drm: run the hpd irq event code directly

All drivers already have a work item to run the hpd code, so we don't
need to launch a new one in the helper code. Dave Airlie mentioned
that the cancel+re-queue might paper over DP related hpd ping-pongs,
hence why this is split out.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_crtc_helper.c

@@ -1019,12 +1019,9 @@ void drm_kms_helper_poll_enable(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_kms_helper_poll_enable);
 
-static void hpd_irq_event_execute(struct work_struct *work);
-
 void drm_kms_helper_poll_init(struct drm_device *dev)
 {
 	INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
-	INIT_DELAYED_WORK(&dev->mode_config.hpd_irq_work, hpd_irq_event_execute);
 	dev->mode_config.poll_enabled = true;
 
 	drm_kms_helper_poll_enable(dev);
@@ -1037,10 +1034,8 @@ void drm_kms_helper_poll_fini(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_kms_helper_poll_fini);
 
-static void hpd_irq_event_execute(struct work_struct *work)
+void drm_helper_hpd_irq_event(struct drm_device *dev)
 {
-	struct delayed_work *delayed_work = to_delayed_work(work);
-	struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.hpd_irq_work);
 	struct drm_connector *connector;
 	enum drm_connector_status old_status;
 	bool changed = false;
@@ -1071,11 +1066,4 @@ static void hpd_irq_event_execute(struct work_struct *work)
 	if (changed)
 		drm_kms_helper_hotplug_event(dev);
 }
-
-void drm_helper_hpd_irq_event(struct drm_device *dev)
-{
-	cancel_delayed_work(&dev->mode_config.hpd_irq_work);
-	if (drm_kms_helper_poll)
-		schedule_delayed_work(&dev->mode_config.hpd_irq_work, 0);
-}
 EXPORT_SYMBOL(drm_helper_hpd_irq_event);

include/drm/drm_crtc.h

@@ -793,7 +793,6 @@ struct drm_mode_config {
 	/* output poll support */
 	bool poll_enabled;
 	struct delayed_work output_poll_work;
-	struct delayed_work hpd_irq_work;
 
 	/* pointers to standard properties */
 	struct list_head property_blob_list;