[PATCH 2/7] drm: return if changed in drm_helper_hpd_irq_event()

[Marc-André Lureau]

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

Signed-off-by: Marc-Andr? Lureau <marcandre.lureau at redhat.com>
---
 drivers/gpu/drm/drm_crtc_helper.c | 6 ++++--
 include/drm/drm_crtc_helper.h     | 2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc_helper.c 
b/drivers/gpu/drm/drm_crtc_helper.c
index 6a64749..8712bdc 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -1074,14 +1074,14 @@ 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) {
@@ -1106,5 +1106,7 @@ 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);
diff --git a/include/drm/drm_crtc_helper.h b/include/drm/drm_crtc_helper.h
index f43d556..ef6ad3a 100644
--- a/include/drm/drm_crtc_helper.h
+++ b/include/drm/drm_crtc_helper.h
@@ -163,7 +163,7 @@ static inline void drm_connector_helper_add(struct 
drm_connector *connector,
 extern int drm_helper_resume_force_mode(struct drm_device *dev);
 extern void drm_kms_helper_poll_init(struct drm_device *dev);
 extern void drm_kms_helper_poll_fini(struct drm_device *dev);
-extern void drm_helper_hpd_irq_event(struct drm_device *dev);
+extern bool drm_helper_hpd_irq_event(struct drm_device *dev);
 extern void drm_kms_helper_hotplug_event(struct drm_device *dev);

 extern void drm_kms_helper_poll_disable(struct drm_device *dev);
-- 
1.8.3.1