drm/atmel-hlcdc: set layer REP bit to enable replication logic

This bit enabled replication logic to expand an RGB color less than 24 bits, to
24 bits, which is used internally for all formats.  Otherwise, the least
significant bits are always set to zero and the color may not be what is
expected.

Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>

Author: joshua-henderson

drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c

@@ -372,7 +372,7 @@ atmel_hlcdc_plane_update_general_settings(struct atmel_hlcdc_plane *plane,
 	atmel_hlcdc_layer_write_cfg(&plane->layer, ATMEL_HLCDC_LAYER_DMA_CFG,
 				    cfg);
 
-	cfg = ATMEL_HLCDC_LAYER_DMA;
+	cfg = ATMEL_HLCDC_LAYER_DMA | ATMEL_HLCDC_LAYER_REP;
 
 	if (plane->base.type != DRM_PLANE_TYPE_PRIMARY) {
 		cfg |= ATMEL_HLCDC_LAYER_OVR | ATMEL_HLCDC_LAYER_ITER2BL |