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drm/amdgpu: XGMI pstate switch initial support

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Driver vote low to high pstate switch whenever there is an outstanding
XGMI mapping request. Driver vote high to low pstate when all the
outstanding XGMI mapping is terminated.

Signed-off-by: shaoyunl <shaoyun.liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
shaoyunl
2019-02-21 16:30:25 -05:00
committed by Alex Deucher
parent a690aa0f45
commit 9b638f9751
6 changed files with 53 additions and 1 deletions
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15
drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
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@@ -200,6 +200,7 @@ struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev, int lo
if (lock)
mutex_lock(&tmp->hive_lock);
tmp->pstate = -1;
mutex_unlock(&xgmi_mutex);
@@ -321,3 +322,17 @@ void amdgpu_xgmi_remove_device(struct amdgpu_device *adev)
mutex_unlock(&hive->hive_lock);
}
}
int amdgpu_xgmi_set_pstate(struct amdgpu_device *adev, int pstate)
{
int ret = 0;
struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev, 0);
if (!hive)
return 0;
if (hive->pstate == pstate)
return 0;
/* Todo : sent the message to SMU for pstate change */
return ret;
}