drm/amdgpu/gfx9: add gfx config for vega12

Just a place holder for now.
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

@@ -981,6 +981,15 @@ static void gfx_v9_0_gpu_early_init(struct amdgpu_device *adev)
 		adev->gfx.config.sc_earlyz_tile_fifo_size = 0x4C0;
 		gb_addr_config = VEGA10_GB_ADDR_CONFIG_GOLDEN;
 		break;
+	case CHIP_VEGA12:
+		adev->gfx.config.max_hw_contexts = 8;
+		adev->gfx.config.sc_prim_fifo_size_frontend = 0x20;
+		adev->gfx.config.sc_prim_fifo_size_backend = 0x100;
+		adev->gfx.config.sc_hiz_tile_fifo_size = 0x30;
+		adev->gfx.config.sc_earlyz_tile_fifo_size = 0x4C0;
+		gb_addr_config = VEGA10_GB_ADDR_CONFIG_GOLDEN;
+		DRM_INFO("fix gfx.config for vega12\n");
+		break;
 	case CHIP_RAVEN:
 		adev->gfx.config.max_hw_contexts = 8;
 		adev->gfx.config.sc_prim_fifo_size_frontend = 0x20;