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.c

@@ -2018,15 +2018,16 @@ static bool dcn20_validate_dsc(struct dc *dc, struct dc_state *new_ctx)
 }
 #endif
 
-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)
 {
 	bool out = false;
 
-	BW_VAL_TRACE_SETUP();
-
 	int pipe_cnt, i, pipe_idx, vlevel, vlevel_unsplit;
-	int pipe_split_from[MAX_PIPES];
 	bool odm_capable = context->bw_ctx.dml.ip.odm_capable;
 	bool force_split = false;
 #ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
@@ -2034,10 +2035,7 @@ bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
 #endif
 	int split_threshold = dc->res_pool->pipe_count / 2;
 	bool avoid_split = dc->debug.pipe_split_policy != MPC_SPLIT_DYNAMIC;
-	display_e2e_pipe_params_st *pipes = kzalloc(dc->res_pool->pipe_count * sizeof(display_e2e_pipe_params_st), GFP_KERNEL);
-	DC_LOGGER_INIT(dc->ctx->logger);
 
-	BW_VAL_TRACE_COUNT();
 
 	ASSERT(pipes);
 	if (!pipes)
@@ -2077,7 +2075,6 @@ bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
 			&context->res_ctx, pipes);
 
 	if (!pipe_cnt) {
-		BW_VAL_TRACE_SKIP(pass);
 		out = true;
 		goto validate_out;
 	}
@@ -2242,13 +2239,26 @@ bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
 	}
 #endif
 
-	BW_VAL_TRACE_END_VOLTAGE_LEVEL();
+	*vlevel_out = vlevel;
 
-	if (fast_validate) {
-		BW_VAL_TRACE_SKIP(fast);
 	out = true;
 	goto validate_out;
-	}
+
+validate_fail:
+	out = false;
+
+validate_out:
+	return out;
+}
+
+void dcn20_calculate_wm(
+		struct dc *dc, struct dc_state *context,
+		display_e2e_pipe_params_st *pipes,
+		int *out_pipe_cnt,
+		int *pipe_split_from,
+		int vlevel)
+{
+	int pipe_cnt, i, pipe_idx;
 
 	for (i = 0, pipe_idx = 0, pipe_cnt = 0; i < dc->res_pool->pipe_count; i++) {
 			if (!context->res_ctx.pipe_ctx[i].stream)
@@ -2275,10 +2285,12 @@ bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
 				else
 					pipes[pipe_cnt].pipe.dest.odm_combine = 0;
 			}
+
 			if (dc->config.forced_clocks) {
 				pipes[pipe_cnt].clks_cfg.dispclk_mhz = context->bw_ctx.dml.soc.clock_limits[0].dispclk_mhz;
 				pipes[pipe_cnt].clks_cfg.dppclk_mhz = context->bw_ctx.dml.soc.clock_limits[0].dppclk_mhz;
 			}
+
 			pipe_cnt++;
 		}
 
@@ -2291,6 +2303,8 @@ bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
 					&context->res_ctx, pipes);
 		}
 
+		*out_pipe_cnt = pipe_cnt;
+
 		pipes[0].clks_cfg.voltage = vlevel;
 		pipes[0].clks_cfg.dcfclk_mhz = context->bw_ctx.dml.soc.clock_limits[vlevel].dcfclk_mhz;
 		pipes[0].clks_cfg.socclk_mhz = context->bw_ctx.dml.soc.clock_limits[vlevel].socclk_mhz;
@@ -2337,6 +2351,16 @@ bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
 		context->bw_ctx.bw.dcn.watermarks.a.cstate_pstate.cstate_exit_ns = get_wm_stutter_exit(&context->bw_ctx.dml, pipes, pipe_cnt) * 1000;
 		context->bw_ctx.bw.dcn.watermarks.a.cstate_pstate.pstate_change_ns = get_wm_dram_clock_change(&context->bw_ctx.dml, pipes, pipe_cnt) * 1000;
 		context->bw_ctx.bw.dcn.watermarks.a.pte_meta_urgent_ns = get_wm_memory_trip(&context->bw_ctx.dml, pipes, pipe_cnt) * 1000;
+}
+
+void dcn20_calculate_dlg_params(
+		struct dc *dc, struct dc_state *context,
+		display_e2e_pipe_params_st *pipes,
+		int pipe_cnt,
+		int vlevel)
+{
+	int i, pipe_idx;
+
 	/* Writeback MCIF_WB arbitration parameters */
 	dc->res_pool->funcs->set_mcif_arb_params(dc, context, pipes, pipe_cnt);
 
@@ -2351,7 +2375,7 @@ bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
 							!= dm_dram_clock_change_unsupported;
 	context->bw_ctx.bw.dcn.clk.dppclk_khz = 0;
 
-	BW_VAL_TRACE_END_WATERMARKS();
+
 
 	for (i = 0, pipe_idx = 0; i < dc->res_pool->pipe_count; i++) {
 		if (!context->res_ctx.pipe_ctx[i].stream)
@@ -2393,8 +2417,40 @@ bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
 				pipes[pipe_idx].pipe);
 		pipe_idx++;
 	}
+}
+
+bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
+		bool fast_validate)
+{
+	bool out = false;
+
+	BW_VAL_TRACE_SETUP();
+
+	int vlevel = 0;
+	int pipe_split_from[MAX_PIPES];
+	int pipe_cnt = 0;
+	display_e2e_pipe_params_st *pipes = kzalloc(dc->res_pool->pipe_count * sizeof(display_e2e_pipe_params_st), GFP_KERNEL);
+	DC_LOGGER_INIT(dc->ctx->logger);
+
+	BW_VAL_TRACE_COUNT();
+
+	out = dcn20_fast_validate_bw(dc, context, pipes, pipe_split_from, &vlevel);
+
+	if (!out)
+		goto validate_fail;
+
+	BW_VAL_TRACE_END_VOLTAGE_LEVEL();
+
+	if (fast_validate) {
+		BW_VAL_TRACE_SKIP(fast);
+		goto validate_out;
+	}
+
+	dcn20_calculate_wm(dc, context, pipes, &pipe_cnt, pipe_split_from, vlevel);
+	dcn20_calculate_dlg_params(dc, context, pipes, pipe_cnt, vlevel);
+
+	BW_VAL_TRACE_END_WATERMARKS();
 
-	out = true;
 	goto validate_out;
 
 validate_fail:

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)