Commit a88b19b1 authored Oct 15, 2024 by Fangzhi Zuo Committed by Alex Deucher Oct 28, 2024

drm/amd/display: Reduce HPD Detection Interval for IPS



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: afca033f ("drm/amd/display: Add periodic detection for IPS")
Reviewed-by: Roman Li <roman.li@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent 68bf9531

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)