drm/amdgpu: consolidate atom scratch reg handling for hangs

Move from asic specific code to common atom code.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c

@@ -1784,6 +1784,19 @@ void amdgpu_atombios_scratch_regs_restore(struct amdgpu_device *adev)
 		WREG32(mmBIOS_SCRATCH_0 + i, adev->bios_scratch[i]);
 }
 
+void amdgpu_atombios_scratch_regs_engine_hung(struct amdgpu_device *adev,
+					      bool hung)
+{
+	u32 tmp = RREG32(mmBIOS_SCRATCH_3);
+
+	if (hung)
+		tmp |= ATOM_S3_ASIC_GUI_ENGINE_HUNG;
+	else
+		tmp &= ~ATOM_S3_ASIC_GUI_ENGINE_HUNG;
+
+	WREG32(mmBIOS_SCRATCH_3, tmp);
+}
+
 /* Atom needs data in little endian format
  * so swap as appropriate when copying data to
  * or from atom. Note that atom operates on

drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h

@@ -206,6 +206,8 @@ void amdgpu_atombios_scratch_regs_lock(struct amdgpu_device *adev, bool lock);
 void amdgpu_atombios_scratch_regs_init(struct amdgpu_device *adev);
 void amdgpu_atombios_scratch_regs_save(struct amdgpu_device *adev);
 void amdgpu_atombios_scratch_regs_restore(struct amdgpu_device *adev);
+void amdgpu_atombios_scratch_regs_engine_hung(struct amdgpu_device *adev,
+					      bool hung);
 
 void amdgpu_atombios_copy_swap(u8 *dst, u8 *src, u8 num_bytes, bool to_le);
 int amdgpu_atombios_get_max_vddc(struct amdgpu_device *adev, u8 voltage_type,

drivers/gpu/drm/amd/amdgpu/cik.c

@@ -1189,18 +1189,6 @@ static int cik_gpu_pci_config_reset(struct amdgpu_device *adev)
 	return r;
 }
 
-static void cik_set_bios_scratch_engine_hung(struct amdgpu_device *adev, bool hung)
-{
-	u32 tmp = RREG32(mmBIOS_SCRATCH_3);
-
-	if (hung)
-		tmp |= ATOM_S3_ASIC_GUI_ENGINE_HUNG;
-	else
-		tmp &= ~ATOM_S3_ASIC_GUI_ENGINE_HUNG;
-
-	WREG32(mmBIOS_SCRATCH_3, tmp);
-}
-
 /**
  * cik_asic_reset - soft reset GPU
  *
@@ -1213,11 +1201,12 @@ static void cik_set_bios_scratch_engine_hung(struct amdgpu_device *adev, bool hu
 static int cik_asic_reset(struct amdgpu_device *adev)
 {
 	int r;
-	cik_set_bios_scratch_engine_hung(adev, true);
+
+	amdgpu_atombios_scratch_regs_engine_hung(adev, true);
 
 	r = cik_gpu_pci_config_reset(adev);
 
-	cik_set_bios_scratch_engine_hung(adev, false);
+	amdgpu_atombios_scratch_regs_engine_hung(adev, false);
 
 	return r;
 }

drivers/gpu/drm/amd/amdgpu/vi.c

@@ -729,18 +729,6 @@ static int vi_gpu_pci_config_reset(struct amdgpu_device *adev)
 	return -EINVAL;
 }
 
-static void vi_set_bios_scratch_engine_hung(struct amdgpu_device *adev, bool hung)
-{
-	u32 tmp = RREG32(mmBIOS_SCRATCH_3);
-
-	if (hung)
-		tmp |= ATOM_S3_ASIC_GUI_ENGINE_HUNG;
-	else
-		tmp &= ~ATOM_S3_ASIC_GUI_ENGINE_HUNG;
-
-	WREG32(mmBIOS_SCRATCH_3, tmp);
-}
-
 /**
  * vi_asic_reset - soft reset GPU
  *
@@ -754,11 +742,11 @@ static int vi_asic_reset(struct amdgpu_device *adev)
 {
 	int r;
 
-	vi_set_bios_scratch_engine_hung(adev, true);
+	amdgpu_atombios_scratch_regs_engine_hung(adev, true);
 
 	r = vi_gpu_pci_config_reset(adev);
 
-	vi_set_bios_scratch_engine_hung(adev, false);
+	amdgpu_atombios_scratch_regs_engine_hung(adev, false);
 
 	return r;
 }