drm/amd/display: call remove_stream_from_ctx from res_pool funcs

[Why & How]
DM should never use a non-interface function to call into
DC. The original code is incorrect on ASICs that don't
use DCN20's remove_stream_from_ctx function.
Reviewed-by: Aurabindo Pillai <Aurabindo.Pillai@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@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

@@ -1153,6 +1153,7 @@ int compute_mst_dsc_configs_for_state(struct drm_atomic_state *state,
 	bool computed_streams[MAX_PIPES];
 	struct amdgpu_dm_connector *aconnector;
 	struct drm_dp_mst_topology_mgr *mst_mgr;
+	struct resource_pool *res_pool;
 	int link_vars_start_index = 0;
 	int ret = 0;
 
@@ -1161,6 +1162,7 @@ int compute_mst_dsc_configs_for_state(struct drm_atomic_state *state,
 
 	for (i = 0; i < dc_state->stream_count; i++) {
 		stream = dc_state->streams[i];
+		res_pool = stream->ctx->dc->res_pool;
 
 		if (stream->signal != SIGNAL_TYPE_DISPLAY_PORT_MST)
 			continue;
@@ -1176,7 +1178,8 @@ int 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)
+		if (!res_pool->funcs->remove_stream_from_ctx ||
+		    res_pool->funcs->remove_stream_from_ctx(stream->ctx->dc, dc_state, stream) != DC_OK)
 			return -EINVAL;
 
 		if (!is_dsc_need_re_compute(state, dc_state, stream->link))
@@ -1214,6 +1217,7 @@ static int pre_compute_mst_dsc_configs_for_state(struct drm_atomic_state *state,
 	bool computed_streams[MAX_PIPES];
 	struct amdgpu_dm_connector *aconnector;
 	struct drm_dp_mst_topology_mgr *mst_mgr;
+	struct resource_pool *res_pool;
 	int link_vars_start_index = 0;
 	int ret = 0;
 
@@ -1222,6 +1226,7 @@ static int pre_compute_mst_dsc_configs_for_state(struct drm_atomic_state *state,
 
 	for (i = 0; i < dc_state->stream_count; i++) {
 		stream = dc_state->streams[i];
+		res_pool = stream->ctx->dc->res_pool;
 
 		if (stream->signal != SIGNAL_TYPE_DISPLAY_PORT_MST)
 			continue;