[PATCH 03/14] drm/amdgpu: add pre_soft_reset ip func

[Chunming Zhou]

It will be used before soft_reset to do some preparing work for reset.

Change-Id: Ie3e614102d0361cf2546a260193a2b2bdfee615b
Signed-off-by: Chunming Zhou <David1.Zhou at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 16 ++++++++++++++++
 drivers/gpu/drm/amd/include/amd_shared.h   |  2 ++
 2 files changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index f9e8185..97957ab 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1969,6 +1969,22 @@ static bool amdgpu_check_soft_reset(struct amdgpu_device *adev)
 	return asic_hang;
 }
 
+int amdgpu_pre_soft_reset(struct amdgpu_device *adev)
+{
+	int i, r = 0;
+
+	for (i = 0; i < adev->num_ip_blocks; i++) {
+		if (!adev->ip_block_status[i].valid)
+			continue;
+		if (adev->ip_blocks[i].funcs->pre_soft_reset)
+			r = adev->ip_blocks[i].funcs->pre_soft_reset(adev);
+		if (r)
+			return r;
+	}
+
+	return 0;
+}
+
 /**
  * amdgpu_gpu_reset - reset the asic
  *
diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h
index 6d284c8..7104085 100644
--- a/drivers/gpu/drm/amd/include/amd_shared.h
+++ b/drivers/gpu/drm/amd/include/amd_shared.h
@@ -170,6 +170,8 @@ struct amd_ip_funcs {
 	int (*wait_for_idle)(void *handle);
 	/* check soft reset the IP block */
 	int (*check_soft_reset)(void *handle);
+	/* pre soft reset the IP block */
+	int (*pre_soft_reset)(void *handle);
 	/* soft reset the IP block */
 	int (*soft_reset)(void *handle);
 	/* enable/disable cg for the IP block */
-- 
1.9.1