector *connector;
         enum drm_connector_status old_status;
         bool changed = false;
 
         if (!dev->mode_config.poll_enabled)
-                return;
+                return false;
 
         mutex_lock(&dev->mode_config.mutex);
         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
@@ -1163,5 +1163,7 @@ void drm_helper_hpd_irq_event(struct drm_device *dev)
 
         if (changed)
                 drm_kms_helper_hotplug_event(dev);
+
+        return changed;
 }
 EXPORT_SYMBOL(drm_helper_hpd_irq_event);