[PATCH 2/6] drm: fourcc byteorder: add DRM_FORMAT_CPU_*

From: Gerd Hoffmann
Date: Mon Apr 24 2017 - 02:26:06 EST


Add fourcc variants in cpu byte order. With these at hand we don't
need #ifdefs in drivers want support framebuffers in cpu endianess.

Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
---
include/drm/drm_fourcc.h | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h
index 6942e84b6e..cae05153e8 100644
--- a/include/drm/drm_fourcc.h
+++ b/include/drm/drm_fourcc.h
@@ -25,6 +25,18 @@
#include <linux/types.h>
#include <uapi/drm/drm_fourcc.h>

+/*
+ * DRM formats are little endian. define cpu endian variants here, to
+ * reduce the #ifdefs needed in drivers.
+ */
+#ifdef __BIG_ENDIAN
+# define DRM_FORMAT_CPU_XRGB8888 DRM_FORMAT_BGRX8888
+# define DRM_FORMAT_CPU_ARGB8888 DRM_FORMAT_BGRA8888
+#else
+# define DRM_FORMAT_CPU_XRGB8888 DRM_FORMAT_XRGB8888
+# define DRM_FORMAT_CPU_ARGB8888 DRM_FORMAT_ARGB8888
+#endif
+
struct drm_device;
struct drm_mode_fb_cmd2;

--
2.9.3