[PATCH 10/21] drm/amd/display: Add dc_debug flag to disable min fclk

[Qingqing Zhuo]

From: Harry Wentland <harry.wentland at amd.com>

[Why&How]
Add debug flag for an option to disable min fclk.

Signed-off-by: Harry Wentland <harry.wentland at amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland at amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo at amd.com>
---
 drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c | 4 ++--
 drivers/gpu/drm/amd/display/dc/dc.h                        | 1 +
 drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c    | 2 +-
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c
index b47e3558e176..c636b589d69d 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c
+++ b/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);
 	}
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 8b725347e2ed..cf5abcb74601 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/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;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
index 10c1884e3d30..2127399cf464 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
@@ -1,5 +1,5 @@
 /*
- * 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"),
-- 
2.17.1