[PATCH] drm/amd/display: Increase DCN314 SR latency by 1us

[Zhang Zhenzhe <zhenzhe.zhang@outlook.com>]

[Why & How]

On laptops with LPDDR5 modules, underflow can be observed.
It's unclear why it only occurs on specific desktop contents. However,
increasing enter/exit latencies by 1us seems to resolve it.

Fixes: https://gitlab.freedesktop.org/drm/amd/-/issues/5065
Signed-off-by: Zhenzhe Zhang <zhenzhe.zhang@outlook.com>
---
 .../display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c   | 16 ++++++++--------
 .../drm/amd/display/dc/dml/dcn314/dcn314_fpu.c   |  4 ++--
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
index 0cb37827a..7a910cc6d 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
@@ -450,32 +450,32 @@ static struct wm_table lpddr5_wm_table = {
 			.wm_inst = WM_A,
 			.wm_type = WM_TYPE_PSTATE_CHG,
 			.pstate_latency_us = 11.65333,
-			.sr_exit_time_us = 30.0,
-			.sr_enter_plus_exit_time_us = 32.0,
+			.sr_exit_time_us = 31.0,
+			.sr_enter_plus_exit_time_us = 33.0,
 			.valid = true,
 		},
 		{
 			.wm_inst = WM_B,
 			.wm_type = WM_TYPE_PSTATE_CHG,
 			.pstate_latency_us = 11.65333,
-			.sr_exit_time_us = 30.0,
-			.sr_enter_plus_exit_time_us = 32.0,
+			.sr_exit_time_us = 31.0,
+			.sr_enter_plus_exit_time_us = 33.0,
 			.valid = true,
 		},
 		{
 			.wm_inst = WM_C,
 			.wm_type = WM_TYPE_PSTATE_CHG,
 			.pstate_latency_us = 11.65333,
-			.sr_exit_time_us = 30.0,
-			.sr_enter_plus_exit_time_us = 32.0,
+			.sr_exit_time_us = 31.0,
+			.sr_enter_plus_exit_time_us = 33.0,
 			.valid = true,
 		},
 		{
 			.wm_inst = WM_D,
 			.wm_type = WM_TYPE_PSTATE_CHG,
 			.pstate_latency_us = 11.65333,
-			.sr_exit_time_us = 30.0,
-			.sr_enter_plus_exit_time_us = 32.0,
+			.sr_exit_time_us = 31.0,
+			.sr_enter_plus_exit_time_us = 33.0,
 			.valid = true,
 		},
 	}
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
index df9d50b9b..37c760fbb 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
@@ -148,8 +148,8 @@ static struct _vcs_dpi_soc_bounding_box_st dcn3_14_soc = {
 		},
 	},
 	.num_states = 5,
-	.sr_exit_time_us = 16.5,
-	.sr_enter_plus_exit_time_us = 18.5,
+	.sr_exit_time_us = 17.5,
+	.sr_enter_plus_exit_time_us = 19.5,
 	.sr_exit_z8_time_us = 268.0,
 	.sr_enter_plus_exit_z8_time_us = 393.0,
 	.writeback_latency_us = 12.0,
-- 
2.53.0