drm/amd/display: Add dc_debug flag to disable min fclk

[Why&How]
Add debug flag for an option to disable min fclk.
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c

@@ -136,13 +136,13 @@ void vg_update_clocks(struct clk_mgr *clk_mgr_base,
 		}
 	}
 
-	if (should_set_clock(safe_to_lower, new_clocks->dcfclk_khz, clk_mgr_base->clks.dcfclk_khz)) {
+	if (should_set_clock(safe_to_lower, new_clocks->dcfclk_khz, clk_mgr_base->clks.dcfclk_khz) && !dc->debug.disable_min_fclk) {
 		clk_mgr_base->clks.dcfclk_khz = new_clocks->dcfclk_khz;
 		dcn301_smu_set_hard_min_dcfclk(clk_mgr, clk_mgr_base->clks.dcfclk_khz);
 	}
 
 	if (should_set_clock(safe_to_lower,
-			new_clocks->dcfclk_deep_sleep_khz, clk_mgr_base->clks.dcfclk_deep_sleep_khz)) {
+			new_clocks->dcfclk_deep_sleep_khz, clk_mgr_base->clks.dcfclk_deep_sleep_khz) && !dc->debug.disable_min_fclk) {
 		clk_mgr_base->clks.dcfclk_deep_sleep_khz = new_clocks->dcfclk_deep_sleep_khz;
 		dcn301_smu_set_min_deep_sleep_dcfclk(clk_mgr, clk_mgr_base->clks.dcfclk_deep_sleep_khz);
 	}

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

@@ -460,6 +460,7 @@ struct dc_debug_options {
 	enum pipe_split_policy pipe_split_policy;
 	bool force_single_disp_pipe_split;
 	bool voltage_align_fclk;
+	bool disable_min_fclk;
 
 	bool disable_dfs_bypass;
 	bool disable_dpp_power_gate;

drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c

 /*
- * Copyright 2020 Advanced Micro Devices, Inc.
+ * Copyright 2019-2021 Advanced Micro Devices, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),