[PATCH 1/2] drm/amdgpu: save/restore bios scratch when gpu reset

[Chunming Zhou]

Change-Id: If44008e814a2708095c2eb5c1760f331ca260283
Signed-off-by: Chunming Zhou <David1.Zhou at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 66d690e..c2acef9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1948,6 +1948,8 @@ int amdgpu_gpu_reset(struct amdgpu_device *adev)
 	if (amdgpu_device_has_dal_support(adev))
 		state = drm_atomic_helper_suspend(adev->ddev);
 
+	/* save scratch */
+	amdgpu_atombios_scratch_regs_save(adev);
 	r = amdgpu_suspend(adev);
 
 	for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
@@ -1972,7 +1974,8 @@ retry:
 		dev_info(adev->dev, "GPU reset succeeded, trying to resume\n");
 		r = amdgpu_resume(adev);
 	}
-
+	/* restore scratch */
+	amdgpu_atombios_scratch_regs_restore(adev);
 	if (!r) {
 		for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
 			struct amdgpu_ring *ring = adev->rings[i];
-- 
1.9.1