diff -up chromium-125.0.6422.60/ui/gfx/linux/drm_util_linux.cc.el7-old-libdrm chromium-125.0.6422.60/ui/gfx/linux/drm_util_linux.cc
--- chromium-125.0.6422.60/ui/gfx/linux/drm_util_linux.cc.el7-old-libdrm	2024-05-16 20:43:26.619455300 +0200
+++ chromium-125.0.6422.60/ui/gfx/linux/drm_util_linux.cc	2024-05-16 20:45:18.120716278 +0200
@@ -9,6 +9,14 @@
 #include "base/logging.h"
 #include "base/notreached.h"
 
+// the libdrm in EL-7 is too old to have this define
+#ifndef DRM_FORMAT_P010
+#define DRM_FORMAT_P010 fourcc_code('P', '0', '1', '0')
+#endif
+#ifndef DRM_FORMAT_ABGR16161616F
+#define DRM_FORMAT_ABGR16161616F fourcc_code('A', 'B', '4', 'H')
+#endif
+
 namespace ui {
 
 int GetFourCCFormatFromBufferFormat(gfx::BufferFormat format) {