From cbd6423e90b06d9a942f4058b52386188b16e995 2020-11-17 15:51:05
From: g-vidal <gerard.vidal@ens-lyon.fr>
Date: 2020-11-17 15:51:05
Subject: [PATCH] enble to add graphics acceleration for Pi4

---

diff --git a/bootstrap.d/15-rpi-config.sh b/bootstrap.d/15-rpi-config.sh
index 63f556c..2e318b9 100644
--- a/bootstrap.d/15-rpi-config.sh
+++ b/bootstrap.d/15-rpi-config.sh
@@ -265,7 +265,7 @@ fi
 echo "${CMDLINE}" > "${BOOT_DIR}/cmdline.txt"
 
 # Setup minimal GPU memory allocation size: 16MB (no X)
-if [ "$ENABLE_MINGPU" = true ] ; then
+if [ "$ENABLE_MINGPU" = true ] && [ "$ENABLE_GR_ACCEL" = false ]  ; then
   echo "gpu_mem=16" >> "${BOOT_DIR}/config.txt"
 fi
 
@@ -310,6 +310,17 @@ if [ "$ENABLE_SPI" = true ] ; then
   fi
 fi
 
+#Enable graphics acceleration for Model 4
+if [ "$RPI_MODEL" = 4 ] && [ "$ENABLE_GR_ACCEL" = true ] ; then
+  echo "max_framebuffers=2" >> "${BOOT_DIR}/config.txt"
+  echo "arm_64bit=1" >> "${BOOT_DIR}/config.txt"
+  echo "cmdline=cmdline.txt" >> "${BOOT_DIR}/config.txt"
+  echo "dtparam=audio=on" >> "${BOOT_DIR}/config.txt"
+  echo "gpu_mem=128" >> "${BOOT_DIR}/config.txt"
+  echo "dtoverlay=vc4-fkms-v3d, cma-128" >> "${BOOT_DIR}/config.txt"
+fi
+
+
 # Disable RPi2/3 under-voltage warnings
 if [ -n "$DISABLE_UNDERVOLT_WARNINGS" ] ; then
   echo "avoid_warnings=${DISABLE_UNDERVOLT_WARNINGS}" >> "${BOOT_DIR}/config.txt"
diff --git a/rpi23-gen-image.sh b/rpi23-gen-image.sh
index 8ec0198..1393b8e 100755
--- a/rpi23-gen-image.sh
+++ b/rpi23-gen-image.sh
@@ -191,6 +191,7 @@ CHROOT_SCRIPTS=${CHROOT_SCRIPTS:=""}
 ENABLE_UBOOT=${ENABLE_UBOOT:=false}
 UBOOTSRC_DIR=${UBOOTSRC_DIR:=""}
 ENABLE_FBTURBO=${ENABLE_FBTURBO:=false}
+ENABLE_GR_ACCEL=$ENABLE_GR_ACCEL:=true}
 FBTURBOSRC_DIR=${FBTURBOSRC_DIR:=""}
 ENABLE_VIDEOCORE=${ENABLE_VIDEOCORE:=false}
 VIDEOCORESRC_DIR=${VIDEOCORESRC_DIR:=""}