[PATCH 05/16] drm/amd/display: Reduce HPD Detection Interval for IPS

[Tom Chung]

From: Fangzhi Zuo <Jerry.Zuo at amd.com>

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 at amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo at amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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 ffa4d3965b4b..171099a3ea05 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)
-- 
2.34.1