From: Rex Zhu <Rex.Zhu@amd.com>
Date: Thu, 26 Oct 2017 00:03:27 -0400
Subject: Revert "drm/amd/display: Match actual state during S3 resume."
Git-commit: 9a68db7220d05fb28de139a7db93bd6866cc86fa
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

This reverts commit 4f346e655d24140fb40b46f814506ba17ac34ea1.

fix s3 hang issue.

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |   33 ----------------------
 1 file changed, 33 deletions(-)

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -641,11 +641,6 @@ int amdgpu_dm_display_resume(struct amdg
 	struct drm_connector *connector;
 	struct drm_crtc *crtc;
 	struct drm_crtc_state *new_crtc_state;
-	struct dm_crtc_state *dm_crtc_state;
-	struct drm_plane *plane;
-	struct drm_plane_state *plane_state;
-	struct dm_plane_state *dm_plane_state;
-	struct dm_atomic_state *cached_state;
 	int ret = 0;
 	int i;
 
@@ -684,34 +679,6 @@ int amdgpu_dm_display_resume(struct amdg
 	for_each_new_crtc_in_state(adev->dm.cached_state, crtc, new_crtc_state, i)
 		new_crtc_state->active_changed = true;
 
-	cached_state = to_dm_atomic_state(adev->dm.cached_state);
-
-	/*
-	 * During suspend, the cached state is saved before all streams are
-	 * disabled. Refresh cached state to match actual current state before
-	 * restoring it.
-	 */
-	WARN_ON(kref_read(&cached_state->context->refcount) > 1);
-	dc_release_state(cached_state->context);
-
-	for_each_new_crtc_in_state(adev->dm.cached_state, crtc, new_crtc_state, i) {
-		dm_crtc_state = to_dm_crtc_state(new_crtc_state);
-		if (dm_crtc_state->stream) {
-			WARN_ON(kref_read(&dm_crtc_state->stream->refcount) > 1);
-			dc_stream_release(dm_crtc_state->stream);
-			dm_crtc_state->stream = NULL;
-		}
-	}
-
-	for_each_new_plane_in_state(adev->dm.cached_state, plane, plane_state, i) {
-		dm_plane_state = to_dm_plane_state(plane_state);
-		if (dm_plane_state->dc_state) {
-			WARN_ON(kref_read(&dm_plane_state->dc_state->refcount) > 1);
-			dc_plane_state_release(dm_plane_state->dc_state);
-			dm_plane_state->dc_state = NULL;
-		}
-	}
-
 	ret = drm_atomic_helper_resume(ddev, adev->dm.cached_state);
 
 	drm_atomic_state_put(adev->dm.cached_state);