1 files changed, 44 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 173f378428a9..fda1e4130af7 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -3397,6 +3397,50 @@ radeon_atom_is_voltage_gpio(struct radeon_device *rdev,
         return false;
 }
 
+int radeon_atom_get_svi2_info(struct radeon_device *rdev,
+                              u8 voltage_type,
+                              u8 *svd_gpio_id, u8 *svc_gpio_id)
+{
+        int index = GetIndexIntoMasterTable(DATA, VoltageObjectInfo);
+        u8 frev, crev;
+        u16 data_offset, size;
+        union voltage_object_info *voltage_info;
+        union voltage_object *voltage_object = NULL;
+
+        if (atom_parse_data_header(rdev->mode_info.atom_context, index, &size,
+                                   &frev, &crev, &data_offset)) {
+                voltage_info = (union voltage_object_info *)
+                        (rdev->mode_info.atom_context->bios + data_offset);
+
+                switch (frev) {
+                case 3:
+                        switch (crev) {
+                        case 1:
+                                voltage_object = (union voltage_object *)
+                                        atom_lookup_voltage_object_v3(&voltage_info->v3,
+                                                                      voltage_type,
+                                                                      VOLTAGE_OBJ_SVID2);
+                                if (voltage_object) {
+                                        *svd_gpio_id = voltage_object->v3.asSVID2Obj.ucSVDGpioId;
+                                        *svc_gpio_id = voltage_object->v3.asSVID2Obj.ucSVCGpioId;
+                                } else {
+                                        return -EINVAL;
+                                }
+                                break;
+                        default:
+                                DRM_ERROR("unknown voltage object table\n");
+                                return -EINVAL;
+                        }
+                        break;
+                default:
+                        DRM_ERROR("unknown voltage object table\n");
+                        return -EINVAL;
+                }
+
+        }
+        return 0;
+}
+
 int radeon_atom_get_max_voltage(struct radeon_device *rdev,
                                 u8 voltage_type, u16 *max_voltage)
 {