[PATCH 4.12 60/99] Revert "drm/amdgpu: fix vblank_time when displays are off"

[Greg Kroah-Hartman]

4.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexdeucher@xxxxxxxxx>

This reverts commit 2dc1889ebf8501b0edf125e89a30e1cf3744a2a7.

Fixes a suspend and resume regression.

bug: https://bugzilla.kernel.org/show_bug.cgi?id=196615
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
@@ -839,8 +839,6 @@ static int amdgpu_cgs_get_active_display
 
 	mode_info = info->mode_info;
 	if (mode_info) {
-		/* if the displays are off, vblank time is max */
-		mode_info->vblank_time_us = 0xffffffff;
 		/* always set the reference clock */
 		mode_info->ref_clock = adev->clock.spll.reference_freq;
 	}