drm/amd: Add detailed GFXOFF stats to debugfs

Add debugfs interface to log GFXOFF statistics:

- Read amdgpu_gfxoff_count to get the total GFXOFF entry count at the
  time of query since system power-up

- Write 1 to amdgpu_gfxoff_residency to start logging, and 0 to stop.
  Read it to get average GFXOFF residency % multiplied by 100
  during the last logging interval.

Both features are designed to be keep the values persistent between
suspends.

Signed-off-by: André Almeida <andrealmeid@igalia.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
index 956b6ce81c84..1b300c569faf 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
@@ -668,6 +668,51 @@ int amdgpu_dpm_wait_for_event(struct amdgpu_device *adev,
 	return ret;
 }
 
+int amdgpu_dpm_set_residency_gfxoff(struct amdgpu_device *adev, bool value)
+{
+	struct smu_context *smu = adev->powerplay.pp_handle;
+	int ret = 0;
+
+	if (!is_support_sw_smu(adev))
+		return -EOPNOTSUPP;
+
+	mutex_lock(&adev->pm.mutex);
+	ret = smu_set_residency_gfxoff(smu, value);
+	mutex_unlock(&adev->pm.mutex);
+
+	return ret;
+}
+
+int amdgpu_dpm_get_residency_gfxoff(struct amdgpu_device *adev, u32 *value)
+{
+	struct smu_context *smu = adev->powerplay.pp_handle;
+	int ret = 0;
+
+	if (!is_support_sw_smu(adev))
+		return -EOPNOTSUPP;
+
+	mutex_lock(&adev->pm.mutex);
+	ret = smu_get_residency_gfxoff(smu, value);
+	mutex_unlock(&adev->pm.mutex);
+
+	return ret;
+}
+
+int amdgpu_dpm_get_entrycount_gfxoff(struct amdgpu_device *adev, u64 *value)
+{
+	struct smu_context *smu = adev->powerplay.pp_handle;
+	int ret = 0;
+
+	if (!is_support_sw_smu(adev))
+		return -EOPNOTSUPP;
+
+	mutex_lock(&adev->pm.mutex);
+	ret = smu_get_entrycount_gfxoff(smu, value);
+	mutex_unlock(&adev->pm.mutex);
+
+	return ret;
+}
+
 int amdgpu_dpm_get_status_gfxoff(struct amdgpu_device *adev, uint32_t *value)
 {
 	struct smu_context *smu = adev->powerplay.pp_handle;