diff -Nru libdrm-2.4.109/debian/changelog libdrm-2.4.109/debian/changelog
--- libdrm-2.4.109/debian/changelog	2021-12-20 05:39:47.000000000 +0000
+++ libdrm-2.4.109/debian/changelog	2021-12-27 10:46:36.000000000 +0000
@@ -1,3 +1,10 @@
+libdrm (2.4.109-2+rpi1) bookworm-staging; urgency=medium
+
+  [changes brought forward from 2.4.74-1+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Wed, 28 Jun 2017 21:14:42 +0000]
+  * Move valgrind to build-conflicts, the old version in raspbian breaks the build.
+
+ -- Raspbian forward porter <root@raspbian.org>  Mon, 27 Dec 2021 10:46:36 +0000
+
 libdrm (2.4.109-2) unstable; urgency=medium
 
   * amdgpu1.symbols: Updated. (Closes: #1001965)
diff -Nru libdrm-2.4.109/debian/control libdrm-2.4.109/debian/control
--- libdrm-2.4.109/debian/control	2021-12-15 15:55:18.000000000 +0000
+++ libdrm-2.4.109/debian/control	2021-12-27 10:46:36.000000000 +0000
@@ -15,6 +15,8 @@
  libpciaccess-dev,
  python3-docutils,
 # valgrind [amd64 armhf i386 mips mipsel powerpc s390x],
+Build-conflicts:
+ Valgrind
 Standards-Version: 4.5.0
 Section: libs
 Vcs-Git: https://salsa.debian.org/xorg-team/lib/libdrm