Quantum Painter QoL enhancements -- auto-poweroff, auto-flush, buffer sizing (#20013)

drivers/painter/gc9a01/qp_gc9a01.c

@@ -1,4 +1,5 @@
 // Copyright 2021 Paul Cotter (@gr1mr3aver)
+// Copyright 2023 Nick Brassel (@tzarc)
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <wait.h>
@@ -141,6 +142,12 @@ painter_device_t qp_gc9a01_make_spi_device(uint16_t panel_width, uint16_t panel_
             driver->spi_dc_reset_config.spi_config.mode            = spi_mode;
             driver->spi_dc_reset_config.dc_pin                     = dc_pin;
             driver->spi_dc_reset_config.reset_pin                  = reset_pin;
+
+            if (!qp_internal_register_device((painter_device_t)driver)) {
+                memset(driver, 0, sizeof(tft_panel_dc_reset_painter_device_t));
+                return NULL;
+            }
+
             return (painter_device_t)driver;
         }
     }