drm: Merge __drm_atomic_helper_disable_all() into drm_atomic_helper_disable_all()

The only difference between the functions is the clean_old_fbs argument, whose
use was removed in the patch referenced below. So remove the internal
copy and drop the guts back into drm_atomic_helper_disable_all()

Changes in v2:
- Instead of just removing the unused arg, merge the functions

Fixes: e00fb856 ("drm: Stop updating plane->crtc/fb/old_fb on atomic drivers")
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Sinclair Yeh <syeh@vmware.com> # This email bounces :(
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Sean Paul <sean@poorly.run>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190212173245.51980-1-sean@poorly.run

drivers/gpu/drm/drm_atomic_helper.c

@@ -3030,9 +3030,31 @@ int __drm_atomic_helper_set_config(struct drm_mode_set *set,
 	return 0;
 }
 
-static int __drm_atomic_helper_disable_all(struct drm_device *dev,
-					   struct drm_modeset_acquire_ctx *ctx,
-					   bool clean_old_fbs)
+/**
+ * drm_atomic_helper_disable_all - disable all currently active outputs
+ * @dev: DRM device
+ * @ctx: lock acquisition context
+ *
+ * Loops through all connectors, finding those that aren't turned off and then
+ * turns them off by setting their DPMS mode to OFF and deactivating the CRTC
+ * that they are connected to.
+ *
+ * This is used for example in suspend/resume to disable all currently active
+ * functions when suspending. If you just want to shut down everything at e.g.
+ * driver unload, look at drm_atomic_helper_shutdown().
+ *
+ * Note that if callers haven't already acquired all modeset locks this might
+ * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
+ *
+ * Returns:
+ * 0 on success or a negative error code on failure.
+ *
+ * See also:
+ * drm_atomic_helper_suspend(), drm_atomic_helper_resume() and
+ * drm_atomic_helper_shutdown().
+ */
+int drm_atomic_helper_disable_all(struct drm_device *dev,
+				  struct drm_modeset_acquire_ctx *ctx)
 {
 	struct drm_atomic_state *state;
 	struct drm_connector_state *conn_state;
@@ -3090,35 +3112,6 @@ static int __drm_atomic_helper_disable_all(struct drm_device *dev,
 	drm_atomic_state_put(state);
 	return ret;
 }
-
-/**
- * drm_atomic_helper_disable_all - disable all currently active outputs
- * @dev: DRM device
- * @ctx: lock acquisition context
- *
- * Loops through all connectors, finding those that aren't turned off and then
- * turns them off by setting their DPMS mode to OFF and deactivating the CRTC
- * that they are connected to.
- *
- * This is used for example in suspend/resume to disable all currently active
- * functions when suspending. If you just want to shut down everything at e.g.
- * driver unload, look at drm_atomic_helper_shutdown().
- *
- * Note that if callers haven't already acquired all modeset locks this might
- * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
- *
- * Returns:
- * 0 on success or a negative error code on failure.
- *
- * See also:
- * drm_atomic_helper_suspend(), drm_atomic_helper_resume() and
- * drm_atomic_helper_shutdown().
- */
-int drm_atomic_helper_disable_all(struct drm_device *dev,
-				  struct drm_modeset_acquire_ctx *ctx)
-{
-	return __drm_atomic_helper_disable_all(dev, ctx, false);
-}
 EXPORT_SYMBOL(drm_atomic_helper_disable_all);
 
 /**
@@ -3139,7 +3132,7 @@ void drm_atomic_helper_shutdown(struct drm_device *dev)
 
 	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
-	ret = __drm_atomic_helper_disable_all(dev, &ctx, true);
+	ret = drm_atomic_helper_disable_all(dev, &ctx);
 	if (ret)
 		DRM_ERROR("Disabling all crtc's during unload failed with %i\n", ret);