[PATCH v2 4/8] drm/fb-helper: Add .last_close and .output_poll_changed helpers

[Noralf Trønnes]

This adds helpers for the drm_driver->last_close and the
drm_mode_config_funcs->output_poll_changed callbacks.

Signed-off-by: Noralf Trønnes <noralf at tronnes.org>
---
 drivers/gpu/drm/drm_fb_helper.c | 32 ++++++++++++++++++++++++++++++++
 include/drm/drm_fb_helper.h     | 10 ++++++++++
 2 files changed, 42 insertions(+)

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 166535da9a9b..897be5304135 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -226,6 +226,38 @@ void drm_fb_helper_simple_fini(struct drm_device *dev)
 }
 EXPORT_SYMBOL_GPL(drm_fb_helper_simple_fini);
 
+/**
+ * drm_fb_helper_lastclose - DRM driver lastclose helper for fbdev emulation
+ * @dev: DRM device
+ *
+ * This function can be used as the &drm_driver->lastclose callback for drivers
+ * that only need to call drm_fb_helper_restore_fbdev_mode_unlocked().
+ *
+ * Note: &drm_device->fbdev needs to be set.
+ */
+void drm_fb_helper_lastclose(struct drm_device *dev)
+{
+	drm_fb_helper_restore_fbdev_mode_unlocked(dev->fbdev);
+}
+EXPORT_SYMBOL(drm_fb_helper_lastclose);
+
+/**
+ * drm_fb_helper_output_poll_changed - DRM mode config \.output_poll_changed
+ *                                     helper for fbdev emulation
+ * @dev: DRM device
+ *
+ * This function can be used as the
+ * &drm_mode_config_funcs.output_poll_changed callback for drivers that only
+ * need to call drm_fb_helper_hotplug_event().
+ *
+ * Note: &drm_device->fbdev needs to be set.
+ */
+void drm_fb_helper_output_poll_changed(struct drm_device *dev)
+{
+	drm_fb_helper_hotplug_event(dev->fbdev);
+}
+EXPORT_SYMBOL(drm_fb_helper_output_poll_changed);
+
 #define drm_fb_helper_for_each_connector(fbh, i__) \
 	for (({ lockdep_assert_held(&(fbh)->lock); }), \
 	     i__ = 0; i__ < (fbh)->connector_count; i__++)
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 6503f4c3e3ef..2558425e29e5 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -246,6 +246,8 @@ int drm_fb_helper_simple_init(struct drm_device *dev,
 			      const struct drm_fb_helper_funcs *funcs,
 			      unsigned int bpp, int max_conn);
 void drm_fb_helper_simple_fini(struct drm_device *dev);
+void drm_fb_helper_lastclose(struct drm_device *dev);
+void drm_fb_helper_output_poll_changed(struct drm_device *dev);
 void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper,
 			   const struct drm_fb_helper_funcs *funcs);
 int drm_fb_helper_init(struct drm_device *dev,
@@ -328,6 +330,14 @@ static inline void drm_fb_helper_simple_fini(struct drm_device *dev)
 {
 }
 
+static inline void drm_fb_helper_lastclose(struct drm_device *dev)
+{
+}
+
+static inline void drm_fb_helper_output_poll_changed(struct drm_device *dev)
+{
+}
+
 static inline void drm_fb_helper_prepare(struct drm_device *dev,
 					struct drm_fb_helper *helper,
 					const struct drm_fb_helper_funcs *funcs)
-- 
2.14.2