drm/amd/pm: add xgmi_plpd_policy sysfs node for user to change plpd policy

[linux-2.6-microblaze.git] / drivers / gpu / drm / amd / pm / amdgpu_dpm.c

diff --git a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
index 078aaaa..9a157fe 100644 (file)
--- a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
@@ -365,6 +365,49 @@ int amdgpu_dpm_allow_xgmi_power_down(struct amdgpu_device *adev, bool en)
        return ret;
 }
 
+int amdgpu_dpm_get_xgmi_plpd_mode(struct amdgpu_device *adev, char **mode_desc)
+{
+       struct smu_context *smu = adev->powerplay.pp_handle;
+       int mode = XGMI_PLPD_NONE;
+
+       if (is_support_sw_smu(adev)) {
+               mode = smu->plpd_mode;
+               if (mode_desc == NULL)
+                       return mode;
+               switch (smu->plpd_mode) {
+               case XGMI_PLPD_DISALLOW:
+                       *mode_desc = "disallow";
+                       break;
+               case XGMI_PLPD_DEFAULT:
+                       *mode_desc = "default";
+                       break;
+               case XGMI_PLPD_OPTIMIZED:
+                       *mode_desc = "optimized";
+                       break;
+               case XGMI_PLPD_NONE:
+               default:
+                       *mode_desc = "none";
+                       break;
+               }
+       }
+
+       return mode;
+}
+
+int amdgpu_dpm_set_xgmi_plpd_mode(struct amdgpu_device *adev, int mode)
+{
+       struct smu_context *smu = adev->powerplay.pp_handle;
+       int ret = -EOPNOTSUPP;
+
+       if (is_support_sw_smu(adev)) {
+               mutex_lock(&adev->pm.mutex);
+               ret = smu_set_xgmi_plpd_mode(smu, mode);
+               mutex_unlock(&adev->pm.mutex);
+       }
+
+       return ret;
+}
+
 int amdgpu_dpm_enable_mgpu_fan_boost(struct amdgpu_device *adev)
 {
        void *pp_handle = adev->powerplay.pp_handle;