drm/vc4: plane: Add support for RGB[AX]8888 and BGR[AX]8888 formats

The [AX]RGB8888 and [AX]BGR8888 formats were all in the translation
list, but RGB[AX]8888 and BGR[AX]8888 weren't. Seeing as the
writeback connector had them in the list of supported formats, that
meant it could generate content that couldn't be input.

Add the relevant translations.

Whilst T-Format support should be possible, it has not been added at
this stage.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

Author: 6by9

drivers/gpu/drm/vc4/vc4_plane.c

@@ -64,6 +64,30 @@ static const struct hvs_format {
 		.pixel_order = HVS_PIXEL_ORDER_ARGB,
 		.pixel_order_hvs5 = HVS_PIXEL_ORDER_ABGR,
 	},
+	{
+		.drm = DRM_FORMAT_RGBX8888,
+		.hvs = HVS_PIXEL_FORMAT_RGBA8888,
+		.pixel_order = HVS_PIXEL_ORDER_RGBA,
+		.pixel_order_hvs5 = HVS_PIXEL_ORDER_RGBA,
+	},
+	{
+		.drm = DRM_FORMAT_RGBA8888,
+		.hvs = HVS_PIXEL_FORMAT_RGBA8888,
+		.pixel_order = HVS_PIXEL_ORDER_RGBA,
+		.pixel_order_hvs5 = HVS_PIXEL_ORDER_RGBA,
+	},
+	{
+		.drm = DRM_FORMAT_BGRX8888,
+		.hvs = HVS_PIXEL_FORMAT_RGBA8888,
+		.pixel_order = HVS_PIXEL_ORDER_BGRA,
+		.pixel_order_hvs5 = HVS_PIXEL_ORDER_BGRA,
+	},
+	{
+		.drm = DRM_FORMAT_BGRA8888,
+		.hvs = HVS_PIXEL_FORMAT_RGBA8888,
+		.pixel_order = HVS_PIXEL_ORDER_BGRA,
+		.pixel_order_hvs5 = HVS_PIXEL_ORDER_BGRA,
+	},
 	{
 		.drm = DRM_FORMAT_RGB565,
 		.hvs = HVS_PIXEL_FORMAT_RGB565,