gb_addr_config = VEGA12_GB_ADDR_CONFIG_GOLDEN;
                DRM_INFO("fix gfx.config for vega12\n");
                break;
+       case CHIP_VEGA20:
+               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 = RREG32_SOC15(GC, 0, mmGB_ADDR_CONFIG);
+               gb_addr_config &= ~0xf3e777ff;
+               gb_addr_config |= 0x22014042;
+               break;
        case CHIP_RAVEN:
                adev->gfx.config.max_hw_contexts = 8;
                adev->gfx.config.sc_prim_fifo_size_frontend = 0x20;