From e695e77c6b49c49e5eafdc6239d6b22bfa30c7cc Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 19 Oct 2016 14:40:58 -0400
Subject: drm/amdgpu: move atom scratch register save/restore to common code

We need this for more than just DCE.  Move it out of the DCE modules
and into the device code.  This way we can be sure the scratch registers
are initialized properly before we run asic_init which happens before
DCE IPs are restored.

Fixes atombios hangs in asic_init.

Reviewed-by: JimQu <Jim.Qu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 2b02674..7ca07e7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1959,6 +1959,7 @@ int amdgpu_device_suspend(struct drm_device *dev, bool suspend, bool fbcon)
 	/* evict remaining vram memory */
 	amdgpu_bo_evict_vram(adev);
 
+	amdgpu_atombios_scratch_regs_save(adev);
 	pci_save_state(dev->pdev);
 	if (suspend) {
 		/* Shut down the device */
@@ -2010,6 +2011,7 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
 			return r;
 		}
 	}
+	amdgpu_atombios_scratch_regs_restore(adev);
 
 	/* post card */
 	if (!amdgpu_card_posted(adev) || !resume) {
@@ -2277,8 +2279,9 @@ retry:
 			amdgpu_display_stop_mc_access(adev, &save);
 			amdgpu_wait_for_idle(adev, AMD_IP_BLOCK_TYPE_GMC);
 		}
-
+		amdgpu_atombios_scratch_regs_save(adev);
 		r = amdgpu_asic_reset(adev);
+		amdgpu_atombios_scratch_regs_restore(adev);
 		/* post card */
 		amdgpu_atom_asic_init(adev->mode_info.atom_context);
 
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
index 4108c68..9260cae 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
@@ -3151,10 +3151,6 @@ static int dce_v10_0_hw_fini(void *handle)
 
 static int dce_v10_0_suspend(void *handle)
 {
-	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-
-	amdgpu_atombios_scratch_regs_save(adev);
-
 	return dce_v10_0_hw_fini(handle);
 }
 
@@ -3165,8 +3161,6 @@ static int dce_v10_0_resume(void *handle)
 
 	ret = dce_v10_0_hw_init(handle);
 
-	amdgpu_atombios_scratch_regs_restore(adev);
-
 	/* turn on the BL */
 	if (adev->mode_info.bl_encoder) {
 		u8 bl_level = amdgpu_display_backlight_get_level(adev,
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
index f264b8f..367739b 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
@@ -3215,10 +3215,6 @@ static int dce_v11_0_hw_fini(void *handle)
 
 static int dce_v11_0_suspend(void *handle)
 {
-	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-
-	amdgpu_atombios_scratch_regs_save(adev);
-
 	return dce_v11_0_hw_fini(handle);
 }
 
@@ -3229,8 +3225,6 @@ static int dce_v11_0_resume(void *handle)
 
 	ret = dce_v11_0_hw_init(handle);
 
-	amdgpu_atombios_scratch_regs_restore(adev);
-
 	/* turn on the BL */
 	if (adev->mode_info.bl_encoder) {
 		u8 bl_level = amdgpu_display_backlight_get_level(adev,
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
index b948d6c..15f9fc0 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
@@ -2482,10 +2482,6 @@ static int dce_v6_0_hw_fini(void *handle)
 
 static int dce_v6_0_suspend(void *handle)
 {
-	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-
-	amdgpu_atombios_scratch_regs_save(adev);
-
 	return dce_v6_0_hw_fini(handle);
 }
 
@@ -2496,8 +2492,6 @@ static int dce_v6_0_resume(void *handle)
 
 	ret = dce_v6_0_hw_init(handle);
 
-	amdgpu_atombios_scratch_regs_restore(adev);
-
 	/* turn on the BL */
 	if (adev->mode_info.bl_encoder) {
 		u8 bl_level = amdgpu_display_backlight_get_level(adev,
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
index 5966166..8c4d808 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
@@ -3033,10 +3033,6 @@ static int dce_v8_0_hw_fini(void *handle)
 
 static int dce_v8_0_suspend(void *handle)
 {
-	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-
-	amdgpu_atombios_scratch_regs_save(adev);
-
 	return dce_v8_0_hw_fini(handle);
 }
 
@@ -3047,8 +3043,6 @@ static int dce_v8_0_resume(void *handle)
 
 	ret = dce_v8_0_hw_init(handle);
 
-	amdgpu_atombios_scratch_regs_restore(adev);
-
 	/* turn on the BL */
 	if (adev->mode_info.bl_encoder) {
 		u8 bl_level = amdgpu_display_backlight_get_level(adev,
-- 
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