drm/amd/display: Release DSC before acquiring

[why]
Need to unassign DSC from pipes that are not using it
so other pipes can acquire it. That is needed for
asic's that have unmatching number of DSC engines from
the number of pipes.

[how]
Before acquiring dsc to stream resources, first remove it.
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Reviewed-by: Eryk Brol <Eryk.Brol@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c

@@ -833,6 +833,9 @@ bool compute_mst_dsc_configs_for_state(struct drm_atomic_state *state,
 		if (computed_streams[i])
 			continue;
 
+		if (dcn20_remove_stream_from_ctx(stream->ctx->dc, dc_state, stream) != DC_OK)
+			return false;
+
 		mutex_lock(&aconnector->mst_mgr.lock);
 		if (!compute_mst_dsc_configs_for_link(state, dc_state, stream->link)) {
 			mutex_unlock(&aconnector->mst_mgr.lock);
@@ -850,7 +853,8 @@ bool compute_mst_dsc_configs_for_state(struct drm_atomic_state *state,
 		stream = dc_state->streams[i];
 
 		if (stream->timing.flags.DSC == 1)
-			dc_stream_add_dsc_to_resource(stream->ctx->dc, dc_state, stream);
+			if (dc_stream_add_dsc_to_resource(stream->ctx->dc, dc_state, stream) != DC_OK)
+				return false;
 	}
 
 	return true;