drm/radeon/dpm: add support for SVI2 voltage for SI

[deliverable/linux.git] / drivers / gpu / drm / radeon / radeon_atombios.c

diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 173f378428a96d477eddf937e7bdd3d46fd222a6..fda1e4130af73871b5d8e3a691d353a7a5f25d87 100644 (file)
--- 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)
 {