drm: rcar-du: Add support for missing 16-bit RGB4444 formats

Add support for the DRM_FORMAT_RGBA4444, DRM_FORMAT_RGBX4444,
DRM_FORMAT_ABGR4444, DRM_FORMAT_XBGR4444, DRM_FORMAT_BGRA4444 and
DRM_FORMAT_BGRX4444 formats to the DU driver. Those formats are only
available on Gen3.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Acked-by: Daniel Vetter <daniel@ffwll.ch>

drivers/gpu/drm/rcar-du/rcar_du_kms.c

@@ -123,6 +123,36 @@ static const struct rcar_du_format_info rcar_du_format_infos[] = {
 		.v4l2 = V4L2_PIX_FMT_XRGB444,
 		.bpp = 16,
 		.planes = 1,
+	}, {
+		.fourcc = DRM_FORMAT_RGBA4444,
+		.v4l2 = V4L2_PIX_FMT_RGBA444,
+		.bpp = 16,
+		.planes = 1,
+	}, {
+		.fourcc = DRM_FORMAT_RGBX4444,
+		.v4l2 = V4L2_PIX_FMT_RGBX444,
+		.bpp = 16,
+		.planes = 1,
+	}, {
+		.fourcc = DRM_FORMAT_ABGR4444,
+		.v4l2 = V4L2_PIX_FMT_ABGR444,
+		.bpp = 16,
+		.planes = 1,
+	}, {
+		.fourcc = DRM_FORMAT_XBGR4444,
+		.v4l2 = V4L2_PIX_FMT_XBGR444,
+		.bpp = 16,
+		.planes = 1,
+	}, {
+		.fourcc = DRM_FORMAT_BGRA4444,
+		.v4l2 = V4L2_PIX_FMT_BGRA444,
+		.bpp = 16,
+		.planes = 1,
+	}, {
+		.fourcc = DRM_FORMAT_BGRX4444,
+		.v4l2 = V4L2_PIX_FMT_BGRX444,
+		.bpp = 16,
+		.planes = 1,
 	}, {
 		.fourcc = DRM_FORMAT_BGR888,
 		.v4l2 = V4L2_PIX_FMT_RGB24,