From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 12 Dec 2017 15:20:22 -0500
Subject: drm/amdgpu: drop scratch regs save and restore from S3/S4 handling
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Git-commit: 4ec6ecf48c64d1da82a008f6fb0be86c4044287d
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

The expectation is that the base driver doesn't mess with these.
Some components interact with these directly so let the components
handle these directly.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2577,7 +2577,6 @@ int amdgpu_device_suspend(struct drm_dev
 	 */
 	amdgpu_bo_evict_vram(adev);
 
-	amdgpu_atombios_scratch_regs_save(adev);
 	pci_save_state(dev->pdev);
 	if (suspend) {
 		/* Shut down the device */
@@ -2626,7 +2625,6 @@ int amdgpu_device_resume(struct drm_devi
 		if (r)
 			goto unlock;
 	}
-	amdgpu_atombios_scratch_regs_restore(adev);
 
 	/* post card */
 	if (amdgpu_need_post(adev)) {