drm/tegra: Convert drm_atomic_helper_suspend/resume()

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

With this conversion, tegra_drm_fb_suspend() and
tegra_drm_fb_resume() will not be used anymore.
Both of these functions can be removed.

Also, in tegra_drm struct's member state will not be
used anymore. So this can be removed forever.

Fixed one sparse warning.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Ajit Negi <ajitn.linux@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/drm.c

@@ -1212,31 +1212,15 @@ static int host1x_drm_remove(struct host1x_device *dev)
 static int host1x_drm_suspend(struct device *dev)
 {
 	struct drm_device *drm = dev_get_drvdata(dev);
-	struct tegra_drm *tegra = drm->dev_private;
-
-	drm_kms_helper_poll_disable(drm);
-	tegra_drm_fb_suspend(drm);
-
-	tegra->state = drm_atomic_helper_suspend(drm);
-	if (IS_ERR(tegra->state)) {
-		tegra_drm_fb_resume(drm);
-		drm_kms_helper_poll_enable(drm);
-		return PTR_ERR(tegra->state);
-	}
 
-	return 0;
+	return drm_mode_config_helper_suspend(drm);
 }
 
 static int host1x_drm_resume(struct device *dev)
 {
 	struct drm_device *drm = dev_get_drvdata(dev);
-	struct tegra_drm *tegra = drm->dev_private;
 
-	drm_atomic_helper_resume(drm, tegra->state);
-	tegra_drm_fb_resume(drm);
-	drm_kms_helper_poll_enable(drm);
-
-	return 0;
+	return drm_mode_config_helper_resume(drm);
 }
 #endif
 

drivers/gpu/drm/tegra/drm.h

@@ -60,8 +60,6 @@ struct tegra_drm {
 	unsigned int pitch_align;
 
 	struct tegra_display_hub *hub;
-
-	struct drm_atomic_state *state;
 };
 
 struct tegra_drm_client;
@@ -186,8 +184,6 @@ int tegra_drm_fb_prepare(struct drm_device *drm);
 void tegra_drm_fb_free(struct drm_device *drm);
 int tegra_drm_fb_init(struct drm_device *drm);
 void tegra_drm_fb_exit(struct drm_device *drm);
-void tegra_drm_fb_suspend(struct drm_device *drm);
-void tegra_drm_fb_resume(struct drm_device *drm);
 
 extern struct platform_driver tegra_display_hub_driver;
 extern struct platform_driver tegra_dc_driver;

drivers/gpu/drm/tegra/fb.c

@@ -356,7 +356,7 @@ static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
 		/* Undo the special mapping we made in fbdev probe. */
 		if (bo && bo->pages) {
 			vunmap(bo->vaddr);
-			bo->vaddr = 0;
+			bo->vaddr = NULL;
 		}
 
 		drm_framebuffer_remove(fbdev->fb);
@@ -412,25 +412,3 @@ void tegra_drm_fb_exit(struct drm_device *drm)
 	tegra_fbdev_exit(tegra->fbdev);
 #endif
 }
-
-void tegra_drm_fb_suspend(struct drm_device *drm)
-{
-#ifdef CONFIG_DRM_FBDEV_EMULATION
-	struct tegra_drm *tegra = drm->dev_private;
-
-	console_lock();
-	drm_fb_helper_set_suspend(&tegra->fbdev->base, 1);
-	console_unlock();
-#endif
-}
-
-void tegra_drm_fb_resume(struct drm_device *drm)
-{
-#ifdef CONFIG_DRM_FBDEV_EMULATION
-	struct tegra_drm *tegra = drm->dev_private;
-
-	console_lock();
-	drm_fb_helper_set_suspend(&tegra->fbdev->base, 0);
-	console_unlock();
-#endif
-}