Thread (396 messages) 396 messages, 10 authors, 2021-05-11
STALE1902d REVIEWED: 2 (1M)

[PATCH 5.12 252/384] drm/amd/display: Update DCN302 SR Exit Latency

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-05-10 12:26:08
Also in: lkml
Subsystem: amd display core, drm drivers, radeon and amdgpu drm drivers, the rest · Maintainers: Harry Wentland, Leo Li, David Airlie, Simona Vetter, Alex Deucher, Christian König, Linus Torvalds

From: Joshua Aberback <redacted>

[ Upstream commit 79f02534810c9557fb3217b538616dc42a1de3b9 ]

[Why&How]
Update SR Exit Latency to fix screen flickering caused due to OTG
underflow. This is the recommended value given by the hardware IP team.

Signed-off-by: Joshua Aberback <redacted>
Acked-by: Aurabindo Pillai <redacted>
Reviewed-by: Harry Wentland <harry.wentland@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/dcn302/dcn302_resource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
index 4b659b63f75b..d03b1975e417 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
@@ -164,7 +164,7 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_02_soc = {
 
 		.min_dcfclk = 500.0, /* TODO: set this to actual min DCFCLK */
 		.num_states = 1,
-		.sr_exit_time_us = 12,
+		.sr_exit_time_us = 15.5,
 		.sr_enter_plus_exit_time_us = 20,
 		.urgent_latency_us = 4.0,
 		.urgent_latency_pixel_data_only_us = 4.0,
-- 
2.30.2


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