drm/radeon: update radeon_atom_get_voltage_table() for SI

SI uses a new atom table revision.  Required for DPM on SI.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/cypress_dpm.c

@@ -1478,7 +1478,7 @@ int cypress_construct_voltage_tables(struct radeon_device *rdev)
 	struct evergreen_power_info *eg_pi = evergreen_get_pi(rdev);
 	int ret;
 
-	ret = radeon_atom_get_voltage_table(rdev, SET_VOLTAGE_TYPE_ASIC_VDDC,
+	ret = radeon_atom_get_voltage_table(rdev, SET_VOLTAGE_TYPE_ASIC_VDDC, 0,
 					    &eg_pi->vddc_voltage_table);
 	if (ret)
 		return ret;
@@ -1488,7 +1488,7 @@ int cypress_construct_voltage_tables(struct radeon_device *rdev)
 							      &eg_pi->vddc_voltage_table);
 
 	if (eg_pi->vddci_control) {
-		ret = radeon_atom_get_voltage_table(rdev, SET_VOLTAGE_TYPE_ASIC_VDDCI,
+		ret = radeon_atom_get_voltage_table(rdev, SET_VOLTAGE_TYPE_ASIC_VDDCI, 0,
 						    &eg_pi->vddci_voltage_table);
 		if (ret)
 			return ret;

drivers/gpu/drm/radeon/radeon.h

@@ -242,7 +242,7 @@ int radeon_atom_get_min_voltage(struct radeon_device *rdev,
 int radeon_atom_get_max_voltage(struct radeon_device *rdev,
 				u8 voltage_type, u16 *max_voltage);
 int radeon_atom_get_voltage_table(struct radeon_device *rdev,
-				  u8 voltage_type,
+				  u8 voltage_type, u8 voltage_mode,
 				  struct atom_voltage_table *voltage_table);
 bool radeon_atom_is_voltage_gpio(struct radeon_device *rdev,
 				 u8 voltage_type, u8 voltage_mode);

drivers/gpu/drm/radeon/radeon_atombios.c

@@ -3372,7 +3372,7 @@ int radeon_atom_round_to_true_voltage(struct radeon_device *rdev,
 }
 
 int radeon_atom_get_voltage_table(struct radeon_device *rdev,
-				  u8 voltage_type,
+				  u8 voltage_type, u8 voltage_mode,
 				  struct atom_voltage_table *voltage_table)
 {
 	int index = GetIndexIntoMasterTable(DATA, VoltageObjectInfo);
@@ -3386,6 +3386,9 @@ int radeon_atom_get_voltage_table(struct radeon_device *rdev,
 		voltage_info = (union voltage_object_info *)
 			(rdev->mode_info.atom_context->bios + data_offset);
 
+		switch (frev) {
+		case 1:
+		case 2:
 			switch (crev) {
 			case 1:
 				DRM_ERROR("old table version %d, %d\n", frev, crev);
@@ -3420,7 +3423,44 @@ int radeon_atom_get_voltage_table(struct radeon_device *rdev,
 				DRM_ERROR("unknown voltage object table\n");
 				return -EINVAL;
 			}
+			break;
+		case 3:
+			switch (crev) {
+			case 1:
+				num_indices = (size - sizeof(ATOM_COMMON_TABLE_HEADER)) /
+					sizeof(ATOM_VOLTAGE_OBJECT_INFO_V3_1);
 
+				for (i = 0; i < num_indices; i++) {
+					if ((voltage_info->v3.asVoltageObj[i].asGpioVoltageObj.sHeader.ucVoltageType ==
+					     voltage_type) &&
+					    (voltage_info->v3.asVoltageObj[i].asGpioVoltageObj.sHeader.ucVoltageMode ==
+					     voltage_mode)) {
+						ATOM_GPIO_VOLTAGE_OBJECT_V3 *gpio =
+							&voltage_info->v3.asVoltageObj[i].asGpioVoltageObj;
+						if (gpio->ucGpioEntryNum > MAX_VOLTAGE_ENTRIES)
+							return -EINVAL;
+						for (j = 0; j < gpio->ucGpioEntryNum; j++) {
+							voltage_table->entries[j].value =
+								le16_to_cpu(gpio->asVolGpioLut[j].usVoltageValue);
+							voltage_table->entries[j].smio_low =
+								le32_to_cpu(gpio->asVolGpioLut[j].ulVoltageId);
+						}
+						voltage_table->mask_low = le32_to_cpu(gpio->ulGpioMaskVal);
+						voltage_table->count = gpio->ucGpioEntryNum;
+						voltage_table->phase_delay = gpio->ucPhaseDelay;
+						return 0;
+					}
+				}
+				break;
+			default:
+				DRM_ERROR("unknown voltage object table\n");
+				return -EINVAL;
+			}
+			break;
+		default:
+			DRM_ERROR("unknown voltage object table\n");
+			return -EINVAL;
+		}
 	}
 	return -EINVAL;
 }

drivers/gpu/drm/radeon/radeon_mode.h

@@ -597,6 +597,7 @@ struct atom_voltage_table
 {
 	u32 count;
 	u32 mask_low;
+	u32 phase_delay;
 	struct atom_voltage_table_entry entries[MAX_VOLTAGE_ENTRIES];
 };