From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
Date: Mon, 30 Oct 2017 16:39:39 +0100
Subject: drm/fb-helper: Add .last_close and .output_poll_changed helpers
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Git-commit: 304a4f6accac4add4967fc062069fc8421c46aae
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

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@tronnes.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20171030153951.56269-4-noralf@tronnes.org

Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/drm_fb_helper.c |   28 ++++++++++++++++++++++++++++
 include/drm/drm_fb_helper.h     |   11 +++++++++++
 2 files changed, 39 insertions(+)

--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -2641,6 +2641,34 @@ int drm_fb_helper_hotplug_event(struct d
 }
 EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
 
+/**
+ * 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().
+ */
+void drm_fb_helper_lastclose(struct drm_device *dev)
+{
+	drm_fb_helper_restore_fbdev_mode_unlocked(dev->fb_helper);
+}
+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().
+ */
+void drm_fb_helper_output_poll_changed(struct drm_device *dev)
+{
+	drm_fb_helper_hotplug_event(dev->fb_helper);
+}
+EXPORT_SYMBOL(drm_fb_helper_output_poll_changed);
+
 /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
  * but the module doesn't depend on any fb console symbols.  At least
  * attempt to load fbcon to avoid leaving the system without a usable console.
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -310,6 +310,9 @@ drm_pick_cmdline_mode(struct drm_fb_help
 int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector);
 int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
 				       struct drm_connector *connector);
+
+void drm_fb_helper_lastclose(struct drm_device *dev);
+void drm_fb_helper_output_poll_changed(struct drm_device *dev);
 #else
 static inline void drm_fb_helper_prepare(struct drm_device *dev,
 					struct drm_fb_helper *helper,
@@ -507,6 +510,14 @@ drm_fb_helper_remove_one_connector(struc
 	return 0;
 }
 
+static inline void drm_fb_helper_lastclose(struct drm_device *dev)
+{
+}
+
+static inline void drm_fb_helper_output_poll_changed(struct drm_device *dev)
+{
+}
+
 #endif
 
 static inline int