From: Nicholas Susanto <nicholas.susanto@xxxxxxx>
[Why]
On 14us for exit latency time causes underflow for 8K monitor with HDR on.
Increasing the latency to 28us fixes the underflow.
[How]
Increase the latency to 28us. This workaround should be sufficient
before we figure out why SR exit so long.
Reviewed-by: Chaitanya Dhere <chaitanya.dhere@xxxxxxx>
Acked-by: Tom Chung <chiahsuan.chung@xxxxxxx>
Signed-off-by: Nicholas Susanto <nicholas.susanto@xxxxxxx>
---
.../display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c | 32 +++++++++----------
.../drm/amd/display/dc/dml/dcn35/dcn35_fpu.c | 4 +--
2 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
index e1b035380f6a..eda39d739ff9 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
@@ -441,32 +441,32 @@ static struct wm_table ddr5_wm_table = {
.wm_inst = WM_A,
.wm_type = WM_TYPE_PSTATE_CHG,
.pstate_latency_us = 11.72,
- .sr_exit_time_us = 14.0,
- .sr_enter_plus_exit_time_us = 16.0,
+ .sr_exit_time_us = 28.0,
+ .sr_enter_plus_exit_time_us = 30.0,
.valid = true,
},
{
.wm_inst = WM_B,
.wm_type = WM_TYPE_PSTATE_CHG,
.pstate_latency_us = 11.72,
- .sr_exit_time_us = 14.0,
- .sr_enter_plus_exit_time_us = 16.0,
+ .sr_exit_time_us = 28.0,
+ .sr_enter_plus_exit_time_us = 30.0,
.valid = true,
},
{
.wm_inst = WM_C,
.wm_type = WM_TYPE_PSTATE_CHG,
.pstate_latency_us = 11.72,
- .sr_exit_time_us = 14.0,
- .sr_enter_plus_exit_time_us = 16.0,
+ .sr_exit_time_us = 28.0,
+ .sr_enter_plus_exit_time_us = 30.0,
.valid = true,
},
{
.wm_inst = WM_D,
.wm_type = WM_TYPE_PSTATE_CHG,
.pstate_latency_us = 11.72,
- .sr_exit_time_us = 14.0,
- .sr_enter_plus_exit_time_us = 16.0,
+ .sr_exit_time_us = 28.0,
+ .sr_enter_plus_exit_time_us = 30.0,
.valid = true,
},
}
@@ -478,32 +478,32 @@ 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 = 14.0,
- .sr_enter_plus_exit_time_us = 16.0,
+ .sr_exit_time_us = 28.0,
+ .sr_enter_plus_exit_time_us = 30.0,
.valid = true,
},
{
.wm_inst = WM_B,
.wm_type = WM_TYPE_PSTATE_CHG,
.pstate_latency_us = 11.65333,
- .sr_exit_time_us = 14.0,
- .sr_enter_plus_exit_time_us = 16.0,
+ .sr_exit_time_us = 28.0,
+ .sr_enter_plus_exit_time_us = 30.0,
.valid = true,
},
{
.wm_inst = WM_C,
.wm_type = WM_TYPE_PSTATE_CHG,
.pstate_latency_us = 11.65333,
- .sr_exit_time_us = 14.0,
- .sr_enter_plus_exit_time_us = 16.0,
+ .sr_exit_time_us = 28.0,
+ .sr_enter_plus_exit_time_us = 30.0,
.valid = true,
},
{
.wm_inst = WM_D,
.wm_type = WM_TYPE_PSTATE_CHG,
.pstate_latency_us = 11.65333,
- .sr_exit_time_us = 14.0,
- .sr_enter_plus_exit_time_us = 16.0,
+ .sr_exit_time_us = 28.0,
+ .sr_enter_plus_exit_time_us = 30.0,
.valid = true,
},
}
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c
index a85693caebd5..912256006d75 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c
@@ -164,8 +164,8 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_5_soc = {
},
},
.num_states = 5,
- .sr_exit_time_us = 14.0,
- .sr_enter_plus_exit_time_us = 16.0,
+ .sr_exit_time_us = 28.0,
+ .sr_enter_plus_exit_time_us = 30.0,
.sr_exit_z8_time_us = 210.0,
.sr_enter_plus_exit_z8_time_us = 320.0,
.fclk_change_latency_us = 24.0,
--
2.34.1
