This is a note to let you know that I've just added the patch titled
drm/amd/display: Reduce HPD Detection Interval for IPS
to the 6.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-reduce-hpd-detection-interval-for-ip.patch
and it can be found in the queue-6.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b6742308a5067eba836ddb4afd096c652b6613ff
Author: Fangzhi Zuo <Jerry.Zuo@xxxxxxx>
Date: Tue Oct 15 14:22:32 2024 -0400
drm/amd/display: Reduce HPD Detection Interval for IPS
[ Upstream commit a88b19b13fb41a3fa03ec67b5f57cc267fbfb160 ]
Fix DP Compliance test 4.2.1.3, 4.2.2.8, 4.3.1.12, 4.3.1.13
when IPS enabled.
Original HPD detection interval is set to 5s which violates DP
compliance.
Reduce the interval parameter, such that link training can be
finished within 5 seconds.
Fixes: afca033f10d3 ("drm/amd/display: Add periodic detection for IPS")
Reviewed-by: Roman Li <roman.li@xxxxxxx>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@xxxxxxx>
Signed-off-by: Tom Chung <chiahsuan.chung@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
index 4593c158cc156..5ca9cdbac3d72 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
@@ -35,7 +35,7 @@
#include "amdgpu_dm_trace.h"
#include "amdgpu_dm_debugfs.h"
-#define HPD_DETECTION_PERIOD_uS 5000000
+#define HPD_DETECTION_PERIOD_uS 2000000
#define HPD_DETECTION_TIME_uS 100000
void amdgpu_dm_crtc_handle_vblank(struct amdgpu_crtc *acrtc)
