drm/amd/pm: Add reset option for fan_curve on smu13_0_0

Add reset option for fan_curve.
User can use command "echo r > fan_cure" to reset the fan_curve
to boot value

Signed-off-by: Ma Jun <[e-mail]>
Acked-by: Alex Deucher <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/pm/amdgpu_pm.c

···
 	case 'c':
 		*type = PP_OD_COMMIT_DPM_TABLE;
 		return 0;
+	case 'r':
+		params[parameter_size] = *type;
+		*num_of_params = 1;
+		*type = PP_OD_RESTORE_DEFAULT_TABLE;
+		return 0;
 	default:
 		break;
 	}
···
  *
  * When you have finished the editing, write "c" (commit) to the file to commit
  * your changes.
+ *
+ * If you want to reset to the default value, write "r" (reset) to the file to
+ * reset them
  *
  * There are two fan control modes supported: auto and manual. With auto mode,
  * PMFW handles the fan speed control(how fan speed reacts to ASIC temperature).

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c

···
 	return size;
 }
 
+
+static int smu_v13_0_0_od_restore_table_single(struct smu_context *smu, long input)
+{
+	struct smu_table_context *table_context = &smu->smu_table;
+	OverDriveTableExternal_t *boot_overdrive_table =
+		(OverDriveTableExternal_t *)table_context->boot_overdrive_table;
+	OverDriveTableExternal_t *od_table =
+		(OverDriveTableExternal_t *)table_context->overdrive_table;
+	struct amdgpu_device *adev = smu->adev;
+	int i;
+
+	switch (input) {
+	case PP_OD_EDIT_FAN_CURVE:
+		for (i = 0; i < NUM_OD_FAN_MAX_POINTS; i++) {
+			od_table->OverDriveTable.FanLinearTempPoints[i] =
+					boot_overdrive_table->OverDriveTable.FanLinearTempPoints[i];
+			od_table->OverDriveTable.FanLinearPwmPoints[i] =
+					boot_overdrive_table->OverDriveTable.FanLinearPwmPoints[i];
+		}
+		od_table->OverDriveTable.FanMode = FAN_MODE_AUTO;
+		od_table->OverDriveTable.FeatureCtrlMask |= BIT(PP_OD_FEATURE_FAN_CURVE_BIT);
+		break;
+	default:
+		dev_info(adev->dev, "Invalid table index: %ld\n", input);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int smu_v13_0_0_od_edit_dpm_table(struct smu_context *smu,
 					 enum PP_OD_DPM_TABLE_COMMAND type,
 					 long input[],
···
 		break;
 
 	case PP_OD_RESTORE_DEFAULT_TABLE:
-		feature_ctrlmask = od_table->OverDriveTable.FeatureCtrlMask;
-		memcpy(od_table,
+		if (size == 1) {
+			ret = smu_v13_0_0_od_restore_table_single(smu, input[0]);
+			if (ret)
+				return ret;
+		} else {
+			feature_ctrlmask = od_table->OverDriveTable.FeatureCtrlMask;
+			memcpy(od_table,
 		       table_context->boot_overdrive_table,
 		       sizeof(OverDriveTableExternal_t));
-		od_table->OverDriveTable.FeatureCtrlMask = feature_ctrlmask;
+			od_table->OverDriveTable.FeatureCtrlMask = feature_ctrlmask;
+		}
 		fallthrough;
-
 	case PP_OD_COMMIT_DPM_TABLE:
 		/*
 		 * The member below instructs PMFW the settings focused in