[PATCH AUTOSEL 6.6 23/38] drm/amd/display: increased min_dcfclk_mhz and min_fclk_mhz

[Sasha Levin <sashal@kernel.org>]

From: Sohaib Nadeem <sohaib.nadeem@amd.com>

[ Upstream commit 2ff33c759a4247c84ec0b7815f1f223e155ba82a ]

[why]
Originally, PMFW said min FCLK is 300Mhz, but min DCFCLK can be increased
to 400Mhz because min FCLK is now 600Mhz so FCLK >= 1.5 * DCFCLK hardware
requirement will still be satisfied. Increasing min DCFCLK addresses
underflow issues (underflow occurs when phantom pipe is turned on for some
Sub-Viewport configs).

[how]
Increasing DCFCLK by raising the min_dcfclk_mhz

Reviewed-by: Chaitanya Dhere <chaitanya.dhere@amd.com>
Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Sohaib Nadeem <sohaib.nadeem@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
index cf3b400c8619..ec09d5a8876b 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
@@ -2452,7 +2452,7 @@ static int build_synthetic_soc_states(bool disable_dc_mode_overwrite, struct clk
 	struct _vcs_dpi_voltage_scaling_st entry = {0};
 	struct clk_limit_table_entry max_clk_data = {0};
 
-	unsigned int min_dcfclk_mhz = 199, min_fclk_mhz = 299;
+	unsigned int min_dcfclk_mhz = 399, min_fclk_mhz = 599;
 
 	static const unsigned int num_dcfclk_stas = 5;
 	unsigned int dcfclk_sta_targets[DC__VOLTAGE_STATES] = {199, 615, 906, 1324, 1564};
-- 
2.43.0