drm/amd/display: move bw calc code into helpers

[Why]
For better readability and reusability

[How]
Move snippets of BW calculation code into helpers.
Signed-off-by: Eric Yang <Eric.Yang2@amd.com>
Reviewed-by: Fatemeh Darbehani <Fatemeh.Darbehani@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c

@@ -26,8 +26,6 @@
 #include "dccg.h"
 #include "clk_mgr_internal.h"
 
-
-#include "dcn20/dcn20_clk_mgr.h"
 #include "dce100/dce_clk_mgr.h"
 #include "reg_helper.h"
 #include "core_types.h"

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h

@@ -116,6 +116,17 @@ void dcn20_set_mcif_arb_params(
 		display_e2e_pipe_params_st *pipes,
 		int pipe_cnt);
 bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context, bool fast_validate);
+bool dcn20_fast_validate_bw(
+		struct dc *dc,
+		struct dc_state *context,
+		display_e2e_pipe_params_st *pipes,
+		int *pipe_split_from,
+		int *vlevel_out);
+void dcn20_calculate_dlg_params(
+		struct dc *dc, struct dc_state *context,
+		display_e2e_pipe_params_st *pipes,
+		int pipe_cnt,
+		int vlevel);
 
 enum dc_status dcn20_build_mapped_resource(const struct dc *dc, struct dc_state *context, struct dc_stream_state *stream);
 enum dc_status dcn20_add_stream_to_ctx(struct dc *dc, struct dc_state *new_ctx, struct dc_stream_state *dc_stream);

drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h

@@ -64,6 +64,8 @@ enum dentist_divider_range {
  ***************************************************************************************
  */
 
+/* Macros */
+
 #define TO_CLK_MGR_INTERNAL(clk_mgr)\
 	container_of(clk_mgr, struct clk_mgr_internal, base)