gpu/drm/exynos: Convert drm_atomic_helper_suspend/resume()

convert drm_atomic_helper_suspend/resume() to use
drm_mode_config_helper_suspend/resume().

exynos_drm_fbdev_suspend/resume can be removed
as drm_mode_config_helper_suspend/resume has
implement the same in generic way.

Remove suspend_state from exynos_drm_private
struct as it is no more useful.
Signed-off-by: Ajit Negi <ajitn.linux@gmail.com>
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_drm_drv.c

@@ -149,37 +149,15 @@ static struct drm_driver exynos_drm_driver = {
 static int exynos_drm_suspend(struct device *dev)
 {
 	struct drm_device *drm_dev = dev_get_drvdata(dev);
-	struct exynos_drm_private *private;
-
-	if (!drm_dev)
-		return 0;
 
-	private = drm_dev->dev_private;
-
-	drm_kms_helper_poll_disable(drm_dev);
-	exynos_drm_fbdev_suspend(drm_dev);
-	private->suspend_state = drm_atomic_helper_suspend(drm_dev);
-	if (IS_ERR(private->suspend_state)) {
-		exynos_drm_fbdev_resume(drm_dev);
-		drm_kms_helper_poll_enable(drm_dev);
-		return PTR_ERR(private->suspend_state);
-	}
-
-	return 0;
+	return  drm_mode_config_helper_suspend(drm_dev);
 }
 
 static void exynos_drm_resume(struct device *dev)
 {
 	struct drm_device *drm_dev = dev_get_drvdata(dev);
-	struct exynos_drm_private *private;
-
-	if (!drm_dev)
-		return;
 
-	private = drm_dev->dev_private;
-	drm_atomic_helper_resume(drm_dev, private->suspend_state);
-	exynos_drm_fbdev_resume(drm_dev);
-	drm_kms_helper_poll_enable(drm_dev);
+	drm_mode_config_helper_resume(drm_dev);
 }
 
 static const struct dev_pm_ops exynos_drm_pm_ops = {

drivers/gpu/drm/exynos/exynos_drm_drv.h

@@ -195,7 +195,6 @@ struct drm_exynos_file_private {
  */
 struct exynos_drm_private {
 	struct drm_fb_helper *fb_helper;
-	struct drm_atomic_state *suspend_state;
 
 	struct device *g2d_dev;
 	struct device *dma_dev;

drivers/gpu/drm/exynos/exynos_drm_fbdev.c

@@ -270,20 +270,3 @@ void exynos_drm_fbdev_fini(struct drm_device *dev)
 	private->fb_helper = NULL;
 }
 
-void exynos_drm_fbdev_suspend(struct drm_device *dev)
-{
-	struct exynos_drm_private *private = dev->dev_private;
-
-	console_lock();
-	drm_fb_helper_set_suspend(private->fb_helper, 1);
-	console_unlock();
-}
-
-void exynos_drm_fbdev_resume(struct drm_device *dev)
-{
-	struct exynos_drm_private *private = dev->dev_private;
-
-	console_lock();
-	drm_fb_helper_set_suspend(private->fb_helper, 0);
-	console_unlock();
-}

drivers/gpu/drm/exynos/exynos_drm_fbdev.h

@@ -19,8 +19,6 @@
 
 int exynos_drm_fbdev_init(struct drm_device *dev);
 void exynos_drm_fbdev_fini(struct drm_device *dev);
-void exynos_drm_fbdev_suspend(struct drm_device *drm);
-void exynos_drm_fbdev_resume(struct drm_device *drm);
 
 #else
 
@@ -39,14 +37,6 @@ static inline void exynos_drm_fbdev_restore_mode(struct drm_device *dev)
 
 #define exynos_drm_output_poll_changed (NULL)
 
-static inline void exynos_drm_fbdev_suspend(struct drm_device *drm)
-{
-}
-
-static inline void exynos_drm_fbdev_resume(struct drm_device *drm)
-{
-}
-
 #endif
 
 #endif