Re: [PATCH v2 4/7] drm/amdgpu: Add suspend function to clear the GPU power profile.

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On 8/21/2023 7:13 PM, Shashank Sharma wrote:

On 21/08/2023 08:47, Arvind Yadav wrote:
This patch adds a suspend function that will clear the GPU
power profile before going into suspend state.

v2:
- Add the new suspend function based on review comment.

Cc: Shashank Sharma <shashank.sharma@xxxxxxx>
Cc: Christian Koenig <christian.koenig@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Arvind Yadav <Arvind.Yadav@xxxxxxx>
---
  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c    |  2 ++
  drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c  | 23 +++++++++++++++++++
  drivers/gpu/drm/amd/include/amdgpu_workload.h |  2 ++
  3 files changed, 27 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index cd3bf641b630..3b70e657b439 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4212,6 +4212,8 @@ int amdgpu_device_suspend(struct drm_device *dev, bool fbcon)
        amdgpu_ras_suspend(adev);
  +    amdgpu_workload_profile_suspend(adev);
+
      amdgpu_device_ip_suspend_phase1(adev);
        if (!adev->in_s0ix)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c
index 6367eb88a44d..44ca8e986984 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c
@@ -174,6 +174,29 @@ void amdgpu_workload_profile_set(struct amdgpu_device *adev,
      mutex_unlock(&workload->workload_lock);
  }
  +void amdgpu_workload_profile_suspend(struct amdgpu_device *adev)
+{
+    struct amdgpu_smu_workload *workload = &adev->smu_workload;
+    int ret;
+
+    mutex_lock(&workload->workload_lock);
+ cancel_delayed_work_sync(&workload->smu_delayed_work);
+
+    /* Clear all the set GPU power profile*/
+    for (int index = fls(workload->submit_workload_status);
+         index > 0; index--) {
+        if (workload->submit_workload_status & (1 << index)) {
+ atomic_set(&workload->power_profile_ref[index], 0);
+            ret = amdgpu_power_profile_clear(adev, index);

Why do we need the checks here ? can't we simply set call power_profile_clear() for all profiles ?

Hi Shashank,

 If we use only one profile then why to clear others. But I can remove the check and clear for all the profiles as per your suggestion.

ThankYou,
~Arvind

- Shashank

+            if (ret)
+                DRM_WARN("Failed to clear power profile %s, err = %d\n",
+                     amdgpu_workload_mode_name[index], ret);
+        }
+    }


+    workload->submit_workload_status = 0;
+    mutex_unlock(&workload->workload_lock);
+}
+
  void amdgpu_workload_profile_init(struct amdgpu_device *adev)
  {
      adev->smu_workload.adev = adev;
diff --git a/drivers/gpu/drm/amd/include/amdgpu_workload.h b/drivers/gpu/drm/amd/include/amdgpu_workload.h
index ee1f87257f2d..0acd8769ec52 100644
--- a/drivers/gpu/drm/amd/include/amdgpu_workload.h
+++ b/drivers/gpu/drm/amd/include/amdgpu_workload.h
@@ -52,6 +52,8 @@ void amdgpu_workload_profile_put(struct amdgpu_device *adev,
  void amdgpu_workload_profile_set(struct amdgpu_device *adev,
                   uint32_t ring_type);
  +void amdgpu_workload_profile_suspend(struct amdgpu_device *adev);
+
  void amdgpu_workload_profile_init(struct amdgpu_device *adev);
    void amdgpu_workload_profile_fini(struct amdgpu_device *adev);



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