[PATCH 06/31] drm/amd/display: Use dc_update_surfaces_for_stream for flip.

[Harry Wentland]

From: Andrey Grodzovsky <Andrey.Grodzovsky at amd.com>

Today we use special interface for flip because of fear of cuncurency issues
over dc->current_ctx. This should be no longer an issue when flipping on
multiple CRTCs concurently since for fast update (as flip is) no new context
is created and the exsisitng is not destroyed. For full updates case when
removing or adding streams on once CRTC while flipping on another
Adding all current active CRTC's states to the atomic commit in
amdgpu_dm_atomic_check will garntee that any such full update commit
will wait for completion of any outstanding flip.

Change-Id: I0c7e972eec82ae6f61706800ef5d40ed480683d9
Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky at amd.com>
Reviewed-by: Andrey Grodzovsky <Andrey.Grodzovsky at amd.com>
Acked-by: Harry Wentland <Harry.Wentland at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c  |  9 ++++++---
 .../drm/amd/display/amdgpu_dm/amdgpu_dm_types.c    | 23 +++++++++++++++++++++-
 2 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index cd06229bef2e..36fe956b0a89 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1355,6 +1355,7 @@ static void dm_page_flip(struct amdgpu_device *adev,
 	struct amdgpu_crtc *acrtc;
 	const struct dc_stream *stream;
 	struct dc_flip_addrs addr = { {0} };
+	struct dc_surface_update surface_updates[1] = { {0} };
 
 	/*
 	 * TODO risk of concurrency issues
@@ -1417,9 +1418,11 @@ static void dm_page_flip(struct amdgpu_device *adev,
 		acrtc->base.state->event = NULL;
 	}
 
-	dc_flip_surface_addrs(adev->dm.dc,
-			      dc_stream_get_status(stream)->surfaces,
-			      &addr, 1);
+	surface_updates->surface = dc_stream_get_status(stream)->surfaces[0];
+	surface_updates->flip_addr = &addr;
+
+
+	dc_update_surfaces_for_stream(adev->dm.dc, surface_updates, 1, stream);
 
 	DRM_DEBUG_DRIVER("%s Flipping to hi: 0x%x, low: 0x%x \n",
 			 __func__,
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
index 8aeb10786b94..de5c63f42d65 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
@@ -3082,6 +3082,7 @@ int amdgpu_dm_atomic_check(struct drm_device *dev,
 	struct dc *dc = adev->dm.dc;
 	bool need_to_validate = false;
 	struct validate_context *context;
+	bool wait_4_prev_commits = false;
 
 	ret = drm_atomic_helper_check(dev, state);
 
@@ -3158,6 +3159,7 @@ int amdgpu_dm_atomic_check(struct drm_device *dev,
 
 			new_stream_count++;
 			need_to_validate = true;
+			wait_4_prev_commits = true;
 			break;
 		}
 
@@ -3203,6 +3205,7 @@ int amdgpu_dm_atomic_check(struct drm_device *dev,
 
 			new_stream_count++;
 			need_to_validate = true;
+			wait_4_prev_commits = true;
 
 			break;
 		}
@@ -3214,6 +3217,7 @@ int amdgpu_dm_atomic_check(struct drm_device *dev,
 						set,
 						set_count,
 						acrtc->stream);
+				wait_4_prev_commits = true;
 			}
 			break;
 		}
@@ -3306,9 +3310,26 @@ int amdgpu_dm_atomic_check(struct drm_device *dev,
 
 	context = dc_get_validate_context(dc, set, set_count);
 
-	if (need_to_validate == false || set_count == 0 || context)
+	if (need_to_validate == false || set_count == 0 || context) {
+
 		ret = 0;
 
+		if (wait_4_prev_commits) {
+			list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+				struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
+				struct drm_crtc_state *crtc_state;
+
+				if (acrtc->stream) {
+					crtc_state = drm_atomic_get_crtc_state(state, crtc);
+					if (IS_ERR(crtc_state)) {
+						ret = PTR_ERR(crtc_state);
+						break;
+					}
+				}
+			}
+		}
+	}
+
 	if (context) {
 		dc_resource_validate_ctx_destruct(context);
 		dm_free(context);
-- 
2.11.0